Driving shaft assembly and hub bearing connecting system and vehicle

Abstract

The invention discloses a driving shaft assembly and hub bearing connecting system and a vehicle. The driving shaft assembly and hub bearing connecting system comprises a fixing joint, a driving shaft assembly and a hub bearing, the fixing joint comprises a ball cage and a mounting shaft which are connected, an outer spline is arranged on the mounting shaft, and a first limiting groove is formed in the circumferential direction of the mounting shaft; an inner spline is arranged on the inner wall of the hub bearing, the hub bearing is connected with the mounting shaft, and a second limiting groove is formed in the inner wall of the hub bearing in the circumferential direction; and the first limiting piece can be located in a space formed by coupling the first limiting groove and the second limiting groove so as to control a gap between the opposite side surfaces of the ball cage and the hub bearing. According to the invention, the problems of stick-slip abnormal sound in contact with the end surfaces of the driving shaft assembly and the hub bearing and abnormal sound in starting of the whole vehicle are thoroughly solved, and the assembly process of the driving shaft assembly and the hub bearing is simplified.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle equipment, and particularly relates to a drive shaft assembly and hub bearing connection system and a vehicle. Background Art

[0002] The drive shaft assembly for an electric vehicle usually consists of an outer fixed joint, an inner movable joint, and an intermediate shaft rod structure. The outer fixed joint is connected to the hub bearing, and the inner movable joint is connected to the electric drive reducer. The vehicle power is transmitted from the electric drive reducer to the movable joint, the intermediate shaft rod, the fixed joint, and finally to the hub bearing and the wheel.

[0003] The fixed joint includes a connected ball cage and a mounting shaft. In the prior art, when the fixed joint is connected to the hub bearing, the hub bearing sleeves the mounting shaft and is spline-connected to the mounting shaft. At the same time, the end face of the hub bearing abuts against the ball cage, and a half shaft nut is used to fasten one end of the mounting shaft protruding from the hub bearing. When the electric vehicle starts or reverses, due to the large starting torque, the driving wheel is subjected to a large impact torque. The mating surface between the drive shaft assembly fixed joint and the hub bearing may experience stick-slip phenomenon, and then make abnormal noises. Usually, an anti-friction gasket is installed at the mating surface between the fixed joint and the hub bearing to improve the starting abnormal noise problem. The half shaft nut is thread-connected to the mounting shaft and tightened by torque to provide a certain axial clamping force for the hub bearing and the anti-friction gasket. However, if the torque of the half shaft nut is too small, there may be a risk of the nut falling off during operation and the mounting shaft coming out, affecting driving safety; if the torque is too large, it is likely to cause risks such as damage to the coating of the anti-friction gasket, damage to the threads of the half shaft nut or the mounting shaft, and the axial clamping force generated by the half shaft nut is related to the spline fit, the surface coating of the anti-friction gasket, the friction coefficient of the threads and the contact surface, and the accuracy of the tightening equipment, etc., and it is difficult to accurately control the clamping force through the installation torque. Summary of the Invention

[0004] In view of this, the present invention provides a drive shaft assembly and hub bearing connection system and a vehicle to solve the above technical problems.

[0005] The drive shaft assembly and hub bearing connection system provided by the present invention includes:

[0006] A fixed joint, the fixed joint includes a connected ball cage and a mounting shaft, an external spline is provided on the mounting shaft, and a first limiting groove is circumferentially provided on the mounting shaft;

[0007] A hub bearing, an internal spline is provided on the inner wall of the hub bearing, the hub bearing is connected to the mounting shaft, and a second limiting groove is circumferentially provided on the inner wall of the hub bearing;

[0008] A first limiting member, which can be located in the space formed by the coupling of the first limiting groove and the second limiting groove to control the clearance between one surface of the constant velocity joint facing the hub bearing.

[0009] Optionally, the distance between the inner wall of one side of the second limiting groove facing the constant velocity joint and the axis of the hub bearing gradually increases in the direction away from the constant velocity joint.

[0010] Optionally, the cross-section of the second limiting groove in the extending direction of the mounting shaft is set as a right trapezoid, and the hypotenuse of the right trapezoid faces the constant velocity joint.

[0011] Optionally, the included angle between the hypotenuse and the base of the right trapezoid is 50°-70°.

[0012] Optionally, the first limiting member is set as an annular member with an opening.

[0013] Optionally, the ratio of the arc length of the opening to the perimeter of the first limiting member is 1:4-1:3.

[0014] Optionally, the ratio of the distance between the inner wall of one side of the first limiting groove away from the constant velocity joint and the surface of the mounting shaft on the side facing away from the constant velocity joint to the distance between the surface of the mounting shaft on the side facing away from the constant velocity joint and the surface of the constant velocity joint on the side facing the mounting shaft is 1:6-1:4.

[0015] Optionally, the drive shaft assembly and the hub bearing connection system further include:

[0016] A second limiting member, which is detachably connected to the mounting shaft to limit the relative position between the mounting shaft and the hub bearing.

[0017] Optionally, the second limiting member is set as a shaft retaining ring; a third limiting groove is also formed on the mounting shaft, the shaft retaining ring is sleeved in the third limiting groove, and the surface of the shaft retaining ring facing the constant velocity joint abuts against the end face of the hub bearing on the side facing away from the constant velocity joint.

[0018] Optionally, a transition section is provided between the mounting shaft and the constant velocity joint, and the cross-sectional diameter of the transition section in the direction perpendicular to the extending direction of the mounting shaft gradually increases at least partially in the direction towards the constant velocity joint.

[0019] Optionally, the transition section includes a connected first transition section and a second transition section. The first transition section is connected to one end of the mounting shaft facing the constant velocity joint, and the second transition section is connected to one end of the constant velocity joint facing the mounting shaft. The surfaces of the first transition section and the second transition section are both set to be arc-shaped, and the center of the arc corresponding to the first transition section faces the axis of the fixed joint, while the center of the arc corresponding to the second transition section faces away from the axis of the fixed joint.

[0020] The present invention also provides a vehicle, including the drive shaft assembly and hub bearing connection system described in any one of the above.

[0021] The above technical solutions provided by the present invention, compared with the prior art, have at least the following beneficial effects:

[0022] In the present invention, a first limiting groove is provided on the outer wall of the mounting shaft of the fixed joint, and a second limiting groove is correspondingly provided on the inner wall of the hub bearing. When the first limiting sleeve is sleeved on the first limiting groove, compressed and deformed along with the mounting shaft and inserted into the hub bearing to the second limiting groove, it restores its deformation, and thus is simultaneously arranged in the first limiting groove and the second limiting groove, realizing the axial bi-directional limiting of the fixed joint and the hub bearing, abandoning the single-directional axial limiting using the half shaft nut. As a result, the hub bearing and the constant velocity joint of the fixed joint can no longer be in contact, there is no contact mating surface, and thus no stick-slip phenomenon will occur and no abnormal noise will be generated. At the same time, there is no longer a need to provide an anti-friction gasket between the fixed joint and the hub bearing, and more importantly, there is no need to adjust the installation torque of the half shaft nut, thus completely solving the problems of stick-slip abnormal noise at the end face contact between the drive shaft assembly and the hub bearing and abnormal noise during vehicle starting, and simplifying the assembly process of the drive shaft assembly and the hub bearing. Description of the Drawings

[0023] Figure 1 is an exploded view of the drive shaft assembly and hub bearing connection system according to an embodiment of the present invention;

[0024] Figure 2 is Figure 1 an assembled sectional view of the drive shaft assembly and hub bearing connection system shown;

[0025] Figure 3 is Figure 1 a three-dimensional view of the fixed joint of the drive shaft assembly and hub bearing connection system shown;

[0026] Figure 4 is Figure 3 a side view of the fixed joint shown;

[0027] Figure 5 is Figure 1 a sectional view of the hub bearing of the drive shaft assembly and hub bearing connection system shown;

[0028] Figure 6 is Figure 5 a partial enlarged view of the second limiting groove on the inner wall of the hub bearing shown in the figure.

[0029] Reference numerals:

[0030] 1: fixed joint; 101: constant velocity joint; 102: mounting shaft; 1021: external spline; 103: first limiting groove; 104: third limiting groove; 105: transition section; 1051: first transition section; 1052: second transition section; 2: hub bearing; 201: internal spline; 202: second limiting groove; 3: first limiting member; 4: second limiting member. Specific embodiments

[0031] The following further describes the specific embodiments of the present invention with reference to the accompanying drawings.

[0032] It is easily understood that according to the technical solution of the present invention, under the condition of not changing the essence of the present invention, there are various structural forms and implementation modes that can be mutually replaced by those of ordinary skill in the art. Therefore, the following specific embodiments and the accompanying drawings are only exemplary descriptions of the technical solution of the present invention, and should not be regarded as the whole of the present invention or as a limitation or restriction on the technical solution of the invention.

[0033] The orientation terms such as up, down, left, right, front, back, front side, back side, top, bottom, etc. mentioned or possibly mentioned in this specification are defined relative to the structures shown in the respective drawings, and they are relative concepts. Therefore, they may change accordingly according to their different positions and different usage states. Therefore, these or other orientation terms should not be interpreted as restrictive terms.

[0034] Figure 1 is an exploded view of the drive shaft assembly and hub bearing connection system according to an embodiment of the present invention; Figure 2 is Figure 1 an assembled sectional view of the drive shaft assembly and hub bearing connection system shown in the figure; Figure 3 is Figure 1 a three-dimensional view of the fixed joint of the drive shaft assembly and hub bearing connection system shown in the figure; Figure 4 is Figure 3 a side view of the fixed joint shown in the figure; Figure 5 is Figure 1 a sectional view of the hub bearing of the drive shaft assembly and hub bearing connection system shown in the figure.

[0035] As Figures 1-5As shown, the drive shaft assembly and the hub bearing connection system include a fixed joint 1, a hub bearing 2 and a first stopper 3. The fixed joint 1 includes a connected ball cage 101 and a mounting shaft 102, the mounting shaft 102 is provided with an external spline 1021, and the mounting shaft 102 is provided with a first stopper 103 in the circumferential direction; the inner wall of the hub bearing 2 is provided with an internal spline 201, the hub bearing 2 is spline-connected with the mounting shaft 102, and the inner wall of the hub bearing 2 is provided with a second stopper 202 in the circumferential direction; the first stopper 3 can be located in the space formed by the coupling of the first stopper 103 and the second stopper 202 to control the gap between the ball cage 101 and the surface of the hub bearing 2 facing each other.

[0036] During the installation of the fixed joint 1 and the wheel hub bearing 2, the first limiting member 3 is first sleeved in the first limiting groove 103, and the external spline 1021 on the installation shaft 102 is matched with the internal spline 201 on the inner wall of the wheel hub bearing 2 to guide the installation shaft 102 to be inserted into the wheel hub bearing 2. During this process, the first limiting member 3 is compressed and deformed by the extrusion of the internal spline 201 and smoothly passes through the internal spline 201. When the installation shaft 102 moves to the corresponding position of the first limiting groove 103 and the second limiting groove 202, the first limiting member 3 loses the extrusion of the internal spline 201, recovers its deformation and is released into the second limiting groove 202, so that the first limiting member 3 is simultaneously arranged in the first limiting groove 103 and the second limiting groove 202, thereby axially limiting the installation shaft 102 and the wheel hub bearing 2, so that the installation shaft 102 and the wheel hub bearing 2 cannot produce relative movement in the axial direction. Moreover, when the first limiting member 3 is released into the second limiting groove 202, a gap is maintained between the surfaces of the wheel hub bearing 2 and the ball cage 101 facing each other, so that there is no contact between the two.

[0037] The drive shaft assembly and the hub bearing connection system of the present invention is adopted, the first limiting groove 103 is set on the outer wall of the installation shaft 102, and the second limiting groove 202 is correspondingly set on the inner wall of the hub bearing 2. The first limiting member 3 is sleeved on the first limiting groove 103, and when the installation shaft 102 is compressed and deformed and inserted into the hub bearing 2 to the second limiting groove 202, the first limiting member 3 recovers the deformation, so that it is set in the first limiting groove 103 and the second limiting groove 202 at the same time, so as to limit the fixed joint 1 and the hub bearing 2 in the axial direction in both directions, and the method of using the first limiting member 3 to limit the fixed joint 1 and the hub bearing 2 in the axial direction is abandoned. By using the unidirectional axial limiting of the half-shaft nut, the wheel hub bearing 2 and the ball cage 101 of the fixed joint 1 no longer need to abut against each other, and there is no contact mating surface, so there will be no stick-slip phenomenon and no abnormal noise. At the same time, there is no need to set a friction-reducing gasket between the fixed joint 1 and the wheel hub bearing 2, and there is no need to adjust the installation torque of the half-shaft nut. This completely solves the problem of stick-slip noise caused by the end face contact between the drive shaft assembly and the wheel hub bearing 2 and the abnormal noise when the whole vehicle starts, and simplifies the assembly process of the drive shaft assembly and the wheel hub bearing 2.

[0038] like Figure 3 ,Figure 4 As shown, in this embodiment, the first limiting groove 103 is formed on the side of the mounting shaft 102 away from the constant velocity joint 101, and is at a certain distance from the end face of the mounting shaft 102 away from the constant velocity joint 101. As Figure 5 shown, the second limiting groove 202 is formed on the inner wall of the hub bearing 2 and is close to the left end of the internal spline 201, and is in a position-matching correspondence with the first limiting groove 103. When the first limiting groove 103 moves to a position corresponding to the second limiting groove 202 and the first limiting member 3 is simultaneously arranged in both of them, there is a gap between the opposite surfaces of the hub bearing 2 and the constant velocity joint 101. According to the actual application situation, the opening position of the first limiting groove 103 on the mounting shaft 102 and the opening position of the second limiting groove 202 on the hub bearing 2 can be adjusted in a matching manner. The first limiting member 3 can be any elastic structural member. As long as the first limiting member 3 can smoothly enter the hub bearing 2 through compression deformation after being sleeved on the first limiting groove 103 and can restore its deformation at the second limiting groove 202 and expand to the second limiting groove 202 at the same time, the axial directions of the mounting shaft 102 and the hub bearing 2 can be limited. At the same time, as long as there is a gap between the opposite surfaces of the hub bearing 2 and the constant velocity joint 101. As Figure 2 shown, the specific length of the gap L between the opposite surfaces of the hub bearing 2 and the constant velocity joint 101 can be adjusted as required.

[0039] Optionally, the distance between the inner wall of the second limiting groove 202 facing the constant velocity joint 101 and the axis of the hub bearing 2 gradually increases in the direction away from the constant velocity joint 101. With this setting, the inner wall of the second limiting groove 202 facing the constant velocity joint 101 forms an inclined surface, which can not only ensure that when the first limiting member 3 moves to the second limiting groove 202, it can gradually restore its deformation and finally be released into the second limiting groove 202, so as to be clamped in the first limiting groove 103 and the second limiting groove 202 at the same time, and the axial directions of the mounting shaft 102 and the hub bearing 2 are limited, so that the mounting shaft 102 and the hub bearing 2 will not be separated from each other during the working state, but also when it is necessary to disassemble the two, by applying sufficient external force, knocking the end of the mounting shaft 102 away from the constant velocity joint 101, or pulling the inner shaft rod indirectly connected to the fixed joint 1, the first limiting member 3 can gradually compress and deform along the inclined surface with a decreasing cross-sectional diameter in the direction facing the constant velocity joint 101 until it abuts against the internal spline 201 again, and finally the mounting shaft 102 and the hub bearing 2 can be disassembled.

[0040] Figure 6 For Figure 5 a partial enlarged view of the second limiting groove 202 on the inner wall of the hub bearing 2 shown. As Figure 5 、 Figure 6As shown, optionally, the cross-section of the second limiting groove 202 in the extending direction of the mounting shaft 102 is provided as a right trapezoid, and the hypotenuse of the right trapezoid faces the constant velocity joint 101. With this setting, when the first limiting member 3 moves to the second limiting groove 202, it gradually recovers its deformation along the hypotenuse of the second limiting groove 202, and when it moves to the shorter base of the right trapezoid, it recovers its deformation to the greatest extent, so that it is simultaneously arranged in the first limiting groove 103 and the second limiting groove 202 to limit the relative axial displacement between the mounting shaft 102 and the hub bearing 2. At the same time, the first limiting member 3 can also move axially within the length range of the shorter base of the right trapezoid, thus preventing dimensional errors from affecting normal assembly.

[0041] As Figure 6 As shown, the upper side of the second limiting groove 202 is in the direction of the outer wall of the hub bearing 2, the lower side is in the direction of the axis of the hub bearing 2, and the right side is in the direction of the fixed joint 1. The second limiting groove 202 is integrally in the shape of a right trapezoid, and the shorter base of the right trapezoid faces the inner wall direction of the hub bearing 2, the longer base faces the axis direction of the hub bearing 2, and the hypotenuse of the right trapezoid faces the fixed joint 1 direction. The mounting shaft 102 is inserted into the hub bearing 2 from the right side to the left side. Starting from the position where the first limiting member 3 moves to the intersection of the longer base and the hypotenuse of the second limiting groove 202 in a compressed and deformed state, it gradually recovers its deformation along the hypotenuse until it moves to the shorter base of the second limiting groove 202, reaching the maximum degree of deformation recovery. In this embodiment, the length of the shorter base of the right trapezoid is 0.2 - 0.5 mm larger than the width of the first limiting member 3. According to the actual application situation, the angle and the extending length of the hypotenuse of the second limiting groove 202, as well as the extending lengths of the two bases of the right trapezoid, can all be adjusted. In order to prevent dimensional errors and make the assembly work proceed smoothly, the width of the first limiting groove 103 can also be made larger than the width of the first limiting member 3. For example, the first limiting groove 103 is 0.2 mm wider than the first limiting member 3.

[0042] Optionally, the included angle between the hypotenuse and the base of the right trapezoid is 50° - 70°. With this setting, the hypotenuse of the right trapezoid can not only guide the first limiting member 3 to gradually recover its deformation to the greatest extent along it, so as to be smoothly arranged in the first limiting groove 103 and the second limiting groove 202, but also ensure that sufficient strong binding force is provided between the hub bearing 2 and the mounting shaft 102, so that when in the working state, the hub bearing 2 and the mounting shaft 102 will not separate from each other. Moreover, with the help of sufficient external force, the smooth disassembly of the hub bearing 2 and the mounting shaft 102 can be achieved.

[0043] As Figure 6 As shown, in this embodiment, the included angle α between the hypotenuse of the right trapezoid and the longer base on the side facing the axis of the hub bearing 2 is approximately 60°. According to the actual application situation, the specific degree of the included angle α can be appropriately adjusted within the above range.

[0044] Optionally, the first limiting member 3 is set as an annular member with an opening. With this setting, the first limiting member 3 can have a greater degree of telescopic ability through the opening to adapt to the cooperation of the mounting shaft 102 and the hub bearing 2 with different specifications.

[0045] The extended arc of the first limiting member 3 is annular, as Figure 1 shown. In this embodiment, the first limiting member 3 is a circular ring with an opening. According to requirements, it can also be set as an elliptical ring with an opening. The first limiting member 3 is sleeved on the first limiting groove 103. When the mounting shaft 102 is inserted into the hub bearing 2, the first limiting member 3 is deformed by the extrusion of the internal spline 201 in the hub bearing 2, so that the opposite ends of the first limiting member 3 at the opening move towards each other and the distance is shortened. When it moves to the second limiting groove 202, the extrusion effect of the internal spline 201 is lost, and the first limiting member 3 resumes deformation, and the opposite ends at the opening move away from each other, and part of it is released into the second limiting groove 202, so that it is simultaneously arranged in the first limiting groove 103 and the second limiting groove 202 to limit the relative axial movement between the hub bearing 2 and the mounting shaft 102.

[0046] Optionally, the ratio of the arc length of the opening to the perimeter of the first limiting member 3 is 1:4 - 1:3. With this setting, the first limiting member 3 can have sufficient deformation ability and will not be deformed too severely, so that it can be normally arranged in the first limiting groove 103 and the second limiting groove 202 to limit the axial direction of the hub bearing 2 and the mounting shaft 102, and can be reused after the mounting shaft 102 is disassembled.

[0047] As Figure 1 shown. In this embodiment, the ratio of the arc length of the opening of the first limiting member 3 to the perimeter of the first limiting member 3 is about 1:4. According to the actual application situation, this ratio can also be appropriately adjusted.

[0048] Optionally, the ratio of the distance between the inner wall of the first limiting groove 103 on the side away from the constant velocity joint 101 and the surface of the mounting shaft 102 on the side facing away from the constant velocity joint 101 to the distance between the surface of the mounting shaft 102 on the side facing away from the constant velocity joint 101 and the surface of the constant velocity joint 101 facing the mounting shaft 102 is 1:6 - 1:4. The external spline 1021 on the mounting shaft 102 on the side of the first limiting groove 103 facing the constant velocity joint 101 needs to be subjected to other process treatments to enhance its strength and ensure the biting strength between the internal spline 201 and the external spline 1021, that is, to ensure the connection strength between the hub bearing 2 and the mounting shaft 102. Setting the first limiting groove 103 within the above range on the mounting shaft 102 can ensure sufficient connection strength between the hub bearing 2 and the mounting shaft 102, so that during the working process, the hub bearing 2 and the mounting shaft 102 will not release the mutual constraint in the radial direction.

[0049] As Figure 4 shown, in this embodiment, the ratio of the distance L1 between the inner wall of one side of the first limiting groove 103 away from the constant velocity joint 101 and the surface of the mounting shaft 102 on the side facing away from the constant velocity joint 101 to the distance L2 between the surface of the mounting shaft 102 on the side facing away from the constant velocity joint 101 and the surface of the constant velocity joint 101 on the side facing the mounting shaft 102 is approximately 1:6. According to the actual application situation, the specific ratio between L1 and L2 can be adjusted appropriately.

[0050] Optionally, the drive shaft assembly and the hub bearing connection system further include a second limiting member 4, and the second limiting member 4 is detachably connected to the mounting shaft 102 to limit the relative position between the mounting shaft 102 and the hub bearing 2. By adding the second limiting member 4, the relative axial movement between the hub bearing 2 and the mounting shaft 102 is further limited, further preventing the hub bearing 2 and the mounting shaft 102 from separating from each other during operation.

[0051] The second limiting member 4 can be in any structural form and can also adopt any detachable connection method. As long as the mounting shaft 102 and the hub bearing 2 are spline-connected, and after the first limiting member 3 is arranged in the first limiting groove 103 and the second limiting groove 202 at the same time, when the second limiting member 4 is connected to the end of the mounting shaft 102 exposed from the hub bearing 2, it can abut against the hub bearing 2, thereby preventing the mounting shaft 102 from disengaging from the hub bearing 2.

[0052] Optionally, the second limiting member 4 is set as a shaft retaining ring; a third limiting groove 104 is also formed on the mounting shaft 102, the shaft retaining ring is sleeved in the third limiting groove 104, and the surface of the shaft retaining ring facing the constant velocity joint 101 abuts against the end surface of the hub bearing 2 on the side facing away from the constant velocity joint 101. This setting simplifies the detachable connection method between the second limiting member 4 and the mounting shaft 102, and the shaft retaining ring is a standard part, which is easy to obtain and has a low cost.

[0053] As Figure 3 、 Figure 4 shown, in this embodiment, a third limiting groove 104 is circumferentially formed on the mounting shaft 102 on the side of the first limiting groove 103 away from the constant velocity joint 101, and the diameter of the bottom of the third limiting groove 104 is larger than that of the first limiting groove 103, and the distance between the opposite side wall of the third limiting groove 104 and the first limiting groove 103 is 3 - 5 mm. As Figure 1 、 Figure 2As shown, the second limiting member 4 is a standard shaft retaining ring, and its inner diameter is smaller than the diameter of the bottom of the third limiting groove 104. After the mounting shaft 102 is connected to the hub bearing 2 in place, the end of the mounting shaft 102 away from the constant velocity joint 101 protrudes from the hub bearing 2 and just exposes the third limiting groove 104. The width of the exposed third limiting groove 104 is sufficient to sleeved the shaft retaining ring into the third limiting groove 104, so that it tightly clamps the mounting shaft 102 and at the same time abuts against the end face of the hub bearing 2. When the shaft retaining ring needs to be disassembled, use a circlip pliers, insert the jaws into the pliers hole of the shaft retaining ring, and expand the shaft retaining ring to remove it.

[0054] According to the actual application situation, the width and the bottom diameter of the third limiting groove 104 can be appropriately adjusted, as long as the part of the third limiting groove 104 exposed from the hub bearing 2 is sufficient to sleeved the shaft retaining ring, and after the shaft retaining ring is sleeved into the third limiting groove 104, it can abut against the end face of the hub bearing 2 and can cooperate with the first limiting member 3 to jointly restrict the relative axial movement between the hub bearing 2 and the mounting shaft 102.

[0055] Optionally, a transition section 105 is provided between the mounting shaft 102 and the constant velocity joint 101. The cross-sectional diameter of the transition section 105 in the direction perpendicular to the extending direction of the mounting shaft 102 gradually increases at least partially in the direction towards the constant velocity joint 101. With this setting, the contact connection area between the mounting shaft 102 and the constant velocity joint 101 is increased, which is beneficial to increasing the connection strength between the two.

[0056] Optionally, the transition section 105 includes a connected first transition section 1051 and a second transition section 1052. The first transition section 1051 is connected to one end of the mounting shaft 102 towards the constant velocity joint 101, and the second transition section 1052 is connected to one end of the constant velocity joint 101 towards the mounting shaft 102. The surfaces of the first transition section 1051 and the second transition section 1052 are both set to be arc-shaped, and the center of the arc corresponding to the first transition section 1051 faces the axis of the fixed joint 1, and the center of the arc corresponding to the second transition section 1052 deviates from the axis of the fixed joint 1. With this setting, both the cross-sectional area of the first transition section 1051 and the contact area between the second transition section 1052 and the end face of the constant velocity joint 101 are increased, thereby further improving the connection strength between the mounting shaft 102 and the constant velocity joint 101.

[0057] As Figure 3 shown, in this embodiment, the cross-sections of the first transition section 1051 and the second transition section 1052 are both circular, as Figure 4As shown, the bending directions of the arc surfaces of the first transition section 1051 and the second transition section 1052 are opposite. The first transition section 1051 bends towards its axis, and the second transition section 1052 bends away from its axis, causing the first transition section 1051 to bulge outwards away from its axis, thereby increasing its cross-sectional area. Also, one end of the second transition section 1052 facing the ball cage 101 gradually extends away from its axis and finally becomes flush with the end face of the ball cage 101, achieving their fixed connection. Moreover, the first transition section 1051 and the second transition section 1052 have a smooth transition at the connection to prevent stress concentration.

[0058] The present invention also provides a vehicle, including the drive shaft assembly and the hub bearing connection system according to any one of the above embodiments.

[0059] In the vehicle of the present invention, a first limiting groove 103 is provided on the outer wall of the mounting shaft 102, and a second limiting groove 202 is correspondingly provided on the inner wall of the hub bearing 2. When the first limiting member 3 is sleeved on the first limiting groove 103, compressed and deformed along with the mounting shaft 102 and inserted into the hub bearing 2 to the second limiting groove 202, it resumes its deformation, and thus is simultaneously disposed in the first limiting groove 103 and the second limiting groove 202, achieving the axial bi-directional limiting of the fixed joint 1 and the hub bearing 2, abandoning the single-directional axial limiting using the half shaft nut. As a result, the hub bearing 2 and the ball cage 101 of the fixed joint 1 can no longer be in contact, there is no contact mating surface, and thus no stick-slip phenomenon will occur, and no abnormal noise will be generated. At the same time, there is no longer a need to provide an anti-friction gasket between the fixed joint 1 and the hub bearing 2, and it is not necessary to adjust the installation torque of the half shaft nut, thus completely solving the problems of stick-slip abnormal noise at the end face contact between the drive shaft assembly and the hub bearing 2 and abnormal noise during vehicle start-up, and simplifying the assembly process of the drive shaft assembly and the hub bearing 2.

[0060] According to needs, the above technical solutions can be combined to achieve the best technical effect.

[0061] The above are only the principles and preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, based on the principles of the present invention, several other variations can also be made, which should also be regarded as the protection scope of the present invention.

Claims

1. A drive shaft assembly and hub bearing connection system, characterized in that Comprising: A fixed section, the fixed section includes a connected constant velocity joint and a mounting shaft, an external spline is provided on the mounting shaft, and a first limiting groove is circumferentially provided on the mounting shaft; A hub bearing, an internal spline is provided on the inner wall of the hub bearing, the hub bearing is connected to the mounting shaft, and a second limiting groove is circumferentially provided on the inner wall of the hub bearing; A first limiting member, the first limiting member can be located in the space formed by the coupling of the first limiting groove and the second limiting groove to control the gap between one side surface of the constant velocity joint and the hub bearing facing each other.

2. The drive shaft assembly and hub bearing connection system according to claim 1, wherein: The distance between the inner wall of the second limiting groove facing the constant velocity joint and the axis of the hub bearing gradually increases in the direction away from the constant velocity joint.

3. The drive shaft assembly and hub bearing connection system according to claim 2, wherein: The cross-section of the second limiting groove in the extending direction of the mounting shaft is provided as a right trapezoid, and the hypotenuse of the right trapezoid is arranged towards the constant velocity joint.

4. The drive shaft assembly and hub bearing connection system according to claim 3, wherein: The included angle between the hypotenuse and the base of the right trapezoid is 50° - 70°.

5. The drive shaft assembly and hub bearing connection system according to any one of claims 1 - 4, wherein: The first limiting member is provided as an annular member with an opening.

6. The drive shaft assembly and hub bearing connection system according to claim 5, wherein: The ratio of the arc length of the opening to the circumference of the first limiting member is 1:4 - 1:

3.

7. The drive shaft assembly and hub bearing connection system according to any one of claims 1 - 4, wherein: The ratio of the distance between the inner wall of the first limiting groove away from the constant velocity joint and the surface of the mounting shaft facing away from the constant velocity joint to the distance between the surface of the mounting shaft facing away from the constant velocity joint and the surface of the constant velocity joint facing the mounting shaft is 1:6 - 1:

4.

8. The drive shaft assembly and hub bearing connection system according to any one of claims 1-4, characterized in that Further comprising: A second limiting member, the second limiting member is detachably connected to the mounting shaft to limit the relative position between the mounting shaft and the hub bearing.

9. The drive shaft assembly and hub bearing connection system according to claim 8, wherein: The second limiting member is provided as a shaft retaining ring; A third limiting groove is further provided on the mounting shaft, the shaft retaining ring is sleeved in the third limiting groove, and one side surface of the shaft retaining ring facing the constant velocity joint abuts against the end surface of the hub bearing facing away from the constant velocity joint.

10. The drive shaft assembly and hub bearing connection system according to any one of claims 1 - 4, wherein: A transition section is provided between the mounting shaft and the constant velocity joint, and the cross-sectional diameter of the transition section in the direction perpendicular to the extending direction of the mounting shaft at least partially gradually increases in the direction towards the constant velocity joint.

11. The drive shaft assembly and hub bearing connection system according to claim 10, wherein: The transition section includes a connected first transition section and a second transition section. The first transition section is connected to one end of the mounting shaft facing the constant velocity joint, and the second transition section is connected to one end of the constant velocity joint facing the mounting shaft. The surfaces of the first transition section and the second transition section are both set to be arc-shaped, and the center of the arc of the first transition section faces the axis of the fixed joint, while the center of the arc of the second transition section faces away from the axis of the fixed joint.

12. A vehicle, characterized in that, It includes the drive shaft assembly connecting system with the hub bearing as described in any one of claims 1-11.

Images