Crushing device for coal mining machine

Abstract

The utility model discloses a crushing device for a coal mining machine, which comprises a fixed seat and a fixed ferrule, the fixed seat is provided with a cutting pick, the cutting pick comprises a drill bit and a column body, the column body is provided with three pairs of through holes, the interior of the column body is designed to be a cavity, and the inner wall of the cavity is provided with three concave slideways along the through holes; according to the locking device and the fixing ferrule designed by the utility model, through the combined application of the clamping block, the spring and the concave slideway, the cutting pick is flexibly mounted and adjusted on the fixing seat, so that the cutting pick is more convenient to replace or the mounting length is more convenient to change; the mounting length of the cutting pick on the fixed seat is determined by selecting different penetrating holes, and can be adjusted according to specific requirements, so that the use flexibility and diversity are improved, the cutting pick can be better protected, and the service life of the cutting pick is prolonged; the design that the internal threads are matched with the external threads is adopted, the fixing ferrule can be easily fixed to the fixing base, the installation process is simplified, and the working efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of coal mining machines, in particular to a crushing device used for coal mining machines. Background Art

[0002] The pick in the crushing device of the coal mining machine is an important component used for crushing and cutting coal. The pick is usually conical and has a sharp cutting edge, which can effectively crush and cut the coal. The main function of the pick is to cut and crush the coal through its sharp cutting edge when the crushing device rotates, thereby helping the coal mining machine to carry out coal mining operations smoothly. However, the length of the pick installed on the crushing device is generally fixed and cannot be adjusted according to factors such as the hardness of the coal seam, which may cause excessive wear on the vulnerable parts of the pick, reducing the overall durability and service life. Utility Model Content

[0003] In order to solve the above-mentioned technical problem that "the length of the pick installed on the crushing device is generally fixed, and cannot be adjusted according to factors such as the hardness of the coal seam, which may cause excessive wear of the vulnerable parts of the pick, reducing the overall durability and service life", the utility model provides a crushing device for a coal mining machine.

[0004] The technical solution of the utility model is achieved in this way:

[0005] A crushing device for a coal mining machine comprises a fixed seat and a fixed ring, a cutting tooth is installed on the fixed seat, the cutting tooth comprises a drill bit and a column, three pairs of penetration holes are arranged on the column, the interior of the column is designed as a cavity, the inner wall of the cavity is provided with a concave slide along the annular circumference where the penetration holes are located, and each annular circumference of the penetration holes is provided with a concave slide, the upper half of the fixed seat is inclined and designed with a semi-open inner cavity, the inner wall at the opening of the inner cavity is designed with an internal thread, a locking device is welded to the bottom of the inner cavity, the locking device comprises a fixed column, one end of the fixed column is welded to the bottom of the inner wall of the inner cavity, and the other end is welded with a hollow pipe, a spring is installed in the hollow pipe, both ends of the spring are fixedly connected with a card block, and the card block on the locking device matches the penetration hole on the cutting tooth.

[0006] A pair of grooves are arranged on the inner wall of the inner cavity at positions corresponding to the clamping blocks.

[0007] The drill bit is fixed on the top end of the column by welding.

[0008] The diameter of the bottom of the column is larger than the diameter of other positions of the column, and the inner wall of the bottom of the column is designed to be inclined.

[0009] The fixing ring is designed with an external thread, the external thread matches the internal thread, and the fixing ring is fixed on the fixing seat through the thread.

[0010] The locking device and the fixing ring jointly mount the pick on the fixing seat.

[0011] When the clamping block locks the penetration hole, it is unlocked by unlocking pliers.

[0012] The fixing seat is fixed on the crushing wheel of the coal mining machine by welding.

[0013] Beneficial Effects

[0014] (1) Flexible adjustment: By selecting different penetration holes to determine the installation length of the pick on the fixed seat, it can be adjusted according to specific needs, which increases the flexibility and diversity of use, and can better protect the pick and extend its service life.

[0015] (2) Structural innovation: The utility model has designed a novel locking device and a fixing ring. Through the combined use of a clamping block, a spring and an inner concave slide, the pick can be flexibly installed and adjusted on the fixing seat, making it more convenient to replace the pick or change the installation length.

[0016] (3) Easy installation: With the design of matching internal and external threads, the fixing ring can be easily fixed on the fixing seat, which simplifies the installation process and improves work efficiency.

[0017] (4) Easy operation: The design of the locking device makes unlocking and replacing the picks simple and intuitive. Only locking pliers are needed to operate, which reduces the complexity of operations during maintenance and replacement of parts.

[0018] (5) Improving stability: A groove is provided on the inner wall of the inner cavity to further fix the relative position of the block and the pick, which can increase the stability and reliability of the pick and improve the working efficiency and safety of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a front view of a crushing device for a coal mining machine of the utility model;

[0020] Figure 2 This is a schematic diagram of the internal structure of a crushing device for a coal mining machine of the utility model;

[0021] Figure 3 This is a schematic diagram of the internal structure of a fixing seat of a crushing device for a coal mining machine according to the utility model;

[0022] Figure 4 This is a schematic diagram of the internal structure of a pick of a crushing device for a coal mining machine according to the utility model;

[0023] Figure 5 This is a front view of a pick of a crushing device for a coal mining machine according to the utility model;

[0024] Figure 6 This is a front view of a fixed collar of a crushing device for a coal mining machine according to the utility model;

[0025] Figure 7 This is a front view of a locking pliers for a crushing device of a coal mining machine according to the utility model;

[0026] Figure 8 The utility model is a use state diagram of a crushing device for a coal mining machine.

[0027] 1. Fixed seat; 2. Cutting teeth; 3. Drill bit; 4. Column; 5. Penetration hole; 6. Cavity; 7. Concave slideway; 8. Inner cavity; 9. Internal thread; 10. Fixed ring; 11. Locking device; 12. Fixed column; 13. Hollow pipe; 14. Spring; 15. Block; 16. Groove; 17. External thread; 18. Locking pliers. DETAILED DESCRIPTION

[0028] like Figures 1 to 8 As shown, the utility model is a crushing device for a coal mining machine, comprising a fixed seat 1 and a fixed ring 10, wherein the fixed seat 1 is fixed to the crushing wheel of the coal mining machine by welding, a pick 2 is installed on the fixed seat 1, and the pick 2 is used to crush coal blocks, and the fixed seat 1 and the fixed ring 10 are used to install the pick 2 on the crushing wheel, and the pick 2 comprises a drill bit 3 and a column 4, wherein the drill bit 3 is conical in shape and is used to drill coal blocks, and the drill bit 3 is fixed to the top of the column 4 by welding, and the drill bit 3 is away from the top A fixed seat 1 is arranged on the outside, and three pairs of through holes 5 are arranged on the column 4. The through holes 5 are used to adjust the position of the pick 2 installed on the fixed seat 1. The interior of the column 4 is designed as a cavity 6. The cavity 6 is used to design the position where the pick 2 is locked by the fixed seat 1. The inner wall of the cavity 6 is provided with a concave slide 7 along the annular circle where the through holes 5 are located. Each annular circle of the through holes 5 is provided with a concave slide 7. The concave slide 7 inertialy adjusts the insertion distance of the pick 2 when the pick 2 is inserted into the fixed seat 1.

[0029] The upper half of the fixed seat 1 is tilted and designed with a semi-open inner cavity 8, and the inner cavity 8 is used to design a structure for locking the pick 2. The inner wall of the inner cavity 8 at the opening is designed with an internal thread 9, and the internal thread 9 is used to install a fixed ring 10. A locking device 11 is welded to the bottom of the inner cavity 8, and the locking device 11 is used to lock the pick 2 and adjust the installation position of the pick 2 on the fixed seat 1.

[0030] The locking device 11 includes a fixing column 12, one end of which is welded to the bottom of the inner wall of the inner cavity 8, and the other end is welded with a hollow pipe 13. The fixing seat 1 is used to install the hollow pipe 13, and a spring 14 is installed in the hollow pipe 13. Both ends of the spring 14 are fixedly connected with a clamping block 15. The hollow pipe 13 is used to install the clamping block 15. The spring 14 makes the two clamping blocks 15 move away from each other until they are against the inner wall of the inner cavity 8. The clamping block 15 on the locking device 11 matches the through hole 5 on the pick 2. When the pick 2 is installed on the fixing seat 1, the clamping block 15 passes through the through hole 5 and is against the inner wall of the inner cavity 8, so that the pick 2 is locked on the fixing seat 1. Since there are three pairs of through holes 5 with different positions, the installation length of the pick 2 on the fixing seat 1 can be determined by selecting and locking different through holes 5.

[0031] The bottom diameter of the column 4 is larger than the diameter of other positions of the column 4, the bottom inner wall of the column 4 is designed to be inclined, and the block 15 is designed with a rounded corner at one end close to the inner wall of the inner cavity 8. This is to allow the two blocks 15 to be compressed by the relative movement spring 14 through the bottom inner wall of the column 4 when the pick 2 is installed into the fixed seat 1, so that the block 15 is received into the cavity 6 of the pick 2. By adjusting and rotating the pick 2, the position of the block 15 avoids the penetration hole 5, and only the block 15 is allowed to abut against the concave slide 7. By feeling the impact of the block 15 and the concave slide 7, the position of the block 15 is judged to select the concave slide 7 where the final stop is, and then the pick 2 is rotated to push the block 15 out of the penetration hole 5 and abut against the inner wall of the inner cavity 8.

[0032] A pair of grooves 16 are provided on the inner wall of the inner cavity 8 at positions corresponding to the clamping block 15 , and the clamping block 15 extends into the grooves 16 . The grooves 16 are used to further fix the relative positions of the clamping block 15 and the cutting tooth 2 in the axial direction of the inner cavity 8 .

[0033] The fixing ring 10 is designed with an external thread 17 , which matches the internal thread 9 . The fixing ring 10 is fixed to the fixing seat 1 through threads. The locking device 11 and the fixing ring 10 together mount the pick 2 on the fixing seat 1 .

[0034] When the block 15 locks the penetration hole 5, it is unlocked by the unlocking pliers 18. The unlocking pliers 18 are extended to the position of the block 15, and the unlocking pliers 18 are pressed against the block 15 with force, so that the two blocks 15 are compressed relative to the moving spring 14 until the block 15 escapes from the penetration hole 5, and the pick 2 is rotated so that the block 15 no longer corresponds to the position of the penetration hole 5, and then the pick 2 is pulled out of the fixing seat 1.

[0035] The working process of the utility model is:

[0036] The pick 2 is inserted into the inner cavity 8 of the fixed seat 1, and the two blocks 15 are compressed relative to the moving spring 14 through the inner wall at the bottom of the column 4, so that the block 15 is received in the cavity 6 of the pick 2. The pick 2 is adjusted and rotated so that the position of the block 15 avoids the penetration hole 5, and only the block 15 is against the concave slide 7. The position of the block 15 is judged by feeling the collision between the block 15 and the concave slide 7 to select the concave slide 7 where the final stop is, and then the pick 2 is rotated to push the block 15 out of the penetration hole 5 and against the inner wall of the inner cavity 8. By selecting different penetration holes 5, the length of the pick 2 installed on the fixed seat 1 is changed, and the locking device 11 is locked. After locking the pick 2, put the fixing ring 10 on the pick 2, and tighten the fixing ring 10 by matching the internal thread 9 and the external thread 17 until the pick 2 is fastened to the fixing seat 1 by the fixing ring 10. When it is necessary to replace the pick 2 or change the installation length of the pick 2 on the fixing seat 1, unscrew the fixing ring 10, and then extend the unlocking pliers 18 to the position of the block 15. Use force to push the unlocking pliers 18 against the block 15, so that the two blocks 15 are relatively moved. The spring 14 is compressed until the block 15 escapes from the penetration hole 5, and the pick 2 is rotated so that the block 15 no longer corresponds to the position of the penetration hole 5, and then the pick 2 is pulled out of the fixing seat 1.

[0037] The utility model designs a novel locking device 11 and a fixed ring 10. Through the combined use of the clamping block 15, the spring 14 and the concave slide 7, the flexible installation and adjustment of the pick 2 on the fixed seat 1 is realized, making it more convenient to replace the pick 2 or change the installation length; by selecting different penetration holes 5 to determine the installation length of the pick 2 on the fixed seat 1, it can be adjusted according to specific needs, which increases the flexibility and diversity of use, and can better protect the pick 2 and extend its service life; the design of the matching internal thread 9 and the external thread 17 is adopted, and the fixed ring 10 can be easily fixed on the fixed seat 1, which simplifies the installation process and improves the work efficiency; the design of the locking device 11 makes it simple and intuitive to unlock and replace the pick 2, and only needs to use the unlocking pliers 18 for operation, which reduces the complexity of operation during maintenance and replacement of parts; the inner wall of the inner cavity 8 is provided with a groove 16 for further fixing the relative position of the clamping block 15 and the pick 2, which can increase the stability and reliability of the pick 2 and improve the work efficiency and safety of the device.

Claims

1. A crushing device for a coal mining machine, characterized in that: The invention comprises a fixing seat (1) and a fixing ring (10), wherein a pick (2) is mounted on the fixing seat (1), wherein the pick (2) comprises a drill bit (3) and a column (4), wherein three pairs of penetration holes (5) are arranged on the column (4), wherein the interior of the column (4) is designed as a cavity (6), wherein an inner wall of the cavity (6) is provided with a concave slideway (7) along the annular circumference where the penetration holes (5) are located, wherein each annular circumference of the penetration holes (5) is provided with an inner concave slideway (7), and the upper half of the fixing seat (1) is inclinedly designed with a semi-open inner cavity (8) The inner wall of the opening of the inner cavity (8) is designed with an internal thread (9), and a locking device (11) is welded to the bottom of the inner cavity (8). The locking device (11) includes a fixing column (12), one end of the fixing column (12) is welded to the bottom of the inner wall of the inner cavity (8), and the other end is welded to a hollow pipe (13), a spring (14) is installed in the hollow pipe (13), and both ends of the spring (14) are fixedly connected with a clamping block (15), and the clamping block (15) on the locking device (11) matches the through hole (5) on the pick (2).

2. A crushing device for a coal mining machine according to claim 1, characterized in that: A pair of grooves (16) are provided on the inner wall of the inner cavity (8) at positions corresponding to the clamping blocks (15).

3. A crushing device for a coal mining machine according to claim 1, characterized in that: The drill bit (3) is fixed to the top end of the column (4) by welding.

4. A crushing device for a coal mining machine according to claim 1, characterized in that: The diameter of the bottom of the column (4) is larger than the diameter of other positions of the column (4), and the inner wall of the bottom of the column (4) is designed to be inclined.

5. A crushing device for a coal mining machine according to claim 1, characterized in that: The fixing ring (10) is designed with an external thread (17), the external thread (17) matches the internal thread (9), and the fixing ring (10) is fixed to the fixing seat (1) via the thread.

6. A crushing device for a coal mining machine according to claim 1, characterized in that: The locking device (11) and the fixing ring (10) together mount the pick (2) on the fixing seat (1).

7. A crushing device for a coal mining machine according to claim 1, characterized in that: When the clamping block (15) locks the penetration hole (5), it is unlocked by means of the unlocking pliers (18).

8. A crushing device for a coal mining machine according to claim 1, characterized in that: The fixing seat (1) is fixed on the crushing wheel of the coal mining machine by welding.

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