A method and system for assembling a propeller shaft

Abstract

The present application relates to the technical field of transmission shaft, in particular to a transmission shaft assembling method and system. The method comprises the following steps: the first universal unit and the dustproof assembly are pretreated on the supporting assembly; wherein, the dustproof assembly comprises the first dustproof unit and the first clamp; the pretreatment comprises the following steps: the first universal unit, the first dustproof unit and the first clamp are sequentially sleeved, the inner circumferential surface of the first dustproof unit in the space is at least partially abutted with the outer circumferential surface of the first universal unit, the first dustproof unit exerts the first acting force on the first universal unit, and the first dustproof unit and the first universal unit form the dustproof cavity; the balancing assembly reduces the difference between the air pressure in the dustproof cavity and the atmospheric pressure; the locking assembly reduces the inner diameter of the first clamp to the first state; wherein, the first state comprises that the first dustproof unit exerts the second acting force on the first universal unit; the first acting force is smaller than the second acting force. Thus, the problem that the transmission shaft is easily worn after assembling is solved.

Description

Technical Field

[0001] This invention relates to the field of drive shaft technology, and more specifically, to a drive shaft assembly method and system. Background Technology

[0002] Driveshafts are typically used to transmit torque between the powertrain and drive components. Dustproof components are generally installed on the outside of the universal joint of the driveshaft to protect the moving parts of the universal joint from dust and provide a seal. The dust cover in the dustproof component is usually connected to the universal joint housing, shaft unit, and other components via clamps, thus forming a relatively closed dustproof chamber between the dust cover and the corresponding components.

[0003] During the assembly of the drive shaft, the relative position of the dust cover and the universal joint housing, as well as the axial expansion and contraction of the dust cover, affect the volume of the dust chamber. When there is a significant difference between the air pressure inside the dust chamber and the outside atmospheric pressure, the dust cover may bulge or collapse. When the dust cover collapses, adjacent parts of its outer peripheral wall are prone to friction, which may cause abnormal wear; when the dust cover bulges, it may also affect its assembly condition and operational stability. Summary of the Invention

[0004] To address the problem of easy wear after assembly of drive shafts, this invention provides a drive shaft assembly method and system.

[0005] In a first aspect, the present invention provides a method for assembling a drive shaft, the method comprising:

[0006] The first universal joint and the dustproof component are pre-processed on the support component; wherein, the dustproof component includes a first dustproof unit and a first clamp; the pre-processing includes the first universal joint, the first dustproof unit and the first clamp being sequentially sleeved, the inner peripheral surface of the first dustproof unit within the space surrounded by the first clamp at least partially abutting against the outer peripheral surface of the first universal joint, the first dustproof unit applying a first force to the first universal joint, and the first dustproof unit and the first universal joint surrounding each other forming a dustproof chamber;

[0007] The balancing component reduces the pressure difference between the dustproof chamber and the outside atmospheric pressure;

[0008] The locking assembly reduces the inner diameter of the first clamp to a first state; wherein, the first state includes the first dustproof unit applying a second force to the first universal unit; the first force is less than the second force.

[0009] Optionally, the balancing component reduces the pressure difference between the dustproof chamber and the outside atmospheric pressure by including:

[0010] Obtain the length of the first dust cover of the first dustproof unit along its own axial direction;

[0011] Based on the fact that the length of the first dust cover along its own axial direction is greater than or equal to a first predetermined length and less than a second predetermined length, the balancing component drives the first housing of the first universal joint to move a predetermined distance along a first direction; wherein, the first direction is the direction from the first dust cover to the first universal joint; the first dust cover includes the first dust cover and a first inner engaging portion, the first inner engaging portion being disposed on the inner peripheral wall of the first dust cover in the space surrounded by the first clamp; the first universal joint includes the first housing and a first outer engaging portion, the first outer engaging portion being disposed on the outer peripheral wall of the first housing.

[0012] Optionally, the balancing component further reduces the pressure difference between the dustproof chamber and the outside atmospheric pressure by including:

[0013] Based on the fact that the length of the first dust cover along its own axial direction is greater than or equal to the second set length and less than the third set length, the balancing component drives the first housing to move along the first direction until the first outer engaging part connects with the first inner engaging part.

[0014] Optionally, the balancing component further reduces the pressure difference between the dustproof chamber and the outside atmospheric pressure by including:

[0015] Based on the fact that the length of the first dust cover along its own axial direction is greater than the fourth predetermined length and less than the first predetermined length, the balancing component drives the first dust cover to move close to the first clamp end until it connects with the first outer clamping part and the first inner clamping part.

[0016] Optionally, during the process of the balancing component driving the first housing of the first universal unit to move a set distance along the first direction, the gap between the outer peripheral wall of the first housing and the inner peripheral wall of the first dust cover is connected to the dustproof chamber and the outside atmosphere through a vent hole; wherein, the first dustproof unit further includes a vent hole, the vent hole passing through both sides of the first inner engaging portion along the axial direction of the first dust cover; the first outer engaging portion is recessed from the outer peripheral wall of the first housing toward the central axis of the first housing; one side of the first inner engaging portion is connected to the inner peripheral wall of the first dust cover, and the other side extends toward the direction close to the central axis of the first dust cover.

[0017] Optionally, the drive shaft assembly method further includes:

[0018] Based on the locking component reducing the inner diameter of the first clamp to a first state, the balancing component drives the first universal unit to move a fifth predetermined length along the second direction; wherein, during this step, the volume of the first dustproof unit is reduced; the second direction is the direction from the first universal unit to the first dustproof unit;

[0019] The balancing component moves to a point where it separates from the first universal joint for a set time;

[0020] The distance that the first dustproof unit rebounds and drives the first universal unit to move along a first direction is obtained; wherein the first direction is opposite to the second direction.

[0021] Based on the distance the first dustproof unit rebounds and drives the first universal unit to move along the first direction, and the fifth set length, the assembly qualification is determined.

[0022] Optionally, the pre-processing of the first universal unit and the dustproof component on the support component includes:

[0023] The pre-assembled driveshaft is moved onto the support assembly; wherein, the shaft assembly includes a first universal joint, a shaft unit, and a second universal joint; the first universal joint, the shaft unit, and the second universal joint are sequentially connected along the axial direction of the shaft unit; the dustproof assembly further includes a second dustproof unit and a clamp unit; the clamp unit includes a first clamp, a second clamp, and a third clamp; the pre-assembled driveshaft includes the first dustproof unit sleeved on the outer periphery of the shaft unit at the end away from the first universal joint, and the second clamp sleeved on the outer periphery of the first dustproof unit at the end away from the first universal joint. One end of the second dustproof unit is sleeved on the outer periphery of the second universal joint, and the other end is detachably connected to the outer periphery of the shaft unit. The third clamp is sleeved on the outer periphery of the second dustproof unit near the end of the second universal joint. The end of the first dustproof unit near the shaft unit applies a third force to the shaft unit, and the end of the second dustproof unit near the second universal joint applies a fourth force to the second universal joint. The second dustproof unit and the first dustproof unit are arranged sequentially along a first direction; the first direction is the direction from the first dustproof unit to the first universal joint.

[0024] The locking assembly reduces the inner diameter of the third clamp to a second state; wherein, the second state includes the second dustproof unit applying a fifth force to the second universal unit, the fifth force being greater than the fourth force;

[0025] The locking assembly reduces the inner diameter of the second clamp to a third state; wherein, the third state includes the first dustproof unit applying a sixth force to the shaft unit, the sixth force being greater than the third force;

[0026] Based on the locking component reducing the inner diameter of the second clamp to the third state, the first universal unit and the dustproof component are pre-processed on the support component.

[0027] Optionally, the locking assembly reducing the inner diameter of the third clamp to the second state includes:

[0028] Based on moving the initially assembled drive shaft onto the support assembly, the shaft assembly is driven to move along the second direction to the positioning part that abuts against the support assembly;

[0029] The locking assembly reduces the inner diameter of the third clamp to the second state.

[0030] In a second aspect, the present invention provides a driveshaft assembly system, wherein the driveshaft assembly system is applied to any of the driveshaft assembly methods described in the first aspect, and the driveshaft assembly system comprises:

[0031] Support components;

[0032] Locking components;

[0033] First universal joint unit;

[0034] Dustproof components, including a first dustproof unit and a first clamp;

[0035] Balancing components;

[0036] The working state of the drive shaft assembly system includes the pre-processing of the first universal joint and the dustproof component on the support component, the balancing component reducing the pressure difference between the dustproof chamber and the outside atmospheric pressure, and the locking component reducing the inner diameter of the first clamp to a first state; wherein, the pre-processing includes the first universal joint, the first dustproof unit, and the first clamp being sequentially fitted, the inner circumferential surface of the first dustproof unit within the space surrounded by the first clamp at least partially abutting the outer circumferential surface of the first universal joint, the first dustproof unit applying a first force to the first universal joint, and the first dustproof unit and the first universal joint surrounding each other forming a dustproof chamber; the first state includes the first dustproof unit applying a second force to the first universal joint; the first force is less than the second force.

[0037] Optionally, the first dustproof unit includes a first dustproof cover and a first inner engaging portion; the first inner engaging portion is disposed on the inner peripheral wall of the first dustproof cover within the space enclosed by the first clamp;

[0038] The first universal joint includes a first housing and a first outer engaging portion; the outer peripheral wall of the first housing is connected to the first outer engaging portion; the first outer engaging portion is used to connect to the first inner engaging portion.

[0039] To solve the problem of easy wear after assembly of the drive shaft, the present invention has the following advantages:

[0040] By pre-processing the first universal joint unit and dustproof assembly on the support assembly, the first universal joint unit, the first dustproof unit, and the first clamp are sequentially fitted together. The inner circumferential surface of the first dustproof unit within the space enclosed by the first clamp at least partially abuts against the outer circumferential surface of the first universal joint unit. The first dustproof unit applies a first force to the first universal joint unit, and the first dustproof unit and the first universal joint unit enclose and form a dustproof chamber, completing the initial assembly and positioning of the dustproof structure. By reducing the pressure difference between the dustproof chamber and the outside atmospheric pressure through the balancing assembly, the pressure difference between the dustproof chamber and the outside atmospheric pressure can be avoided, preventing the first dustproof unit from shrinking excessively and deforming inward due to the pressure difference between the dustproof chamber and the outside atmospheric pressure, thus reducing the number of deformations on its outer circumferential wall. To prevent excessive wear caused by friction between the components, and to avoid the first dustproof unit from expanding excessively and deforming due to the air pressure inside the dustproof chamber being higher than the outside atmospheric pressure, and to prevent excessive pressure inside the chamber from causing lubricant to leak from the gap between the first dustproof unit and the first universal joint; by reducing the inner diameter of the first clamp to the first state through the locking component, the first dustproof unit applies a second force to the first universal joint that is greater than the first force, thereby improving the tightness of the fit between the first dustproof unit and the first universal joint, and ultimately solving the problems of abnormal deformation, excessive wear and sealing failure of the dustproof unit due to air pressure difference in the drive shaft assembly, ensuring the assembly quality and operational stability of the dustproof structure. Attached Figure Description

[0041] Figure 1 A schematic diagram of a drive shaft assembly method according to one embodiment is shown;

[0042] Figure 2 A schematic diagram of a support assembly, shaft assembly, and dustproof assembly according to one embodiment is shown;

[0043] Figure 3 A schematic diagram of a drive shaft assembly system according to one embodiment is shown;

[0044] Figure 4 A partial schematic diagram of a drive shaft assembly system according to one embodiment is shown;

[0045] Figure 5 A cross-sectional schematic diagram of a shaft assembly and a dustproof assembly according to one embodiment is shown;

[0046] Figure 6 It shows Figure 5 Enlarged view of a portion of point A in the middle;

[0047] Figure 7 It shows Figure 5 Enlarged view of a portion of point B in the middle;

[0048] Figure 8 A partial schematic diagram of a first dustproof unit according to one embodiment is shown.

[0049] Reference numerals: 10, Support assembly; 11, First support unit; 111, First support portion; 112, Positioning portion; 12, Transport unit; 13, Second support unit; 131, Second support portion; 132, Second limiting portion; 20, Locking assembly; 21, First locking unit; 22, Second locking unit; 23, Third locking unit; 30, Shaft assembly; 31, First universal joint unit; 311, First universal joint module; 312, First housing; 313, First external engaging portion; 32, Shaft unit; 33, Second universal joint unit; 331, Second universal joint module; 332, Third... Two housings; 333, second outer engaging part; 40, dustproof assembly; 41, first dustproof unit; 411, first dustproof cover; 412, first inner engaging part; 413, second inner engaging part; 414, vent; 42, second dustproof unit; 421, second dustproof cover; 422, third inner engaging part; 423, fourth inner engaging part; 43, clamp unit; 431, first clamp; 432, second clamp; 433, third clamp; 434, fourth clamp; 50, balancing assembly; 51, balancing unit; 52, ventilating unit; 53, detection unit; 54, drive unit. Detailed Implementation

[0050] The present disclosure will now be discussed with reference to several exemplary embodiments. It should be understood that these embodiments are discussed only to enable those skilled in the art to better understand and thus implement the present disclosure, and are not intended to imply any limitation on the scope of the disclosure.

[0051] As used herein, the term "comprising" and its variations are to be interpreted as open-ended terms meaning "including but not limited to". The term "based on" is to be interpreted as "at least partially based on". The terms "one embodiment" and "an embodiment" are to be interpreted as "at least one embodiment". The term "another embodiment" is to be interpreted as "at least one other embodiment". The terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "vertical", "horizontal", "lateral", "longitudinal", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments and are not intended to limit the indicated devices, elements, or components to having a specific orientation or being constructed and operated in a specific orientation. Furthermore, some of the above terms may be used to indicate other meanings besides orientations or positional relationships; for example, the term "upper" may in some cases indicate a dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application according to the specific circumstances. In addition, the terms "installed", "set up", "equipped with", "connected", and "linked" should be interpreted broadly. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, elements, or components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances. Furthermore, the terms "first," "second," etc., are mainly used to distinguish different devices, elements, or components (the specific types and structures may be the same or different), and are not used to indicate or imply the relative importance or quantity of the indicated devices, elements, or components. Unless otherwise stated, "a plurality of" means two or more.

[0052] During the assembly of the drive shaft, in the process of assembling the first universal joint 31 with the dustproof component 40 to form a dustproof chamber, the relative position of the first dustproof unit 41 and the first universal joint 31, as well as the axial extension and contraction of the first dustproof unit 41, will change the volume of the dustproof chamber, thus causing a large difference between the air pressure inside the dustproof chamber and the external atmospheric pressure. When the air pressure inside the dustproof chamber is lower than the external atmospheric pressure, the first dustproof unit 41 will collapse. In the collapsed state, adjacent parts of the outer peripheral wall of the first dustproof unit 41 are prone to mutual friction, which will lead to abnormal wear of the first dustproof unit 41. When the air pressure inside the dustproof chamber is higher than the external atmospheric pressure, the first dustproof unit 41 will bulge. The bulging state will affect the assembly state of the first dustproof unit 41 and adversely affect its operational stability. Furthermore, during the locking operation of reducing the inner diameter of the first clamp 431, the air pressure difference problem in the dustproof chamber will become more apparent, making it difficult to ensure the consistency of the drive shaft assembly state.

[0053] Example 1:

[0054] The drive shaft assembly system is applied to the drive shaft assembly method. The system includes a support assembly 10, a locking assembly 20, a first universal joint 31, a dustproof assembly 40, and a balancing assembly 50. The first universal joint 31 and the dustproof assembly 40 can form a drive shaft. The first universal joint 31 can be a housing component with a drive connection structure, which is a three-ball pin universal joint or a telescopic ball cage universal joint. The support assembly 10 is used to position and support the first universal joint 31. The balancing assembly 50 can be used to drive the first universal joint 31 and the first dustproof assembly 41 to move along a predetermined path.

[0055] In this embodiment, as Figure 1 As shown, this embodiment provides a drive shaft assembly method, which includes steps S10 to S30. Each step will be described in detail below:

[0056] Step S10: The first universal joint unit 31 and the dustproof component 40 are pre-processed on the support component 10. The dustproof component 40 includes a first dustproof unit 41 and a first clamp 431. The pre-processing includes the first universal joint unit 31, the first dustproof unit 41, and the first clamp 431 being sequentially fitted along the central axis of the first clamp 431 to its outer peripheral surface. The inner peripheral surface of the first dustproof unit 41 within the space enclosed by the first clamp 431 at least partially abuts against the outer peripheral surface of the first universal joint unit 31, allowing the first clamp 431 to pre-tighten the first dustproof unit 41, causing the first dustproof unit 41 to apply a first force to the first universal joint unit 31. The first dustproof unit 41 and the first universal joint unit 31 together form an incompletely sealed dustproof chamber. Lubricant can be provided within the dustproof chamber to reduce wear on the drive shaft during operation.

[0057] In step S20, the balancing component 50 reduces the pressure difference between the dustproof chamber and the outside atmospheric pressure, thereby preventing the air pressure inside the dustproof chamber from being lower than the outside atmospheric pressure, which would cause the volume of the first dustproof unit 41 to shrink to less than a first set volume. The first set volume can be 80% to 98% of the volume of the first dustproof unit 41 in its natural state. This prevents the first dustproof unit 41 from deforming inward towards the dustproof chamber due to air pressure, thereby reducing friction between multiple points on the outer peripheral wall of the first dustproof unit 41 and causing it to wear too quickly. It also prevents the air pressure inside the dustproof chamber from being higher than the outside atmospheric pressure, which would cause the volume of the first dustproof unit 41 to expand to greater than a second set volume. The second set volume can be 102% to 120% of the volume of the first dustproof unit 41 in its natural state. This prevents the first dustproof unit 41 from deforming outward away from the dustproof chamber due to air pressure, and prevents excessive pressure inside the dustproof chamber from causing lubricant to leak from the gap between the first dustproof unit 41 and the first universal unit 31 to the outside. The natural state can refer to the state of the first dustproof unit 41 when the drive shaft is mounted on the vehicle, the vehicle's steering angle is 0°, and the vehicle is stationary on a level road.

[0058] In step S30, the locking assembly 20 reduces the inner diameter of the first clamp 431 to a first state; wherein, the first state includes the first dustproof unit 41 applying a second force to the first universal joint 31; the first force is less than the second force; in this way, the connection between the first dustproof unit 41 and the first universal joint 31 can be made tighter through the first clamp 431, preventing foreign objects from entering the dustproof chamber from the gap between the first dustproof unit 41 and the first universal joint 31, and also preventing lubricant from overflowing to the outside from the gap between the first dustproof unit 41 and the first universal joint 31.

[0059] Furthermore, step S20 may also include steps S21 and S22, and each step will be described in detail below: steps S10, S21, S22 and S30 are executed in sequence.

[0060] Step S21, obtain the first dust cover 411 of the first dustproof unit 41 along its own axial direction (i.e., as shown in the figure). Figure 3 The length of the first dust cover 411 in the left and right directions (as shown) is used to determine the difference between the current length of the first dust cover 411 and the length of the first dust cover 411 in its natural state; the first set length can be the length of the first dust cover 411 in its natural state along its own axis; the second set length can be 0.8 to 1 times the maximum length that the first dust cover 411 can reach when stretched after the drive shaft is installed on the vehicle.

[0061] Step S22: Based on the fact that the length of the first dust cover 411 along its own axial direction is greater than or equal to the first set length and less than the second set length, it can be determined that the current length of the first dust cover 411 along its own axial direction is the length of the first dust cover 411 along its own axial direction in its natural state, and the first outer engaging part 313 and the first inner engaging part 412 are engaged and connected to each other. Subsequently, the balancing component 50 drives the first housing 312 of the first universal joint unit 31 to move a set distance along the first direction; wherein, the first direction is the direction from the first dust cover unit 41 to the first universal joint unit 31, that is, as shown in the figure. Figure 5 As shown from left to right: the first dustproof unit 41 includes a first dustproof cover 411 and a first inner engaging part 412. The first inner engaging part 412 is disposed on the inner peripheral wall of the first dustproof cover 411 in the space surrounded by the first clamp 431; the first universal unit 31 includes a first housing 312 and a first outer engaging part 313. The first outer engaging part 313 is disposed on the outer peripheral wall of the first housing 312. The first outer engaging part 313 and the first inner engaging part 412 can be connected to each other to fix the relative position of the first housing 312 and the first dustproof cover 411. The set distance can be 0.2 to 0.5 times the axial dimension of the first inner engaging part 412 along the first housing 312.

[0062] The balancing assembly 50 drives the first universal joint 31, preventing damage to the flexible first dust cover 411. The balancing assembly 50 drives the first housing 312 of the first universal joint 31 to move a set distance along a first direction. Utilizing the force between the first housing 312 and the first dust cover 411, the first housing 312 drives one end of the first dust cover 411 located within the space enclosed by the first clamp 431 to move along the first direction, thereby increasing the axial length of the first dust cover 411 and thus increasing the volume of the dustproof chamber, while simultaneously preventing the first outer engaging portion 313 from separating from the first inner engaging portion 412. Subsequently, the locking assembly 20 reduces the inner diameter of the first clamp 431 to a first state, sealing the dustproof chamber with the first clamp 431. After the drive shaft is assembled, the first dust cover 411 naturally springs back, shortening its length. Since the air volume inside the dust cover chamber remains unchanged, the air pressure inside the dust cover chamber is positive relative to the outside atmospheric pressure. This effectively suppresses friction between the wrinkles of the first dust cover unit 41 and reduces abnormal wear. However, due to limitations in actual assembly conditions, the pressure difference between the dust cover chamber and the outside atmosphere cannot be completely eliminated. The dust cover chamber may be in a positive or negative pressure state after assembly. Therefore, given the limited assembly control precision, this design prioritizes setting the dust cover chamber to positive pressure to maximize the service life of the first dust cover unit 41.

[0063] Furthermore, step S20 also includes step S211, and each step will be described in detail below: steps S10, S21, S211 and S30 are executed in sequence.

[0064] In step S211, based on the fact that the length of the first dust cover 411 along its own axial direction is greater than or equal to the second set length and less than the third set length, it can be determined that the first inner locking part 412 and the first outer locking part 313 are arranged sequentially along the first direction. The balancing component 50 drives the first housing 312 to move along the first direction until the first outer locking part 313 connects with the first inner locking part 412. The third set length can be the length limit value of the first dust cover 411. If it is greater than or equal to the third set length, a warning will be issued.

[0065] As the first housing 312 moves along the first direction, the end of the first dust cover 411 near the first clamp 431 moves along the first direction with the first housing 312, increasing the length and volume of the first dust cover 411, thereby increasing the volume of the dustproof chamber. When the length of the first dust cover 411 increases to its maximum limit, the end of the first dust cover 411 near the first clamp 431 can no longer move with the first housing 312, causing the first inner engaging part 412 to gradually move to connect with the first outer engaging part 313. This method allows the first outer engaging part 313 to engage with the first inner engaging part 412. Also, after the drive shaft is assembled, the first dust cover 411 in its natural state rebounds, causing its length to shorten, while the air storage capacity in the dustproof chamber remains unchanged. Therefore, the air pressure in the dustproof chamber in its natural state is positive relative to the outside atmospheric pressure, ultimately achieving the effect of suppressing the mutual friction of the folds of the first dustproof unit 41 and reducing abnormal wear. Due to limitations in actual assembly conditions, the pressure difference between the dustproof chamber and the outside atmosphere cannot be completely eliminated. After assembly, the dustproof chamber may be in a positive pressure state or a negative pressure state; therefore, under the premise of limited assembly control precision, this solution prioritizes setting the dustproof chamber to positive pressure, thereby maximizing the service life of the first dustproof unit 41.

[0066] Furthermore, step S20 also includes step S2111, and each step will be described in detail below: steps S10, S21, S2111, and S30 are executed in sequence.

[0067] In step S2111, based on the fact that the length of the first dust cover 411 along its own axial direction is greater than the fourth preset length and less than the first preset length, it can be determined that the first outer locking part 313 and the first inner locking part 412 are arranged sequentially along the first direction. The balancing component 50 drives the first dust cover 411 to move to the end near the first clamp 431 until the first outer locking part 313 and the first inner locking part 412 are connected. The fourth preset length can be the minimum length limit value of the first dust cover 411. If it is less than or equal to the fourth preset length, a warning will be issued.

[0068] By connecting the first inner engaging part 412 and the first outer engaging part 313 through the balancing component 50, the current dustproof chamber volume can be the same as the dustproof chamber volume when the first dustproof cover 411 is in its natural state, preventing the dustproof chamber from forming a negative pressure relative to the outside atmosphere after the drive shaft is assembled.

[0069] Furthermore, after step S2111 is completed, the balancing component 50 can be controlled to drive the first housing 312 of the first universal unit 31 to move a set distance along the first direction, thereby further preventing the formation of negative pressure in the dustproof chamber after the transmission shaft is assembled, which would cause the first dustproof cover 411 to wear easily.

[0070] At least in step S22, during the process of the balancing component 50 driving the first housing 312 of the first universal unit 31 to move a set distance along the first direction, the gap between the outer peripheral wall of the first housing 312 and the inner peripheral wall of the first dust cover 411 is connected to the dustproof chamber and the outside atmosphere through the vent 414; wherein, as Figure 8 As shown, the first inner engaging portion 412 can be configured as an annular body, and the first dustproof unit 41 also includes a vent 414, which penetrates both sides of the first inner engaging portion 412 along the axial direction of the first dustproof cover 411; the first outer engaging portion 313 is recessed from the outer peripheral wall of the first housing 312 toward the central axis of the first housing 312 to form a groove; one side of the first inner engaging portion 412 is connected to the inner peripheral wall of the first dustproof cover 411, and the other side extends toward the central axis of the first dustproof cover 411 to form a protrusion.

[0071] The dustproof chamber, the gap between the outer peripheral wall of the first housing 312 and the inner peripheral wall of the first dustproof cover 411, and the vent 414 are connected in sequence, so that the outside atmosphere can enter the dustproof chamber more easily and prevent the formation of negative pressure in the dustproof chamber when the first dustproof cover 411 is in its natural state to the greatest extent.

[0072] Furthermore, at least in step S22, during the process of the balancing component 50 driving the first housing 312 of the first universal unit 31 to move a set distance along the first direction, the ventilation unit 52 of the balancing component 50 can be controlled to move between the first dust cover 411 and the first housing 312, thereby widening the gap between the first dust cover 411 and the first housing 312, so that the outside air can more easily enter the dustproof chamber.

[0073] Furthermore, the drive shaft assembly method also includes steps S41 to S44, which will be described in detail below: steps S10, S20, S30, and steps S41 to S44 are executed sequentially.

[0074] Step S41: Based on the locking assembly 20 reducing the inner diameter of the first clamp 431 to the first state, the drive shaft assembly can be considered complete. Subsequently, the balancing assembly 50 drives the first universal joint 31 to move a fifth predetermined length along the second direction. During step S41, the mutually distant ends of the first dustproof unit 41 and the first universal joint 31 move towards each other, reducing the volume of the first dustproof unit 41. The second direction is the direction from the first universal joint 31 to the first dustproof unit 41, i.e., as shown... Figure 5 As shown from right to left, the fifth set length can be 0.3 to 0.6 times the length of the first dustproof unit 41 along its own axis in its natural state;

[0075] Step S42, the balancing component 50 is moved to a position where it is separated from the first universal unit 31 for a set time, allowing the first dustproof unit 41 sufficient time to rebound;

[0076] Step S43: Obtain the distance by which the first dustproof unit 41 rebounds and drives the first universal joint 31 to move along the first direction; wherein the first direction is opposite to the second direction;

[0077] Step S44: Based on the distance the first dustproof unit 41 moves along the first direction by the springback drive of the first universal unit 31 and the fifth set length, the assembly qualification is obtained, thereby completing the inspection work after the transmission shaft assembly.

[0078] If the difference between the distance the first dustproof unit 41 moves along the first direction and the fifth set length is within the set range, it is considered that the airtightness of the dustproof chamber is not a problem and / or the pressure inside the dustproof chamber meets the production standard, and the assembly is deemed qualified. If the difference between the distance the first dustproof unit 41 moves along the first direction and the fifth set length is less than the set range, it is considered that the airtightness of the dustproof chamber is a problem and / or the negative pressure inside the dustproof chamber is too large, and the assembly is deemed unqualified. If the difference between the distance the first dustproof unit 41 moves along the first direction and the fifth set length is greater than the set range, it is considered that the airtightness of the dustproof chamber is a problem and / or the positive pressure inside the dustproof chamber is too large, and the assembly is deemed unqualified.

[0079] Furthermore, step S10 includes steps S11 to S14, each of which will be described in detail below. Steps S11 to S14, step S20, and step S30 are executed sequentially.

[0080] Step S11: Move the initially assembled drive shaft onto the support assembly 10; wherein, as shown in the figure... Figure 5As shown, the shaft assembly 30 includes a first universal joint 31, a shaft unit 32, and a second universal joint 33. The first universal joint 31, shaft unit 32, and second universal joint 33 are connected sequentially along the axial direction of the shaft unit 32. The first universal joint 31 can be used to connect the vehicle's main reducer, and the second universal joint 33 can be a fixed-type ball joint for connecting the vehicle's drive wheels, thereby transmitting power from the main reducer to the drive wheels through the drive shaft. The dustproof assembly 40 also includes a second dustproof unit 42 and a clamp unit 43. The clamp unit 43 includes a first clamp 431, a second clamp 432, and a third clamp 433. The initially assembled drive shaft includes the first dustproof unit 41 with one end away from the first universal joint 31 sleeved on the outer periphery of the shaft unit 32, the second clamp 432 sleeved on the outer periphery of the end of the first dustproof unit 41 away from the first universal joint 31, and one end of the second dustproof unit 42 sleeved on the second universal joint 32. The second universal joint 33 is detachably connected to the outer periphery of the shaft unit 32 at one end. A third clamp 433 is fitted onto the outer periphery of the second dustproof unit 42 near the end of the second universal joint 33. The second clamp 432 can apply a third force to the outer periphery of the shaft unit 32 by the inner peripheral wall of the first dustproof unit 41 near the end of the shaft unit 32, thereby limiting the relative displacement between the end of the first dustproof unit 41 near the shaft unit 32 and the shaft unit 32. The third clamp 433 can apply a fourth force to the outer periphery of the second universal joint 33 by the inner peripheral wall of the second dustproof unit 42 near the end of the second universal joint 33, thereby limiting the relative displacement between the end of the second dustproof unit 42 near the second universal joint 33 and the second universal joint 33. The second dustproof unit 42 and the first dustproof unit 41 are arranged sequentially along a first direction; the first direction is the direction from the first dustproof unit 41 to the first universal joint 31.

[0081] In step S12, the locking assembly 20 reduces the inner diameter of the third clamp 433 to the second state; wherein, the second state includes the inner circumferential surface of the second dustproof unit 42 near the second universal unit 33 applying a fifth force to the outer circumferential surface of the second universal unit 33, the fifth force being greater than the fourth force; thus fixing the relative position of the second dustproof unit 42 near the second universal unit 33 with the second universal unit 33.

[0082] Step S13, the locking assembly 20 reduces the inner diameter of the second clamp 432 to the third state; wherein, the third state includes the inner circumferential surface of the first dustproof unit 41 near the shaft unit 32 applying a sixth force to the outer circumferential surface of the shaft unit 32, the sixth force being greater than the third force; thus fixing the relative position of the first dustproof unit 41 near the shaft unit 32 and the shaft unit 32.

[0083] Step S14: Based on the locking component 20 reducing the inner diameter of the second clamp 432 to the third state, the first universal unit 31 and the dustproof component 40 are pre-processed on the support component 10 to facilitate subsequent steps.

[0084] Since the second dustproof unit 42 is detachably connected to the shaft unit 32 at one end, and the relative positional error between the other end of the second dustproof unit 42 and the second universal joint 33 is small, the inner diameter of the third clamp 433 is first reduced to the second state by the locking assembly 20. Because the inner diameter of the first dustproof unit 41 at the end near the shaft unit 32 is smaller than the inner diameter of the end of the first dustproof unit 41 away from the shaft unit 32, the end of the first dustproof unit 41 near the shaft unit 32 is easily aligned with the target position on the shaft unit 32. Then, while the locking assembly 20 reduces the inner diameter of the first clamp 431 to the first state, the inner diameter of the second clamp 432 is reduced to the third state by the locking assembly 20. This method allows for more efficient and accurate assembly of the drive shaft. In other embodiments, such as... Figure 3 As shown, the locking assembly 20 includes a first locking unit 21, a second locking unit 22, and a third locking unit 23. The first locking unit 21 can be used to change the inner diameter of the first clamp 431, the second locking unit 22 can be used to change the inner diameter of the second clamp 432, and the third locking unit 23 can be used to change the inner diameter of the third clamp 433. After the third locking unit 23 reduces the inner diameter of the third clamp 433 to the second state, it can keep the third locking unit 23 connected to the third clamp 433. After the locking assembly 20 reduces the inner diameter of the second clamp 432 to the third state, it can keep the second locking unit 22 connected to the second clamp 432. This method can prevent the shaft unit 32 from moving during subsequent operations. The second universal joint 33 may include a second universal module 331, a second housing 332, and a second outer engaging portion 333; the second universal module 331 may be connected to the end of the shaft unit 32 away from the first universal unit 31, the second housing 332 is sleeved on the outer periphery of the second universal module 331 and drives the second universal module 331 to rotate circumferentially; the second outer engaging portion 333 may be recessed from the outer periphery of the second housing 332 toward the inner periphery of the second housing 332; the second universal module 331, the second housing 332, and the shaft unit 32 may form a ball-cage universal joint; Figure 6As shown, the second dustproof unit 42 includes a second dustproof cover 421, a third inner engaging portion 422, and a fourth inner engaging portion 423; the third inner engaging portion 422 and the fourth inner engaging portion 423 are spaced apart along a first direction on the inner circumferential surface of the second dustproof cover 421; the third inner engaging portion 422 and the fourth inner engaging portion 423 are respectively protruding in a ring shape towards the central axis of the second dustproof cover 421; the second outer engaging portion 333, the third inner engaging portion 422, and the third clamp 433 extend along the central axis of the third clamp 433 to the outer circumference of the third clamp 433. The second dust cover 421 is fixed to the outer periphery of the second housing 332 by being sequentially fitted along the wall direction; the first shaft engagement part and the second shaft engagement part can be recessed on the outer periphery of the shaft unit 32; the first shaft engagement part and the second shaft engagement part are sequentially arranged along the second direction; the second shaft engagement part, the fourth inner engagement part 423, and the fourth clamp 434 of the clamp unit 43 are sequentially fitted along the central axis of the fourth clamp 434 to the outer periphery of the fourth clamp 434, and the fourth clamp 434 can lock and fix the relative positions of the second shaft engagement part and the fourth inner engagement part 423. The first dustproof unit 41 also includes a second inner engaging part 413, which protrudes from the inner peripheral wall of the first dustproof cover 411 near the shaft unit 32. The first shaft engaging part, the second inner engaging part 413, and the second clamp 432 are sequentially sleeved along the central axis of the second clamp 432 to the outer peripheral wall of the second clamp 432. The second clamp 432 can lock and fix the relative positions of the first shaft engaging part and the second inner engaging part 413.

[0085] Furthermore, step S12 includes steps S121 and S122, which will be described in detail below. Steps S11, S121, S122, S13, S14, S20, and S30 are executed sequentially.

[0086] In step S121, based on moving the initially assembled drive shaft onto the support assembly 10, the balance assembly 50 can drive the shaft assembly 30 to move along the second direction to the positioning part 112 that abuts against the support assembly 10, so that the locking assembly 20 does not need to obtain the position of the third clamp 433 again before shrinking the inner diameter of the third clamp 433, thereby improving efficiency.

[0087] In step S122, the locking assembly 20 reduces the inner diameter of the third clamp 433 to the second state, so that the relative position of the second dustproof unit 42 near the second universal unit 33 is fixed.

[0088] Example 2:

[0089] This embodiment provides a driveshaft assembly system, which is applied to any of the driveshaft assembly methods described in the above embodiments, such as... Figure 4As shown, the drive shaft assembly system may include a support assembly 10, a locking assembly 20, a first universal joint 31, a dustproof assembly 40, and a balancing assembly 50. The dustproof assembly 40 includes a first dustproof unit 41 and a first clamp 431. The first universal joint 31, the first dustproof unit 41, and the first clamp 431 are sequentially nested together. The first dustproof unit 41 and the first universal joint 31 surround and form a dustproof chamber. The inner circumferential surface of the first dustproof unit 41 within the space surrounded by the first clamp 431 at least partially abuts against the outer circumferential surface of the first universal joint 31. The first dustproof unit 41 applies a first force to the first universal joint 31. The support assembly 10 can be used to support the first universal joint 31 and the dustproof assembly 40. The locking assembly 20 can be used to change the inner diameter of the first clamp 431. The balancing assembly 50 can be used to drive the first dustproof unit 41 and the first universal joint 31, thereby enabling the locking assembly 20 to reduce the inner diameter of the first clamp 431 to a first state.

[0090] The working state of the drive shaft assembly system includes the pre-processing of the first universal joint unit 31 and the dustproof component 40 on the support component 10, the reduction of the pressure difference between the dustproof chamber and the outside atmospheric pressure by the balancing component 50, and the reduction of the inner diameter of the first clamp 431 to the first state by the locking component 20. The pre-processing includes the sequential installation of the first universal joint unit 31, the first dustproof unit 41, and the first clamp 431. The inner circumferential surface of the first dustproof unit 41 within the space surrounded by the first clamp 431 at least partially abuts against the outer circumferential surface of the first universal joint unit 31. The first dustproof unit 41 applies a first force to the first universal joint unit 31, and the first dustproof unit 41 and the first universal joint unit 31 surround and form a dustproof chamber. The first state includes the first dustproof unit 41 applying a second force to the first universal joint unit 31. The first force is less than the second force.

[0091] The balancing component 50 is used to reduce the pressure difference between the dustproof chamber and the outside atmosphere, thereby avoiding two types of adverse effects of pressure imbalance on the first dustproof unit 41: First, it prevents the air pressure inside the dustproof chamber from falling below the outside atmospheric pressure, causing the volume of the first dustproof unit 41 to shrink to less than a first set volume. The first set volume is 80% to 98% of the volume of the first dustproof unit 41 in its natural state; by balancing the air pressure, it can prevent the first dustproof unit 41 from being deformed inward to one side of the dustproof chamber under negative pressure, thereby reducing the excessive wear caused by friction between multiple points on its outer peripheral wall. Second, it prevents the air pressure inside the dustproof chamber from rising above the outside atmospheric pressure, causing the volume of the first dustproof unit 41 to expand to greater than a second set volume. The second set volume is 102% to 120% of the volume of the first dustproof unit 41 in its natural state. By balancing the air pressure, the first dustproof unit 41 can be prevented from bulging outwards away from the dustproof chamber under positive pressure, thus avoiding excessive pressure in the dustproof chamber that would cause lubricant to overflow from the gap between the first dustproof unit 41 and the first universal joint 31 into the external environment. The aforementioned natural state refers to the state of the first dustproof unit 41 when the drive shaft is assembled to the vehicle, the vehicle's steering angle is 0°, and it is stationary on a level road.

[0092] In other embodiments, the balancing assembly 50 may include a balancing unit 51, a ventilating unit 52, a detection unit 53, and a driving unit 54. The balancing unit 51 can be used to drive the first universal joint 31 to move along a first direction and a second direction. The ventilating unit 52 can be inserted between the inner peripheral wall of the first dustproof unit 41 and the outer peripheral wall of the first universal joint 31, allowing airflow to move back and forth between the dustproof chamber and the outside atmosphere more quickly. The detection unit 53 can be used to detect the length of the first dustproof unit 41 along its own axial direction. The driving unit 54 can be used to drive the first dustproof unit 41 to move.

[0093] Furthermore, such as Figure 7 As shown, the first dustproof unit 41 includes a first dustproof cover 411 and a first inner engaging part 412; the first inner engaging part 412 is disposed on the inner peripheral wall of the first dustproof cover 411 in the space surrounded by the first clamp 431.

[0094] The first universal joint 31 includes a first housing 312 and a first outer engaging portion 313; the outer peripheral wall of the first housing 312 is connected to the first outer engaging portion 313; the first outer engaging portion 313 is used to connect to the first inner engaging portion 412.

[0095] After the drive shaft is assembled, the first inner engaging part 412 is connected to the first outer engaging part 313, and the friction between the inner peripheral wall of the first dust cover 411 and the outer peripheral wall of the first housing 312 within the space surrounded by the first clamp 431 achieves the fixation of the relative position of the first housing 312 and the first dust cover 411.

[0096] In other embodiments, such as Figure 2 As shown, the support assembly 10 includes a first support unit 11, a transport unit 12, and a second support unit 13. The first support unit 11 includes a first support portion 111, a positioning portion 112, and a first limiting portion. The first support portion 111 is used to support the shaft unit 32 and the first universal joint unit 31. The first limiting portion, the first support portion 111, and the positioning portion 112 are arranged sequentially along the second direction. The positioning portion 112 is used to position and support the end of the outer peripheral surface of the second universal joint unit 33 that is away from the first universal joint unit 31. The distance between the first limiting portion and the first support portion 111 gradually decreases from top to bottom to form a guide surface. During the process of the drive shaft moving from top to bottom onto the first support portion 111, the first universal joint unit 31 can abut against the guide surface of the first limiting portion and slide relative to it, so that the first universal joint unit 31 can accurately move to abut against the top surface of the first support portion 111. The second support unit 13 is disposed on one side of the first support unit 11 along a third direction; wherein, the third direction is perpendicular to the first direction; the second support unit 13 may include a second support part 131 and a second limiting part 132; the second support part 131 and the second limiting part 132 are arranged sequentially along the second direction; the function of the second support part 131 is the same as that of the first support part 111; the distance between the second limiting part 132 and the second support part 131 gradually decreases from top to bottom to form a guide surface; when the locking assembly 20 reduces the inner diameter of the first clamp 431 to the first state, the transport unit 12 can support Alternatively, the shaft unit 32 can be grasped and moved from the first support portion 111 to the second support portion 131. During this process, the guide surface of the second limiting portion 132 can abut against the end of the second universal joint 33 away from the first universal joint 31, thereby guiding the shaft unit 32 to move accurately to the top surface of the second support portion 131. Subsequently, as the balancing assembly 50 drives the first universal joint 31 to move a fifth predetermined length along the second direction, the end of the second universal joint 33 away from the first universal joint 31 can abut against the straight section of the second limiting portion 132, facilitating the inspection work after the drive shaft assembly. This method, which uses the first support unit 11 as the working area for assembling the drive shaft and the second support unit 13 as the working area for inspecting the assembled drive shaft, can improve work efficiency. Figure 5 As shown, the first universal unit 31 may further include a first universal module 311. The inner peripheral wall of the first universal module 311 is connected to the shaft unit 32 and disposed in the dustproof chamber. The first universal module 311 may be a combination of rolling elements, cages, and star sleeves. The first housing 312 may be the outer shell of a three-ball pin or telescopic ball cage universal joint. The first universal module 311 can move along the axial direction of the first housing 312 in the first housing 312 and drive the first housing 312 to rotate circumferentially.

[0097] Those skilled in the art will understand that the above embodiments are specific examples of implementing this disclosure, and in practical applications, various changes can be made in form and detail without departing from the scope of this disclosure.

Claims

1. A method for assembling a drive shaft, characterized in that, The drive shaft assembly method includes: The first universal joint and the dustproof component are pre-processed on the support component; wherein, the dustproof component includes a first dustproof unit and a first clamp; the pre-processing includes the first universal joint, the first dustproof unit and the first clamp being sequentially sleeved, the inner peripheral surface of the first dustproof unit within the space surrounded by the first clamp at least partially abutting against the outer peripheral surface of the first universal joint, the first dustproof unit applying a first force to the first universal joint, and the first dustproof unit and the first universal joint surrounding each other forming a dustproof chamber; The balancing component reduces the pressure difference between the dustproof chamber and the outside atmospheric pressure; The locking assembly reduces the inner diameter of the first clamp to a first state; wherein, the first state includes the first dustproof unit applying a second force to the first universal unit; the first force is less than the second force.

2. The method for assembling a transmission shaft according to claim 1, characterized in that, The balancing component reduces the pressure difference between the dustproof chamber and the outside atmospheric pressure by including: Obtain the length of the first dust cover of the first dustproof unit along its own axial direction; Based on the fact that the length of the first dust cover along its own axial direction is greater than or equal to a first predetermined length and less than a second predetermined length, the balancing component drives the first housing of the first universal joint to move a predetermined distance along a first direction; wherein, the first direction is the direction from the first dust cover to the first universal joint; the first dust cover includes the first dust cover and a first inner engaging portion, the first inner engaging portion being disposed on the inner peripheral wall of the first dust cover in the space surrounded by the first clamp; the first universal joint includes the first housing and a first outer engaging portion, the first outer engaging portion being disposed on the outer peripheral wall of the first housing.

3. The method for assembling a transmission shaft according to claim 2, characterized in that, The balancing component further reduces the pressure difference between the dustproof chamber and the outside atmospheric pressure by including: Based on the fact that the length of the first dust cover along its own axial direction is greater than or equal to the second set length and less than the third set length, the balancing component drives the first housing to move along the first direction until the first outer engaging part connects with the first inner engaging part.

4. The method for assembling a transmission shaft according to claim 2, characterized in that, The balancing component further reduces the pressure difference between the dustproof chamber and the outside atmospheric pressure by including: Based on the fact that the length of the first dust cover along its own axial direction is greater than the fourth predetermined length and less than the first predetermined length, the balancing component drives the first dust cover to move near the end of the first clamp until it connects with the first outer clamping part and the first inner clamping part.

5. A transmission shaft assembly method according to claim 2, characterized in that, During the process of the first housing of the first universal unit being moved a set distance along a first direction by at least the balancing component, the gap between the outer peripheral wall of the first housing and the inner peripheral wall of the first dust cover is connected to the dustproof chamber and the outside atmosphere through a vent hole; wherein, the first dustproof unit further includes a vent hole, the vent hole passing through both sides of the first inner engaging portion along the axial direction of the first dust cover; the first outer engaging portion is recessed from the outer peripheral wall of the first housing toward the central axis of the first housing; one side of the first inner engaging portion is connected to the inner peripheral wall of the first dust cover, and the other side extends toward the direction close to the central axis of the first dust cover.

6. The method for assembling a transmission shaft according to claim 1, characterized in that, The drive shaft assembly method also includes: Based on the locking component reducing the inner diameter of the first clamp to a first state, the balancing component drives the first universal unit to move a fifth predetermined length along the second direction; wherein, during this step, the volume of the first dustproof unit is reduced; the second direction is the direction from the first universal unit to the first dustproof unit; The balancing component moves to a point where it separates from the first universal joint for a set time; The distance that the first dustproof unit rebounds and drives the first universal unit to move along a first direction is obtained; wherein the first direction is opposite to the second direction. Based on the distance the first dustproof unit rebounds and drives the first universal unit to move along the first direction, and the fifth set length, the assembly qualification is determined.

7. The method for assembling a transmission shaft according to claim 1, characterized in that, The pre-processing of the first universal unit and dustproof component on the support component includes: The pre-assembled driveshaft is moved onto the support assembly; wherein, the shaft assembly includes a first universal joint, a shaft unit, and a second universal joint; the first universal joint, the shaft unit, and the second universal joint are sequentially connected along the axial direction of the shaft unit; the dustproof assembly further includes a second dustproof unit and a clamp unit; the clamp unit includes a first clamp, a second clamp, and a third clamp; the pre-assembled driveshaft includes the first dustproof unit sleeved on the outer periphery of the shaft unit at the end away from the first universal joint, and the second clamp sleeved on the outer periphery of the first dustproof unit at the end away from the first universal joint. One end of the second dustproof unit is sleeved on the outer periphery of the second universal joint, and the other end is detachably connected to the outer periphery of the shaft unit. The third clamp is sleeved on the outer periphery of the second dustproof unit near the end of the second universal joint. The end of the first dustproof unit near the shaft unit applies a third force to the shaft unit, and the end of the second dustproof unit near the second universal joint applies a fourth force to the second universal joint. The second dustproof unit and the first dustproof unit are arranged sequentially along a first direction; the first direction is the direction from the first dustproof unit to the first universal joint. The locking assembly reduces the inner diameter of the third clamp to a second state; wherein, the second state includes the second dustproof unit applying a fifth force to the second universal unit, the fifth force being greater than the fourth force; The locking assembly reduces the inner diameter of the second clamp to a third state; wherein, the third state includes the first dustproof unit applying a sixth force to the shaft unit, the sixth force being greater than the third force; Based on the locking component reducing the inner diameter of the second clamp to the third state, the first universal unit and the dustproof component are pre-processed on the support component.

8. A method for assembling a transmission shaft according to claim 7, characterized in that, The locking assembly reduces the inner diameter of the third clamp to the second state, including: Based on moving the initially assembled drive shaft onto the support assembly, the shaft assembly is driven to move along the second direction to the positioning part that abuts against the support assembly; The locking assembly reduces the inner diameter of the third clamp to the second state.

9. A drive shaft assembly system, characterized in that, The drive shaft assembly system is applied to a drive shaft assembly method according to any one of claims 1-8, and the drive shaft assembly system includes: Support components; Locking components; First universal joint unit; Dustproof components, including a first dustproof unit and a first clamp; Balancing components; The working state of the drive shaft assembly system includes the pre-processing of the first universal joint and the dustproof component on the support component, the balancing component reducing the pressure difference between the dustproof chamber and the outside atmospheric pressure, and the locking component reducing the inner diameter of the first clamp to a first state; wherein, the pre-processing includes the first universal joint, the first dustproof unit, and the first clamp being sequentially fitted, the inner circumferential surface of the first dustproof unit within the space surrounded by the first clamp at least partially abutting the outer circumferential surface of the first universal joint, the first dustproof unit applying a first force to the first universal joint, and the first dustproof unit and the first universal joint surrounding each other forming a dustproof chamber; the first state includes the first dustproof unit applying a second force to the first universal joint; the first force is less than the second force.

10. A drive shaft assembly system according to claim 9, characterized in that, The first dustproof unit includes a first dustproof cover and a first inner engaging part; the first inner engaging part is disposed on the inner peripheral wall of the first dustproof cover in the space surrounded by the first clamp; The first universal joint includes a first housing and a first outer engaging portion; the outer peripheral wall of the first housing is connected to the first outer engaging portion; the first outer engaging portion is used to connect to the first inner engaging portion.

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