CN218750119U

CN218750119U - Integrated nose cone inner bearing of mining dump truck

Info

Publication number: CN218750119U
Application number: CN202222081149.XU
Authority: CN
Inventors: 宫继成; 李官平; 陈鹏彪; 赵磊; 任超; 徐新程
Original assignee: Inner Mongolia North Hauler JSCL
Current assignee: Inner Mongolia North Hauler JSCL
Priority date: 2022-08-08
Filing date: 2022-08-08
Publication date: 2023-03-28
Anticipated expiration: 2032-08-08

Abstract

The utility model discloses a mining dump truck integral type nose cone inner bearing, include: the frame cross beam and the ball bearing are arranged on the frame cross beam, and the outer wall surface of the ball bearing is a spherical ring surface; the ball bearing and the frame cross beam are of an integrally formed structure. The utility model discloses can avoid the stress accumulation of ball bearing and frame cross member hookup location, strengthen the joint strength of ball bearing and frame cross member.

Description

Integrated nose cone inner bearing of mining dump truck

Technical Field

The utility model belongs to the technical field of mining dump truck, concretely relates to mining dump truck integral type nose cone inner bearing.

Background

The mining dump truck is mainly used for mining and transporting strip mines and works for more than 20 hours every day. Due to the fact that the mining dump truck is large in load capacity and long in working time, and the general road conditions of surface mines are poor, the requirements for the hinged bearing for connecting the frame and the rear axle are particularly high. The hinged bearing comprises a nose cone inner bearing and a bearing outer ring.

As shown in FIG. 1, it is a structural assembly drawing of a bearing in a nose cone in the prior art.

The structure of the currently used nose cone inner bearing is a split structure, two spherical semicircular rings 1 are opposite in position, and the outer edges of the two spherical semicircular rings 1 are welded with a frame cross beam 2; two sphere semicircle rings 1 assemble together and constitute the sphere ring, and the hole diameter of sphere ring is the same with frame cross 2 external diameter, and sphere semicircle ring 1's internal face can't contact with frame cross 2's outer wall, can't weld, therefore sphere semicircle ring 1, frame cross 2 welding position only are in sphere semicircle ring 1's lateral part edge.

Because the nose cone inner bearing needs to bear impact load, torsion load and alternating load, and welding residual stress exists at the welding position, the fatigue crack of the welding part of the nose cone inner bearing and the frame cross beam is easy to occur, and the crack can extend to the frame cross beam, so that the service life of the frame is shortened.

The outer ring bearing also adopts two semicircular outer ring rings, the two semicircular outer ring rings are respectively arranged in two bearing shells of the rear axle, the two semicircular outer ring rings are closed after the two bearing shells are connected by bolts, and the spherical semicircular ring 1 is wrapped and limited by the inner spherical surface of the semicircular outer ring.

Because the nose cone inner bearing can produce the impact force to the bearing inner race, the outer wall of sphere semicircle ring 1 can with the interior sphere relative slip of semicircle outer race ring, sphere semicircle ring 1 can exert radial outside thrust to two semicircle outer race rings for two semicircle outer race rings open to the outside, this open power is whole to be used for connecting the bolt of two bearing housing. Because the load and the vehicle body weight of the mining dump truck are very large, the road condition of the use environment is poor, and the bolt needs to bear the repeated action of large tension, the bolt is easy to break, the rear axle is damaged, and the driving safety is influenced.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a mining dump truck integral type nose awl inner bearing, integral type nose awl inner bearing adopt the whole machine of forging stock to add and form, can avoid the stress accumulation of ball bearing and frame crossbeam hookup location, strengthen the joint strength of ball bearing and frame crossbeam.

In order to achieve the above purpose, the utility model uses the technical solution that:

mining dump truck integral type nose awl inner bearing includes: the frame cross beam and the ball bearing are arranged on the frame cross beam, and the outer wall surface of the ball bearing is a spherical annular surface; the ball bearing and the frame cross beam are of an integrally formed structure; an annular outer ring is arranged outside the ball bearing and comprises two annular split bodies which are opposite in position; an arc-shaped concave surface is arranged on the inner wall of the annular split body, an annular inner oil way is arranged on the arc-shaped concave surface, an annular outer oil way is arranged on the wall surface of the outer wall of the annular split body, a communicating oil way is arranged inside the annular split body, and two ends of the communicating oil way are respectively connected with the annular outer oil way and the annular inner oil way.

Furthermore, the connection between the cylindrical surface of the frame cross beam and the spherical ring surface of the ball bearing adopts curved surface transition connection.

Further, the arc-shaped concave surface is provided with a longitudinal inner oil way and an annular inner oil way, and the longitudinal inner oil way and the annular inner oil way are mutually communicated in a cross way; the two ends of the communicating oil way are respectively connected with the cross connection positions of the annular outer oil way, the longitudinal inner oil way and the annular inner oil way.

The utility model discloses technical effect includes:

the utility model discloses design formula structure as an organic whole with ball bearing and frame crossbeam, bearing adopts the whole machine of forging stock to add to form in the integral type nose cone, has abandoned welded connection, can avoid ball bearing and frame crossbeam hookup location's stress to gather, strengthens the joint strength of ball bearing and frame crossbeam to improve the fatigue life of bearing in the nose cone, improve the reliability of mining dump truck frame.

The utility model discloses can also prevent the outside conduction radial thrust of ball bearing, avoid connecting the bolt breaking occur of two bearing housing, avoid appearing the rear axle and damage.

Drawings

FIG. 1 is a structural assembly view of a prior art nose cone inner bearing;

FIG. 2 is a schematic structural view of the integrated nose cone inner bearing of the dump truck for middle mines of the utility model;

FIG. 3 is a schematic structural view of the middle ring-shaped outer ring of the present invention;

fig. 4 isbase:Sub>A sectional view taken along the linebase:Sub>A-base:Sub>A of fig. 3 according to the present invention.

Detailed Description

The following description sufficiently illustrates specific embodiments of the invention to enable those skilled in the art to practice and reproduce it.

As shown in fig. 2, it is a schematic structural diagram of the integrated nose cone inner bearing of the present invention.

Mining dump truck integral type nose awl inner bearing includes: the frame cross beam 3 and the ball bearing 4 are arranged on the frame cross beam 3, and the ball bearing 4 is arranged on the frame cross beam; the outer wall surface of the ball bearing 4 is a spherical ring surface. The connection between the cylindrical surface of the frame cross beam 3 and the spherical ring surface of the ball bearing 4 adopts curved surface transition connection, so that stress accumulation is avoided.

The ball bearing 4 and the frame cross beam 3 are of an integrated structure and are machined and formed by a forging stock integral machine. Adopt integrated into one piece machine-shaping, stopped welded connection completely, realized ball bearing 4, frame crossbeam 3 full structure rigid connection, the junction does not have the space for firm in connection can bear and relapse great impact force.

The ball bearing 4 can be installed in the two semicircular outer ring rings, but along with the increasing of the load capacity and the self weight of the mining dump truck, the two semicircular outer ring rings need to bear larger impact force in the axial direction and also need to bear larger thrust from the ball bearing 4 in the radial direction, so that the bolt for restraining the two semicircular outer ring rings on the bearing shell bears larger tension.

As shown in fig. 3, it is a schematic structural diagram of the middle ring-shaped outer ring 5 of the present invention; fig. 4 isbase:Sub>A cross-sectional view taken along the directionbase:Sub>A-base:Sub>A of fig. 3 according to the present invention.

In order to further prevent the bolt fracture, the utility model discloses a ring outer lane 5 retrains ball bearing 4, and ring outer lane 5 can independently bear the radial thrust who comes from ball bearing 4, can not be to bolt conduction radial thrust.

The annular outer ring 5 comprises two annular split bodies 51, and the two annular split bodies 51 are opposite in position; the technical problem of mounting the ball bearing 4 in the bearing housing is effectively solved, and each annular split body 51 is of an annular integral structure, so that the radial thrust from the ball bearing 4 can be independently borne.

An arc concave surface 52 is arranged on the inner wall of the annular split body 51, the arc concave surface 52 is provided with a longitudinal inner oil path 53 and an annular inner oil path 54, and the longitudinal inner oil path 53 and the annular inner oil path 54 are communicated in a cross mode; an annular outer oil path 55 is arranged on the wall surface of the outer wall of the annular split body 51, a communication oil path 56 is arranged inside the annular split body 51, and two ends of the communication oil path 56 are respectively connected with the cross connection positions of the annular outer oil path 55, the longitudinal inner oil path 53 and the annular inner oil path 54.

The machining method of the integrated nose cone bearing of the mining dump truck comprises the following specific steps:

step 1: fixing the first forging stock on a workbench of a numerical control machine tool, inputting machining parameters, and machining the forging stock into an integrated nose cone inner bearing by the numerical control machine tool according to the machining parameters;

the processing parameters of the integrated nose cone inner bearing comprise: the length of the frame cross member 3, the position of the ball bearings 4 on the frame cross member 3 and the width and height of the spherical annulus.

Step 2: the axial centers of two sides of the second forging stock are fixed on a workbench, processing parameters are input, an annular outer oil path 55 is processed on the outer wall of the second forging stock, an arc-shaped concave surface 52 is processed on the inner wall, a longitudinal inner oil path 53 and an annular inner oil path 54 are processed on the arc-shaped concave surface 52, a communicating oil path 56 is processed at the crossed position of the annular outer oil path 55, the longitudinal inner oil path 53 and the annular inner oil path 54, and the processing of the annular split body 51 is completed.

The processing parameters of the annular split body 51 comprise: the thickness and the width of the annular split body 51, the position and the depth of the arc-shaped concave surface 52, the positions and the depths of the longitudinal inner oil path 53 and the annular inner oil path 54 on the arc-shaped concave surface 52, and the positions and the depths of the annular outer oil paths 55 on the outer wall of the annular split body 51 are the positions of the communication oil paths 56.

The mounting method of the integrated nose cone bearing of the mining dump truck comprises the following specific steps:

step 1: the two annular split bodies 51 are respectively sleeved on the frame cross beams 3 on the two sides of the ball bearing 4 and integrally hung on one side of the bearing shell;

step 2: the two annular split bodies 51 are attached to two sides of the ball bearing 4, the two bearing shells are buckled together, the ball bearing 4 and the two annular split bodies 51 are located inside the two bearing shells, and the two bearing shells are fixedly connected through bolts.

The terminology used herein is for the purpose of description and illustration, and is not intended to be limiting. As the present invention may be embodied in several forms without departing from the spirit or essential characteristics thereof, it should also be understood that the above-described embodiments are not limited by any of the details of the foregoing description, but rather should be construed broadly within its spirit and scope as defined in the appended claims, and therefore all changes and modifications that fall within the meets and bounds of the claims, or equivalences of such meets and bounds are therefore intended to be embraced by the appended claims.

Claims

1. The utility model provides a mining dump truck integral type nose awl inner bearing which characterized in that includes: the frame cross beam and the ball bearing are arranged on the frame cross beam, and the outer wall surface of the ball bearing is a spherical ring surface; the ball bearing and the frame cross beam are of an integrally formed structure; an annular outer ring is arranged outside the ball bearing and comprises two annular split bodies which are opposite in position; an arc-shaped concave surface is arranged on the inner wall of the annular split body, an annular inner oil way is arranged on the arc-shaped concave surface, an annular outer oil way is arranged on the wall surface of the outer wall of the annular split body, a communicating oil way is arranged inside the annular split body, and two ends of the communicating oil way are respectively connected with the annular outer oil way and the annular inner oil way.

2. The integrated nose cone inner bearing of the mining dump truck as claimed in claim 1, wherein the junction of the cylindrical surface of the frame cross beam and the spherical ring surface of the ball bearing is in curved surface transition connection.

3. The integrated nose cone inner bearing of the mining dump truck as claimed in claim 1, wherein the arc-shaped concave surface is provided with a longitudinal inner oil path and an annular inner oil path, and the longitudinal inner oil path and the annular inner oil path are mutually communicated in a cross manner; the two ends of the communicating oil way are respectively connected with the cross connection positions of the annular outer oil way, the longitudinal inner oil way and the annular inner oil way.