External traction device of ultra-thin seam coal mining machine

Abstract

The utility model discloses an external traction device of an ultra-thin seam coal mining machine, which comprises a driving wheel shaft, a chain wheel, a spacer sleeve, a guide shoe, a first external traction component, a second external traction component and a positioning pin, the chain wheel is sleeved on the driving wheel shaft, the spacer sleeve is sleeved on the driving wheel shaft and abuts against the chain wheel, and the guide shoe is sleeved at the front end of the guide sleeve. The first outer traction assembly is rotatably arranged at the rear end of the spacer sleeve, the second outer traction assembly is rotatably arranged at the front end of the driving wheel shaft, and the first outer traction assembly and the second outer traction assembly are connected through a positioning pin. The chain wheel is compact in overall structure and convenient to mount and dismount, the overall length of the chain wheel is effectively shortened, meanwhile, the stress condition of the chain wheel is improved, the chain wheel is only subjected to driving acting force, and the service life of the chain wheel is effectively prolonged.

Description

TECHNICAL FIELD

[0001] The utility model belongs to coal winning machine technical field especially relates to a very thin coal seam coal winning machine outer traction device. BACKGROUND

[0002] The outer traction is an important component of the coal winning machine, is the walking mechanism of the coal winning machine, and has compact structure and complex working condition. For the coal winning machine used in the very thin coal seam, the machine surface height is low, and the disassembly and installation are complex.

[0003] In the prior art, the installation table is formed at the two ends of the chain wheel, the bearing is directly installed at the installation table at the two ends of the chain wheel, and the bearing plays a supporting role. Since the overall length of the chain wheel is relatively long, the chain wheel is usually integrally forged during manufacturing, and the post-processing amount is large. Not only is the processing time-consuming and laborious, but also the blank utilization rate is low. During heat treatment, the blank is prone to deformation, and the quality is difficult to guarantee in the later period. During work, the chain wheel bears the weight of the whole machine, thereby greatly reducing the service life of the chain wheel. CONTENT OF THE UTILITY MODEL

[0004] To at least partially solve the technical problems existing in the prior art, the utility model provides an outer traction device for a coal winning machine in a very thin coal seam.

[0005] The outer traction device for the coal winning machine in the very thin coal seam comprises a driving wheel shaft, a chain wheel, a retaining sleeve, a guide shoe, a first outer traction assembly, a second outer traction assembly and a positioning pin, the chain wheel is sleeved on the driving wheel shaft, the retaining sleeve is sleeved on the driving wheel shaft and abuts against the chain wheel, the guide shoe is sleeved at the front end of the retaining sleeve, the first outer traction assembly is rotatably arranged at the rear end of the retaining sleeve, the second outer traction assembly is rotatable at the front end of the driving wheel shaft, and the first outer traction assembly and the second outer traction assembly are connected through the positioning pin.

[0006] The first outer traction assembly comprises a first bearing, a first outer traction shell, a first transparent cover and a second transparent cover, the first outer traction shell is sleeved on the first bearing, and the first transparent cover and the second transparent cover are arranged at the two ends of the first bearing respectively and used for sealing and limiting the first bearing.

[0007] The second outer traction assembly comprises a second bearing, a second outer traction shell and an end cover, the second outer traction shell is sleeved on the second bearing, and the end cover is arranged at the outer end of the second outer traction shell and used for sealing and limiting the second bearing.

[0008] Further, in the above-mentioned thin coal seam mining machine outer traction device, the first shaft shoulder and the second shaft shoulder are arranged at the front end of the driving wheel shaft, a first limiting table is arranged between the first shaft shoulder and the second shaft shoulder, a spline is arranged at the first limiting table close to one end of the first shaft shoulder in the circumferential direction, and a first ring groove is arranged on the side of the first limiting table close to the spline.

[0009] Further, in the above-mentioned thin coal seam mining machine outer traction device, the chain wheel is connected with the driving wheel shaft through the spline, the first ring groove matches the inner diameter of the chain wheel, and one end of the chain wheel is limited through the first ring groove.

[0010] Further, in the above-mentioned thin coal seam mining machine outer traction device, a ring-shaped positioning table is arranged in the middle of the retainer, a second ring groove is arranged at one end of the retainer, a threaded hole is arranged at the other end of the retainer, the retainer is transitionally matched with the first shaft shoulder, one end of the retainer abuts against the chain wheel, and the second ring groove matches the inner diameter of the chain wheel.

[0011] Further, in the above-mentioned thin coal seam mining machine outer traction device, the inner diameter of the first bearing inner ring matches the diameter of the retainer, the first bearing inner ring is transitionally matched with the retainer, one end of the first bearing inner ring abuts against the ring-shaped positioning table, and the first bearing outer ring is transitionally matched with the first outer traction shell.

[0012] Further, in the above-mentioned thin coal seam mining machine outer traction device, the first transparent cover is rotatably sleeved at the end face of the first outer traction shell, the inner diameter of the first transparent cover matches the diameter of the driving wheel shaft, the first transparent cover inner ring is sleeved with the driving wheel shaft, and the first transparent cover is threadedly engaged with the threaded hole through bolts.

[0013] Further, in the above-mentioned thin coal seam mining machine outer traction device, the second transparent cover is embedded in the first outer traction shell and is fixed through bolts, the second transparent cover inner ring is rotatably sleeved at the ring-shaped positioning table, and the thickness of the second transparent cover is equal to the width of the ring-shaped positioning table.

[0014] Further, in the above-mentioned thin coal seam mining machine outer traction device, the guide shoe is transitionally matched with the retainer, one end of the guide shoe abuts against the ring-shaped positioning table, a third ring groove is arranged at the other end of the guide shoe, the third ring groove and the second ring groove correspondingly form a ring-shaped groove, the ring-shaped groove matches the chain wheel, and the other end of the chain wheel is limited and fixed through the ring-shaped groove.

[0015] Further, in the above-mentioned extremely thin coal seam coal mining machine outer traction device, the second bearing inner ring is in transition fit with the second shaft shoulder, one end of the first bearing inner ring is in abutment with the first limiting table, the second bearing outer ring is in transition fit with the second outer traction shell, the end cover is connected with the second outer traction shell through bolts, an annular boss is arranged on the end cover, and the annular boss is in abutment with the second bearing outer ring.

[0016] Further, in the above-mentioned extremely thin coal seam coal mining machine outer traction device, the first outer traction shell is processed with a first oil channel, the second outer traction shell is processed with a second oil channel, the first oil channel and the second oil channel are connected through an O-shaped ring, and oil holes are arranged between the first outer traction shell and the first bearing and between the second outer traction shell and the second bearing, and the oil holes are in communication with the first oil channel and the second oil channel.

[0017] The extremely thin coal seam coal mining machine outer traction device has the following advantages and beneficial effects:

[0018] The extremely thin coal seam coal mining machine outer traction device has the following advantages and beneficial effects: BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced as follows. Obviously, the drawings in the following description are only used for further understanding of the embodiments of the present application and form a part of the present application. For those skilled in the art, other drawings can also be obtained from these drawings without creative labor. In the drawings:

[0020] Figure 1 It is a whole structure schematic view of the extremely thin coal seam coal mining machine outer traction device of the present application;

[0021] Figure 2 It is a cross-sectional structure schematic view of the extremely thin coal seam coal mining machine outer traction device of the present application;

[0022] Figure 3 It is a driving wheel shaft structure schematic view of the extremely thin coal seam coal mining machine outer traction device of the present application;

[0023] Figure 4 It is a stop sleeve structure schematic view of the extremely thin coal seam coal mining machine outer traction device of the present application;

[0024] Figure 5The utility model discloses an outer traction device wheel shaft structure schematic diagram of extremely thin coal seam coal cutter.

[0025] Figure 6 The utility model discloses an outer traction device end cover structure schematic diagram of extremely thin coal seam coal cutter.

[0026] Mark explanation:

[0027] 1: drive wheel axle, 11: first axle shoulder, 12: second axle shoulder, 13: first limit station, 14: spline, 15: first ring groove;

[0028] 2: chain wheel;

[0029] 3: baffle, 31: annular positioning station, 32: screw hole;

[0030] 4: guide shoe;

[0031] 5: first outer traction assembly, 51: first bearing, 52: first outer traction casing, 521: first oil channel, 53: first transparent cover, 54: second transparent cover;

[0032] 6: second outer traction assembly, 61: second bearing, 62: second outer traction casing, 621: second oil channel, 63: end cover, 64: annular boss;

[0033] 7: positioning pin;

[0034] 8: annular recess, 81: second ring groove, 82: third ring groove;

[0035] 9: oil hole. Specific embodiments

[0036] In order to make the utility model's purpose, technical scheme and advantage more clearly, below will combine the utility model concrete embodiment and corresponding drawing to the utility model technical scheme clear, complete to be described. Obviously, the described embodiment is only the utility model's a part embodiment, is not all the embodiment. Based on the embodiment of the utility model, all other embodiments that the ordinary skill in the art obtains without making creative labor belong to the scope of the utility model protection.

[0037] As Figures 1 to 6As shown in the utility model, the outer traction device of the extremely thin coal seam coal mining machine comprises a driving wheel shaft 1, a chain wheel 2, a retaining sleeve 3, a guide shoe 4, a first outer traction assembly 5, a second outer traction assembly 6 and a positioning pin 7, the chain wheel 2 is sleeved on the driving wheel shaft 1, the retaining sleeve 3 is sleeved on the driving wheel shaft 1 and abuts against the chain wheel 2, the guide shoe 4 is sleeved at the front end of the retaining sleeve 3, the first outer traction assembly 5 is rotatably arranged at the rear end of the retaining sleeve 3, the second outer traction assembly 6 is rotatable at the front end of the driving wheel shaft 1, the first outer traction assembly 5 and the second outer traction assembly 6 are connected through the positioning pin 7, and wherein:

[0038] The first outer traction assembly 5 comprises a first bearing 51, a first outer traction shell 52, a first transparent cover 53 and a second transparent cover 54, the first outer traction shell 52 is sleeved on the first bearing 51, and the first transparent cover 53 and the second transparent cover 54 are arranged at the two ends of the first bearing 51 respectively and are used for sealing and limiting the first bearing 51.

[0039] The second outer traction assembly 6 comprises a second bearing 61, a second outer traction shell 62 and an end cover 63, the second outer traction shell 62 is sleeved on the second bearing 61, and the end cover 63 is arranged at the outer end of the second outer traction shell 62 and is used for sealing and limiting the second bearing 61.

[0040] Further, in the outer traction device of the extremely thin coal seam coal mining machine, the front end of the driving wheel shaft 1 is provided with a first shaft shoulder 11 and a second shaft shoulder 12, a first limiting table 13 is arranged between the first shaft shoulder 11 and the second shaft shoulder 12, a spline 14 is arranged in the circumferential direction of the first shaft shoulder 11 close to one end of the first limiting table 13, and a first ring groove 15 is arranged on the side of the first limiting table 13 close to the spline 14.

[0041] Further, in the outer traction device of the extremely thin coal seam coal mining machine, the chain wheel 2 is connected with the driving wheel shaft 1 through the spline 14, the first ring groove 15 is matched with the inner diameter of the chain wheel 2, one end of the chain wheel 2 is limited through the first ring groove 15, so that the chain wheel 2 is limited and fixed on the driving wheel shaft 1, and the chain wheel 2 can be driven to rotate when the driving wheel shaft 1 rotates.

[0042] Further, in the outer traction device of the extremely thin coal seam coal mining machine, the middle part of the retaining sleeve 3 is provided with an annular positioning table 31, one end of the retaining sleeve 3 is provided with a second ring groove 81, the other end of the retaining sleeve 3 is provided with a threaded hole 32, the retaining sleeve 3 is transitionally matched with the first shaft shoulder 11, one end of the retaining sleeve 3 abuts against the chain wheel 2, and the second ring groove 81 is matched with the inner diameter of the chain wheel 2.

[0043] Further, in the outer traction device of the extremely thin coal seam coal mining machine, the inner diameter of the inner ring of the first bearing 51 is matched with the diameter of the retaining sleeve 3, the inner ring of the first bearing 51 is transitionally matched with the retaining sleeve 3, one end of the inner ring of the first bearing 51 abuts against the annular positioning table 31, and the outer ring of the first bearing 51 is transitionally matched with the first outer traction shell 52.

[0044] Further, in the extremely thin coal seam coal winning machine outer traction device, the first transparent cover 53 is rotatably sleeved at the end surface of the first outer traction shell 52, the inner circle diameter of the first transparent cover 53 matches the diameter of the driving wheel shaft 1, the inner circle of the first transparent cover 53 is sleeved with the driving wheel shaft 1, and the first transparent cover 53 is threadedly engaged with the threaded hole 32 through bolts.

[0045] Further, in the extremely thin coal seam coal winning machine outer traction device, the second transparent cover 54 is embedded in the first outer traction shell 52 and is fixed by bolts, the inner circle of the second transparent cover 54 is rotatably sleeved on the annular positioning table 31, and the thickness of the second transparent cover 54 is equal to the width of the annular positioning table 31, so that the inner circle of the first bearing 51 is limited by the first transparent cover 53 and the annular positioning table 31, the outer circle of the first bearing 51 is limited by the second transparent cover 54, the stability of the first outer traction shell 52 in the rotating process of the driving wheel shaft 1 is effectively ensured, the weight of the first outer traction shell 52 is borne by the retaining sleeve 3, and the chain wheel 2 is convenient to disassemble and assemble.

[0046] Further, in order to improve the service life of the first bearing 51, sealing rings are arranged in the circumferential direction of the outer circle of the first transparent cover 53 and the circumferential direction of the positioning annular table, the sealing gasket in the circumferential direction of the outer circle of the first transparent cover 53 is a Gley ring, and the sealing gasket in the circumferential direction of the positioning annular table is a St ring, so that the sealing performance of the first transparent cover 53 and the second transparent cover 54 is improved, and the leakage of the lubricating oil in the first bearing 51 is prevented.

[0047] Further, in the extremely thin coal seam coal winning machine outer traction device, the guide shoe 4 is transitionally matched with the retaining sleeve 3, one end of the guide shoe 4 abuts against the annular positioning table 31, the other end of the guide shoe 4 is provided with a third ring groove 82, the third ring groove 82 and the second ring groove 81 form an annular groove 8 in correspondence, the annular groove 8 matches the chain wheel 2, and the other end of the chain wheel 2 is limited and fixed through the annular groove 8, so that the chain wheel 2 is completely limited and fixed through the guide shoe 4 and the retaining sleeve 3.

[0048] Further, in the extremely thin coal seam coal winning machine outer traction device, the inner circle of the second bearing 61 is transitionally matched with the second shaft shoulder 12, one end of the inner circle of the first bearing 51 abuts against the first limiting table 13, the outer circle of the second bearing 61 is transitionally matched with the second outer traction shell 62, the end cover 63 is connected with the second outer traction shell 62 through bolts, the annular boss 64 is arranged on the end cover 63, and the annular boss 64 abuts against the outer circle of the second bearing 61, so that the second bearing 61 is limited, and the stability of the second outer traction shell 62 during rotation of the driving wheel shaft 1 is ensured.

[0049] Further, the first oil channel 521 is machined on the first outer traction shell 52, the second oil channel 621 is machined on the second outer traction shell 62, the first oil channel 521 and the second oil channel 621 are connected through an O-shaped ring, oil holes 9 are arranged between the first outer traction shell 52 and the first bearing 51 and between the second outer traction shell 62 and the second bearing 61, and the oil holes 9 are in communication with the first oil channel 521 and the second oil channel 621, so that the first bearing 51 and the second bearing 61 are supplied with oil, and the service life of the first bearing 51 and the second bearing 61 is ensured.

[0050] Specifically, the first outer traction assembly 5 and the guide shoe 4 can be assembled with the retainer 3 at the time of installation, and then the sprocket 2 and the assembled retainer 3 are installed on the drive wheel shaft 1 in sequence, and the second outer traction assembly 6 is assembled and installed with the drive wheel shaft 1, and the disassembly and assembly can be performed according to the replaced parts at the time of maintenance.

[0051] In use, the first outer traction shell 52 and the second outer traction shell 62 are fixed with the traction box through bolts, when the drive wheel shaft 1 rotates, the first outer traction shell 52 and the second outer traction shell 62 are kept stable through the first bearing 51 and the second bearing 61 respectively, and the drive wheel shaft 1 drives the sprocket 2 to rotate to provide traction force to the chain.

[0052] In summary, compared with the prior art, the outer traction device of the extremely thin coal seam coal mining machine has the following advantages and beneficial effects: the overall structure of the utility model is compact, convenient to install and disassemble, effectively shortens the overall length of the sprocket, improves the stress condition of the sprocket, and makes the sprocket only bear the driving force through the guide shoe and the retainer, effectively increases the service life of the sprocket.

[0053] It should be noted that, in this article, unless otherwise specified and limited, the term "connection" or its synonyms should be understood broadly, for example, "connection" can be fixed connection, can also be detachable connection; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be the internal communication of two elements or the interaction relationship of two elements, and those skilled in the art can understand the specific meaning of the above-mentioned term in the utility model according to the specific circumstances. Moreover, expressions such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between the entities or operations. At the same time, the term "includes", "contains" or any other variant thereof is intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or includes elements inherent to such process, method, article or device. In addition, "front", "back", "left", "right", "up", "down" in this article are referred to the placement state shown in the drawings.

[0054] Finally, it should be noted that: the above examples are only used to illustrate the technical solutions of the utility model, but not to limit them; although the utility model has been described in detail with reference to the foregoing examples, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing examples, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the utility model.

Claims

1. An outer traction device of a very thin seam coal mining machine, characterized in that, The outer traction device of the extremely thin coal seam mining machine comprises a driving wheel shaft, a chain wheel, a blocking sleeve, a guide shoe, a first outer traction assembly, a second outer traction assembly and a positioning pin, the chain wheel is sleeved on the driving wheel shaft, the blocking sleeve is sleeved on the driving wheel shaft and abuts against the chain wheel, the guide shoe is sleeved at the front end of the blocking sleeve, the first outer traction assembly is rotatably arranged at the rear end of the blocking sleeve, the second outer traction assembly is rotatably arranged at the front end of the driving wheel shaft, the first outer traction assembly and the second outer traction assembly are connected through the positioning pin, and wherein: The first outer traction assembly comprises a first bearing, a first outer traction shell, a first transparent cover and a second transparent cover, the first outer traction shell is sleeved on the first bearing, and the first transparent cover and the second transparent cover are arranged at two ends of the first bearing respectively for sealing and limiting the first bearing; The second outer traction assembly comprises a second bearing, a second outer traction shell and an end cover, the second outer traction shell is sleeved on the second bearing, and the end cover is arranged at the outer end of the second outer traction shell for sealing and limiting the second bearing.

2. The thin-seam coal cutter outer traction device according to claim 1, characterized in that, The front end of the driving wheel shaft is provided with a first shaft shoulder and a second shaft shoulder, a first limiting table is arranged between the first shaft shoulder and the second shaft shoulder, a spline is arranged in the circumferential direction of the first shaft shoulder close to one end of the first limiting table, and a first ring groove is arranged on the side of the first limiting table close to the spline.

3. The thin-seam shearer outer traction device according to claim 2, characterized in that, The chain wheel is connected with the driving wheel shaft through the spline, the first ring groove is matched with the inner diameter of the chain wheel, and one end of the chain wheel is limited through the first ring groove.

4. The thin-seam shearer outer traction device according to claim 2, characterized in that, The middle part of the blocking sleeve is provided with an annular positioning table, one end of the blocking sleeve is provided with a second ring groove, the other end of the blocking sleeve is provided with a threaded hole, the blocking sleeve is transitionally matched with the first shaft shoulder, one end of the blocking sleeve abuts against the chain wheel, and the second ring groove is matched with the inner diameter of the chain wheel.

5. The thin-seam shearer outer traction device according to claim 4, characterized in that, The inner diameter of the inner ring of the first bearing is matched with the diameter of the blocking sleeve, the inner ring of the first bearing is transitionally matched with the blocking sleeve, one end of the inner ring of the first bearing abuts against the annular positioning table, and the outer ring of the first bearing is transitionally matched with the first outer traction shell.

6. The thin-seam shearer outer traction device according to claim 4, characterized in that, The first transparent cover is rotatably sleeved on the end face of the first outer traction shell, the inner diameter of the first transparent cover is matched with the diameter of the driving wheel shaft, the inner ring of the first transparent cover is sleeved on the driving wheel shaft, and the first transparent cover is threadedly engaged with the threaded hole through bolts.

7. The thin-seam shearer outer traction device according to claim 4, characterized in that, The second transparent cover is embedded in the first outer traction shell and fixed through bolts, the inner ring of the second transparent cover is rotatably sleeved on the annular positioning table, and the thickness of the second transparent cover is equal to the width of the annular positioning table.

8. The thin-seam shearer outer traction device according to claim 4, characterized in that, The guide shoe is transitionally matched with the blocking sleeve, one end of the guide shoe abuts against the annular positioning table, the other end of the guide shoe is provided with a third ring groove, the third ring groove and the second ring groove form an annular groove in correspondence, the annular groove is matched with the chain wheel, and the other end of the chain wheel is limited and fixed through the annular groove.

9. The thin-seam shearer outer traction device according to claim 2, characterized in that, The second bearing inner ring is in transition fit with the second shaft shoulder, one end of the first bearing inner ring is in abutment with the first limiting table, the second bearing outer ring is in transition fit with the second outer traction shell, the end cover is connected with the second outer traction shell through bolts, an annular boss is arranged on the end cover, and the annular boss is in abutment with the second bearing outer ring.

10. The thin-seam shearer outer traction device according to claim 1, characterized in that, A first oil channel is machined on the first outer traction shell, a second oil channel is machined on the second outer traction shell, the first oil channel and the second oil channel are connected through an O-shaped ring, oil holes are arranged between the first outer traction shell and the first bearing and between the second outer traction shell and the second bearing, and the oil holes are in communication with the first oil channel and the second oil channel.

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