Highly abrasion resistant smooth shoe and coal cutter comprising the same

Abstract

The utility model relates to a high wear -resisting smooth shoe and contain its coal -winning machine belong to coal -winning machine technical field. A kind of high wear -resisting smooth shoe, including smooth shoe body and wear plate;The bottom surface of smooth shoe body is equipped with positioning pin;Wear plate is opened with first positioning pin hole, and first positioning pin hole is matched with positioning pin;Wear plate is installed to the bottom surface of smooth shoe body by the cooperation of first positioning pin hole and positioning pin, in first positioning pin hole along the periphery of positioning pin by bevel welding welding mode, and in the periphery of wear plate by bevel welding combined with fillet welding welding mode, wear plate is welded in the bottom surface of smooth shoe body. A kind of coal -winning machine contains aforementioned high wear -resisting smooth shoe. The utility model is welded wear plate in the bottom surface of smooth shoe body additionally, the thickness of wear plate can be adjusted according to different mining working face requirement, and wear plate can be replaced after wearing, so that smooth shoe body can be reused, greatly save cost.

Description

Technical Field

[0001] This utility model relates to the field of coal mining machine technology, and in particular to a high wear-resistant smooth shoe and a coal mining machine including the same. Background Technology

[0002] The smooth shoe is a key component for the movement of a coal mining machine. During normal operation, it sits on the scraper conveyor's shovel or trough side, supporting the machine. Due to the weight of the coal mining machine, sliding friction occurs between the bottom surface of the smooth shoe and the scraper conveyor's shovel or trough side, which can easily lead to wear and failure of the smooth shoe. This can result in the coal mining machine having to be shut down for maintenance, affecting the efficiency of coal mining.

[0003] Traditional coal mining machine smooth shoes typically improve their wear resistance by hardening the bottom surface or welding a wear-resistant layer onto the bottom surface. However, hardening by hardening generally results in a shallow layer with low hardness, while welding a wear-resistant layer is prone to cracking and produces excessive surface roughness. The smooth shoes obtained using these two methods do not perform ideally in actual underground use and cannot meet customer requirements. Summary of the Invention

[0004] The purpose of this invention is to address the above-mentioned problems by providing a highly wear-resistant smooth shoe and a coal mining machine incorporating the same.

[0005] The purpose of this utility model is achieved as follows:

[0006] A highly wear-resistant smooth boot includes a smooth boot body and a wear-resistant plate; the bottom surface of the smooth boot body is provided with a positioning pin; the wear-resistant plate is provided with a first positioning pin hole, and the first positioning pin hole matches the positioning pin.

[0007] The wear-resistant plate is installed to the bottom surface of the smooth boot body through the cooperation of the first positioning pin hole and the positioning pin. The wear-resistant plate is welded to the bottom surface of the smooth boot body by beveling welding around the positioning pin in the first positioning pin hole, and by a combination of beveling welding and triangular welding around the wear-resistant plate.

[0008] The wear-resistant plate is also provided with plug welding holes, which are used to weld the wear-resistant plate to the bottom surface of the smooth boot body by plug welding.

[0009] The smooth boot body has a second positioning pin hole on its bottom surface. The first end of the positioning pin is installed in the second positioning pin hole, and the second end of the positioning pin protrudes from the bottom surface of the smooth boot body for connection with the first positioning pin hole.

[0010] The second end of the positioning pin is provided with a first U-shaped annular bevel that is recessed inward from the outer surface. The first positioning pin hole is a blind hole. A second U-shaped annular bevel that is recessed outward from the inner surface is provided around the periphery of the blind hole. A welding space for the bevel welding is formed between the first U-shaped annular bevel and the second U-shaped annular bevel.

[0011] The first end of the locating pin has a chamfer of no more than 20 degrees.

[0012] The wear-resistant plate is made of wear-resistant steel plate, and the parameters of the wear-resistant steel plate are required to be no less than 1300MPa yield strength, 1700MPa tensile strength, 525-575HBW Brinell hardness, 8% elongation A5, and 30J impact toughness at -40℃.

[0013] The wear-resistant plate has chamfered edges around its perimeter.

[0014] This utility model also provides a coal mining machine, which includes the high wear-resistant smooth boots described in any of the preceding descriptions.

[0015] The beneficial effects of this utility model are as follows: by welding an additional wear-resistant plate to the bottom surface of the smooth boot body, the thickness of the wear-resistant plate can be adjusted according to the requirements of different mining working faces, and the wear-resistant plate can be replaced after wear, so that the smooth boot body can be reused, which greatly saves costs. Attached Figure Description

[0016] Figure 1 A schematic diagram of the structure of a first embodiment of the high wear-resistant smooth boot of this utility model is shown;

[0017] Figure 2 A schematic diagram of the structure of the second locating pin hole located on the bottom surface of the smooth boot body is shown;

[0018] Figure 3 It shows Figure 2 AA rotated section view;

[0019] Figure 4 A schematic diagram of the wear-resistant plate structure is shown.

[0020] Figure 5 A schematic diagram of the locating pin is shown.

[0021] Explanation of reference numerals in the attached figures:

[0022] 1-Smooth shoe body; 2-Abrasion-resistant plate; 3-Positioning pin; 11-Second positioning pin hole; 21-First positioning pin hole; 22-Plug welding hole. Detailed Implementation

[0023] Various embodiments of this utility model will be described with reference to the accompanying drawings. In the specification and drawings, elements with similar structures or functions will be represented by the same element symbols. It is understood that the drawings are for reference and illustration only and are not intended to limit the scope of this utility model. The dimensions shown in the drawings are merely for clarity of description and do not limit the proportional relationships or provide an exhaustive description of the utility model, nor do they limit the scope of this utility model.

[0024] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0025] This invention proposes a highly wear-resistant, smooth boot.

[0026] In Example 1, as Figure 1-3 As shown, a high-wear-resistant smooth boot includes a smooth boot body 1 and a wear-resistant plate 2. The bottom surface of the smooth boot body 1 is provided with a locating pin 3. The wear-resistant plate 2 has a first locating pin hole 21, which matches the locating pin 3. The wear-resistant plate 2 also has a plug welding hole 22. The wear-resistant plate 2 is installed to the bottom surface of the smooth boot body 1 through the cooperation of the first locating pin hole 21 and the locating pin 3. The wear-resistant plate 2 is welded to the bottom surface of the smooth boot body 1 by beveling along the periphery of the locating pin 3 within the first locating pin hole 21 and then plugging in the plug welding hole 22. Furthermore, the wear-resistant plate 2 is welded to the bottom surface of the smooth boot body 1 by a combination of beveling and triangular welding around its periphery. By providing the locating pin 3, it serves two purposes: firstly, it provides positioning during the installation of the wear-resistant plate 2; secondly, it acts as a pin, increasing the shear resistance of the wear-resistant plate 2 and preventing slippage of the wear-resistant plate 2 during operation. Then, bevel welding is used to flatten the locating pin 3 around its perimeter, resulting in a smooth surface. Furthermore, compared to welding only around the wear-resistant plate 2, welding around the locating pin 3 allows the wear-resistant plate 2 to be more firmly welded to the bottom surface of the smooth boot body 1, while avoiding the adverse consequences of weld overlay that can easily cause cracks.

[0027] Preferably, the wear-resistant plate 2 has chamfers around its four sides. The wear-resistant plate 2 is made of wear-resistant steel plate, and the parameters of the wear-resistant steel plate are required to be no less than yield strength of 1300MPa, tensile strength of 1700MPa, Brinell hardness of 525-575HBW, elongation A5 of 8%, and impact toughness of 30J at -40℃.

[0028] Furthermore, a second positioning pin hole 11 is provided on the bottom surface of the smooth boot body 1, and the first end of the positioning pin 3 is installed in the second positioning pin hole 11. Preferably, the first end of the positioning pin 3 has a chamfer of no more than 20 degrees, and the second end of the positioning pin 3 protrudes from the bottom surface of the smooth boot body 1 for connection with the first positioning pin hole 21.

[0029] To reserve welding space for bevel welding, the second end of the locating pin 3 is provided with a first U-shaped annular bevel that is recessed from the outer surface inward. The first locating pin hole 21 is a blind hole, and a second U-shaped annular bevel that is recessed from the inner surface outward is provided around the periphery of the blind hole, so that a welding space for bevel welding is formed between the first U-shaped annular bevel and the second U-shaped annular bevel.

[0030] In this embodiment, by welding an additional wear-resistant plate to the bottom surface of the smooth boot body, the thickness of the wear-resistant plate can be adjusted according to the requirements of different mining working faces. Moreover, the wear-resistant plate can be replaced after wear, so that the smooth boot body can be reused, which greatly saves costs.

[0031] This utility model also provides a coal mining machine that uses the high wear-resistant smooth shoe described in Embodiment 1. This allows the coal mining machine to adapt to the requirements of different mining faces by adjusting the thickness of the wear-resistant plate. Furthermore, the wear-resistant plate can be replaced after wear, allowing the smooth shoe body to be reused, greatly saving costs.

[0032] While specific embodiments of this utility model have been described above, those skilled in the art should understand that these are merely illustrative examples, and the scope of protection of this utility model is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of this utility model, but all such changes and modifications fall within the scope of protection of this utility model.

Claims

1. A highly wear-resistant, smooth boot, characterized in that, It includes a smooth boot body and a wear-resistant plate; the bottom surface of the smooth boot body is provided with a positioning pin; the wear-resistant plate is provided with a first positioning pin hole, and the first positioning pin hole matches the positioning pin; The wear-resistant plate is installed to the bottom surface of the smooth boot body through the cooperation of the first positioning pin hole and the positioning pin. The wear-resistant plate is welded to the bottom surface of the smooth boot body by beveling welding around the positioning pin in the first positioning pin hole, and by a combination of beveling welding and triangular welding around the wear-resistant plate.

2. The high abrasion-resistant smooth boot according to claim 1, characterized in that, The wear-resistant plate is also provided with plug welding holes, which are used to weld the wear-resistant plate to the bottom surface of the smooth boot body by plug welding.

3. The high abrasion-resistant smooth boot according to claim 1, characterized in that, A second positioning pin hole is provided on the bottom surface of the smooth boot body. The first end of the positioning pin is installed in the second positioning pin hole, and the second end of the positioning pin protrudes from the bottom surface of the smooth boot body for connection with the first positioning pin hole.

4. The high abrasion-resistant smooth boot according to claim 3, characterized in that, The second end of the positioning pin is provided with a first U-shaped annular bevel that is recessed inward from the outer surface. The first positioning pin hole is a blind hole. A second U-shaped annular bevel that is recessed outward from the inner surface is provided around the periphery of the blind hole. A welding space for the bevel welding is formed between the first U-shaped annular bevel and the second U-shaped annular bevel.

5. The high abrasion-resistant smooth boot according to claim 4, characterized in that, The first end of the locating pin has a chamfer of no more than 20 degrees.

6. The high abrasion-resistant smooth boot according to claim 1, characterized in that, The wear-resistant plate is made of wear-resistant steel plate, and the parameters of the wear-resistant steel plate are required to be no less than 1300MPa yield strength, 1700MPa tensile strength, 525-575HBW Brinell hardness, 8% elongation A5, and 30J impact toughness at -40℃.

7. The high abrasion-resistant smooth boot according to claim 1, characterized in that, The wear-resistant plate has chamfered edges around its perimeter.

8. A coal mining machine, characterized in that, The product comprises a highly abrasion-resistant smooth boot as described in any one of claims 1-7.

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