CN218440618U

CN218440618U - Main pin end cover sealing structure

Info

Publication number: CN218440618U
Application number: CN202223004040.2U
Authority: CN
Inventors: 张幸福; 薄瑶; 于文博
Original assignee: China National Heavy Duty Truck Group Jinan Power Co Ltd
Current assignee: China National Heavy Duty Truck Group Jinan Power Co Ltd
Priority date: 2022-11-11
Filing date: 2022-11-11
Publication date: 2023-02-03
Anticipated expiration: 2032-11-11

Abstract

The utility model discloses a seal structure of a main pin end cover, which comprises a fixing bolt, a gasket, a grease nozzle assembly, a main pin end cover, an O-shaped ring, a steering knuckle and a main pin, wherein a groove structure is arranged at the outer side of the lower end of the main pin end cover, and the O-shaped ring is preassembled in a groove at the lower end of the main pin end cover; the main pin end cover is provided with an upper spigot structure and a lower spigot structure, and is fixed on the steering knuckle through three fixing bolts and three gaskets. The two rabbets are arranged on the main pin end cover, so that the radial deviation of the main pin end cover is avoided, the installation precision is ensured, and meanwhile, the grooves are not deformed; the lower spigot is in clearance fit, the precise fit length of the upper spigot is shortened, and the convenience in mounting and dismounting is ensured; the volume of the oil storage cavity is increased, and the lubricating effect of the bearing is improved.

Description

Main pin end cover sealing structure

Technical Field

The utility model relates to a novel swizzle end cover structure especially relates to a commercial car front axle swizzle end cover seal structure, belongs to commercial car technical field.

Background

The main pin is a key part for steering the front axle, and the lubrication of the main pin requires a closed working environment to ensure that the lubricating grease is not influenced by impurities (dust, sewage and the like) and ensure the steering reliability and durability. The sealing performance is mainly ensured by the main pin end cover and the sealing ring. Most of existing products are of structures shown in figure 1, a main pin end cover 4 is fixed on a steering knuckle 6 through a bolt, an O-shaped ring 5 is pressed in a groove on the steering knuckle 6, the sealing performance of the structure is guaranteed by the lower surface of the main pin end cover 4, the O-shaped ring and the groove surface of the steering knuckle 6, and an oil storage cavity is formed by the lower surface of the main pin end cover 4, the O-shaped ring 5, the steering knuckle 6 and the upper end surface of a main pin 7.

The structure of the existing product has the following defects:

1. the main pin end cover 4 is fixed on the steering knuckle 6 through three fixing bolts, the used bolts are M8, the hole diameter of the end cover is 8.5, the three fixing bolts are difficult to ensure the same stress in the installation process, and radial deviation possibly exists, so that the main pin end cover 4 and the main pin hole are not coaxial and deflect to one side for a long time, and a groove formed by matching the end cover 4 and the steering knuckle 6 deforms, so that the O-shaped ring 5 is extruded unevenly and fails in an accelerating manner;

2. the volume of the oil storage cavity formed by the structure is small, the stored lubricating oil is less, and the lubricating effect is poor.

Disclosure of Invention

The utility model aims to solve the technical problem that to the defect that prior art exists, a commercial car front axle king pin end cover seal structure is provided.

In order to solve the technical problem, the utility model provides a seal structure of a main pin end cover, which comprises a fixing bolt, a gasket, a grease nozzle assembly, a main pin end cover, an O-shaped ring, a steering knuckle and a main pin, wherein a groove structure is arranged at the outer side of the lower end of the main pin end cover, and the O-shaped ring is pre-installed in a groove at the lower end of the main pin end cover; the main pin end cover is provided with an upper spigot and a lower spigot, and the main pin end cover is fixed on the steering knuckle through three fixing bolts and three gaskets.

And the main pin end cover upper spigot is precisely matched with the steering knuckle.

And the lower spigot of the main pin end cover is in clearance fit with the steering knuckle.

The king pin end cover adopts and forges integrated into one piece, and oil storage chamber department minimum wall thickness is 2mm, increases oil storage chamber volume.

Has the advantages that: the utility model discloses on current foundation structure's basis, designed neotype swizzle end cover seal structure, new construction has following apparent advantage: 1) The upper spigot of the main pin end cover is precisely matched with the knuckle pin hole, so that the radial deviation of the main pin end cover is avoided, the mounting precision of the main pin end cover is ensured, and meanwhile, the groove is not deformed any more, so that a good working environment is provided for the O-shaped ring; 2) The O-shaped ring is preassembled in a groove on the end cover of the main pin, so that the O-shaped ring is positioned while the installation process is optimized; 3) The main pin end cover is in clearance fit with the steering knuckle through the lower spigot, the precision fit length of the upper spigot is shortened, and the production, installation and after-sale disassembly are very convenient; 4) The main pin end cover has the advantages that the volume of the oil storage cavity is increased through structural optimization, and the lubricating effect of the bearing is improved.

Drawings

FIG. 1 is a schematic view of a prior art king pin end cap seal arrangement;

FIG. 2 is a schematic structural view of the present invention;

FIG. 3 is a schematic structural view of the main pin end cover, O-ring and grease nipple assembly of the present invention;

figure 4 is the utility model discloses the local enlargements of king pin end cover and knuckle cooperation.

In the figure: 1. fixing the bolt; 2. a gasket; 3. a grease nipple assembly; 4. a king pin end cap; 5. an O-shaped ring; 6. a knuckle; 7. a kingpin; 8. an upper seam allowance; 9. and a lower spigot.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings and examples.

As shown in fig. 2, 3 and 4, the utility model provides a seal structure for end cover of main pin, including fixing bolt 1, gasket 2, grease mouth assembly 3, end cover of main pin 4, O-ring 5, knuckle 6 and main pin 7, the outer side of the lower end of end cover of main pin 4 is equipped with the groove structure, O-ring 5 is pre-installed in the groove of the lower end of end cover of main pin 4, and the O-ring 5 is positioned while optimizing the installation process, thereby effectively avoiding the uneven stress of O-ring 5 and prolonging the service life thereof; the main pin end cover 4 is provided with an upper spigot 8 and a lower spigot 9; the kingpin end cap 4 is fixed to the knuckle 6 by three fixing bolts 1 and three washers 2.

The kingpin end cover 4, the top spigot 8 and the knuckle 6 are precisely matched with the N7/e8, so that the mounting precision is ensured, and the bottom spigot 9 and the knuckle 6 are in small clearance fit, so that the assembly and disassembly are convenient.

Main pin end cover 4 adopts and forges the integrated into one piece design, and oil storage chamber department minimum wall thickness 2mm has effectively increased the oil storage chamber volume.

The utility model discloses accurate cooperation between main pin end cover top end socket and the knuckle pinhole has avoided the radial skew of main pin end cover, has guaranteed its installation accuracy, and the slot is out of shape again simultaneously, provides good operational environment for the O shape circle; the O-shaped ring is preassembled in a groove on the end cover of the main pin, so that the O-shaped ring is positioned while the installation process is optimized; the main pin end cover is in clearance fit with the steering knuckle through the lower spigot, the precision fit length of the upper spigot is shortened, and the production, installation and after-sale disassembly are very convenient; the main pin end cover increases the volume of an oil storage cavity through structural optimization, and the lubricating effect of the bearing is improved.

Compared with the prior art, the utility model, strengthened sealing performance, simplified the assembling process, prolonged the life-span of O shape circle, promoted the lubricated effect of bearing, effectively prolonged the life of swizzle and bearing.

The above embodiments of the present invention are merely examples, not the only ones, and all changes within the scope of the present invention or the same range of the present invention are all surrounded by the present invention.

Claims

1. The utility model provides a swizzle end cover seal structure which characterized in that: the oil nozzle comprises a fixing bolt (1), a gasket (2), an oil nozzle assembly (3), a main pin end cover (4), an O-shaped ring (5), a steering knuckle (6) and a main pin (7), wherein a groove structure is arranged on the outer side of the lower end of the main pin end cover (4), and the O-shaped ring (5) is preassembled in a groove at the lower end of the main pin end cover (4); the main pin end cover (4) is provided with an upper spigot (8) and a lower spigot (9) which are of two spigot structures, and the main pin end cover (4) is fixed on the steering knuckle (6) through three fixing bolts (1) and three gaskets (2).

2. The king pin end cap seal arrangement of claim 1, wherein: and an upper stop opening (8) of the main pin end cover (4) is precisely matched with the steering knuckle (6).

3. The king pin end cap seal arrangement of claim 1, wherein: and the lower spigot (9) of the main pin end cover (4) is in clearance fit with the steering knuckle (6).

4. A king pin end cap seal according to claim 1, 2 or 3, wherein: main pin end cover (4) adopt and forge integrated into one piece, and oil storage chamber department minimum wall thickness 2mm increases oil storage chamber volume.