A slewing drive for a mining machine

Abstract

The application relates to the field of mine machine driving, and discloses a rotary driving device for a mine machine, which comprises a bearing, the bearing comprising an inner ring, an outer ring sleeved outside the inner ring, rolling bodies arranged between the inner ring and the outer ring and used for supporting the outer ring to rotate relative to the inner ring, a gear ring fixed to the outer side wall of the outer ring and in transmission connection with a driving mechanism and used for receiving power of the driving mechanism and driving the outer ring to rotate, in the application, the inner ring is locked by penetrating through upper and lower cover plates, inner columns and a circular shell through long bolts, the connection strength is high, and the inner ring is not prone to loosening in high-frequency rotary motion; the rolling bodies adopt a double-limiting structure of upper and lower graphite sleeve clamping and short bolt fixing, the installation is firm, the rolling bodies are prevented from deviating, the transmission precision is improved, the rolling bodies are made of graphite material, have excellent self-lubricating performance and wear resistance, do not need to add lubricant additionally, reduce friction loss, and prolong service life; the graphite roller structure is adaptively designed with the upper and lower sleeves, and the rolling stability and the carrying capacity are improved.

Description

Technical Field

[0001] This application relates to the field of mining machine drives, and in particular to a rotary drive device for use in mining machines. Background Technology

[0002] A rotary drive device for mining machines, as a core transmission component, is widely used in engineering machinery, automated production lines, and intelligent equipment. Its performance directly affects the operating accuracy, stability, and service life of the equipment. Existing rotary drive devices for mining machines suffer from the following drawbacks: First, the overall structure is fragmented, lacking a unified mounting cavity, resulting in insufficient stability after assembly and susceptibility to external vibrations leading to transmission deviations. Second, the rolling elements often employ a single structural design, making installation and fixing cumbersome, and their wear resistance and self-lubricating properties are poor, leading to severe wear after long-term use and affecting transmission efficiency. Third, the connection strength between the inner ring and the housing and rolling elements is insufficient, making them prone to loosening during high-frequency rotation, reducing equipment reliability. Fourth, the meshing accuracy between the transmission mechanism and the gear ring is limited, resulting in significant energy loss during power transmission, and inconvenient assembly and disassembly, hindering later maintenance. Utility Model Content

[0003] To address the above problems, this application provides a rotary drive device for mining machines.

[0004] The rotary drive device for mining machines provided in this application adopts the following technical solution: A rotary drive device for a mining machine includes: a bearing, the bearing including an inner ring; an outer ring sleeved on the outside of the inner ring; a rolling element disposed between the inner ring and the outer ring for supporting the rotation of the outer ring relative to the inner ring and reducing friction; and a toothed ring fixed to the outer wall of the outer ring and connected to a drive mechanism for receiving power from the drive mechanism and driving the outer ring to rotate.

[0005] Preferably, it also includes a mounting housing, the mounting housing comprising a long cylindrical shell; A circular shell is fixedly connected to a long cylindrical shell, together forming an installation cavity for accommodating the inner ring, outer ring, gear ring, and drive mechanism.

[0006] Preferably, the drive mechanism includes a worm gear, which is horizontally inserted inside the long cylindrical shell, with one end connected to the drive component; The worm gear is sleeved on the outer wall of the worm and meshes with the gear ring.

[0007] Preferably, the inner ring includes an inner column, which is a hollow columnar structure; The lower cover plate and the upper cover plate are respectively disposed on the bottom surface and the top surface of the inner column; A long bolt passes through the second threaded hole of the upper cover plate, the inner column, and the second threaded hole of the lower cover plate in sequence, and extends downward through the bottom surface of the circular shell, and is locked by a nut.

[0008] Preferably, the rolling element includes an upper graphite sleeve and a lower graphite sleeve arranged symmetrically at the top and bottom; The bottom surface of the upper graphite sleeve is provided with a groove that fits the wall of the lower graphite sleeve, and the lower graphite sleeve is engaged in the groove.

[0009] Preferably, both the lower cover plate and the upper cover plate adopt an annular structure, and their outer diameters are adapted to the outer diameters of the top of the upper graphite sleeve and the bottom of the lower graphite sleeve.

[0010] Preferably, it also includes short bolts that pass through the first threaded hole of the lower cover plate or the upper cover plate in sequence, and extend outward to be threadedly connected to the corresponding lower graphite sleeve and upper graphite sleeve respectively.

[0011] In summary, this application includes the following beneficial technical effects: 1. The inner ring is secured by long bolts that pass through and lock the upper and lower cover plates, inner column and circular shell, resulting in high connection strength and preventing loosening during high-frequency rotation. The rolling elements adopt a double limiting structure with upper and lower graphite sleeves and short bolts for secure installation, preventing rolling element offset and improving transmission accuracy. 2. The rolling elements are made of graphite, which has excellent self-lubricating properties and wear resistance. No additional lubricant is needed, reducing friction loss and extending service life. The matching design of the graphite roller structure and the upper and lower sleeves further improves rolling stability and load-bearing capacity. 3. The modular component design and bolt connection method make it easier to disassemble, replace and maintain each component, reduce the cost of later use, effectively improve the overall structural stability, avoid the influence of external vibration and impurities on the transmission components, and simplify the assembly process. Attached Figure Description

[0012] Figure 1 This is an exploded structural diagram of an embodiment of the application; Figure 2 This is an overall structural diagram of the application embodiment; Figure 3 This is a bottom view of the structure of the embodiment of the application; Figure 4 This is a schematic diagram of the worm gear structure in the embodiment of the application; Figure 5 This is a schematic diagram of the inner ring structure in the embodiment of the application; Figure 6 This is a schematic diagram of the card slot structure in an embodiment of the application.

[0013] Explanation of reference numerals in the attached drawings: 1. Bearing; 2. Inner ring; 201. Inner column; 202. First threaded hole; 203. Lower cover plate; 204. Upper cover plate; 205. Second threaded hole; 3. Gear ring; 4. Long cylindrical shell; 5. Worm gear; 6. Outer ring; 7. Circular shell; 8. Drive component; 9. Long bolt; 10. Worm; 11. Rolling element; 111. Upper graphite sleeve; 112. Lower graphite sleeve; 113. Slot; 12. Short bolt. Detailed Implementation

[0014] The following is in conjunction with the appendix Figure 1-6 This application will be described in further detail.

[0015] This application discloses a rotary drive device for a mining machine, referring to... Figure 1 , Figure 2 and Figure 4 The bearing 1 includes a mounting housing, which is formed by welding and fixing a long cylindrical shell 4 and a circular shell 7 together. The housing has an internal mounting cavity that provides a mounting reference for each transmission component. The inner ring 2, outer ring 6 and rolling elements 11 of the bearing 1 are all located in the mounting cavity. The outer ring 6 is coaxially sleeved on the outside of the inner ring 2, and a gap is reserved between them for mounting the rolling elements 11.

[0016] Reference Figures 2-5 The inner column 201 of the inner ring 2 is a hollow column structure made of stainless steel. The upper and lower ends are respectively welded with annular lower cover plate 203 and upper cover plate 204. The inner diameter of the lower cover plate 203 and upper cover plate 204 is the same as the inner diameter of the inner column 201, and the outer diameter is slightly larger than the outer diameter of the inner column 201. The upper cover plate 204 and the lower cover plate 203 are both provided with second threaded holes 205 and first threaded holes 202 evenly distributed in the circumferential direction. The second threaded hole 205 is located in the inner area close to the inner column 201, and the first threaded hole 202 is located in the outer area away from the inner column 201.

[0017] The long bolts 9 are made of high-strength alloy steel, and their number is preferably matched with the number of second threaded holes 205 by 4-6. The long bolts 9 pass through the second threaded holes 205 of the upper cover plate 204, the hollow channel of the inner column 201, and the second threaded holes 205 of the lower cover plate 203 from top to bottom, and extend downward through the pre-set through hole on the bottom surface of the circular shell 7. They are locked by double nuts to achieve a fixed connection between the inner ring 2 and the mounting shell, ensuring connection strength and coaxiality.

[0018] Reference Figures 5-6The rolling element 11 is a roller structure made of graphite material, consisting of an upper graphite sleeve 111 and a lower graphite sleeve 112, which are symmetrically arranged. The bottom surface of the upper graphite sleeve 111 has an annular groove 113. The inner and outer diameters of the groove 113 are matched with the outer and inner diameters of the top of the lower graphite sleeve 112, so that the top of the lower graphite sleeve 112 can be tightly engaged in the groove 113 to form an integrated rolling element 11, avoiding relative misalignment between the upper and lower sleeves. The outer diameter of the lower cover plate 203 is consistent with the bottom outer diameter of the lower graphite sleeve 112, and the outer diameter of the upper cover plate 204 is consistent with the top outer diameter of the upper graphite sleeve 111, ensuring the fit between the rolling element 11 and the inner ring 2.

[0019] The number of short bolts 12 matches the number of first threaded holes 202. One end of the bolt passes through the first threaded hole 202 of the lower cover plate 203 and is threadedly connected to the threaded hole at the bottom of the lower graphite sleeve 112. The other end passes through the first threaded hole 202 of the upper cover plate 204 and is threadedly connected to the threaded hole at the top of the upper graphite sleeve 111, thereby fixing the rolling element 11 to the inner ring 2 and ensuring the coaxiality of the rolling element 11.

[0020] Reference Figures 1-4 The gear ring 3 is fixed to the outer wall of the outer ring 6 by welding or bolting, with its tooth surface facing the inside of the mounting cavity and meshing with the worm gear 5. The worm 10 is horizontally inserted into the bearing seat inside the long cylindrical shell 4. One end of the worm is connected to the output shaft of the drive component 8, preferably the servo motor, through a coupling, and the other end is supported on the inner wall of the long cylindrical shell 4 through a bearing. The worm gear 5 is keyed to the middle outer wall of the worm 10, and its teeth mesh precisely with the teeth of the gear ring 3. The transmission ratio is preferably set to 1:10-1:30 according to actual needs. The power reduction and precise transmission are achieved through the transmission of the worm 10 and the worm gear 5.

[0021] The implementation principle of a rotary drive device for a mining machine according to an embodiment of this application is as follows: After the drive unit 8 is started, the output power is transmitted to the worm gear 10 through the coupling. The worm gear 10 drives the worm wheel 5 connected to it to rotate. The worm wheel 5 drives the gear ring 3 to rotate through gear tooth meshing. The gear ring 3 drives the fixedly connected outer ring 6 to rotate relative to the inner ring 2. During this process, the upper graphite sleeve 111 and the lower graphite sleeve 112 of the rolling element 11 roll between the inner and outer rings. The self-lubricating properties of graphite material reduce friction loss. At the same time, the limiting effect of the slot 113 and the short bolt 12 ensures the stable operation of the rolling element 11, thereby ensuring the rotational accuracy and stability of the outer ring 6.

[0022] Finally, the following points should be noted: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection", and "linkage" should be interpreted broadly, and can be mechanical or electrical connections, or internal connections between two components, or direct connections. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may change. Secondly: The accompanying drawings of the embodiments disclosed in this utility model only involve the structures involved in the embodiments disclosed in this utility model. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this utility model can be combined with each other. In conclusion, the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

[0023] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A rotary drive device for use in mining machinery, characterized in that, include: Bearing (1), the bearing (1) includes an inner ring (2); The outer ring (6) is fitted onto the outside of the inner ring (2); A rolling element (11) is disposed between the inner ring (2) and the outer ring (6) to support the outer ring (6) to rotate relative to the inner ring (2) and reduce friction; The toothed ring (3) is fixed to the outer wall of the outer ring (6) and connected to the drive mechanism for transmission. It is used to receive the power of the drive mechanism and drive the outer ring (6) to rotate.

2. A rotary drive device for a mining machine according to claim 1, characterized in that: It also includes a mounting housing, which includes a long cylindrical shell (4). A circular shell (7) is fixedly connected to a long cylindrical shell (4) to form an installation cavity for accommodating the inner ring (2), outer ring (6), toothed ring (3) and drive mechanism.

3. A rotary drive device for a mining machine according to claim 2, characterized in that: The drive mechanism includes a worm gear (10) which is horizontally inserted inside the long cylindrical shell (4), and one end of which is connected to the drive component (8); The worm gear (5) is sleeved on the outer wall of the worm (10) and meshes with the gear ring (3).

4. A rotary drive device for a mining machine according to claim 1, characterized in that: The inner ring (2) includes an inner column (201), which is a hollow columnar structure; The lower cover plate (203) and the upper cover plate (204) are respectively disposed on the bottom surface and the top surface of the inner column (201); The long bolt (9) passes through the second threaded hole (205) of the upper cover plate (204), the second threaded hole (205) of the inner column (201) and the second threaded hole (205) of the lower cover plate (203) in sequence, and extends downward through the bottom surface of the circular shell (7), and is locked by a nut.

5. A rotary drive device for a mining machine according to claim 4, characterized in that: The rolling element (11) includes an upper graphite sleeve (111) and a lower graphite sleeve (112) arranged symmetrically at the top and bottom. The bottom surface of the upper graphite sleeve (111) is provided with a groove (113) that is adapted to the wall of the lower graphite sleeve (112), and the lower graphite sleeve (112) is engaged in the groove (113).

6. A rotary drive device for a mining machine according to claim 5, characterized in that: The lower cover plate (203) and the upper cover plate (204) both adopt an annular structure, and their outer diameters are adapted to the top outer diameter of the upper graphite sleeve (111) and the bottom outer diameter of the lower graphite sleeve (112).

7. A rotary drive device for a mining machine according to claim 6, characterized in that: It also includes short bolts (12), which pass through the first threaded hole (202) of the lower cover plate (203) or the upper cover plate (204) in sequence, and extend outward to be threadedly connected to the corresponding lower graphite sleeve (112) and upper graphite sleeve (111) respectively.

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