Floating oil seal structure of cutting gear box of bolter miner and cutting gear box of bolter miner

Abstract

The utility model provides a floating oil seal structure of a cutting gear box of a miner-bolter and the cutting gear box of the miner-bolter, and relates to the field of miner-bolters. The floating oil seal structure of the cutting gear box of the miner-bolter comprises a support, a spline shaft, a rolling bearing, a floating oil seal seat, a limiting piece and a sleeve, wherein the spline shaft is rotatably matched with the support through the rolling bearing. The spline shaft is sleeved with the floating oil seal seat which is connected with the support, the inner side of the floating oil seal seat abuts against the support and the rolling bearing at the same time, the outer side of the floating oil seal seat abuts against the limiting piece, and the limiting piece is fixed to the spline shaft. The spline shaft is sleeved with the sleeve. The floating oil seal structure is not prone to failure, long in service life and low in use cost.

Description

Technical Field

[0001] The utility model relates to the field of anchor diggers, in particular to a floating oil seal structure of a cutting gear box of an anchor digger and a cutting gear box of the anchor digger. Background Art

[0002] The anchor miner is an integrated anchor miner developed on the basis of the wide drum cutting of the continuous miner. It truly realizes the simultaneous cutting, loading, transportation and anchoring, and cuts the entire section and forms a lane in one go, thus significantly improving the development efficiency and ensuring the safety of the operators. When the anchor miner is in operation, a floating oil seal is required to seal the gearbox to prevent oil leakage. However, the floating oil seal is very easy to be damaged due to wear, installation positioning, vibration and other problems.

[0003] The inventor has found that the sealing structure of the cutting gearbox of the bolter miner in the prior art has at least the following disadvantages:

[0004] The floating oil seal seat of the cutting gear box is positioned by a sleeve sleeved on the outside of the spline shaft. When the sleeve is removed, the floating oil seal seat loses the limit of the sleeve, and its position stability is poor, the sealing effect is poor, and the service life is short. Utility Model Content

[0005] The utility model aims to provide a floating oil seal structure of a cutting gear box of an anchor mining machine and a cutting gear box of the anchor mining machine, which can improve the sealing effect, prolong the service life and reduce the use cost.

[0006] The embodiment of the utility model is achieved as follows:

[0007] In a first aspect, the utility model provides a floating oil seal structure for a cutting gear box of an anchor miner, comprising:

[0008] A bracket, a spline shaft, a rolling bearing, a floating oil seal seat, a limit piece and a sleeve, wherein the spline shaft is rotatably matched with the bracket through the rolling bearing; the floating oil seal seat is sleeved on the outside of the spline shaft and connected to the bracket; the inner side of the floating oil seal seat abuts against the bracket and the rolling bearing at the same time, and the outer side of the floating oil seal seat abuts against the limit piece, and the limit piece is fixed on the spline shaft; the sleeve is sleeved on the outside of the spline shaft.

[0009] In an optional embodiment, the floating oil seal seat includes a peripheral fixing part and an inner rotating part that are rotatably matched, and the peripheral fixing part and the inner rotating part are both sleeved on the outside of the spline shaft; the inner side of the peripheral fixing part abuts against the outer ring of the bracket and the rolling bearing at the same time; the inner side of the inner rotating part abuts against the inner ring of the rolling bearing; the outer side of the inner rotating part abuts against the limit part.

[0010] Based on the above scheme, the outer fixing part and the inner rotating part of the floating oil seal seat are positioned independently, and the positioning structures of the two do not interfere with each other. The separate positioning effect is better and the positioning quality is higher, making the cooperation between the outer fixing part and the inner rotating part closer.

[0011] In an optional embodiment, a fixing hole is provided on the peripheral fixing member, and a fastener fixedly connected to the bracket is passed through the fixing hole.

[0012] Based on the above solution, the peripheral fixing member is connected to the bracket by a fastener, the connection method is simple, and the assembly and disassembly are convenient and quick. It should be understood that the fastener can be but not limited to a screw or a bolt.

[0013] In an optional embodiment, an annular groove is provided on the outer side of the inner rotating member, and the annular groove is connected to the hollow area of ​​the inner rotating member; the limiting member is embedded in the annular groove and abuts against the bottom wall of the annular groove.

[0014] Based on the above scheme, an annular groove is provided on the outer side of the inner rotating part, and the thickness of the inner rotating part is reduced at the annular groove, thereby forming an avoidance space for installing a limit member. The limit member is installed on the spline shaft, and the limit member is located in the annular groove and can abut against the bottom wall of the annular groove. The limit member is hidden in the annular groove and will not increase the space occupied by the spline shaft in its axial direction. The axial arrangement of the overall structure is more compact, which is convenient for installation.

[0015] In an optional embodiment, the limiting member is configured as a retaining spring, an annular positioning groove is provided on the outer circumferential surface of the spline shaft, the retaining spring is clamped in the annular positioning groove, and the retaining spring abuts against the outer side of the floating oil seal seat.

[0016] Based on the above solution, the retaining spring has a simple structure, is easy to assemble and has low cost.

[0017] In an optional embodiment, the outer peripheral surface of the spline shaft is provided with an engaging portion for connecting with a cutting blade, and the sleeve covers the engaging portion.

[0018] Based on the above solution, when there is no need to connect the spline shaft to the cutting disc, the sleeve shields the bite portion, and the sleeve plays a role in protecting the bite portion, avoiding damage to the bite portion, and extending the service life of the bite portion.

[0019] In an optional embodiment, the engaging portion is configured as a plurality of protruding teeth arranged at intervals around the axis of the spline shaft.

[0020] Based on the above scheme, the structure of the bite portion is simple, and is clamped with the cutting disc through the cooperation of multiple convex teeth. The connection structure between the spline shaft and the cutting disc is firm and reliable, and the operation is stable and reliable.

[0021] In an optional embodiment, a slot is provided on the inner side of the floating oil seal seat, the bracket is snapped into the slot, and the bracket abuts against the bottom wall of the slot.

[0022] Based on the above solution, the floating oil seal seat and the bracket are snap-fitted together, making the combination more secure.

[0023] In an optional embodiment, the bracket is provided with a first assembly through hole and a second assembly through hole which are connected and coaxially arranged, the aperture of the first assembly through hole is smaller than the aperture of the second assembly through hole, so as to form an annular abutment surface at the connection between the first assembly through hole and the second assembly through hole; the spline shaft is outer-mounted with a step distance ring, the step distance ring is passed through the first assembly through hole and abuts against the annular abutment surface; the rolling bearing is located in the second assembly through hole and abuts against the step distance ring.

[0024] Based on the above scheme, by adjusting the size of the stepped distance ring, the position of the rolling bearing and the floating oil seal seat relative to the bracket is adaptively adjusted, which facilitates the adjustment of manufacturing and assembly errors and adapts to the installation of the rolling bearing and the floating oil seal seat in different scenarios.

[0025] In a second aspect, the utility model provides a cutting gear box for an anchor miner, the cutting gear box for an anchor miner comprising:

[0026] A floating oil seal structure for a cutting gearbox of a bolter miner according to any one of the aforementioned embodiments.

[0027] The beneficial effects of the embodiments of the utility model are:

[0028] In summary, in the floating oil seal structure of the cutting gearbox of the anchor miner provided in this embodiment, the inner side of the floating oil seal seat is limited by the bracket and the rolling bearing, and the degree of freedom of the floating oil seal seat in the first direction is limited. At the same time, the outer side of the floating oil seal seat is limited by the limiter, and the degree of freedom of the floating oil seal seat in the second direction opposite to the first direction is also limited. In this way, the position of the floating bearing seat in the axial direction of the spline shaft is fixed, and the floating bearing seat will not move in the axial direction of the spline shaft relative to the spline shaft. The position of the floating bearing seat is stable and the sealing effect is good. Since the floating bearing seat is limited by the limiter, it does not directly contact the sleeve, and the sleeve does not play a limiting role. When the sleeve is disassembled, it will not affect the position of the floating bearing seat, so it is not easy to cause the problem of damage and failure of the floating bearing seat due to the repeated disassembly and assembly of the sleeve. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0030] Figure 1 A schematic diagram of a floating oil seal structure of a cutting gearbox of an anchor miner according to an embodiment of the utility model;

[0031] Figure 2 for Figure 1 A local enlarged schematic diagram of the .

[0032] icon:

[0033] 100-bracket; 101-first assembly through hole; 102-second assembly through hole; 110-annular abutment surface; 200-spline shaft; 201-annular limiting surface; 202-annular positioning groove; 210-convex tooth; 300-rolling bearing; 310-outer ring; 320-inner ring; 400-floating oil seal seat; 410-outer fixing member; 411-fixing hole; 420-inner rotating member; 421-annular groove; 500-limiting member; 600-sleeve; 700-step distance ring. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0035] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0037] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, or the orientation or position relationship in which the utility model product is usually placed when in use, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0038] In addition, the terms "horizontal", "vertical" and the like do not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0039] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0040] The present embodiment provides a floating oil seal structure for a cutting gear box of an anchor miner, which has good sealing effect, is not prone to seal failure due to installation and positioning reasons, and has a long service life.

[0041] Please combine Figure 1 and Figure 2 In this embodiment, the floating oil seal structure of the cutting gearbox of the anchor miner includes a bracket 100, a spline shaft 200, a rolling bearing 300, a floating oil seal seat 400, a stopper 500 and a sleeve 600. The spline shaft 200 is rotatably matched with the bracket 100 through the rolling bearing 300. The floating oil seal seat 400 is sleeved on the outside of the spline shaft 200 and connected to the bracket 100. The inner side of the floating oil seal seat 400 is in contact with the bracket 100 and the rolling bearing 300 at the same time. The outer side of the floating oil seal seat 400 is in contact with the stopper 500, and the stopper 500 is fixed on the spline shaft 200. The sleeve 600 is sleeved on the outside of the spline shaft 200.

[0042] As described above, the working principle of the floating oil seal structure of the cutting gearbox of the anchor miner provided in this embodiment is as follows:

[0043] The inner side of the floating oil seal seat 400 is limited by the bracket 100 and the rolling bearing 300, and the degree of freedom of the floating oil seal seat 400 in the first direction is limited. At the same time, the outer side of the floating oil seal seat 400 is limited by the limiter 500, and the degree of freedom of the floating oil seal seat 400 in the second direction opposite to the first direction is also limited. In this way, the position of the floating bearing seat in the axial direction of the spline shaft 200 is fixed, and the floating bearing seat will not move in the axial direction of the spline shaft 200 relative to the spline shaft 200. The position of the floating bearing seat is stable and the sealing effect is good. Since the floating bearing seat is limited by the limiter 500, it does not directly contact the sleeve 600, and the sleeve 600 does not play a limiting role. When the sleeve 600 is disassembled, the position of the floating bearing seat will not be affected, so it is not easy to cause the problem of damage and failure of the floating bearing seat due to the position change of the sleeve 600 due to repeated disassembly and assembly.

[0044] The details of the floating oil seal structure of the cutting gearbox of the bolter miner according to the embodiment of the present application are described below by way of example.

[0045] Please combine Figure 1 In this embodiment, the floating oil seal structure of the cutting gearbox of the anchor miner includes a bracket 100, a spline shaft 200, a rolling bearing 300, a floating oil seal seat 400, a stopper 500, a sleeve 600, a fastener (not shown) and a step distance ring 700. The spline shaft 200 is rotatably matched with the bracket 100 through the rolling bearing 300, the step distance ring 700 is fixed on the spline shaft 200, and one side of the rolling bearing 300 abuts against the step distance ring 700. The floating oil seal seat 400 is connected to the bracket 100 through a fastener, and the rolling bearing 300 is clamped between the step distance ring 700 and the floating oil seal seat 400. The inner side of the floating oil seal seat 400 abuts against the bracket 100 and the rolling bearing 300 at the same time, and the outer side of the floating oil seal seat 400 abuts against the stopper 500, and the stopper 500 is fixed on the spline shaft 200. The sleeve 600 is sleeved on the outside of the spline shaft 200 and the two are detachably matched, and there is a distance between the end of the sleeve 600 and the outer side of the floating oil seal seat 400.

[0046] In this embodiment, optionally, a first assembly through hole 101 and a second assembly through hole 102 are provided at the middle position of the bracket 100, and the first assembly through hole 101 and the second assembly through hole 102 are both circular holes, and the first assembly through hole 101 and the second assembly through hole 102 are coaxially arranged, and the aperture of the first assembly through hole 101 is smaller than the aperture of the second assembly through hole 102, that is, the first assembly through hole 101 and the second assembly through hole 102 cooperate to form a stepped hole. The connection between the first assembly through hole 101 and the second assembly through hole 102 forms an annular abutment surface 110.

[0047] Optionally, the shaft section with a smaller outer diameter of the stepped distance ring 700 is inserted into the first assembly through hole 101, and the shaft section with a larger outer diameter of the stepped distance ring 700 is inserted into the second assembly through hole 102. The stepped distance ring 700 abuts against the annular abutment surface 110, and the abutment area is large, so that the stepped distance ring 700 and the bracket 100 are firmly and reliably matched.

[0048] Optionally, an annular limiting surface 201 and an annular positioning groove 202 are provided on the spline shaft 200. The spline shaft 200 is inserted into the first assembly through hole 101 and the second assembly through hole 102. The step distance ring 700 and the rolling bearing 300 are both sleeved on the outside of the spline shaft 200. The side of the step distance ring 700 away from the rolling bearing 300 abuts against the annular limiting surface 201. In this way, the position of the step distance ring 700 in the axial direction of the spline shaft 200 is jointly positioned by the bracket 100 and the spline shaft 200, and the positioning effect is good. The limiting member 500 is installed in the annular positioning groove 202, and the positioning of the limiting member 500 in the axial direction of the spline shaft 200 is achieved by relying on the annular positioning groove 202.

[0049] It should be understood that the limiting member 500 may be a retaining spring, which has a simple structure, low cost, and is easy to assemble.

[0050] At the same time, the spline shaft 200 is also provided with an engaging portion for connecting with the cutting disc. The engaging portion can be set as a plurality of convex teeth 210. Each convex tooth 210 can be set as a strip body extending in the axial direction of the spline shaft 200. The plurality of convex teeth 210 are evenly spaced and arranged in the circumferential direction of the spline shaft 200, that is, in the direction around the axis of the spline shaft 200. The convex teeth 210 are relatively long, have a large engaging area with the cutting disc, have a good fixing effect, and are not easy to be damaged.

[0051] Please combine Figure 2 In this embodiment, optionally, the floating oil seal seat includes a peripheral fixing member 410 and an inner peripheral rotating member 420 that are rotatably matched. The peripheral fixing member 410 is provided with a fixing hole 411. The number of the fixing holes 411 can be multiple. The multiple fixing holes 411 are evenly spaced and arranged in the circumferential direction of the floating oil seal seat. A fastener is inserted into each fixing hole 411, and the fastener is fixedly connected to the bracket 100. For example, the fastener can be a bolt, a screw or a pin. The peripheral fixing member 410 is fixed to the bracket 100 by the cooperation of multiple fasteners, and the peripheral fixing member 410 is firmly and reliably combined with the bracket 100. An annular groove 421 is provided on the outer surface of the inner peripheral rotating member 420.

[0052] When the floating oil seal seat 400 , the bracket 100 and the spline shaft 200 are assembled, the peripheral fixing member 410 of the floating oil seal seat 400 is fixed to the bracket 100 by fasteners, and the inner side surface of the peripheral fixing member 410 abuts against the end surface of the bracket 100 and the outer ring 310 of the rolling bearing 300 at the same time. The inner peripheral rotating member 420 is sleeved on the outside of the spline shaft 200, the inner side surface of the inner peripheral rotating member 420 abuts against the end surface of the inner ring 320 of the rolling bearing 300, and the outer side surface of the inner peripheral rotating member 420 abuts against the stopper 500, and the stopper 500 is located in the annular groove 421, that is, the abutting position of the stopper 500 and the inner peripheral rotating member 420 is located on the groove bottom wall of the annular groove 421, and the stopper 500 is hidden in the annular groove 421. The position of the stopper 500 will not increase the space occupied by the spline shaft 200 in its own axial direction. The entire structure is more compact in the axial direction of the spline shaft 200, which is convenient for installation. During operation, the outer peripheral fixing member 410 is fixed together with the bracket 100, and the inner peripheral rotating member 420, the stopper 500 and the spline shaft 200 rotate together.

[0053] Furthermore, an annular slot is provided on the inner surface of the peripheral fixing member 410 , and the bracket 100 is snapped into the slot. The contact area between the bracket 100 and the peripheral fixing member 410 is large, the combination is firm, and the positioning effect is good.

[0054] It should be understood that the sleeve 600 is sleeved on the outside of the spline shaft 200 and rotates with the spline shaft 200. The sleeve 600 can be disassembled relative to the spline shaft 200. When the convex teeth 210 on the spline shaft 200 are not needed, the sleeve 600 is sleeved on the outside of the spline shaft 200 and shields the convex teeth 210 to protect the convex teeth 210.

[0055] The floating oil seal structure of the cutting gearbox of the anchor mining machine provided in this embodiment realizes the axial limitation of the floating oil seal seat 400 on the spline shaft 200 through the limiting member 500. The sleeve 600 does not directly contact the floating oil seal seat 400. There is a gap between the sleeve 600 and the floating oil seal seat 400. When the sleeve 600 is disassembled and assembled, the positioning of the floating oil seal seat 400 will not be affected, and the positioning failure of the floating oil seal seat 400 will not be easily caused.

[0056] The present embodiment also provides a cutting gear box for an anchor miner, including the floating oil seal structure of the cutting gear box for an anchor miner of the above embodiment, which has the advantages of simple structure, good sealing effect, and low sealing failure.

[0057] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A floating oil seal structure for a cutting gearbox of an anchor miner, characterized in that: include: A bracket (100), a spline shaft (200), a rolling bearing (300), a floating oil seal seat (400), a stopper (500) and a sleeve (600); the spline shaft (200) is rotatably matched with the bracket (100) through the rolling bearing (300); the floating oil seal seat (400) is sleeved on the outside of the spline shaft (200) and connected to the bracket (100); the inner side of the floating oil seal seat (400) is in contact with the bracket (100) and the rolling bearing (300) at the same time, the outer side of the floating oil seal seat (400) is in contact with the stopper (500), and the stopper (500) is fixed on the spline shaft (200); the sleeve (600) is sleeved on the outside of the spline shaft (200).

2. The floating oil seal structure of the cutting gear box of the bolter miner according to claim 1 is characterized by: The floating oil seal seat (400) comprises an outer fixing member (410) and an inner rotating member (420) which are rotatably matched, and the outer fixing member (410) and the inner rotating member (420) are both sleeved on the outside of the spline shaft (200); the inner side of the outer fixing member (410) is in contact with the bracket (100) and the outer ring (310) of the rolling bearing (300) at the same time; the inner side of the inner rotating member (420) is in contact with the inner ring (320) of the rolling bearing (300); and the outer side of the inner rotating member (420) is in contact with the limit member (500).

3. The floating oil seal structure of the cutting gear box of the bolter miner according to claim 2 is characterized by: The peripheral fixing member (410) is provided with a fixing hole (411), and the fixing hole (411) is used to pass a fastener fixedly connected to the bracket (100).

4. The floating oil seal structure of the cutting gear box of the bolter miner according to claim 2 is characterized by: An annular groove (421) is provided on the outer side of the inner rotating member (420), and the annular groove (421) is communicated with the hollow area of ​​the inner rotating member (420); the limiting member (500) is embedded in the annular groove (421) and abuts against the bottom wall of the annular groove (421).

5. The floating oil seal structure of the cutting gear box of the bolter miner according to claim 1, characterized in that: The limiting member (500) is configured as a retaining spring, an annular positioning groove (202) is provided on the outer peripheral surface of the spline shaft (200), the retaining spring is retained in the annular positioning groove (202), and the retaining spring abuts against the outer side of the floating oil seal seat (400).

6. The floating oil seal structure of the cutting gear box of the bolter miner according to claim 1, characterized in that: The outer peripheral surface of the spline shaft (200) is provided with an engaging portion for connecting with a cutting blade, and the sleeve (600) covers the engaging portion.

7. The floating oil seal structure of the cutting gear box of the bolter miner according to claim 6, characterized in that: The engaging portion is configured as a plurality of protruding teeth (210) arranged at intervals around the axis of the spline shaft (200).

8. The floating oil seal structure of the cutting gear box of the bolter miner according to claim 1, characterized in that: A clamping groove is provided on the inner side of the floating oil seal seat (400), the bracket (100) is clamped in the clamping groove, and the bracket (100) abuts against the bottom wall of the clamping groove.

9. The floating oil seal structure of the cutting gear box of the bolter miner according to claim 1, characterized in that: The bracket (100) is provided with a first assembly through hole (101) and a second assembly through hole (102) which are connected and coaxially arranged, the aperture of the first assembly through hole (101) is smaller than the aperture of the second assembly through hole (102), so as to form an annular abutment surface (110) at the connection between the first assembly through hole (101) and the second assembly through hole (102); the outer shell of the spline shaft (200) is provided with a stepped distance ring (700), the stepped distance ring (700) is passed through the first assembly through hole (101) and abuts against the annular abutment surface (110); the rolling bearing (300) is located in the second assembly through hole (102) and abuts against the stepped distance ring (700).

10. A cutting gearbox for bolter miner, characterized in that: The bolter cutting gearbox comprises: A floating oil seal structure for a cutting gearbox of an anchor miner according to any one of claims 1 to 9.

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