Axle housing assembly structure and drive axle

Abstract

The utility model discloses an axle housing assembly structure and a drive axle. The axle housing assembly structure comprises a steering knuckle, an axle housing and two main pins, the key points of the utility model are as follows: the two mounting parts of the steering knuckle are respectively provided with a through hole; a pin hole corresponding to each through hole is formed in the end part of the axle housing; the main pin is matched with the through hole and the pin hole, the main pin is provided with a contact face making contact with the end and sleeved with a thrust washer located between the contact face and the end, and the thrust washer and the end are further provided with a limiting structure used for limiting rotation of the thrust washer in a matched mode. The limiting structure comprises a groove formed in one of the thrust washer and the end part and a convex part arranged on the other one of the thrust washer and the end part, the groove is formed in the radial direction of the master pin, and the convex part is clamped with the groove, so that the thrust washer can be prevented from rotating relative to the end part, the abrasion of the end part is reduced, and the service life of the master pin is prolonged. The service life and the steering reliability of the axle housing are further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile accessories, in particular to an axle housing assembly structure and a drive axle. Background Art

[0002] The existing axle housing assembly structure of the engineering vehicle drive axle includes two steering knuckles, axle housing and four kingpins. The top and bottom ends of the steering knuckles are respectively provided with a mounting portion, each mounting portion is provided with a through hole running through it from top to bottom, and the axle housing has two ends, one end is provided between the two mounting portions of a steering knuckle, each end has a pin hole corresponding to each through hole, and the two ends of each kingpin are respectively matched with a corresponding through hole and a pin hole, that is, each steering knuckle is rotatably connected to one end of the axle housing through two kingpins, so that the steering energy can be rotated relative to the axle housing to realize the steering of the engineering vehicle. However, the ends of the axle housing of the above structure are easy to wear, resulting in a short service life. Utility Model Content

[0003] In view of the deficiencies in the prior art, the purpose of the utility model is to provide a bridge housing assembly structure and a drive axle that prevents the thrust washer from rotating relative to the end to reduce end wear by arranging mutually engaging grooves and protrusions on the ends of the thrust washer and the bridge housing.

[0004] To achieve the above purpose, the embodiment of the utility model adopts the following technical solutions:

[0005] The axle housing assembly structure includes a steering knuckle, axle housing and two kingpins;

[0006] The steering knuckle has two mounting parts arranged vertically, and the two mounting parts are respectively provided with a through hole penetrating vertically therethrough;

[0007] The end of the bridge housing is arranged between the two mounting parts, and the end is provided with a pin hole corresponding to each through hole;

[0008] One ends of the two main pins are respectively matched with the two through holes, and the other ends of the two main pins are respectively rotatably matched with the two pin holes. The main pin has a contact surface that contacts the end portion and is sleeved with a thrust washer located between the contact surface and the end portion. The thrust washer and the end portion are also matched with each other to provide a limiting structure for limiting the rotation of the thrust washer. The limiting structure includes a groove provided on one of the thrust washer and the end portion and a convex portion provided on the other of the thrust washer and the end portion. The groove is opened along the radial direction of the main pin, and the convex portion is engaged with the groove.

[0009] Furthermore, a groove is concavely formed upward on the bottom surface of the end portion, and the groove extends radially along the kingpin, and a convex portion is convexly extended from the upper end surface of the thrust washer.

[0010] Furthermore, the upper end surface of the thrust washer abuts against the bottom surface of the end portion, the lower end surface of the thrust washer abuts against the contact surface, the groove passes through the pin hole along the radial direction of the king pin and penetrates the opposite side walls of the end portion, and the protrusion extends along the radial direction of the king pin.

[0011] Furthermore, a bushing is fixed in each of the pin holes, and the inner circumferential wall of each bushing is recessed outward to form an oil guide groove, and the oil guide groove extends to the two end surfaces of the bushing in the up and down directions. The other end of the main pin is loosely fitted in the bushing, and the main pin is also provided with an oil delivery channel running through its two ends, and the oil delivery channel is connected to the oil guide groove.

[0012] Furthermore, the bushing is fitted with the thrust washer corresponding thereto, and a lubricating oil passage is provided on the end surface of the thrust washer in contact with the contact surface. The lubricating oil passage extends around the circumference of the kingpin and is connected with the oil guide groove.

[0013] Furthermore, a sealing plug is fixed in each of the pin holes for closing the pin holes, and the sealing plug is located at an end of the bushing away from the contact surface, and the end surface of the sealing plug close to the bushing is recessed toward the inner cavity of the bridge housing relative to and corresponding to the kingpin end surface to form a recess, and an oil storage space connected to the oil guide groove is formed between the recess and the corresponding kingpin end surface.

[0014] Furthermore, the two king pins pass through the top and bottom surfaces of the two mounting parts upward and downward respectively, and a fixing part is formed at the parts where the two king pins pass through the top and bottom surfaces of the two mounting parts respectively, and an adjustment gasket is provided between each of the fixing parts and the corresponding mounting part to abut against the two, and the adjustment gasket is fixedly connected to the mounting part and is sleeved on the outer peripheral wall of the king pin.

[0015] The bridge housing assembly structure of the utility model has a limit structure for limiting the rotation of the thrust washer by cooperating with the thrust washer and the end. The limit structure includes a groove provided on one of the thrust washer and the end and a convex portion provided on the other of the thrust washer and the end. The groove is opened along the radial direction of the kingpin, and the convex portion is engaged with the groove, so that the thrust washer can be prevented from rotating relative to the end, so that the wear of the end is reduced, and the service life and steering reliability of the bridge housing are further improved. Not only is the structure simple, but also the thrust washer can be directly taken out during maintenance, so that disassembly and assembly are simple. The bridge housing assembly structure of the utility model has the characteristics of simplicity and low cost.

[0016] An embodiment of the utility model further provides a drive axle, comprising the axle housing assembly structure described in any one of the above embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1It is a partial exploded schematic diagram of the bridge housing assembly structure of an embodiment of the utility model;

[0018] Figure 2 for Figure 1 A magnified view of the local area A;

[0019] Figure 3 for Figure 1 A partial cross-sectional view of . DETAILED DESCRIPTION

[0020] Below, in conjunction with the accompanying drawings and specific implementation methods, the utility model is further described:

[0021] like Figures 1 to 3 As shown, an embodiment of the utility model provides a bridge housing assembly structure, which is applied to a drive axle of an engineering vehicle, and includes a steering knuckle 1, a bridge housing 2 and two kingpins 3. The steering knuckle 1 is rotatably connected to the bridge housing 2 through the kingpins 3.

[0022] There are two steering knuckles 1, each of which has two mounting parts 11 arranged vertically, and each of the two mounting parts 11 has a through hole 12 running vertically therethrough. Specifically, there are two steering knuckles 1, each of which has an accommodating cavity inside, and is open at both ends of the steering knuckle 1. The axle housing 2 has two end parts 21, each of which is arranged between the two mounting parts 11 of a steering knuckle 1, and the end part 21 has a pin hole 211 corresponding to each through hole 12. When installing, one end part 21 of the axle housing 2 is inserted into an accommodating cavity from the opening of a steering knuckle 1.

[0023] One end of the two kingpins 3 is respectively matched with the two through holes 12, and the other end of the two kingpins 3 is respectively matched with the two pin holes 211 for rotation, that is, each steering knuckle 1 is connected with an end 21 for rotation through the two kingpins 3. The kingpin 3 has a contact surface 31 in contact with the end 21 and is sleeved with a thrust washer 4 located between the contact surface 31 and the end 21. The thrust washer 4 and the end 21 are also matched with each other to provide a limiting structure 5 for limiting the rotation of the thrust washer 4. The limiting structure 5 includes a groove 51 provided on one of the thrust washer 4 and the end 21 and a convex portion 52 provided on the other of the thrust washer 4 and the end 21. The groove 51 is opened along the radial direction of the kingpin 3, and the convex portion 52 is engaged with the groove 51, which can prevent the thrust washer 4 from rotating relative to the end 21, so that the wear of the end 21 is reduced, and the service life and steering reliability of the bridge housing 2 are further improved. Not only is the structure simple, but also the thrust washer 4 can be directly taken out during maintenance, so that the disassembly and assembly are simple.

[0024] In this embodiment, the two kingpins 3 pass through the top and bottom surfaces of the two mounting portions 11 upwardly and downwardly respectively. A fixing portion 33 is formed at the positions where the two kingpins 3 pass through the top and bottom surfaces of the two mounting portions 11. In order to facilitate adjustment of the gap between the kingpin 3 and the contact surface 31, an adjusting gasket (not shown) is provided between each fixing portion 33 and its corresponding mounting portion 11 to abut against the two. The adjusting gasket is fixedly connected to the mounting portion 11 by bolts and is sleeved on the outer peripheral wall of the kingpin 3.

[0025] In order to facilitate processing and replacement, specifically, a groove 51 is concavely provided upward on the bottom surface of the end portion 21, the groove 51 extends in the radial direction of the kingpin 3, and a convex portion 52 is integrally extended from the upper end surface of the thrust washer 4; in order to ensure stable positioning, more specifically, the upper end surface of the thrust washer 4 abuts against the bottom surface of the end portion 21, the lower end surface of the thrust washer 4 abuts against the contact surface 31, the groove 51 passes through the pin hole 211 in the radial direction of the kingpin 3 and penetrates the opposite side walls of the end portion 21, and the convex portion 52 extends in the radial direction of the kingpin 3. Of course, in other embodiments, in order to further improve the service life, a groove 51 can be concavely provided downward on the top surface of the end portion 21, and correspondingly, the convex portion 52 is integrally extended from the bottom surface of the thrust washer 4 corresponding to the top surface of the end portion 21, and the specific selection can be made according to actual needs.

[0026] A bushing 212 is fixed in each pin hole 211. The steering bushing 212 can reduce the friction and wear between the kingpin 3 and the pin hole 211. When repairing, only the worn bushing 212 needs to be replaced. In order to improve the lubrication effect of the kingpin 3, an oil guide groove (not shown) for conveying lubricating grease is formed on the inner peripheral wall of each bushing 212. The oil guide groove extends to the two end surfaces of the bushing 212 in the up and down direction to convey the lubricating grease to the two end surfaces of the bushing 212. The other end of the kingpin 3 is loosely fitted in the bushing 212. The kingpin 3 is also provided with an oil delivery channel 32 running through both ends thereof. The oil delivery channel 32 is connected to the oil guide groove to inject lubricating grease into the bushing 212. In this embodiment, the bushing 212 and the corresponding thrust washer 4 are fitted together, and a lubricating oil passage 41 is provided on the end surface of the thrust washer 4 that contacts the contact surface 31. The lubricating oil passage 41 extends circumferentially around the kingpin 3 and is connected to the oil guide groove, so that the lubricating grease can lubricate the end surface of the thrust washer 4 and the contact surface 31, which can further improve the lubrication effect.

[0027] In order to prevent oil leakage and ensure the lubrication effect, a sealing plug 6 for closing the pin hole 211 is welded and fixed in each pin hole 211. The sealing plug 6 is located at the end of the bushing 212 away from the contact surface 31, and the end surface of the sealing plug 6 close to the bushing 212 is concavely arranged relative to the end surface of the kingpin 3 corresponding thereto toward the inner cavity of the bridge housing 2 to form a concave position 61. The concave position 61 makes the sealing plug 6 arc-shaped, and an oil storage space 62 connected to the oil guide groove is formed between the concave position 61 and the end surface of the kingpin 3 corresponding thereto. This sealing plug 6 can store a certain amount of lubricating grease while blocking the lubricating grease.

[0028] The bridge housing assembly structure of the utility model has a limit structure for limiting the rotation of the thrust washer by cooperating with the thrust washer and the end. The limit structure includes a groove provided on one of the thrust washer and the end and a convex portion provided on the other of the thrust washer and the end. The groove is opened along the radial direction of the kingpin, and the convex portion is engaged with the groove, so that the thrust washer can be prevented from rotating relative to the end, so that the wear of the end is reduced, and the service life and steering reliability of the bridge housing are further improved. Not only is the structure simple, but also the thrust washer can be directly taken out during maintenance, so that disassembly and assembly are simple. The bridge housing assembly structure of the utility model has the characteristics of simplicity and low cost.

[0029] An embodiment of the utility model further provides a drive axle, which is a drive axle of an engineering vehicle, and includes the axle housing assembly structure described in any one of the above embodiments.

[0030] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein, and these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. The bridge housing assembly structure is characterized by: Including steering knuckle, axle housing and two kingpins; The steering knuckle has two mounting parts arranged vertically, and the two mounting parts are respectively provided with a through hole penetrating vertically therethrough; The end of the bridge housing is arranged between the two mounting parts, and the end is provided with a pin hole corresponding to each through hole; One ends of the two main pins are respectively matched with the two through holes, and the other ends of the two main pins are respectively rotatably matched with the two pin holes. The main pin has a contact surface that contacts the end portion and is sleeved with a thrust washer located between the contact surface and the end portion. The thrust washer and the end portion are also matched with each other to provide a limiting structure for limiting the rotation of the thrust washer. The limiting structure includes a groove provided on one of the thrust washer and the end portion and a convex portion provided on the other of the thrust washer and the end portion. The groove is opened along the radial direction of the main pin, and the convex portion is engaged with the groove.

2. The bridge housing assembly structure according to claim 1, characterized in that: The bottom surface of the end portion is upwardly concavely provided with a groove, the groove extending in the radial direction of the king pin, and the upper end surface of the thrust washer is convexly provided with a convex portion.

3. The bridge housing assembly structure according to claim 2, characterized in that: The upper end surface of the thrust washer abuts against the bottom surface of the end portion, the lower end surface of the thrust washer abuts against the contact surface, the groove passes through the pin hole along the radial direction of the king pin and penetrates the opposite side walls of the end portion, and the protrusion extends along the radial direction of the king pin.

4. The bridge housing assembly structure according to claim 1, characterized in that: A bushing is fixed in each of the pin holes, and the inner circumferential wall of each bushing is recessed outward to form an oil guide groove, which extends to the two end surfaces of the bushing in the up and down directions. The other end of the main pin is loosely fitted in the bushing, and the main pin is also provided with an oil delivery channel running through its two ends, and the oil delivery channel is connected to the oil guide groove.

5. The bridge housing assembly structure according to claim 4, characterized in that: The bushing is fitted with the thrust washer corresponding thereto, and a lubricating oil passage is provided on the end surface of the thrust washer in contact with the contact surface. The lubricating oil passage extends around the circumference of the kingpin and is communicated with the oil guide groove.

6. The bridge housing assembly structure according to claim 4, characterized in that: A sealing plug is fixed in each of the pin holes for closing the pin holes. The sealing plug is located at an end of the bushing away from the contact surface, and the end surface of the sealing plug close to the bushing is recessed toward the inner cavity of the bridge housing relative to the corresponding kingpin end surface to form a recess, and an oil storage space connected to the oil guide groove is formed between the recess and the corresponding kingpin end surface.

7. The axle housing assembly structure according to claim 1, characterized in that: The two main pins pass through the top and bottom surfaces of the two mounting parts upward and downward respectively, and a fixing part is formed at the parts where the two main pins pass through the top and bottom surfaces of the two mounting parts respectively, and an adjustment gasket is provided between each of the fixing parts and the corresponding mounting part to abut against the two, and the adjustment gasket is fixedly connected to the mounting part and is sleeved on the outer peripheral wall of the main pin.

8. Drive axle, characterized in that, It comprises the bridge housing assembly structure as described in any one of claims 1 to 7.

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