A drive shaft assembly system and method

Abstract

The present application relates to the technical field of transmission shaft, and in particular to a transmission shaft assembling system and method. The down-pressing assembly comprises a down-pressing unit and a side positioning unit. The rotating assembly comprises a first rotating unit and a second rotating unit. The transmission shaft comprises a shaft unit and a universal unit. The assembling state of the transmission shaft assembling system comprises that one end of the shaft unit is in abutment with the base unit, the other end is in abutment with the universal unit, part of the outer peripheral wall of the shaft unit is in abutment with the groove bottom of the side positioning groove, the first rotating unit and the second rotating unit jointly drive the shaft unit to rotate so that the spline shaft at one end of the shaft unit is aligned with the spline hole of the universal unit. Thus, the problem that the spline shaft section and the spline hole are difficult to accurately align is solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of transmission shaft, in particular to a transmission shaft assembly system and method. BACKGROUND

[0002] In the mechanical transmission system, the driving shaft is the core component to realize power transmission, which is usually matched with the spline structure to ensure the stability and accuracy of transmission. The existing transmission structure is mainly composed of a driving shaft body, a spline shaft segment arranged at one end of the driving shaft, a spline hole component matched with the spline shaft segment, and a groove body matching structure with a groove bottom. Among them, the groove bottom of the groove body matching structure is the key reference surface during the rotation of the driving shaft. Its core role is to provide a positioning reference for the alignment of the spline shaft segment and the spline hole when the driving shaft and the groove bottom are in abutting action during the assembly of the driving shaft and the spline hole component. Only when the driving shaft reliably abuts against the groove bottom during rotation, the tooth structure of the spline shaft segment can be accurately aligned with the tooth groove structure of the spline hole, thereby ensuring that the spline shaft and the spline hole can be smoothly aligned and inserted, completing the assembly of the entire transmission structure and ensuring the effectiveness of subsequent power transmission.

[0003] The existing driving form has obvious alignment accuracy defects in actual application. The fundamental reason is that during the rotation of the driving shaft and the approach to the spline hole component to realize alignment, the existing driving form cannot limit the unintended relative movement of the driving shaft along the groove bottom surface, resulting in unstable abutting state of the driving shaft and the groove bottom, insufficient spline alignment accuracy, and affecting the assembly efficiency and transmission reliability. SUMMARY

[0004] To solve the problem of difficult accurate alignment of the spline shaft segment and the spline hole, the present application provides a transmission shaft assembly system, comprising:

[0005] a base unit;

[0006] a pressing assembly, comprising a pressing unit and a side positioning unit; the pressing unit is arranged on the side of the side positioning unit away from the base unit; the side positioning unit comprises a side positioning plate and a side positioning groove; the side positioning groove is recessed from the first side of the side positioning plate, forming a groove with one side opening;

[0007] a rotating assembly, comprising a first rotating unit and a second rotating unit; the first rotating unit and the second rotating unit are arranged between the side positioning plate and the base unit;

[0008] a transmission shaft, comprising a shaft unit and a universal unit;

[0009] The assembly state of the transmission shaft assembly system includes that one end of the shaft unit abuts against the base unit, the other end abuts against the universal unit, part of the outer peripheral wall of the shaft unit abuts against the groove bottom of the side positioning groove, the first rotating unit and the second rotating unit jointly drive the shaft unit to rotate to align the spline shaft at one end of the shaft unit with the spline hole of the universal unit; wherein the driving force of the second rotating unit driving the shaft unit to rotate is greater than the driving force of the first rotating unit driving the shaft unit to rotate; the abutting part of the second rotating unit abutting against the shaft unit and the abutting part of the first rotating unit abutting against the shaft unit are respectively arranged on the two sides of the shaft unit; and the abutting part of the second rotating unit abutting against the shaft unit is arranged on the side of the shaft unit close to the first side.

[0010] In some embodiments, the first rotating unit includes a fourth driving part, a first rubbing block and a first flexible block; the fourth driving part is in driving connection with the first rubbing block; the first flexible block is connected on the side of the first rubbing block close to the shaft unit; the second rotating unit includes a fifth driving part, a second rubbing block and a second flexible block; the fifth driving part is in driving connection with the second rubbing block; the second flexible block is connected on the side of the second rubbing block close to the shaft unit; and the first rubbing block and the second rubbing block are respectively arranged between the side positioning plate and the base unit.

[0011] The assembly state further includes that the first flexible block and the second flexible block jointly drive the shaft unit to rotate to align the spline shaft at one end of the shaft unit with the spline hole of the universal unit; wherein the deformation amount of the second flexible block is greater than the deformation amount of the first flexible block, the driving force of the second flexible block driving the shaft unit to rotate is greater than the driving force of the first flexible block driving the shaft unit to rotate; the abutting part of the second flexible block abutting against the shaft unit and the abutting part of the first flexible block abutting against the shaft unit are respectively arranged on the two sides of the shaft unit; and the abutting part of the second flexible block abutting against the shaft unit is arranged on the side of the shaft unit close to the first side.

[0012] In some embodiments, the minimum distance A between the side of the second rubbing block close to the shaft unit and the central axis of the shaft unit gradually decreases along a first set direction; wherein the first set direction is tangent to the circumferential direction of the shaft unit.

[0013] The assembly state further includes that the second rubbing block moves along the first set direction to make the first flexible block and the second flexible block jointly drive the shaft unit to rotate to align the spline shaft at one end of the shaft unit with the spline hole of the universal unit.

[0014] In some embodiments, the minimum distance B between the first winding block and the central axis of the shaft unit gradually decreases along a second set direction, wherein the second set direction is opposite to the first set direction.

[0015] The assembled state further includes that the first winding block moves along the second set direction, and the second flexible block and the first flexible block jointly drive the shaft unit to rotate, so that the spline shaft at one end of the shaft unit is aligned with the spline hole of the universal unit.

[0016] In some embodiments, the pressing assembly further includes a side clamping unit, wherein the side clamping unit is arranged on the side positioning plate away from the first rotating unit.

[0017] The assembled state further includes that the side clamping unit fixes the relative position of the universal unit and the pressing assembly.

[0018] In some embodiments, the base unit includes a base body, a positioning hole, and a first elastic body, wherein the base body is arranged on the first rotating unit away from the pressing unit, the positioning hole is recessed from the base body towards the other side, and the first elastic body is arranged in the positioning hole, and the maximum elastic force of the first elastic body is greater than the weight of the shaft unit.

[0019] The assembled state further includes that one end of the shaft unit is arranged in the positioning hole, and the first elastic body abuts against the shaft unit to move the spline shaft to a first state, wherein the first state includes that the spline shaft at one end close to the pressing unit abuts against the spline hole close to the base body.

[0020] In some embodiments, the transmission shaft assembly system includes a base assembly, wherein the base assembly includes the base unit and a second elastic body, the second elastic body is connected to the base body away from the pressing unit, the second elastic body is drivingly connected to the base body, and the maximum driving force of the second elastic body is greater than the maximum elastic force of the first elastic body.

[0021] The assembled state further includes that the first rotating unit and the second rotating unit jointly drive the shaft unit to rotate, so that the spline shaft at one end of the shaft unit is aligned with the spline hole of the universal unit, and the second elastic body and the first elastic body jointly drive the spline shaft to move to a second state through the base body, wherein the second state includes that the outer circumferential surface of the spline shaft partially overlaps with the inner circumferential surface of the spline hole.

[0022] In some embodiments, the base assembly of the transmission shaft assembly system further comprises a sliding unit; the sliding unit comprises a third guide rail and a third sliding block; the third sliding block is in sliding connection with the third guide rail and moves along the direction of the central axis of the spline shaft; the third sliding block is connected with the base unit.

[0023] In some embodiments, based on the positioning being completed, the first rotating unit and the second rotating unit jointly drive the shaft unit to rotate around the central axis of the shaft unit; wherein the positioning being completed comprises the spline shaft of the shaft unit abutting against the spline hole of the universal unit.

[0024] Based on the shaft unit being rotated to the spline shaft at one end of the shaft unit being aligned with the spline hole of the universal unit, the first rotating unit and the second rotating unit stop driving; wherein the driving force of the second rotating unit for driving the shaft unit to rotate is greater than the driving force of the first rotating unit for driving the shaft unit to rotate; the abutting part of the second rotating unit abutting against the shaft unit and the abutting part of the first rotating unit abutting against the shaft unit are respectively arranged on the two sides of the shaft unit; the abutting part of the second rotating unit abutting against the shaft unit is arranged on the side of the shaft unit close to the first side.

[0025] Based on the first rotating unit and the second rotating unit stopping driving, the pressing unit drives the universal unit to move towards the direction of the week unit to a completed assembly state; wherein the completed assembly state comprises the area of the spline shaft abutting against the spline hole being greater than or equal to a set value.

[0026] In some embodiments, based on the positioning being completed, the first rotating unit and the second rotating unit jointly drive the shaft unit to rotate around the central axis of the shaft unit comprises:

[0027] Based on the positioning being completed, the second rotating unit moves to drive the shaft unit to rotate around the central axis of the shaft unit;

[0028] The first rotating unit and the second rotating unit jointly move to drive the shaft unit to rotate around the central axis of the shaft unit.

[0029] To solve the problem that the spline shaft segment and the spline hole are difficult to accurately align, the present application has the following advantages:

[0030] By setting the rotating assembly (including the first rotating unit, the second rotating unit), and the driving force of the second rotating unit driving the shaft unit rotation is greater than the driving force of the first rotating unit driving the shaft unit rotation, the abutting part of the second rotating unit abutting the shaft unit is set on the side of the shaft unit close to the first side of the side positioning plate, and at the same time, the outer peripheral wall of the shaft unit part of the transmission shaft abuts the bottom of the side positioning groove of the side positioning unit (including the side positioning plate and the side positioning groove), the second rotating unit can provide the force in the direction close to the bottom of the side positioning groove for the shaft unit, preventing the shaft unit from separating from the side positioning groove, and the first rotating unit and the second rotating unit jointly drive the shaft unit to rotate, so that the shaft unit always stably abuts the bottom of the side positioning groove during rotation, ensuring that the spline shaft at one end of the shaft unit is accurately aligned with the spline hole of the universal unit, finally solving the problem that the shaft and the groove bottom are easily relatively moved and cannot be accurately aligned in the existing driving form, and ensuring the assembly reliability of the transmission shaft assembly system. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 A first perspective view of a transmission shaft assembly system according to an embodiment is shown;

[0032] Figure 2 A second perspective view of a transmission shaft assembly system according to an embodiment is shown;

[0033] Figure 3 A third perspective view of a transmission shaft assembly system according to an embodiment is shown;

[0034] Figure 4 A fourth perspective view of a transmission shaft assembly system according to an embodiment is shown;

[0035] Figure 5 A schematic view of a transmission shaft according to an embodiment is shown;

[0036] Figure 6 A partial view of a transmission shaft according to an embodiment is shown.

[0037] 10 base assembly; 11 machine base; 12 base unit; 121 base body; 122 positioning hole; 123 first elastic body; 13 second elastic body; 14 sliding unit; 141 third guide rail; 142 third sliding block; 20 pressing assembly; 21 pressing unit; 211 pressing seat; 212 first driving part; 213 pressing head; 22 side clamping unit; 221 first clamping head; 222 second driving part; 223 second clamping head; 224 third driving part; 23 side positioning unit; 231 side positioning plate; 232 side positioning groove; 24 supporting seat; 30 rotating assembly; 31 first rotating unit; 311 fourth driving part; 312 first rubbing block; 313 first flexible block; 314 first guide rail; 315 first sliding block; 32 second rotating unit; 321 fifth driving part; 322 second rubbing block; 323 second flexible block; 324 second guide rail; 325 second sliding block; 40 transmission shaft; 41 shaft unit; 411 shaft body; 412 connecting shaft; 413 spline shaft; 42 universal unit; 421 star-shaped sleeve; 422 rolling body; 423 retainer; 424 outer shell; 43 protective sleeve. DETAILED DESCRIPTION

[0038] The present disclosure will now be discussed with reference to several example embodiments. It should be appreciated that these embodiments are discussed only to better illustrate the present disclosure and are not intended to limit the scope of the present disclosure in any way.

[0039] As used herein, the term "includes" and its variants are to be read as open-ended terms that mean "including, but not limited to." The term "based on" is to be construed as "based at least in part on." The terms "one embodiment" and "an embodiment" are to be read as "at least one embodiment." The term "another embodiment" is to be read as "at least one other embodiment." The terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "vertical," "horizontal," "lateral," "longitudinal," and similar terms are used for orientation or positional relationships based on the orientation or position as shown in the drawings. These terms are used merely for purposes of description and are not intended to limit the indicated device, element, or component to a particular position, orientation, or configuration, unless otherwise indicated. Moreover, these terms are used in conjunction with the terms "abutting," "adjoining," "attached," "connected," "engaged," "interfacing," and similar terms to describe a relationship between or among devices, elements, or components, unless otherwise indicated. These terms are used in their broadest context, and are not meant to be limited to a single reference unless otherwise indicated. The terms "mounting," "positioning," "provisioned with," "connected," and "linked" are to be interpreted broadly. For example, a device, element, or component can be fixedly connected, removably connected, or integrally formed; it can be connected mechanically, electrically, or by means of an intermediary; and it can be directly connected, or connected through intervening devices, elements, or components, or internal connections between two devices, elements, or components. The terms "first," "second," and the like are used to distinguish different devices, elements, or components, and do not necessarily indicate relative importance or quantity unless otherwise indicated. The term "plurality" means two or more, unless otherwise indicated.

[0040] In the assembly process of the transmission shaft 40 assembly system, the shaft unit 41 is abutted with the base unit 12 at one end and the universal unit 42 at the other end, and part of the outer wall of the shaft unit 41 is abutted with the bottom of the side positioning groove 232 of the side positioning unit 23, and the first rotating unit 31 and the second rotating unit 32 of the rotating assembly 30 are used to drive the shaft unit 41 to rotate, so that the spline shaft 413 at one end of the shaft unit 41 is aligned with the spline hole of the universal unit 42. However, in the existing driving form, the relative position between the shaft unit 41 and the bottom of the side positioning groove 232 is not effectively constrained, so that the shaft unit 41 is prone to relative movement with the bottom of the side positioning groove 232 during the driving and rotating process of the first rotating unit 31 and the second rotating unit 32, and the abutted state between part of the outer wall of the shaft unit 41 and the bottom of the side positioning groove 232 cannot be continuously maintained, thereby causing the spline shaft 413 at one end of the shaft unit 41 to be difficult to accurately align with the spline hole of the universal unit 42.

[0041] Embodiment one: the embodiment discloses a transmission shaft 40 assembling system, like Figure 1 As shown, the transmission shaft 40 assembling system includes a base unit 12, a rotating assembly 30 and a transmission shaft 40. The base unit 12 provides a stable mounting base and support carrier for each component of the transmission shaft 40 assembling system, ensuring the structural stability of the entire system during assembly.

[0042] The pressing assembly 20 includes a pressing unit 21 and a side positioning unit 23. The pressing unit 21 is arranged on the side of the side positioning unit 23 away from the base unit 12, and can form a limiting constraint on the shaft unit 41 from above. The side positioning unit 23 includes a side positioning plate 231 and a side positioning groove 232. The side positioning groove 232 is recessed from the first side of the side positioning plate 231 (i.e. as Figure 4 shown), forming a groove with one side opening, which can laterally limit the outer peripheral wall of the shaft unit 41, and provide structural conditions for the abutment of the shaft unit 41 and the groove bottom of the side positioning groove 232;

[0043] The rotating assembly 30 includes a first rotating unit 31 and a second rotating unit 32. The first rotating unit 31 and the second rotating unit 32 are arranged between the side positioning plate 231 and the base unit 12. The first rotating unit 31 and the second rotating unit 32 of the rotating assembly 30 provide a power source for the rotation of the shaft unit 41, and are arranged between the side positioning plate 231 and the base unit 12, as Figure 2 shown, which can form a reasonable driving layout on the left and right sides of the central shaft unit 41, and facilitate the application of driving force for rotating around the central axis of the shaft unit 41 from the left and right sides of the central shaft unit 41, as Figure 2 shown, to provide power support for the stable rotation of the shaft unit 41;

[0044] The transmission shaft 40 includes a shaft unit 41 and a universal unit 42.

[0045] The assembled state of the transmission shaft 40 assembling system includes the abutment of one end of the shaft unit 41 with the base unit 12, the abutment of the other end with the universal unit 42, and the abutment of part of the outer peripheral wall of the shaft unit 41 with the groove bottom of the side positioning groove 232 (as Figure 4As shown in the figure, the first rotating unit 31 and the second rotating unit 32 jointly drive the shaft unit 41 to rotate, so that the spline shaft 413 at one end of the shaft unit 41 is aligned with the spline hole of the universal unit 42, that is, the area projected by the shaft unit 41 towards the universal unit 42 coincides with the universal unit 42, so that the shaft unit 41 can be inserted into the universal unit 42; the driving force of the second rotating unit 32 for driving the shaft unit 41 to rotate is greater than the driving force of the first rotating unit 31 for driving the shaft unit 41 to rotate; the abutting portions of the second rotating unit 32 and the first rotating unit 31 abutting against the shaft unit 41 are respectively arranged on both sides of the shaft unit 41; the abutting portion of the second rotating unit 32 abutting against the shaft unit 41 is arranged on the side of the shaft unit 41 close to the first side. By arranging the second rotating unit 32 with greater driving force than the first rotating unit 31, and arranging the abutting portions of the two on both sides of the shaft unit 41 and the abutting portion of the second rotating unit 32 close to the first side, the second rotating unit 32 can provide a force in the direction of the groove bottom of the side positioning groove 232 close to the first side for the shaft unit 41, thereby preventing the shaft unit 41 from disengaging from the side positioning groove 232, and finally solving the problem of difficult accurate alignment in the existing driving form. When the shaft unit 41 abuts against the groove bottom of the side positioning groove 232, the central axis of the shaft unit 41 coincides with the central axis of the universal unit 42. Further, the base assembly 10 comprises a machine base 11 connected with the rotating assembly 30.

[0046] Further, the first rotating unit 31 comprises a fourth driving part 311, a first rubbing block 312 and a first flexible block 313; the fourth driving part 311 is drivingly connected with the first rubbing block 312; the first flexible block 313 is connected on the side of the first rubbing block 312 close to the shaft unit 41, and can be made of rubber material, so as to reduce the abrasion of the outer peripheral wall of the first shaft unit 41 during driving, increase the contact area between the first flexible block 313 and the first shaft unit 41, and prevent the first shaft unit 41 from slipping during driving; the second rotating unit 32 comprises a fifth driving part 321, a second rubbing block 322 and a second flexible block 323; the fifth driving part 321 is drivingly connected with the second rubbing block 322; the second flexible block 323 is connected on the side of the second rubbing block 322 close to the shaft unit 41, and can be made of rubber material, so as to reduce the abrasion of the outer peripheral wall of the second shaft unit 41 during driving, increase the contact area between the second flexible block 323 and the second shaft unit 41, and prevent the second shaft unit 41 from slipping during driving; the first rubbing block 312 and the second rubbing block 322 are respectively arranged between the side positioning plate 231 and the base unit 12, so as to ensure that the driving position matches the shaft unit 41;

[0047] The assembly state also includes the first flexible block 313 and the second flexible block 323 jointly driving the shaft unit 41 to rotate, aligning the splined shaft 413 at one end of the shaft unit 41 with the splined hole of the universal joint 42. Flexible contact ensures smooth driving, achieving alignment between the splined shaft 413 and the splined hole. The deformation of the second flexible block 323 is greater than that of the first flexible block 313, and the driving force of the second flexible block 323 driving the shaft unit 41 to rotate is greater than the driving force of the first flexible block 313 driving the shaft unit 41 to rotate. The abutting portion of block 323 and the abutting portion of the first flexible block 313 abutting the shaft unit 41 are respectively disposed on both sides of the shaft unit 41; the abutting portion of the second flexible block 323 abutting the shaft unit 41 is disposed on the side of the shaft unit 41 closer to the first side. The driving force of the second flexible block 323 driving the shaft unit 41 to rotate is larger, which can make the interaction force between the second flexible block 323 and the shaft unit 41 larger and the abutting area larger, so that it is not easy to slip during the driving process, and ensures the stability of the rotation driving of the shaft unit 41.

[0048] Furthermore, the minimum distance A between the side of the second rubbing block 322 closest to the shaft unit 41 and the central axis of the shaft unit 41 gradually decreases along the first predetermined direction (i.e., as shown in the figure). Figure 4 As shown from right to left), through the inclined block structure, the more the second rubbing block 322 moves towards the shaft unit 41, the greater the force between the rubbing block and the shaft unit 41, thus making it less prone to slippage during the driving process. At the same time, the shape of the inclined block can be adapted to shaft units 41 of different diameters, expanding the applicability of the device; wherein, the first set direction is tangent to the circumferential direction of the shaft unit 41.

[0049] The assembly state also includes the second rubbing block 322 moving along the first set direction, so that the first flexible block 313 and the second flexible block 323 jointly drive the shaft unit 41 to rotate, so that the spline shaft 413 at one end of the shaft unit 41 is aligned with the spline hole of the universal unit 42.

[0050] Furthermore, the minimum distance B between the side of the first rubbing block 312 closest to the shaft unit 41 and the central axis of the shaft unit 41 gradually decreases along the second predetermined direction (i.e., as shown in the figure). Figure 4 As shown from left to right), through the inclined block structure, the greater the movement distance between the rubbing block and the shaft unit 41, the greater the force between the rubbing block and the shaft unit 41, thus making it less prone to slippage during the driving process. At the same time, the shape of the inclined block can be adapted to shaft units 41 of different diameters, expanding the applicability of the device; wherein, the second set direction is opposite to the first set direction.

[0051] The assembly state also includes the first rubbing block 312 moving along the second set direction, so that the second flexible block 323 and the first flexible block 313 jointly drive the shaft unit 41 to rotate, so that the spline shaft 413 at one end of the shaft unit 41 is aligned with the spline hole of the universal unit 42.

[0052] Further, the pressing assembly 20 further comprises a side clamping unit 22; the side clamping unit 22 is arranged on the side positioning plate 231 away from the first rotating unit 31, and can effectively clamp the universal unit 42 laterally;

[0053] The assembled state further comprises that the side clamping unit 22 fixes the relative position of the universal unit 42 and the pressing assembly 20, so that the shaft unit 41 cannot drive the universal unit 42 to rotate around its own axis during rotation, and the relative rotation between the universal unit 42 and the shaft unit 41 is ensured, thereby avoiding the problem that the spline shaft 413 and the spline hole cannot be aligned due to the common rotation of the two.

[0054] Further, the base unit 12 comprises a base body 121, a positioning hole 122, and a first elastic body 123; the base body 121 is arranged on the side of the first rotating unit 31 away from the pressing unit 21, and provides a mounting basis for the positioning hole 122 and the first elastic body 123; the positioning hole 122 is recessed from the side of the base body 121 close to the pressing unit 21 to the other side, and can accommodate and position one end of the shaft unit 41; the first elastic body 123 is arranged in the positioning hole 122; the maximum elastic force of the first elastic body 123 is greater than the weight of the shaft unit 41, and can form an upward supporting force on the shaft unit 41;

[0055] The assembled state further comprises that one end of the shaft unit 41 is arranged in the positioning hole 122, the abutment of the first elastic body 123 and the shaft unit 41 drives the elastic force of the first elastic body 123 to move the spline shaft 413 to the first state, and the compression of the first elastic body 123 by the shaft unit 41 can make the top end of the shaft unit 41 lower than the bottom end of the universal unit 42, thereby facilitating the placement of the shaft unit 41 between the base unit 12 and the universal unit 42; wherein the first state comprises that the end of the spline shaft 413 close to the pressing unit 21 abuts against the end of the spline hole close to the base body 121.

[0056] Further, the transmission shaft 40 assembly system comprises a base assembly 10; the base assembly 10 comprises a base unit 12 and a second elastic body 13; the second elastic body 13 is connected to the side of the base body 121 away from the pressing unit 21; the second elastic body 13 is drivingly connected with the base body 121; the maximum driving force of the second elastic body 13 is greater than the maximum elastic force of the first elastic body 123, thereby providing sufficient power for the movement of the spline shaft 413; the second elastic body 13 can be a driving device, and can drive the base body 121 to move up and down.

[0057] Further, as shown in Figure 3As shown, the pressing unit 21 comprises a pressing seat 211, a first driving part 212 and a pressing head 213, the pressing seat 211 is connected with the pressing head 213, and the first driving part 212 is drivingly connected with the pressing seat 211. The side clamping unit 22 comprises a first clamping head 221, a second driving part 222, a second clamping head 223 and a third driving part 224, the first clamping head 221 is drivingly connected with the second driving part 222, the second clamping head 223 is drivingly connected with the third driving part 224, and the assembled state further comprises the relative position of the first clamping head 221 and the second clamping head 223 to the universal unit 42 and the pressing assembly 20. The pressing assembly 20 further comprises a supporting seat 24, which can abut against the universal unit 42.

[0058] The assembled state further comprises that the first rotating unit 31 and the second rotating unit 32 jointly drive the shaft unit 41 to rotate, so that the spline shaft 413 at one end of the shaft unit 41 is aligned with the spline hole of the universal unit 42, and the second elastic body 13 and the first elastic body 123 jointly drive the spline shaft 413 to move to a second state through the base body 121; through sufficient driving force provided by the second elastic body 13, the outer circumferential surface of the spline shaft 413 can be partially overlapped with the inner circumferential surface of the spline hole, that is, part of the spline shaft 413 is inserted into the spline hole. The second state comprises that the outer circumferential surface of the spline shaft 413 is partially overlapped with the inner circumferential surface of the spline hole. The first rotating unit 31 further comprises a first guide rail 314 and a first sliding block 315, the first guide rail 314 is slidingly connected with the first sliding block 315, and the first sliding block 315 is connected with the fourth driving part 311. The second rotating unit 32 further comprises a second guide rail 324 and a second sliding block 325, the second guide rail 324 is slidingly connected with the second sliding block 325, and the second sliding block 325 is connected with the fifth driving part 321.

[0059] Further, as shown in the figure, Figure 5 The shaft unit 41 comprises a shaft body 411 and a connecting shaft 412, one end of the connecting shaft 412 is connected with the shaft body 411, and the other end is connected with the spline shaft 413. As shown in the figure, Figure 6 The universal unit 42 comprises a star-shaped sleeve 421, a rolling body 422, a retainer 423 and an outer housing 424, the space between the star-shaped sleeve 421 and the outer housing 424 accommodates the rolling body 422, the retainer 423 is located in the middle of the rolling body 422 and uniformly separates the rolling body 422 in the circumferential direction. The transmission shaft 40 further comprises a protective sleeve 43, which is connected with the universal unit 42.

[0060] Further, the base assembly 10 of the transmission shaft 40 assembly system further comprises a sliding unit 14; the sliding unit 14 comprises a third guide rail 141 and a third sliding block 142; the third sliding block 142 is in sliding connection with the third guide rail 141, and the third sliding block 142 moves along the central axis direction of the spline shaft 413; the third sliding block 142 is connected with the base unit 12. The base unit 12 can move up and down along the central axis direction of the spline shaft 413, ensuring the accurate movement direction of the base unit 12 when driving the spline shaft 413 to move, and guaranteeing the stability of the spline shaft 413 and the spline hole assembly process.

[0061] Embodiment two: the embodiment discloses a transmission shaft 40 assembly method, which comprises steps S10-S30, and each step is described in detail as follows:

[0062] In step S10, based on the completion of positioning, the first rotating unit 31 and the second rotating unit 32 jointly drive the shaft unit 41 to rotate around the central axis of the shaft unit 41, thereby providing a rotating action for aligning the spline shaft 413 and the spline hole; wherein the positioning completion comprises that the spline shaft 413 of the shaft unit 41 abuts against the spline hole of the universal unit 42, so as to ensure that the shaft unit 41 does not deviate from the side positioning groove 232 during rotation, and guarantee the alignment accuracy.

[0063] In step S20, based on the spline shaft 413 at one end of the shaft unit 41 being aligned with the spline hole of the universal unit 42 after the rotation of the shaft unit 41, the first rotating unit 31 and the second rotating unit 32 stop driving; wherein the driving force of the second rotating unit 32 for driving the shaft unit 41 to rotate is greater than the driving force of the first rotating unit 31 for driving the shaft unit 41 to rotate; the abutting portions of the second rotating unit 32 and the first rotating unit 31 abutting against the shaft unit 41 are respectively arranged on the two sides of the shaft unit 41; and the abutting portion of the second rotating unit 32 abutting against the shaft unit 41 is arranged on the side of the shaft unit 41 close to the first side.

[0064] In step S30, based on the first rotating unit 31 and the second rotating unit 32 stopping driving, the pressing unit 21 drives the universal unit 42 to move towards the direction of the surrounding unit to a completed assembly state, and further assembles the spline shaft 413 and the spline hole until the abutting area of the spline shaft 413 and the spline hole is greater than or equal to a set value, thereby finally completing the assembly of the transmission shaft 40; wherein the completed assembly state comprises that the abutting area of the spline shaft 413 and the spline hole is greater than or equal to a set value, and the set value can be 90% of the area of the inner circumferential wall of the spline hole.

[0065] Further, step S10 comprises steps S11-S12, and steps S11, S12, S20, S30 and S40 are executed in sequence, and each step is described in detail as follows:

[0066] In step S11, based on the positioning being completed, the second rotating unit 32 moves the driving shaft unit 41 to rotate around the central axis of the shaft unit 41, and an initial rotating driving force is applied, so as to avoid the force conflict that may be caused by the simultaneous starting of the first rotating unit 31 and the second rotating unit 32;

[0067] In step S12, the first rotating unit 31 and the second rotating unit 32 jointly move the driving shaft unit 41 to rotate around the central axis of the shaft unit 41, so as to ensure that the rotating driving force is sufficient and stable. At the same time, the collision between the first rotating unit 31 and the second rotating unit 32 and the shaft unit 41 during the driving process is prevented, and the safety and stability of the rotating driving of the shaft unit 41 are ensured.

[0068] Those skilled in the art can understand that the above-mentioned embodiments are specific cases for implementing the present disclosure, and in actual applications, various changes can be made in form and details without departing from the scope of the present disclosure.

Claims

1. A drive shaft assembly system, characterized in that, The drive shaft assembly system includes: Base unit; The pressing assembly includes a pressing unit and a side positioning unit; the pressing unit is disposed on the side of the side positioning unit away from the base unit; the side positioning unit includes a side positioning plate and a side positioning groove; the side positioning groove is recessed from the first side of the side positioning plate to form a groove with an opening on one side; The rotating assembly includes a first rotating unit and a second rotating unit; the first rotating unit and the second rotating unit are disposed between the side positioning plate and the base unit; Drive shaft, including shaft unit and universal joint unit; The assembly state of the drive shaft assembly system includes one end of the shaft unit abutting against the base unit, and the other end abutting against the universal joint unit. A portion of the outer peripheral wall of the shaft unit abuts against the bottom of the side positioning groove. The first rotating unit and the second rotating unit jointly drive the shaft unit to rotate, aligning the splined shaft at one end of the shaft unit with the splined hole of the universal joint unit. The driving force of the second rotating unit driving the shaft unit to rotate is greater than the driving force of the first rotating unit driving the shaft unit to rotate. The abutting portions of the second rotating unit and the first rotating unit abutting against the shaft unit are respectively located on the shaft unit. Both sides; the abutting portion of the second rotating unit abutting the shaft unit is disposed on the side of the shaft unit near the first side; the first rotating unit includes a fourth driving part, a first rubbing block, and a first flexible block; the fourth driving part is driven connected to the first rubbing block; the first flexible block is connected to the side of the first rubbing block near the shaft unit; the second rotating unit includes a fifth driving part, a second rubbing block, and a second flexible block; the fifth driving part is driven connected to the second rubbing block; the second flexible block is connected to the side of the second rubbing block near the shaft unit; the first rubbing block and the second rubbing block are respectively disposed between the side positioning plate and the base unit; The assembly state further includes the first flexible block and the second flexible block jointly driving the shaft unit to rotate so that the spline shaft at one end of the shaft unit is aligned with the spline hole of the universal joint; wherein, the deformation of the second flexible block is greater than the deformation of the first flexible block, and the driving force of the second flexible block driving the shaft unit to rotate is greater than the driving force of the first flexible block driving the shaft unit to rotate; the abutting portion of the second flexible block abutting the shaft unit and the abutting portion of the first flexible block abutting the shaft unit are respectively disposed on both sides of the shaft unit; the abutting portion of the second flexible block abutting the shaft unit is disposed on the side of the shaft unit closer to the first side.

2. The drive shaft assembly system according to claim 1, characterized in that, The minimum distance A between the side of the second rubbing block closest to the shaft unit and the central axis of the shaft unit gradually decreases along a first predetermined direction; wherein, the first predetermined direction is tangent to the circumferential direction of the shaft unit; The assembly state also includes the second rubbing block moving along the first set direction, so that the first flexible block and the second flexible block jointly drive the shaft unit to rotate so that the spline shaft at one end of the shaft unit is aligned with the spline hole of the universal unit.

3. The drive shaft assembly system according to claim 2, characterized in that, The minimum distance B between the side of the first rubbing block closest to the shaft unit and the central axis of the shaft unit gradually decreases along a second predetermined direction; wherein, the second predetermined direction is opposite to the first predetermined direction; The assembly state also includes the first rubbing block moving along the second set direction, so that the second flexible block and the first flexible block jointly drive the shaft unit to rotate so that the spline shaft at one end of the shaft unit is aligned with the spline hole of the universal unit.

4. The drive shaft assembly system according to claim 1, characterized in that, The pressing assembly further includes a side clamping unit; the side clamping unit is disposed on the side of the side positioning plate away from the first rotating unit; The assembly state also includes the side clamping unit fixing the relative position of the universal joint unit and the pressing component.

5. A drive shaft assembly system according to claim 1, characterized in that, The base unit includes a base body, a positioning hole, and a first elastic body; the base body is disposed on the side of the first rotating unit away from the pressing unit; the positioning hole is recessed from the side of the base body near the pressing unit to the other side; the first elastic body is disposed in the positioning hole; the maximum elastic force of the first elastic body is greater than the weight of the shaft unit. The assembly state also includes one end of the shaft unit being disposed in the positioning hole, and the first elastic body abutting against the shaft unit to move the spline shaft to a first state; wherein, the first state includes the spline shaft abutting against the end near the pressing unit and the spline hole abutting against the end near the base body.

6. A drive shaft assembly system according to claim 5, characterized in that, The drive shaft assembly system includes a base assembly; the base assembly includes a base unit and a second elastic body; the second elastic body is connected to the side of the base unit away from the pressing unit; the second elastic body is drivenly connected to the base unit; the maximum driving force of the second elastic body is greater than the maximum elastic force of the first elastic body; The assembly state further includes the first rotating unit and the second rotating unit jointly driving the shaft unit to rotate so that the spline shaft at one end of the shaft unit is aligned with the spline hole of the universal unit, and the second elastic body and the first elastic body jointly drive the spline shaft to move to the second state through the base body; wherein, the second state includes the outer peripheral surface of the spline shaft partially coinciding with the inner peripheral surface of the spline hole.

7. A drive shaft assembly system according to claim 1, characterized in that, The base assembly of the drive shaft assembly system further includes a sliding unit; the sliding unit includes a third guide rail and a third slider; the third slider is slidably connected to the third guide rail, and the third slider moves along the central axis of the spline shaft; the third slider is connected to the base unit.

8. A method for assembling a drive shaft, characterized in that, The drive shaft assembly method described herein is applied to a drive shaft assembly system as described in any one of claims 1-7; Based on the completion of positioning, the first rotating unit and the second rotating unit jointly drive the shaft unit to rotate around the central axis of the shaft unit; wherein, the completion of positioning includes the spline shaft of the shaft unit abutting against the spline hole of the universal unit; Based on the rotation of the shaft unit until the spline shaft at one end of the shaft unit aligns with the spline hole of the universal joint, the first rotating unit and the second rotating unit stop driving; wherein, the driving force of the second rotating unit driving the shaft unit to rotate is greater than the driving force of the first rotating unit driving the shaft unit to rotate; the abutting portion of the second rotating unit abutting the shaft unit and the abutting portion of the first rotating unit abutting the shaft unit are respectively disposed on both sides of the shaft unit; the abutting portion of the second rotating unit abutting the shaft unit is disposed on the side of the shaft unit closer to the first side; Based on the cessation of the first and second rotating units, the pressing unit drives the universal unit to move towards the circumferential unit direction until the assembly is complete; wherein, the assembly is complete includes the area of ​​the spline shaft abutting the spline hole being greater than or equal to a set value.

9. A method for assembling a transmission shaft according to claim 8, characterized in that, Based on positioning completion, the first rotating unit and the second rotating unit jointly drive the shaft unit to rotate around the central axis of the shaft unit, including: Based on the positioning completion, the second rotating unit moves and drives the shaft unit to rotate around the central axis of the shaft unit; The first rotating unit and the second rotating unit move together to drive the shaft unit to rotate around the central axis of the shaft unit.

Images