Thin seam short span coal cutter front body part shell

Abstract

The present application relates to a kind of thin coal seam short span coal cutter front body part shell, the lower part of which is respectively provided with a pair of axis front and rear extension and coaxial oil cylinder inner pin hole in left and right ends, the upper part of which is respectively provided with first ear seat, second ear seat and connecting pedestal extending to left and right sides, first ear seat, second ear seat and connecting pedestal are arranged by front and rear interval, front groove is formed between first ear seat and second ear seat, rear groove is formed between second ear seat and connecting pedestal, first ear hole and second ear hole for hinging left and right two rocker arms are respectively provided on left and right two groups of first ear seat and second ear seat, coaxial first circular concave notch, second circular concave notch and third circular concave notch for radial positioning installation cutting motor are respectively provided in the rear part of first ear hole, the front part of second ear hole and the rear part of second ear hole.The present application can provide larger mining range, larger cutting power, also help to shorten body, improve the problem of coal cutter gravity center.

Description

Technical Field

[0001] This invention relates to a partial body structure of a coal mining machine, which is suitable for thin coal seam mining machines. It can be combined with a rocker arm of a specific structure to obtain a larger mining range and improve the center of gravity of the coal mining machine. Background Technology

[0002] The existing thin coal seam mining machines have complex overall structures for the upper suspension body section and rocker arm, which brings with them several problems. For example, the rocker arm is usually equipped with an independent cutting motor, resulting in a long rocker arm. At the same time, the motor cylinder affects the upward swing of the rocker arm, leading to insufficient adaptability to mining height. Another example is the body section between the left and right drums, which has a long longitudinal dimension and heavy weight due to the installation of open hydraulic cylinders, causing the center of gravity of the mining machine to be biased towards the coal face. This leads to problems with operational stability and excessive wear of components such as slippers, seriously affecting the overall performance of the machine.

[0003] In response to the above problems, the industry has proposed to divide the cutting part into a swinging part and a fixed part, and to set the main body of the cutting motor and cutting transmission system in the fixed part. However, this has resulted in an overly complex structure in the fixed part, with the left and right lengths of the overhanging section of the machine body being too long and the weight being too heavy. The problem of the center of gravity of the whole machine still has a significant impact on the stress on the whole machine. Summary of the Invention

[0004] The present invention aims to provide a front main body shell for a thin coal seam short span coal mining machine, which can provide a larger mining range and greater cutting power, and also help to shorten the machine body and improve the center of gravity of the coal mining machine.

[0005] The main technical solutions of this invention are as follows:

[0006] A front main body shell of a thin coal seam short span coal mining machine has a pair of cylinder inner pin holes extending coaxially at both the left and right ends of its lower part. The upper left and right ends of its upper part each have a first ear seat, a second ear seat, and a connecting base extending outward to the left and right. The first ear seat, the second ear seat, and the connecting base are arranged at intervals from front to back. A front groove is formed between the first ear seat and the second ear seat, and a rear groove is formed between the second ear seat and the connecting base. The left and right sets of first ear seats and second ear seats are respectively provided with a first ear hole and a second ear hole for hinged left and right rocker arms. The rear part of the first ear hole, the front part of the second ear hole, and the rear part of the second ear hole are respectively provided with a coaxial first circular recessed stop, a second circular recessed stop, and a third circular recessed stop for radial positioning and installation of the cutting motor.

[0007] The diameter of the first circular recess is preferably larger than the diameters of the second and third circular recesses.

[0008] The bottom surfaces of the front and rear grooves are configured as a first set of concave arc cylindrical surfaces, which are coaxial with the first circular concave stop.

[0009] The overhanging end outer surface of the first lug and the overhanging end outer surface of the second lug are provided as a first group of convex circular arc cylindrical surfaces coaxial with the first circular concave notch.

[0010] The rear groove is a stepped groove, and the groove bottom surface of the rear groove is provided as two sections of concave circular arc cylindrical surfaces with the front section being larger and the rear section being smaller.

[0011] The front main body part shell of the thin seam short span coal mining machine is a multi-chamber thin-walled frame structure.

[0012] The internal spaces of the left and right first lugs are in communication with each other, and a thin-walled box-shaped structure with an open front end is formed at the front part of the front main body part shell, and the first circular concave notch is located on the box bottom plate of the box-shaped structure.

[0013] A cover plate is also installed at the open front end of the box-shaped structure.

[0014] The area between the left and right two front grooves and the area between the left and right two second lugs are provided with a front channel and a hydraulic chamber, the front channel is located above the hydraulic chamber, and the area between the left and right two rear grooves is provided with a rear channel, and the front channel, the rear channel and the hydraulic chamber each form a chamber.

[0015] A positioning pin hole is arranged on the rear end surface of the connecting base.

[0016] The beneficial effects of the present application are:

[0017] The front main body shell of the present application is part of the machine body of the coal mining machine and is used to connect the left and right swing arms. By arranging the first and second lugs and the first to third circular concave notches, the cutting motor is used as the hinge pin shaft to hinge connect the left and right two swing arms, which significantly shortens the left and right lengths of the suspended machine body section of the coal mining machine and the span of the left and right two rollers, which is beneficial to reduce the weight of the suspended machine body section, and ultimately promotes the rear movement of the machine body gravity center, and improves the stability of the whole machine.

[0018] The internal part of the present application is arranged as a compact multi-chamber structure with short dimensions, which greatly reduces the weight of the suspended section of the coal mining machine, and further ensures that the gravity center of the whole machine is close to the goaf side.

[0019] The front main body part shell of the present application can hinge one swing arm on the left and right, and each swing arm corresponds to one cutting motor. When the front main body part shell is used for a coal mining machine, the overall cutting power of the coal mining machine is larger than that of a single motor, and the continuous power consumption of a single motor for cutting hard materials can be reduced during bidirectional mining. Two motors are used for left and right auxiliary power operation, which is beneficial to improve the overall reliability of the cutting mechanism power, especially when cutting hard materials.

[0020] The oil cylinder inner pin hole located at the lower part of the main body part shell near the front end is used to realize the articulation of the height adjusting oil cylinder and the front main body part shell, realizes the arrangement of the height adjusting oil cylinder below the cutting motor, greatly shortens the length of the left and right directions of the suspended body section, narrows the distance between the two rollers for the double drum coal mining machine, and fully utilizes the space between the roof and the floor of the coal mining face.

[0021] The outer convex cylindrical surface and the inner concave cylindrical surface of the overhanging end outer surface of the first and second ear seats and the groove bottom surface of the front and rear grooves are coaxial with the first circular concave notch, so as to match the corresponding articulated ear seat structure surface on the swing arm. As long as the appropriate size of the gap between the pair of surfaces is controlled, the free swing of the swing arm relative to the front main body part shell can be ensured, and the accumulation of coal and rock between the pair of surfaces during the swing process can be prevented to affect the swing angle.

[0022] The box-shaped structure formed by the left and right internal spaces of the two first ear seats not only can be used as a motor wiring installation cavity, but also can be used as a filter, valve group, pipeline installation and connection cavity. Moreover, the sealing effect of the cover plate provides a clean working environment for the motor and pipeline. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 The front view of an embodiment of the present application;

[0024] Figure 2 The top view of the cross-sectional view of Figure 1 .

[0025] REFERENCE NUMERALS:

[0026] 21. The front main body part shell; 211. The first ear seat; 2111. The first circular concave notch; 2112. The inner cavity of the box-shaped structure; 2113. The cover plate; 2115. The overhanging end outer surface of the first ear seat; 2121. The front groove; 213. The second ear seat; 2131. The second circular concave notch; 2132. The third circular concave notch; 2133. The overhanging end outer surface of the second ear seat; 2141. The larger diameter groove; 2142. The smaller diameter groove; 215. The connecting base; 2151. The rear end surface; 2152. The positioning pin hole; 2153. The bolt hole; 216. The hydraulic cavity; 2161. The filter mounting hole; 2171. The front passage; 2172. The rear passage; 218. The oil cylinder inner pin hole. DETAILED DESCRIPTION

[0027] The present application discloses a front main body part shell 21 (which can be simply referred to as a front main body part shell) of a short-span coal mining machine for thin coal seams, as shown in Figure 1 , 2As shown, the lower left and right ends of the lower part of the swing arm are each provided with a pair of oil cylinder inner pin holes 218 extending coaxially in the front-rear direction, and the upper left and right ends of the upper part of the swing arm are each provided with a first ear seat 211, a second ear seat 213 and a connecting base 215 extending to the left and right sides, and the first ear seat, the second ear seat and the connecting base are arranged in front-to-back intervals. The front recess 2121 is formed between the first ear seat and the second ear seat, and the rear recess is formed between the second ear seat and the connecting base. The first ear hole and the second ear hole for articulating the left and right swing arms are respectively provided on the left and right groups of first ear seats and second ear seats, and the rear part of the first ear hole, the front part of the second ear hole and the rear part of the second ear hole are respectively provided with coaxial first, second and third circular recessed notches 2111, 2131 and 2132 for radially positioning and installing the cutting motor. The purpose of arranging the first, second ear seats and the first to third circular recessed notches is to articulate the left and right swing arms, and to use the cutting motor as the articulation pin shaft, which can significantly shorten the left and right lengths of the front body part shell, which is equivalent to shortening the left and right lengths of the suspension body section of the coal mining machine, which is beneficial to reducing the weight of the suspension body section, and ultimately promotes the rear movement of the body weight center, and improves the stability of the whole machine.

[0028] The oil cylinder inner pin hole is preferably arranged near the front end. The oil cylinder inner pin hole and the oil cylinder outer pin hole arranged on the swing arm shell are left-right opposite. The oil cylinder inner pin hole and the oil cylinder outer pin hole are respectively used for articulating the inner end and the outer end of the height adjustment oil cylinder. The height adjustment oil cylinder is extended and retracted to drive the swing arm to swing up and down around the front body part shell.

[0029] The diameter of the first circular recessed notch is preferably greater than the diameters of the second circular recessed notch and the third circular recessed notch, which can facilitate the installation of the cutting motor.

[0030] Among them, the first circular recessed notch and the second circular recessed notch play a main supporting role for the cutting motor, and the third circular recessed notch plays an auxiliary supporting role for the cutting motor.

[0031] The bottom surfaces of the front recess and the rear recess are arranged as a first group of concave circular cylindrical surfaces (which includes a plurality of concave circular cylindrical surfaces), and the first group of concave circular cylindrical surfaces are coaxial with the first circular recessed notch. The front recess and the rear recess are respectively used for accommodating the front arm of the swing arm shell and the high-speed end of the boom. The front recess and the front arm, and the rear recess and the high-speed end of the boom maintain a suitable gap, which not only ensures the free swing of the swing arm relative to the front body part shell, but also prevents coal and rock from entering between the swing arm and the front body part to cause jamming.

[0032] The overhanging end outer surface 2115 of the first lug and the overhanging end outer surface 2133 of the second lug are arranged as a first set of convex circular-arc cylindrical surfaces (containing multiple convex circular-arc cylindrical surfaces), which are coaxial with the first circular recess. The overhanging end outer surfaces of the first and second lugs are coaxial with and equally spaced from the corresponding surfaces on the swing arm. As long as the spacing is appropriate, on the one hand, the swing arm can freely swing relative to the front main body housing, and on the other hand, coal and rock can be prevented from entering between the swing arm and the front main body to cause jamming.

[0033] In the embodiment shown in the drawings, the rear groove is a stepped groove, and the groove bottom surface is arranged as two segments of concave circular-arc cylindrical surfaces with the front segment being larger and the rear segment being smaller. The larger-diameter segment 2141 is used to accommodate the front part of the high-speed end of the boom, and the smaller-diameter segment 2142 is used to accommodate the rear part of the high-speed end of the boom. Correspondingly, the outer surface of the high-speed end of the boom is also arranged as a stepped shape.

[0034] The front main body housing is preferably a multi-chamber thin-walled frame structure, thereby reducing its own weight and helping to further move the center of gravity of the shearer body rearward.

[0035] The internal spaces of the left and right first lugs are connected left and right, forming a thin-walled box-shaped structure with an open front end at the front part of the front main body housing, and the first circular recess is located on the bottom plate of the box-shaped structure. After the left and right swing arms are installed and connected, the front parts of the left and right cutting motors are located in the internal cavity 2112 of the box-shaped structure.

[0036] The front end of the box-shaped structure is preferably provided with a cover plate 2113 to close the internal cavity of the box-shaped structure, so that the space where the cutting motor is located remains clean.

[0037] The area between the left and right front grooves and the area between the left and right second lugs are provided with a front passage 2171 and a hydraulic chamber 216, the front passage being located above the hydraulic chamber, and the area between the left and right rear grooves is provided with a rear passage 2172. The front passage, the rear passage, and the hydraulic chamber each form a chamber. The hydraulic chamber forms a self-closed chamber containing hydraulic oil and is also provided with a filter, and 2161 is a filter mounting hole. The front passage and the rear passage are connected, and these two passages mainly serve as the layout passages for motor cables, solenoid valve small cables, water pipes, hydraulic chamber oil pipes, etc. The front passage is connected to the internal cavity 2112 of the box-shaped structure, and the rear passage penetrates through the front main body housing rearward.

[0038] The rear end surface of the connecting base is provided with a left and right positioning pin hole 2152. The rear end surface 2151 of the connecting base and the positioning pin hole are positioning structures when the front main body housing and the rear main body housing are fixedly connected together. The front and rear main body housings are fastened by bolts passing through the bolt holes 2153.

[0039] Unless specifically stated otherwise, as used herein, the terms "forward" and "rearward" refer to the direction toward and away from the coal face, respectively.

Claims

1. A front main body shell of a thin coal seam short span coal mining machine, characterized in that: The lower part has a pair of coaxial cylinder inner pin holes extending front and back at both ends. The upper part has a first ear seat, a second ear seat, and a connecting base extending outwards to the left and right at both ends. The first ear seat, the second ear seat, and the connecting base are arranged at intervals from front to back. A front groove is formed between the first ear seat and the second ear seat, and a rear groove is formed between the second ear seat and the connecting base. The left and right sets of first ear seats and second ear seats are respectively provided with first ear holes and second ear holes for hinged left and right swing arms. The rear part of the first ear hole, the front part of the second ear hole, and the rear part of the second ear hole are respectively provided with a coaxial first circular recess, a second circular recess, and a third circular recess for radial positioning and mounting of the cutting motor. The cutting motor is used as a hinge pin for hinged between the swing arm and the front main body housing. The front main body housing is a multi-chamber thin-walled frame structure. A front channel and a hydraulic chamber are provided in the area between the two front grooves and the two second ear seats. The front channel is located above the hydraulic chamber. A rear channel is provided in the area between the two rear grooves. The front channel, the rear channel, and the hydraulic chamber each form a chamber.

2. The front main body shell of the thin coal seam short span coal mining machine as described in claim 1, characterized in that: The diameter of the first circular recess is larger than the diameters of the second and third circular recesses.

3. The front main body shell of the thin coal seam short span coal mining machine as described in claim 2, characterized in that: The bottom surfaces of the front and rear grooves are configured as a first set of concave arc cylindrical surfaces, which are coaxial with the first circular concave stop.

4. The front main body shell of the thin coal seam short span coal mining machine as described in claim 3, characterized in that: The outer surface of the overhanging end of the first ear seat and the outer surface of the overhanging end of the second ear seat are configured as a first set of convex circular arc cylindrical surfaces, and the first set of convex circular arc cylindrical surfaces are coaxial with the first circular concave stop.

5. The front main body shell of the thin coal seam short span coal mining machine as described in claim 4, characterized in that: The rear groove is a stepped groove, and the bottom surface of the rear groove is set as two concave arc cylindrical surfaces, one larger in the front and one smaller in the back.

6. The front main body shell of the thin coal seam short span coal mining machine as described in claims 1, 2, 3, 4 or 5, characterized in that: The internal spaces of the two first ear seats are connected from left to right, forming a thin-walled box-shaped structure with an open front end at the front of the front main body housing. The first circular recessed stop is located on the bottom plate of the box-shaped structure. After the left and right swing arms are installed and connected, the front of the left and right cutting motors are both located in the inner cavity of the box-shaped structure.

7. The front main body shell of the thin coal seam short span coal mining machine as described in claim 6, characterized in that: The front opening of the box-shaped structure is fitted with a cover plate.

8. The front main body shell of the thin coal seam short span coal mining machine as described in claim 1, characterized in that: The connecting base has a positioning pin hole on each of the left and right sides of its rear end face.

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