A new type of coal mining machine limit device

Abstract

This utility model discloses a novel limiting device for a coal mining machine, including a geared rail. An upper limiting block and a lower limiting block are respectively provided between two pins on the geared rail. The upper and lower limiting blocks are connected to each other by fixing bolts. Removable shims are installed on both the upper and lower limiting blocks. By providing removable shims between the middle and side plates of the upper and lower limiting blocks, the overall size of the limiting blocks can be flexibly adjusted. For the two mainstream geared rails with pitches of 126mm and 147mm, only the number of shims needs to be increased or decreased to accurately adapt to different pin spacings, eliminating the need to customize limiting devices for different geared rail specifications, thus reducing spare parts procurement costs and inventory management difficulties.

Description

Technical Field

[0001] This utility model relates to the field of coal mining technology, specifically a novel coal mining machine limiting device. Background Technology

[0002] The rack and pinion mechanism of a coal mining machine provides support and transmits power. Due to the harsh environment and low visibility in underground working faces, the machine can easily fall off the rack when it reaches either end due to improper operation or inadequate observation by the operators. Similarly, in fully mechanized mining faces with a certain angle of inclination, failure to decelerate in time can also lead to the machine derailing. Once a coal mining machine falls off the rack and needs to be hoisted back into position, this process can easily damage the machine and rack or cause a safety accident.

[0003] In existing technologies, coal mining machine limiting devices have been designed to address the aforementioned problems. For example, Chinese authorized patent CN202222835489.7 discloses a limiting device and a coal mining machine, which prevents excessive movement of the coal mining machine by installing limiting blocks between the pins of the toothed rail. However, this method has significant limitations. Traditional coal mine toothed rails commonly come in two specifications: 126mm and 147mm pitch, with a pin spacing difference of up to 21mm. Traditional limiting blocks are mostly of fixed size. If they are adapted to 126mm pitch toothed rails, the lateral clearance on 147mm pitch toothed rails is too large (making them prone to loosening). If they are adapted to 147mm pitch toothed rails, they cannot be installed on 126mm pitch toothed rails, requiring separate customization for different specifications, increasing spare parts costs and management complexity. In addition, some limiting devices have simple buffer structures, which are prone to failure after long-term impact, and may still cause hard collision damage to the equipment.

[0004] Therefore, a new type of coal mining machine limiting device is proposed. Summary of the Invention

[0005] The purpose of this utility model is to provide a new type of coal mining machine limiting device to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a novel coal mining machine limiting device, including a toothed rail, wherein an upper limit block and a lower limit block are respectively provided between two pins on the toothed rail, the upper limit block and the lower limit block are connected to each other by fixing bolts, and a removable gasket is installed on both the upper limit block and the lower limit block.

[0007] Preferably, both the upper limit block and the lower limit block are of a split design, including a middle plate;

[0008] The middle plate is provided with a first side plate and a second side plate on both sides, and a plurality of gaskets are respectively located between the first side plate and the middle plate and between the second side plate and the middle plate.

[0009] Preferably, clamping bolts are passed through the first side plate, the gasket, the middle plate, and the second side plate.

[0010] Preferably, a clamping nut is embedded in the second side plate, and the clamping nut is compatible with the clamping bolt.

[0011] Preferably, the upper limit block has an internal hexagonal hole on its middle plate, and the fixing bolt passes through the two middle plates and is fitted with a fixing nut.

[0012] Preferably, a buffer pad is installed on the opposite side of both the first side plate and the second side plate.

[0013] Preferably, the cushioning pad is made of flame-retardant rubber.

[0014] Compared with existing technologies, the advantages of this invention are: by setting detachable shims between the middle plate and side plate of the upper and lower limit blocks, the overall size of the limit blocks can be flexibly adjusted. For the two mainstream gear rails with pitches of 126 and 147, only the number of shims needs to be increased or decreased to accurately adapt to different pin spacings, eliminating the need to customize limit devices for different specifications of gear rails, thus reducing spare parts procurement costs and inventory management difficulties.

[0015] The limit block adopts a split structure. When the side plate or buffer pad is deformed or worn due to long-term use, the damaged parts can be disassembled and replaced separately, without the need to scrap the entire limit device, which greatly reduces maintenance costs and downtime. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 This is a three-dimensional structural schematic diagram of the present invention;

[0018] Figure 3 This is an exploded view of the structure of this utility model.

[0019] In the diagram: 1. Gear rail; 2. Upper limit block; 21. First side plate; 22. Middle plate; 23. Clamping bolt; 24. Second side plate; 25. Clamping nut; 3. Lower limit block; 4. Fixing bolt; 5. Washer; 6. Socket hexagon hole; 7. Fixing nut; 8. Buffer pad. Detailed Implementation

[0020] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0021] Please see Figure 1-3This utility model provides a technical solution: a novel coal mining machine limiting device, including a toothed rail 1, with an upper limit block 2 and a lower limit block 3 respectively provided between two pins on the toothed rail 1, the upper limit block 2 and the lower limit block 3 being connected to each other by fixing bolts 4, and a detachable gasket 5 being installed on both the upper limit block 2 and the lower limit block 3.

[0022] like Figure 3 As shown: The upper limit block 2 and the lower limit block 3 are both designed as separate units, including a middle plate 22. The middle plate 22 has a first side plate 21 and a second side plate 24 on both sides. Multiple shims 5 are located between the first side plate 21 and the middle plate 22 and between the second side plate 24 and the middle plate 22, respectively. With the above arrangement, multiple shims 5 are located between the middle plate 22 and the first side plate 21 and the second side plate 24, respectively. With the shims 5, the size of the upper limit block 2 and the lower limit block 3 can be adjusted more quickly when needed, which is convenient for adapting to 126 pitch gear rails or 147 pitch gear rails.

[0023] like Figure 1 and Figure 3 As shown: clamping bolts 23 pass through the first side plate 21, the gasket 5, the middle plate 22, and the second side plate 24. A clamping nut 25 is embedded in the second side plate 24 and is adapted to the clamping bolts 23. With the above arrangement, the clamping bolts 23 pass through the first side plate 21, the gasket 5, the middle plate 22, and the second side plate 24 in sequence, and cooperate with the clamping nut 25 on the second side plate 24. This allows multiple parts to be combined together, and thus can better cooperate with the gear rail 1 to limit the movement of the coal mining machine.

[0024] like Figure 2 and Figure 3 As shown: The middle plate 22 of the upper limit block 2 has an internal hexagonal hole 6. The fixing bolt 4 passes through the two middle plates 22 and is equipped with a fixing nut 7. With the above arrangement, the internal hexagonal hole 6 makes it easy to place the top of the fixing bolt 4. Then, the fixing bolt 4 passes through the two middle plates 22 and is equipped with a fixing nut 7, so that the upper limit block 2 and the lower limit block 3 can be connected together to complete the installation of this device.

[0025] like Figure 2 As shown: Buffer pads 8 are installed on the opposite sides of the first side plate 21 and the second side plate 24. The buffer pads 8 are made of flame-retardant rubber. With the above settings, the buffer pads 8 can be connected by adhesive or screws. When the coal mining machine is parked, it will first contact the buffer pads 8, which can protect the coal mining machine's sliding shoes and gear rails and save maintenance costs.

[0026] Working principle: For the two mainstream gear rails with pitches of 126 and 147, the size can be adjusted by adding or removing the detachable shims 5 in the upper limit block 2 and the lower limit block 3.

[0027] When adapting to a 126 pitch gear rail, remove some of the shims 5 to reduce the distance between the middle plate 22 and the two side plates 21 and 24, so that the overall width of the limit block matches the spacing of the pins.

[0028] When adapting to a 147 pitch gear rail, increase the number of 5 shims and increase the width of the limit block to adapt to a wider pin spacing.

[0029] After adjustment, clamping bolt 23 passes through the first side plate 21, gasket 5, middle plate 22 and second side plate 24, and is fastened to clamping nut 25 on the second side plate 24 to ensure the stability of the limit block structure.

[0030] The adjusted upper limit block 2 and lower limit block 3 are placed between the two pins of the gear rail 1. The upper and lower limit blocks are connected and fixed by the fixing bolt 4 through the middle plate 22 of the upper and lower limit blocks and the fixing nut 7. The internal hexagonal hole 6 facilitates the installation of the fixing bolt 4.

[0031] When the coal mining machine reaches both ends of the toothed rail, the first side plate 21 and the second side plate 24 of the limiting block form a physical barrier to prevent the coal mining machine from falling off the toothed rail. At the same time, the flame-retardant rubber buffer pads 8 on the side plates can absorb impact energy, reduce the hard collision damage between the coal mining machine slipper and the limiting block, and extend the service life of the equipment.

[0032] Because of its modular design, if the side plate, buffer pad 8 or gasket 5 is worn or deformed, the damaged parts can be disassembled and replaced individually, eliminating the need for an overall scrapping limit device, which effectively reduces maintenance costs and downtime.

[0033] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A new type of coal mining machine limiting device, comprising a toothed rail (1), characterized in that: The upper limit block (2) and the lower limit block (3) are respectively provided between the two pins on the gear rail (1). The upper limit block (2) and the lower limit block (3) are connected to each other by fixing bolts (4). Both the upper limit block (2) and the lower limit block (3) are equipped with removable gaskets (5).

2. A novel coal cutter position limiting device according to claim 1, characterized in that: The upper limit block (2) and the lower limit block (3) are both split designs, including the middle plate (22); The middle plate (22) is provided with a first side plate (21) and a second side plate (24) on both sides, and a plurality of gaskets (5) are located between the first side plate (21) and the middle plate (22) and between the second side plate (24) and the middle plate (22).

3. A novel coal cutter position limiting device according to claim 2, characterized in that: Clamping bolts (23) are passed through the first side plate (21), the gasket (5), the middle plate (22), and the second side plate (24).

4. A novel coal cutter position limiting device according to claim 3, characterized in that: A clamping nut (25) is embedded in the second side plate (24), and the clamping nut (25) is compatible with the clamping bolt (23).

5. A novel coal cutter position limiting device according to claim 1, characterized in that: The upper limit block (2) has an internal hexagonal hole (6) on the middle plate (22), and the fixing bolt (4) passes through the two middle plates (22) and is equipped with a fixing nut (7).

6. A novel coal cutter position limiting device according to claim 2, characterized in that: A buffer pad (8) is installed on the opposite side of the first side plate (21) and the second side plate (24).

7. A novel coal mining machine limiting device according to claim 6, characterized in that: The buffer pad (8) is made of flame-retardant rubber.

Images