Crushing mechanism and mounting structure of thin seam compact coal mining machine

Abstract

The present application relates to a kind of thin coal seam compact type coal cutter's breaking mechanism and its installation structure, the breaking mechanism includes the breaking torque shaft of transmission connection in turn, front stage transmission gear set, intermediate transmission gear set, rear stage transmission gear set and breaking drum shaft, multiple cutterheads are fixed with in parallel around and are equipped with on breaking drum shaft, the power of breaking torque shaft comes from cutting motor;The installation structure includes machine body and breaking mechanism, breaking mechanism is installed in the shell in the rear of machine body, wherein front stage transmission gear set, intermediate transmission gear set and rear stage transmission gear set are extended and set in left and right and are arranged in the rear, breaking torque shaft and breaking drum shaft extend across the shell in the rear of coal cutter machine body, the bottom surface of shell at corresponding position of machine body when the cutting tip of cutterhead rotates to the lowest point is lower than machine body.This application solves the problem of breaking large coal rock of thin coal seam coal cutter, prevent large coal rock from being stuck into the space between machine body and conveying groove and cause coal cutter traction to be stuck.

Description

TECHNICAL FIELD

[0001] The present application relates to a kind of coal cutter breaking mechanism and the installation structure of the breaking mechanism on coal cutter, can be applied to thin coal seam coal cutter. BACKGROUND

[0002] Suspension machine body thin coal seam coal cutter usually adopts inner rotation of drum to load to outside, and the effective loading blade area of drum is smaller, and loading effect is poor;At the same time, the mode of throwing to outside is also easy to cause large coal rock to enter the conveyor, and in the limited height space between the bottom surface of machine body shell and the conveyor, large coal rock is easy to be stuck and cannot pass through. At present, thin coal seam coal cutter does not set breaking mechanism due to the reason of space limitation. SUMMARY

[0003] The present application aims to provide a kind of breaking mechanism of thin coal seam compact coal cutter and its installation structure, can be applied to thin coal seam coal cutter, solve the breaking problem of large coal rock of thin coal seam coal cutter, prevent large coal rock from being stuck in the space between machine body and conveying groove and cause coal cutter to be stuck.

[0004] The main technical scheme of the present application is as follows:

[0005] A kind of breaking mechanism of thin coal seam compact coal cutter, including breaking torque shaft, front stage transmission gear set, intermediate transmission gear set, rear stage transmission gear set and breaking drum shaft connected in sequence, and a plurality of cutterheads are fixed in parallel and circumferentially on the breaking drum shaft, the front end of breaking torque shaft is its power input end, the rear end of breaking torque shaft is coaxially spline-coupled with the input end gear of front stage transmission gear set, and the rear end of breaking drum shaft is coaxially spline-coupled with the output end gear of rear stage transmission gear set.

[0006] The cutterhead can include cutter teeth and cutterhead sleeve, the cutterhead sleeve is sleeved on the breaking drum shaft and is fixed angularly by means of a flat key, and a plurality of cutter teeth are fixed and installed on the cutterhead sleeve in a circumferential direction.

[0007] Each cutter tooth preferably adopts a combined cutter with a plurality of cutter tips.

[0008] The front stage transmission gear set, the intermediate transmission gear set and the rear stage transmission gear set are all fixed shaft gear reduction mechanisms.

[0009] A kind of breaking mechanism installation structure of thin coal seam compact coal cutter, including coal cutter machine body and the breaking mechanism of thin coal seam compact coal cutter, the breaking mechanism of thin coal seam compact coal cutter is installed in the shell in the rear of coal cutter machine body, wherein front stage transmission gear set, intermediate transmission gear set and rear stage transmission gear set are arranged in left and right extension in rear, breaking torque shaft and breaking drum shaft extend front and back and span the shell in the rear of coal cutter machine body, and the cutter tip of cutterhead is rotated to the lowest point, which is lower than the bottom surface of shell at the corresponding position in the rear of coal cutter machine body.

[0010] The front side of the shell of the rear part of the fuselage can be further provided with a support plate, the support plate is provided with a front bearing, the shell of the rear part of the fuselage is provided with a rear bearing, and the front and rear ends of the crushing roller shaft are supported on the front and rear bearings respectively.

[0011] The left part and / or the right part of the shell of the rear part of the fuselage is provided with the crushing mechanism of the thin seam compact coal mining machine, and when the left part and the right part are both provided with the crushing mechanism of the thin seam compact coal mining machine, the two sets of crushing mechanisms of the thin seam compact coal mining machine are arranged in a left-right symmetrical manner.

[0012] The middle part of the bottom surface of the shell of the rear part of the fuselage in the front-rear direction is provided with a left-right extending longitudinal groove, and the front-stage transmission gear set, the intermediate transmission gear set and the rear-stage transmission gear set are all installed above the rear of the longitudinal groove.

[0013] The coal mining machine fuselage is of a split structure, comprising a front main body part shell and a rear main body part shell, the front main body part shell and the rear main body part shell are connected and fixed in front of and behind each other, and are positioned through two left and right positioning pins, and the crushing mechanism of the thin seam compact coal mining machine is installed in the rear main body part shell.

[0014] The cutting motor and the front-stage cutting transmission mechanism are installed in the front main body part shell, the output shaft of the cutting motor is coaxially and transmissionally connected with the input end gear of the front-stage cutting transmission mechanism, and the front end of the crushing torque shaft is coaxially and transmissionally connected with the output end gear of the front-stage cutting transmission mechanism.

[0015] The rear main body part shell comprises a rear base body and a first ear seat which is suspended leftward and rightward in the middle part of the rear base body in the front direction, a rear groove is formed between the first ear seat and the rear base body, the first ear seat and the rear base body are provided with a first ear hole and a second ear hole which are coaxial with each other in the middle of the left and right sides and the front section of the rear base body respectively, the front end surface of the first ear seat is provided with two left and right positioning pin holes, the two left and right positioning pins are tightly and fittedly installed in the two left and right positioning pin holes respectively, the positioning pins are hollow positioning pins, and the front end of the crushing torque shaft is coaxially and spline-coupled with the output end gear of the front-stage cutting transmission mechanism through the second ear hole, the rear groove, the first ear hole and the central through hole on the positioning pin in sequence.

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

[0017] The crushing mechanism of the present application can crush oversized coal gangue, rock blocks and the like, prevent them from being clamped into the conveying channel between the fuselage and the conveying groove, and solve the problems of hard pulling and broken chain of the conveyor scraper and the problems of traction and clamping of the coal mining machine.

[0018] The crushing mechanism obtains power from the cutting motor, thus no additional independent power is needed, only a transmission mechanism is reserved, thus the structure is simple, the installation space is greatly saved, the problem that the coal passing space below the thin seam coal mining machine body and above the conveying groove is limited can be well overcome, and the crushing mechanism can be installed on the thin seam coal mining machine.

[0019] Since the span between the front and rear power connection points of the crushing torque shaft is large, the crushing torque shaft has sufficient flexibility, and thus has good adaptability to the machining and assembly errors of related structures.

[0020] The front-stage transmission gear set, the intermediate transmission gear set and the rear-stage transmission gear set are all installed above the rear upper part of the longitudinal groove in the housing at the rear part of the machine body, the solid internal space gradually thickening at the rear part of the longitudinal groove is fully utilized, and the occupation of the conveying channel above the conveying groove is avoided.

[0021] The support plate is convenient to disassemble and assemble, after the support plate is disassembled, the broken cutter or the corresponding cutter head can be conveniently replaced, and maintenance is simple.

[0022] The crushing roller with multiple cutters and multiple cutter heads is adopted in the application, through less reduction, the crushing roller shaft has high rotating speed, and milling type crushing is performed at high speed, small amount and medium force. The crushing mode with less cutting amount and multiple cutting times breaks through the traditional crushing concept, the crushing effect can be greatly improved, the probability that the rock is not crushed in time is reduced, and the crushing of large coal and gangue blocks in high-speed traction state is more suitable. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 FIG. 1 is a schematic view of the installation structure of the crushing mechanism (left and right double-sided installation) of the application;

[0024] Figure 2 FIG. 2 is an enlarged view of the crushing mechanism in FIG. 1; Figure 1

[0025] Figure 3 FIG. 3 is a partial enlarged view of the crushing roller in FIG. 1; Figure 2

[0026] Figure 4 FIG. 4 is an end surface schematic view of one embodiment of the cutter head;

[0027] Figure 5 FIG. 5 is a side view of the installation structure of the crushing mechanism;

[0028] Figure 6 FIG. 6 is a schematic view of the installation structure of the crushing mechanism (left single-sided installation) of the application.

[0029] Reference signs:

[0030] ​​2. Front main body; 21. Front main body housing; 22. Cutting motor; 23. Clutch mechanism; 24. Input end gear; 25. Output end gear; 252. Spline hole; 29. ​​Positioning pin;

[0031] 3. Rear main body; 31. Rear main body housing; 311. First lug; 312. Rear groove; 313. Loading cavity; 319. Bottom surface of longitudinal groove; 32. Crushing mechanism; 321. Crushing torque shaft; 3211. External spline; 3212. External spline; 3213. Thin shaft diameter section; 322. Crushing drum; 3221. Support plate; 3222. Front bearing; 3223. Rear bearing; 3224. Crushing drum shaft; 3225. Cutter disc; 32251. Cutter teeth; 32252. Cutter disc sleeve; 32253. Keyway; 32255. Cutter tip; 3226. Flat key; 3231. Front transmission gear set; 3232. Intermediate transmission gear set; 3233. Rear transmission gear set;

[0032] 6. Support the sliding boots;

[0033] 9. Conveyor; 91. Shovel plate; 95. Conveying trough. Detailed Implementation

[0034] This invention discloses a crushing mechanism 32 (which may be simply referred to as the crushing mechanism) for a compact coal mining machine for thin coal seams, such as... Figures 1-6 As shown, the system includes a crushing torque shaft 321, a front-stage transmission gear set 3231, an intermediate transmission gear set 3232, a rear-stage transmission gear set 3233, and a crushing drum shaft 3224, all connected in sequence. The cutter discs are positioned circumferentially by a flat key 3226. Multiple cutter discs 3225 are arranged side-by-side and circumferentially fixed on the crushing drum shaft, forming a crushing drum 322 for crushing large pieces of coal and rock. The front end of the crushing torque shaft is its power input end, and it is equipped with an external spline 3211. The rear end of the crushing torque shaft is equipped with an external spline 3212, which is coaxially splinedly connected to the input gear of the front-stage transmission gear set. The external spline 3212 transitions to the rest of the crushing torque shaft via a thin shaft diameter section 3213. The rear end of the crushing drum shaft is also equipped with an external spline, and it is inserted into the core spline hole of the output gear of the rear-stage transmission gear set and coaxially splinedly connected to it. The crushing power is input from the front end of the crushing torque shaft, and then transmitted to the front transmission gear set, intermediate transmission gear set, and rear transmission gear set at the rear end of the crushing torque shaft. Finally, it drives the crushing drum shaft and the cutter head on it to rotate on the fixed shaft, crushing large pieces of coal and rock.

[0035] The cutter head 3225 comprises cutter teeth 32251 and a cutter head sleeve 32252, the inner hole of the cutter head sleeve is provided with a key groove 32253, the cutter head sleeve is sleeved on the crushing roller shaft and is fixed by a flat key in the angular direction. A plurality of cutter teeth are fixedly installed on the cutter head sleeve in the circumferential direction, and the cutter teeth and the cutter head sleeve can be fixed by welding or detachable fixing by fasteners.

[0036] Each cutter tooth preferably adopts a combined cutter with a plurality of cutter tips 32255. The plurality of cutter teeth are preferably uniformly distributed along the circumference on the cutter head sleeve.

[0037] The crushing roller mechanism of the present application adopts a plurality of cutter teeth and a plurality of cutter head groups, and a higher rotating speed of the crushing roller shaft can be achieved by less speed reduction, so as to perform milling type crushing of rocks. This crushing mode with less cutting amount and more cutting times can greatly improve the crushing effect and reduce the probability of rocks not being crushed in time, and is more suitable for crushing of large coal gangue blocks in a high-speed traction state.

[0038] The front-stage transmission gear set, the intermediate transmission gear set and the rear-stage transmission gear set are all fixed shaft gear reduction mechanisms. In the embodiment, the front-stage transmission gear set, the intermediate transmission gear set and the rear-stage transmission gear set constitute a three-stage reduction mechanism.

[0039] The present application also discloses a thin coal seam compact type coal mining machine crushing mechanism installation structure, which comprises a coal mining machine body and a crushing mechanism 32 of the thin coal seam compact type coal mining machine, the crushing mechanism of the thin coal seam compact type coal mining machine is installed in a shell at the rear of the coal mining machine body, wherein the front-stage transmission gear set, the intermediate transmission gear set and the rear-stage transmission gear set are arranged in the left and right directions and are arranged at the rear side. The crushing torque shaft and the crushing roller shaft extend in the front and rear directions and cross the shell at the rear of the coal mining machine body. When the cutter tip of the cutter head rotates to the lowest point, the height of the cutter tip is lower than the bottom surface of the shell at the corresponding position at the rear of the coal mining machine body, so that effective crushing can be ensured. Referring to the right part of Figure 6 The installation of the crushing mechanism can be realized by arranging corresponding holes or cavities in the shell at the rear of the coal mining machine body, and the installation structure is simple.

[0040] Since the distance between the power connection points at the front and rear ends of the crushing torque shaft is large, the crushing torque shaft has sufficient flexibility, and thus has good adaptability to the machining and assembly errors of related structures.

[0041] The crushing roller shaft of the crushing mechanism is preferably arranged at the left end or the right end of the shell at the rear of the coal mining machine body in the left and right directions. When the roller in front of the walking direction of the coal mining machine throws the large coal rock outward to the conveyor 9, the crushing mechanism on the same side as the roller will first contact the coal rock and crush it, so as to prevent the large coal rock from being stuck between the coal mining machine body and the conveying groove 95 and hindering the walking of the coal mining machine, solve the problems of hard pulling of the conveyor scraper and broken crushing chain and the problem of coal mining machine traction jamming.

[0042] A support plate 3221 is also installed on the front side of the rear housing of the machine. A front bearing 3222 is installed inside the support plate, and a rear bearing 3223 is installed inside the rear housing of the machine. The front and rear ends of the crushing drum shaft are supported on the front and rear bearings, respectively. After removing the support plate, the crushing teeth or corresponding cutter disc can be easily replaced. The assembly and disassembly are convenient, and the maintenance is simple.

[0043] A support slipper 6 is also installed in front of the support plate. The support slipper is fixedly connected to the shell at the rear of the machine, and the bottom surface of the support slipper is supported on the conveyor's shovel plate 91. The support slipper is located behind the drum, preferably directly behind it. The installation of the support slipper can reduce the flow of coal from the outside of the drum's centerline to the inside, thereby guiding more coal flow from the outer loading channel outside the drum's centerline into the conveyor, allowing the crushing mechanism to crush more large pieces of coal.

[0044] A loading cavity 313 can also be provided on the rear shell of the machine. The loading cavity is a groove extending from front to back with the opening facing downwards. The loading cavity is not a through groove, and its rear end is closed. The front end of the loading cavity in the left-right direction is located inside the center line of the drum. The crushing mechanism surrounds the loading cavity on the same left and right sides. The opening of the loading cavity is located above the conveying trough. The setting of the loading cavity is equivalent to adding an internal loading channel, which can guide the coal flow entering the inner side of the drum center line into the conveying trough of the conveyor, thereby further improving the coal loading effect.

[0045] A crushing mechanism of the thin coal seam compact coal mining machine is installed on the left or right side of the rear housing of the machine body, usually close to the tail side of the conveyor. When encountering special coal conveying processes, a crushing mechanism of the thin coal seam compact coal mining machine can be installed on the left and right sides of the rear housing of the machine body, and the two crushing mechanisms of the thin coal seam compact coal mining machine are arranged symmetrically from left to right.

[0046] A longitudinal groove extending laterally is provided in the center of the bottom surface of the rear housing of the machine body, and the longitudinal groove is directly opposite the conveying trough 95 of the conveyor 9 located below the rear housing of the machine body. The front-stage transmission gear set, intermediate transmission gear set, and rear-stage transmission gear set are all installed above and behind the longitudinal groove, making full use of the gradually thickening solid internal space behind the longitudinal groove in the rear housing of the machine body, and avoiding the occupation of the conveying channel above the conveying trough. In the case where the longitudinal groove is provided, the horizontal height of the cutter tip when it rotates to the lowest point should be lower than the bottom surface 319 of the longitudinal groove.

[0047] Further, the machine body is preferably of split structure, comprising a front body shell 21 of the front body part 2 and a rear body shell 31 of the rear body part 3, the front body shell and the rear body shell being butted and fixed in front and back, and being positioned by two left and right positioning pins 29. The front body shell and the rear body shell form a T-shaped machine body with the front narrow and the rear wide. The crushing mechanism of the thin seam compact coal mining machine is installed in the rear body shell.

[0048] The front body shell is provided with a cutting motor 22 and a front-stage cutting transmission mechanism. The output shaft of the cutting motor is coaxially connected with an input end gear 24 of the front-stage cutting transmission mechanism, for example, by a core shaft of a clutch mechanism 23 and a spline connection with the input end gear. The front end of the crushing torque shaft is coaxially connected with an output end gear 25 of the front-stage cutting transmission mechanism. The power is stably transmitted from the cutting motor to the crushing mechanism, so that the crushing mechanism does not need to be additionally provided with an independent power source, and only part of the power of the cutting motor can realize the power input of the crushing mechanism, which is beneficial to simplify the structure of the crushing mechanism and save the installation space.

[0049] The rear body shell preferably comprises a rear base body and a first ear seat 311 which is suspended forwardly and leftwardly in the middle of the rear base body, and a rear groove 312 is formed between the first ear seat and the rear base body. The first ear seat and the front section of the rear base body are respectively provided with a first ear hole and a second ear hole which are coaxial with each other. The first ear hole and the second ear hole are used for the hinging of the rocker arms of the coal mining machine with the rear body shell. In the installed state, the left and right rocker arms are respectively located in front of the left and right parts of the rear base body.

[0050] The front end face of the first ear seat is provided with two left and right positioning pin holes, and the two left and right positioning pins are respectively tightly fitted and installed in the two left and right positioning pin holes. The front end face of the first ear seat is attached to the front body shell. The positioning pins are hollow positioning pins, and the front end of the crushing torque shaft is coaxially spline-connected with a spline hole 252 in the rear part of the output end gear 25 of the front-stage cutting transmission mechanism through the second ear hole, the rear groove, the first ear hole and the central through hole of the positioning pin in sequence.

[0051] Unless otherwise specified, the front and the rear in this article respectively refer to the direction close to the coal wall and the direction away from the coal wall.

Claims

1. A thin seam compact miner crushing mechanism mounting structure, characterized by: The crushing mechanism of the thin seam compact coal mining machine is installed in the shell at the rear part of the coal mining machine body, wherein the front stage transmission gear set, the intermediate transmission gear set and the rear stage transmission gear set are arranged in the left and right directions and are arranged at the rear part, the crushing torque shaft and the crushing roller shaft are arranged in the front and rear directions and cross the shell at the rear part of the coal mining machine body, the cutting edge of the cutter head is arranged at the lowest point below the bottom surface of the shell at the corresponding position of the rear part of the coal mining machine body, the middle part of the bottom surface of the shell at the rear part of the coal mining machine body in the front and rear directions is provided with the left and right extending longitudinal grooves, and the front stage transmission gear set, the intermediate transmission gear set and the rear stage transmission gear set are all installed above the rear part of the longitudinal grooves.

2. The thin-seam compact miner breaker mechanism mounting structure as claimed in claim 1, characterized by: The front side of the shell at the rear part of the coal mining machine body is also provided with the support plate, the front bearing is arranged in the support plate, the rear bearing is arranged in the shell at the rear part of the coal mining machine body, and the front and rear ends of the crushing roller shaft are supported on the front and rear bearings respectively.

3. The thin-seam compact miner breaker mechanism mounting structure of claim 2, wherein: The left part and / or the right part of the shell at the rear part of the coal mining machine body is provided with the crushing mechanism of the thin seam compact coal mining machine, and when the left part and the right part are both provided with the crushing mechanism of the thin seam compact coal mining machine, the two sets of crushing mechanisms of the thin seam compact coal mining machine are arranged in the left and right directions symmetrically.

4. The thin-seam compact miner breaker mechanism mounting structure of claim 1, 2, or 3, wherein: The coal mining machine body is of a split structure and comprises a front main body shell and a rear main body shell, the front main body shell and the rear main body shell are connected and fixed in front of and behind each other, the front main body shell and the rear main body shell are positioned by the two positioning pins in the left and right directions, and the crushing mechanism of the thin seam compact coal mining machine is installed in the rear main body shell.

5. The thin-seam compact miner breakermounting structure as claimed in claim 4, characterized in that: The cutting motor and the front stage cutting transmission mechanism are installed in the front main body shell, the output shaft of the cutting motor is coaxially and drivingly connected with the input end gear of the front stage cutting transmission mechanism, and the front end of the crushing torque shaft is coaxially and drivingly connected with the output end gear of the front stage cutting transmission mechanism.

6. The thin-seam compact miner breakermounting structure as claimed in claim 5, characterized in that: The rear main body shell comprises a rear base and a first ear seat which is suspended in the left and right directions and protrudes forward from the middle part of the rear base, the first ear seat and the rear base form a rear groove, the first ear hole and the second ear hole which are coaxial with each other are arranged in the first ear seat and the front section of the rear base respectively, the front end face of the first ear seat is provided with two positioning pin holes in the left and right directions, the two positioning pins are tightly fitted and installed in the two positioning pin holes respectively, the positioning pins are hollow positioning pins, and the front end of the crushing torque shaft is coaxially and spline-coupled with the output end gear of the front stage cutting transmission mechanism by sequentially penetrating the second ear hole, the rear groove, the first ear hole and the central through hole of the positioning pin.

7. The thin-seam compact miner breaker house mounting structure of claims 1, 2, or 3, wherein: The cutter head comprises cutter teeth and a cutter head sleeve, the cutter head sleeve is sleeved on the crushing roller shaft and is fixed in the angular direction by means of a flat key, and a plurality of cutter teeth are fixed and installed on the cutter head sleeve in the circumferential direction.

8. The thin-seam compact miner breaker house mounting structure as claimed in claim 7, characterized by: Each cutter tooth is a combined cutter with a plurality of cutting edges.

9. The thin-seam compact miner breaker house mounting structure of claims 1, 2, or 3, wherein: The front-stage transmission gear set, the intermediate transmission gear set and the rear-stage transmission gear set are all fixed shaft gear reduction mechanisms. The front-stage transmission gear set, the intermediate transmission gear set and the rear-stage transmission gear set are all fixed shaft gear reduction mechanisms.

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