Adaptive assembly method and engine crankshaft assembly
By adopting an adaptive assembly method and using closed-loop control of hydraulic expansion and axial propulsion, the problem of wall scratches in the interference fit between the flywheel flange and the crankshaft was solved, improving the assembly quality and precision and reducing the scrap rate.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- WEICHAI POWER CO LTD
- Filing Date
- 2024-03-14
- Publication Date
- 2026-07-10
Smart Images
Figure CN117943829B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of engine technology, and more particularly to an adaptive assembly method and an engine crankshaft assembly. Background Technology
[0002] Due to space constraints on the engine, the crankshaft diameter cannot be designed to be large enough. Therefore, a flywheel flange needs to be added between the flywheel and the crankshaft to allow for their assembly. Specifically, the flywheel flange has a frustum-shaped mounting hole, and the crankshaft has a frustum-shaped mounting shaft section. The frustum-shaped mounting hole and the frustum-shaped mounting shaft section must be interference-fitted. It can be understood that the amount of interference fit between the frustum-shaped mounting hole and the frustum-shaped mounting shaft section depends on the axial advancement distance of the flywheel flange.
[0003] Currently, existing technologies primarily employ hydraulic press-fitting to interference-fit the assembly shaft section and flywheel flange. This method first uses a positioning component to determine the relative positions of the assembly shaft section and flywheel flange. Then, hydraulically, the flywheel flange is expanded radially in one go until it undergoes slight deformation. Finally, a drive component propels the flywheel flange axially in one go, ensuring the interference fit is achieved. However, this assembly method relies on empirical values for both radial and axial forces. Inconsistent application of these forces can lead to axial force being applied before the assembly hole of the flywheel flange has fully expanded. Furthermore, the flywheel flange is pushed axially to its intended position in one go, making the inner wall of the assembly hole and / or the outer wall of the assembly shaft section prone to scratches, increasing the scrap rate of the flywheel flange and / or crankshaft. Summary of the Invention
[0004] The purpose of this invention is to provide an adaptive assembly method and an engine crankshaft assembly to solve the problem in the existing adaptive assembly method that the applied radial force and axial thrust are unreasonable. This causes the axial thrust to be applied to push the flywheel flange before the assembly hole of the flywheel flange has been fully expanded, and the flywheel flange is pushed to the expected assembly position in one axial motion. This makes the inner peripheral wall of the assembly hole and / or the outer peripheral wall of the assembly shaft section easy to be scratched, increasing the scrap rate of the flywheel flange and / or crankshaft.
[0005] To achieve this objective, the present invention adopts the following technical solution:
[0006] An adaptive assembly method is provided, wherein an engine crankshaft assembly includes a flywheel flange and a crankshaft, the flywheel flange having a frustum-shaped mounting hole, and the crankshaft having a frustum-shaped mounting shaft segment; the adaptive assembly method is used to interference fit the mounting shaft segment to the mounting hole, and the adaptive assembly method includes:
[0007] S100. Fix the crankshaft in the correct position and make the inner peripheral wall of the mounting hole initially fit with the outer peripheral wall of the mounting shaft section in the circumferential direction.
[0008] S200, The radial force applied to the inner peripheral wall of the assembly hole is increased by hydraulic expansion;
[0009] S300. Determine whether the mounting hole of the flywheel flange has been expanded to the expected state.
[0010] If not, return to step S200;
[0011] If so, proceed to step S400;
[0012] S400, control the increase of the axial force applied to the flywheel flange by a set step size; wherein the set step size is less than or equal to the critical step size that does not scratch the inner peripheral wall of the mounting hole and the outer peripheral wall of the mounting shaft section;
[0013] S500. Determine whether the flywheel flange has been axially advanced to the expected state.
[0014] If not, return to step S400;
[0015] If so, proceed to step S600;
[0016] S600, Determine whether the assembly shaft segment and the assembly hole are properly interference-fitted;
[0017] If not, return to step S200.
[0018] As a preferred embodiment of the above-mentioned adaptive assembly method, an oil groove is recessed in one of the inner peripheral wall of the assembly hole and the outer peripheral wall of the assembly shaft segment.
[0019] A radial force is applied to the inner peripheral wall of the mounting hole by injecting hydraulic oil into the oil tank; wherein the radial force applied to the inner peripheral wall of the mounting hole is less than or equal to the maximum allowable radial force of the flywheel flange.
[0020] As a preferred embodiment of the above adaptive assembly method, step S300 includes:
[0021] S310. Obtain the current actual radial force between the inner peripheral wall of the assembly hole and the outer peripheral wall of the assembly shaft segment;
[0022] S320. Determine whether the assembly hole of the flywheel flange has been expanded to the expected state based on the difference between the currently applied radial force and the current actual radial force.
[0023] As a preferred embodiment of the above adaptive assembly method, step S320 includes:
[0024] Determine whether (currently applied radial force - current actual radial force) is greater than a first set difference; wherein, the first set difference is the critical difference between the inner peripheral wall of the assembly hole and the outer peripheral wall of the assembly shaft section that can generate an oil drain gap;
[0025] If (currently applied radial force - current actual radial force) is greater than the first set difference, then the mounting hole of the flywheel flange is expanded to the expected state.
[0026] If (currently applied radial force - current actual radial force) is less than or equal to the first set difference, then the mounting hole of the flywheel flange in this case has not been expanded to the expected state.
[0027] As a preferred embodiment of the above adaptive assembly method, step S500 includes:
[0028] S510. Obtain the current actual radial force between the inner peripheral wall of the assembly hole and the outer peripheral wall of the assembly shaft segment;
[0029] S520. Determine whether the flywheel flange has been axially advanced to the expected state based on the difference between the currently applied radial force and the current actual radial force.
[0030] As a preferred embodiment of the above adaptive assembly method, step S520 includes:
[0031] Determine whether (currently applied radial force - current actual radial force) is greater than a first set difference; wherein, the first set difference is the critical difference between the inner peripheral wall of the assembly hole and the outer peripheral wall of the assembly shaft section that can generate an oil drain gap;
[0032] If (currently applied radial force - current actual radial force) is greater than the first set difference, then the flywheel flange was not pushed axially to the expected state in this instance.
[0033] If (currently applied radial force - current actual radial force) is less than or equal to the first set difference, then the flywheel flange is axially advanced to the expected state.
[0034] As a preferred embodiment of the above adaptive assembly method, step S600 includes:
[0035] S610. Obtain the actual amount of axial advancement of the flywheel flange from its initial position; wherein, the initial position is the position of the flywheel flange along the axial direction when the inner peripheral wall of the assembly hole and the outer peripheral wall of the assembly shaft section are initially in circumferential contact.
[0036] S620. Determine whether the assembly shaft segment and the assembly hole are properly interference-fitted based on the actual propulsion amount and the theoretical propulsion amount.
[0037] As a preferred embodiment of the above adaptive assembly method, step S620 includes:
[0038] Determine whether the absolute value of the difference between the actual propulsion amount and the theoretical propulsion amount is less than or equal to a second preset difference;
[0039] If the absolute value of the difference between the actual propulsion amount and the theoretical propulsion amount is less than or equal to the second set difference, then the assembly shaft segment and the assembly hole are interference-fitted into place.
[0040] If the absolute value of the difference between the actual propulsion amount and the theoretical propulsion amount is greater than the second set difference value, then the assembly shaft segment and the assembly hole are not properly interference-fitted.
[0041] As a preferred embodiment of the above-mentioned adaptive assembly method, the auxiliary assembly device includes a positioning component and a driving component. The positioning component can adjust the central axis of the flywheel flange to be collinear with the central axis of the assembly shaft segment. The output end of the driving component is connected to the positioning component and can drive the positioning component to move axially along the flywheel flange. Step S100 includes:
[0042] S110. Fix the setting position of the crankshaft;
[0043] S120. Position the center axis of the flywheel flange to be collinear with the center axis of the assembly shaft section using the positioning component;
[0044] S130. The drive assembly applies an initial axial force to the positioning assembly, causing the flywheel flange to move axially, so that the inner peripheral wall of the assembly hole and the outer peripheral wall of the assembly shaft section initially fit together circumferentially.
[0045] An engine crankshaft assembly includes a flywheel flange and a crankshaft. The flywheel flange has a frustum-shaped mounting hole, and the crankshaft has a frustum-shaped mounting shaft section for implementing the above-mentioned adaptive assembly method to interference fit the mounting shaft section with the mounting hole.
[0046] The beneficial effects of this invention are:
[0047] The purpose of this invention is to provide an adaptive assembly method and an engine crankshaft assembly. This adaptive assembly method is used to interference-fit the assembly shaft segment with the assembly hole. Specifically, when interference-fitting the assembly shaft segment with the flywheel flange assembly hole, the crankshaft's position is first fixed, and the inner circumferential wall of the assembly hole is initially brought into circumferential contact with the outer circumferential wall of the assembly shaft segment. Then, the radial force applied to the inner circumferential wall of the assembly hole is increased by hydraulic expansion. Afterwards, it is checked whether the flywheel flange assembly hole has expanded to the expected state. If the flywheel flange assembly hole has not expanded to the expected state, the radial force applied to the inner circumferential wall of the assembly hole is adaptively increased until the flywheel flange assembly hole is expanded to the expected state. It can be understood that the crankshaft assembly hole is only expanded to the expected state if and only if the crankshaft assembly hole is not expanded to the expected state. After the assembly hole is expanded to the expected state, that is, after the assembly hole is fully expanded, the axial force applied to the flywheel flange is controlled to increase, so that the flywheel flange is pushed forward axially. In the process of controlling the increase of the axial force applied to the flywheel flange, the axial force applied to the flywheel flange is increased by a set step size. The set step size is less than or equal to the critical step size that will not scratch the inner peripheral wall of the assembly hole and the outer peripheral wall of the assembly shaft section. Therefore, each time the axial force applied to the flywheel flange is increased, the flywheel flange can only move a certain distance axially, and the distance moved will not cause scratches on the inner peripheral wall of the assembly hole and the outer peripheral wall of the assembly shaft section.
[0048] Secondly, after increasing the axial force applied to the flywheel flange, it is checked whether the flywheel flange has been pushed axially to the expected state. If the flywheel flange has not been pushed axially to the expected state, the axial force applied to the flywheel flange is adaptively increased by a set step size until the flywheel flange is pushed axially to the expected state. Only when the flywheel flange is pushed axially to the expected state is the push of the flywheel flange considered complete. Then, it is determined whether the assembly shaft section and the assembly hole are interference-fitted in the axial direction. If the assembly shaft section and the assembly hole are not interference-fitted in the axial direction, the process returns to the previous step and the radial force applied to the inner circumferential wall of the assembly hole is increased by hydraulic expansion until the assembly shaft section and the assembly hole are interference-fitted in the axial direction. This allows for multiple radial expansions of the assembly hole and axial pushes of the flywheel flange through a closed-loop and adaptive approach until the assembly shaft section and the assembly hole are interference-fitted in the axial direction.
[0049] Therefore, by using this adaptive assembly method to interference fit the assembly shaft segment and the assembly hole, the phenomenon of scratching the inner peripheral wall of the assembly hole and / or the outer peripheral wall of the assembly shaft segment can be effectively avoided, and the assembly quality, assembly precision and accuracy of interference fitting the assembly shaft segment and the assembly hole can be effectively improved. Attached Figure Description
[0050] Figure 1 This is a structural schematic diagram of the flywheel flange provided in a specific embodiment of the present invention;
[0051] Figure 2 This is a cross-sectional view of the flywheel flange provided in a specific embodiment of the present invention;
[0052] Figure 3 This is a cross-sectional view of the assembly of the auxiliary assembly device and the engine crankshaft assembly provided in a specific embodiment of the present invention;
[0053] Figure 4 This is a partial structural schematic diagram of the auxiliary assembly device provided in a specific embodiment of the present invention;
[0054] Figure 5 This is a flowchart of the adaptive assembly method provided in a specific embodiment of the present invention. Figure 1 ;
[0055] Figure 6 This is a flowchart of the adaptive assembly method provided in a specific embodiment of the present invention. Figure 2 .
[0056] In the picture:
[0057] 1. Flywheel flange; 11. Assembly hole; 12. Spiral oil groove; 13. First annular oil groove; 14. Second annular oil groove; 15. Oil delivery channel; 16. Third positioning groove;
[0058] 2. Assembly shaft section; 21. First positioning groove;
[0059] 3. Positioning component; 31. Positioning plate; 32. First positioning pin; 321. Limiting edge; 33. Elastic element; 34. Second positioning pin. Detailed Implementation
[0060] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.
[0061] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.
[0062] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0063] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention. In addition, the terms "first" and "second" are used only for distinction in description and have no special meaning.
[0064] Figure 1 This is a structural schematic diagram of the flywheel flange 1 provided in a specific embodiment of the present invention. Figure 2 This is a cross-sectional view of the flywheel flange 1 provided in a specific embodiment of the present invention. Figure 3 This is a cross-sectional view of the assembly of the auxiliary assembly device and the engine crankshaft assembly provided in a specific embodiment of the present invention. Figure 4 This is a partial structural schematic diagram of the auxiliary assembly device provided in a specific embodiment of the present invention. Figure 5 This is a flowchart of the adaptive assembly method provided in a specific embodiment of the present invention. Figure 1 . Figure 6 This is a flowchart of the adaptive assembly method provided in a specific embodiment of the present invention. Figure 2 .
[0065] like Figures 1 to 3 As shown, the present invention provides an engine crankshaft assembly, which includes a flywheel flange 1 and a crankshaft. The flywheel flange 1 has a frustum-shaped mounting hole 11, and the crankshaft has a frustum-shaped mounting shaft section 2, which is interference-fitted with the mounting hole 11. It is understood that the central axis of the flywheel flange 1, the central axis of the mounting hole 11, and the central axis of the mounting shaft section 2 are all collinear.
[0066] One of the inner peripheral walls of the assembly hole 11 and the outer peripheral wall of the assembly shaft section 2 is provided with an oil groove, and the hydraulic expansion assembly is used to supply hydraulic oil into the oil groove. It is understood that the oil groove is distributed between the inner peripheral wall of the assembly hole 11 and the outer peripheral wall of the assembly shaft section 2, and the oil groove is connected to the assembly hole 11 and the hydraulic expansion assembly. This arrangement allows a radial force to be applied to the inner peripheral wall of the assembly hole 11 by injecting hydraulic oil into the oil groove, thereby enabling the assembly hole 11 to expand.
[0067] Specifically, in this embodiment, such as Figures 1 to 3 As shown, an exemplary embodiment features an oil groove recessed in the inner peripheral wall of the assembly hole 11, distributed between the inner peripheral wall of the assembly hole 11 and the outer peripheral wall of the assembly shaft segment 2, and the oil groove communicates with the assembly hole 11 and the hydraulic expansion assembly. As an alternative embodiment, an oil groove is recessed in the outer peripheral wall of the assembly shaft segment 2, distributed between the inner peripheral wall of the assembly hole 11 and the outer peripheral wall of the assembly shaft segment 2, and the oil groove communicates with the assembly hole 11 and the hydraulic expansion assembly.
[0068] Preferably, in this embodiment, such as Figure 1 and Figure 2 As shown, the oil groove includes a spiral oil groove 12, which is recessed into the inner peripheral wall of the assembly hole 11 and extends axially along the assembly hole 11. Along the axial direction of the flywheel flange 1, both ends of the spiral oil groove 12 are distributed between the two end faces of the flywheel flange 1, and are spaced apart from the two end faces. The spiral oil groove 12 is used for the flow of hydraulic oil. The outer peripheral wall of the assembly shaft section 2 can form a spiral expansion oil passage with the spiral oil groove 12. It can be understood that neither end of the spiral oil groove 12 is connected to the two end faces of the flywheel flange 1, and neither end of the spiral expansion oil passage is connected to the two end faces of the flywheel flange 1. Therefore, when hydraulic oil is injected into the spiral expansion oil passage, the hydraulic oil can apply a radial force to the inner peripheral wall of the assembly hole 11, causing the assembly hole 11 to expand, thereby enabling the assembly shaft section 2 to be interference-fitted into the assembly hole 11. Specifically, by setting the spiral oil groove 12 distributed on the flywheel flange 1, it is equivalent to setting an oil groove on the outer peripheral wall of the assembly shaft section 2. In terms of structural complexity, it can effectively reduce the positioning component 3 and the hydraulic expansion component, and facilitate the assembly of flywheel flange 1, assembly shaft section 2, positioning component 3 and hydraulic expansion component; secondly, the spiral oil groove 12 is coiled around the circumference of the assembly hole 11 and extends along the axial direction of the flywheel flange 1, which enables the assembly hole 11 to be expanded quickly and efficiently, and can effectively improve the expansion quality of the assembly hole 11. In the process of expanding the assembly hole 11, it can also improve the lubrication uniformity of the inner peripheral wall of the assembly hole 11 and the outer peripheral wall of the assembly shaft section 2.
[0069] More preferably, such as Figures 1 to 3As shown, the oil groove also includes a first annular oil groove 13 recessed in the inner peripheral wall of the assembly hole 11. The first annular oil groove 13 is connected to the hydraulic expansion assembly and can form a first annular expansion oil passage with the outer peripheral wall of the assembly shaft section 2. There are two spiral expansion oil passages. Along the axial direction of the flywheel flange 1, the two spiral expansion oil passages are located on both sides of the first annular expansion oil passage and are both connected to the first annular expansion oil passage. It can be understood that there are two spiral oil grooves 12. Along the axial direction of the flywheel flange 1, the two spiral oil grooves 12 are located on both sides of the first annular oil groove 13 and are both connected to the first annular oil groove 13. This allows for further improvement in the efficiency of expanding the assembly hole 11 while ensuring the expansion quality of the assembly hole 11, and also further improves the lubrication uniformity of the inner peripheral wall of the assembly hole 11 and the outer peripheral wall of the assembly shaft section 2 during the expansion process.
[0070] More preferably, such as Figures 1 to 3 As shown, the oil groove also includes two second annular oil grooves 14 recessed in the inner peripheral wall of the assembly hole 11. The second annular oil grooves 14 can form a second annular expansion oil passage with the outer peripheral wall of the assembly shaft section 2. The two second annular expansion oil passages are arranged and connected one-to-one with the two spiral expansion oil passages. Along the axial direction of the flywheel flange 1, the two second annular expansion oil passages are located on both sides of the two spiral expansion oil passages and are spaced apart from the two end faces of the flywheel flange 1. This arrangement can further improve the efficiency of expanding the assembly hole 11, further improve the expansion quality of the assembly hole 11, and further improve the lubrication uniformity of the inner peripheral wall of the assembly hole 11 and the outer peripheral wall of the assembly shaft section 2 during the expansion of the assembly hole 11.
[0071] Specifically, the two spiral expansion channels, the first annular expansion channel, and the two second annular expansion channels form the total expansion channel. It is understandable that the specific structure of the total expansion channel can be adaptively adjusted according to actual operating conditions.
[0072] More preferably, along the axial direction of the flywheel flange 1, the total expansion oil passage is positioned near the small end of the assembly hole 11. That is, along the axial direction of the flywheel flange 1, the distance between the total expansion oil passage and the small end of the assembly hole 11 is less than the distance between the total expansion oil passage and the large end of the assembly hole 11. It is understood that when the assembly shaft segment 2 is interference-fitted to the assembly hole 11, the small end of the assembly hole 11 is more difficult to expand relative to the large end of the assembly hole 11. Therefore, this arrangement can further improve the efficiency and quality of expanding the assembly hole 11, thereby improving the assembly efficiency and quality of interference-fitting the assembly shaft segment 2 to the assembly hole 11. In other embodiments, the total expansion oil passage may also be positioned near the large end of the assembly hole 11. Alternatively, the distance between the two ends of the total expansion oil passage and the two ends of the assembly hole 11 may be the same. Figure 2 and Figure 3The example shown is the configuration of the total expansion oil passage near the large end of the assembly hole 11.
[0073] Specifically, the width of the spiral oil groove 12 ranges from 1.6mm to 2mm. The depth of the spiral oil groove 12 ranges from 0.8mm to 0.85mm. The cross-section of the spiral oil groove 12 is arc-shaped, with a radius ranging from 0.5mm to 2.5mm. This design prevents damage to the flywheel flange 1 or the assembly shaft section 2 during the interference fit between the assembly shaft section 2 and the assembly hole 11.
[0074] More preferably, such as Figure 2 and Figure 3 As shown, along the radial direction of the flywheel flange 1, the depth of the first annular oil groove 13 is greater than the depth of the spiral oil groove 12. This arrangement allows for the rapid and efficient delivery of hydraulic oil to the two spiral expanding oil passages.
[0075] More preferably, the depth of the second annular oil groove 14 is equal to the depth of the spiral oil groove 12 along the radial direction of the flywheel flange 1. In other embodiments, the depth of the second annular oil groove 14 may also be greater than or less than the depth of the spiral oil groove 12. Figure 2 and Figure 3 The example provided is simply that the depth of the second annular oil groove 14 is greater than the depth of the spiral oil groove 12.
[0076] Specifically, such as Figure 1 and Figure 2 As shown, the flywheel flange 1 is also provided with an oil supply passage 15. One end of the oil supply passage 15 is connected to the first annular oil groove 13, and the other end of the oil supply passage 15 passes through one end face of the flywheel flange 1 and is used to connect with the hydraulic expansion assembly. This achieves connection between the first annular oil groove 13 and the hydraulic expansion assembly, and can effectively reduce the structural complexity of the positioning assembly 3 and the hydraulic expansion assembly, facilitating the assembly of the flywheel flange 1, the assembly shaft section 2, the positioning assembly 3 and the hydraulic expansion assembly, and facilitating the delivery of hydraulic oil to the main expansion oil passage. Specifically, as shown... Figure 2 As shown, an exemplary example is taken where the other end of the oil supply channel 15 passes through one end face of the flywheel flange 1 near the small end of the assembly hole 11. The specific structure of the hydraulic expansion assembly is prior art and will not be described further here.
[0077] The present invention also provides an auxiliary assembly device for assisting in the interference fit of the aforementioned flywheel flange 1 onto the assembly shaft section 2.
[0078] Specifically, in this embodiment, such as Figure 3 and Figure 4As shown, the auxiliary assembly device includes a positioning component 3, which includes a positioning plate 31 and a floating positioning element disposed on the positioning plate 31. The positioning plate 31 is detachably connected to the flywheel flange 1 and is in contact with one end face of the flywheel flange 1 near the small end of the assembly hole 11. The floating positioning element is configured to move relative to the positioning plate 31 along the axial direction of the assembly shaft section 2. The end face of the assembly shaft section 2 near the flywheel flange 1 along the axial direction is recessed with a first positioning groove 21. When the assembly shaft section 2 is inserted into the assembly hole 11, the floating positioning element can abut against the end face of the assembly shaft section 2 near the flywheel flange 1 along the axial direction, or be partially inserted into the first positioning groove 21. Specifically, when the flywheel flange 1 is to be interference-fitted onto the assembly shaft section 2, firstly, the flywheel flange 1 is partially fitted onto the assembly shaft section 2. Then, the positioning plate 31 is detachably connected to the flywheel flange 1, so that the positioning plate 31 is in contact with one end face of the flywheel flange 1 near the small end of the assembly hole 11, thereby limiting the relative position of the positioning plate 31 and the flywheel flange 1. It can be understood that at this time, the floating positioning element is pressed against the end face of the assembly shaft section 2 axially near the flywheel flange 1. Then, the positioning plate 31, the floating positioning element, and the flywheel flange 1 are rotated and / or moved relative to the assembly shaft section 2 as a whole. During the movement, the floating positioning component can be inserted into the first positioning groove 21. When the floating positioning component is partially inserted into the first positioning groove 21, it indicates that the central axis of the flywheel flange 1 is collinear with the central axis of the assembly shaft section 2, so as to complete the positioning of the relative position of the flywheel flange 1 and the assembly shaft section 2. The structure is simple and the operation is convenient. Thus, during the process of advancing the flywheel flange 1 and the assembly shaft section 2 along the axial direction of the assembly shaft section 2 to make an interference fit, it can effectively avoid scratching the inner peripheral wall of the assembly hole 11 and / or the outer peripheral wall of the assembly shaft section 2 caused by the non-collinearity of the central axis of the flywheel flange 1 and the central axis of the assembly shaft section 2.
[0079] It is understandable that, since both the assembly hole 11 and the assembly shaft section 2 are frustoconical, when the assembly shaft section 2 is inserted into the assembly hole 11 and the floating positioning component is partially inserted into the first positioning groove 21, it indicates that the central axis of the flywheel flange 1 is collinear with the central axis of the assembly shaft section 2, so that the relative position of the flywheel flange 1 and the assembly shaft section 2 can be positioned. Secondly, the floating positioning component can move relative to the positioning plate 31 along the axial direction of the assembly shaft section 2, so that if the floating positioning component is not inserted into the first positioning groove 21 during the process of positioning the relative position of the flywheel flange 1 and the assembly shaft section 2, the assembly shaft section 2 will not be damaged.
[0080] More specifically, such as Figure 3 and Figure 4As shown, the floating positioning component includes a first positioning pin 32 and an elastic element 33. The first positioning pin 32 is slidably inserted through the positioning plate 31, and the outer peripheral wall of the first positioning pin 32 is provided with a limiting edge 321. The elastic element 33 is sleeved on the first positioning pin 32 and limited between the positioning plate 31 and the limiting edge 321. The first positioning pin 32 can be inserted into the first positioning groove 21 along the axial part of the assembly shaft section 2, and the limiting edge 321 can abut against the end face of the assembly shaft section 2 that is close to the flywheel flange 1 along the axial direction. Specifically, when the relative position of the positioning plate 31 and the flywheel flange 1 is defined, the first positioning pin 32 abuts against the end face of the assembly shaft section 2 approaching the flywheel flange 1 along the axial direction, and the elastic element 33 is compressed; during the process of rotating and / or moving the positioning plate 31, the floating positioning element and the flywheel flange 1 as a whole relative to the assembly shaft section 2, when the first positioning pin 32 is moved to be directly opposite the first positioning groove 21, the first positioning pin 32 is inserted into the first positioning groove 21 under the action of the elastic restoring force of the elastic element 33, and the limiting edge 321 abuts against the end face of the assembly shaft section 2 approaching the flywheel flange 1 along the axial direction. At this time, the central axis of the flywheel flange 1 and the central axis of the assembly shaft section 2 are collinear, thus completing the positioning of the relative position of the flywheel flange 1 and the assembly shaft section 2.
[0081] More specifically, the first positioning pin 32 passes through the through hole of the positioning plate 31, and the two ends of the elastic member 33 are fixedly connected to the positioning plate 31 and the limiting edge 321, respectively. As an alternative, the floating positioning member also includes a positioning ring fixedly connected to the through hole of the positioning plate 31, with the first positioning pin 32 slidably passing through the positioning ring and the through hole, and the two ends of the elastic member 33 abutting or fixedly connected to the limiting edge 321 and the positioning ring, respectively. Both methods enable the first positioning pin 32 to slide through the positioning plate 31.
[0082] Preferably, there are multiple floating positioning elements, which are distributed at intervals along the circumference of the positioning plate 31. In this embodiment, as shown... Figure 3 and Figure 4 As shown, an example is set with two floating positioning components.
[0083] More preferably, in this embodiment, the elastic element 33 is a spring. In other embodiments, the elastic element 33 may also be a rubber sleeve, etc.
[0084] More specifically, such as Figure 1 and Figure 3As shown, the positioning assembly 3 also includes multiple second positioning pins 34, a multiple second positioning groove is recessed in the positioning plate 31, and a multiple third positioning groove 16 is recessed on the end face of the flywheel flange 1 near the positioning plate 31. The multiple second positioning pins 34, the multiple second positioning grooves, and the multiple third positioning grooves 16 are all correspondingly arranged, and the multiple third positioning grooves 16 are distributed at intervals along the circumference of the flywheel flange 1. The two ends of the second positioning pins 34 are respectively inserted into the second positioning grooves and the third positioning grooves 16. This arrangement allows for a detachable connection between the positioning plate 31 and the flywheel flange 1, and also limits the relative position of the positioning plate 31 and the flywheel flange 1. In this embodiment, as... Figure 1 and Figure 3 As shown, an example is provided by setting two second positioning pins 34, two second positioning slots and two third positioning slots 16.
[0085] Specifically, the auxiliary assembly device also includes a drive assembly. The output end of the drive assembly is connected to the positioning assembly 3 and can drive the positioning assembly to move axially along the flywheel flange 1. Specifically, the output end of the drive assembly is connected to the positioning plate 31. The drive assembly drives the positioning plate 31 to move axially along the assembly shaft segment 2, thereby driving the flywheel flange 1 to move synchronously along the axial direction of the assembly shaft segment 2, so that the inner peripheral wall of the assembly hole 11 and the outer peripheral wall of the assembly shaft segment 2 can be initially fitted circumferentially, and the flywheel flange 1 and the assembly shaft segment 2 can be pressed into place with interference fit. The specific structure of the drive assembly is not limited, and the connection method between the output end of the drive assembly and the positioning plate 31 is not limited, as long as it can drive the positioning assembly 3 to move axially along the assembly shaft segment 2.
[0086] More specifically, the auxiliary assembly device also includes a controller, and the drive assembly and the hydraulic expansion assembly are all electrically connected to the controller. The controller can control the operation of the drive assembly and the hydraulic expansion assembly.
[0087] It is understandable that other types of positioning components 3 can also be used. The central axis of the flywheel flange 1 can be adjusted to be collinear with the central axis of the assembly shaft section 2, and the flywheel flange 1 can be driven to move axially through the drive component and the positioning component 3, so that the inner peripheral wall of the assembly hole 11 and the outer peripheral wall of the assembly shaft section 2 can be initially fitted circumferentially, and the assembly shaft section 2 and the assembly hole 11 can be interference-fitted into place.
[0088] Currently, the main existing technology uses hydraulic press-fitting to interference fit the assembly shaft section and flywheel flange. This method first positions the assembly shaft section and flywheel flange relative to each other using a positioning component. Then, the flywheel flange is expanded radially in one go using hydraulic pressure to produce a slight deformation. Finally, a drive component pushes the flywheel flange axially in one go, allowing for interference fit. However, this assembly method relies on empirical values for both radial and axial forces. This can lead to unreasonable application of these forces, causing the flywheel flange to be pushed axially before its assembly hole has fully expanded. Furthermore, pushing the flywheel flange axially to the intended assembly position in one go can easily scratch the inner wall of the assembly hole and / or the outer wall of the assembly shaft section, increasing the scrap rate of the flywheel flange and / or crankshaft.
[0089] Therefore, this invention also provides an adaptive assembly method, such as... Figure 5 and Figure 6 As shown, this adaptive assembly method is used to interference fit the assembly shaft segment 2 with the assembly hole 11. By using this adaptive assembly method to interference fit the assembly shaft segment 2 with the assembly hole 11, the phenomenon of scratching the inner peripheral wall of the assembly hole 11 and / or the outer peripheral wall of the assembly shaft segment 2 can be effectively avoided, and the assembly quality, assembly precision and accuracy of interference fitting the assembly shaft segment 2 with the assembly hole 11 can be effectively improved.
[0090] Specifically, such as Figure 5 and Figure 6 As shown, the adaptive assembly method includes:
[0091] S100, fix the crankshaft in position and make the inner peripheral wall of the assembly hole 11 initially fit with the outer peripheral wall of the assembly shaft section 2 in the circumferential direction.
[0092] Specifically, step S100 includes:
[0093] S110, Fixed crankshaft setting position.
[0094] It is understandable that once the crankshaft's position is fixed, the position of assembly shaft section 2 is simultaneously fixed. The specific structure for fixing the crankshaft's position is existing technology and will not be elaborated upon here.
[0095] S120. The center axis of the flywheel flange 1 is positioned collinear with the center axis of the assembly shaft section 2 by the positioning component 3.
[0096] Specifically, step S120 includes:
[0097] S121. Assemble the positioning component 3 and the flywheel flange 1 into a whole.
[0098] S122. The flywheel flange 1 is fitted onto the assembly shaft section 2, and the first locating pin 32 is adjusted to be inserted into the first locating groove 21. Specifically, by rotating and / or moving the locating assembly 3 and the flywheel flange 1 as a whole, the first locating pin 32 is inserted into the first locating groove 21. It can be understood that when the first locating pin 32 is inserted into the first locating groove 21, the central axis of the flywheel flange 1 is collinear with the central axis of the assembly shaft section 2.
[0099] S130. The initial axial force is applied to the positioning component 3 by the driving component, which drives the flywheel flange 1 to move axially, so that the inner peripheral wall of the assembly hole 11 and the outer peripheral wall of the assembly shaft section 2 are initially fitted together circumferentially.
[0100] Specifically, the initial axial force and the specifications of flywheel flange 1 are used to form a first table. The initial axial force is obtained from the first table based on the specifications of flywheel flange 1. The initial axial force in the first table is an empirical value obtained from a large number of previous tests.
[0101] Preferably, during the process of applying an initial axial force to the positioning component 3 through the drive component to drive the flywheel flange 1 to move axially, so that the inner peripheral wall of the assembly hole 11 and the outer peripheral wall of the assembly shaft section 2 are initially fitted together circumferentially, the controller controls the force applied by the drive component to the positioning component 3 to gradually increase from zero to the initial axial force.
[0102] S200, the radial force applied to the inner peripheral wall of the assembly hole 11 is increased by hydraulic expansion. Preferably, the radial force applied to the inner peripheral wall of the assembly hole 11 is gradually increased.
[0103] Specifically, hydraulic oil is injected into the oil tank to apply a radial force to the inner peripheral wall of the mounting hole 11. The radial force applied to the inner peripheral wall of the mounting hole 11 is less than or equal to the maximum allowable radial force of the flywheel flange 1. This ensures that the structure of the flywheel flange 1 is not damaged throughout the entire process of applying the radial force to the inner peripheral wall of the mounting hole 11.
[0104] Specifically, in this embodiment, the controller controls the hydraulic expansion assembly to deliver hydraulic oil into the oil delivery passage 15, so that the hydraulic oil flows to the main expansion passage. Specifically, the hydraulic oil flows sequentially through the first annular expansion passage, two spiral expansion passages, and two second annular expansion passages of the main expansion passage, so that a radial force can be applied to the inner peripheral wall of the mounting hole 11, thereby allowing the mounting hole 11 of the flywheel flange 1 to be expanded.
[0105] S300. Determine whether the assembly hole 11 of the flywheel flange 1 has been expanded to the expected state.
[0106] Specifically, the applied radial force can be calculated based on the flow rate of hydraulic oil supplied from the hydraulic expansion assembly to the main expansion oil passage. The specific calculation method for obtaining the applied radial force is prior art and will not be elaborated here.
[0107] Specifically, step S300 includes:
[0108] S310. Obtain the current actual radial force between the inner peripheral wall of the assembly hole 11 and the outer peripheral wall of the assembly shaft segment 2.
[0109] Specifically, a pressure sensor is provided between the inner peripheral wall of the assembly hole 11 and the outer peripheral wall of the assembly shaft section 2. The pressure sensor can monitor the current actual radial force between the inner peripheral wall of the assembly hole 11 and the outer peripheral wall of the assembly shaft section 2 in real time. The pressure sensor is electrically connected to the controller, and the controller can acquire the electrical signal emitted by the pressure sensor.
[0110] S320. Determine whether the assembly hole 11 of the flywheel flange 1 has been expanded to the expected state based on the difference between the currently applied radial force and the current actual radial force.
[0111] Specifically, step S320 includes:
[0112] Determine whether (currently applied radial force - current actual radial force) is greater than a first set difference. The first set difference is the critical difference that allows an oil drain gap to be generated between the inner peripheral wall of the assembly hole 11 and the outer peripheral wall of the assembly shaft section 2.
[0113] If (currently applied radial force - current actual radial force) is greater than the first set difference, then the mounting hole 11 of the flywheel flange 1 will be expanded to the expected state. Then step S400 will be executed.
[0114] Understandably, if (currently applied radial force - current actual radial force) is greater than the first set difference, it indicates that the assembly hole 11 has been expanded to the point where an oil drain gap is created between the inner peripheral wall of the assembly hole 11 and the outer peripheral wall of the assembly shaft section 2. Hydraulic oil can then be depressurized and flow away through this gap, indicating that the assembly hole 11 of the flywheel flange 1 has been expanded to the expected state. Then, step S400 is executed. During the process of hydraulic oil depressurizing and flowing away through the gap between the inner peripheral wall of the assembly hole 11 and the outer peripheral wall of the assembly shaft section 2, both the inner peripheral wall of the assembly hole 11 and the outer peripheral wall of the assembly shaft section 2 are simultaneously further lubricated.
[0115] If (currently applied radial force - current actual radial force) is less than or equal to the first set difference, then the mounting hole 11 of the flywheel flange 1 has not been expanded to the expected state. Then return to step S200.
[0116] Understandably, if (currently applied radial force - current actual radial force) is less than or equal to the first set difference, it indicates that the assembly hole 11 has not been expanded to the point where an oil drain gap is formed between the inner peripheral wall of the assembly hole 11 and the outer peripheral wall of the assembly shaft section 2. Then, return to step S200. This process continues until the assembly hole 11 of the flywheel flange 1 is expanded to the expected state. Then, proceed to step S400.
[0117] Specifically, the first set difference and the specifications of flywheel flange 1 form a second table. The first set difference is obtained from the second table using the specifications of flywheel flange 1. The first set difference in the second table is an empirical value obtained from numerous prior experiments.
[0118] S400, control the increase of the axial force applied to the flywheel flange 1 by a set step size. The set step size is less than or equal to the critical step size that will not scratch the inner peripheral wall of the mounting hole 11 and the outer peripheral wall of the mounting shaft section 2.
[0119] The preferred control is to gradually increase the axial force applied to the flywheel flange 1 by setting a step size.
[0120] Specifically, by increasing the force applied by the drive assembly to the positioning assembly 3, the axial force applied to the flywheel flange 1 is increased.
[0121] The step size is set as an empirical value obtained from a large number of previous experiments.
[0122] S500, Determine whether the flywheel flange 1 has been pushed axially to the expected state.
[0123] Specifically, step S500 includes:
[0124] S510, Obtain the current actual radial force between the inner peripheral wall of the assembly hole 11 and the outer peripheral wall of the assembly shaft segment 2.
[0125] S520. Determine whether the flywheel flange 1 has been axially advanced to the expected state based on the difference between the currently applied radial force and the current actual radial force.
[0126] Specifically, step S520 includes:
[0127] Determine whether (currently applied radial force - current actual radial force) is greater than a first set difference. The first set difference is the critical difference that allows an oil drain gap to be generated between the inner peripheral wall of the assembly hole 11 and the outer peripheral wall of the assembly shaft section 2.
[0128] If (currently applied radial force - current actual radial force) is greater than the first set difference, then the flywheel flange 1 has not been pushed axially to the expected state. Return to step S400.
[0129] Understandably, if (currently applied radial force - current actual radial force) is greater than the first set difference, it indicates that the flywheel flange 1 has not been pushed into place axially. There is still an oil drain gap between the inner circumferential wall of the assembly hole 11 and the outer circumferential wall of the assembly shaft section 2. Hydraulic oil can be depressurized and flow away through this gap, indicating that the flywheel flange 1 has not been pushed into the expected state axially. Then, return to step S400.
[0130] If (currently applied radial force - current actual radial force) is less than or equal to the first set difference, then the flywheel flange 1 is advanced axially to the expected state. Then step S600 is executed.
[0131] It is understandable that if (currently applied radial force - current actual radial force) is less than or equal to the first set difference, it indicates that the flywheel flange 1 has been pushed into place axially, the gap between the inner peripheral wall of the assembly hole 11 and the outer peripheral wall of the assembly shaft section 2 is less than the oil drain gap, and the gap between the inner peripheral wall of the assembly hole 11 and the outer peripheral wall of the assembly shaft section 2 is insufficient to allow the hydraulic oil to be depressurized and flow away.
[0132] S600, Determine whether the assembly shaft section 2 and the assembly hole 11 are properly interference-fitted.
[0133] Specifically, step S600 includes:
[0134] S610. Obtain the actual amount of axial advancement of the flywheel flange 1 from its initial position. The initial position is the position of the flywheel flange 1 along its axial direction when the inner peripheral wall of the assembly hole 11 and the outer peripheral wall of the assembly shaft section 2 are initially fitted together circumferentially.
[0135] Specifically, the actual amount of axial movement of the flywheel flange 1 from its initial position is monitored in real time by a displacement sensor; the displacement sensor is electrically connected to the controller, and the controller can receive the electrical signals emitted by the displacement sensor.
[0136] S620. Determine whether the assembly shaft section 2 and the assembly hole 11 are properly interference-fitted based on the actual and theoretical propulsion amounts.
[0137] Step S620 includes:
[0138] Determine whether the absolute value of the difference between the actual propulsion and the theoretical propulsion is less than or equal to a second set difference. The second set difference is an allowable value obtained through simulation calculation.
[0139] If the absolute value of the difference between the actual propulsion amount and the theoretical propulsion amount is less than or equal to the second set difference, then the assembly shaft section 2 and the assembly hole 11 are interference-fitted into place.
[0140] If the absolute value of the difference between the actual propulsion amount and the theoretical propulsion amount is greater than the second set difference, then the assembly shaft segment 2 and the assembly hole 11 are not properly interference-fitted. Then return to step S200. Continue until the assembly shaft segment 2 and the assembly hole 11 are properly interference-fitted.
[0141] Specifically, after controlling and increasing the radial force applied to the inner circumferential wall of the assembly hole 11, it is checked whether the assembly hole 11 of the flywheel flange 1 has been expanded to the expected state. If the assembly hole 11 of the flywheel flange 1 has not been expanded to the expected state, the radial force applied to the inner circumferential wall of the assembly hole 11 is adaptively increased until the assembly hole 11 of the flywheel flange 1 is expanded to the expected state. It can be understood that control is only applied after the assembly hole 11 of the flywheel flange 1 has been expanded to the expected state, that is, after the assembly hole 11 has been fully expanded. The axial force applied to the flywheel flange 1 is increased, causing the flywheel flange 1 to be pushed axially. In controlling the increase of the axial force applied to the flywheel flange 1, the axial force applied to the flywheel flange 1 is increased by a set step size. The set step size is less than or equal to the critical step size that will not scratch the inner peripheral wall of the mounting hole 11 and the outer peripheral wall of the mounting shaft section 2. Therefore, each time the axial force applied to the flywheel flange 1 is increased, the flywheel flange 1 can only move a certain distance axially, and the distance moved will not cause scratches on the inner peripheral wall of the mounting hole 11 and the outer peripheral wall of the mounting shaft section 2.
[0142] Secondly, after increasing the axial force applied to the flywheel flange 1, it is checked whether the flywheel flange 1 has been pushed axially to the expected state. If the flywheel flange 1 has not been pushed axially to the expected state, the axial force applied to the flywheel flange 1 is adaptively increased by a set step size until the flywheel flange 1 is pushed axially to the expected state. Only when the flywheel flange 1 is pushed axially to the expected state is the push of the flywheel flange 1 considered complete. Then, it is determined whether the assembly shaft segment 2 and the assembly hole 11 are interference-fitted in the axial direction. If the assembly shaft segment 2 and the assembly hole 11 are not interference-fitted in the axial direction, the process returns to step S200 until it is determined that the assembly shaft segment 2 and the assembly hole 11 are interference-fitted in the axial direction. This allows the assembly hole 11 to be radially expanded and the flywheel flange 1 to be axially pushed multiple times through a closed-loop and adaptive method until the assembly shaft segment 2 and the assembly hole 11 are interference-fitted in the axial direction.
[0143] This effectively avoids scratching the inner peripheral wall of the assembly hole 11 and / or the outer peripheral wall of the assembly shaft section 2, and effectively improves the assembly quality, assembly precision and accuracy of the interference fit between the assembly shaft section 2 and the assembly hole 11.
[0144] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art will be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.
Claims
1. An adaptive assembly method, wherein an engine crankshaft assembly includes a flywheel flange (1) and a crankshaft, the flywheel flange (1) having a frustum-shaped assembly hole (11), and the crankshaft having a frustum-shaped assembly shaft section (2); characterized in that, The adaptive assembly method is used to interference fit the assembly shaft segment (2) with the assembly hole (11), and the adaptive assembly method includes: S100. Fix the setting position of the crankshaft and make the inner peripheral wall of the assembly hole (11) and the outer peripheral wall of the assembly shaft section (2) initially fit together in the circumferential direction. S200, The radial force applied to the inner peripheral wall of the assembly hole (11) is increased by means of hydraulic expansion; S300. Determine whether the assembly hole (11) of the flywheel flange (1) has been expanded to the expected state. If not, return to step S200; If so, proceed to step S400; S400, control the increase of the axial force applied to the flywheel flange (1) by a set step size; wherein the set step size is less than or equal to the critical step size that does not scratch the inner peripheral wall of the mounting hole (11) and the outer peripheral wall of the mounting shaft section (2); S500, Determine whether the flywheel flange (1) has been pushed axially to the expected state; If not, return to step S400; If so, proceed to step S600; S600, Determine whether the assembly shaft section (2) and the assembly hole (11) are properly interference-fitted; If not, return to step S200; Step S300 includes: S310. Obtain the current actual radial force between the inner peripheral wall of the assembly hole (11) and the outer peripheral wall of the assembly shaft segment (2); S320. Determine whether the assembly hole (11) of the flywheel flange (1) is expanded to the expected state based on the difference between the currently applied radial force and the current actual radial force. Step S500 includes: S510. Obtain the current actual radial force between the inner peripheral wall of the assembly hole (11) and the outer peripheral wall of the assembly shaft segment (2); S520. Determine whether the flywheel flange (1) is axially advanced to the expected state based on the difference between the currently applied radial force and the current actual radial force.
2. The adaptive assembly method according to claim 1, characterized in that, An oil groove is recessed in one of the inner peripheral wall of the assembly hole (11) and the outer peripheral wall of the assembly shaft section (2); A radial force is applied to the inner peripheral wall of the assembly hole (11) by injecting hydraulic oil into the oil tank; wherein the radial force applied to the inner peripheral wall of the assembly hole (11) is less than or equal to the maximum allowable radial force of the flywheel flange (1).
3. The adaptive assembly method according to claim 1, characterized in that, Step S320 includes: Determine whether (currently applied radial force - current actual radial force) is greater than a first set difference; wherein, the first set difference is the critical difference between the inner peripheral wall of the assembly hole (11) and the outer peripheral wall of the assembly shaft section (2) that can generate an oil drain gap; If (currently applied radial force - current actual radial force) is greater than the first set difference, then the assembly hole (11) of the flywheel flange (1) is expanded to the expected state. If (currently applied radial force - current actual radial force) is less than or equal to the first set difference, then the mounting hole (11) of the flywheel flange (1) is not expanded to the expected state.
4. The adaptive assembly method according to claim 1, characterized in that, Step S520 includes: Determine whether (currently applied radial force - current actual radial force) is greater than a first set difference; wherein, the first set difference is the critical difference between the inner peripheral wall of the assembly hole (11) and the outer peripheral wall of the assembly shaft section (2) that can generate an oil drain gap; If (currently applied radial force - current actual radial force) is greater than the first set difference, then the flywheel flange (1) is not pushed axially to the expected state in this instance; If (currently applied radial force - current actual radial force) is less than or equal to the first set difference, then the flywheel flange (1) is axially advanced to the expected state.
5. The adaptive assembly method according to any one of claims 1-4, characterized in that, Step S600 includes: S610. Obtain the actual amount of axial advancement of the flywheel flange (1) from the initial position; wherein, the initial position is the position of the flywheel flange (1) along the axial direction when the inner peripheral wall of the assembly hole (11) and the outer peripheral wall of the assembly shaft section (2) are initially fitted together in the circumferential direction. S620. Determine whether the assembly shaft section (2) and the assembly hole (11) are interference-fitted into place based on the actual propulsion amount and the theoretical propulsion amount.
6. The adaptive assembly method according to claim 5, characterized in that, Step S620 includes: Determine whether the absolute value of the difference between the actual propulsion amount and the theoretical propulsion amount is less than or equal to a second preset difference; If the absolute value of the difference between the actual propulsion amount and the theoretical propulsion amount is less than or equal to the second set difference, then the assembly shaft segment (2) and the assembly hole (11) are interference-fitted into place; If the absolute value of the difference between the actual propulsion amount and the theoretical propulsion amount is greater than the second set difference value, then the assembly shaft segment (2) and the assembly hole (11) are not interference-fitted into place.
7. The adaptive assembly method according to any one of claims 1-4, wherein the auxiliary assembly device comprises a positioning component (3) and a driving component, the positioning component (3) being able to adjust the central axis of the flywheel flange (1) to be collinear with the central axis of the assembly shaft segment (2), and the output end of the driving component being connected to the positioning component (3) and being able to drive the positioning component (3) to move axially along the flywheel flange (1); characterized in that, Step S100 includes: S110. Fix the setting position of the crankshaft; S120. Position the central axis of the flywheel flange (1) to be collinear with the central axis of the assembly shaft section (2) using the positioning component (3); S130. The drive assembly applies an initial axial force to the positioning assembly (3) to drive the flywheel flange (1) to move axially, so that the inner peripheral wall of the assembly hole (11) and the outer peripheral wall of the assembly shaft section (2) are initially fitted together circumferentially.
8. An engine crankshaft assembly, comprising the flywheel flange (1) and the crankshaft, wherein the flywheel flange (1) has a frustum-shaped mounting hole (11) and the crankshaft has a frustum-shaped mounting shaft section (2), characterized in that, The adaptive assembly method according to any one of claims 1-7 is used to interference fit the assembly shaft segment (2) with the assembly hole (11) in place.