Shearer screw drum and shearer

Abstract

The application provides a coal mining machine screw drum and a coal mining machine, and belongs to the technical field of coal mining machines. The coal mining machine screw drum comprises a drum barrel, a first end disc connected with the drum barrel, a plurality of key grooves arranged along the circumferential direction of the first end disc, a second end disc embedded on the outer surface of the first end disc and detachably connected with the first end disc, a plurality of keys arranged on the inner hole of the second end disc, the keys corresponding to the key grooves one by one and matched with the key grooves, and a connecting piece for connecting the first end disc and the second end disc. According to the technical scheme, the detachable end disc is designed in the form of a mortise and tenon structure and a bolt joint, so that the accessory can be directly replaced without welding in the underground, and the service life of the drum is improved.

Description

Technical Field

[0001] This application belongs to the field of coal mining machine technology, specifically relating to a coal mining machine spiral drum and a coal mining machine. Background Technology

[0002] The drum is the actuator in the coal mining machine, consuming 80% of the total power of the coal mining machine. The main functions of the drum are coal dropping and loading. During the cutting process, the cutting teeth on the end plate of the drum are in a closed cutting state, without the pressure and tension effect of the coal wall. The force is relatively large, and the tooth seat is prone to failure. Under harsh working conditions, the cutting teeth wear out quickly. If the cutting teeth are not replaced in time, the tooth seat will wear out. After the tooth seat wears out, the drum will fail, reducing the service life of the drum. Utility Model Content

[0003] The embodiments of this application are intended to at least improve one of the technical problems existing in the prior art or related art.

[0004] In view of this, the object of the embodiments of this application is to provide a spiral drum for a coal mining machine.

[0005] Another object of embodiments of this application is to provide a coal mining machine.

[0006] To achieve the above objectives, a spiral drum for a coal mining machine is provided according to the first aspect of this application, comprising: a drum body; a first end plate connected to the drum body, having multiple keyways along the circumferential direction of the first end plate; a second end plate embedded in the outer surface of the first end plate and detachably connected to the first end plate, having multiple keys on the inner hole of the second end plate, each key corresponding to a keyway and engaging with a keyway; and a connecting member for connecting the first end plate and the second end plate.

[0007] The auger drum for a coal mining machine according to this application includes a drum body, a first end plate, a second end plate, and connecting parts. The drum body, as the main structure of the auger drum, supports and connects other components. The first end plate is fixedly connected to the drum body and has multiple keyways along its circumference. The second end plate is embedded in the outer surface of the first end plate and is detachably connected to it. The inner hole of the second end plate has a key corresponding to the keyways. The key and keyway engagement serves both positioning and torque transmission, bearing shear force, and enables quick assembly and disassembly of the end plates, facilitating maintenance or replacement of worn parts. The connecting parts are used to fix the first and second end plates. Shear force is borne by a mortise and tenon structure, and a reliable connection is achieved through a helical engagement. The end plates are divided into two parts: one part is welded to the drum body, and the other part has a welded toothed seat as an accessory. This allows for direct replacement of the accessory underground without the need for welding, thus extending the drum's service life.

[0008] In some technical solutions, optionally, a first through hole is provided in the middle of the keyway, and a second through hole is provided in the center of the key. The second through hole and the first through hole are used to pass through a connector.

[0009] In this technical solution, a first through hole is provided in the middle of the keyway, and a second through hole is provided in the center of the key. The second through hole and the first through hole are used to pass through a connector, thereby connecting the first end plate and the second end plate.

[0010] In some technical solutions, optionally, the number of keyways is 4 to 8, and the diameter of the second through hole is greater than or equal to 35 mm and less than or equal to 45 mm.

[0011] In this technical solution, the number of keyways is 4 to 8, and the diameter of the second through hole is greater than or equal to 35 mm and less than or equal to 45 mm. Specifically, the number of keyways is 6, and the diameter of the second through hole is 40 mm. The 6 keyways can evenly transmit the high torque of the coal mining machine's cutting section, avoiding hub deformation or key shear failure caused by stress concentration in a single keyway. The multi-keyway design can still maintain connection stability even when individual keyways wear, making it particularly suitable for high-vibration conditions in underground coal mines.

[0012] In some technical solutions, optionally, multiple keyways are evenly arranged along the circumference of the first end plate, and the key and keyway are interference-fitted.

[0013] In this technical solution, multiple keyways are evenly arranged along the circumference of the first end plate. The key and the keyway are interference-fitted, which can both play a positioning role and transmit torque and withstand shear force.

[0014] In some technical solutions, optionally, the first through hole includes a threaded hole, which is an M36 threaded hole; the connecting element includes a bolt.

[0015] In this technical solution, the first through hole includes a threaded hole, which is an M36 threaded hole; the connecting part includes a bolt, and the threaded hole and the bolt can provide higher connection strength, which is suitable for the high vibration conditions of the spiral drum of the coal mining machine, prevents the key and keyway from loosening due to vibration, facilitates the disassembly of the second end plate during maintenance, and replaces worn parts, which meets the requirements of modular design.

[0016] In some technical solutions, optionally, the first end plate is a low-alloy structural steel end plate, and the surface of the keyway is treated with high-frequency quenching, with a surface hardness greater than 50HRC.

[0017] In this technical solution, the first end plate is a low-alloy structural steel end plate, and the surface of the keyway is treated with high-frequency quenching, with a surface hardness greater than 50HRC, thereby improving wear resistance and impact resistance.

[0018] In some technical solutions, the second end plate can optionally be a low-alloy structural steel end plate, and the surface of the key is treated with high-frequency quenching to achieve a surface hardness greater than 50 HRC.

[0019] In this technical solution, the second end plate is a low-alloy structural steel end plate, and the surface of the key is treated with high-frequency quenching, with a surface hardness greater than 50HRC, thereby improving wear resistance and impact resistance.

[0020] In some technical solutions, the spiral drum of the coal mining machine may optionally include a toothed seat connected to the second end plate.

[0021] In this technical solution, the spiral drum of the coal mining machine also includes a toothed seat, which is welded to the second end plate. Through the keyway and key of the second end plate, the toothed seat can be disassembled as a whole with the second end plate, facilitating maintenance or replacement of worn parts and significantly reducing maintenance time.

[0022] In some technical solutions, the spiral drum of the coal mining machine may optionally include: cutting teeth, which are disposed on a tooth holder.

[0023] In this technical solution, the spiral drum of the coal mining machine also includes cutting teeth, which are mounted on a tooth holder. The cutting teeth transmit the cutting force to the drum and the main body of the coal mining machine through the tooth holder.

[0024] To achieve the second objective of this application, the technical solution of the second aspect of this application provides a coal mining machine, including: a coal mining machine spiral drum as described in any of the technical solutions of the first aspect of this application.

[0025] The coal mining machine provided by the technical solution of this application includes the coal mining machine spiral drum as described in any of the technical solutions of the first aspect of this application, and therefore has all the beneficial effects of the coal mining machine spiral drum as described in any of the technical solutions of the first aspect of this application, which will not be repeated here.

[0026] Additional aspects and advantages of embodiments of this application will become apparent in the following description or may be learned by practice of embodiments of this application. Attached Figure Description

[0027] Figure 1 This is a schematic front view of the spiral drum of a coal mining machine according to an embodiment provided in this application;

[0028] Figure 2 This is a schematic diagram of the main structure of a first end plate according to an embodiment provided in this application;

[0029] Figure 3 This is a schematic diagram of the main structure of the second end plate according to an embodiment provided in this application.

[0030] in, Figures 1 to 3 The correspondence between the reference numerals and component names in the attached drawings is as follows:

[0031] 10: Coal mining machine spiral drum; 110: Drum body; 120: First end plate; 122: Keyway; 124: First through hole; 130: Second end plate; 132: Key; 134: Second through hole; 140: Connector; 150: Gear seat; 160: Cutting tooth. Detailed Implementation

[0032] To better understand the above-mentioned objects, features, and advantages of the embodiments according to this application, the embodiments according to this application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the features of the embodiments according to this application can be combined with each other.

[0033] Numerous specific details are set forth in the following description in order to provide a full understanding of the embodiments according to this application. However, the embodiments according to this application may also be implemented in other ways different from those described herein. Therefore, the scope of protection provided by the embodiments according to this application is not limited to the specific embodiments disclosed below.

[0034] The following reference Figures 1 to 3 Some embodiments provided in this application are described.

[0035] The drum is the actuator in the coal mining machine, consuming 80% of the total power of the coal mining machine. The main functions of the drum are coal dropping and loading. During the cutting process, the cutting teeth on the end plate of the drum are in a closed cutting state, without the pressure and tension effect of the coal wall. The force is relatively large, and the tooth seat is prone to failure. Under harsh working conditions, the cutting teeth wear out quickly. If the cutting teeth are not replaced in time, the tooth seat will wear out. After the tooth seat wears out, the drum will fail, reducing the service life of the drum.

[0036] like Figure 1 , Figure 2 and Figure 3 As shown, a coal mining machine spiral drum 10 according to an embodiment of this application includes a drum body 110, a first end plate 120, a second end plate 130, and a connecting member 140. Specifically, the first end plate 120 is connected to the drum body 110, and a plurality of keyways 122 are provided along the circumferential direction of the first end plate 120. The second end plate 130 is embedded in the outer surface of the first end plate 120 and is detachably connected to the first end plate 120. A plurality of keys 132 are provided on the inner hole of the second end plate 130, and the keys 132 correspond one-to-one with the keyways 122 and cooperate with the keyways 122. The connecting member 140 is used to connect the first end plate 120 and the second end plate 130.

[0037] The auger drum 10 of the coal mining machine provided in this embodiment includes a drum body 110, a first end plate 120, a second end plate 130, and a connecting member 140. The drum body 110 serves as the main structure of the auger drum, supporting and connecting other components. The first end plate 120 is fixedly connected to the drum body 110, and has multiple keyways 122 along its circumference. The second end plate 130 is embedded in the outer surface of the first end plate 120 and detachably connected to it. The inner hole of the second end plate 130 has a key 132 corresponding to the keyways 122. The cooperation between the key 132 and the keyways 122 serves both a positioning function and transmits torque to withstand shear force, enabling quick disassembly and assembly of the end plates for easy maintenance or replacement of worn parts. The connecting member 140 is used to fix the first end plate 120 and the second end plate 130. The end plate is divided into two parts: one part is welded to the cylinder body, and the other part is welded with a toothed seat 150 as an accessory. The accessory can be directly replaced without welding downhole, thus extending the service life of the drum.

[0038] In some embodiments, the keyway 122 is optionally provided with a first through hole 124 in the middle, and the key 132 is provided with a second through hole 134 in the center. The second through hole 134 and the first through hole 124 are used to pass through the connector 140, thereby connecting the first end plate 120 and the second end plate 130.

[0039] In some embodiments, optionally, the number of keyways 122 is 4 to 8, and the diameter of the second through hole 134 is greater than or equal to 35 mm and less than or equal to 45 mm. Specifically, the number of keyways 122 is 6, and the diameter of the second through hole 134 is 40 mm. The 6 keyways 122 can evenly transmit the high torque of the coal mining machine cutting section, avoiding hub deformation or key 132 shearing failure caused by stress concentration in a single keyway 122. The multi-keyway 122 design can still maintain connection stability when individual keyways 122 wear, which is especially suitable for high vibration conditions in underground coal mines.

[0040] In some embodiments, optionally, a plurality of keyways 122 are evenly arranged along the circumferential direction of the first end plate 120, and the key 132 is interference-fitted with the keyway 122, which can both play a positioning role and transmit torque and withstand shear force.

[0041] In some embodiments, the first through hole 124 may optionally include a threaded hole, which is an M36 threaded hole; the connector 140 includes a bolt, and the threaded hole and the bolt can provide higher connection strength, which is suitable for the high vibration conditions of the coal mining machine spiral drum 10, prevents the key 132 and the keyway 122 from loosening due to vibration, facilitates the disassembly of the second end plate 130 during maintenance, and replaces worn parts, which meets the requirements of modular design.

[0042] In some embodiments, the first end plate 120 is optionally a low-alloy structural steel end plate, and the surface of the keyway 122 is subjected to high-frequency quenching treatment, with a surface hardness greater than 50HRC, thereby improving wear resistance and impact resistance.

[0043] In some embodiments, the second end plate 130 is optionally a low-alloy structural steel end plate, and the surface of the key 132 is subjected to high-frequency quenching treatment, with a surface hardness greater than 50HRC, thereby improving wear resistance and impact resistance.

[0044] In some embodiments, the auger drum 10 of the coal mining machine may optionally include a toothed seat 150, which is connected to the second end plate 130. The toothed seat 150 can be disassembled as a whole with the second end plate 130 through the keyway 122 of the second end plate 130 engaging with the key 132, which facilitates maintenance or replacement of worn parts and significantly reduces maintenance time.

[0045] In some embodiments, the coal mining machine spiral drum 10 may optionally include cutting teeth 160, which are disposed on tooth base 150 and transmit cutting force to the drum and the coal mining machine body through tooth base 150.

[0046] An embodiment of the second aspect of this application provides a coal mining machine, including a coal mining machine spiral drum 10 as described in any of the above embodiments.

[0047] The coal mining machine provided according to the embodiments of this application includes the coal mining machine spiral drum 10 as described in any of the above embodiments, and thus has all the beneficial effects of the coal mining machine spiral drum 10 as described in any of the above embodiments, which will not be repeated here.

[0048] like Figures 1 to 3 As shown, the coal mining machine spiral drum 10 according to a specific embodiment of this application is designed with a detachable end plate by means of mortise and tenon structure and bolt engagement. The end plate is divided into two parts, one part of which is welded to the drum body, and the other part is welded with a tooth seat 150 as an accessory. Without the need for welding underground, the accessory can be directly replaced, thereby improving the service life of the drum.

[0049] Currently, the spiral drum 10 of the coal mining machine uses an integral end plate. The main problem with using a split end plate is unreliable connection. The drum is subjected to significant forces during operation, and an unreliable connection can easily lead to failure. This embodiment primarily uses a mortise and tenon structure to withstand shear forces, with a reliable connection achieved through a spiral joint. Six keys 132, evenly distributed around the circumference, with a small interference fit, serve both positioning and torque transmission to withstand shear forces.

[0050] 1. The first end plate 120 is first cut into six keyways 122 evenly distributed in the circumferential direction. The surface of the groove is subjected to high frequency quenching with a hardness greater than 50HRC. Then the groove is precision machined to ensure installation accuracy. Six M36 threaded holes are drilled in the middle of the groove. The end plate is pressed into a disc shape by the roller end plate pressing mold and then welded to the roller body 110.

[0051] 2. The second end plate 130 is first cut into six keys 132 in the inner hole. The surface of the keyway 122 is subjected to high frequency quenching with a hardness greater than 50HRC. The dimensions of the keyway 122 are precision machined to ensure installation accuracy. A 40mm hole is drilled in the center of the key 132. The keyway is pressed using a roller blade pressing mold. The tooling is then toothed using a roller tooth seat assembly. Finally, the tooth seat assembly is welded.

[0052] 3. Assemble the end plates by fitting the keyway 122 of the first end plate 120 and the key 132 of the second end plate 130 together, and then connect them with 6 M36 bolts, ensuring that the required torque is applied to complete the assembly and installation of the end plates.

[0053] Working principle:

[0054] This embodiment is mainly used for rapid underground repair of the spiral drum of a coal mining machine. After the end plate tooth seat fails, the conventional drum needs to be replaced as a whole or brought to the surface for repair. With the detachable end plate drum, it can be quickly replaced underground, extending the drum's life and improving the mine's coal mining efficiency.

[0055] The working principle is explained in detail below:

[0056] When the end plate gear seat needs to be replaced downhole, first remove the six bolts, weld two bolts onto the second end plate 130 for hoisting, remove the second end plate 130, and then replace it with a new end plate.

[0057] When the drum is working underground, the circumferential force is large and it is mainly subjected to shear force. In this embodiment, the mortise and tenon structure is used to withstand the shear force through the cooperation of six keyways 122 and keys 132 evenly distributed around the circumference. The bolt connection only serves the connection function and is not subjected to shear force.

[0058] This embodiment mainly designs a spiking drum 10 for a coal mining machine with a detachable end plate. The shearing force of the drum is transmitted through mortise and tenon joints, and the connection is achieved by tightening six M36 bolts.

[0059] The surfaces of the keyway 122 and key 132 of the first end plate 120 and the second end plate 130 are subjected to high-frequency quenching to achieve a hardness greater than 50 HRC.

[0060] In this embodiment, the end plate is made of low-alloy structural steel.

[0061] The design of the detachable end plate drum allows for rapid repair of failed toothed seats 150 downhole, extending the drum's service life.

[0062] In summary, the beneficial effects of the embodiments of this application are as follows:

[0063] 1. The roller end plate is designed to be detachable, allowing for quick replacement of the end plate tooth seat.

[0064] 2. The detachable end plate is reliably connected by mortise and tenon structure and high-strength bolt connection.

[0065] 3. Perform high-frequency quenching on the keyway and key surface to ensure a hardness greater than 50 HRC, thus guaranteeing hardness.

[0066] In the embodiments according to this application, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance; the term "multiple" refers to two or more unless otherwise expressly defined. The terms "install," "connect," "link," and "fix" should be interpreted broadly. For example, "connect" can be a fixed connection, a detachable connection, or an integral connection; "link" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments according to the specific circumstances.

[0067] In the description of the embodiments according to this application, it should be understood that the terms "upper", "lower", "left", "right", "front", "rear", 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 the embodiments according to this application and simplifying the description, and do not indicate or imply that the device or unit 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 the embodiments according to this application.

[0068] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example according to this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0069] The above are merely preferred embodiments according to this application and are not intended to limit the embodiments according to this application. For those skilled in the art, various modifications and variations can be made to the embodiments according to this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the embodiments according to this application should be included within the protection scope of the embodiments according to this application.

Claims

1. A spiral drum for a coal mining machine, characterized in that, include: Drum body (110); The first end plate (120) is connected to the roller body (110), and a plurality of keyways (122) are provided along the circumferential direction of the first end plate (120); The second end plate (130) is embedded on the outer surface of the first end plate (120) and is detachably connected to the first end plate (120). The inner hole of the second end plate (130) is provided with a plurality of keys (132), and the keys (132) correspond one-to-one with the keyways (122) and cooperate with the keyways (122). A connector (140) is used to connect the first end plate (120) and the second end plate (130).

2. The spiral drum of the coal mining machine according to claim 1, characterized in that, The keyway (122) has a first through hole (124) in the middle, and the key (132) has a second through hole (134) in the center. The second through hole (134) and the first through hole (124) are used to pass through the connector (140).

3. The spiral drum of the coal mining machine according to claim 2, characterized in that, The number of keyways (122) is 4 to 8, and the diameter of the second through hole (134) is greater than or equal to 35 mm and less than or equal to 45 mm.

4. The spiral drum of the coal mining machine according to claim 1, characterized in that, The multiple keyways (122) are evenly arranged along the circumferential direction of the first end plate (120), and the key (132) is interference-fitted with the keyway (122).

5. The spiral drum of the coal mining machine according to claim 2, characterized in that, The first through hole (124) includes a threaded hole, which is an M36 threaded hole; The connector (140) includes bolts.

6. The spiral drum of the coal mining machine according to any one of claims 1 to 5, characterized in that, The first end plate (120) is a low alloy structural steel end plate, and the surface of the keyway (122) is treated by high frequency quenching, with a surface hardness greater than 50HRC.

7. The spiral drum of the coal mining machine according to any one of claims 1 to 5, characterized in that, The second end plate (130) is a low alloy structural steel end plate, and the surface of the key (132) is subjected to high frequency quenching treatment, with a surface hardness greater than 50HRC.

8. The spiral drum of the coal mining machine according to any one of claims 1 to 5, characterized in that, Also includes: The toothed seat (150) is connected to the second end plate (130).

9. The spiral drum of the coal mining machine according to claim 8, characterized in that, Also includes: Cutting tooth (160), the cutting tooth (160) is disposed on the tooth seat (150).

10. A coal mining machine, characterized in that, include: The spiral drum of the coal mining machine as described in any one of claims 1 to 9.

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