A cutting section and a tunneling machine having the same.

Abstract

This application relates to the field of tunneling equipment technology, specifically to a cutting unit, which includes at least a cutting roller and a cutting tooth assembly. The cutting tooth assembly includes a fixed tooth base, cutting teeth, and a disassembly / assembly device. The disassembly / assembly device includes a mounting housing located below the fixed tooth base, a stop component located inside the mounting housing, and an adjustment component for driving the rotation of the inner rotating disk. In this cutting unit, the cutting tooth assembly restricts the axial movement freedom of the cutting teeth within the fixed tooth base through the disassembly / assembly device. Furthermore, the stop component of the disassembly / assembly device is located inside the mounting housing, preventing damage from external hard objects such as coal and rock debris. This cutting unit also has a back-turn function; the back-turn component prevents the inner rotating disk from rotating clockwise, avoiding improper rotation of the inner rotating disk due to vibration during construction and ultimately causing the stop component to fail.

Description

Technical Field

[0001] This application relates to the field of mining machinery, specifically to a cutting section and a tunneling machine having therein. Background Technology

[0002] The cutting section is a crucial component of coal mining machines and tunneling machines, primarily responsible for cutting and crushing coal and rock. Its main functions include using cutting teeth to break coal or rock off the working face and loading it into the conveying system. The cutting section typically consists of a cutting cylinder, transmission device, reducer, and cutting motor, among other components that work together to achieve efficient cutting operations.

[0003] The cutting tooth assembly, spirally arranged on the cutting cylinder, is the component that directly contacts the coal and rock. It typically includes a cutting tooth seat fixed to the assembly and cutting teeth rotatably mounted on the seat. To limit the axial movement of the cutting teeth, annular grooves are usually provided on the outer wall of the teeth, and C-type metal clamps are used for fixation. Due to the extremely harsh working environment of the cutting tooth assembly, the C-type clamps often fail, causing the cutting teeth to shift or even fall off. Summary of the Invention

[0004] A cutting section includes at least a cutting roller and a cutting tooth assembly disposed on the cutting roller, the cutting tooth assembly comprising:

[0005] A fixed toothed seat is fixedly mounted on the cutting roller;

[0006] The cutting tooth includes at least a cutting cone portion, a rotating column disposed on the cutting cone portion and rotatably disposed within a fixed tooth base, and a limiting annular groove disposed on the rotating column.

[0007] A disassembly and assembly device, disposed at the rear end of the fixed tooth holder, is used to rotatably mount the cutting tooth within the fixed tooth holder. The disassembly and assembly device includes:

[0008] The mounting housing is located below the fixed gear seat;

[0009] The rotating inner disc is located inside the mounting housing;

[0010] A stop assembly is provided inside the mounting housing. The stop assembly is driven to swing by a rotating inner disk. The stop assembly is inserted into a limiting ring groove to restrict the axial degree of freedom of the cutting teeth.

[0011] Adjustment components are used to drive the inner rotating disc to rotate.

[0012] As a further implementation plan:

[0013] The mounting housing includes a cylindrical disc, a central circular hole at the upper end of the cylindrical disc, a circular inner cavity below the central circular hole, and perforated lugs evenly distributed circumferentially on the lower half of the inner wall of the circular inner cavity.

[0014] The rotating inner disk includes a rotatable annular base disposed within the circular inner cavity, active insert rods evenly distributed circumferentially on the upper surface of the annular base, incomplete arc teeth evenly distributed circumferentially on the outer edge of the upper surface of the annular base, and adjusting arc holes evenly distributed circumferentially within the annular base and corresponding one-to-one with the incomplete arc teeth. The rotating inner disk also includes an arc-shaped outer groove evenly distributed circumferentially on the outer wall of the annular base and corresponding one-to-one with the perforated lugs, an arc-shaped core rod disposed within the arc-shaped outer groove and inserted into the corresponding perforated lugs, and a reset spring wound around the arc-shaped core rod for driving the rotating inner disk to rotate counterclockwise.

[0015] The stop assembly is located above the annular base in the circular inner cavity. The stop assembly corresponds one-to-one with the active insertion rod. The stop assembly includes a stop mandrel on the upper end face of the circular inner cavity, a rotatable stop main arm on the stop mandrel, a limiting arc plate on the stop main arm for insertion into the limiting ring groove, and a driven slot on the stop main arm. The driven slot is inserted into the active insertion rod.

[0016] The adjustment components correspond one-to-one with the adjustment arc holes. Each adjustment component includes an adjustment longitudinal hole in a circular inner cavity, an adjustment gear shaft that is rotatable and located in the adjustment longitudinal hole and passes through the corresponding adjustment arc hole, and a drive gear located on the adjustment gear shaft and meshing with the corresponding incomplete arc tooth.

[0017] As a further implementation plan:

[0018] The cutting section also includes a backstop assembly, which includes an inclined countersunk hole located in the upper half of the front of the annular base. The inclined countersunk hole is inclined from left rear to right front. A backstop mandrel is rotatably provided in the inclined countersunk hole. A swinging backstop block is formed on the backstop mandrel and is located in the inclined countersunk hole. A friction pad is provided at the stop end of the lower half of the backstop block. A pressure pad is provided on the right side of the lower half of the backstop block. The mounting housing also has a side arc hole, the height of which corresponds to the upper half of the backstop block.

[0019] Beneficial effects:

[0020] The cutting part described in this case has a cutting tooth assembly whose axial movement freedom of the cutting teeth in the fixed tooth seat is restricted by a disassembly and assembly device, and the stop component of the disassembly and assembly device is located inside the mounting housing to prevent it from being damaged by hard objects such as external coal and rock debris.

[0021] The cutting part described in this case is simple to operate. It only requires pressing the anti-reverse component to unlock the rotational freedom of the inner disc, and rotating the adjustment component and rotating the inner disc to achieve synchronous swinging of the circumferentially distributed blocking components, thereby realizing the insertion and locking of the cutting teeth.

[0022] The cutting part described in this case has a backstop function. The backstop component can prevent the inner rotating disk from rotating clockwise, thus avoiding the situation where the inner rotating disk rotates improperly due to vibration during construction and ultimately causes the stop component to fail. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of one embodiment of a tunneling machine in the prior art.

[0024] Figure 2 This is a schematic diagram of one embodiment of the cutting section in the prior art.

[0025] Figure 3 This is a schematic diagram of one embodiment of the cutting tooth assembly described in this case.

[0026] Figure 4 This is a front view of one implementation of the cutting tooth assembly described in this case.

[0027] Figure 5 This is a front view of one embodiment of the cutting tooth described in this case.

[0028] Figure 6 yes Figure 4 A sectional view of section AA in one state.

[0029] Figure 7 yes Figure 4 A cross-sectional view of section AA in another state.

[0030] Figure 8 This is a partial cross-sectional view of one embodiment of the mounting housing.

[0031] Figure 9 This is a cross-sectional view of one embodiment of the rotating inner disk.

[0032] Figure 10 This is a schematic diagram of one embodiment of the blocking component.

[0033] Figure 11 yes Figure 9 Enlarged schematic diagram of section B in the middle.

[0034] Figure 12 yes Figure 7 A cross-sectional view of one embodiment of the CC section.

[0035] Figure 13 This is a schematic diagram of one embodiment of the anti-reverse swing block, friction pad, and pressure pad.

[0036] In the picture:

[0037] 9. Cutting section; 91. Cutting roller; 92. Cutting tooth assembly;

[0038] 8. Fixed gear seat;

[0039] 7. Cutting teeth; 71. Cutting cone; 72. Rotating cylinder; 73. Limiting annular groove;

[0040] 6. Assembly / disassembly device;

[0041] 1. Housing assembly; 11. Cylindrical disc; 12. Central circular hole; 13. Circular inner cavity; 14. Lug with perforation; 15. Side-mounted arc hole;

[0042] 2. Rotating inner disc; 21. Annular base; 22. Active insertion rod; 23. Incomplete arc tooth; 24. Adjusting arc hole; 25. Arc-shaped outer groove; 26. Arc-shaped core rod; 27. Reset spring.

[0043] 3. Stop assembly; 31. Stop spindle; 32. Stop main arm; 33. Limiting arc plate; 34. Driven slot;

[0044] 4. Adjustment components; 41. Adjustment longitudinal hole; 42. Adjustment gear shaft; 43. Drive gear;

[0045] 5. Anti-reverse assembly, 51. Inclined countersunk hole, 52. Anti-reverse mandrel, 53. Anti-reverse swing block, 54. Friction pad, 55. Pressure pad. Detailed Implementation

[0046] A cutting section includes at least a cutting roller 91 and a cutting tooth assembly 92 disposed on the cutting roller 91, the cutting tooth assembly 92 comprising:

[0047] The fixed toothed seat 8 is fixedly mounted on the cutting roller 9;

[0048] The cutting tooth 7 includes at least a cutting cone portion 71, a rotating column 72 disposed on the cutting cone portion 71 and rotatably disposed in the fixed tooth seat 8, and a limiting annular groove 73 disposed on the rotating column 72.

[0049] Disassembly and assembly device 6, disposed at the rear end of fixed tooth base 8, is used to rotatably mount cutting tooth 7 within fixed tooth base 8. Disassembly and assembly device 6 includes:

[0050] The mounting housing 1 is located below the fixed toothed seat 8;

[0051] The inner rotating disc 2 is located inside the mounting housing 1;

[0052] The stop assembly 3 is located inside the mounting housing 1. The stop assembly 3 is driven to swing by the rotating inner disk 2. The stop assembly 3 is inserted into the limiting ring groove 73 to restrict the axial degree of freedom of the cutting tooth 7.

[0053] Adjustment component 4 is used to drive the inner rotating disk 2 to rotate.

[0054] As a further implementation plan:

[0055] The mounting housing 1 includes a cylindrical disk 11, a central circular hole 12 at the upper end of the cylindrical disk 11, a circular inner cavity 13 below the central circular hole 12, and perforated lugs 14 evenly distributed circumferentially on the lower half of the inner wall of the circular inner cavity 13.

[0056] The rotating inner disk 2 includes an annular base 21 rotatably disposed within the circular inner cavity 13, active insert rods 22 circumferentially distributed on the upper end face of the annular base 21, incomplete arc teeth 23 circumferentially distributed on the outer edge of the upper end face of the annular base 21, and adjusting arc holes 24 circumferentially distributed within the annular base 21 and corresponding to the incomplete arc teeth 23. The rotating inner disk 2 also includes an arc-shaped outer groove 25 circumferentially distributed on the outer wall of the annular base 21 and corresponding to the perforated lugs 14, an arc-shaped core rod 26 disposed within the arc-shaped outer groove 25 and inserted into the corresponding perforated lugs 14, and a reset spring 27 wound around the arc-shaped core rod 26 for driving the rotating inner disk 2 to rotate counterclockwise.

[0057] The stop assembly 3 is located above the annular base 21 in the circular inner cavity 13. The stop assembly 3 corresponds one-to-one with the active insertion rod 22. The stop assembly 3 includes a stop spindle 31 on the upper end face of the circular inner cavity 13, a rotatable stop main arm 32 on the stop spindle 31, a limiting arc plate 33 at the stop end of the stop main arm 32 for insertion into the limiting ring groove 73, and a driven slot 34 on the stop main arm 32. The driven slot 34 is inserted into the active insertion rod 22.

[0058] The adjustment component 4 corresponds one-to-one with the adjustment arc hole 24. The adjustment component 4 includes an adjustment longitudinal hole 41 disposed in the circular inner cavity 13, an adjustment gear shaft 42 rotatably disposed in the adjustment longitudinal hole 41 and passing through the corresponding adjustment arc hole 24, and a drive gear 43 disposed on the adjustment gear shaft 42 and meshing with the corresponding incomplete arc tooth 23.

[0059] As a further implementation plan:

[0060] The cutting section also includes a backstop assembly 5, which includes an inclined countersunk hole 51 located in the upper part of the front of the annular base 21. The inclined countersunk hole 51 is inclined from left rear to right front. A backstop mandrel 52 is rotatably provided in the inclined countersunk hole 51. A swinging backstop block 53 is formed on the backstop mandrel 52 and is located in the inclined countersunk hole 51. A friction pad 54 is provided at the stop end of the lower half of the backstop block 53. A pressure pad 55 is provided on the right side of the lower half of the backstop block 53. The mounting housing 1 is also provided with a side arc hole 15. The height position of the side arc hole 15 corresponds to the upper half of the backstop block 53.

[0061] Furthermore, the adjusting arc hole 24 is coaxially arranged with the cylindrical disk 11.

[0062] Furthermore, a slot or cross-shaped slot is provided below the adjusting gear shaft 42 of any adjusting component 4.

[0063] Furthermore, the adjustment arc hole 24 is provided with three holes.

[0064] Furthermore, the active insertion rod 22 is provided in three parts.

[0065] Furthermore, the driven slot 34 is arranged along the length direction of the stop arm 32.

[0066] It should be noted that the friction end block 54 and the pressure end block 55 are made of soft wear-resistant material.

[0067] The cutting part provides a solution for effectively fixing the cutting tooth 7 within the fixed tooth base 8, and the specific implementation method is as follows:

[0068] Step 1: Press down the anti-reverse component 5 to unlock the rotational freedom of the inner rotating disk 2.

[0069] Insert the first tool (such as a screwdriver) through the side-mounted arc hole 15 and abut it against the upper half of the anti-reverse swing block 53;

[0070] The distal end of the anti-reverse swing block 53 rotates clockwise and squeezes the pressure pad 55, causing the friction end block 54 to disengage from the inner wall of the central circular hole 12, thus unlocking the rotational freedom of the rotating inner disk 2.

[0071] Step 2, the stop component 3 retracts:

[0072] Using the second tool, rotate the drive gear 43 and the adjusting gear shaft 42. The adjusting gear shaft 42 drives the incomplete arc tooth 23, the ring base 21, and the drive rod 22 to rotate clockwise over the damping of 27.

[0073] The active insertion rod 22 acts on the corresponding driven slot 34, thereby driving the stop assembly 3 to rotate around the stop spindle 31, and the limiting arc plate 33 deflects outward to facilitate the insertion of the cutting tooth 7.

[0074] The cutting tooth 7 passes through the fixed tooth base 8, the central round hole 12, and the circular inner cavity 13 from top to bottom;

[0075] Extract the first tool;

[0076] Step 3, rotate inner disk 2 to reset:

[0077] The reset spring 27 acts on the annular base 21 and drives the rotating inner disk 2 to rotate counterclockwise to reset. The limiting arc plate 33 deflects inward and inserts into the limiting ring groove 73, thus limiting the axial movement freedom of the cutting tooth 7.

[0078] Meanwhile, during the counterclockwise rotation of the inner rotating disk 2, a limited frictional force is generated between the friction end block 54 and the central circular hole 12, but this does not affect the rotation of the inner rotating disk 2.

[0079] Step 4, Attitude Locking:

[0080] When the inner rotating disk 2 tends to rotate clockwise, it pushes the anti-reverse swing block 53 to rotate counterclockwise through the friction end block 54. However, the counterclockwise rotation of the anti-reverse swing block 53 causes the friction and compressive stress between it and the inner wall of the central circular hole 12 to increase sharply, thereby locking the posture of the inner rotating disk 2.

[0081] The case also discloses a tunneling machine that uses the aforementioned cutting section.

Claims

1. A cutting section, characterized in that: The cutting section includes at least a cutting roller and a cutting tooth assembly disposed on the cutting roller, the cutting tooth assembly including: A fixed toothed seat is fixedly mounted on the cutting roller; The cutting tooth includes at least a cutting cone portion, a rotating column disposed on the cutting cone portion and rotatably disposed within a fixed tooth base, and a limiting annular groove disposed on the rotating column. The disassembly and assembly device is located at the rear end of the fixed tooth base, and is used to rotatably mount the cutting tooth in the fixed tooth base; The disassembly / assembly device includes: The mounting housing is located below the fixed gear seat; The rotating inner disc is located inside the mounting housing; A stop assembly is provided inside the mounting housing. The stop assembly is driven to swing by a rotating inner disk. The stop assembly is inserted into a limiting ring groove to restrict the axial degree of freedom of the cutting teeth. Adjustment components are used to drive the inner rotating disc to rotate; The mounting housing includes a cylindrical disc, a central circular hole at the upper end of the cylindrical disc, a circular inner cavity below the central circular hole, and perforated lugs evenly distributed circumferentially on the lower half of the inner wall of the circular inner cavity. The rotating inner disk includes a rotatable annular base disposed within the circular inner cavity, active insert rods evenly distributed circumferentially on the upper surface of the annular base, incomplete arc teeth evenly distributed circumferentially on the outer edge of the upper surface of the annular base, and adjusting arc holes evenly distributed circumferentially within the annular base and corresponding one-to-one with the incomplete arc teeth. The rotating inner disk also includes an arc-shaped outer groove evenly distributed circumferentially on the outer wall of the annular base and corresponding one-to-one with the perforated lugs, an arc-shaped core rod disposed within the arc-shaped outer groove and inserted into the corresponding perforated lugs, and a reset spring wound around the arc-shaped core rod for driving the rotating inner disk to rotate counterclockwise. The stop assembly is located above the annular base in the circular inner cavity. The stop assembly corresponds one-to-one with the active insertion rod. The stop assembly includes a stop mandrel on the upper end face of the circular inner cavity, a rotatable stop main arm on the stop mandrel, a limiting arc plate on the stop main arm for insertion into the limiting ring groove, and a driven slot on the stop main arm. The driven slot is inserted into the active insertion rod. The adjustment components correspond one-to-one with the adjustment arc holes. The adjustment components include an adjustment longitudinal hole in the circular inner cavity, an adjustment gear shaft that is rotatable in the adjustment longitudinal hole and passes through the corresponding adjustment arc hole, and a drive gear on the adjustment gear shaft that meshes with the corresponding incomplete arc tooth. The cutting section also includes a backstop assembly, which includes an inclined countersunk hole located in the upper half of the front of the annular base. The inclined countersunk hole is inclined from left rear to right front. A backstop mandrel is rotatably provided in the inclined countersunk hole. A swinging backstop block is formed on the backstop mandrel and is located in the inclined countersunk hole. A friction pad is provided at the stop end of the lower half of the backstop block. A pressure pad is provided on the right side of the lower half of the backstop block. The mounting housing is also provided with a side arc hole. The height of the side arc hole corresponds to the upper half of the backstop block. By pressing the anti-reverse component, the rotational freedom of the inner disc is unlocked, and by rotating the adjustment component and the inner disc, the circumferentially distributed blocking components are oscillated synchronously, thereby enabling the insertion and locking of the cutting teeth.

2. The cutting part according to claim 1, characterized in that: The adjusting arc hole is coaxially arranged with the cylindrical disk.

3. The cutting section according to claim 2, characterized in that: Each adjusting component has a slot (either a slot with a slotted rod or a slot with a cross-shaped slot) located below its adjusting gear shaft.

4. A cutting section according to claim 3, characterized in that: The adjustment arc hole is provided in three parts.

5. A cutting section according to claim 4, characterized in that: The active insertion rod is provided in three parts.

6. A cutting section according to claim 5, characterized in that: The driven slot is arranged along the length direction of the stop arm.

7. A tunneling machine, characterized in that: It has a cutting portion as described in any one of claims 1-6.

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