Quick replacement clamping groove for shearer drum pick

Abstract

The utility model relates to the field of coal cutter drum pick, disclose a kind of quick replacement clamping groove of coal cutter drum pick, including the mounting seat and pick for fixed on drum, the pick lower part is provided with annular groove, the pick is fixedly installed in mounting seat by installation component, the installation component is fixedly connected in mounting seat lower part;The installation component includes the shell fixedly connected in mounting seat lower part, the horizontal sliding connection of shell inner wall has pressing lever, in the utility model, through the linkage structure of pressing lever, connecting plate, guide slot, guide rod and connecting piece, when replacing, just need to press pressing lever by tool, connecting piece can be driven to separate from the annular groove of pick, and old pick is taken out;When installing new pick, loosen pressing lever, and connecting piece is automatically clamped into annular groove by the reset of elastic member, greatly shorten replacement time, reduce the damage of knocking to pick, applicable to the scene of pick frequent loss in coal mining operation, reduce equipment downtime.

Description

Technical Field

[0001] This utility model relates to the field of coal mining machine drum cutting teeth, and in particular to a quick-change slot for coal mining machine drum cutting teeth. Background Technology

[0002] During the operation of the coal mining machine, the cutting teeth on the drum come into direct contact with the coal seam and undertake the key task of cutting and crushing the coal seam. Due to the complex geological conditions of the coal seam, the cutting teeth are easily worn and damaged under high-speed rotation and violent impact, and need to be replaced frequently to ensure coal mining efficiency and operational safety.

[0003] Currently, traditional methods for fixing the cutting teeth of coal mining machine drums mostly employ bolt fastening, welding, or nested retaining rings. Replacement requires the use of wrenches, hammers, and other tools to remove the bolts or knock the retaining rings, making the process cumbersome, especially in the confined spaces underground, and time-consuming, leading to increased equipment downtime and impacting coal mining progress. During disassembly, knocking and other operations can easily cause secondary damage to the cutting tooth body or installation area, shortening the cutting tooth's service life and increasing equipment maintenance costs. Therefore, a method for quickly replacing the retaining groove of the cutting teeth of coal mining machine drums is proposed to solve these problems. Utility Model Content

[0004] To overcome the above shortcomings, this utility model provides a quick-change slot for the cutting teeth of a coal mining machine drum, which aims to solve the problems of "cumbersome cutting tooth replacement operation, long time consumption, and easy secondary damage to the cutting teeth" in the prior art.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a quick-change slot for a coal mining machine drum cutting tooth, comprising a mounting base for fixing on the drum and a cutting tooth, wherein an annular groove is provided at the lower part of the cutting tooth, and the cutting tooth is fixedly mounted on the mounting base by a mounting assembly, wherein the mounting assembly is fixedly connected to the lower part of the mounting base;

[0006] The mounting assembly includes a housing fixedly connected to the lower part of the mounting base. A pressing rod is slidably connected to the inner wall of the housing. A connecting plate is fixedly connected to the inner wall of the pressing rod horizontally. Two sets of guide grooves are opened through the outer side of the connecting plate. A guide rod is slidably connected to the inner wall of the guide groove. A connector that snaps into the inner wall of the annular groove is fixedly connected to the upper part of the guide rod. The pressing rod and the housing are elastically connected by an elastic element.

[0007] As a further description of the above technical solution:

[0008] The upper part of the outer casing has a slot for inserting cutting teeth.

[0009] As a further description of the above technical solution:

[0010] The connecting plate slides horizontally on the inner wall of the outer shell in the left-right direction, and the connector and guide rod slide on the inner wall of the outer shell in the front-back direction.

[0011] As a further description of the above technical solution:

[0012] The connector is located above the connecting plate.

[0013] As a further description of the above technical solution:

[0014] The guide groove is an L-shaped inclined groove, and the two sets of guide grooves are symmetrically arranged.

[0015] As a further description of the above technical solution:

[0016] The right side of the pressing rod is flush with the outer side of the housing.

[0017] As a further description of the above technical solution:

[0018] The connector is provided in two sets, and the opposite side of the two sets of connectors is recessed.

[0019] As a further description of the above technical solution:

[0020] The elastic element includes a spring, one end of which contacts the outside of the pressing rod, and the other end of which contacts the inner wall of the housing.

[0021] This utility model has the following beneficial effects:

[0022] 1. In this utility model, through the linkage structure of the pressing rod, connecting plate, guide groove, guide rod and connector, when replacing, simply press the pressing rod with a tool to drive the connector out of the annular groove of the cutting tooth and remove the old cutting tooth; when installing the new cutting tooth, release the pressing rod, the elastic element resets and the connector automatically snaps into the annular groove, which greatly shortens the replacement time, reduces the damage to the cutting tooth caused by knocking, and is suitable for scenarios where cutting teeth are frequently worn in coal mining operations, reducing equipment downtime.

[0023] 2. In this utility model, the inclined guide groove is symmetrically and horizontally arranged on one side of the adjacent guide groove. When the pressing rod is slightly squeezed, the guide rod slides on the adjacent side of the guide groove. When the pressing rod moves the connecting plate, it will not move the connecting part, thereby realizing the function of preventing accidental touch and improving the practicality of the device. Attached Figure Description

[0024] Figure 1 This is a three-dimensional structural diagram of the overall device in this utility model;

[0025] Figure 2 This is a three-dimensional structural diagram of the overall device in this utility model;

[0026] Figure 3 This is a three-dimensional structural diagram of the disassembled mounting components in this utility model;

[0027] Figure 4 This is a front-view perspective three-dimensional cross-sectional view of the outer shell of this utility model;

[0028] Figure 5 This is a three-dimensional structural diagram of the guide rod and connector in this utility model.

[0029] Legend:

[0030] 1. Mounting base; 2. Cutting teeth; 3. Mounting assembly; 31. Housing; 32. Pressing rod; 33. Connecting plate; 34. Guide groove; 35. Guide rod; 36. Connector; 37. Elastic element; 4. Slot. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0032] Reference Figure 1 - Figure 3This utility model provides an embodiment of a quick-change slot for a coal mining machine drum cutting tooth, including a mounting base 1 and a cutting tooth 2 for fixing on the drum. The mounting base 1 serves as the basic fixing component of the entire device, used to stably connect the slot structure to the coal mining machine drum, providing a support carrier for the cutting tooth 2 and the mounting assembly 3, ensuring that the overall structure rotates synchronously with the drum. The cutting tooth 2 has an annular groove at its lower part. The cutting tooth 2 is a key component that directly participates in coal mining operations, and the annular groove at its lower part is the core mating structure for achieving quick assembly and disassembly. Through the snap-fit ​​fixing with the mounting assembly 3, it completes the cutting of the coal seam when the drum rotates. In the operation, the cutting tooth 2 is fixedly mounted on the mounting base 1 via the mounting assembly 3. The mounting assembly 3 enables quick replacement of the cutting tooth 2. The mounting assembly 3 is fixedly connected to the lower part of the mounting base 1. The mounting assembly 3 includes a housing 31 fixedly connected to the lower part of the mounting base 1, which serves as the external frame of the mounting assembly 3. The housing contains all linkage components such as the pressing rod 32 and the connecting plate 33, which protect the internal structure and limit the movement trajectory of each component. The pressing rod 32 is horizontally slidably connected to the inner wall of the housing 31. As an operation trigger component, it drives the connecting plate 33 to move by sliding horizontally, thereby controlling the engagement or disengagement of the connecting piece 36. The connecting plate 33 is horizontally fixedly connected to the inner wall of the pressing rod 32. It is an intermediate transmission component connecting the pressing rod 32 and the guide rod 35, and slides synchronously with the pressing rod 32 along the left and right directions of the housing 31.

[0033] Reference Figure 2 - Figure 4 Two sets of guide grooves 34 are provided through the outer side of the connecting plate 33. The guide grooves 34 are L-shaped and inclined. The two sets of guide grooves 34 are symmetrically arranged. The inclined part is used to guide the guide rod 35 to slide outward to release the cutting tooth 2 when the pressing rod 32 is subjected to force. The horizontal part restricts the position of the guide rod 35 in the non-operating state. Together with the elastic element 37, it realizes the anti-accidental contact function. The connecting piece 36 does not loosen when slightly squeezed. The guide rod 35 is slidably connected to the inner wall of the guide groove 34. The transmission element connecting the connecting plate 33 and the connecting piece 36 has its lower end embedded in the guide groove 34 and slides along the trajectory of the guide groove 34, converting the left and right movement of the connecting plate 33 into its own back and forth sliding, thereby driving the connecting piece 36. 6. Synchronous movement: The upper part of the guide rod 35 is fixedly connected to a connector 36 that snaps into the inner wall of the annular groove. There are two sets of connectors 36, and the opposite side of the two sets of connectors 36 is recessed, which can fit tightly into the annular groove to ensure that the cutting tooth 2 does not loosen after installation. The pressing rod 32 is elastically connected to the outer shell 31 through an elastic element 37. The elastic element 37 includes a spring. One end of the spring contacts the outside of the pressing rod 32, and the other end of the spring contacts the inner wall of the outer shell 31, providing a continuous restoring force for the pressing rod 32. After the cutting tooth 2 is installed, the pressing rod 32 is pushed back by the elastic force, so that the connector 36 is always tightly snapped into the annular groove, ensuring the stability of the cutting tooth 2 under high-speed operation and impact.

[0034] Reference Figure 2 - Figure 4 The upper part of the outer casing 31 has a slot 4 for inserting the cutting teeth 2, providing precise insertion guidance for the cutting teeth 2 and ensuring that the cutting teeth 2 do not need repeated alignment during installation, thus improving installation efficiency. The connecting plate 33 slides horizontally on the inner wall of the outer casing 31 in the left-right direction, and the connector 36 and guide rod 35 slide on the inner wall of the outer casing 31 in the front-back direction. The connector 36 is located above the connecting plate 33. The right side of the pressing rod 32 is flush with the outer side of the outer casing 31, making it easy for the operator to quickly find the force application point, simplifying the pressing operation, reducing labor intensity, and preventing accidental contact with gravel.

[0035] Working principle: When in use, the elastic element 37 spring is in a naturally extended state, applying a rightward pushing force to the pressing rod 32, so that the right side of the pressing rod 32 is flush with the outer side of the outer shell 31.

[0036] When the connecting plate 33 is in the right limit position along with the pressing rod 32, the two sets of symmetrical L-shaped guide grooves 34 drive the guide rod 35 to the inner position. At this time, the concave structure on the opposite side of the connecting piece 36 is tightly engaged with the annular groove at the bottom of the cutting tooth 2, and the cutting tooth 2 is stably fixed on the mounting base 1.

[0037] The slot 4 on the upper part of the outer casing 31 plays an auxiliary positioning role for the cutting teeth 2, ensuring that the cutting teeth 2 do not loosen under the high-speed rotation and impact of the drum.

[0038] When the cutting tooth 2 is disassembled, the operator presses the pressing rod 32 with a tool. The pressing rod 32 slides to the left against the elastic force of the elastic element 37, and drives the connecting plate 33 to move to the left in sync. The L-shaped guide groove 34 on the connecting plate 33 moves to the left with it. Since the guide groove 34 is inclined, the guide rod 35 is subjected to a lateral force in the inclined section of the guide groove 34, which drives the connecting piece 36 to slide outward along the front-back direction of the outer shell 31.

[0039] When the connector 36 disengages from the annular groove of the cutting tooth 2, the cutting tooth 2 is no longer fixed and can be directly removed from the slot 4 of the housing 31, thus completing the disassembly of the old cutting tooth 2.

[0040] Insert the new cutting tooth 2 into the slot 4 of the outer casing 31 with its lower part aligned until the bottom of the cutting tooth 2 is in place. Release the pressing rod 32, and the elastic element 37 spring returns to its original deformation, pushing the pressing rod 32 and the connecting plate 33 to the right to reset. When the connecting plate 33 moves, the guide groove 34 drives the guide rod 35 to slide inward, and the connecting piece 36 moves inward in sync. Its recessed structure automatically engages in the annular groove of the cutting tooth 2, completing the fixation of the new cutting tooth 2 and reducing damage to the cutting tooth 2.

[0041] The guide groove 34 is symmetrically and horizontally arranged on one side. When the pressing rod 32 is slightly squeezed and does not reach the thrust required for disassembly, the guide rod 35 only slides within the horizontal section of the guide groove 34 and will not drive the connecting piece 36 to move outward, thereby avoiding misoperation that could cause the cutting tooth 2 to loosen, and improving the safety and reliability of the device.

[0042] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A quick-change slot for a cutting tooth of a coal mining machine drum, comprising a mounting base (1) for fixing on the drum and a cutting tooth (2), characterized in that: The cutting tooth (2) has an annular groove at its lower part. The cutting tooth (2) is fixedly installed on the mounting base (1) by the mounting assembly (3). The mounting assembly (3) is fixedly connected to the lower part of the mounting base (1). The mounting assembly (3) includes a housing (31) fixedly connected to the lower part of the mounting base (1). A pressing rod (32) is horizontally slidably connected to the inner wall of the housing (31). A connecting plate (33) is horizontally fixedly connected to the inner wall of the pressing rod (32). Two sets of guide grooves (34) are opened through the outer side of the connecting plate (33). A guide rod (35) is slidably connected to the inner wall of the guide groove (34). A connector (36) is fixedly connected to the upper part of the guide rod (35) and snapped into the inner wall of the annular groove. The pressing rod (32) and the housing (31) are elastically connected by an elastic member (37).

2. The quick-change slot for the cutting teeth of a coal mining machine drum according to claim 1, characterized in that: The upper part of the outer shell (31) is provided with a slot (4) for inserting the cutting teeth (2).

3. The quick-change slot for the cutting teeth of a coal mining machine drum according to claim 1, characterized in that: The connecting plate (33) slides horizontally on the inner wall of the outer shell (31) in the left-right direction, and the connecting piece (36) and the guide rod (35) slide on the inner wall of the outer shell (31) in the front-back direction.

4. The quick-change slot for the cutting teeth of a coal mining machine drum according to claim 1, characterized in that: The connector (36) is located above the connecting plate (33).

5. The quick-change slot for the cutting teeth of a coal mining machine drum according to claim 1, characterized in that: The guide groove (34) is an L-shaped inclined groove, and the two sets of guide grooves (34) are symmetrically arranged.

6. The quick-change slot for the cutting teeth of a coal mining machine drum according to claim 1, characterized in that: The right side of the pressing rod (32) is flush with the outer side of the outer casing (31).

7. The quick-change slot for the cutting teeth of a coal mining machine drum according to claim 1, characterized in that: The connector (36) is provided in two sets, and the opposite side of the two sets of connectors (36) is recessed.

8. The quick-change slot for the cutting teeth of a coal mining machine drum according to claim 1, characterized in that: The elastic element (37) includes a spring, one end of which contacts the outside of the pressing rod (32), and the other end of which contacts the inner wall of the housing (31).

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