Coal mining machine clutch mechanism, coal mining machine and method of using the clutch mechanism

Abstract

The present invention discloses a clutch mechanism for a coal mining machine, a coal mining machine, and a method for using the clutch mechanism, comprising a cutting motor, a flexible shaft, a positioning assembly, a pull rod, and a pushing assembly, wherein the flexible shaft is disposed in the cutting motor and is movable along its axial direction and has a transmission position and a separation position; the positioning assembly is detachably disposed on the cutting motor; the pull rod is assembled to the positioning assembly with an adjustable axial position, the extension direction of the pull rod is consistent with the extension direction of the flexible shaft, and one end of the pull rod is rotatably connected to the flexible shaft; the pushing assembly is connected to the positioning assembly, the pushing assembly includes a pushing piece, the pushing piece is suitable for abutting against the other end of the pull rod, and the pushing piece can move along the axial direction of the pull rod relative to the positioning assembly. The clutch mechanism of the present invention can reduce the failure rate of the coal mining machine, ensure the continuity of production, and improve production efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of coal shearers, and in particular to a clutch mechanism for a coal shearer, a coal shearer, and a method for using the clutch mechanism of the coal shearer. Background Art

[0002] Coal shearers are a key piece of equipment used in coal mining, primarily responsible for cutting coal walls. For coal mining companies, the performance of these shearers directly impacts production costs and efficiency. However, existing technologies for shearers suffer from a high failure rate, reducing production efficiency and hindering the continuity of coal mine production. Summary of the Invention

[0003] The present invention aims to solve one of the technical problems in the related art at least to a certain extent.

[0004] To this end, an embodiment of the present invention provides a clutch mechanism for a coal shearer, which can reduce the failure rate of the coal shearer, ensure the continuity of production, and improve production efficiency.

[0005] The embodiment of the present invention further provides a coal shearer using the above-mentioned clutch mechanism for coal shearers.

[0006] The embodiment of the present invention further provides a method for using the clutch mechanism of the above-mentioned coal mining machine.

[0007] The clutch mechanism for a coal mining machine according to an embodiment of the present invention comprises:

[0008] Cutting motor;

[0009] a flexible shaft disposed in the cutting motor and movable along its axial direction and having a transmission position and a separation position, wherein the flexible shaft is engaged between the cutting motor and the cutting disc and the separation position wherein the flexible shaft is engaged and separated from the cutting motor and the cutting disc;

[0010] a positioning assembly, the positioning assembly being detachably mounted on the cutting motor;

[0011] A pull rod, the axial position of which is adjustable and assembled to the positioning assembly, the extension direction of the pull rod being consistent with the extension direction of the flexible shaft, and one end of the pull rod being rotatably connected to the flexible shaft, the pull rod being suitable for pushing and pulling the flexible shaft to realize switching between the transmission position and the separation position of the flexible shaft;

[0012] The pushing assembly is connected to the positioning assembly, and the pushing assembly includes a pushing piece, which is suitable for abutting against the other end of the pull rod, and the pushing piece can move axially along the pull rod relative to the positioning assembly to adjust the size of the pushing force of the pull rod.

[0013] The clutch mechanism for a coal shearer according to the embodiment of the present invention can reduce the failure rate of the coal shearer, ensure the continuity of production, and improve production efficiency.

[0014] In some embodiments, the push assembly includes:

[0015] A frame body, the frame body is connected to the positioning assembly, the push member is threadedly assembled with the frame body and is axially movable relative to the frame body;

[0016] A nut member is threadedly assembled on the outer peripheral side of the pushing member, and the nut member is suitable for abutting against the frame to fix the adjusted pushing member.

[0017] In some embodiments, the pushing member includes:

[0018] The first piece is threadedly matched with the frame body, and the nut piece is threadedly assembled on the outer peripheral side of the first piece.

[0019] a second member connected to one end of the first member facing the pull rod, the second member being axially movable relative to the first member and adapted to abut against the pull rod;

[0020] An elastic member acts between the first member and the second member, and is suitable for buffering the force of the pull rod on the second member and resetting the second member.

[0021] In some embodiments, one of the first and second members is provided with a guide groove, and the other is provided with a guide portion, the guide groove extends along the axial direction of the pull rod, the guide portion guides and slides in the guide groove, the elastic member is assembled in the guide groove, and one end of the elastic member abuts against the bottom of the guide groove, and the other end of the elastic member abuts against the guide portion.

[0022] In some embodiments, the frame body is provided with a protrusion, the protrusion protruding from the surface of the frame body along the axial direction of the pull rod, and the pushing member is threadedly assembled on the protrusion.

[0023] In some embodiments, the frame is provided with an annular portion, the protrusion is provided at the center of the frame, the annular portion is provided at the edge of the frame and surrounds the outer peripheral side of the protrusion, the annular portion is provided with a plurality of stepped holes, and the plurality of stepped holes are arranged at intervals along the extension direction of the annular portion, the frame is connected to the positioning assembly through a plurality of fasteners, and the stepped holes are suitable for the fasteners to pass through and for hiding the fasteners.

[0024] In some embodiments, the push assembly includes:

[0025] a plurality of first washers, wherein the plurality of first washers are clamped and fixed between ends of the plurality of fasteners and the positioning assembly;

[0026] and / or, a second washer, wherein the second washer is clamped between the nut member and the frame.

[0027] In some embodiments, the pushing member is provided with a stopping portion, which is provided at the end of the pushing member away from the pull rod, and the stopping portion is suitable for driving the nut member to rotate and can stop the nut member.

[0028] The coal shearer according to the embodiment of the present invention includes the clutch mechanism for the coal shearer as described in any of the above embodiments.

[0029] The method for using the clutch mechanism according to the embodiment of the present invention comprises the following steps:

[0030] S1: Switch the flexible shaft to the transmission position and fix the pushing assembly on the positioning assembly;

[0031] S2: Start the cutting disc of the coal mining machine;

[0032] S3: moving the pushing member of the pushing assembly to adjust the acting force between the pushing member and the pull rod and the bearing position between the pull rod and the flexible shaft;

[0033] S4: After the cutting disc runs stably, the pushing member is fixed;

[0034] S5: After the cutting operation is completed, the pushing assembly is removed and the flexible shaft is switched to the separation position. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a schematic cross-sectional view of the overall structure of a clutch mechanism for a coal mining machine according to an embodiment of the present invention.

[0036] Figure 2 yes Figure 1 Schematic diagram of the middle push assembly.

[0037] Figure 3 2 is a schematic diagram of a pushing assembly according to another embodiment of the present invention.

[0038] Figure 4 yes Figure 3 A local enlarged schematic diagram of point A in the middle.

[0039] Reference numerals:

[0040] Cutting motor 1;

[0041] Flexible shaft 2;

[0042] Positioning assembly 3; positioning cover 31; positioning plate 32;

[0043] Tie rod 4;

[0044] Bearing 5;

[0045] Base 6;

[0046] Pushing assembly 7; first washer 71; pushing member 72; stopping portion 721; first member 722; second member 723; guide groove 724; guide portion 725; frame 73; protrusion 731; annular portion 732; stepped hole 733; nut member 74; second washer 75; elastic member 76;

[0047] Fastener 8. DETAILED DESCRIPTION

[0048] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0049] like Figures 1 to 4 As shown, the clutch mechanism for a coal mining machine according to an embodiment of the present invention includes a cutting motor 1 , a flexible shaft 2 , a positioning assembly 3 , a pull rod 4 and a pushing assembly 7 .

[0050] The cutting motor 1 serves as a power source to drive the cutting disc. The flexible shaft 2 can be fixedly mounted to the cutting motor 1 and is movable along its axial direction. The flexible shaft 2 has a transmission position and a separation position. In the transmission position, the flexible shaft 2 engages and disengages between the cutting motor 1 and the cutting disc. In the separation position, the flexible shaft 2 engages and disengages with the cutting motor 1 and the cutting disc.

[0051] For example, the flexible shaft 2 can be assembled in the cutting motor 1, and the flexible shaft 2 extends generally in the left-right direction, and the flexible shaft 2 can reciprocate in the left-right direction relative to the cutting motor 1. When the flexible shaft 2 moves to the left, the flexible shaft 2 can be switched to the transmission position. At this time, the left end of the flexible shaft 2 can be connected to the transmission shaft of the cutting motor 1, and the meshing teeth on the outer peripheral side of the flexible shaft 2 can mesh with the teeth on the drive shaft of the cutting disk, thereby achieving a transmission effect.

[0052] When the flexible shaft 2 moves to the right, the flexible shaft 2 can be switched to the separation position. At this time, the left end of the flexible shaft 2 can be separated from the transmission shaft of the cutting motor 1, and the meshing teeth on the outer peripheral side of the flexible shaft 2 can also be engaged and separated from the drive shaft of the cutting disk, thereby preventing transmission.

[0053] The positioning assembly 3 is detachably mounted on the cutting motor 1. For example, Figure 1As shown, the positioning assembly 3 may include a positioning cover 31 and a positioning plate 32. Both the positioning cover 31 and the positioning plate 32 may be disc-shaped. The positioning cover 31 may be connected and fixed to the cutting motor 1 by bolts, etc., and the positioning plate 32 may also be connected and fixed to the positioning cover 31 by bolts, etc.

[0054] The pull rod 4 is assembled on the positioning assembly 3 with an adjustable axial position. The extension direction of the pull rod 4 is consistent with the extension direction of the flexible shaft 2, and one end of the pull rod 4 is rotatably connected to the flexible shaft 2. The pull rod 4 is suitable for pushing and pulling the flexible shaft 2 to realize the switching of the transmission position and the separation position of the flexible shaft 2.

[0055] For example, Figure 1 As shown, both the positioning cover 31 and the positioning plate 32 may be provided with through holes, which generally extend in the left-right direction. The pull rod 4 may fit in the through holes of the positioning cover 31 and the positioning plate 32, and the pull rod 4 may move in the left-right direction. The left end of the pull rod 4 may be rotatably assembled with the right end of the flexible shaft 2. The right end of the flexible shaft 2 may be provided with an assembly groove, into which the left end of the pull rod 4 may be inserted. A bearing 5 and a baffle may be provided between the pull rod 4 and the flexible shaft 2, wherein the bearing 5 is sleeved on the outer circumference of the pull rod 4. The baffle may be connected and fixed to the flexible shaft 2, surrounding the outer circumference of the pull rod 4. The baffle is located on the right side of the bearing 5 and serves to stop the bearing 5 in the assembly groove.

[0056] The pushing assembly 7 is connected to the positioning assembly 3, and the pushing assembly 7 includes a pushing piece 72. The pushing piece 72 is suitable for abutting against the other end of the pull rod 4, and the pushing piece 72 can move axially along the pull rod 4 relative to the positioning assembly 3 to adjust the pushing force of the pull rod 4.

[0057] For example, the push assembly 7 may include a frame 73 that is fixed to the right side of the positioning plate 32 by bolts or the like, and a push member 72 that is assembled on the frame 73 and is adjustable in the left and right directions. When in use, the push member 72 can abut against the right end of the pull rod 4, thereby limiting the axial position of the pull rod 4.

[0058] Optionally, the positioning plate 32 may include a sleeve portion, which may be provided on the right side of the positioning plate 32. A base 6 may be mounted within the sleeve portion. The base 6 may be movable in the left-right direction relative to the sleeve portion, and the right end of the pull rod 4 may be fixedly connected to the base 6. During use, the pull rod 4 may be moved by pulling the base 6, thereby enhancing the guiding performance of the movement of the pull rod 4.

[0059] The clutch mechanism for the coal mining machine in the embodiment of the present invention is provided with a pushing assembly 7, which can stop the pull rod 4, thereby limiting the axial movement of the pull rod 4, avoiding the situation where the pull rod 4 is easily moved outward during the operation of the coal mining machine, and further avoiding the situation where the flexible shaft 2 will move axially after the pull rod 4 moves outward, thereby ensuring the accuracy of the axial engagement between the flexible shaft 2 and the cutting disk, and can improve the service life of the gear of the flexible shaft 2, and can also reduce the failure rate of the coal mining machine, thereby ensuring the continuity of production and improving production efficiency.

[0060] In addition, the stopping effect of the pushing assembly 7 can also be achieved by limiting the bearing 5 between the flexible shaft 2 and the pull rod 4, that is, the distance between the bearing 5 and the flexible shaft 2 can be limited within the allowable range, thereby achieving precise adjustment of the clearance of the bearing 5, ensuring the stable operation of the bearing 5, extending the service life of the bearing 5, and further reducing the failure rate.

[0061] In some embodiments, the pushing assembly 7 includes a frame body 73 and a nut member 74. The frame body 73 is connected to the positioning assembly 3. The pushing member 72 is threadedly assembled with the frame body 73 and can move axially relative to the frame body 73. The nut member 74 is threadedly assembled on the outer peripheral side of the pushing member 72. The nut member 74 is suitable for abutting against the frame body 73 to fix the adjusted pushing member 72.

[0062] For example, Figure 1 and Figure 2 As shown, the frame 73 can be disc-shaped and can be fixed to the right side of the positioning plate 32 by bolts. A threaded hole can be provided in the center of the frame 73, and the outer periphery of the push member 72 can be provided with external threads, and the push member 72 can be threadedly assembled into the threaded hole of the frame 73. The nut member 74 has a threaded hole and can be assembled on the outer periphery of the push member 72.

[0063] During use, the push member 72 can be rotated to adjust its position in the left and right directions, thereby adjusting the force applied by the push member 72 to the pull rod 4, thereby limiting the pull rod 4 and the bearing 5, and maintaining a certain preload between the bearing 5 and the flexible shaft 2. After the push member 72 is adjusted into place, the nut member 74 can be rotated, and the nut member 74 can be moved to the left and fit with the frame 73. Through the threaded cooperation between the nut member 74 and the push member 72, and the threaded cooperation between the frame 73 and the push member 72, the push member 72 can be self-locked, thereby fixing the push member 72.

[0064] Therefore, while satisfying the main functions of the pushing member 72, the structure of the pushing assembly 7 can be simplified, meeting the use requirements of underground production.

[0065] In some embodiments, the pushing member 72 includes a first member 722, a second member 723 and an elastic member 76. The first member 722 is threadedly engaged with the frame body 73. The nut member 74 is threadedly assembled on the outer peripheral side of the first member 722. The second member 723 is connected to one end of the first member 722 toward the pull rod 4. The second member 723 can move axially relative to the first member 722, and the second member 723 is suitable for stopping with the pull rod 4. The elastic member 76 acts between the first member 722 and the second member 723. The elastic member 76 is suitable for buffering the force of the pull rod 4 on the second member 723 and resetting the second member 723.

[0066] like Figure 3 As shown, the first piece 722 can be rod-shaped, the external thread of the pushing piece 72 can be arranged on the outer peripheral side of the first piece 722, the first piece 722 can be engaged with the threaded hole of the frame 73, the second piece 723 can be arranged at the left end of the first piece 722, and the second piece 723 can be movable in the left and right directions relative to the first piece 722. For example, the second piece 723 can be sleeve-shaped, the second piece 723 can be sleeved on the left end of the first piece 722 and movable relative to the first piece 722.

[0067] The elastic member 76 may be a spring, and the elastic member 76 may be connected between the first member 722 and the second member 723 , wherein the left end of the elastic member 76 may be connected to the second member 723 , and the right end of the elastic member 76 may be connected to the first member 722 .

[0068] During use, the pull rod 4 will move outward, and the elastic member 76 has a buffering and energy storage effect, thereby buffering the movement of the pull rod 4, avoiding the rigid contact between the pull rod 4 and the push member 72, and extending the service life of the push assembly 7. In addition, it can also provide a buffer space for the movement of the bearing 5, thereby improving the flexibility of the bearing 5 and extending the service life of the bearing 5.

[0069] In some embodiments, one of the first piece 722 and the second piece 723 is provided with a guide groove 724, and the other one is provided with a guide portion 725, the guide groove 724 extends along the axial direction of the pull rod 4, the guide portion 725 guides and slides in the guide groove 724, the elastic piece 76 is assembled in the guide groove 724, and one end of the elastic piece 76 stops at the bottom of the guide groove 724, and the other end of the elastic piece 76 stops at the guide portion 725.

[0070] like Figure 4As shown, the first member 722 can be rod-shaped, the second member 723 can be nail-shaped, and the guide slot 724 can be provided at the left end of the first member 722. The guide slot 724 can be a blind slot and can extend in the left-right direction. The guide portion 725 can be integrally formed with the second member 723 and can be guided and fitted within the guide slot 724. The elastic member 76 can be installed within the guide slot 724, with the left end of the elastic member 76 abutting against the right end surface of the guide portion 725, and the right end of the elastic member 76 abutting against the bottom surface of the guide slot 724. This can limit the elastic member 76, allowing it to deform only in the left-right direction, and can also conceal the elastic member 76, improving the compactness of the assembly.

[0071] Optionally, a guide column portion is provided on the second piece 723, such as Figure 4 As shown, the guide column portion can be integrally arranged with the guide portion 725, the radial dimension of the guide column portion can be smaller than the radial dimension of the guide portion 725, and a portion of the elastic member 76 can be sleeved on the outer peripheral side of the guide column portion, thereby further improving the compactness of the assembly and enhancing the guiding effect.

[0072] In some embodiments, the frame 73 is provided with a protrusion 731, which protrudes from the surface of the frame 73 along the axial direction of the pull rod 4, and the push member 72 is threadedly assembled on the protrusion 731. Figure 2 As shown, the protrusion 731 can be integrally formed with the frame body 73. The protrusion 731 can be located at the center of the frame body 73 and on the left side of the frame body 73. A threaded hole can be provided in the protrusion 731 and can pass through the protrusion 731 in the left-right direction. The push member 72 can be threadedly assembled in the protrusion 731. The provision of the protrusion 731 can increase the length of the threaded hole, thereby increasing the fixing effect of the push member 72 and the structural strength of the assembly.

[0073] In some embodiments, the frame 73 is provided with an annular portion 732, the protrusion 731 is provided at the center of the frame 73, the annular portion 732 is provided at the edge of the frame 73 and surrounds the outer peripheral side of the protrusion 731, and the annular portion 732 is provided with a plurality of stepped holes 733, and the plurality of stepped holes 733 are arranged at intervals along the extension direction of the annular portion 732. The frame 73 is connected to the positioning assembly 3 through a plurality of fasteners 8, and the stepped holes 733 are suitable for allowing the fasteners 8 to pass through and for hiding the fasteners 8.

[0074] For example, Figure 2As shown, the frame body 73 can be disc-shaped, and the annular portion 732 can be provided at the circumferential edge of the frame body 73, and the annular portion 732 can be located on the left side of the frame body 73. The annular portion 732 can be provided with a plurality of stepped holes 733, and the plurality of stepped holes 733 are arranged at equal intervals along the circumferential direction of the annular portion 732. The stepped holes 733 include a large hole section and a small hole section, wherein the large hole section is located to the right of the small hole section. The frame body 73 can be connected and fixed to the positioning plate 32 by a plurality of fasteners 8, and the plurality of fasteners 8 pass through the plurality of stepped holes 733 in a one-to-one correspondence. The provision of the annular portion 732 can, on the one hand, ensure the structural strength when assembled with the fasteners 8, and on the other hand, can increase the space between the frame body 73 and the positioning plate 32, thereby meeting the installation requirements of the base 6.

[0075] The fasteners 8 can be long bolts, and each fastener 8 can simultaneously connect and fix the positioning cover 31, the positioning plate 32, and the frame 73. The ends of the fasteners 8 can be hidden in the large hole section of the stepped hole 733, thereby improving the compactness of the assembly and preventing the fasteners 8 from loosening easily.

[0076] In some embodiments, the push assembly 7 includes a plurality of first washers 71, which are clamped and fixed between the ends of the plurality of fasteners 8 and the positioning assembly 3. Figure 1 As shown, multiple first washers 71 can be assembled in multiple stepped holes 733 of the frame 73, and each first washer 71 can be clamped between the step surface in the stepped hole 733 and the end head of the fastener 8, thereby enhancing the assembly strength of the fastener 8.

[0077] In some embodiments, as Figure 2 As shown, the second washer 75 of the push assembly 7 is clamped between the nut member 74 and the frame body 73. Thereby, the reverse force can be increased and self-locking can be achieved, and the fixing effect of the nut member 74 can be enhanced.

[0078] In some embodiments, the push member 72 is provided with a stopper 721, which is provided at the end of the push member 72 away from the pull rod 4. The stopper 721 is suitable for driving the nut member 74 to rotate and can stop the nut member 74. Figure 2 As shown, the stop portion 721 can be integrally formed at the right end of the pushing member 72. When in use, the pushing member 72 can be driven to rotate by rotating the stop portion 721. Secondly, the stop portion 721 can also form a stop limit for the nut member 74, thereby preventing the nut member 74 from falling off from the pushing member 72.

[0079] A coal mining machine according to an embodiment of the present invention will be described below.

[0080] A coal shearer according to an embodiment of the present invention includes a clutch mechanism for the coal shearer. The clutch mechanism may be the clutch mechanism described in the above embodiments. The coal shearer may be a sawing, planing, drilling, or milling type. The clutch mechanism of the coal shearer according to an embodiment of the present invention can reduce the failure rate of the coal shearer and improve operational continuity.

[0081] The following describes a method for using the clutch mechanism according to an embodiment of the present invention.

[0082] The method for using the clutch mechanism according to the embodiment of the present invention comprises the following steps:

[0083] S1: Switch the flexible shaft 2 to the transmission position and secure the push assembly 7 to the positioning assembly 3. For example, first drive the base 6 to the left, directly aligning the base 6 with the positioning cover 31. The pull rod 4 will move synchronously with the base 6, and the flexible shaft 2 can be switched to the transmission position under the action of the pull rod 4. Then, the frame 73 of the push assembly 7 can be installed and secured to the positioning plate 32.

[0084] S2: Start the cutting disc of the coal mining machine. For example, the cutting motor 1 can be driven to operate at low power, thereby improving the safety of the operation. The cutting motor 1 can drive the cutting disc through the transmission of the flexible shaft 2.

[0085] S3: Move the pushing member 72 of the pushing assembly 7 to adjust the force between the pushing member 72 and the pull rod 4, and the position of the bearing 5 between the pull rod 4 and the flexible shaft 2. Specifically, the pushing member 72 can be rotated by a wrench, etc., and the pushing member 72 can be moved to the left and can be in contact with the right end of the pull rod 4. The rotation adjustment position of the pushing member 72 can be quantitatively adjusted. For example, the overall length of the pushing member 72 can be certain. After the pushing member 72 is rotated to the left and moved into position, the left movement distance of the pushing member 72 can be determined by measuring the length of the right side of the pushing member 72 on the frame 73, thereby achieving intuitive monitoring of the force between the pushing member 72 and the pull rod 4, and the position adjustment of the bearing 5 between the pull rod 4 and the flexible shaft 2, which facilitates adjustment into place.

[0086] S4: After the cutting disc is running stably, the push member 72 is fixed. For example, the cutting disc can be driven to run for a period of time. If the cutting disc runs stably and without any obstructions during this period of time, the push member 72 can then be installed and fixed by rotating the nut.

[0087] S5: After the cutting operation is completed, the pushing assembly 7 is removed and the flexible shaft 2 is switched to the separation position, thereby avoiding the situation where an accidental start-up may easily cause a safety accident.

[0088] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0089] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0090] In the present invention, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0091] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0092] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples without contradiction.

[0093] Although the above embodiments have been shown and described, it is understood that the above embodiments are illustrative and are not to be construed as limitations on the present invention. Changes, modifications, substitutions and variations of the above embodiments by those skilled in the art are all within the scope of protection of the present invention.

Claims

1. A clutch mechanism for a coal mining machine, characterized in that: include: Cutting motor; a flexible shaft disposed in the cutting motor and movable along its axial direction and having a transmission position and a separation position, wherein the flexible shaft is engaged between the cutting motor and the cutting disc and the separation position wherein the flexible shaft is engaged and separated from the cutting motor and the cutting disc; a positioning assembly, the positioning assembly being detachably mounted on the cutting motor; A pull rod, the axial position of which is adjustable and assembled to the positioning assembly, the extension direction of the pull rod being consistent with the extension direction of the flexible shaft, and one end of the pull rod being rotatably connected to the flexible shaft, the pull rod being suitable for pushing and pulling the flexible shaft to realize switching between the transmission position and the separation position of the flexible shaft; The positioning assembly includes a positioning cover and a positioning plate. The positioning plate includes a sleeve portion. The sleeve portion is provided on the right side of the positioning plate. A base is assembled in the sleeve portion. The base moves in the left and right directions relative to the sleeve portion. The right end of the pull rod is connected and fixed to the base. A pushing assembly connected to the positioning assembly, comprising a pushing piece adapted to abut against the other end of the pull rod, and movable relative to the positioning assembly along the axial direction of the pull rod to adjust the pushing force of the pull rod; The push assembly includes: A frame body, the frame body is connected to the positioning assembly, the push member is threadedly assembled with the frame body and is axially movable relative to the frame body; a nut member, the nut member being threadedly assembled on an outer peripheral side of the pushing member, the nut member being adapted to abut against the frame to fix the adjusted pushing member; The pushing member comprises: The first piece is threadedly matched with the frame body, and the nut piece is threadedly assembled on the outer peripheral side of the first piece. a second member connected to one end of the first member facing the pull rod, the second member being axially movable relative to the first member and adapted to abut against the pull rod; An elastic member acts between the first member and the second member, and is suitable for buffering the force of the pull rod on the second member and resetting the second member.

2. The clutch mechanism for a coal mining machine according to claim 1, characterized in that: One of the first and second parts is provided with a guide groove, and the other one is provided with a guide portion, the guide groove extends along the axial direction of the pull rod, the guide portion guides and slides in the guide groove, the elastic part is assembled in the guide groove, and one end of the elastic part stops at the bottom of the guide groove, and the other end of the elastic part stops at the guide portion.

3. The clutch mechanism for a coal mining machine according to claim 1, characterized in that: The frame body is provided with a protruding portion, which protrudes from the surface of the frame body along the axial direction of the pull rod, and the pushing member is threadedly assembled on the protruding portion.

4. The clutch mechanism for a coal mining machine according to claim 3, characterized in that: The frame body is provided with an annular portion, the protruding portion is provided at the center position of the frame body, the annular portion is provided at the edge position of the frame body and surrounds the outer peripheral side of the protruding portion, the annular portion is provided with a plurality of stepped holes, and the plurality of stepped holes are arranged at intervals along the extension direction of the annular portion, the frame body is connected to the positioning assembly through a plurality of fasteners, and the stepped holes are suitable for the fasteners to pass through and for hiding the fasteners.

5. The clutch mechanism for coal mining machine according to claim 4, characterized in that: The push assembly includes: a plurality of first washers, wherein the plurality of first washers are clamped and fixed between ends of the plurality of fasteners and the positioning assembly; and / or, a second washer, wherein the second washer is clamped between the nut member and the frame.

6. The clutch mechanism for a coal mining machine according to any one of claims 1 to 5, characterized in that: The pushing member is provided with a stopping portion, which is arranged at the end of the pushing member away from the pull rod. The stopping portion is suitable for driving the nut member to rotate and can be stopped by the nut member.

7. A coal mining machine, characterized in that: It comprises the clutch mechanism for a coal mining machine as described in any one of claims 1-6.

8. A method for using the clutch mechanism of a coal mining machine according to claim 7, characterized in that: The following steps are involved: S1: Switch the flexible shaft to the transmission position and fix the pushing assembly on the positioning assembly; S2: Start the cutting disc of the coal mining machine; S3: moving the pushing member of the pushing assembly to adjust the acting force between the pushing member and the pull rod and the bearing position between the pull rod and the flexible shaft; S4: After the cutting disc runs stably, the pushing member is fixed; S5: After the cutting operation is completed, the pushing assembly is removed and the flexible shaft is switched to the separation position.

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