Kingpin structure of steering drive axle and mounting method

Abstract

The invention discloses a steering drive axle master pin structure and an installation method, and relates to the technical field of steering drive axles, the steering drive axle master pin structure comprises an axle housing body, an upper master pin and a lower master pin which are arranged on the axle housing body, and an installation assembly which is arranged on the axle housing body and is used for installing the upper master pin and the lower master pin, the mounting assembly comprises a mounting hole formed in the side wall of the axle housing body, the mounting hole is close to the axle housing main pin hole, and a wedge-shaped piece is arranged in the mounting hole. According to the steering drive axle master pin structure and the mounting method, the upper master pin and the lower master pin are in clearance fit with the axle housing, so that the upper master pin and the lower master pin can be manually and conveniently placed into the master pin hole of the axle housing, and the master pin can be mounted and limited through the wedge-shaped piece and locked and fixed through the nut; therefore, the assembly waiting time is shortened while the installation cost of the master pin is reduced, and the economical efficiency and efficiency of installation of the master pin are improved.

Description

Technical Field

[0001] The invention relates to the technical field of steering drive axles, in particular to a steering drive axle kingpin structure and an installation method. Background Art

[0002] The existing steering drive axle kingpin and bridge housing are assembled by interference fit. Due to the interference, the kingpin is difficult to assemble. In the existing technology, press-fit and frozen kingpins are usually used for assembly. When the kingpin is pressed by press, as the load of the steering drive axle increases, the interference between the kingpin and the bridge housing increases accordingly, the required pressing force increases, and the cost of the press rises sharply. The existing steering drive axle market is too small, and companies basically produce in small batches. In addition, the press is expensive and basically dedicated, making it difficult for companies to afford it. Liquid nitrogen cooling is used, and liquid nitrogen is a substance that is easily extracted from nature and has a low cost. Most domestic companies use this method to press the kingpin, but the cooling time is long. When the interference fit is large, the kingpin even needs to be cooled for more than 1 hour, which seriously affects the production rhythm and cannot cope with large-scale, assembly line operations. For this reason, we propose a steering drive axle kingpin structure and installation method. Summary of the invention

[0003] The object of the present invention is to provide a steering drive axle kingpin structure and an installation method to solve the problems raised in the above background technology.

[0004] To achieve the above object, the present invention provides the following technical solution: a steering drive axle kingpin structure, comprising an axle housing body and an upper kingpin and a lower kingpin arranged on the axle housing body, and also comprising an installation assembly arranged on the axle housing body for installing the upper kingpin and the lower kingpin;

[0005] The mounting assembly includes a mounting hole opened on the side wall of the bridge housing body, the mounting hole is arranged close to the main pin hole of the bridge housing, a wedge is arranged in the mounting hole, the wedge includes a mounting pin and an inclined surface opened on one side of the mounting pin, one end of the mounting pin is fixedly connected to a connecting plate arranged in a regular hexagonal shape, a rubber gasket is arranged on the side wall of one end of the mounting pin close to the connecting plate, the mounting pin is provided with a fixing assembly for fixing it, and the bridge housing body is provided with a sealing assembly for sealing the mounting pin.

[0006] Preferably, the fixing assembly comprises a threaded strip opened on a side wall of the mounting pin, and the threaded strip is threadedly connected with a nut.

[0007] Preferably, the sealing assembly includes a sealing ring fixedly connected to the side of the bridge housing body away from the connecting plate, the sealing ring is concentrically arranged with the mounting hole, the inner wall of the sealing ring is provided with an annular sealing groove, the annular sealing groove is provided with a rubber airbag, the sealing ring is provided with a driving assembly for driving the rubber airbag and a locking assembly for auxiliary locking of the mounting pin, and the sealing ring is provided with a marking assembly for marking the mounting pin after it is fixed.

[0008] Preferably, the driving assembly includes a driving cavity opened in the sealing ring, the driving cavity is slidably connected with an annular driving ring, a plurality of driving tubes are fixedly connected with the inner wall of the driving cavity, each of the driving tubes is communicated with a rubber airbag, a side of the sealing ring away from the bridge housing body is slidably connected with a sliding ring, one end of the sliding ring is connected to the driving ring, and the driving cavity is provided with a telescopic assembly for telescoping the driving ring.

[0009] Preferably, the telescopic assembly includes a plurality of telescopic tubes fixedly connected to the inner wall of the driving chamber away from the sliding ring, each of the telescopic tubes is slidably connected to a telescopic rod, one end of each of the telescopic rods is connected to the driving ring, and a first spring is sleeved on the side wall of each of the telescopic tubes, and both ends of each of the first springs are respectively connected to the inner wall of the driving chamber and the driving ring.

[0010] Preferably, the marking assembly includes a plurality of fixing holes arranged in a circular array on the side wall of the sealing ring, each of the fixing holes is connected to a marking plate via a guide assembly, a marking groove is provided on the side wall of each marking plate, a plurality of rotating plates are hinged on one side of the driving ring close to the marking plate, the other end of each rotating plate is hinged to the marking plate, a telescopic sealing sleeve is provided on the side wall of each marking plate located inside the driving cavity, and one end of each telescopic sealing sleeve is connected to the inner wall of the driving cavity.

[0011] Preferably, the guide assembly comprises a guide groove formed on a side wall of the marking plate, the guide groove is slidably connected with a guide plate, and one end of the guide plate is connected to an inner wall of the fixing hole.

[0012] Preferably, the locking assembly includes a plurality of locking holes opened on a side of the sealing ring close to the mounting pin, each of the locking holes is slidably connected to a square plate, each of the square plates is fixedly connected to a locking rod, each of the locking rods is provided with a rubber pad at one end close to the mounting pin, each of the square plate side walls is sleeved with a second spring, each of the two ends of the second spring is respectively connected to the square plate and the inner wall of the locking hole, and the sealing ring is provided with a pushing assembly for pushing each locking rod.

[0013] Preferably, the pushing assembly includes a pushing hole opened on the side of the sealing ring close to the nut, the pushing hole is slidably connected to a pushing plate, one end of the locking rod is located in the pushing hole and has a rounded corner, the bottom wall of the pushing hole is fixedly connected to a third spring, and the other end of the third spring is connected to the pushing plate.

[0014] The method for installing the kingpin of the steering drive axle includes the following steps:

[0015] S1. When installing the upper kingpin and the lower kingpin on the axle housing body, first manually place the upper kingpin into the kingpin hole of the axle housing. The upper kingpin and the lower kingpin are installed in the same principle. The installation of the upper kingpin is described here. Then, insert the upper kingpin into the kingpin hole of the axle housing and align the inclined surface on the installation pin with the upper kingpin.

[0016] S2. When one end of the mounting pin is passed through the mounting hole, the mounting pin can be fixed by using the fixing assembly, and the nut is screwed into the side wall of the mounting pin, and the mounting pin is fixed under the action of the threaded engagement transmission. In the process of fixing the mounting pin, the inclined surface of the side wall of the mounting pin will be pushed against the side wall of the upper kingpin, and the upper kingpin is restricted in radial and axial directions under the action of the tightening and limiting action of the inclined surface;

[0017] S3. During the process of screwing the nut into the side wall of the mounting pin, the sealing of the mounting pin is achieved by the cooperation of the drive assembly and the sealing assembly;

[0018] S4. At the same time, during the process of screwing the nut in, the marking component is used to mark whether the nut is locked in place, so that the subsequent process can intuitively see the locking and fixing status of the installation pin;

[0019] S5. At the same time, in the process of the nut moving close to the sealing ring, the cooperation of the locking assembly and the pushing assembly provides an auxiliary locking effect for the fixation of the mounting pin.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. The kingpin structure and installation method of the steering drive axle of the present invention, through the clearance fit between the upper kingpin and the lower kingpin and the bridge housing, allows the upper kingpin and the lower kingpin to be placed in the kingpin hole of the bridge housing more conveniently by manual labor, and the installation limit of the wedge-shaped piece and the locking fixation of the nut are utilized, thereby achieving convenient installation and firm fixation of the upper kingpin and the lower kingpin, and avoiding the use of a press or cooling waiting of the kingpin by eliminating the interference fit, thereby reducing the installation cost of the kingpin and the assembly waiting time, thereby improving the economy and efficiency of the kingpin installation.

[0022] 2. The steering drive axle kingpin structure and installation method of the present invention, through the setting of the sealing component, is used to seal the installation pin under the driving action of the driving component, thereby reducing the decline in sealing performance caused by the lack of the inclined surface of the side wall of the installation pin.

[0023] 3. The steering drive axle kingpin structure and installation method of the present invention, through the setting of the marking component, facilitates the subsequent process to intuitively see the locking and fixing status of the installation pin, thereby reducing the risk of missing locking or inadequate locking of the installation pin, and further improving the installation and fixing reliability of the upper kingpin and the lower kingpin.

[0024] 4. The steering drive axle kingpin structure and installation method of the present invention, through the setting of the locking assembly, provides an auxiliary locking effect for the fixation of the mounting pin under the pushing action of the pushing assembly, reduces the risk of the nut loosening due to the lack of the inclined surface of the side wall of the mounting pin, thereby improving the fixing stability of the mounting pin. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0026] Figure 2 It is a partial cross-sectional structural schematic diagram of the upper kingpin and the lower kingpin after installation of the present invention;

[0027] Figure 3 It is a partial sectional front view of the upper kingpin and the lower kingpin of the present invention after installation;

[0028] Figure 4 It is a schematic diagram of the position structure of the installation component, the sealing component and the fixing component of the present invention;

[0029] Figure 5 This is a schematic diagram of the mounting hole structure of the present invention;

[0030] Figure 6 This is a schematic diagram of the structure of the installation component and the fixing component of the present invention;

[0031] Figure 7 It is a schematic diagram of the internal structure of the sealing component and the marking component of the present invention;

[0032] Figure 8 for Figure 7 Enlarged view of point A in the middle;

[0033] Fig. 9 for Figure 8 Enlarged view of point B in the middle;

[0034] Fig.10 It is a partial cross-sectional side view of the marking assembly of the present invention.

[0035] In the figure: 101, bridge housing body; 102, upper kingpin; 103, lower kingpin; 201, mounting hole; 202, mounting pin; 203, inclined plane; 204, connecting plate; 205, rubber gasket; 301, threaded strip; 302, nut; 401, sealing ring; 402, annular sealing groove; 403, rubber airbag; 501, sliding ring; 502, driving ring; 503, driving pipe; 504, driving chamber; 601, extension Retractable tube; 602, telescopic rod; 603, first spring; 701, fixing hole; 702, marking plate; 703, marking groove; 704, rotating plate; 705, telescopic sealing sleeve; 801, guide groove; 802, guide plate; 901, locking hole; 902, square plate; 903, locking rod; 904, second spring; 1001, pushing hole; 1002, pushing plate; 1003, rounded corner; 1004, third spring. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] Example 1

[0038] See also Figure 1-Figure 10 The steering drive axle kingpin structure shown in the figure includes an axle housing body 101 and an upper kingpin 102 and a lower kingpin 103 arranged on the axle housing body 101, and also includes an installation component arranged on the axle housing body 101 for installing the upper kingpin 102 and the lower kingpin 103;

[0039] The mounting assembly includes a mounting hole 201 opened on the side wall of the bridge housing body 101, the mounting hole 201 is arranged near the main pin hole of the bridge housing, a wedge is arranged in the mounting hole 201, the wedge includes a mounting pin 202 and an inclined surface 203 opened on one side of the mounting pin 202, one end of the mounting pin 202 is fixedly connected to a connecting plate 204 arranged in a regular hexagonal shape, a rubber gasket 205 is arranged on the side wall of one end of the mounting pin 202 close to the connecting plate 204, the mounting pin 202 is provided with a fixing assembly for fixing it, and the bridge housing body 101 is provided with a sealing assembly for sealing the mounting pin 202;

[0040] It should be noted here that: through the setting of the installation component, by utilizing the clearance fit between the upper kingpin 102 and the lower kingpin 103 and the bridge housing, the upper kingpin 102 and the lower kingpin 103 can be easily placed in the kingpin hole of the bridge housing by hand, and the installation limit of the wedge-shaped piece and the locking fixation of the nut 302 are utilized, thereby achieving convenient installation and secure fixation of the upper kingpin 102 and the lower kingpin 103, while eliminating the interference fit and avoiding the use of a press or waiting for the kingpin to cool down, thereby reducing the installation cost of the kingpin and the assembly waiting time, thereby improving the economy and efficiency of the kingpin installation.

[0041] See also Figure 6 and Figure 7 , the fixing assembly shown in the figure includes a threaded strip 301 opened on the side wall of the mounting pin 202, and the threaded strip 301 is threadedly connected with a nut 302;

[0042] It should be noted here that: the setting of the fixing component is used to provide fixed locking for the mounting pin 202.

[0043] See also Figure 7 and Figure 8 The sealing assembly shown in the figure includes a sealing ring 401 fixedly connected to the side of the bridge housing body 101 away from the connecting plate 204, the sealing ring 401 is concentrically arranged with the mounting hole 201, an annular sealing groove 402 is provided on the inner wall of the sealing ring 401, a rubber airbag 403 is provided in the annular sealing groove 402, the sealing ring 401 is provided with a driving assembly for driving the rubber airbag 403 and a locking assembly for auxiliary locking of the mounting pin 202, and the sealing ring 401 is provided with a marking assembly for marking the mounting pin 202 after it is fixed;

[0044] It should be noted here that: through the provision of the sealing component, under the driving action of the driving component, the mounting pin 202 is sealed, thereby reducing the degradation of the sealing performance caused by the absence of the side wall inclined surface 203 of the mounting pin 202.

[0045] See also Figure 7 and Figure 8 The driving assembly shown in the figure includes a driving cavity 504 opened in the sealing ring 401, the driving cavity 504 is slidably connected to the annular driving ring 502, a plurality of driving tubes 503 are fixedly connected to the inner wall of the driving cavity 504, each driving tube 503 is connected to the rubber airbag 403, a sliding ring 501 is slidably connected to the side of the sealing ring 401 away from the bridge housing body 101, one end of the sliding ring 501 is connected to the driving ring 502, and the driving cavity 504 is provided with a telescopic assembly for telescoping the driving ring 502;

[0046] It should be noted here that: through the arrangement of the driving assembly, it is convenient to squeeze and push the gas in the driving chamber 504 into the rubber airbag 403 .

[0047] See also Figure 7 and Figure 8 The telescopic assembly shown in the figure includes a plurality of telescopic tubes 601 fixedly connected to the inner wall of the driving cavity 504 away from the sliding ring 501, each telescopic tube 601 is slidably connected to a telescopic rod 602, one end of each telescopic rod 602 is connected to the driving ring 502, and a first spring 603 is sleeved on the side wall of each telescopic tube 601, and the two ends of each first spring 603 are respectively connected to the inner wall of the driving cavity 504 and the driving ring 502;

[0048] It should be noted here that: the setting of the telescopic component provides guidance and reset functions for the movement of the drive ring 502.

[0049] See also Figure 8 and Fig.10 The marking assembly shown in the figure includes a plurality of fixing holes 701 arranged in a circular array on the side wall of the sealing ring 401, each fixing hole 701 is connected to a marking plate 702 through a guide assembly, and a marking groove 703 is provided on the side wall of each marking plate 702. A plurality of rotating plates 704 are hingedly connected to one side of the driving ring 502 close to the marking plate 702, and the other end of each rotating plate 704 is hingedly connected to the marking plate 702. A telescopic sealing sleeve 705 is provided on the side wall of each marking plate 702 located inside the driving cavity 504, and one end of each telescopic sealing sleeve 705 is connected to the inner wall of the driving cavity 504;

[0050] It should be noted here that: by setting the marking component, the subsequent process can intuitively see the locking and fixing status of the installation pin 202, thereby reducing the risk of missing locking or inadequate locking of the installation pin 202, and further improving the installation and fixing reliability of the upper main pin 102 and the lower main pin 103.

[0051] See also Figure 8 and Fig.10 , the guide assembly shown in the figure includes a guide groove 801 opened on the side wall of the marking plate 702, the guide groove 801 is slidably connected with a guide plate 802, and one end of the guide plate 802 is connected to the inner wall of the fixing hole 701;

[0052] It should be noted here that: by setting the guide component, a guiding and limiting function is provided for the movement of the marking plate 702.

[0053] See also Figure 8 and Fig. 9The locking assembly shown in the figure includes a plurality of locking holes 901 opened on the side of the sealing ring 401 close to the mounting pin 202, each locking hole 901 is slidably connected to a square plate 902, each square plate 902 is fixedly connected to a locking rod 903, each locking rod 903 is provided with a rubber pad at one end close to the mounting pin 202, each square plate 902 side wall is sleeved with a second spring 904, each second spring 904 is respectively connected to the square plate 902 and the inner wall of the locking hole 901, and the sealing ring 401 is provided with a pushing assembly for pushing each locking rod 903;

[0054] It should be noted here that: through the setting of the locking assembly, an auxiliary locking effect is provided for the fixation of the mounting pin 202, reducing the risk of loosening of the nut 302 due to the absence of the side wall inclined surface 203 of the mounting pin 202, thereby improving the fixing stability of the mounting pin 202.

[0055] See also Figure 8 and Fig. 9 The pushing assembly shown in the figure includes a pushing hole 1001 opened on the side of the sealing ring 401 close to the nut 302, the pushing hole 1001 is slidably connected to a pushing plate 1002, one end of the locking rod 903 is located in the pushing hole 1001 and has a rounded corner 1003, a third spring 1004 is fixedly connected to the bottom wall of the pushing hole 1001, and the other end of the third spring 1004 is connected to the pushing plate 1002;

[0056] It should be noted here that: by setting the pushing assembly, it is convenient to push each locking rod 903 to move close to the installation pin 202, so that one end of several of the locking rods 903 abuts against the threaded strip 301 on the side wall of the installation pin 202.

[0057] The method for installing the kingpin of the steering drive axle includes the following steps:

[0058] S1. When installing the upper kingpin 102 and the lower kingpin 103 on the axle housing body 101, first manually put the upper kingpin 102 (the installation principle of the upper kingpin 102 and the lower kingpin 103 is the same, and the installation of the upper kingpin 102 is described here) into the kingpin hole of the axle housing, and then insert the upper kingpin 102 into the kingpin hole of the axle housing, and align the inclined surface 203 on the installation pin 202 with the upper kingpin 102;

[0059] S2. When one end of the mounting pin 202 is passed through the mounting hole 201, the mounting pin 202 can be fixed by using the fixing assembly, and the nut 302 is screwed into the side wall of the mounting pin 202, and then the mounting pin 202 is fixed under the action of the threaded engagement transmission, and in the process of fixing the mounting pin 202, the inclined surface 203 of the side wall of the mounting pin 202 will be pushed against the side wall of the upper main pin 102, and then the upper main pin 102 is restricted in radial and axial directions under the action of the tightening and limiting action of the inclined surface 203;

[0060] S3. During the process of screwing the nut 302 into the side wall of the mounting pin 202, the sealing of the mounting pin 202 is achieved by using the cooperation of the drive assembly and the sealing assembly;

[0061] S4. At the same time, during the screwing process of the nut 302, the marking component is used to mark whether the nut 302 is locked in place, so that the subsequent process can intuitively see the locking and fixing of the mounting pin 202;

[0062] S5. At the same time, when the nut 302 moves closer to the sealing ring 401, the locking assembly and the pushing assembly cooperate to provide an auxiliary locking effect for the fixation of the mounting pin 202.

[0063] Working principle: When installing the upper kingpin 102 and the lower kingpin 103 on the bridge housing body 101, firstly manually put the upper kingpin 102 (the installation principle of the upper kingpin 102 and the lower kingpin 103 is the same, and the installation of the upper kingpin 102 is described here) into the kingpin hole of the bridge housing, and because the upper kingpin 102 and the kingpin hole of the bridge housing are clearance-matched, the upper kingpin 102 can be inserted into the kingpin hole of the bridge housing more conveniently. After the upper kingpin 102 is inserted into the kingpin hole of the bridge housing, the installation pin 202 is inserted from one end of the installation hole 201 on the side wall of the bridge housing body 101. During the process of inserting the installation pin 202 from the installation hole 201, the inclined surface 203 on the installation pin 202 is aligned with the upper kingpin 102;

[0064] As the mounting pin 202 is continuously inserted, when one end of the mounting pin 202 passes through the mounting hole 201, the nut 302 can be screwed into the side wall of the mounting pin 202, and then the mounting pin 202 is fixed under the action of the threaded engagement transmission. In the process of fixing the mounting pin 202, the inclined surface 203 of the side wall of the mounting pin 202 will be pushed against the side wall of the upper main pin 102, and then the upper main pin 102 is restricted in radial and axial directions under the action of the tightening and limiting of the inclined surface 203, thereby achieving the upper main pin 102. The installation limit is used, so that the clearance fit between the upper kingpin 102 and the axle housing is used, so that the upper kingpin 102 can be easily placed in the kingpin hole of the axle housing by hand, and the installation limit of the wedge piece and the locking and fixing of the nut 302 are used, so that the upper kingpin 102 is easily installed and firmly fixed, and the use of a press or the cooling waiting time of the kingpin is avoided by eliminating the interference fit, thereby reducing the installation cost of the kingpin and the assembly waiting time, thereby improving the economy and efficiency of the kingpin installation;

[0065] When the nut 302 is screwed into the thread of the side wall of the mounting pin 202, when the nut 302 abuts against the sliding ring 501 on the side wall of the sealing ring 401, the driving ring 502 will be pushed to slide in the driving cavity 504 under the action of the driving force. During the sliding process of the driving ring 502, the gas inside the driving cavity 504 will be squeezed, and then the gas in the driving cavity 504 will be squeezed from the driving tube 503 into the rubber airbag 403, so that the rubber airbag 403 is inflated, and the inflated rubber airbag 403 will abut against the side wall of the mounting pin 202, thereby sealing the mounting pin 202, reducing the reduction in sealing performance caused by the lack of the inclined surface 203 on the side wall of the mounting pin 202.

[0066] At the same time, when the nut 302 pushes the driving ring 502 to move in the driving cavity 504, the rotating plate 704 will be pushed to rotate, thereby pushing the marking plate 702 out of the driving cavity 504. After the nut 302 is tightened in place, the marking groove 703 on the side wall of the marking plate 702 will leak out from the driving cavity 504, so as to mark whether the nut 302 is locked in place, so that the subsequent process can intuitively see the locking and fixing status of the installation pin 202, thereby reducing the risk of missing locking or not locking in place for the installation pin 202, thereby improving the installation and fixing reliability of the upper main pin 102 and the lower main pin 103;

[0067] At the same time, in the process of the nut 302 moving close to the sealing ring 401, when the nut 302 approaches the end face of the sealing ring 401, each push plate 1002 will be squeezed and pushed, thereby causing each push plate 1002 to slide in the push hole 1001. In the process of the sliding of each push plate 1002, when one side of each push plate 1002 abuts against the rounded corner 1003 on each locking rod 903, each locking rod 903 will be pushed to move close to the mounting pin 202, thereby causing one end of several of the locking rods 903 to abut against the threaded strip 301 on the side wall of the mounting pin 202, thereby providing an auxiliary locking effect for the fixation of the mounting pin 202, reducing the risk of loosening of the nut 302 due to the absence of the inclined surface 203 on the side wall of the mounting pin 202, thereby improving the fixing stability of the mounting pin 202.

[0068] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0069] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. The kingpin structure of the steering drive axle includes: A bridge housing body (101) and an upper kingpin (102) and a lower kingpin (103) arranged on the bridge housing body (101); It is characterized by further comprising: An installation component disposed on the axle housing body (101) for installing an upper kingpin (102) and a lower kingpin (103); The mounting assembly comprises a mounting hole (201) provided on a side wall of a bridge housing body (101), the mounting hole (201) being arranged close to a main pin hole of the bridge housing, a wedge-shaped member being arranged in the mounting hole (201), the wedge-shaped member comprising a mounting pin (202) and an inclined surface (203) provided on one side of the mounting pin (202), one end of the mounting pin (202) being fixedly connected to a connecting plate (204) arranged in a regular hexagonal shape, a rubber gasket (205) being arranged on a side wall of one end of the mounting pin (202) close to the connecting plate (204), the mounting pin (202) being provided with a fixing assembly for fixing the mounting pin (202), and the bridge housing body (101) being provided with a sealing assembly for sealing the mounting pin (202).

2. The steering drive axle kingpin structure according to claim 1, characterized in that: The fixing assembly comprises a threaded strip (301) formed on a side wall of the mounting pin (202), and the threaded strip (301) is threadedly connected to a nut (302).

3. The steering drive axle kingpin structure according to claim 2, characterized in that: The sealing assembly comprises a sealing ring (401) fixedly connected to a side of the bridge housing body (101) away from the connecting plate (204); the sealing ring (401) is arranged concentrically with the mounting hole (201); an annular sealing groove (402) is provided on the inner wall of the sealing ring (401); a rubber airbag (403) is provided in the annular sealing groove (402); the sealing ring (401) is provided with a driving assembly for driving the rubber airbag (403) and a locking assembly for auxiliary locking of the mounting pin (202); and the sealing ring (401) is provided with a marking assembly for marking the mounting pin (202) after it is fixed.

4. The steering drive axle kingpin structure according to claim 3, characterized in that: The driving assembly comprises a driving cavity (504) opened in the sealing ring (401), the driving cavity (504) is slidably connected to an annular driving ring (502), a plurality of driving tubes (503) are fixedly connected to the inner wall of the driving cavity (504), each of the driving tubes (503) is arranged in communication with the rubber airbag (403), a sliding ring (501) is slidably connected to the side of the sealing ring (401) away from the bridge housing body (101), one end of the sliding ring (501) is connected to the driving ring (502), and the driving cavity (504) is provided with a telescopic assembly for telescoping the driving ring (502).

5. The steering drive axle kingpin structure according to claim 4, characterized in that: The telescopic assembly comprises a plurality of telescopic tubes (601) fixedly connected to the inner wall of a driving cavity (504) away from a sliding ring (501), each of the telescopic tubes (601) being slidably connected to a telescopic rod (602), one end of each of the telescopic rods (602) being connected to the driving ring (502), a first spring (603) being sleeved on the side wall of each of the telescopic tubes (601), and two ends of each of the first springs (603) being respectively connected to the inner wall of the driving cavity (504) and the driving ring (502).

6. The steering drive axle kingpin structure according to claim 5, characterized in that: The marking component comprises a plurality of fixing holes (701) arranged in a circular array and opened on the side wall of the sealing ring (401); each of the fixing holes (701) is connected to a marking plate (702) via a guide component; each of the marking plates (702) is provided with a marking groove (703) on its side wall; a plurality of rotating plates (704) are hingedly connected on one side of the driving ring (502) close to the marking plate (702); the other end of each of the rotating plates (704) is hingedly connected to the marking plate (702); a telescopic sealing sleeve (705) is sleeved on the side wall of each of the marking plates (702) located inside the driving cavity (504); one end of each of the telescopic sealing sleeves (705) is connected to the inner wall of the driving cavity (504).

7. The steering drive axle kingpin structure according to claim 6, characterized in that: The guide assembly comprises a guide groove (801) formed on the side wall of the marking plate (702), the guide groove (801) being slidably connected to a guide plate (802), and one end of the guide plate (802) being connected to the inner wall of the fixing hole (701).

8. The steering drive axle kingpin structure according to claim 7, characterized in that: The locking assembly comprises a plurality of locking holes (901) opened on a side of the sealing ring (401) close to the mounting pin (202); each of the locking holes (901) is slidably connected to a square plate (902); each of the square plates (902) is fixedly connected to a locking rod (903); a rubber pad is provided at one end of each of the locking rods (903) close to the mounting pin (202); a second spring (904) is sleeved on the side wall of each of the square plates (902); two ends of each of the second springs (904) are respectively connected to the square plate (902) and the inner wall of the locking hole (901); and the sealing ring (401) is provided with a pushing assembly for pushing each of the locking rods (903).

9. The steering drive axle kingpin structure according to claim 8, characterized in that: The pushing assembly comprises a pushing hole (1001) opened on a side of the sealing ring (401) close to the nut (302); the pushing hole (1001) is slidably connected to a pushing plate (1002); one end of the locking rod (903) is located in the pushing hole (1001) and has a rounded corner (1003); a third spring (1004) is fixedly connected to the bottom wall of the pushing hole (1001); the other end of the third spring (1004) is connected to the pushing plate (1002).

10. A method for installing a kingpin of a steering drive axle, which adopts the kingpin structure of a steering drive axle according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1. When installing the upper kingpin (102) and the lower kingpin (103) on the axle housing body (101), first manually place the upper kingpin (102) (the installation principle of the upper kingpin (102) and the lower kingpin (103) is the same, and the installation of the upper kingpin (102) is described here) into the kingpin hole of the axle housing, and then insert the upper kingpin (102) into the kingpin hole of the axle housing, and align the inclined surface (203) on the installation pin (202) with the upper kingpin (102); S2. When one end of the mounting pin (202) is passed through the mounting hole (201), the mounting pin (202) can be fixed by using the fixing assembly, and the nut (302) is screwed into the side wall of the mounting pin (202), thereby achieving the fixing of the mounting pin (202) under the action of the threaded engagement transmission, and in the process of fixing the mounting pin (202), the inclined surface (203) of the side wall of the mounting pin (202) is pushed against the side wall of the upper main pin (102), thereby limiting the radial and axial directions of the upper main pin (102) under the action of the tightening and limiting action of the inclined surface (203); S3. During the process of screwing the nut (302) into the side wall of the mounting pin (202), the sealing of the mounting pin (202) is achieved by the cooperation of the drive assembly and the sealing assembly; S4. At the same time, during the process of screwing the nut (302), the marking component is used to mark whether the nut (302) is locked in place, so that the subsequent process can intuitively see the locking and fixing status of the mounting pin (202); S5. At the same time, when the nut (302) moves closer to the sealing ring (401), the locking assembly and the pushing assembly cooperate to provide an auxiliary locking effect for the fixation of the mounting pin (202).

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