Assembly tool and assembly method

Abstract

The present application relates to the technical field of automobile transmission system, and particularly relates to an assembly tool and an assembly method. The assembly tool is used for assisting the assembly of a driving shaft and a wheel hub bearing. The wheel hub bearing is provided with a through hole, and the driving shaft is provided with a mounting hole. The assembly tool comprises a first tool and a second tool. The first tool comprises a first indicating circuit, and the second tool comprises a second indicating circuit. The first tool is inserted into the mounting hole, the driving shaft is inserted into the through hole, and then the second tool is inserted into the other side of the through hole. The first indicating circuit corresponds to the second indicating circuit. The assembly method uses the above assembly tool. The present application provides an assembly tool and an assembly method. When the end face spline assembly of the driving shaft and the wheel hub bearing is performed, whether the end face spline of the driving shaft and the wheel hub bearing is successfully engaged can be detected, so that the assembly of the driving shaft and the wheel hub bearing is ensured.

Description

Technical Field

[0001] This invention relates to the field of automotive transmission system technology, and more particularly to an assembly tooling and assembly method. Background Technology

[0002] In the automotive industry, drive shafts and wheel bearings typically use face spline connections. A face spline connection involves setting end splines on the contacting end faces of both the drive shaft and the wheel bearing. The meshing of these end splines allows for a tighter transmission between the drive shaft and the wheel bearing. Specifically, the wheel bearing end face has multiple first spline teeth, and the drive shaft end face has multiple second spline teeth. The first and second spline teeth directly mesh and are then locked together by a central bolt, ensuring a tight engagement of the two end splines and achieving a gapless connection between the drive shaft and the wheel bearing. Compared to traditional gear connections, face spline connections offer significant advantages such as higher torque capacity, better NVH performance, lighter unsprung mass, and easier assembly and maintenance.

[0003] However, since the meshing end faces of the drive shaft and wheel hub bearings are located inside the shaft hole of the steering knuckle, the steering knuckle will obscure the meshing end faces during end face spline assembly, making them invisible. Therefore, after the drive shaft and wheel hub bearings are fixed, it is not easy for operators to check whether the end face splines are properly assembled, which can easily lead to a false meshing state of tooth tip to tooth tip. Consequently, after the vehicle rolls off the production line, the drive shaft and wheel hub bearings cannot transmit torque, which can easily cause abnormal noise and damage, increasing the cost of parts and labor. Summary of the Invention

[0004] The purpose of this invention is to provide an assembly fixture that can detect whether the end splines of the drive shaft and the wheel hub bearing are successfully engaged during the end spline assembly of the drive shaft and the wheel hub bearing, so as to ensure that the two are assembled in place.

[0005] The present invention also aims to provide an assembly method that can further detect whether the end face splines of the drive shaft and the wheel hub bearing are successfully engaged during the end face spline assembly of the drive shaft and the wheel hub bearing, so as to ensure that the two are assembled in place.

[0006] Based on the aforementioned first objective, the present invention provides an assembly fixture for assisting in the assembly of a drive shaft and a wheel hub bearing, wherein the wheel hub bearing is provided with a through hole and the drive shaft is provided with a mounting hole; The assembly fixture includes: The first tooling can be inserted into the mounting hole and has a first indicator circuit; The second tooling can be inserted into the through hole and has a second indicator circuit; The first tooling is inserted into the mounting hole, the drive shaft is inserted into the through hole, and after the second tooling is inserted into the other side of the through hole, the first indicator circuit corresponds to the second indicator circuit. When the first indicator circuit and the second indicator circuit are in contact, they form a circuit and issue an indication signal that the assembly is in place; when they are not in contact, they form an open circuit.

[0007] Furthermore, the first tooling includes a first positioning shaft that matches the mounting hole, and the second tooling includes a second positioning shaft that matches the through hole; The first positioning shaft of the first tooling is inserted into the mounting hole, the drive shaft is inserted into the through hole, and after the second positioning shaft of the second tooling is inserted into the other side of the through hole, the first indicator circuit corresponds to the second indicator circuit.

[0008] Furthermore, the first tooling also includes a first body, the first positioning shaft is disposed at the shaft end of the first body, and the first indicating circuit is disposed on the first body; The second tooling also includes a second body, the second positioning shaft is disposed at the shaft end of the second body, and the second indicating circuit is disposed on the second body; The first body is a shaft, and the diameter of the first body is larger than the diameter of the first positioning shaft, so that a first positioning shoulder is formed between the first body and the first positioning shaft. After the first positioning shaft is inserted into the mounting hole, the first positioning shoulder abuts against the end face of the drive shaft. And / or, the second body is a shaft, and the diameter of the second body is smaller than the diameter of the second positioning shaft.

[0009] Furthermore, the first indicator circuit is embedded inside the first body; the first indicator circuit includes a power supply, a first wire and a second wire, one end of the first wire is connected to the positive terminal of the power supply and the other end is exposed on the end face of the first body, one end of the second wire is connected to the negative terminal of the power supply and the other end is exposed on the end face of the first body. The second indicator circuit is embedded inside the second body; the second indicator circuit includes an indicator device, a third wire and a fourth wire, one end of the third wire is connected to the indicator device and the other end is exposed on the end face of the second body, one end of the fourth wire is connected to the indicator device and the other end is exposed on the end face of the second body; When the first indicating circuit is in contact with the second indicating circuit, the first body is in contact with the second body, so that the first wire is in contact with the third wire, and the second wire is in contact with the fourth wire, thereby the indicating device emits an indicating signal.

[0010] Furthermore, the first body has a first connecting part on the side away from the first positioning axis, and the second body has a second connecting part on the side away from the second positioning axis. When the first indicator circuit contacts the second indicator circuit, the first connecting part and the second connecting part are connected, so that the first tooling and the second tooling form an integrated assembly tooling, thereby the entire assembly tooling can be pulled out from the side of the through hole away from the drive shaft.

[0011] Furthermore, the first connecting part is a first magnetic attractor, and the second connecting part is a second magnetic attractor, and the first magnetic attractor and the second magnetic attractor can be magnetically connected.

[0012] Furthermore, both the first magnetic attractor and the second magnetic attractor are annular magnetic bodies, and both the first indicator circuit and the second indicator circuit are disposed in the hollow structure of the annular magnetic body.

[0013] Furthermore, a limiting part is provided on the side of the second positioning shaft away from the second body. The limiting part is a shaft body, and the diameter of the limiting part is larger than the diameter of the second positioning shaft, so that a second positioning shoulder is formed between the limiting part and the second positioning shaft. After the second positioning shaft is inserted into the through hole, the second positioning shoulder abuts against the end face of the wheel hub bearing.

[0014] Furthermore, a handle is provided on the side of the limiting part away from the second positioning axis.

[0015] By adopting the above technical solution, the assembly tooling of the present invention has at least the following beneficial effects: When assembling the drive shaft and the hub bearing, first insert the first tooling into the mounting hole, then insert the drive shaft with the first tooling inserted into the through hole, and then insert the second tooling into the other side of the through hole. At this time, the first indicator circuit and the second indicator circuit correspond to each other.

[0016] The system allows for a direct assessment of whether the drive shaft and wheel hub bearing are properly assembled, based on whether the first and second indicating circuits are in contact and form a circuit path, i.e., whether they can emit an indicating signal. If the first and second indicating circuits are in contact, forming a circuit and emitting an indicating signal, it indicates that the drive shaft and wheel hub bearing are properly assembled. If the first and second indicating circuits are not in contact, forming an open circuit and unable to emit an indicating signal, it indicates that the drive shaft and wheel hub bearing are not properly assembled. Therefore, operators can quickly and accurately determine whether the drive shaft and wheel hub bearing are properly assembled without visually inspecting the spline interface, effectively avoiding false engagement problems caused by steering knuckle obstruction and reducing the risk of disengagement.

[0017] Based on the second objective mentioned above, the present invention provides an assembly method that uses the aforementioned assembly fixture to assemble a drive shaft and a hub bearing, wherein the hub bearing is provided with a through hole and the drive shaft is provided with a mounting hole. The assembly method includes: Step 100: Insert the first positioning shaft of the first tooling into the mounting hole, so that the shoulder of the first positioning shaft abuts against the end face of the drive shaft; Step 200: Insert the drive shaft into the through hole, and then insert the second positioning shaft of the second tooling into the other side of the through hole, so that the shoulder of the second positioning shaft abuts against the end face of the wheel hub bearing. At this time, the first indicator circuit and the second indicator circuit correspond to each other. Step 300: Observe the state of the indicator device in the second indicator circuit; If the indicating device issues an indication signal, it indicates that the first indicating circuit is in contact with the second indicating circuit, at which point the drive shaft and the hub bearing are properly assembled. If the indicator device remains unchanged, it indicates that the first indicator circuit and the second indicator circuit are not in contact, and at this time the drive shaft and the hub bearing are not properly assembled.

[0018] Furthermore, it also includes a step 400 set after step 300, step 400 including: When the drive shaft and the wheel hub bearing are assembled in place, the first connecting part and the second connecting part are connected, so that the first tooling and the second tooling form an integral assembly tooling. The assembly tooling is pulled out from the side of the through hole away from the drive shaft, and then the threaded part is screwed into the mounting hole through the through hole to connect the drive shaft and the wheel hub bearing. When the drive shaft and the hub bearing are not properly assembled, the drive shaft is rotated circumferentially along the hub bearing, and a force is applied to the drive shaft along the axial direction close to the hub bearing until the indicating device issues an indication signal. At this time, the first connecting part and the second connecting part are connected, so that the first tooling and the second tooling form an integrated assembly tooling. The entire assembly tooling is pulled out from the side of the through hole away from the drive shaft, and then the threaded part is screwed into the mounting hole through the through hole to connect the drive shaft and the hub bearing.

[0019] By adopting the above technical solution, the assembly method of the present invention has at least the following beneficial effects: By using the assembly tooling described above through the assembly method, the assembly method possesses all the advantages of the aforementioned assembly tooling, which will not be elaborated further here. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the structure for assembling a drive shaft and a wheel hub bearing using assembly tooling, provided in an embodiment of the present invention. Figure 2 This is a structural schematic diagram of the first tooling in the assembly fixture provided in an embodiment of the present invention; Figure 3 This is a structural schematic diagram of the second tooling in the assembly tooling provided in an embodiment of the present invention; Figure 4 This is a schematic diagram of the structure of the first indicator circuit and the second indicator circuit in the assembly tooling provided in an embodiment of the present invention.

[0022] Figure label: 1-Drive shaft; 11-Mounting hole; 2-Hub bearing; 21-Through hole; 3-First tooling; 31-First indicating circuit; 311-Power supply; 312-First wire; 313-Second wire; 32-First positioning shaft; 33-First body; 34-First positioning shaft shoulder; 35-First connecting part; 4-Second tooling; 41-Second indicating circuit; 411-Indicating device; 412-Third wire; 413-Fourth wire; 42-Second positioning shaft; 43-Second body; 44-Limiting part; 45-Second positioning shaft shoulder; 46-Handle; 47-Second connecting part. Detailed Implementation

[0023] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0025] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0026] Example 1 Please see Figure 1 The present invention provides an assembly fixture for assisting in the assembly of the end face spline connection between the drive shaft 1 and the hub bearing 2.

[0027] In the drive system of new energy vehicles, the wheel hub bearing 2 is usually provided with a through hole 21 located in the center. The end of the drive shaft 1 is designed with an end face spline, and a mounting hole 11 is provided at the center of the end face spline. The mounting hole 11 is a threaded hole, which is used to screw in bolts and other threaded parts to achieve locking. The drive shaft 1 can be inserted into the through hole 21 axially and transmit torque through the engagement of the end face spline.

[0028] Please combine Figure 2 and Figure 3 The assembly fixture includes a first fixture 3 and a second fixture 4. The first fixture 3 is used to be installed at the end of the drive shaft 1, and the second fixture 4 is used to be installed on the outside of the through hole 21 of the wheel hub bearing 2. The two fixtures convert the invisible internal state of whether the end face spline is in place into a visible indicator signal such as light or sound by the conduction and disconnection of the circuit when they are in contact, thereby realizing the visual judgment of the assembly state.

[0029] Specifically, the first fixture 3 can be inserted into the mounting hole 11 and has a first indicating circuit 31; the second fixture 4 can be inserted into the through hole 21 and has a second indicating circuit 41. After the first fixture 3 is inserted into the mounting hole 11, the drive shaft 1 is inserted into the through hole 21, and then the second fixture 4 is inserted into the other side of the through hole 21, the first indicating circuit 31 and the second indicating circuit 41 correspond to each other. When the first indicating circuit 31 and the second indicating circuit 41 are in contact, they form a circuit and issue an indication signal that the assembly is in place; when they are not in contact, they form an open circuit.

[0030] The first tooling 3 also includes a first positioning shaft 32 that matches the mounting hole 11 and can be inserted into the mounting hole 11; the second tooling 4 also includes a second positioning shaft 42 that matches the through hole 21 and can be inserted into the through hole 21.

[0031] With this setup, when assembling the drive shaft 1 and the hub bearing 2, firstly, the first positioning shaft 32 of the first tooling 3 is inserted into the mounting hole 11, then the drive shaft 1 with the first tooling 3 inserted is inserted into the through hole 21 as a whole, and then the second positioning shaft 42 of the second tooling 4 is inserted into the other side of the through hole 21. At this time, the first indicator circuit 31 and the second indicator circuit 41 correspond to each other.

[0032] If the drive shaft 1 and the hub bearing 2 are properly assembled, the first indicator circuit 31 and the second indicator circuit 41 will be in contact, forming a circuit and issuing an indicator signal. Therefore, the indicator signal issued by the first indicator circuit 31 and the second indicator circuit 41 indicates that the drive shaft 1 and the hub bearing 2 are properly assembled. If the drive shaft 1 and the hub bearing 2 are not properly assembled, the first indicator circuit 31 and the second indicator circuit 41 will not be in contact, forming an open circuit. Therefore, no indicator signal can be issued. Thus, the failure of the first indicator circuit 31 and the second indicator circuit 41 to issue an indicator signal indicates that the drive shaft 1 and the hub bearing 2 are not properly assembled.

[0033] It should be added that the through hole 21 is designed to pass through the hub bearing 2, and can form two openings on the two opposite end faces of the hub bearing 2. If the drive shaft 1 is inserted into the through hole 21 through one opening, the second positioning shaft 42 is inserted into the through hole 21 through the other opening. That is, the drive shaft 1 and the second positioning shaft 42 are respectively inserted into the through hole 21 through the two openings.

[0034] In addition, the first positioning shaft 32 is matched with the mounting hole 11 on the drive shaft 1 and is used to insert into the mounting hole 11 to achieve the positioning of the first tooling 3 on the drive shaft 1; the second positioning shaft 42 is matched with the through hole 21 of the wheel hub bearing 2 and is used to insert into the through hole 21 from the side away from the drive shaft 1 to achieve the positioning of the second tooling 4 on the wheel hub bearing 2.

[0035] Preferably, the fit between the first positioning shaft 32 and the mounting hole 11 on the drive shaft 1 can be a clearance fit to ensure easy insertion without wobbling. The fit between the second positioning shaft 42 and the through hole 21 on the wheel hub bearing 2 is also preferably a clearance fit.

[0036] Therefore, after the first positioning shaft 32 is inserted into the mounting hole 11, the drive shaft 1 is inserted into the through hole 21, and the second positioning shaft 42 is inserted into the other side of the through hole 21, when the two connecting lines of the first indicating circuit 31 and the second indicating circuit 41 come into contact, a complete current path is formed, and an indicating signal is emitted, such as an indicator light being lit or a status change, indicating that the drive shaft 1 and the hub bearing 2 have been assembled in place. When there is an open circuit between the first indicating circuit 31 and the second indicating circuit 41, and no indicating signal is emitted, it indicates that the assembly is not in place.

[0037] With this configuration, when assembling the drive shaft 1 and the wheel hub bearing 2, the operator can intuitively determine whether the drive shaft 1 and the wheel hub bearing 2 are properly assembled based on whether the first indicator circuit 31 and the second indicator circuit 41 are in contact to form a circuit path, or whether the first indicator circuit 31 and the second indicator circuit 41 can issue an indicator signal. Therefore, the operator does not need to visually inspect the spline interface on the end face to quickly and accurately determine whether the drive shaft 1 and the wheel hub bearing 2 are properly assembled, effectively avoiding false engagement caused by steering knuckle obstruction and reducing the risk of disengagement.

[0038] Please see Figure 2 and Figure 3 In the above embodiments, the first tooling 3 further includes a first body 33, a first positioning shaft 32 is disposed at the shaft end of the first body 33, and a first indicator circuit 31 is disposed on the first body 33; the second tooling 4 further includes a second body 43, a second positioning shaft 42 is disposed at the shaft end of the second body 43, and a second indicator circuit 41 is disposed on the second body 43.

[0039] With this configuration, when the first positioning shaft 32 is inserted into the mounting hole 11 on the drive shaft 1, the drive shaft 1 is inserted into the through hole 21 on the hub bearing 2, and the second positioning shaft 42 is inserted into the through hole 21 from the other side, if the outer end face of the first body 33 and the outer end face of the second body 43 are in contact with each other, the first indicator circuit 31 and the second indicator circuit 41 will contact each other to form a complete circuit and issue an indicator signal to indicate that the drive shaft 1 and the hub bearing 2 have been assembled in place.

[0040] If the outer end face of the first body 33 does not contact the outer end face of the second body 43, then the first indicator circuit 31 and the second indicator circuit 41 are open-circuited and no indicator signal will be issued, indicating that the drive shaft 1 and the hub bearing 2 are not properly assembled.

[0041] In this configuration, the first fixture 3 provides a unified mounting base for the first positioning shaft 32 and the first indicating circuit 31 via the first body 33. The first positioning shaft 32 achieves precise positioning with the mounting hole 11 of the drive shaft 1, and the first indicating circuit 31 is integrated into the first body 33. Similarly, the second fixture 4 provides a unified mounting base for the second positioning shaft 42 and the second indicating circuit 41 via the second body 43. The second positioning shaft 42 achieves precise positioning with the through hole 21 of the wheel hub bearing 2, and the second indicating circuit 41 is integrated into the second body 43. This structure highly integrates the positioning function and the circuit detection function, clearly defines the responsibilities of each component, and avoids assembly errors and reliability degradation caused by dispersed arrangement.

[0042] Optionally, the first positioning shaft 32 and the first body 33 can be integrally formed, or they can be separate structures, which are connected to form the first tooling 3; the second positioning shaft 42 and the second body 43 can be integrally formed, or they can be separate structures, which are connected to form the second tooling 4.

[0043] Preferably, the first positioning shaft 32 is integrally formed with the first body 33, and the second positioning shaft 42 is integrally formed with the second body 43.

[0044] This configuration, where the first positioning shaft 32 and the first indicating circuit 31 both use the first body 33 as a common reference, and the second positioning shaft 42 and the second indicating circuit 41 both use the second body 43 as a common reference, ensures the relative positional relationship between the positioning shafts and the indicating circuits through a single machining process of the body, eliminating the cumulative assembly errors inherent in split structures. When the first positioning shaft 32 is inserted into the mounting hole 11 of the drive shaft 1 and the second positioning shaft 42 is inserted into the through hole 21 of the wheel hub bearing 2, the contact positions of the indicating circuits on the two bodies are precisely positioned, ensuring the accuracy of circuit continuity judgment and avoiding misjudgments caused by positional deviations.

[0045] Please see Figure 4 In any of the above embodiments, the first indicator circuit 31 is embedded inside the first body 33; the first indicator circuit 31 includes a power supply 311, a first wire 312 and a second wire 313. The power supply is preferably a button battery with a rated voltage of 3V, such as CR2032 or CR2025. These batteries are small in size, have moderate capacity and are easy to replace.

[0046] One end of the first wire 312 is connected to the positive terminal of the power supply 311, and the other end is exposed on the end face of the first body 33. One end of the second wire 313 is connected to the negative terminal of the power supply 311, and the other end is exposed on the end face of the first body 33. The second indicator circuit 41 is embedded inside the second body 43. The second indicator circuit 41 includes an indicator device 411, a third wire 412, and a fourth wire 413. One end of the third wire 412 is connected to the indicator device 411, and the other end is exposed on the end face of the second body 43. One end of the fourth wire 413 is connected to the indicator device 411, and the other end is exposed on the end face of the second body 43. When the first indicator circuit 31 and the second indicator circuit 41 are in contact, the first body 33 and the second body 43 are in contact, so that the first wire 312 is in contact with the third wire 412, and the second wire 313 is in contact with the fourth wire 413, thereby the indicator device 411 emits an indicator signal.

[0047] In other words, in the initial separation state, the first indicator circuit 31 is not an independent closed loop. The first wire 312 is led out from the positive terminal of the power supply 311 to the end face contact, and the second wire 313 is led out from the negative terminal of the power supply 311 to another end face contact. These two contacts are mutually insulated on the end face. Therefore, the entire circuit of the first indicator circuit 31 does not form a loop inside itself. The power supply 311 does not output current to the outside and is in standby mode, consuming almost no power.

[0048] Similarly, the second indicator circuit 41 is not an independent closed loop. In the second indicator circuit 41, the third wire 412 and the fourth wire 413 are respectively connected to the two ends of the indicator device 411 and led out to the end face contact. The indicator device 411 itself will not light up when no external power supply is connected. Therefore, both circuits are open when they exist alone.

[0049] Only when the end faces of the first tooling 3 and the second tooling 4 are in contact, the contact of the first wire 312 contacts the contact of the third wire 412, and the contact of the second wire 313 contacts the contact of the fourth wire 413. At this time, a complete current path is formed, and the current flows through the indicating device, causing it to issue an indicating signal.

[0050] The first indicator circuit 31 is embedded inside the first body 33, with only exposed contact points on its end face. This enclosed embedded structure effectively prevents the first indicator circuit 31 from being damaged by external oil, dust, and mechanical impacts, thus improving the durability of the tooling. Similarly, the second indicator circuit 41 is embedded inside the second body 43, with only exposed contact points on its end face. This enclosed embedded structure effectively prevents the first indicator circuit 31 from being damaged by external oil, dust, and mechanical impacts, thus improving the durability of the tooling.

[0051] Preferably, the exposed ends of the first conductor 312 and the second conductor 313 are flush with or slightly higher than the end face of the first body 33 to ensure reliable contact. The exposed ends of the third conductor 412 and the fourth conductor 413 are flush with or slightly higher than the end face of the second body 43 to form reliable contact with the first conductor 312 and the second conductor 313.

[0052] For example, the indicator 411 is preferably an indicator light, such as an LED light, or other sound and light indicator elements such as a buzzer, vibrator or small display screen.

[0053] It should be noted that if the end face of the first body 33 is in contact with the end face of the second body 43, then the exposed end of the first wire 312 is in contact with the exposed end of the third wire 412, and the exposed end of the second wire 313 is in contact with the exposed end of the fourth wire 413. The power supply 311, the first wire 312, the third wire 412, the indicating device 411, the fourth wire 413, and the second wire 313 are sequentially connected to form a complete closed circuit. The indicating device 411 is energized and sends an indication signal. If the indicator light illuminates, it indicates that the spline on the end face of the drive shaft 1 and the hub bearing 2 has been properly assembled. If the end face of the first body 33 is not in contact with the end face of the second body 43, then there is an open circuit between the aforementioned wire pairs, and the indicating device 411 does not send a signal, indicating that the assembly is not complete.

[0054] In the above embodiment, the power supply 311 is disposed on the first fixture 3, and the indicating device 411 is disposed on the second fixture 4. In another embodiment, the power supply 311 and the indicating device 411 can both be disposed on the same fixture, for example, both on the second fixture 4, while the first fixture 3 only serves as a short-circuit connector. Specifically, the end face of the first fixture 3 only has two short-circuited wire contacts and does not contain a power supply, while the second fixture 4 contains the power supply 311, the indicating device 411, and the wires. When the two fixtures are in contact, the short-circuit circuit of the first fixture 3 short-circuits the two wire contacts on the second fixture 4, thereby forming a loop in the internal circuit of the second fixture 4, and the indicating device 411 emits an indicating signal.

[0055] Optionally, the first body 33 is a shaft, and the diameter of the first body 33 is larger than the diameter of the first positioning shaft 32, so that a first positioning shoulder 34 is formed between the first body 33 and the first positioning shaft 32. After the first positioning shaft 32 is inserted into the mounting hole 11, the first positioning shoulder 34 abuts against the end face of the drive shaft 1; or, the second body 43 is a shaft, and the diameter of the second body 43 is smaller than the diameter of the second positioning shaft 42.

[0056] Preferably, please refer to Figure 2 and Figure 3The first body 33 is a shaft, and the diameter of the first body 33 is larger than the diameter of the first positioning shaft 32, so that a first positioning shoulder 34 is formed between the first body 33 and the first positioning shaft 32. After the first positioning shaft 32 is inserted into the mounting hole 11, the first positioning shoulder 34 abuts against the end face of the drive shaft 1; and the second body 43 is a shaft, and the diameter of the second body 43 is smaller than the diameter of the second positioning shaft 42.

[0057] With this configuration, the first positioning shoulder 34 abuts against the end face of the drive shaft 1, thereby achieving axial positioning of the first tooling 3 on the drive shaft 1 and preventing the first positioning shaft 32 from being over-inserted.

[0058] In addition, when the second positioning shaft 42 is inserted into the through hole 21 from the side away from the drive shaft 1, since the diameter of the second body 43 is smaller than the diameter of the second positioning shaft 42, it maintains a sufficient safety gap with the inner wall of the wheel hub bearing 2, which effectively reduces the risk of mechanical interference between the second body 43 and the wheel hub bearing 2, and ensures that the second tooling 4 can be smoothly and unobstructedly inserted into the through hole 21, reducing the difficulty of operation.

[0059] Please see Figure 2 and Figure 3 and combined Figure 1 In any of the above embodiments, the first body 33 is provided with a first connecting part 35 on the side away from the first positioning shaft 32, and the second body 43 is provided with a second connecting part 47 on the side away from the second positioning shaft 42. When the first indicator circuit 31 contacts the second indicator circuit 41, the first connecting part 35 and the second connecting part 47 are connected, so that the first tooling 3 and the second tooling 4 form an integrated assembly tooling, so that the entire assembly tooling can be pulled out from the side of the through hole 21 away from the drive shaft 1.

[0060] With this configuration, when the end face of the first body 33 comes into contact with the end face of the second body 43, the first indicator circuit 31 and the second indicator circuit 41 are connected, the indicator device 411 sends a signal, and at the same time the first connecting part 35 and the second connecting part 47 are connected to each other. At this time, the first tooling 3 and the second tooling 4 are combined to form an integrated assembly tooling.

[0061] After the operator confirms that the assembly is in place, the second tooling 4 is pulled directly. Since the first tooling 3 and the second tooling 4 are connected to each other through the first connecting part 35 and the second connecting part 47, the first tooling 3 will move together with the second tooling 4. Therefore, the operator does not need to reach into the assembly area to remove the first tooling 3 separately. With just one pull, the assembly tooling can be completely pulled out from the side away from the drive shaft 1 through the through hole 21. This simplifies the operation process and improves the assembly efficiency.

[0062] For example, the first connecting part 35 and the second connecting part 47 can be implemented in various ways such as magnetic, snap-fit, or adhesive, and can be flexibly selected according to different usage scenarios and cost requirements.

[0063] For example, the first connecting part 35 can be an elastic claw with barbs, and the second connecting part 47 is an annular groove that matches the claw. When the two tooling end faces come into contact, the elastic claw opens under pressure and then snaps into the groove to achieve mechanical locking. This mechanical snap-fit ​​structure can realize the connection and integrated extraction functions.

[0064] In any of the above embodiments, preferably, the first connecting part 35 is a first magnetic attractor and the second connecting part 47 is a second magnetic attractor, and the first magnetic attractor and the second magnetic attractor can be magnetically connected.

[0065] The first magnetic attractor 35 and the second magnetic attractor 47 can be a combination of a permanent magnet and a magnetic conductor, such as an iron ring, which can generate an attraction force between them.

[0066] Preferably, both the first magnetic attractor and the second magnetic attractor are annular magnetic bodies, the first indicator circuit 31 is disposed in the hollow structure of the annular magnetic body, and the second indicator circuit 41 is disposed in the hollow structure of the annular magnetic body.

[0067] A ring magnet provides uniform magnetic attraction across its entire circumference and has a self-centering function when fixtures approach each other, automatically guiding the end faces of two fixtures to align, thus ensuring accurate connection of circuit contacts. The end face of the magnet can be flush with the end face of the body or slightly concave to avoid direct contact and collision without affecting the conduction of magnetic lines of force.

[0068] In other words, the first magnetic attractor is a ring-shaped magnetic body, fixed to the end face of the first body 33, and surrounding the exposed ends of the first wire 312 and the second wire 313. The second magnetic attractor is a ring-shaped magnetic body, fixed to the end face of the second body 43, and surrounding the exposed ends of the third wire 412 and the fourth wire 413, and corresponding to the position of the first magnetic attractor.

[0069] For example, the first magnetic attractor can be a permanent magnet, such as a neodymium magnet or a ferrite magnet, or it can be a magnetic conductor made of soft magnetic material, depending on the design requirements. The second magnetic attractor can also be a permanent magnet or a magnetic conductor made of soft magnetic material. When at least one of the first and second magnetic attractors is a permanent magnet, they can form a magnetic connection.

[0070] With this configuration, when the end face of the first body 33 and the end face of the second body 43 approach and contact each other, the magnetic force between the first magnetic attractor and the second magnetic attractor will automatically attract them together. Under the action of the magnetic force, the first wire 312 and the third wire 412, and the second wire 313 and the fourth wire 413 are assisted to press and contact each other, which improves the reliability of circuit contact. At the same time, the first tooling 3 and the second tooling 4 are firmly connected by magnetic attraction to form an integrated assembly tooling.

[0071] When the operator pulls the second tooling 4, the magnetic attraction can drive the first tooling 3 to move together with the second tooling 4, so that the entire assembly tooling can be pulled out from the side of the through hole 21 away from the drive shaft 1. When it is necessary to store or replace and it is necessary to separate the first tooling 3 and the second tooling 4, the operator only needs to apply an appropriate separation force to overcome the magnetic attraction and separate the two.

[0072] In summary, in this invention, the first and second magnetic components are magnetically connected, automatically engaging when the first fixture 3 and the second fixture 4 come into contact. This eliminates the need for additional alignment, snapping, or tightening by the operator, simplifying the operation and reducing operational difficulty. Furthermore, the magnetic components possess self-centering properties during engagement, guiding the end faces of the first fixture 3 and the second fixture 4 to accurate alignment, resulting in more precise contact between the exposed ends of the wires. Simultaneously, the magnetic force provides continuous clamping force, ensuring good wire contact and preventing poor contact due to vibration or slight misalignment, thus improving the reliability of the indicating circuit.

[0073] Please see Figure 3 and combined Figure 1 In any of the above embodiments, a limiting part 44 is provided on the side of the second positioning shaft 42 away from the second body 43. The limiting part 44 is a shaft body, and the diameter of the limiting part 44 is larger than the diameter of the second positioning shaft 42, so that a second positioning shoulder 45 is formed between the limiting part 44 and the second positioning shaft 42. After the second positioning shaft 42 is inserted into the through hole 21, the second positioning shoulder 45 abuts against the end face of the wheel hub bearing 2, which will produce a clear sense of obstruction and a visual positioning mark.

[0074] In other words, the second positioning shaft 42 is matched with the through hole 21 of the hub bearing 2, and its outer diameter is slightly smaller than the inner diameter of the through hole 21, so as to ensure that the second positioning shaft 42 can be smoothly inserted into the through hole 21. The diameter of the limiting part 44 is larger than the diameter of the through hole 21, so it cannot enter the interior of the through hole 21.

[0075] When the operator inserts the second positioning shaft 42 into the through hole 21 of the hub bearing 2 away from the drive shaft 1, the second positioning shaft 42 moves along the through hole 21 toward the drive shaft 1. When the second positioning shaft 42 is inserted to a certain depth, the second positioning shoulder 45 formed between the limiting part 44 and the second positioning shaft 42 abuts against the end face of the hub bearing 2, preventing the second tooling 4 from continuing to move into the through hole 21.

[0076] At this time, the insertion depth of the second body 43 and the second positioning shaft 42 of the second tooling 4 is accurately defined, and the end face of the second body 43 is located at a predetermined axial position in the through hole 21, ensuring that when the drive shaft 1 and the hub bearing 2 are assembled in place, the end face of the first body 33 and the end face of the second body 43 can just contact each other.

[0077] Therefore, by setting the limiting part 44, the depth of the second tooling 4 inserted into the through hole 21 of the hub bearing 2 is uniquely determined. When the drive shaft 1 passes through the through hole 21 along the axis of the hub bearing 2, if the end face spline is assembled in place, the end face of the drive shaft 1 and the mating surface inside the hub bearing 2 are in the correct position. At this time, the end face of the first body 33 of the first tooling 3 and the end face of the second body 43 of the second tooling 4 are in contact, the indicator circuit is turned on, and the indicator device 411 sends a signal.

[0078] If the end face spline is not properly assembled, such as a problem with the tooth tipping, the drive shaft 1 cannot be fully inserted to the predetermined depth. Consequently, the end face of the first body 33 of the first tooling 3 will be in a more outward position and will not be able to contact the end face of the second body 43. The indicator circuit will remain open, and the indicator device 411 will have no signal.

[0079] This design ensures that the limiting part 44 actively prevents further movement after the second positioning shaft 42 is inserted into place, avoiding excessive insertion of the second tooling 4 due to excessive force applied by the operator. It also prevents the second positioning shaft 42 from impacting the drive shaft 1 fixed section or the internal structure of the wheel hub bearing 2, protecting the tooling and assembly from damage. Furthermore, by providing a larger diameter limiting part 44 on the second positioning shaft 42, forming a second positioning shoulder 45, the insertion depth of the second tooling 4 is precisely limited. This positioning method is simple and reliable, requiring no external measurement or adjustment, ensuring that the end face of the second tooling 4 is in a fixed axial position each time it is used.

[0080] Please see Figure 3 In any of the above embodiments, a handle 46 is provided on the side of the limiting part 44 away from the second positioning axis 42, that is, at the outermost end of the second tooling 4.

[0081] It should be noted that the shape and size of the handle 46 can be designed according to ergonomic requirements. The handle 46 is used by the operator to grip and perform the insertion, adjustment and removal operations of the second tooling 4.

[0082] For example, the handle 46 can be plate-shaped, shaft-shaped, T-shaped, spherical, or ring-shaped, making it convenient for people with different operating habits to use.

[0083] Optionally, the handle 46 and the limiting part 44 can be configured as an integral molding structure, such as by machining or injection molding, or they can be configured as separate structures and fixedly connected by threaded connection, interference fit or bonding.

[0084] During the assembly of drive shaft 1 and hub bearing 2, the operator holds handle 46 and inserts the second positioning shaft 42 of the second tooling 4 into the through hole 21 of hub bearing 2 until the second positioning shoulder 45 of the limiting part 44 abuts against the end face of hub bearing 2. When it is necessary to rotate drive shaft 1 to adjust the spline engagement state of the end face, the operator can keep handle 46 still or slightly adjust the position of handle 46 as needed. After confirming that the assembly is in place, the operator directly pulls handle 46 to pull the second tooling 4 together with the first tooling 3 connected to it out of the through hole 21.

[0085] Therefore, the design of the handle 46 allows the operator to apply axial force easily and stably, avoiding tooling misalignment or jamming caused by unstable grip, thus improving operating efficiency and success rate.

[0086] In summary, the assembly fixture provided by this invention has a simple structure, low cost, and convenient operation. It can be applied without large-scale modifications to existing assembly lines, significantly improving the reliability and efficiency of end-face spline assembly. It has high industrial practical value and is particularly suitable for the large-scale production of new energy vehicles. Furthermore, when using this assembly fixture, only two simple fixtures, the first fixture 3 and the second fixture 4, need to be added during the assembly process. There is no need to modify traditional assembly lines or add inspection stations, greatly reducing the cost and time required for technology upgrades and demonstrating promising industrial application prospects.

[0087] Example 2 Example 2 provides an assembly method using the assembly fixture described in Example 1. The technical features of the assembly fixture disclosed in Example 1 are also applicable to this example, and the technical features of the assembly fixture disclosed in Example 1 will not be described again. The implementation of the assembly method will be further described in detail below with reference to the accompanying drawings.

[0088] Please see Figure 1 The assembly method uses the above-mentioned assembly fixture to assemble the drive shaft 1 and the hub bearing 2. The hub bearing 2 is provided with a through hole 21, and the drive shaft 1 is provided with a mounting hole 11, so that the drive shaft 1 can be inserted into the through hole 21.

[0089] Assembly methods include: Step 100: Insert the first positioning shaft 32 of the first tooling 3 into the mounting hole 11, so that the first positioning shaft shoulder 34 abuts against the end face of the drive shaft 1.

[0090] Step 200: Insert the drive shaft 1 into the through hole 21, and then insert the second positioning shaft 42 of the second tooling 4 into the other side of the through hole 21, so that the second positioning shaft shoulder 45 abuts against the end face of the wheel hub bearing 2. At this time, the first indicator circuit 31 corresponds to the second indicator circuit 41.

[0091] Step 300: Observe the state of the indicator device 411 in the second indicator circuit 41.

[0092] If the indicator device 411 issues an indicator signal, it indicates that the first indicator circuit 31 is in contact with the second indicator circuit 41, and the drive shaft 1 and the hub bearing 2 are in place. If the indicator device 411 does not change, it indicates that the first indicator circuit 31 and the second indicator circuit 41 are not in contact, and the drive shaft 1 and the hub bearing 2 are not in place.

[0093] In other words, step 100 achieves axial positioning of the first tooling 3 on the drive shaft 1. At this point, the first tooling 3 is fixed to the end face of the fixed section of the drive shaft 1, and the end face of the first body 33 is located in a predetermined position. Step 200 precisely limits the insertion depth of the second tooling 4 in the through hole 21. The first indicating circuit 31 and the second indicating circuit 41 correspond axially, meaning that the exposed wires on the end faces of the first body 33 and the second body 43 are within a contactable distance range. Step 300 determines whether the splines on the end faces of the drive shaft 1 and the hub bearing 2 have accurately engaged. The indicating device 411 responds instantly, without waiting or complex analysis, making it suitable for the cycle time requirements of mass production lines and effectively improving assembly efficiency.

[0094] This setup simplifies the assembly process, allowing operators to master it without complex training, thus reducing the possibility of human error. Furthermore, by monitoring changes in the indicator device 411, such as the indicator light turning on or off, operators can intuitively and quickly determine whether the end face spline is properly assembled, without relying on experience or visual inspection, effectively solving the problem of unknown assembly status in existing technologies. Additionally, when the indicator device 411 remains unchanged, indicating incomplete assembly, the operator can actively adjust it by rotating the drive shaft 1 and applying axial force until the indicator signal appears, ensuring the end face spline is truly engaged. This avoids the risk of disengagement during driving due to false engagement, improving vehicle safety.

[0095] Please see Figure 1 In the above embodiment, the assembly method further includes a step 400 disposed after step 300, step 400 including: When the drive shaft 1 and the hub bearing 2 are assembled in place, the first connecting part 35 and the second connecting part 47 are connected, so that the first tooling 3 and the second tooling 4 form an integrated assembly tooling. The assembly tooling is pulled out from the side away from the drive shaft 1 through the through hole 21, and then the threaded part is screwed into the mounting hole 11 through the through hole 21 to connect the drive shaft 1 and the hub bearing 2.

[0096] When the drive shaft 1 and the hub bearing 2 are not properly assembled, the drive shaft 1 is rotated circumferentially along the hub bearing 2, and a force is applied to the drive shaft 1 along the axial direction close to the hub bearing 2 until the indicating device 411 issues an indicating signal. The purpose of the rotation is to rotate the spline teeth on the end face of the drive shaft 1 relative to the tooth groove of the hub bearing 2 by an angle. When the teeth on the drive shaft 1 are aligned with the tooth groove on the hub bearing 2, the axial thrust will force the drive shaft 1 into position instantly, producing a slight clicking sound. At the same time, the drive shaft 1 moves forward a certain distance. This displacement causes the first tooling 3 to move forward as well, and its end face contacts the end face of the second tooling 4. At this time, the circuit is turned on, and the indicating device 411 issues an indicating signal. The above adjustment process is simple and intuitive, requiring no disassembly of any parts or special tools. Moreover, once the indicator device 411 issues an indication signal, it means that the spline has been correctly engaged, and the operator can confidently proceed to the next step.

[0097] When the indicating device 411 issues an indicating signal, the first connecting part 35 connects with the second connecting part 47, so that the first tooling 3 and the second tooling 4 form an integrated assembly tooling. The entire assembly tooling is pulled out from the side of the through hole 21 away from the drive shaft 1. At this time, the through hole 21 and the mounting hole 11 are completely exposed. Then, the threaded part is passed through the through hole 21 and screwed into the mounting hole 11 to connect the drive shaft 1 and the wheel hub bearing 2. During the tightening of the threaded part, the end face spline will fit more tightly under the action of axial tension, eliminating the gap between the two and realizing a gapless and high-rigidity connection between the drive shaft 1 and the wheel hub bearing 2. Finally, check whether the threaded part is tightened in place, and the assembly process is completed.

[0098] With this configuration, the assembly method of the present invention allows the first connecting part 35 and the second connecting part 47 to automatically connect when assembled, forming an integrated structure with the first tooling 3 and the second tooling 4. The operator only needs to pull out both toolings simultaneously with a single action; the first tooling 3 and the second tooling 4 will not separate, eliminating the need for separate removal operations. This simplifies the process and improves efficiency. When the indicating device 411 remains unchanged, the method clearly provides adjustment instructions, guiding the operator to actively eliminate the tooth-on-tooth state until the indicating signal appears. This adjustment method is simple and effective, requiring no disassembly and reassembly, thus avoiding rework and time waste due to assembly failure.

[0099] During the adjustment process before assembly is complete, the first connecting part 35 and the second connecting part 47 do not function when they are not in contact. However, once they are adjusted and in contact, they automatically connect immediately without any additional operation. At the same time, the holding force of the magnetic component ensures that the first tooling 3 does not fall off when the tooling is subsequently removed, thus serving both connection and retention functions.

[0100] The assembly method described in this embodiment has the advantages of the assembly tooling described in Embodiment 1, which has been explained in detail in Embodiment 1 and will not be repeated here.

[0101] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An assembly tooling, characterized in that, For assembling the drive shaft (1) and the hub bearing (2), the hub bearing (2) is provided with a through hole (21), and the drive shaft (1) is provided with a mounting hole (11). The assembly fixture includes: The first tooling (3) can be inserted into the mounting hole (11) and has a first indicator circuit (31). The second tooling (4) can be inserted into the through hole (21) and has a second indicator circuit (41). After the first tooling (3) is inserted into the mounting hole (11), the drive shaft (1) is inserted into the through hole (21), and the second tooling (4) is inserted into the other side of the through hole (21), the first indicator circuit (31) corresponds to the second indicator circuit (41); When the first indicator circuit (31) and the second indicator circuit (41) are in contact, they form a circuit and issue an indication signal that the assembly is in place; when they are not in contact, they form an open circuit.

2. The assembly fixture according to claim 1, characterized in that, The first tooling (3) includes a first positioning shaft (32) that matches the mounting hole (11), and the second tooling (4) includes a second positioning shaft (42) that matches the through hole (21). After the first positioning shaft (32) of the first tooling (3) is inserted into the mounting hole (11) and the drive shaft (1) is inserted into the through hole (21), and the second positioning shaft (42) of the second tooling (4) is inserted into the other side of the through hole (21), the first indicator circuit (31) corresponds to the second indicator circuit (41).

3. The assembly fixture according to claim 2, characterized in that, The first tooling (3) also includes a first body (33), the first positioning shaft (32) is disposed at the shaft end of the first body (33), and the first indicator circuit (31) is disposed on the first body (33). The second tooling (4) also includes a second body (43), the second positioning shaft (42) is disposed at the shaft end of the second body (43), and the second indicator circuit (41) is disposed on the second body (43). Wherein, the first body (33) is a shaft, and the diameter of the first body (33) is greater than the diameter of the first positioning shaft (32), so that a first positioning shoulder (34) is formed between the first body (33) and the first positioning shaft (32). After the first positioning shaft (32) is inserted into the mounting hole (11), the first positioning shoulder (34) abuts against the end face of the drive shaft (1); and / or, the second body (43) is a shaft, and the diameter of the second body (43) is smaller than the diameter of the second positioning shaft (42).

4. The assembly fixture according to claim 3, characterized in that, The first indicator circuit (31) is embedded inside the first body (33); the first indicator circuit (31) includes a power supply (311), a first wire (312) and a second wire (313). One end of the first wire (312) is connected to the positive terminal of the power supply (311), and the other end is exposed on the end face of the first body (33). One end of the second wire (313) is connected to the negative terminal of the power supply (311), and the other end is exposed on the end face of the first body (33). The second indicator circuit (41) is embedded inside the second body (43); the second indicator circuit (41) includes an indicator device (411), a third wire (412) and a fourth wire (413), one end of the third wire (412) is connected to the indicator device (411) and the other end is exposed on the end face of the second body (43), one end of the fourth wire (413) is connected to the indicator device (411) and the other end is exposed on the end face of the second body (43); When the first indicator circuit (31) contacts the second indicator circuit (41), the first body (33) contacts the second body (43), so that the first wire (312) contacts the third wire (412), and the second wire (313) contacts the fourth wire (413), thereby the indicator device (411) emits an indicator signal.

5. The assembly fixture according to claim 3, characterized in that, The first body (33) has a first connecting part (35) on the side away from the first positioning shaft (32), and the second body (43) has a second connecting part (47) on the side away from the second positioning shaft (42). When the first indicator circuit (31) contacts the second indicator circuit (41), the first connecting part (35) and the second connecting part (47) are connected, so that the first tooling (3) and the second tooling (4) form an integrated assembly tooling, so that the assembly tooling as a whole can be pulled out from the side of the through hole (21) away from the drive shaft (1).

6. The assembly fixture according to claim 5, characterized in that, The first connecting part (35) is a first magnetic attractor, and the second connecting part (47) is a second magnetic attractor. The first magnetic attractor and the second magnetic attractor can be magnetically connected.

7. The assembly fixture according to claim 6, characterized in that, Both the first magnetic attractor and the second magnetic attractor are ring-shaped magnetic bodies, and both the first indicator circuit (31) and the second indicator circuit (41) are located in the hollow structure of the ring-shaped magnetic body.

8. The assembly tooling according to any one of claims 3-7, characterized in that, A limiting part (44) is provided on the side of the second positioning shaft (42) away from the second body (43). The limiting part (44) is a shaft body. The diameter of the limiting part (44) is larger than the diameter of the second positioning shaft (42), so that a second positioning shoulder (45) is formed between the limiting part (44) and the second positioning shaft (42). After the second positioning shaft (42) is inserted into the through hole (21), the second positioning shoulder (45) abuts against the end face of the hub bearing (2).

9. The assembly fixture according to claim 8, characterized in that, A handle (46) is provided on the side of the limiting part (44) away from the second positioning axis (42).

10. An assembly method, characterized in that, The assembly fixture according to any one of claims 1-9 is used to assemble the drive shaft (1) and the hub bearing (2), wherein the hub bearing (2) is provided with a through hole (21) and the drive shaft (1) is provided with a mounting hole (11). The assembly method includes: Step 100: Insert the first positioning shaft (32) of the first tooling (3) into the mounting hole (11) so that the first positioning shaft shoulder (34) abuts against the end face of the drive shaft (1); Step 200: Insert the drive shaft (1) into the through hole (21), and then insert the second positioning shaft (42) of the second tooling (4) into the other side of the through hole (21), so that the second positioning shaft shoulder (45) abuts against the end face of the wheel hub bearing (2). At this time, the first indicator circuit (31) corresponds to the second indicator circuit (41). Step 300: Observe the state of the indicator device (411) in the second indicator circuit (41); If the indicator device (411) issues an indicator signal, it indicates that the first indicator circuit (31) is in contact with the second indicator circuit (41), at which time the drive shaft (1) and the hub bearing (2) are assembled in place; If the indicator device (411) remains unchanged, it indicates that the first indicator circuit (31) and the second indicator circuit (41) are not in contact, and at this time the drive shaft (1) and the hub bearing (2) are not properly assembled.

11. The assembly method according to claim 10, characterized in that, It also includes a step 400 set after step 300, step 400 including: When the drive shaft (1) and the hub bearing (2) are assembled in place, the first connecting part (35) and the second connecting part (47) are connected, so that the first tooling (3) and the second tooling (4) form an integrated assembly tooling. The assembly tooling is pulled out from the side away from the drive shaft (1) of the through hole (21), and the threaded part is screwed into the mounting hole (11) through the through hole (21) to connect the drive shaft (1) and the hub bearing (2). When the drive shaft (1) and the hub bearing (2) are not assembled in place, the drive shaft (1) is rotated around the circumference of the hub bearing (2), and a force is applied to the drive shaft (1) in the direction close to the hub bearing (2) along the axial direction until the indicator device (411) issues an indicator signal. At this time, the first connecting part (35) and the second connecting part (47) are connected, so that the first tooling (3) and the second tooling (4) form an integrated assembly tooling. The assembly tooling is pulled out from the side of the through hole (21) away from the drive shaft (1), and the threaded part is screwed into the mounting hole (11) through the through hole (21) to connect the drive shaft (1) and the hub bearing (2).

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