A half shaft assembly and automobile

Abstract

The present application relates to the field of vehicle chassis transmission technology, and discloses a half-axle assembly and a car. The half-axle assembly is used to connect the half-axle gear and the wheel. The half-axle assembly includes a half-axle, a first connecting plate and a plurality of first connecting bolts; the first connecting plate is arranged along the circumference of the half-axle, and the first connecting plate is provided with a plurality of first mounting holes corresponding to the first connecting bolts one by one, and the first connecting bolt includes a head and a rod, and the rod passes through the first mounting hole; the rod and the first mounting hole are limited in relative rotation by an anti-slip structure, and / or, the half-axle or the first connecting plate is provided with a limiting portion, and the head is provided with a matching portion, and the matching portion is in contact with the limiting portion, which is used to limit the rotation of the first connecting bolt relative to the first mounting hole. When the half-axle assembly is used, it can realize the rotation restriction of the wheel connecting bolt, improve the reliability of the half-axle assembly, and make the wheel not easy to loosen during the driving process of the car.

Description

Technical Field

[0001] The present application relates to the technical field of vehicle chassis transmission, and in particular to a half-axle assembly and a vehicle. Background Art

[0002] The half-axle assembly is located at the end of the vehicle transmission system. It generally includes a half-axle and a half-axle bearings, which are used to connect the differential and the wheel, transmit the torque of the reducer assembly to the wheel, and withstand the vertical force, longitudinal force, lateral force and bending moment caused by the lateral force from the wheel. With the development of the automobile industry, higher requirements are placed on the load-bearing capacity of the vehicle, which requires the half-axle assembly to have higher reliability.

[0003] In the related art, the connecting bolts on the half-axle used to connect the wheels are easy to rotate, which may cause the wheels to loosen. In mild cases, it may cause abnormal noise in the car. In severe cases, it may cause the connecting bolts to break and the wheels to loosen, making the reliability of the half-axle assembly low.

[0004] Therefore, how to provide a solution to solve or alleviate the above-mentioned defects is a technical problem that needs to be solved urgently by those skilled in the art. Utility Model Content

[0005] The purpose of the present application is to provide a half-axle assembly to limit the rotation of the wheel connecting bolts, improve the reliability of the half-axle assembly, and make the wheel less likely to loosen during the driving of the car. Another purpose of the present application is to provide a car.

[0006] In order to solve the above technical problems, the present application provides a half-shaft assembly for connecting a half-shaft gear and a wheel, wherein the half-shaft assembly includes a half-shaft, a first connecting plate and a plurality of first connecting bolts;

[0007] The first connection plate is arranged along the circumference of the half shaft, and the first connection plate is provided with a plurality of first mounting holes corresponding to the first connection bolts one by one, and the first connection bolt comprises a head and a rod, and the rod passes through the first mounting hole;

[0008] The rod portion and the first mounting hole are restricted in relative rotation by an anti-slip structure, and / or the half-shaft or the first connecting plate is provided with a limiting portion, and the head is provided with a matching portion, which is in contact with the limiting portion, for restricting the first connecting bolt from rotating relative to the first mounting hole.

[0009] Optionally, the anti-slip structure includes an anti-slip protrusion, and at least one of the outer side wall of the rod portion and the inner side wall of the first mounting hole is provided with the anti-slip protrusion;

[0010] Alternatively, the anti-slip structure includes a key and a key slot, and one of the outer side wall of the rod portion and the inner side wall of the first mounting hole is provided with the key, and the other is provided with the key slot.

[0011] Optionally, the anti-slip protrusion is a straight knurling.

[0012] Optionally, the mating portion is a plane or a concave curved surface or a convex curved surface, and a limiting seat is circumferentially provided on the outer side wall of the semi-shaft or the end face of the first connecting disk, and the limiting portion is a mating surface on the limiting seat that matches the mating portion.

[0013] Optionally, the rear portion of the half-shaft includes a first shaft segment and a second shaft segment in the axial direction, the second shaft segment is located between the first shaft segment and the first connecting plate, the outer diameter of the first shaft segment is smaller than the outer diameter of the second shaft segment, the first shaft segment forms a mounting position for a wheel decorative cover, the second shaft segment forms a mounting position for a brake drum of the brake, and the first connecting bolt is used to connect the wheel decorative cover and the brake drum.

[0014] Optionally, the half-shaft assembly further includes a half-shaft bearing and a stopper;

[0015] The half-shaft bearing is sleeved on the half-shaft, the limiting member is arranged on the half-shaft, the limiting member abuts against the front end surface of the half-shaft bearing, and is used to limit the half-shaft from moving axially toward one side of the wheel relative to the half-shaft bearing.

[0016] Optionally, the limiting member comprises a fastening sleeve; the fastening sleeve is interference fit with the half shaft, and the rear end face of the fastening sleeve is pressed against the front end face of the half shaft bearing;

[0017] Or, the limiting member includes a retaining ring; the outer side wall of the half shaft is provided with a mounting groove adapted to the retaining ring along the circumferential direction, a portion of the retaining ring is located in the mounting groove, and the rear end face of the retaining ring is pressed against the front end face of the half shaft bearing;

[0018] Alternatively, the limiting member includes a fastening sleeve and a retaining ring; the fastening sleeve is interference fit with the half-shaft, the outer wall of the half-shaft is circumferentially provided with a mounting groove adapted to the retaining ring, part of the retaining ring is located in the mounting groove, the rear end face of the fastening sleeve is pressed against the front end face of the half-shaft bearing, and the rear end face of the retaining ring is pressed against the front end face of the fastening sleeve.

[0019] Optionally, the half-shaft assembly further includes a ring gear;

[0020] When the limiting member includes a fastening sleeve, the gear ring is sleeved on the fastening sleeve, the gear ring is used to cooperate with the wheel speed sensor, and the outer side wall of the fastening sleeve also forms the installation position of the half-shaft oil seal assembly.

[0021] Optionally, the half-shaft assembly further includes a half-shaft bearing and a plurality of second connecting bolts;

[0022] The outer side wall of the half-shaft bearing is provided with a second connection plate along the circumferential direction, and the second connection plate is provided with a plurality of second mounting holes corresponding to the second connection bolts one by one;

[0023] The outer side wall of the half-shaft bearing is circumferentially provided with a mounting seat, and the mounting seat is located on the side of the second connecting plate away from the wheel. The mounting seat forms a mounting position for the brake base plate and the bridge housing, and the second connecting bolt is used to connect the brake base plate and the bridge housing, and / or the outer side wall of the second connecting plate is constructed to be partially concave to form at least one recessed portion, and the recessed portion forms at least a partial installation space of the brake cylinder.

[0024] The present application also provides a car, comprising the axle assembly.

[0025] The semi-axle assembly provided by the present application is provided with a first connecting plate on the semi-axle, a first mounting hole corresponding to the first connecting bolt is provided on the first connecting plate, and the rod of the first connecting bolt and the first mounting hole are limited to rotate relative to each other through an anti-skid structure, and the anti-skid structure can be used to limit the rotation of the first connecting bolt relative to the first connecting plate after the corresponding nut is tightened. The semi-axle assembly provided by the present application is provided with a limiting portion on the semi-axle or the first connecting plate, and a matching portion is provided on the head of the first connecting bolt, and the matching portion is contacted with the limiting portion, and the matching portion and the limiting portion can be used to limit the rotation of the first connecting bolt relative to the first connecting plate after the corresponding nut is tightened. Whether it is an anti-skid structure or a matching limiting structure formed by the matching portion and the limiting portion, the first connecting bolt is not easy to break, and the connection between the wheel and the semi-axle is more stable, so that the reliability of the semi-axle assembly can be improved, so that the wheel is not easy to loosen during the driving process of the car, and the car safety accidents can be reduced. When the semi-axle assembly provided by the present application is provided with an anti-skid structure and a matching limiting structure at the same time, the double rotation restriction of the first connecting bolt can be realized, and the reliability of the semi-axle assembly can be improved to a greater extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A partial cross-sectional view of a half-shaft assembly according to an embodiment of the present application;

[0027] Figure 2 for Figure 1 A schematic diagram of the structure of the middle half shaft and the first connecting plate;

[0028] Figure 3 for Figure 2 A front view of the middle half shaft and the first connecting plate;

[0029] Figure 4 for Figure 1A schematic diagram of the structure of the first connecting bolt;

[0030] Figure 5 for Figure 1 A partial schematic diagram of the middle half shaft assembly;

[0031] Figure 6 for Figure 1 A schematic diagram of the structure of the middle fastening sleeve;

[0032] Figure 7 for Figure 1 Schematic diagram of the structure of the middle half shaft bearing.

[0033] The reference numerals in the above drawings are described as follows:

[0034] 1-semi-axle, 11-limiting seat, 111-limiting part, 12-mounting groove, 13-first shaft section, 14-second shaft section, 15-spline;

[0035] 2-semi-shaft bearing, 21-outer ring, 22-second connecting plate, 221-second mounting hole, 222-recessed portion, 23-mounting seat, 24-inner ring, 25-tapered roller, 26-sealing ring;

[0036] 3-first connecting plate, 31-first mounting hole;

[0037] 4-first connecting bolt, 41-head, 411-matching portion, 42-rod;

[0038] 5-fastening sleeve, 51-third shaft section, 52-fourth shaft section, 53-fifth shaft section, 54-pressing surface, 55-inner hole;

[0039] 6- retaining ring;

[0040] 7- second connecting bolt;

[0041] 8-gear ring;

[0042] 9- Anti-slip structure. DETAILED DESCRIPTION

[0043] In order to enable those skilled in the art to better understand the present application, the present application is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0044] In the description of the present application, it should be noted that: in the half-axle assembly provided in the embodiment of the present application, the head end of the half-axle 1 is used to connect the half-axle gear, and the tail end is used to connect the wheel. The "head end" of the half-axle 1 and other components is the end away from the wheel, corresponding to Figure 1 The right end of the "tail end" is the end close to the wheel, corresponding to Figure 1 The left end of Figure 1-3 , the direction indicated by the arrows in 5-6.

[0045] The term “several” as used in this application refers to an indefinite number of multiples, usually more than two; and when “several” is used to indicate the number of certain components, it does not indicate the quantitative relationship between these components.

[0046] The terms "first", "second", etc. mentioned in this application are only used to facilitate the description of two or more structures or components with the same or similar structures and / or functions, and do not imply any special limitation on the order and / or importance.

[0047] Please refer to Figures 1 to 4 , Figure 1 This is a partial cross-sectional view of the half-shaft assembly of the embodiment provided in this application. Figure 2 for Figure 1 Schematic diagram of the structure of the middle half shaft and the first connecting plate, Figure 3 for Figure 2 The front view of the middle half shaft and the first connecting plate, Figure 4 for Figure 1 Schematic diagram of the structure of the first connecting bolt.

[0048] In the embodiments provided in this application, Figure 1 As shown, the half-shaft assembly includes a half-shaft 1, a first connecting plate 3 and a plurality of first connecting bolts 4. The head end of the half-shaft 1 is used to connect the half-shaft gear (not shown in the figure), and the tail end is used to connect the wheel (not shown in the figure); Figure 2 and Figure 3 As shown, the first connection plate 3 is arranged along the circumference of the half shaft 1, and the first connection plate 3 is provided with a plurality of first mounting holes 31 corresponding to the first connection bolts 4 one by one; Figure 1 and Figure 4 As shown, the first connecting bolt 4 includes a head 41 and a rod 42, and the rod 42 passes through the first mounting hole 31; the rod 42 and the first mounting hole 31 are restricted in relative rotation by the anti-slip structure 9; the half shaft 1 is provided with a limiting portion 111, and the head 41 is provided with a matching portion 411, which is in contact with the limiting portion 111, and is used to limit the rotation of the first connecting bolt 4 relative to the first mounting hole 31.

[0049] With such arrangement, after the corresponding nut is tightened on the first connecting bolt 4, the anti-slip structure 9 can be used to limit the rotation of the first connecting bolt 4 relative to the first mounting hole 31, and the matching limiting structure formed by the matching portion 411 and the limiting portion 111 can also be used to limit the rotation of the first connecting bolt 4 relative to the first mounting hole 31, thereby realizing double rotation restriction of the first connecting bolt 4, making it difficult for the first connecting bolt 4 to break, and making the connection between the wheel and the half-axle 1 more stable, thereby improving the reliability of the half-axle assembly, making it difficult for the wheel to loosen during driving of the vehicle, thereby reducing the occurrence of vehicle safety accidents.

[0050] It is understandable that the two rotation limiting structures, the anti-skid structure 9 and the matching limiting structure, can be set selectively or simultaneously as described in the above embodiment, and the present application does not limit this. Obviously, the effect of setting both simultaneously is better, which can not only improve the limiting effect of the rotation of the first connecting bolt 4, making the connection of the first connecting bolt 4 more stable, but also can use the other rotation limiting structure to continue to limit the rotation of the first connecting bolt 4 when any rotation limiting structure fails. For example, when the anti-skid structure 9 fails first, the matching limiting structure can continue to stably limit the rotation of the first connecting bolt 4, and the rotation limiting time is longer. It can also cooperate with regular maintenance, and replace the corresponding components in time when the rotation limiting structure fails, thereby greatly improving the reliability of the half-axle assembly.

[0051] It is worth noting that, in addition to being disposed on the half-shaft 1 , the limiting portion 111 may also be disposed on the first connecting disk 3 , and the present application does not impose any limitation on this.

[0052] In actual configuration, the specific structure of the anti-slip structure 9 is not limited, as long as it can limit the rotation of the first connecting bolt 4 relative to the first mounting hole 31 .

[0053] In an embodiment provided in the present application, the anti-skid structure 9 includes an anti-skid protrusion, and at least one of the outer side wall of the rod portion 42 and the inner side wall of the first mounting hole 31 is provided with an anti-skid protrusion, and the first connecting bolt 4 and the first mounting hole 31 cooperate with each other through the anti-skid protrusion to limit the rotation of the first connecting bolt 4. In this way, the anti-skid protrusion can be used to increase the friction between the first connecting bolt 4 and the first mounting hole 31, thereby improving the limiting effect of the friction between the two on the rotation of the first connecting bolt 4, and improving the reliability of the half-shaft assembly.

[0054] It is not difficult to understand that the anti-slip protrusion can be set on the outer wall of the rod portion 42, the anti-slip protrusion can be set on the inner wall of the first mounting hole 31, or the anti-slip protrusion can be set on the outer wall of the rod portion 42 and the inner wall of the first mounting hole 31 at the same time, and the present application does not impose any restrictions on this.

[0055] In addition, the structure of the anti-slip protrusion is not limited. For example, it can be a straight knurling, a mesh knurling, or other structures protruding from the outer wall of the rod portion 42 or the inner wall of the first mounting hole 31.

[0056] As an alternative, please refer to Figure 4 The outer wall of the rod 42 is provided with an anti-slip protrusion, which is a straight knurling arranged along the axial direction of the rod 42. It is not only easy to process and has a low processing cost, but also can withstand a large torque, further improving the limiting effect on the rotation of the first connecting bolt 4.

[0057] It is worth noting that when the anti-slip protrusion is set on the rod 42, the specific position is set according to the position where the rod 42 matches the first mounting hole 31. Figure 1 and Figure 4 It is understood that when the first connecting bolt 4 is installed on the first connecting plate 3 through the first mounting hole 31, the end face of the head 41 close to the rod 42 generally fits the end face of the first connecting plate 3, so that the anti-slip protrusion can be set on the outer wall of one end of the rod 42 close to the head 41.

[0058] In another embodiment provided by the present application, the anti-slip structure 9 includes a key and a key slot, one of the outer side wall of the rod portion 42 and the inner side wall of the first mounting hole 31 is provided with a key, and the other is provided with a key slot, and the first connecting bolt 4 is connected to the first mounting hole 31 through the key and the key slot to limit the rotation of the first connecting bolt 4. In this way, the first connecting bolt 4 and the first connecting plate 3 are connected by a key, which can not only fix the first connecting bolt 4 circumferentially and improve the rotation limiting effect of the first connecting bolt 4, but also can withstand a large torque and has high stability.

[0059] In actual configuration, the specific structures of the matching portion 411 and the limiting portion 111 are not limited, as long as they can limit the rotation of the first connecting bolt 4 relative to the first mounting hole 31 .

[0060] In an embodiment provided by the present application, the matching portion 411 can be a plane, and the outer side wall of the half shaft 1 or the end face of the first connecting plate 3 can be provided with a limiting seat 11 along the circumferential direction, and the limiting portion 111 is a matching surface on the limiting seat 11 that matches with the matching portion 411, and the matching surface can be the outer side wall of the limiting seat 11. In this way, a part of the head 41 can be cut off along the axial direction of the head 41 to form the matching portion 411, which is easy to process, and the matching portion 411 cooperates with the limiting portion 111 to enhance the limiting effect on the rotation of the first connecting bolt 4. Among them, the limiting seat 11 can be cylindrical, and the limiting portion 111 is the cylindrical surface of the limiting seat 11, which is tightly matched with the plane of the matching portion 411 to limit the rotation of the first connecting bolt 4. Of course, the limiting seat 11 can also be prismatic, and the limiting portion 111 is the plane side surface of the limiting seat 11, which is tightly matched with the plane of the matching portion 411 to limit the rotation of the first connecting bolt 4.

[0061] In another embodiment provided in the present application, the mating portion 411 can be a concave curved surface, that is, a curved surface formed by being concave toward the axis side relative to the outer wall of the head 41. The outer wall of the half-shaft 1 or the end face of the first connecting plate 3 can be provided with a limit seat 11 along the circumferential direction. The limit seat 11 can be cylindrical, and the limit portion 111 can be a cylindrical surface of the limit seat 11, which is matched with the mating portion 411, and the two are pressed against each other to enhance the limiting effect of the rotation of the first connecting bolt 4.

[0062] In another embodiment provided in the present application, the mating portion 411 can also be an outwardly convex curved surface, that is, a curved surface convexly formed by the outer wall of the head 41 to the side away from the axis. The outer wall of the half-shaft 1 or the end face of the first connecting plate 3 can be provided with a limit seat 11 along the circumferential direction, and the outer wall of the limit seat 11 can be recessed toward the axis to form an inwardly concave curved surface. The limit portion 111 is the inwardly concave curved surface, which is matched with the mating portion 411, and the two are pressed against each other to enhance the effect of limiting the rotation of the first connecting bolt 4.

[0063] It is not difficult to understand that the limiting seat 11 can be one and disc-shaped as described in the above embodiment, or it can be several and block-shaped. At this time, each limiting seat 11 corresponds to the first connecting bolt 4 one by one, and the present application does not impose any restrictions on this.

[0064] In addition, the matching portion 411 can also be a recessed hole opened on the outer wall of the head 41, and the limiting portion 111 can be a protrusion arranged circumferentially on the limiting seat 11. The protrusion is adapted to the recessed hole, and the protrusion is inserted into the corresponding recessed hole to limit the rotation of the first connecting bolt 4. Of course, the matching portion 411 can also be a protrusion, and the limiting portion 111 can also be a recessed hole accordingly, and the details will not be repeated.

[0065] Please combine Figure 2 and Figure 3 It is understood that in the embodiment provided in the present application, the tail of the half shaft 1 includes a first shaft section 13 and a second shaft section 14, the second shaft section 14 is located between the first shaft section 13 and the first connecting plate 3, the outer diameter of the first shaft section 13 is smaller than the outer diameter of the second shaft section 14, the first shaft section 13 forms a mounting position for a wheel cover (not shown in the figure), the second shaft section 14 forms a mounting position for a brake drum (not shown in the figure) of a brake (not shown in the figure), and the first connecting bolt 4 passes through the first mounting hole 31 from the right side to the left side of the first connecting plate 3, and is used to connect the wheel cover and the brake drum. Such a configuration can achieve accurate positioning of the wheel cover and the brake drum, improve installation accuracy, and has a compact structure, which is conducive to improving the reliability of the half shaft assembly.

[0066] In addition, please refer to Figure 2 and Figure 3 The head end of the half shaft 1 can also be provided with a spline 15 on the outer side wall for installing the half shaft gear. The torque of the reducer assembly is transmitted to the wheel through the half shaft gear and the half shaft 1 in turn.

[0067] Please continue to refer to Figure 5 , Figure 5 for Figure 1 Partial schematic diagram of the middle half shaft assembly.

[0068] In the embodiment provided in the present application, the half-shaft assembly further includes a half-shaft bearing 2 and a stopper; the half-shaft bearing 2 is sleeved on the half-shaft 1, the stopper is arranged on the half-shaft 1, the stopper abuts against the head end face of the half-shaft bearing 2, and is used to limit the movement of the half-shaft 1 relative to the half-shaft bearing 2 axially toward the wheel side. In this arrangement, the half-shaft 1 can be axially limited at the half-shaft bearing 2 by the stopper, thereby limiting the movement of the half-shaft 1 axially toward the wheel side, further improving the reliability of the half-shaft assembly, so that the half-shaft 1 is not easy to fall off from the wheel during the driving of the car.

[0069] In actual setting, the structure of the limiting member is not limited, as long as it can limit the axial movement of the half shaft 1.

[0070] As an optional solution, the limiting member includes a fastening sleeve 5; the fastening sleeve 5 is interference fit with the half shaft 1, and the rear end face of the fastening sleeve 5 is pressed against the front end face of the half shaft bearing 2. In this way, the fastening sleeve 5 can hold the half shaft 1 tightly by the fastening force generated by the interference fit with the half shaft 1, and the half shaft bearing 2 can limit the movement of the fastening sleeve 5 toward the wheel side, thereby limiting the movement of the half shaft 1 toward the wheel side, and improving the reliability of the half shaft assembly.

[0071] As another optional solution, the limiting member includes a retaining ring 6; the outer wall of the half shaft 1 is provided with a mounting groove 12 adapted to the retaining ring 6 along the circumferential direction, a portion of the retaining ring 6 is located in the mounting groove 12, and the rear end face of the retaining ring 6 is pressed against the front end face of the half shaft bearing 2. With such a configuration, the axial relative position of the retaining ring 6 and the half shaft 1 is relatively stable, and in cooperation with the half shaft bearing 2, a more stable and reliable axial limiting of the half shaft 1 can be achieved, thereby improving the reliability of the half shaft assembly.

[0072] As an alternative, please refer to Figure 1 and Figure 5 The limiting member includes a fastening sleeve 5 and a retaining ring 6; the fastening sleeve 5 is interference fit with the half shaft 1, and the outer wall of the half shaft 1 is provided with a mounting groove 12 adapted to the retaining ring 6 along the circumferential direction, and part of the retaining ring 6 is located in the mounting groove 12, and the tail end face of the fastening sleeve 5 is pressed against the head end face of the half shaft bearing 2, and the tail end face of the retaining ring 6 is pressed against the head end face of the fastening sleeve 5. In this way, the fastening sleeve 5 and the retaining ring 6 can be used to realize the double axial movement restriction of the half shaft 1, which can not only enhance the limiting effect of the axial movement of the half shaft 1, but also when any one of the two fails, the other can be used to continue to limit the position, for example, if the fastening force generated by the interference fit between the fastening sleeve 5 and the half shaft 1 fails first, the retaining ring 6 can continue to press the half shaft bearing 2 through the fastening sleeve 5 to limit the axial movement of the half shaft 1, and the movement restriction time is long, and it can also be combined with regular maintenance, and the corresponding components can be replaced in time when one of the fastening sleeve 5 and the retaining ring 6 fails, thereby greatly improving the reliability of the half shaft assembly.

[0073] Please continue to refer to Figure 6 , Figure 6 for Figure 1 Schematic diagram of the structure of the middle fastening sleeve.

[0074] In the examples provided in this application, please refer to Figure 1 , Figure 5 and Figure 6 The half-axle assembly also includes a gear ring 8; the gear ring 8 is sleeved on the fastening sleeve 5, and the outer wall of the fastening sleeve 5 also forms the installation position of the half-axle oil seal assembly (not shown in the figure). Specifically, the outer peripheral wall of the fastening sleeve 5 can be set from the tail end to the head end as the third shaft section 51, the fourth shaft section 52, and the fifth shaft section 53 with decreasing diameters, and the gear ring 8 is sleeved on the fourth shaft section 52, and the gear ring 8 is positioned by using the third shaft section 51, and the installation position of the half-axle oil seal assembly is formed in the fifth shaft section 53. The gear ring 8 is used to cooperate with the wheel speed sensor (not shown in the figure) to transmit wheel speed information. In this way, not only can the gear ring 8 be used to transmit wheel speed information to the wheel speed sensor, but also the gear ring 8 is set on the fourth shaft section 52, and the fifth shaft section 53 is used to install the half-axle oil seal assembly, which can make the structure of the half-axle assembly more compact, and can also improve the positioning accuracy of the half-axle oil seal assembly during installation, and improve the reliability of the half-axle assembly.

[0075] Please continue to refer to Figure 7 , Figure 7 for Figure 1 Schematic diagram of the structure of the middle half shaft bearing.

[0076] In the examples provided in this application, please refer to Figure 1 , Figure 5 and Figure 7 The half-shaft assembly also includes a half-shaft bearing 2 and a plurality of second connecting bolts 7; a second connecting plate 22 is circumferentially provided on the outer side wall of the half-shaft bearing 2, and a plurality of second mounting holes 221 corresponding to the second connecting bolts 7 are opened in the second connecting plate 22; a mounting seat 23 is circumferentially provided on the outer side wall of the half-shaft bearing 2, and the mounting seat 23 is located on the side of the second connecting plate 22 away from the wheel, and the mounting seat 23 forms a mounting position for a brake base plate (not shown in the figure) and a bridge housing (not shown in the figure), and the second connecting bolts 7 are used to connect the brake base plate and the bridge housing.

[0077] With such arrangement, the mounting seat 23 can be used to improve the positioning accuracy of the brake base plate and the bridge housing on the half-shaft assembly, and the second connecting plate 22 and the second connecting bolt 7 can be used to achieve stable installation of the brake base plate and the bridge housing. Not only is the installation accuracy high, but the second connecting plate 22 and the mounting seat 23 are both arranged on the outer wall of the half-shaft bearing 2, and the structure is more compact, which is beneficial to improving the reliability of the half-shaft assembly.

[0078] In the specific configuration, the shape of the second connecting disk 22 is not limited, for example, it can be circular or asymmetrical, and the present application does not impose any limitation on this.

[0079] As an alternative, please refer to Figure 7 The second connection disk 22 is asymmetrical in shape, and the outer wall of the second connection disk 22 is partially concave to form at least one recessed portion 222, which is used to provide at least a partial installation space for the brake cylinder (not shown in the figure). The recessed portion 222 can be a groove formed by the outer wall of the second connection disk 22 being recessed radially toward one side of the axis, and the groove axially penetrates the second connection disk 22. In this way, the second connection disk 22 occupies less space and can effectively avoid the cylinder on the brake, making the structure more compact and improving the reliability of the half-axle assembly.

[0080] It can be understood that the specific number and opening position of the recessed portion 222 are set according to the installation space and the layout requirements of the brake cylinder, and the present application does not limit this; the number of the second mounting holes 221 and the second connecting bolts 7 on the second connecting plate 22 is not limited, for example, it can be as follows Figure 7 The four shown make the connection between the brake base plate and the bridge housing more stable.

[0081] In actual configuration, the specific structure of the half-shaft bearing 2 is not limited. For example, please refer to Figure 5 and Figure 7 The half-shaft bearing 2 is a double-row tapered roller bearing. Specifically, the half-shaft bearing 2 includes an outer ring 21, two inner rings 24 and two rows of tapered rollers 25. The fastening sleeve 5 is interference-fitted with the half-shaft 1 through the inner hole 55, and the first end face of the inner ring 24 far away from the wheel is pressed against the pressing surface 54. Both ends of the half-shaft bearing 2 are provided with sealing rings 26, which are sleeved on the corresponding inner ring 24, and the outer wall of the sealing ring 26 is pressed against the inner wall of the outer ring 21. In this way, the inner ring 24 can be pressed with a small interference fit with the half-shaft 1 to bear the load transmitted to the half-shaft 1 by the wheel; the half-shaft bearing 2 is a double-row tapered roller bearing, which can bear large radial loads and axial loads at the same time; the setting of the two sealing rings 26 can prevent the bearing grease from flowing out, and can also prevent external muddy water from entering the inside of the half-shaft bearing 2, so as to ensure the reliability of the half-shaft bearing 2. The half-shaft bearing 2 of this structure only needs to be filled with grease and the clearance adjusted during production, and the grease does not need to be replaced during the life cycle, which simplifies the assembly process of the half-shaft assembly, further improves the reliability of the half-shaft assembly, and reduces maintenance costs.

[0082] The following is a description of the assembly process of the half-shaft assembly provided in the embodiment of the present application in conjunction with the accompanying drawings:

[0083] First, press the first connecting bolt 4 onto the first connecting plate 3, and press the second connecting bolt 7 onto the second connecting plate 22; then, press the gear ring 8 onto the fastening sleeve 5; then press the half-shaft bearing 2 and the fastening sleeve 5 onto the half-shaft 1 respectively; finally, install the retaining ring 6 onto the half-shaft 1.

[0084] An embodiment of the present application also provides an automobile, including the above-mentioned half-axle assembly. The specific structure of the half-axle assembly refers to the above-mentioned embodiment. Since the half-axle assembly adopts all the technical solutions of all the above-mentioned embodiments, the automobile at least has all the beneficial effects brought by all the technical solutions of all the above-mentioned embodiments, which will not be repeated here one by one.

[0085] The principles and implementation methods of the present application are described in this article using specific examples. The description of the above embodiments is only used to help understand the device and its core idea of ​​the present application. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present application, several improvements and modifications can be made to the present application, and these improvements and modifications also fall within the scope of protection of the claims of the present application.

Claims

1. A half-axle assembly, used to connect the half-axle gear and the wheel, characterized in that: The half-shaft assembly comprises a half-shaft (1), a first connecting plate (3) and a plurality of first connecting bolts (4); The first connection plate (3) is arranged along the circumference of the half shaft (1), and the first connection plate (3) is provided with a plurality of first mounting holes (31) corresponding to the first connection bolts (4) one by one, and the first connection bolt (4) comprises a head (41) and a rod (42), and the rod (42) passes through the first mounting hole (31); The rod portion (42) and the first mounting hole (31) are restricted in relative rotation by an anti-slip structure (9), and / or the half shaft (1) or the first connecting plate (3) is provided with a limiting portion (111), and the head portion (41) is provided with a matching portion (411), and the matching portion (411) is in contact with the limiting portion (111) for restricting the first connecting bolt (4) from rotating relative to the first mounting hole (31).

2. The half-shaft assembly according to claim 1, characterized in that: The anti-slip structure (9) comprises an anti-slip protrusion, and at least one of the outer side wall of the rod portion (42) and the inner side wall of the first mounting hole (31) is provided with the anti-slip protrusion; Alternatively, the anti-slip structure (9) comprises a key and a key slot, and one of the outer side wall of the rod portion (42) and the inner side wall of the first mounting hole (31) is provided with the key, and the other is provided with the key slot.

3. The half-shaft assembly according to claim 2, characterized in that: The anti-slip protrusion is a straight knurling.

4. The half-shaft assembly according to any one of claims 1 to 3, characterized in that: The matching portion (411) is a plane or an inwardly concave curved surface or an outwardly convex curved surface; a limiting seat (11) is circumferentially arranged on the outer side wall of the semi-shaft (1) or the end face of the first connecting disk (3); and the limiting portion (111) is a matching surface on the limiting seat (11) that matches the matching portion (411).

5. The half-shaft assembly according to any one of claims 1 to 3, characterized in that: The rear portion of the half shaft (1) axially comprises a first shaft section (13) and a second shaft section (14); the second shaft section (14) is located between the first shaft section (13) and the first connecting plate (3); the outer diameter of the first shaft section (13) is smaller than the outer diameter of the second shaft section (14); the first shaft section (13) forms a mounting position for a wheel decorative cover; the second shaft section (14) forms a mounting position for a brake drum; and the first connecting bolt (4) is used to connect the wheel decorative cover and the brake drum.

6. The half-shaft assembly according to any one of claims 1 to 3, characterized in that: The half-shaft assembly also includes a half-shaft bearing (2) and a stopper; The half-shaft bearing (2) is sleeved on the half-shaft (1), the limiting member is arranged on the half-shaft (1), the limiting member abuts against the front end surface of the half-shaft bearing (2), and is used to limit the half-shaft (1) from moving axially toward one side of the wheel relative to the half-shaft bearing (2).

7. The half-shaft assembly according to claim 6, characterized in that: The limiting member comprises a fastening sleeve (5); the fastening sleeve (5) is interference fit with the half shaft (1), and the rear end surface of the fastening sleeve (5) is pressed against the front end surface of the half shaft bearing (2); Alternatively, the limiting member comprises a retaining ring (6); an outer wall of the half shaft (1) is provided with a mounting groove (12) adapted to the retaining ring (6) along the circumferential direction, a portion of the retaining ring (6) is located in the mounting groove (12), and the rear end face of the retaining ring (6) is pressed against the front end face of the half shaft bearing (2); Alternatively, the limiting member comprises a fastening sleeve (5) and a retaining ring (6); the fastening sleeve (5) is interference-fitted with the half-shaft (1); an outer wall of the half-shaft (1) is provided with a mounting groove (12) adapted to the retaining ring (6) along the circumferential direction; a portion of the retaining ring (6) is located in the mounting groove (12); the rear end face of the fastening sleeve (5) is pressed against the front end face of the half-shaft bearing (2); and the rear end face of the retaining ring (6) is pressed against the front end face of the fastening sleeve (5).

8. The half-shaft assembly according to claim 7, characterized in that: The half-shaft assembly also includes a ring gear (8); When the limiting member includes a fastening sleeve (5), the gear ring (8) is sleeved on the fastening sleeve (5), the gear ring (8) is used to cooperate with the wheel speed sensor, and the outer side wall of the fastening sleeve (5) also forms a mounting position for the half-axle oil seal assembly.

9. The half-shaft assembly according to any one of claims 1 to 3, characterized in that: The half-shaft assembly also includes a half-shaft bearing (2) and a plurality of second connecting bolts (7); A second connection plate (22) is provided on the outer side wall of the half-shaft bearing (2) along the circumferential direction, and the second connection plate (22) is provided with a plurality of second mounting holes (221) corresponding one-to-one to the second connection bolts (7); The outer side wall of the half-shaft bearing (2) is provided with a mounting seat (23) along the circumferential direction, and the mounting seat (23) is located on the side of the second connecting plate (22) away from the wheel. The mounting seat (23) forms a mounting position for the brake base plate and the bridge housing. The second connecting bolt (7) is used to connect the brake base plate and the bridge housing, and / or the outer side wall of the second connecting plate (22) is constructed to be partially concave to form at least one recessed portion (222), and the recessed portion (222) forms at least a partial installation space of the brake cylinder.

10. An automobile, characterized in that: A half-shaft assembly comprising any one of claims 1 to 9.

Images