Articulated installation structure of crusher for coal mining machine

Abstract

The present invention relates to a crusher hinged installation structure for a coal mining machine, wherein a slewing hole extending forward and backward is provided on the hinged end of the crusher housing, a hinged ear seat is provided on the traction part housing of the coal mining machine, the hinged ear seat and the main body of the traction part housing are respectively provided with coaxial rear ear holes and front ear holes, a countersunk hole is provided on the rear end surface of the hinged ear seat, the countersunk hole is eccentric relative to the rear ear hole, the front ear hole is communicated with the wiring cavity inside the traction part, the front and rear parts of a pipe fitting are both supported in the traction part housing, the middle part of the pipe fitting passes through the crusher housing, the radially outwardly convex and eccentric ring platform at the rear end of the pipe fitting is just embedded and fixed in the countersunk hole, a side hole connected to the wiring cavity in the crusher housing is opened on the side wall of the pipe fitting, and the crusher pipeline is led out from the wiring cavity inside the traction part housing, and enters the crusher housing through the inner cavity of the pipe fitting and the side hole in turn. The present invention can significantly improve the reliability of the hinged connection between the crusher and the coal mining machine, and provide closed protection for the crusher pipeline.

Description

Technical Field

[0001] The invention relates to an installation structure for connecting and installing a crusher on a coal mining machine, belonging to the technical field of mining equipment. Background Art

[0002] Coal mining machine is the main equipment for mining coal in my country's fully mechanized mining face. In the working face of medium-thick coal seams and thick coal seams, large pieces of coal often appear due to impact ground pressure and other reasons. Coal mining machines are generally equipped with crushers to assist in crushing large pieces of coal, ensuring that large pieces of coal can pass under the coal mining machine body and facilitate the transportation of scrapers. Because the crusher is often subjected to harsh working conditions such as impact loads and overloads during the crushing of large pieces of coal, the existing crushers often have the following main problems:

[0003] 1. The structural reliability of the hinge between the crusher and the coal mining machine is poor. Due to the large impact load and frequent vibration, the hinge connection often becomes loose or even the screw fasteners are cut after a period of use, causing the hinge shaft to rotate, either falling off and falling into the working surface, or wearing out the shaft hole. During the lifting process of the crusher, the rotation of the hinge shaft will wear out the inner hole of the traction part shell of the coal mining machine, and the hole will become larger and larger, causing the crusher to shake. In severe cases, the traction part shell may break; or the hinge shaft will fall off, causing the crusher swing arm to fall into the scraper conveyor, resulting in serious production accidents and affecting production safety.

[0004] 2. The existing crusher pipelines are all led out from the traction shell of the coal mining machine, and then enter the crusher shell through the opening on the crusher shell, that is, there is always a section of the crusher pipeline exposed to the outside and cannot be protected. When the crusher is raised or lowered, the exposed pipeline is often worn or squeezed, resulting in leakage or electric leakage, which seriously affects the safe production and reliability of the crusher. Summary of the invention

[0005] The purpose of the present invention is to provide an articulated installation structure for a crusher for a coal mining machine, which significantly improves the reliability of the articulated connection between the crusher and the coal mining machine, eliminates the problems of the existing coal mining machine traction part shell being worn, broken, or falling, and at the same time provides good protection for the crusher pipeline.

[0006] The main technical solutions of the present invention are:

[0007] A hinged installation structure for a coal mining machine crusher, the hinged end of the crusher shell is provided with a swivel hole extending forward and backward, the coal mining machine traction part shell is provided with a laterally extending hinged ear seat, the hinged ear seat and the main part of the coal mining machine traction part shell located in front of it are respectively provided with coaxial rear ear holes and front ear holes, and a countersunk hole is also provided on the rear end surface of the hinged ear seat, the countersunk hole is eccentric with respect to the rear ear hole, the front ear hole is communicated with the wiring cavity inside the coal mining machine traction part, and an intermediate wear-resistant sleeve, a front wear-resistant sleeve and a rear wear-resistant sleeve are respectively tightly fitted and installed in the swivel hole, the front ear hole and the rear ear hole, the hinged end of the crusher shell is embedded between the hinged ear seat and the main part of the traction part shell, the front and rear parts of a pipe fitting are respectively supported in the front wear-resistant sleeve and the rear wear-resistant sleeve, the middle part of the pipe fitting passes through the intermediate wear-resistant sleeve, and the pipe fitting and The wear-resistant sleeves are clearance-fitted with each other, and a radially outwardly protruding ring platform is provided at the rear end of the pipe fitting, which is eccentric relative to the main body of the pipe fitting, and the ring platform is just embedded in and fixed in the countersunk hole. The middle wear-resistant sleeve comprises a front middle wear-resistant sleeve and a rear middle wear-resistant sleeve arranged at intervals in front and back, and the front end of the front middle wear-resistant sleeve and the rear end of the rear middle wear-resistant sleeve are respectively provided with an outer flange, and the two flanges are respectively embedded in the countersunk grooves on the front end face and the rear end face of the hinged end of the crusher shell. A side hole is opened on the side wall of the pipe fitting between the front middle wear-resistant sleeve and the rear middle wear-resistant sleeve, and the side hole is connected with the wiring cavity in the crusher shell. The crusher pipeline is led out from the wiring cavity inside the traction part shell, and enters the wiring cavity in the crusher shell through the inner cavity of the pipe fitting and the side hole in turn, and the crusher shell swings around the main body of the pipe fitting.

[0008] The rear end of the front wear-resistant sleeve is provided with an outer flange, which is embedded in the recessed groove on the rear end surface of the main part of the traction part shell, and the front end of the rear wear-resistant sleeve is provided with an outer flange, which is embedded in the recessed groove on the front end surface of the hinged ear seat.

[0009] The ring platform and the hinged ear seat are preferably positioned by pins and fastened by screws.

[0010] When the crusher shell is in a horizontal overhanging state, the side hole is directly opposite to the opening of the wiring cavity in the crusher shell on the rotary hole.

[0011] The articulated installation structure of the crusher for the coal mining machine also includes a cover plate, which is fixed on the rear end surface of the pipe member to seal the inner cavity of the pipe member from the rear end.

[0012] The beneficial effects of the present invention are:

[0013] The present invention adopts a special structure of hinged connection, which solves the problem that the crusher has serious faults and affects production due to the rotation of the hinge shaft during operation; at the same time, the crusher pipeline can directly pass through the installation structure from the inside of the coal mining machine traction part shell into the crusher shell, and there is no exposed pipeline at all, which avoids the wear and squeeze of the pipeline by coal blocks during the operation of the coal mining machine, realizes the safety protection of the crusher pipeline, and significantly improves the life of the pipeline. Combining the above two aspects, the reliability of the crusher's hinged connection is significantly improved, and a series of problems caused by the reliability problem of the hinged structure are well solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 A schematic structural diagram of an embodiment of the present invention;

[0015] Figure 2 for Figure 1 B-direction view;

[0016] Figure 3 is a structural schematic diagram of an embodiment of the pipe fitting;

[0017] Figure 4 for Figure 3 A-direction view;

[0018] Figure 5 It is a structural schematic diagram of an assembly formed partially of a crusher and a coal mining machine according to the installation structure of the present invention;

[0019] Figure 6 for Figure 5 Top view of the .

[0020] Reference numerals:

[0021] 1. Crusher housing; 1-1. Top of crusher housing; 1-3. Opening; 2. Traction housing; 2-1. Articulated ear seat; 2-2. Main part of traction housing; 3-1. Front middle wear-resistant sleeve; 3-2. Rear middle wear-resistant sleeve; 4. Front wear-resistant sleeve; 5. Rear wear-resistant sleeve; 6. Pipe fittings; 6-1. Ring platform; 6-2. Threaded hole; 7. Cover plate; 8. Crusher pipeline; 9. Pin; 10. Screw; 11. Cylinder; 12. Coal mining machine rocker arm. DETAILED DESCRIPTION

[0022] The present invention discloses a crusher hinged installation structure for a coal mining machine, such as Figure 1-6As shown, the hinged end of the crusher housing 1 is provided with a swivel hole extending forward and backward, and the housing 2 of the traction part of the coal mining machine is provided with a lateral outwardly extending hinged ear seat 2-1, and the hinged ear seat and the main body 2-2 of the traction part housing of the coal mining machine located in front thereof are respectively provided with coaxial rear ear holes and front ear holes, and the rear end surface of the hinged ear seat is also provided with a countersunk hole, which is eccentric relative to the rear ear hole, and the front ear hole is connected to the wiring cavity inside the traction part of the coal mining machine. The middle wear-resistant sleeve, the front wear-resistant sleeve 4 and the rear wear-resistant sleeve 5 are respectively tightly fitted in the swivel hole, the front ear hole and the rear ear hole, and the hinged end of the crusher housing is embedded between the hinged ear seat 2-1 and the main body 2-2 of the traction part housing. The front and rear parts of a pipe fitting 6 are respectively supported in the front wear-resistant sleeve and the rear wear-resistant sleeve, and the middle part of the pipe fitting passes through the middle wear-resistant sleeve, and the pipe fitting and each wear-resistant sleeve are gap-fitted. The rear end of the pipe is provided with a radially outwardly protruding ring platform 6-1, the diameter of the ring platform is D1, and the rest is the main body of the pipe. The ring platform is eccentric to the main body of the pipe, and the eccentricity is L. In the installed state, the ring platform is just embedded and fixed in the countersunk hole, so the pipe can be fixed relative to the traction part shell, so as to prevent the pipe from rotating. The intermediate wear-resistant sleeve includes a front intermediate wear-resistant sleeve 3-1 and a rear intermediate wear-resistant sleeve 3-2 arranged in front and back intervals, and the front end of the front intermediate wear-resistant sleeve and the rear end of the rear intermediate wear-resistant sleeve are respectively provided with an outer flange, and the two flanges are respectively embedded in the countersunk grooves on the front end face and the rear end face of the hinged end of the crusher shell, which are respectively used for the axial limitation of the front intermediate wear-resistant sleeve and the rear intermediate wear-resistant sleeve. A side hole is opened on the side wall of the pipe between the front intermediate wear-resistant sleeve and the rear intermediate wear-resistant sleeve, and the side hole is connected to the wiring cavity in the crusher shell. The crusher pipeline 8 is led out from the wiring cavity inside the traction part housing, and enters the wiring cavity in the crusher housing through the inner cavity and side hole of the pipe fitting in turn, and then connected to the corresponding parts of the crusher, such as the motor in the crusher, without any exposed parts, realizing closed protection of the crusher pipeline, and completely solving the problem of leakage or liquid leakage of the crusher pipeline due to wear or squeezing of coal blocks. The hinged end of the crusher housing and the traction part housing maintain a gap in the front-to-back direction and the circumferential direction, and the crusher housing can swing freely with the main body of the pipe fitting as the center.

[0023] The main body of the pipe is divided into three coaxial sections, and the outer diameters of the three sections decrease from back to front, so as to facilitate the installation of the pipe from the back of the hinged ear seat to the front. The three sections correspond to the rear wear-resistant sleeve, the middle wear-resistant sleeve and the front wear-resistant sleeve from back to front, and match the shaft holes. The outer diameter of the middle section step is D2. The inner cavity of the pipe is the main channel for the crusher pipeline 8, and the diameter is d1.

[0024] The rear end of the front wear-resistant sleeve is provided with an outer flange, which is embedded in the recessed groove on the rear end surface of the main body of the traction part shell, and is used for axial limitation of the front wear-resistant sleeve. The front end of the rear wear-resistant sleeve is provided with an outer flange, which is embedded in the recessed groove on the front end surface of the hinged ear seat, and is used for axial limitation of the rear wear-resistant sleeve.

[0025] The annular platform and the hinged ear seat are positioned by an axial pin 9 and fastened by a screw 10, thereby achieving the fixation between the pipe and the traction part housing. Under the dual action of the pin and the screw, the pipe is reliably fixed. The pipe is always kept still, which can completely solve the wear problem of the ear hole and the breakage problem of the traction part housing.

[0026] When the crusher shell is in a horizontal overhang state, the side hole and the opening of the routing cavity in the crusher shell on the rotary hole are preferably directly opposite, that is, Figure 1 , 2 In the illustrated embodiment, the side hole is opened on the right side of the tube wall of the tube.

[0027] The side hole may be a circular hole with a diameter of d2, and further preferably, its axis extends along the radial direction of the pipe.

[0028] The side hole may also be a strip hole extending in an arc shape, which is long in the circumferential direction and short in the axial direction, and the corresponding central angle in the circumferential direction is within a range of 15 degrees above and below the horizontal line.

[0029] The eccentric direction of the countersunk hole relative to the rear ear hole is opposite to the direction in which the hinged ear seat extends outward relative to the lateral side of the coal mining machine traction part shell. Since the ring platform is just embedded and fixed in the countersunk hole, the ring platform is also eccentric in the same direction relative to the main body of the pipe. Figure 1 , 2 In the embodiment shown, both the counterbore and the annular land are eccentric to the left.

[0030] The articulated installation structure of the crusher for coal mining machine also includes a cover plate 7, which can be fixed to the rear end surface of the pipe by screws to seal the inner cavity of the pipe from the rear end to prevent foreign matter from entering the inner cavity of the pipe.

[0031] The crusher pipeline may include two water pipes, two oil pipes and a high-voltage cable.

[0032] The ring platform may also be provided with a plurality of axially extending through threaded holes 6-2 for assisting in disassembling the pipe fittings. When the pipe fittings need to be disassembled, screws may be screwed into the holes to push the pipe fittings away from the hinged ear seats.

[0033] like Figure 5 , 6As shown, the crusher is connected to the traction housing of the coal mining machine through the mounting structure of the present invention. The oil cylinder 11 is extended and retracted to drive the crusher housing 1 to rise and fall. Since there is no exposed pipeline, the pipeline will no longer be worn or squeezed, and the leakage or leakage can be completely eliminated. At the same time, since both ends of the pipe are supported in the traction box housing, the force is good and stable. In addition, the setting of the eccentric structure of the pipe and the positioning and fastening of the ring platform to the traction housing by pins and screws ensure that the pipe will not loosen or fall off due to large impact loads and frequent vibrations. The wear of the pipe on the traction housing is also eliminated accordingly, and serious production accidents such as local wear and falling of the traction housing are avoided.

[0034] On this basis, an opening 1-3 may also be provided on the top 1-1 of the crusher shell, which can facilitate the operation of laying pipelines in the crusher shell on the one hand, and can also facilitate manual maintenance of pipelines on the other hand.

[0035] The front and rear referred to in this article respectively refer to the directions approaching and moving away from the coal wall when the coal mining machine is in working state.

Claims

1. A hinged installation structure for a crusher for a coal mining machine, characterized in that: The hinged end of the crusher shell is provided with a rotating hole extending forward and backward, and the coal mining machine traction part shell is provided with a laterally extending hinged ear seat, and the hinged ear seat and the main part of the coal mining machine traction part shell located in front of it are respectively provided with coaxial rear ear holes and front ear holes, and a countersunk hole is also provided on the rear end surface of the hinged ear seat, and the countersunk hole is eccentric with respect to the rear ear hole, and the front ear hole is communicated with the wiring cavity inside the coal mining machine traction part, and the middle wear-resistant sleeve, the front wear-resistant sleeve and the rear wear-resistant sleeve are respectively tightly installed in the rotating hole, the front ear hole and the rear ear hole, and the hinged end of the crusher shell is embedded between the hinged ear seat and the main part of the traction part shell, and the front and rear parts of a pipe fitting are respectively supported in the front wear-resistant sleeve and the rear wear-resistant sleeve, and the middle part of the pipe fitting passes through the middle wear-resistant sleeve, and the gap between the pipe fitting and each wear-resistant sleeve In cooperation, the rear end of the pipe fitting is provided with a radially outwardly protruding ring platform, which is eccentric to the main body of the pipe fitting, and the ring platform is just embedded in and fixed in the countersunk hole. The middle wear-resistant sleeve comprises a front middle wear-resistant sleeve and a rear middle wear-resistant sleeve which are arranged at intervals in front and back. The front end of the front middle wear-resistant sleeve and the rear end of the rear middle wear-resistant sleeve are respectively provided with an outer flange, and the two flanges are respectively embedded in the countersunk grooves on the front end face and the rear end face of the hinged end of the crusher shell. A side hole is opened on the side wall of the pipe fitting between the front middle wear-resistant sleeve and the rear middle wear-resistant sleeve, and the side hole is connected with the wiring cavity in the crusher shell. The crusher pipeline is led out from the wiring cavity inside the traction part shell, and enters the wiring cavity in the crusher shell through the inner cavity of the pipe fitting and the side hole in turn. The crusher shell swings around the main body of the pipe fitting.

2. The articulated installation structure of a crusher for a coal mining machine according to claim 1, characterized in that: The rear end of the front wear-resistant sleeve is provided with an outer flange, which is embedded in the recessed groove on the rear end surface of the main part of the traction part shell, and the front end of the rear wear-resistant sleeve is provided with an outer flange, which is embedded in the recessed groove on the front end surface of the hinged ear seat.

3. The articulated installation structure of a crusher for a coal mining machine according to claim 1, characterized in that: The ring platform and the hinged ear seat are positioned by pins and fastened by screws.

4. The articulated installation structure of a crusher for a coal mining machine according to claim 1, characterized in that: When the crusher shell is in a horizontal overhanging state, the side hole is directly opposite to the opening of the wiring cavity in the crusher shell on the rotary hole.

5. The articulated installation structure of a crusher for a coal mining machine according to claim 1, characterized in that: The side hole is a circular hole.

6. The articulated installation structure of a crusher for a coal mining machine as claimed in claim 5, characterized in that: The axis of the side hole extends along the radial direction of the pipe.

7. The articulated installation structure of a crusher for a coal mining machine according to claim 1, characterized in that: The side hole is a strip hole extending in an arc shape, which is long in the circumferential direction and short in the axial direction, and the corresponding central angle in the circumferential direction is within a range of 15 degrees above and below the horizontal line.

8. The articulated installation structure of a crusher for a coal mining machine according to claim 1, 2, 3, 4, 5, 6 or 7, characterized in that: The eccentric direction of the countersunk hole relative to the rear ear hole is opposite to the direction in which the hinged ear seat extends outwardly relative to the lateral side of the housing body of the coal mining machine traction part.

9. The articulated installation structure of a crusher for a coal mining machine according to claim 1, 2, 3, 4, 5, 6 or 7, characterized in that: It also includes a cover plate, which is fixed on the rear end surface of the pipe and seals the inner cavity of the pipe from the rear end.

10. The articulated installation structure of a crusher for a coal mining machine according to claim 8, characterized in that: It also includes a cover plate, which is fixed on the rear end surface of the pipe and seals the inner cavity of the pipe from the rear end.

11. The articulated installation structure of a crusher for a coal mining machine according to claim 9, characterized in that: The ring platform is also provided with a plurality of axially extending through threaded holes.

12. The articulated installation structure of a crusher for a coal mining machine according to claim 10, characterized in that: The ring platform is also provided with a plurality of axially extending through threaded holes.

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