A coal cutter crushing device for coal mining

Abstract

This application discloses a crushing device for a coal mining machine, belonging to the field of coal mining machine technology. It includes a machine arm, with a spiral bevel gear reducer detachably mounted at the end of the machine arm. The spiral bevel gear reducer has two output shafts, each of which is connected to a main shaft. A crushing drum is fixedly sleeved on the main shaft, and a spiral strip is integrally fixed on the outside of the crushing drum. Multiple impact teeth are installed along the spiral strip's thread on the crushing drum. Buffer seats are slidably installed at opposite ends of the main shaft. Compared with traditional simple roller or hammer crushing methods, this coal mining machine crushing device, with its combination of spiral strips and impact teeth, combined with a drill bit assembly, can better guide the movement trajectory of the coal, making the crushing process more thorough and uniform. It can also achieve drilling-type crushing of high-hardness coal blocks, greatly improving coal mining crushing efficiency.

Description

Technical Field

[0001] This application relates to the field of coal mining machine technology, and more specifically, to a coal mining machine crushing device. Background Technology

[0002] The crushing drum of a coal mining machine is a key component in coal mining. Traditional coal mining machine crushing drums use simple roller or hammer crushing methods, which have unsatisfactory crushing effects and small crushing areas. When encountering coal blocks with high hardness, relying solely on the conical teeth on the crushing drum for crushing cannot fully achieve an efficient crushing process and process the material into suitable particle sizes. This not only affects the efficiency of subsequent transportation and processing but may also lead to problems such as equipment blockage. Furthermore, the vibration generated during operation is significant, which can easily damage the equipment itself, shorten its service life, and make it difficult to meet the needs of efficient mining. In view of this, we propose a coal mining machine crushing device. Utility Model Content

[0003] 1. Technical problems to be solved

[0004] The purpose of this application is to provide a coal mining machine crushing device that solves the technical problems mentioned in the background art. Compared with the traditional simple roller or hammer crushing method, the combination of spiral bar and impact teeth, combined with the drill bit assembly, can better guide the movement trajectory of coal, making the crushing process more thorough and uniform. It can also achieve drilling-type crushing of coal blocks with high hardness, greatly improving the technical effect of coal mining crushing efficiency.

[0005] 2. Technical Solution

[0006] This application provides a coal mining machine crushing device, comprising: a machine arm, a spiral bevel gear reducer detachably mounted at the end of the machine arm, the spiral bevel gear reducer having two output shafts driven by the reducer, each output shaft being driven by a main shaft, a crushing drum fixedly sleeved on the main shaft, a spiral strip integrally fixed on the crushing drum, multiple impact teeth threaded along the spiral strip on the crushing drum, a buffer seat slidably mounted on the opposite end of the main shaft, a drill bit assembly detachably and limitingly mounted on the buffer seat, the drill bit assembly including a drill body, three inclined seats fixedly connected to the drill body, a bevel gear disc rotatably mounted on each inclined seat, and multiple V-shaped drill bits fixedly mounted along the circumference of the bevel gear disc.

[0007] By adopting the above technical solution, the device is installed on the coal mining machine via a boom. Two output shafts are symmetrically arranged on the spiral bevel gear reducer at the end of the boom, each used to drive the main shaft of a crushing drum. This arrangement of the two crushing drums on either side of the spiral bevel gear reducer increases the crushing area and improves coal mining efficiency. Multiple impact teeth are evenly distributed along the spiral line on each crushing drum. These spirally distributed impact teeth efficiently crush the coal entering the crushing area. The end of the main shaft is connected to a drill bit assembly via a buffer seat. The drill bit assembly consists of a drill body, a slant seat, and a bevel gear disc mounted on the slant seat. Multiple V-shaped drill bits are fixed along the circumference of the bevel gear disc. Thus, the drill bit assembly, with its buffering capacity, can perform drilling-type crushing of high-hardness coal blocks, improving coal mining efficiency.

[0008] Optionally, the end of the arm is provided with a mounting groove, and an end cover is fixedly installed at the port of the mounting groove by bolts. A spiral bevel gear reducer is fixedly installed in the mounting groove by bolts.

[0009] By adopting the above technical solution, the installation slot can be set to ensure that the spiral bevel gear reducer can be accurately installed on the machine arm, ensuring the relative positional accuracy between the two and providing installation space for the spiral bevel gear reducer.

[0010] Optionally, the reducer housing of the spiral bevel gear reducer is fixed with slewing bearings on both sides by multiple bolts. The movable ring of the slewing bearing is fixedly connected to the main shaft, and the main shaft is slidably connected to the output shaft.

[0011] By adopting the above technical solution, slewing bearings are set on both sides of the reducer housing of the spiral bevel gear reducer, which enhances the connection strength and stability between the reducer and the main shaft. This allows the main shaft to rotate flexibly with the support of the slewing bearings, while bearing various radial and axial forces from the crushing process. The main shaft is equipped with a spline groove structure, which can be connected to the output shaft by a sliding plug-in joint, ensuring the effective transmission of power.

[0012] Optionally, the buffer seat includes a piston rod and a square block, the piston rod and the square block are fixedly connected, and a sliding cavity is provided at the opposite ends of the main shaft. The piston rod is slidably disposed in the sliding cavity, and a spring is sleeved and installed on the piston rod in the sliding cavity. Four positioning rods are threadedly connected between the square block and the drill body.

[0013] By adopting the above technical solution, the piston rod can slide freely in the slide cavity at the end of the main shaft. The spring is sleeved on the piston rod and located in the slide cavity. When the equipment vibrates during operation, the piston rod will reciprocate in the slide cavity, compressing or stretching the spring. Combined with the pressure damping effect in the slide cavity, it can play a role in buffering and shock absorption.

[0014] Optionally, the drill body has a slot structure that matches the square block on its end face near the square block, and both the drill body and the square block have four screw holes along their circumference for threaded installation of the positioning rod.

[0015] By adopting the above technical solution, the slot structure on the drill body end face matches the square block, allowing the square block to be accurately embedded in the slot, improving the positioning accuracy between the two. Four positioning rods are installed with threads evenly distributed along the circumference for positioning connection, so that the positioning rods can evenly bear the force from all directions, ensuring the stability of the drill bit assembly.

[0016] Optionally, the three inclined seats are evenly distributed along the circumference of the drill body, and the central axes of the three conical toothed discs intersect at a single point.

[0017] By adopting the above technical solution, the three inclined seats are evenly distributed along the circumference of the drill body, which can ensure that the conical tooth disc is evenly supported in all directions, avoiding the problem of equipment imbalance caused by uneven force. The central axes of the three conical tooth discs intersect at one point, so that they can form a resultant force point during operation, which can concentrate the crushing of coal and improve crushing efficiency and effect.

[0018] 3. Beneficial effects

[0019] One or more technical solutions provided in this application have at least the following technical effects or advantages: Using a spiral bevel gear reducer as the power source for two symmetrically arranged crushing drums increases the crushing area and improves coal mining efficiency. The crushing drums utilize spiral strips to distribute multiple impact teeth, allowing coal to be impacted from multiple angles and at multiple levels after entering the crushing area, greatly improving crushing efficiency. Furthermore, in conjunction with a drill bit assembly with buffering capabilities, multiple V-shaped drill bits evenly arranged around the circumference of the bevel gear disc can form a combined force during operation, concentrating the crushing of the coal and further improving the crushing effect. Compared with traditional simple roller or hammer crushing methods, the combination of spiral strips and impact teeth, combined with the drill bit assembly, can better guide the movement trajectory of the coal, making the crushing process more thorough and uniform, and enabling drilling-type crushing of high-hardness coal blocks, greatly improving coal mining crushing efficiency. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of a coal mining machine crushing device disclosed in a preferred embodiment of this application;

[0021] Figure 2 This is a schematic diagram of the arm structure of a coal mining machine crushing device disclosed in a preferred embodiment of this application;

[0022] Figure 3This is a partial exploded view of a coal mining machine crushing device disclosed in a preferred embodiment of this application;

[0023] Figure 4 A preferred embodiment of this application discloses a coal mining machine crushing device. Figure 3 Enlarged structural diagram at point A in the middle;

[0024] Figure 5 This is a schematic diagram of the crushing drum and drill bit assembly of a coal mining machine crushing device disclosed in a preferred embodiment of this application;

[0025] The following are the labels in the diagram: 1. Arm; 11. Mounting slot; 12. End cover; 2. Spiral bevel gear reducer; 21. Output shaft; 22. Slewing bearing; 3. Crushing drum; 31. Spiral blade; 32. Impact tooth; 33. Main shaft; 331. Slide cavity; 4. Drill bit assembly; 41. Drill body; 42. Inclined seat; 43. Bevel gear disc; 44. V-shaped drill bit; 5. Buffer seat; 51. Piston rod; 52. Spring; 53. Square block; 54. Positioning rod. Detailed Implementation

[0026] The present application will be further described in detail below with reference to the accompanying drawings.

[0027] Reference Figures 1 to 5This application provides a coal mining machine crushing device, comprising: a machine arm 1, a spiral bevel gear reducer 2 detachably mounted at the end of the machine arm 1, the spiral bevel gear reducer 2 having two output shafts 21 drivenly connected, each output shaft 21 being drivenly connected to a main shaft 33, a crushing drum 3 fixedly sleeved on the main shaft 33, a spiral strip 31 integrally fixedly mounted on the crushing drum 3, multiple impact teeth 32 threaded along the spiral strip 31 on the crushing drum 3, buffer seats 5 slidably mounted at opposite ends of the main shaft 33, a drill bit assembly 4 detachably and limitingly mounted on the buffer seats 5, the drill bit assembly 4 including a drill body 41, three inclined seats 42 fixedly connected to the drill body 41, a bevel gear disc 43 rotatably mounted on each inclined seat 42, multiple V-shaped drill bits 44 fixedly mounted along the circumference of the bevel gear disc 43, the device being mounted on the coal mining machine via the machine arm 1, the machine arm The spiral bevel gear reducer 2 installed at one end has two symmetrically arranged output shafts 21, which are used to drive the main shaft 33 of a crushing drum 3. The two crushing drums 3 are located on both sides of the spiral bevel gear reducer 2, which can increase the crushing area and improve the coal mining efficiency. The spiral strips 31 on each crushing drum 3 have multiple impact teeth 32 evenly distributed along the spiral line direction. The multiple impact teeth 32 distributed in the spiral start to efficiently crush the coal entering the crushing area. The end of the main shaft 33 is connected to the drill bit assembly 4 through the buffer seat 5. The drill bit assembly 4 consists of a drill body 41, a slant seat 42 and a bevel gear disk 43 installed on the slant seat 42. The bevel gear disk 43 is fixed with multiple V-shaped drill bits 44 along the circumference. Thus, the drill bit assembly 4 with a certain buffering capacity can realize the drilling and crushing of coal blocks with high hardness, thereby improving the coal mining efficiency.

[0028] Reference Figure 1 and Figure 2 The end of the machine arm 1 is provided with a mounting groove 11, and an end cover 12 is fixedly installed at the port of the mounting groove 11 by bolts. The spiral bevel gear reducer 2 is fixedly installed in the mounting groove 11 by bolts. The setting of the mounting groove 11 can ensure that the spiral bevel gear reducer 2 can be accurately installed on the machine arm 1, ensuring the relative positional accuracy between the two and providing installation space for the spiral bevel gear reducer 2.

[0029] Reference Figure 1 and Figure 3The spiral bevel gear reducer 2 has slewing bearings 22 fixed to both sides of the reducer housing by multiple bolts. The movable ring of the slewing bearing 22 is fixedly connected to the main shaft 33, and the main shaft 33 is slidably connected to the output shaft 21. The slewing bearings 22 on both sides of the reducer housing of the spiral bevel gear reducer 2 enhance the connection strength and stability between the reducer and the main shaft 33, allowing the main shaft 33 to rotate flexibly with the support of the slewing bearings 22, while bearing various radial and axial forces from the crushing process. The main shaft 33 has a spline groove structure, which can be slidably connected to the output shaft 21, ensuring the effective transmission of power.

[0030] Reference Figures 3 to 5 The buffer seat 5 includes a piston rod 51 and a square block 53, which are fixedly connected. A sliding cavity 331 is provided at the opposite end of the main shaft 33. The piston rod 51 is slidably disposed in the sliding cavity 331, and a spring 52 is sleeved and installed on the piston rod 51 in the sliding cavity 331. Four positioning rods 54 are threadedly connected between the square block 53 and the drill body 41. The piston rod 51 can slide freely in the sliding cavity 331 at the end of the main shaft 33. The spring 52 is sleeved on the piston rod 51 and located in the sliding cavity 331. When the equipment vibrates during operation, the piston rod 51 will reciprocate in the sliding cavity 331, compressing or stretching the spring 52. With the damping effect of the pressure in the sliding cavity 331, it plays a role in buffering and shock absorption.

[0031] Reference Figure 3 and Figure 5 The drill body 41 has a slot structure that matches the square block 53 on its end face near the square block 53. Both the drill body 41 and the square block 53 have four screw holes along the circumference for threaded installation of positioning rods 54. The slot structure on the end face of the drill body 41 matches the square block 53, so that the square block 53 can be accurately embedded in the slot, improving the positioning accuracy between the two. The four positioning rods 54 are evenly distributed along the circumference for positioning connection, so that the positioning rods 54 can evenly bear the force from all directions, ensuring the stability of the drill bit assembly 4.

[0032] Reference Figure 3 and Figure 5 The three inclined seats 42 are evenly distributed along the circumference of the drill body 41, and the central axes of the three conical toothed discs 43 intersect at a point. The even distribution of the three inclined seats 42 along the circumference of the drill body 41 can ensure that the conical toothed discs 43 are evenly supported in all directions, avoiding the problem of equipment imbalance caused by uneven force. The central axes of the three conical toothed discs 43 intersect at a point, so that they can form a resultant force point during operation, which can concentrate the crushing of coal and improve crushing efficiency and effect.

[0033] Working principle: The device is installed on the coal mining machine via the arm 1. A spiral bevel gear reducer 2 is installed at the end of the arm 1. Its two output shafts 21 respectively transmit power to the main shaft 33 of the corresponding crushing drum 3, so that the main shaft 33 drives the corresponding crushing drum 3 to rotate. The spiral strip 31 on the crushing drum 3 has multiple impact teeth 32 evenly distributed along the spiral line direction. The multiple impact teeth 32 distributed in the spiral start to efficiently crush the coal entering the crushing area. The piston rod 51 in the buffer seat 5 is in a balanced state under the action of the spring 52. As the crushing process proceeds, when encountering larger pieces or coal with higher hardness, a large reaction force is generated, causing the piston rod 51 to compress the spring 52 inward in the slide cavity 331, thereby buffering the impact force and protecting the equipment. The drill body 41 and the bevel gear disk 43 rotate together under the drive of the main shaft 33. Multiple V-shaped drill bits 44 evenly distributed along the circumference of the bevel gear disk 43 perform drilling-type crushing of coal with higher hardness. The two crushing drums 3 are symmetrically arranged along the spiral bevel gear reducer 2, which increases the crushing area and improves the coal mining efficiency.

Claims

1. A coal cutter crushing device for a coal cutter, characterised by: Includes: a machine arm (1), a spiral bevel gear reducer (2) detachably mounted at the end of the machine arm (1), the spiral bevel gear reducer (2) being driven to two output shafts (21), each of the output shafts (21) being driven to a main shaft (33), a crushing drum (3) being fixedly sleeved on the outside of the main shaft (33), a spiral strip (31) being integrally fixed on the outside of the crushing drum (3), multiple impact teeth (32) being threaded along the spiral strip (31) on the crushing drum (3), a buffer seat (5) being slidably mounted on the opposite end of the main shaft (33), a drill bit assembly (4) being detachably and limitedly mounted on the buffer seat (5), the drill bit assembly (4) including a drill body (41), three inclined seats (42) being fixedly connected to the drill body (41), a bevel gear disc (43) being rotatably mounted on each of the inclined seats (42), and multiple V-shaped drill bits (44) being fixedly mounted on the bevel gear disc (43) along the circumference.

2. The coal breaker device for a coal mining machine according to claim 1, characterized in that: The end of the arm (1) is provided with a mounting groove (11), and an end cover (12) is fixedly installed at the port of the mounting groove (11) by bolts. A spiral bevel gear reducer (2) is fixedly installed in the mounting groove (11) by bolts.

3. A coal cutter crushing device for a coal cutter as claimed in claim 2, characterised in that: The spiral bevel gear reducer (2) has a slewing bearing (22) fixed on both sides of the reducer housing by multiple bolts. The movable ring of the slewing bearing (22) is fixedly connected to the main shaft (33), and the main shaft (33) is slidably inserted into the output shaft (21).

4. The coal breaker device for a coal mining machine according to claim 1, characterized in that: The buffer seat (5) includes a piston rod (51) and a square block (53). The piston rod (51) and the square block (53) are fixedly connected. Each end of the main shaft (33) is provided with a sliding cavity (331). The piston rod (51) is slidably disposed in the sliding cavity (331). A spring (52) is sleeved and installed in the sliding cavity (331) of the piston rod (51). Four positioning rods (54) are threadedly connected between the square block (53) and the drill body (41).

5. A shearer breaker apparatus according to claim 4, wherein: The drill body (41) has a slot structure that matches the square block (53) on the end face near the square block (53). The drill body (41) and the square block (53) are provided with four screw holes along the circumference for threaded installation of the positioning rod (54).

6. The coal breaker device for a coal mining machine according to claim 1, characterized in that: The three inclined seats (42) are evenly distributed along the circumference of the drill body (41), and the central axes of the three conical discs (43) intersect at a point.

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