Drive axle steering knuckle structure

Abstract

The utility model discloses a drive axle knuckle structure which comprises a knuckle and an axle housing, a knuckle fork is arranged at one end of the knuckle, an axle housing fork is arranged at one end of the axle housing, the knuckle fork is movably connected with the axle housing fork through a master pin, the master pin comprises an upper master pin and a lower master pin, an upper fork of the knuckle fork is connected with an upper fork of the axle housing fork through the upper master pin, and a lower fork of the knuckle fork is connected with a lower fork of the axle housing fork through the lower master pin. A lower joint fork of the steering joint fork is connected with a lower joint fork of the axle housing joint fork through a lower main pin; each of the upper main pin and the lower main pin comprises a connecting block and a pin shaft which are integrally connected, and the pin shaft of the lower main pin is sleeved with a spherical sleeve; the connecting block is connected with the steering yoke through a bolt, the pin shaft is inserted into the steering yoke and an axle housing yoke hole, and a shaft sleeve matched with the pin shaft is arranged in an upper yoke hole of the axle housing yoke; and a spherical seat matched with the spherical sleeve is arranged in a lower joint fork hole of the axle housing joint fork. The impact resistance of the universal joint is improved, the service life of the universal joint is prolonged, and the risk that an axle breaks down in the using process is reduced.

Description

Technical Field

[0001] The utility model relates to the field of automotive steering axles, specifically to the structure of a drive axle steering knuckle. Background Art

[0002] The steering knuckle is one of the main parts on the automotive steering axle, which can enable the vehicle to drive stably and transmit the driving direction sensitively. The function of the steering knuckle is to bear the load at the front of the vehicle, support and drive the wheels to rotate around the kingpin to make the vehicle turn. When the vehicle is in motion, it bears variable impact loads, and the structure of the steering knuckle directly affects the driving stability and safety of the vehicle. In general conventional designs, the steering knuckle mostly adopts a through-shaft type or an upper and lower double straight-shaft type design. For such designs, the upper and lower two pin bushings are hollow cylinders, and the force directions of the two pin bushings are single, while the impact force situation is complex, which easily leads to increased wear and affects the service life of the universal joint. Summary of the Invention

[0003] The purpose of the utility model is to overcome the deficiencies of the prior art and provide a drive axle steering knuckle structure.

[0004] To achieve the above purpose, the utility model is realized through the following technical solutions:

[0005] The drive axle steering knuckle structure includes a steering knuckle and a axle housing. One end of the steering knuckle is provided with a steering knuckle fork, and one end of the axle housing is provided with an axle housing knuckle fork. The steering knuckle fork and the axle housing knuckle fork are movably connected through a kingpin. The kingpin includes an upper kingpin and a lower kingpin.

[0006] The upper knuckle fork of the steering knuckle fork is connected to the upper knuckle fork of the axle housing knuckle fork through the upper kingpin, and the lower knuckle fork of the steering knuckle fork is connected to the lower knuckle fork of the axle housing knuckle fork through the lower kingpin;

[0007] Both the upper kingpin and the lower kingpin include a connecting block and a pin that are integrally connected. A spherical sleeve is sleeved on the pin of the lower kingpin.

[0008] The connecting block is connected to the steering knuckle fork through bolts. The pin is inserted into the holes of the steering knuckle fork and the axle housing knuckle fork. A bushing that cooperates with the pin is provided in the upper knuckle fork hole of the axle housing knuckle fork; a spherical seat that cooperates with the spherical sleeve is provided in the lower knuckle fork hole of the axle housing knuckle fork.

[0009] Further, a sealing ring that cooperates with the axle housing knuckle fork for sealing is provided on the pin.

[0010] Further, an oil injection hole is provided on the kingpin, and an oil cup is provided on the oil injection hole. Advantageous Effects

[0011] By changing the lower kingpin to a spherical connection, the present utility model increases the frictional contact area, reduces the wear rate of the contact surface, enhances the impact resistance of the universal joint, extends the service life of the universal joint, and reduces the risk of faults occurring during the use of the axle. Description of the Drawings

[0012] Figure 1 is a schematic structural view of a preferred embodiment of the present utility model;

[0013] Figure 2 is a cross-sectional view of a preferred embodiment of the present utility model;

[0014] Figure 3 is a schematic structural view of the upper kingpin and the bushing;

[0015] Figure 4 is a schematic structural view of the lower kingpin, the spherical sleeve and the spherical seat;

[0016] In the figure: steering knuckle 1, upper kingpin 2, grease cup 3, bushing 4, bolt 5, axle housing 6, lower kingpin 7, oil filling hole 8, spherical seat 9, spherical sleeve 10, sealing ring 11, connecting block 12, pin 13. Detailed Embodiment

[0017] To make the technical means, creative features, achieved purposes and effects of the present utility model easy to understand, the present utility model will be further elaborated below in conjunction with the specific embodiments.

[0018] Embodiment: As Figures 1 to 4 shown, it includes a steering knuckle 1 and an axle housing 6. One end of the steering knuckle 1 is provided with a steering knuckle fork, and one end of the axle housing 6 is provided with an axle housing knuckle fork. The steering knuckle fork and the axle housing knuckle fork are movably connected by a kingpin. The kingpin includes an upper kingpin 2 and a lower kingpin 7. The upper knuckle fork of the steering knuckle fork is connected to the upper knuckle fork of the axle housing knuckle fork through the upper kingpin 2, and the lower knuckle fork of the steering knuckle fork is connected to the lower knuckle fork of the axle housing knuckle fork through the lower kingpin 7. Both the upper kingpin 2 and the lower kingpin 7 include a connecting block 12 and a pin 13 integrally connected. A spherical sleeve 10 is sleeved on the pin 13 of the lower kingpin 7. The connecting block 12 is connected to the steering knuckle fork by a bolt 5. The pin 13 is inserted into the holes of the steering knuckle fork and the axle housing knuckle fork. A bushing 4 that cooperates with the pin 13 is provided in the upper knuckle fork hole of the axle housing knuckle fork. A spherical seat 9 that cooperates with the spherical sleeve 10 is provided in the lower knuckle fork hole of the axle housing knuckle fork. The cooperation between the pin 13 of the upper kingpin 2 of the present utility model and the bushing 4 in the upper knuckle fork hole of the axle housing knuckle fork can achieve the free rotation of the upper kingpin 2, and the cooperation between the spherical sleeve 10 of the lower kingpin 7 and the spherical seat 9 can achieve the free rotation of the lower kingpin 7. By changing the lower kingpin 7 to a spherical connection, the present utility model increases the frictional contact area, reduces the wear rate of the contact surface, enhances the impact resistance of the universal joint, extends the service life of the universal joint, and reduces the risk of faults occurring during the use of the axle.

[0019] In this embodiment, a sealing ring 11 for cooperating with and sealing the axle housing joint fork is provided on the pin shaft 13.

[0020] In this embodiment, an oil injection hole 8 is provided on the kingpin, and an oil cup 3 is provided on the oil injection hole 8, which can realize the injection of lubricant to meet the lubrication requirements of the kingpin.

[0021] Since the functions of the upper joint fork and the lower joint fork of the steering knuckle are different when they are connected, the function of the lower joint fork of the steering knuckle is to support, and the main force direction is vertical. The function of the upper joint fork of the steering knuckle is to balance, and the main force direction is horizontal force. Moreover, the upper kingpin 2 cannot be connected by a spherical surface because the upper joint fork of the steering knuckle needs to play an adaptive role when the size of the lower joint fork of the steering knuckle changes due to wear.

[0022] The foregoing has shown and described the basic principles, main features and advantages of the present invention. For those skilled in the art, it is obvious that the present invention is not limited to the details of the above-described exemplary embodiments, and without departing from the spirit or basic characteristics of the present invention, the present invention can be implemented in other specific forms. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present invention. Any reference signs in the claims should not be construed as limiting the claims involved.

[0023] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. Steering knuckle structure of a drive axle, comprising a steering knuckle (1) and a axle housing (6). One end of the steering knuckle (1) is provided with a steering knuckle fork, and one end of the axle housing (6) is provided with an axle housing knuckle fork. The steering knuckle fork and the axle housing knuckle fork are movably connected by a kingpin. It is characterized in that: The kingpin includes an upper kingpin (2) and a lower kingpin (7), The upper fork of the steering knuckle fork is connected to the upper fork of the axle housing fork through the upper kingpin (2), and the lower fork of the steering knuckle fork is connected to the lower fork of the axle housing fork through the lower kingpin (7); Both the upper kingpin (2) and the lower kingpin (7) include a connecting block (12) and a pin shaft (13) integrally connected. A spherical sleeve (10) is sleeved on the pin shaft (13) of the lower kingpin (7); The connecting block (12) is connected to the steering knuckle fork through bolts (5). The pin shaft (13) is inserted into the holes of the steering knuckle fork and the axle housing fork. A bushing (4) matching with the pin shaft (13) is arranged in the upper fork hole of the axle housing fork; A spherical seat (9) matching with the spherical sleeve (10) is arranged in the lower fork hole of the axle housing fork.

2. The steering knuckle structure of the drive axle according to claim 1, characterized in that: A sealing ring (11) for sealing cooperation with the axle housing fork is arranged on the pin shaft (13).

3. The steering knuckle structure of the drive axle according to claim 1, characterized in that: An oil injection hole (8) is arranged on the kingpin, and an oil cup (3) is arranged on the oil injection hole (8).

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