Protection device for driving spline shaft of walking box of coal mining machine

Abstract

The utility model discloses a coal mining machine walking box driving spline shaft protection device which comprises a spline cylinder and a conical cylinder, the spline cylinder comprises an inner spline cylinder and an outer spline cylinder which are sequentially arranged in the first direction, the inner spline cylinder is connected with an inner traction output spline shaft, and the outer spline cylinder is connected with a walking box. The inner spline cylinder and the outer spline cylinder are connected through a breaking part and extend in the first direction, the inner spline cylinder is provided with a first boss and a second boss, the first boss is located on the outer side of the inner spline cylinder, the second boss is located on the inner side of the inner spline cylinder, and the conical cylinder is located in the outer spline cylinder. The conical barrel is used for separating the inner space of the outer spline barrel, and the diameter of the conical barrel is gradually reduced in the first direction. The protection device for the driving spline shaft of the walking box of the coal mining machine has the advantages that the spline barrel is convenient to replace after being overloaded and broken, and scraps are efficiently contained.

Description

Technical Field

[0001] The utility model relates to the technical field of shearers, in particular to a protection device for a driving spline shaft of a shearer traveling box. Background Art

[0002] In related technologies, the driving spline shaft of a shearer traveling box generally has overload breaking protection. The way to achieve the breaking protection can be to open a breaking groove in the middle part of the spline shaft. When the shearer travels overloaded, the spline shaft breaks to achieve overload protection during the shearer's travel. Or the outer end face of the spline shaft and the driven wheel are connected and fixed together with multiple bolts or pin shafts. When overloaded, the bolts or pin shafts break to achieve overload protection during the shearer's travel. During use, when a breaking groove is opened in the middle part of the spline shaft, it is easy for a large number of fragments to enter components such as bearings, internal spline teeth, and gears, causing damage to components such as bearings, internal spline teeth, and gears, and enlarging the accident. Moreover, after the accident, there will be a large amount of metal debris that is not easy to clean, the tooth surface is deformed, and the broken spline shaft is not easy to take out. When using bolts or pin shafts for connection, when overloaded, the bolts with insufficient strength break, and the broken bolts will remain in the holes and are difficult to take out. The bolts are unevenly stressed, and it is easy for individual breakages to cause insufficient bearing capacity, and the shearer will break completely when stressed. The bolts need to be replaced more frequently, seriously affecting safety production. Summary of the Utility Model

[0003] The utility model aims to solve at least one of the technical problems in the related technologies to some extent.

[0004] To this end, an embodiment of the utility model provides a protection device for a driving spline shaft of a shearer traveling box, which has the advantages of being convenient to replace after the spline cylinder is overloaded and broken and efficiently accommodating debris.

[0005] According to the protection device for a driving spline shaft of a shearer traveling box in an embodiment of the utility model, the protection device for a driving spline shaft of a shearer traveling box includes a spline cylinder and a tapered cylinder. The spline cylinder includes an inner spline cylinder and an outer spline cylinder arranged in sequence along a first direction. The inner spline cylinder is connected to the inner traction output spline shaft, and the outer spline cylinder is connected to the traveling box. The inner spline cylinder and the outer spline cylinder are connected by a breaking part. Both the inner spline cylinder and the outer spline cylinder extend along the first direction. A first boss and a second boss are provided on the inner spline cylinder. The first boss is located outside the inner spline cylinder, and the second boss is located inside the inner spline cylinder. The tapered cylinder is located inside the outer spline cylinder, and the tapered cylinder is used to separate the internal space of the outer spline cylinder. The diameter of the tapered cylinder gradually decreases along the first direction.

[0006] The driving spline shaft protection device of the shearer traveling box according to the embodiments of the present utility model has the advantages of convenient replacement after the spline barrel is overloaded and broken, and efficient accommodation of debris. This application has the following advantages: the spline barrel with a breaking part can conveniently achieve the overload breaking protection of the driving spline shaft of the shearer traveling box. When the spline barrel breaks, a large amount of metal debris will not be generated. Moreover, the spline barrel has a space for storing the broken debris, which is convenient for taking out and installing, avoiding the situation that a large number of broken pieces enter components such as bearings, internal spline teeth, and gears when the spline shaft breaks, resulting in damage to components such as bearings, internal spline teeth, and gears. In addition, after an accident, there will be a large amount of metal debris that is not easy to clean, the tooth surface is deformed, and the broken spline shaft is not easy to take out. The broken spline barrel is convenient to replace and does not affect production.

[0007] In some embodiments, the second boss is located at one end of the inner spline barrel adjacent to the outer spline barrel.

[0008] In some embodiments, the conical barrel has an inclined surface and a connecting surface. The connecting surface abuts against the outer spline barrel. The inclined surface is inclined with respect to the first direction. The connecting surface is located at the first end of the conical barrel. In the first direction, the diameter of the second end of the conical barrel is smaller than the diameter of the first end of the conical barrel.

[0009] In some embodiments, the driving spline shaft protection device of the shearer traveling box further includes a support member. The first end of the support member is connected to the connecting surface of the conical barrel, and the second end of the support member is connected to the inclined surface.

[0010] In some embodiments, the support member extends along the first direction. The inner diameter of the support member is larger than the diameter of the second end of the conical barrel and smaller than the diameter of the first end of the conical barrel.

[0011] In some embodiments, a screw hole is provided inside the outer spline barrel. The screw hole is located on the side of the outer spline barrel adjacent to the inner spline barrel.

[0012] In some embodiments, the screw hole corresponds to the conical barrel. The support member is sleeved outside the screw hole, and the diameter of the support member is matched with the outer diameter of the screw hole.

[0013] In some embodiments, a magnetic patch is provided on the support member. The magnetic patch is arranged around the conical barrel to attract metal debris.

[0014] In some embodiments, the breaking part is a breaking groove, and the breaking groove is arranged around the outer wall of the outer spline barrel.

[0015] In some embodiments, the breaking groove is a rectangular shear groove or a U-shaped shear groove. Description of the Drawings

[0016] Figure 1 It is a schematic structural diagram of a protection device for the driving spline shaft of a shearer traveling box according to an embodiment of the present utility model.

[0017] Figure 2 It is a schematic structural diagram of a spline barrel of a protection device for the driving spline shaft of a shearer traveling box according to an embodiment of the present utility model.

[0018] Figure 3 It is a schematic diagram of the debris position of a protection device for the driving spline shaft of a shearer traveling box according to an embodiment of the present utility model.

[0019] Reference numerals: 1, inner spline barrel; 11, first boss; 12, second boss; 2, outer spline barrel; 21, screw hole; 3, inner traction output spline shaft; 4, traveling box; 5, breaking part; 6, conical barrel; 7, support member. Detailed implementation manners

[0020] The embodiments of the present utility model will be described in detail below. Examples of the embodiments are shown in the drawings. The embodiments described below with reference to the drawings are exemplary and are intended to explain the present utility model and should not be construed as a limitation to the present utility model.

[0021] According to the driving spline shaft protection device of the shearer traveling box in the embodiments of the present utility model, the driving spline shaft protection device of the shearer traveling box 4 includes a spline barrel and a tapered barrel 6. The spline barrel includes an inner spline barrel 1 and an outer spline barrel 2 arranged in sequence along a first direction. The inner spline barrel 1 is connected to the inner traction output spline shaft 3, and the outer spline barrel 2 is connected to the traveling box 4. The inner spline barrel 1 and the outer spline barrel 2 are connected by a breaking portion 5. Both the inner spline barrel 1 and the outer spline barrel 2 extend along the first direction. A first boss 11 and a second boss 12 are provided on the inner spline barrel 1. The first boss 11 is located on the outer side of the inner spline barrel 1, and the second boss 12 is located on the inner side of the inner spline barrel 1. The tapered barrel 6 is located inside the outer spline barrel 2. The tapered barrel 6 is used to separate the internal space of the outer spline barrel 2, and the diameter of the tapered barrel 6 gradually decreases along the first direction. The spline barrel composed of the inner spline barrel 1 and the outer spline barrel 2 can avoid the problems that the spline shaft is difficult to take out and replace when it breaks. The design that the inner and outer barrels cooperate to facilitate the replacement of the breaking portion 5 allows it to break preferentially during overload, thereby protecting the expensive spline shaft and the traveling box 4 from damage. The first boss 11 and the second boss 12 on the inner spline barrel 1, especially the position design of the second boss 12, help to provide additional support when the spline shaft bears an axial force. The two bosses play a positioning role, facilitating the confirmation of the positions of the inner and outer spline barrels 2. The first boss 11 facilitates the positioning of the inner spline barrel 1, and the second boss 12 facilitates the positioning of the inner traction output spline shaft 3 and the outer spline barrel 2. The second boss 12 also improves the axial bearing capacity of the inner traction output spline shaft 3, avoiding component damage caused by excessive axial force. The tapered barrel 6 can guide the broken metal debris into an area, avoiding the situation where the debris enters components such as the inner spline teeth of the bearing and the gear, causing damage to components such as the bearing, the inner spline teeth, and the gear, improving the reliability and safety of the shearer traveling system, and reducing the maintenance cost and downtime.

[0022] The driving spline shaft protection device of the shearer traveling box according to the embodiments of the present utility model has the advantages of convenient replacement after the spline barrel is overloaded and broken, and efficient accommodation of debris. This application has the following advantages: The spline barrel with the breaking portion 5 can conveniently achieve the overload breaking protection of the driving spline shaft of the shearer traveling box. The breaking of the spline barrel will not generate a large amount of metal debris, and the spline barrel has the function of storing the broken debris in space, which is convenient for taking out and installing, avoiding the situation where a large number of broken pieces of the spline shaft enter components such as the bearing, the inner spline teeth, and the gear, causing damage to components such as the bearing, the inner spline teeth, and the gear. Moreover, after an accident, there will be a large amount of metal debris that is not easy to clean, the tooth surface is deformed, and the broken spline shaft is not easy to take out. The broken spline barrel is convenient to replace and does not affect production.

[0023] In some embodiments, the second boss 12 is located at one end of the inner spline barrel 1 adjacent to the outer spline barrel 2.

[0024] Specifically, the second boss 12 is arranged adjacent to the bottom end of the outer spline cylinder 2 in the axial direction of the inner traction output spline shaft 3 of the inner spline cylinder 1, whereby the second boss 12 can play a positioning role for the inner traction output spline shaft 3.

[0025] In some embodiments, the conical cylinder 6 has an inclined surface and a connecting surface. The connecting surface abuts against the outer spline cylinder 2. The inclined surface is inclined with respect to the first direction. The connecting surface is located at the first end of the conical cylinder 6. In the first direction, the diameter of the second end of the conical cylinder 6 is smaller than the diameter of the first end of the conical cylinder 6.

[0026] Specifically, the design of the inclined surface and the connecting surface of the conical cylinder 6 enables the conical cylinder 6 to guide metal debris along the inclined surface into a preset space and collect the metal debris when the breaking part 5 breaks, avoiding the scattered distribution of metal debris from damaging components, thereby playing an overload protection role. The connecting surface of the conical cylinder 6 can ensure the stable connection between the conical cylinder 6 and the outer spline cylinder 2, preventing the conical cylinder 6 from affecting the operation of the equipment during the operation of the inner and outer spline cylinders 2. This structure of the conical cylinder 6 can effectively provide overload protection for the drive system of the shearer traveling box 4, avoiding mechanical failures caused by overloading.

[0027] In some embodiments, the drive spline shaft protection device of the shearer traveling box 4 further includes a support member 7. The first end of the support member 7 is connected to the connecting surface of the conical cylinder 6, and the second end of the support member 7 is connected to the inclined surface.

[0028] Specifically, the support member 7 connects the connecting surface and the inclined surface of the conical cylinder 6, playing a dual role of limiting and supporting. The support member 7 improves the structural strength of the conical cylinder 6 and reduces the risk of the conical cylinder 6 deforming under force. The presence of the support member 7 ensures the stability of the conical cylinder 6 under normal working conditions.

[0029] In some embodiments, the support member 7 extends in the first direction. The inner diameter of the support member 7 is larger than the diameter of the second end of the conical cylinder 6 and smaller than the diameter of the first end of the conical cylinder 6.

[0030] Specifically, the support member 7 can be a support plate or a support ring. The inner diameter of the support ring is between the diameters of the two ends of the conical cylinder 6 to support the inclined surface of the conical cylinder 6. When the support member 7 is a support plate, there are at least two support plates. The distance between the two support plates is between the diameters of the two ends of the conical cylinder 6 to support the inclined surface of the conical cylinder 6. The support plate or the support ring extends in the first direction.

[0031] In some embodiments, a screw hole 21 is provided inside the outer spline cylinder 2. The screw hole 21 is located on the side of the outer spline cylinder 2 adjacent to the inner spline cylinder 1.

[0032] Specifically, a threaded hole 21 is provided on one side inside the external spline cylinder 2. After the breaking part 5 breaks, the internal spline cylinder 1 and the external spline cylinder 2 are separated, and the threaded hole 21 remains on the internal spline cylinder 1, facilitating the removal of the broken internal spline cylinder 1. The internal spline cylinder 1 is pulled out through the threaded hole 21 to achieve quick replacement, without affecting subsequent safe production.

[0033] In some embodiments, the threaded hole 21 corresponds to the conical cylinder 6, and the support member 7 is sleeved outside the threaded hole 21. The diameter of the support member 7 matches the outer diameter of the threaded hole 21.

[0034] Specifically, sleeving the support member 7 outside the threaded hole 21 can better limit the position of the conical cylinder 6. The corresponding position of the threaded hole 21 and the conical cylinder 6, as well as the structure where the support member 7 is sleeved outside the threaded hole 21, enhance the positioning accuracy and stability of the support member 7. The precise positioning and stable support structure further enhance the overload protection effect and reduce the potential risks caused by assembly errors. By the cooperation of the support member 7 and the threaded hole 21, the conical cylinder 6 can be arranged at the center of the external spline cylinder 2 to ensure the position of the debris collection space and improve the debris collection efficiency.

[0035] In some embodiments, magnetic patches are provided on the support member, and the magnetic patches are arranged around the conical cylinder to attract metal debris.

[0036] Specifically, magnetic patches are evenly arranged on the outer surface of the support member 7. These magnetic patches have strong magnetism and can effectively attract and fix metal debris. When the breaking groove of the conical cylinder 6 breaks, the metal debris is guided to the inclined surface of the conical cylinder 6 and slides down along the inclined surface under the action of gravity. Due to the attraction of the magnetic patches, some of these debris are captured and attached to the support member 7 during the sliding process. By attracting metal debris with the magnetic patches, it is possible to prevent debris from entering key components such as bearings, internal spline teeth, and gears, avoiding secondary damage caused by debris, reducing equipment wear and potential downtime caused by debris. It can be understood that when the debris entering the preset debris space flows out through the surface of the conical cylinder 6 under the action of external force, the magnetic adsorption can reduce the escape of small particle debris.

[0037] In some embodiments, the breaking part 5 is a breaking groove, and the breaking groove is arranged around the outer wall of the external spline cylinder 2.

[0038] Specifically, the breaking groove is arranged between the external spline cylinder 2 and the internal spline cylinder 1. After the breaking groove breaks, the internal and external spline cylinders 2 are separated. The breaking groove is arranged adjacent to the external spline cylinder 2, which facilitates guiding the metal debris generated by breaking to enter the preset space through the surface of the conical cylinder 6 and reducing the impact of debris on the equipment.

[0039] In some embodiments, the breaking groove is a rectangular shear groove or a U-shaped shear groove.

[0040] Specifically, the design of the breaking groove, such as a rectangular shear groove or a U-shaped shear groove, provides a clear fracture path and a smaller fracture cross-section. In case of overload, the breaking groove can break in a predetermined manner, effectively protecting the spline shaft and the traveling box 4, while facilitating maintenance and replacement.

[0041] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They 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 thus should not be construed as a limitation to the present invention.

[0042] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present invention, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0043] In the present invention, unless otherwise clearly specified and limited, the terms "mounted", "connected", "coupled", "fixed", etc. shall be construed in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection, an electrical connection, or communicable with each other; it may be directly connected, or indirectly connected through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0044] In the present invention, unless otherwise clearly specified and limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" and "under" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than that of the second feature.

[0045] In the present utility model, terms such as "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations 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 a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0046] Although the embodiments of the present utility model have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present utility model. Any changes, modifications, substitutions, and variations made by those of ordinary skill in the art to the above embodiments are within the protection scope of the present utility model.

Claims

1. A protection device for the driving spline shaft of a shearer walking box, characterized in that, Comprising: A spline barrel, the spline barrel includes an inner spline barrel and an outer spline barrel arranged in sequence along a first direction. The inner spline barrel is connected to an inner traction output spline shaft, and the outer spline barrel is connected to a traveling box. The inner spline barrel and the outer spline barrel are connected by a breaking part. Both the inner spline barrel and the outer spline barrel extend along the first direction. A first boss and a second boss are provided on the inner spline barrel. The first boss is located outside the inner spline barrel, and the second boss is located inside the inner spline barrel; A conical barrel, the conical barrel is located inside the outer spline barrel. The conical barrel is used to separate the internal space of the outer spline barrel, and the diameter of the conical barrel gradually decreases along the first direction.

2. The driving spline shaft protection device of the shearer traveling box according to claim 1, characterized in that, The second boss is located at one end of the inner spline barrel adjacent to the outer spline barrel.

3. The protection device for the driving spline shaft of the shearer traveling box according to claim 2, characterized in that The conical barrel has an inclined surface and a connecting surface. The connecting surface abuts against the outer spline barrel. The inclined surface is inclined to the first direction. The connecting surface is located at the first end of the conical barrel. In the first direction, the diameter of the second end of the conical barrel is smaller than the diameter of the first end of the conical barrel.

4. The protection device for the driving spline shaft of the shearer traveling box according to claim 3, characterized in that It further includes a support member. The first end of the support member is connected to the connecting surface of the conical barrel, and the second end of the support member is connected to the inclined surface.

5. The driving spline shaft protection device of the shearer traveling box according to claim 4, characterized in that, The support member extends along the first direction. The inner diameter of the support member is larger than the diameter of the second end of the conical barrel and smaller than the diameter of the first end of the conical barrel.

6. The driving spline shaft protection device of the shearer traveling box according to claim 4, characterized in that, A screw hole is provided inside the outer spline barrel. The screw hole is located on the side of the outer spline barrel adjacent to the inner spline barrel.

7. The protection device for the driving spline shaft of the shearer traveling box according to claim 6, characterized in that, The screw hole corresponds to the conical barrel. The support member is sleeved outside the screw hole, and the diameter of the support member is matched with the outer diameter of the screw hole.

8. The shearer traveling box drive spline shaft protection device according to claim 4, characterized in that, A magnetic patch is provided on the support member. The magnetic patch is arranged around the conical barrel to attract metal debris.

9. The protection device for the driving spline shaft of the shearer traveling box according to claim 1, characterized in that, The breaking part is a breaking groove, and the breaking groove is arranged around the outer wall of the outer spline barrel.

10. The protection device for the driving spline shaft of the shearer traveling box according to claim 9, wherein, The breaking groove is a rectangular shear groove or a U-shaped shear groove.

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