Thin seam compact type coal cutter rear main body

Abstract

The present application relates to a kind of thin coal seam compact type coal winning machine rear body part, including left and right extension strip-shaped rear body part shell, rear body part shell includes rear base and the third lug seat of left and right overhanging in rear base middle part front direction, the front end surface of third lug seat is large plane, and large plane is equipped with left and right two positioning pin holes, and the front section of left and right two third lug seat and rear base is respectively equipped with coaxial third lug hole and fourth lug hole, the bottom surface of left and right of rear base is respectively equipped with left and right two loading cavity, loading cavity is by front to rear extension, groove mouth downward groove, loading cavity front end is open rear end closed, rear base is further equipped with left and right two crushing mechanism installation cavity, wherein crushing mechanism is installed, and large coal rock between the rear base and the conveying groove is broken into pieces.The present application can improve loading effect, reduce the occurrence of large coal rock between the rear of machine body and conveyor, can improve the problem of coal winning machine gravity center, improve the stability of whole machine.

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] Existing thin-seam coal mining machines with suspended bodies typically load from the inside out with rotating drums. The effective loading blade area on the drums is small, resulting in poor loading efficiency. At the same time, the outward throwing method can easily cause large pieces of coal and rock to get stuck in the limited height space between the rear of the coal mining machine and the conveyor when they enter the conveyor, affecting the passage of the coal mining machine.

[0003] In addition, the existing thin coal seam mining machines often have complex structures and large dimensions in the left and right directions due to the design of the cutting transmission system. The weight of the suspended body is also relatively heavy, causing the center of gravity of the mining machine to be biased towards the coal wall side. This results in poor operating stability and excessive wear of parts such as slippers, which seriously affects the overall performance of the machine. Summary of the Invention

[0004] The present invention aims to provide a compact rear body of a coal mining machine for thin coal seams, which can improve loading efficiency, reduce the jamming of large coal and rock pieces between the rear of the machine and the conveyor, improve the center of gravity of the coal mining machine, and improve the overall performance of the coal mining machine.

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

[0006] A rear main body of a compact coal seam mining machine includes a rear main body shell extending horizontally in a strip shape. The rear main body shell includes a rear base and a third lug that extends horizontally and horizontally from the front of the rear base. A rear groove is formed between the third lug and the rear base. The front end face of the third lug is a large flat surface, and two positioning pin holes are provided on the large flat surface. The two third lugs and the front section of the rear base are respectively provided with a third ear hole and a fourth ear hole on the left and right sides. The bottom surfaces of the left and right sides of the rear base are respectively provided with two loading cavities. The loading cavity is a groove extending from front to back with the opening facing downward. The front end of the loading cavity is open and the rear end is closed.

[0007] The top surface of the loading cavity can be divided into two sections: the front section is a horizontal plane, and the rear section is a sloping plane that is higher in the front and lower in the rear.

[0008] The bottom surface of the rear groove is configured as an inwardly concave arc cylindrical surface coaxial with the third ear hole, and the outer surface of the overhanging end of the third ear seat is configured as an outwardly convex arc cylindrical surface coaxial with the third ear hole.

[0009] The middle position of the rear base in the left-right direction is provided with two electrical cavities, and a wire channel extending in the front-rear direction is arranged between the two electrical cavities. An operation cavity is arranged in front of the two electrical cavities and the wire channel, and the operation cavity is located between the two third ear seats and the two rear grooves. The wire channel is in communication with the operation cavity. The rear base is in a solid structure except for the loading cavity, the electrical cavity and the wire channel.

[0010] The front of the left and right ends of the rear base is respectively provided with a support sliding shoe. In the left-right direction, the side close to the loading cavity belongs to the inner loading channel, and the other side belongs to the outer loading channel. The outer loading channel and the inner loading channel are separated by the support sliding shoe.

[0011] The support sliding shoe can also be provided with two side guide plates. The side guide plates are vertically arranged, and the rear sides of the two side guide plates are respectively directed to the left rear and the right rear.

[0012] Preferably, the rear base is provided with two crushing mechanism installation cavities. The crushing mechanism installation cavities are C-shaped, and the openings of the C-shaped cavities face forward. The crushing mechanism installation cavities surround the periphery of the loading cavities on the same side. The fourth ear hole is in communication with the crushing mechanism installation cavity on the same side.

[0013] The crushing mechanism is installed in the two crushing mechanism installation cavities at the same time or in one of the two crushing mechanism installation cavities. The crushing mechanism comprises a crushing torque shaft, a front-stage transmission gear set, a middle transmission gear set, a rear-stage transmission gear set and a crushing roller shaft connected in sequence. A plurality of cutter heads are arranged side by side on the crushing roller shaft and are fixed in the circumferential direction. The front end of the crushing torque shaft is the power input end thereof. The front end of the crushing torque shaft passes through the fourth ear hole and the third ear hole forwardly. The rear end of the crushing torque shaft is coaxially splined connected with the input end gear of the front-stage transmission gear set. The rear end of the crushing roller shaft is coaxially splined connected with the output end gear of the rear-stage transmission gear set. The cutter tip of the cutter head is lower than the bottom surface of the housing at the corresponding position of the rear base when the cutter tip rotates to the lowest point.

[0014] Preferably, a longitudinal groove extending in the left-right direction is arranged in the middle of the bottom surface of the rear base in the front-rear direction. The front-stage transmission gear set, the middle transmission gear set and the rear-stage transmission gear set are arranged above the longitudinal groove in the rear. The crushing torque shaft and the crushing roller shaft extend transversely across the rear base.

[0015] The two positioning pin holes correspond to and are coaxial with the two third ear holes. A positioning pin is tightly fitted in each of the positioning pin holes. The positioning pin is a hollow positioning pin.

[0016] The left and right ends of the front side of the rear base are respectively provided with a support plate. A front bearing is arranged in the support plate on the same side as the crushing mechanism. A rear bearing is arranged in the rear base. The front and rear ends of the crushing roller shaft are respectively supported on the front and rear bearings on the same side.

[0017] The beneficial effects of the present application are:

[0018] The left and right bottom surfaces of the rear body part shell are respectively provided with loading cavities, which are equivalent to increasing the internal loading channels, and can guide the coal flow entering the inside of the center line of the roller into the conveying groove of the conveyor, thereby improving the coal loading effect.

[0019] Since the crushing mechanism is installed in the rear body part shell, it can crush oversized coal gangue and rock blocks, prevent them from being stuck in the conveying channel between the machine body and the conveying groove, and solve the problems of hard pulling and broken chain of the scraper of the conveyor and the problem of traction and jamming of the coal mining machine.

[0020] Since the front and rear power connection points of the crushing torque shaft have a large span, they have sufficient flexibility, and thus have good adaptability to the machining and assembly errors of related structures.

[0021] The front-stage transmission gear set, the intermediate transmission gear set, and the rear-stage transmission gear set form the transmission mechanism of the crushing mechanism, which is installed in the rear upper part of the longitudinal groove in the shell at the rear of the machine body, not only fully utilizes the solid internal space gradually thickening at the rear of the longitudinal groove, but also avoids occupying the conveying channel above the conveying groove.

[0022] The support plate is easy to disassemble and assemble, and after the support plate is removed, the broken cutter or the corresponding cutter head can be easily replaced, and the maintenance is simple.

[0023] The crushing roller of the present application adopts multiple cutters and multiple cutter heads, and through less reduction, the crushing roller shaft can have a high rotating speed for milling-type crushing of rocks. This crushing method with less cutting amount and multiple 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 large coal gangue and rock blocks in high-speed traction state.

[0024] The parts of the rear body part shell other than the electrical cavity, the wiring channel, the loading cavity, and the crushing mechanism installation cavity are solid structures, which help to increase the weight of the rear body part to balance the weight of the rocker arm, offset the center of gravity of the entire machine to the goaf side, and maintain good stability of the front and rear of the entire machine.

[0025] The support sliding shoe separates the coal flow on both sides of the center line of the roller, avoids the obstruction of the outer coal flow to the inner coal flow when the coal mining machine moves, ensures that the inner coal and rock of the roller smoothly pass through the loading cavity to reach the conveyor without being blocked by the outer coal flow of the roller, ensures the coal loading effect of the inner coal flow of the roller, and further improves the overall coal loading effect. It can also guide more coal flow from the outer loading channel outside the center line of the roller into the conveyor, so that the crushing mechanism can crush more large coal materials. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1Structure diagram of an embodiment of the present application;

[0027] Figure 2 Side view of an embodiment of the present application;

[0028] Figure 3 Structure diagram of a coal mining machine body composed of the present application and a front body part;

[0029] Figure 4 Top view of an embodiment of the support shoe.

[0030] Reference signs:

[0031] 2. Front body part; 214. Front groove; 215. Middle groove; 29. Positioning pin;

[0032] 3. Rear body part; 31. Rear body part housing; 311. Third ear seat; 312. Rear groove; 313. Loading cavity; 314. Crushing mechanism installation cavity; 315. Wiring channel; 316. Operation cavity; 3171. Positioning pin hole; 318. Top surface; 319. Bottom surface of longitudinal groove; 32. Crushing mechanism; 321. Crushing torque shaft; 322. Crushing roller; 3221. Support plate; 3231. Front-stage transmission gear set; 3232. Intermediate transmission gear set; 3233. Rear-stage transmission gear set; 33. Electrical box;

[0033] 6. Support shoe; 611. Side guide plate;

[0034] 9. Conveyor; 91. Shovel plate; 95. Conveying groove. DETAILED DESCRIPTION

[0035] The present application discloses a thin seam compact coal mining machine rear body part 3 (which can be simply referred to as a rear body part), as shown in Figures 1-4As shown, the rear body part shell 31 extends left and right in a strip shape, and includes a rear base and a third lug 311 extending left and right forwardly in the middle of the rear base, and a rear groove 312 is formed between the third lug and the rear base. The front end face of the third lug is a large plane, and two left and right positioning pin holes 3171 are provided on the large plane. The large plane and the positioning pin holes are positioning structures when the rear body part shell is connected and fixed with the shell of the front body part 2, and the front and rear body part shells are fixed to form a T-shaped fuselage with a narrow front and a wide rear. The left and right ends of the front body part shell are respectively provided with a front groove 214 and a middle groove 215, the front groove and the rear groove simultaneously participate in the articulation of the fuselage and the rocker arm, and the middle groove is used to accommodate the arm support end of the rocker arm, so as to realize the power transmission from the front-stage cutting transmission mechanism located in the front body part to the rear-stage cutting transmission mechanism located in the arm support. A coaxial third ear hole and a fourth ear hole for articulating with the left and right rocker arms of the coal mining machine are respectively provided in the middle of the left and right two third lugs and the front section of the rear base. Wear-resistant sleeves are installed in the third ear hole and the fourth ear hole. Two left and right loading cavities 313 are respectively provided on the bottom surfaces of the left and right parts of the rear base, the loading cavities are grooves extending from front to back with the notch facing down, the loading cavities are not through grooves, the front end of the loading cavity is open and the rear end is closed. In the use state, the lower part of the rear body part is the conveying groove 95 of the conveyor 9, and the notch of the loading cavity is located above the conveying groove. The setting of the loading cavity is equivalent to increasing the built-in loading channel, which can guide the coal flow entering the inside of the center line of the drum into the conveying groove of the conveyor, thereby further improving the coal loading effect.

[0036] The top surface of the loading cavity is divided into front and rear sections, the front section is a horizontal plane, and the rear section is an inclined plane with a high front and a low rear. The coal flow entering the loading cavity will move rearward and downward after passing through a horizontal buffer zone, and then enter the conveying groove of the conveyor.

[0037] The groove bottom surface of the rear groove is provided as a concave circular cylindrical surface coaxial with the third ear hole, and the outer surface of the suspension end of the third lug is provided as a convex circular cylindrical surface coaxial with the third ear hole. The corresponding structures on the rocker arm and the rear body part shell are provided with a convex circular cylindrical surface and a concave circular cylindrical surface coaxial with the third ear hole, so that two groups of gaps with the same width are formed at the joint of the rocker arm and the rear body part shell, and by controlling the size of the corresponding gaps within a suitable range, the accumulation of coal and rock between the rocker arm and the rear body part shell during the up and down swinging of the rocker arm can be effectively controlled, and the smooth swinging is ensured.

[0038] The middle position of the rear base in the left-right direction is provided with two electrical cavities, and a wire channel 315 extending in the front-rear direction is arranged between the two electrical cavities. An electrical box 33 is arranged in the electrical cavity. The front of the two electrical cavities and the wire channel is provided with a working cavity 316 between the left and right third ear seats and the left and right rear grooves, and the wire channel is communicated with the working cavity. The rear base is in a solid structure except for the loading cavity, the electrical cavity and the wire channel, so that the rear main body part shell has sufficient weight to balance the weight of the rocker arm, so that the gravity center of the whole machine is offset to the gob side, and good stability of the whole machine is maintained.

[0039] The top surface 318 of the rear main body part shell can be provided as an inclined surface with the front being higher and the rear being lower, so as to ensure that the rear main body part shell is kept at a sufficient safety distance from the hydraulic support in the whole front-rear width range.

[0040] The front of the left and right ends of the rear base is respectively provided with a support shoe 6, which is fixedly connected with the rear base and supported on the shovel plate 91 of the conveyor. The position of the support shoe is behind the roller, preferably directly behind. Divided by the center line of the roller, the left and right sides of the support shoe close to the loading cavity belong to the inner loading channel, and the other side belongs to the outer loading channel. The outer loading channel and the inner loading channel are separated by the support shoe, which can reduce the flow of coal from the outer side of the center line of the roller to the inner side, avoid adverse effects on the inner coal flow, and ensure the loading effect of the inner loading channel.

[0041] The support shoe is provided with two side flow guide plates 611, which are vertically arranged, and the rear sides of the two side flow guide plates are respectively directed to the left rear and the right rear. The final coal material enters the conveying groove of the conveyor from the inner and outer loading channels. When a crushing mechanism is arranged on the coal mining machine, the support shoe can also guide more coal flow from the outer loading channel on the outer side of the center line of the roller to enter the conveyor, so that the crushing mechanism can crush more large coal materials.

[0042] The rear base is preferably provided with two crushing mechanism mounting cavities 314. The crushing mechanism mounting cavities are C-shaped, the opening of the C-shaped is forward, the crushing mechanism mounting cavities surround the periphery of the loading cavity on the same side, and the fourth ear hole is communicated with the crushing mechanism mounting cavity on the same side.

[0043] The left and right two crushing mechanism installation cavities are simultaneously provided with the crushing mechanism 32 or one of the left and right two crushing mechanism installation cavities is provided with the crushing mechanism 32, and the crushing mechanism comprises a crushing torque shaft 321, a front-stage transmission gear set 3231, a middle-stage transmission gear set 3232, a rear-stage transmission gear set 3233 and a crushing roller shaft which are sequentially transmissionally connected. A plurality of cutter heads are coaxially sleeved and fixed on the crushing roller shaft to form a crushing roller 322 for crushing large coal rocks. The front end of the crushing torque shaft is a power input end, and an external spline is arranged on the front end of the crushing torque shaft. The front end of the crushing torque shaft penetrates through the fourth ear hole and the third ear hole. An external spline is arranged on the rear end of the crushing torque shaft, and the rear end of the crushing torque shaft is coaxially splined coupled with the input end gear of the front-stage transmission gear set. An external spline is arranged on the rear end of the crushing roller shaft, and the rear end of the crushing roller shaft is inserted into the spline hole in the core of the output end gear of the rear-stage transmission gear set and is coaxially splined coupled with the output end gear. The crushing power is input from the front end of the crushing torque shaft, is transmitted to the front-stage transmission gear set, the middle-stage transmission gear set and the rear-stage transmission gear set at the rear end of the crushing torque shaft, and finally drives the crushing roller shaft and the cutter heads thereon to rotate to crush large coal rocks. The cutter tip of the cutter head is lower than the bottom surface of the shell at the corresponding position of the rear base body when the cutter tip rotates to the lowest point, so that effective crushing is ensured.

[0044] The cutter head comprises a cutter tooth and a cutter head sleeve. A key groove is arranged in the inner hole of the cutter head sleeve. The cutter head sleeve is sleeved on the crushing roller shaft and is fixed by means of a flat key. A plurality of cutter teeth are fixed on the cutter head sleeve in the circumferential direction. The cutter teeth and the cutter head sleeve can be fixed by welding or can be fixed by means of fasteners.

[0045] Each cutter tooth preferably adopts a combined cutter with a plurality of cutter tips. The plurality of cutter teeth are preferably distributed uniformly in the circumferential direction on the cutter head sleeve.

[0046] The crushing roller mechanism with multiple cutter teeth and multiple cutter heads is adopted. A higher rotating speed of the crushing roller shaft can be achieved by less reduction, and the milling type crushing of rocks is realized. The crushing mode with less cutting amount and more cutting times can greatly improve the crushing effect and reduce the probability that rocks are not crushed in time, and is more suitable for crushing large coal gangue blocks in a high-speed traction state.

[0047] A longitudinal groove extending in the left-right direction is arranged in the middle of the bottom surface of the rear base body in the front-rear direction. The longitudinal groove is vertically opposite to the conveying groove 95 of the conveyor 9 arranged below the rear base body. The front-stage transmission gear set, the middle-stage transmission gear set and the rear-stage transmission gear set are arranged above the rear of the longitudinal groove in the left-right direction. The solid internal space gradually thickening at the rear of the longitudinal groove in the rear base body is fully utilized, and the occupation of the conveying channel above the conveying groove and below the rear base body is avoided. For the case that the longitudinal groove is arranged, the horizontal height of the cutter tip of the cutter head when rotating to the lowest point should be lower than the groove bottom surface 319 of the longitudinal groove.

[0048] The crushing torque shaft and the crushing roller shaft extend across the rear base body. The front and rear ends of the crushing torque shaft are connected to the power source, and the crushing torque shaft has sufficient flexibility to adapt to the machining and assembly errors of the related structures.

[0049] The left and right positioning pin holes are coaxial with the left and right third ear holes, and the positioning pins 29 are tightly fitted in the positioning pin holes. The positioning pins are hollow. The center through hole of the positioning pin is coaxial with the third ear hole. The front end of the crushing torque shaft can pass through the positioning pin to connect to the related power source.

[0050] The left and right ends of the front side of the rear base body are each provided with a support plate 3221. The support plates on the same side of the crushing mechanism are provided with front bearings, and the rear base body is provided with rear bearings. The front and rear ends of the crushing roller shaft are supported on the front and rear bearings on the same side. After removing the support plates, the cutting teeth or the corresponding cutter heads of the crusher can be easily replaced, which is convenient to assemble and disassemble and easy to maintain.

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

Claims

1. A rear main body of a compact coal mining machine for thin coal seams, characterized in that: The rear main body housing extends horizontally in a strip shape. The rear main body housing includes a rear base and a third ear seat that extends horizontally and horizontally from the front of the middle of the rear base. A rear groove is formed between the third ear seat and the rear base. The front end face of the third ear seat is a large flat surface with two positioning pin holes on the left and right sides. The left and right third ear seats and the front section of the rear base are respectively provided with a coaxial third ear hole and a fourth ear hole. The bottom surfaces of the left and right sides of the rear base are respectively provided with two loading cavities. The loading cavity is a groove that extends from front to back with the groove opening facing downwards. The front end of the loading cavity is open and the rear end is closed. In the use state, the lower part of the rear main body is the conveying trough of the conveyor, and the groove opening of the loading cavity is located above the conveying trough.

2. The rear main body of the compact coal mining machine for thin coal seams as described in claim 1, characterized in that: The top surface of the loading cavity is divided into two sections: the front section is a horizontal plane, and the rear section is a sloping plane that is higher in the front and lower in the rear.

3. The rear main body of the compact coal mining machine for thin coal seams as described in claim 1, characterized in that: The bottom surface of the rear groove is configured as an inwardly concave arc cylindrical surface coaxial with the third ear hole, and the outer surface of the overhanging end of the third ear seat is configured as an outwardly convex arc cylindrical surface coaxial with the third ear hole.

4. The rear main body of the compact coal mining machine for thin coal seams as described in claim 1, characterized in that: Two electrical cavities are located in the middle of the rear base in the left-right direction. A wiring channel extending forward and backward is provided between the two electrical cavities. A working cavity is provided in front of the two electrical cavities and the wiring channel. The working cavity is located between the two third ear seats on the left and right and the two rear grooves on the left and right. The wiring channel is connected to the working cavity. The parts of the rear base other than the loading cavity, electrical cavity and wiring channel are solid structures.

5. The rear main body of the compact coal mining machine for thin coal seams as described in claim 1, 2, 3, or 4, characterized in that: Supporting slippers are installed at the front of the left and right ends of the rear base. The side of the supporting slipper closer to the loading cavity in the left and right direction belongs to the inner loading channel, and the other side belongs to the outer loading channel. The outer loading channel and the inner loading channel are separated by the supporting slipper.

6. The rear main body of the compact coal mining machine for thin coal seams as described in claim 5, characterized in that: The support shoe is equipped with two side guide plates, one on the left and one on the right. The side guide plates are both vertically arranged, and the rear sides of the two side guide plates face the left rear and the right rear, respectively.

7. The rear main body of the compact coal mining machine for thin coal seams as described in claims 1, 2, 3, 4, 5, or 6, characterized in that: The rear base has two crushing mechanism mounting cavities on the left and right sides. The crushing mechanism mounting cavities are C-shaped with the openings facing forward. The crushing mechanism mounting cavities surround the loading cavities on the same side on the left and right sides. The fourth ear hole communicates with the crushing mechanism mounting cavities on the same side on the left and right sides.

8. The rear main body of the compact coal mining machine for thin coal seams as described in claim 7, characterized in that: The crushing mechanism can be installed in both left and right crushing mechanism mounting cavities simultaneously, or in one of the left and right crushing mechanism mounting cavities. The crushing mechanism includes a crushing torque shaft, a front-stage transmission gear set, an intermediate transmission gear set, a rear-stage transmission gear set, and a crushing drum shaft that are connected in sequence. Multiple cutter discs are arranged side by side and circumferentially fixed on the crushing drum shaft. The front end of the crushing torque shaft is its power input end. The front end of the crushing torque shaft passes forward through the fourth and third ear holes. The rear end of the crushing torque shaft is coaxially splinedly connected to the input end gear of the front-stage transmission gear set. The rear end of the crushing drum shaft is coaxially splinedly connected to the output end gear of the rear-stage transmission gear set. When the cutter tip of the cutter disc rotates to the lowest point, it is lower than the bottom surface of the shell at the corresponding position of the rear base.

9. The rear main body of the compact coal mining machine for thin coal seams as described in claim 8, characterized in that: The bottom surface of the rear base has a longitudinal groove extending left and right in the middle. The front-stage transmission gear set, the intermediate transmission gear set and the rear-stage transmission gear set extend left and right and are arranged above the longitudinal groove. The crushing torque shaft and the crushing drum shaft extend forward and backward across the rear base.

10. The rear main body of the compact coal mining machine for thin coal seams as described in claim 8, characterized in that: The left and right two positioning pin holes correspond one-to-one with the left and right two third ear holes and are coaxial. Positioning pins are installed in the positioning pin holes one-to-one with each other and are tightly fitted. The positioning pins are hollow positioning pins.

11. The rear main body of the compact coal mining machine for thin coal seams as described in claim 8, characterized in that: Support plates are installed on both the left and right ends of the front side of the rear base. The support plates on the same side as the crushing mechanism are equipped with front bearings, and the rear base is equipped with rear bearings. The front and rear ends of the crushing drum shaft are respectively supported on the front and rear bearings on the same side.

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