CN217002642U

CN217002642U - Novel anti-rotation and anti-shearing fuselage connecting structure

Info

Publication number: CN217002642U
Application number: CN202220272667.7U
Authority: CN
Inventors: 谷田野; 毕涛; 张博; 初成伍; 田艳丽; 孙文心; 孙天明
Original assignee: Jilin Machinery Equipment Manufacturing Co ltd
Current assignee: Jilin Machinery Equipment Manufacturing Co ltd
Priority date: 2022-02-10
Filing date: 2022-02-10
Publication date: 2022-07-19
Anticipated expiration: 2032-02-10

Abstract

The utility model discloses a novel anti-rotation and anti-shearing machine body connecting structure which comprises a rotary lug sleeve, a key groove type pin shaft, a key plate type end cover and a screw, wherein the rotary lug sleeve is connected in a shell lug hole of a shell in an interference mode, the key groove type pin shaft is connected in the rotary lug sleeve in a small gap mode, key grooves are formed in two ends of the key groove type pin shaft, the key plate type end cover is of a square design, a key is fixedly connected to one side of the key plate type end cover, the two ends of the key groove type pin shaft are matched with the key through the key grooves, so that the key groove type pin shaft and the key plate type end cover are rigidly fixed, and the key plate type end cover is connected with the shell through the screw. The utility model can not cause the deformation of the ear hole of the shell, reduces the damage of the rotary ear cap and the pin shaft and ensures that the connection is more stable and reliable.

Description

Novel fuselage connection structure capable of preventing rotation and shearing

Technical Field

The utility model belongs to the technical field of coal mining machines, and particularly relates to a novel anti-rotation and anti-shearing machine body connecting structure.

Background

Along with the increasing difficulty of mechanized mining of mines in recent years, the mining conditions of underground working conditions are also increasingly severe, so that the requirements on the strength, reliability and stability of various large parts on a coal mining machine are also increasingly high.

When the coal mining machine works, the rocker arm on the cutting part swings up and down, the oil cylinder stretches and retracts, the machine body connecting structure between the rocker arm support lug and the oil cylinder support lug can rotate to a certain degree, in order to reduce relative rotation of all connecting parts, the installation relation of the rotary lug sleeve and the shell is designed to be in interference fit, the installation relation of the pin shaft and the rotary lug sleeve is designed to be in clearance fit, and the end cover is designed to be circular.

As shown in fig. 8, the existing machine body connection structure includes a rotary lug sleeve 1, a pin shaft 2, a circular end cover 3 and a screw 4, the rotary lug sleeve 1 is connected in a housing ear hole 7-1 of a housing 7 in an interference manner, the pin shaft 2 is connected in the rotary lug sleeve 1 in a clearance manner, the circular end covers 3 are arranged at two ends of the pin shaft 2, a clearance is reserved between the circular end covers 3 and the pin shaft 2, and the circular end cover 3 is connected with the housing 7 through the screw 4, the purpose of the machine body connection structure is to be achieved that when a coal mining machine works, each hinged part rotates, the rotary lug sleeve 1 keeps a static state relative to the housing, the pin shaft 2 also keeps a static state relative to the rotary lug sleeve 1, the circular end cover 3 is connected to the housing 7 through the screw 4 to prevent the pin shaft 2 from axially moving, but due to severe underground working conditions, the coal mining machine can generate very large vibration in a cutting process, after a long time, a gap is generated between the rotary earmuff 1 and the shell 7, once the gap is too large, the rotary earmuff 1 and the shell 7 can rotate relatively, and the rotary earmuff 1 can also rotate relatively to the pin shaft 2, if the phenomenon that the rotary earmuff 1 and the pin shaft 2 are damaged in time is discovered, the shell earhole 7-1 can be abraded and deformed, and the mechanical performance of the whole machine is directly influenced.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the problems and provides a novel connecting structure of a machine body, which can not cause the deformation of an ear hole of a shell, reduce the damage of a rotary ear sleeve and a pin shaft, and is more stable and reliable in rotation prevention and shear prevention.

In order to achieve the purpose, the utility model provides a novel anti-rotation and anti-shearing machine body connecting structure which comprises a rotary lug sleeve, a key groove type pin shaft, a key plate type end cover and a screw, wherein the rotary lug sleeve is connected in a shell lug hole of a shell in an interference mode, the key groove type pin shaft is connected in the rotary lug sleeve in a small gap mode, key grooves are formed in two ends of the key groove type pin shaft respectively, the key groove type end cover is of a square design, a key is fixedly connected to one side of the key plate type end cover, the key groove type pin shaft and the key plate type end cover are rigidly fixed through the mutual matching of the key grooves and the key, and the key plate type end cover is connected with the shell through the screw.

Advantages and advantageous effects of the utility model

1. The original round end cover is modified into a square key board type end cover, the key board type end cover is in a square design, the four edges of the end cover are in small clearance fit with the shell and are positioned by the four edges of the square key board type end cover, shearing force generated when a cutting part of the coal mining machine swings up and down is borne by the key board type end cover and the shell, and screws on the key board type end cover cannot directly bear the shearing force and only bear the action of axial force, so that the danger that the screws are cut off is avoided.

2. The key plate type end cover is provided with the key, the key groove type pin shaft is provided with the key groove, the key plate type end cover and the key groove type pin shaft are rigidly fixed through the mutual matching of the key and the key groove, and the key plate type end cover and the key groove type pin shaft are kept in a static state; when the cutting part swings up and down, no matter how large mining vibration exists, the keyway type pin shaft keeps in a static state all the time and does not rotate relatively, so that the wear and deformation of the ear hole of the shell can not be caused, the damage to the rotary earcap and the keyway type pin shaft is reduced, and the connection reliability and stability of the whole machine are greatly improved.

3. The key groove on the key groove type pin shaft is a through groove, the processing is simple and convenient, the reliability of the connection between the key groove type pin shaft and the key plate type end cover can be improved through the connection between the key and the key groove, and the rotation of the key groove type pin shaft is further prevented.

4. The utility model has simple structure and wide applicability, and can be applied to oil cylinder trunnion connection, fixed shaft type rotating mechanisms and the like.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is apparent that the drawings in the following description are only embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the provided drawings without creative efforts.

FIG. 1 is a schematic view of the overall structure of a coal mining machine employing the connection structure of the present invention;

FIG. 2 is a cross-sectional view of the utility model of FIG. 1;

FIG. 3 is a cross-sectional view of the overall construction of the present invention;

FIG. 4 is a body view of a keypad-type end cap of the present invention;

FIG. 5 is a top view of the utility model of FIG. 4;

FIG. 6 is a schematic structural view of a keyway pin of the present invention;

FIG. 7 is a front view of a splined pin of the present invention;

FIG. 8 is a cross-sectional view of a prior art attachment structure;

fig. 9 is a front view of a conventional connection structure.

Reference numerals, a rotary lug sleeve 1, a pin shaft 2, a circular end cover 3, a screw 4, a key groove type pin shaft 5, a key groove 5-1, a key plate type end cover 6, a key 6-1, a shell 7 and a shell ear hole 7-1.

Detailed Description

The following detailed description of embodiments of the utility model refers to the accompanying drawings.

As shown in figures 1-3, a novel anti-rotation and anti-shearing fuselage connection structure comprises a rotary lug sleeve 1, a key groove type pin shaft 5, a key plate type end cover 6 and a screw 4, wherein the rotary lug sleeve 1 is connected in a shell ear hole 7-1 of a shell 7 in an interference manner, so that the rotary lug sleeve 1 can be prevented from rotating relative to the shell 7, a key groove type pin shaft 5 is connected in the rotary lug sleeve 1 in a small clearance manner, key grooves 5-1 are respectively arranged at two ends of the key groove type pin shaft 5, the key grooves 5-1 are through holes, the processing is simple and convenient, the key groove type pin shaft 5 is made of 42CrMo, the heat treatment hardening and tempering reaches 260 and 300HB, the surface quenching hardness reaches 50-55HRC, the processed key groove type pin shaft 5 is not easy to deform, the key plate type end cover 6 adopts a square design, so that four sides of the key plate type end cover 6 are matched with the shell 7 in a small clearance manner, the cutting part of the coal mining machine swings up and down by positioning the four sides of the square key plate type end cover 6, the shearing force generated when the cutting part swings down is borne by the key plate type end cover 6 and the shell 7, the screw 4 on the key plate type end cover 6 is not directly stressed by the shearing force and only stressed by the axial force, the danger that the screw 4 is sheared off is avoided, the material of the key plate type end cover 6 is 40Cr or 45# steel, and the heat treatment hardening and tempering is up to 240 HB and 280HB, so that the material of the key plate type end cover 6 can be hardened after the processing, the deformation of the key plate type end cover 6 is prevented, one side of the key plate type end cover 6 is fixedly connected with the key 6-1, the two ends of the key groove type pin 5 are mutually matched through the key groove 5-1 and the key 6-1 to rigidly fix the key groove type pin 5 and the key plate type end cover 6, the reliability of the connection of the key groove type pin 5 and the key plate type end cover 6 can be improved through the connection of the key groove 6-1 and the key groove 5-1, further prevent the rotation of keyway formula round pin axle 5, the keypad type end cover 6 is connected with casing 7 through screw 4, can prevent keyway formula round pin axle 5 and prolong the axle direction drunkenness.

Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the embodiments of the present invention, and are not limited thereto; although embodiments of the present invention have been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the embodiments of the present invention.

Claims

1. The utility model provides a prevent novel fuselage connection structure of rotation, anti-shear which characterized in that: the key plate type hinge pin comprises a rotary lug sleeve (1), a key groove type hinge pin (5), a key plate type end cover (6) and a screw (4), wherein the rotary lug sleeve (1) is connected in a shell lug hole (7-1) of a shell (7) in an interference mode, a key groove type hinge pin (5) is connected in the rotary lug sleeve (1) in a small gap mode, key grooves (5-1) are formed in two ends of the key groove type hinge pin (5), the key plate type end cover (6) is of a square design, a key (6-1) is fixedly connected to one side of the key plate type end cover (6), the key groove type hinge pin (5) and the key plate type end cover (6) are rigidly fixed at two ends of the key groove type hinge pin (5) through the mutual matching of the key grooves (5-1) and the key (6-1), and the key plate type end cover (6) is connected with the shell (7) through the screw (4).