JP2006218444A - Reduction gear device for vertical mill - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a reduction gear device for a vertical mill comprising an output table and a carrier integrated into one body, wherein sets of related parts constituting the reduction gear device are disposed underneath vertically aligned planes horizontal to its casing, by which vertical downsizing and a high load transmission capacity of the device are achieved. <P>SOLUTION: The reduction gear device for a vertical mill comprises an output table 12 that is disposed on top of the casing 10 and supported by a thrust bearing 11 so as to rotate freely; and a planetary gear reducer 3 that is disposed underneath the bottom surface plane of the output table 12, comprising a sun gear 20, a planetary gear 22, a planetary frame 24 for the planetary gear 22, and an internal gear 21; wherein the output table 12 and the planetary frame 24 of the planetary gear reducer 3 are integrated into one body as an output table assembly 2 and the individual gears and the planetary frame 24 of the planetary gear reducer 3 are disposed underneath the above horizontal bottom surface plane together with the thrust bearing 11 supporting the output table 12 of the output table assembly 2. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a vertical mill speed reducer used for driving an industrial vertical pulverizer (vertical mill) used for pulverizing coal and limestone.

Patent Document 1 includes an input shaft, an intermediate shaft disposed substantially orthogonal to the input shaft, a planetary gear device, and an output table, and the planetary gear device is further attached to a tip portion of the intermediate shaft. A sun gear, a plurality of planetary gears meshed with the sun gear, a carrier that rotatably holds the plurality of planetary gears, and an internal gear that meshes with the planetary gear, the output table being connected to the carrier In the speed reducer, the carrier and the output table are integrated,
An output shaft radial bearing that supports the integrated output table is disposed on the lower side of the output table, and the planetary gear is disposed below the output shaft radial bearing,
The outer diameter position of the output shaft radial bearing is radially outward from the maximum radial position of the planetary gear, and an opening having a larger diameter than the outer diameter of the sun gear is provided in the center of the output table and the carrier, and integrated. When the assembly in which the output table, the inner race part of the output shaft radial bearing and the planetary gear are assembled in advance is assembled into the cylindrical case part from above, the meshing state of the sun gear and the planetary gear can be monitored. A featured reduction gear for a mill is disclosed.

  Patent Document 1 having the above configuration arranges a radial bearing that maintains stability in the rotation direction of the output table under a thrust bearing that bears the load in the thrust direction applied to the output table while rotatably supporting the output table, And it is the structure which arrange | positions a planetary gear in the lower surface. In other words, since the configuration of functions required for the vertical mill speed reducer is sequentially stacked in the height direction, an increase in size in that direction could not be avoided.

In addition, since the radial bearing is configured to be provided with a planetary gear on the lower surface of the carrier that is integrated with the output table and rotatably supported by the radial bearing, the diameter of the carrier is set to the diameter of the internal gear that meshes with the planetary gear. It is necessary to make the diameter larger. For this reason, it is necessary to increase the diameter of the radial bearing, which increases the size of the part.
Furthermore, since the planetary gear is supported by a cantilever shaft on the temporary surface of the carrier, the load transmission capacity is reduced.
Japanese Patent No. 3550478

  The present invention relates to a vertical mill speed reducer in which an output table and a planetary gear type speed reducer are integrated, and the components constituting the vertical mill speed reducer are superimposed on the horizontal plane of the casing on the horizontal plane. The purpose of the arrangement is to reduce the size in the vertical direction and to obtain a large load transmission capacity by adopting a configuration corresponding to a part for which a large transmission load is required.

Means and effects for solving the problems

The vertical mill speed reducer according to the present invention includes an output table rotatably supported on the upper part of a casing via a thrust bearing, a sun gear, a planetary gear, and a planetary gear disposed on the lower surface of the output table. A planetary gear type speed reducer composed of a planetary frame and an internal gear, an input shaft disposed at the lower part of the casing and connected to a drive source, and the rotation of the input shaft for the sun of the planetary gear type speed reducer In a vertical mill speed reduction device configured with a speed reducer configured with a plurality of gears between an output shaft having a connection portion that transmits to a gear,
An output table assembly in which the output table and the planetary frame of the planetary gear type speed reducer are configured integrally, and a horizontal plane including the thrust bearing that supports the output table of the output table assembly Position each gear and planetary frame of the planetary gear type reduction gear, arrange the plurality of gears of the reduction gear on a horizontal plane including the input shaft, and lower end of the planetary frame of the planetary gear type reduction device. The reducer is supported by a bearing on the casing and a connecting portion of the speed reducer is disposed on a horizontal plane including the bearing.

  According to this, each gear of the planetary gear type speed reducer and the planetary frame are positioned on a horizontal plane including a thrust bearing that supports the output table, and a plurality of gears of the speed reducer are arranged in a horizontal direction including the input shaft. Since the lower end of the planetary frame of the planetary gear type speed reducer is supported on the casing by a bearing and the connecting portion of the speed reducer is arranged on a plane including the bearing, each horizontal plane Since each component is superimposed on, the dimension in the height direction can be reduced.

  Further, the planetary frame of the output table assembly is provided with a lower holding body that is parallel to the output table and connected to the output table, and the center of the arrangement space constituted by the lower holding body and the output table And a planetary gear that meshes with the sun gear and the internal gear, and the support shaft of the planetary gear is held by the output table and the lower holding body. It is characterized by.

  According to this, the planetary frame of the output table assembly includes a lower holding body, and both ends of the shaft of the planetary gear are held by the lower holding body and the output table, so that the load acting on the planetary gear is increased. Can do.

  Further, the planetary frame of the output table assembly has an outer diameter of the connecting member smaller than an inner diameter of the internal gear, and extends to a lower portion of the connecting member and is held by the casing via a bearing. A rotation holding member is continuously provided, and the outer diameter of the rotation holding member is smaller than the outer diameter of the connecting member.

  According to this, since the planetary frame of the output table assembly has a smaller diameter toward the lower end, the diameter of the bearing that supports the output table rotatably in the radial direction can be particularly reduced.

  Further, the small-diameter bevel gear provided on the input shaft that is rotatably supported in the horizontal direction at the lower portion of the casing, and the small-diameter bevel gear on the shaft that is vertically and rotatably held at the lower portion of the casing. A large-diameter spur gear that is provided with a meshing large-diameter bevel gear and a small-diameter spur gear, and that is vertically and rotatably held at the lower portion of the casing and whose upper end meshes with the shaft connected to the sun gear. And a small-diameter spur gear and a large-diameter spur gear are arranged on a horizontal plane including the input shaft.

  According to this, since the small-diameter bevel gear and the large-diameter bevel gear convert the horizontal rotation to the vertical rotation and decelerate, and the small-diameter spur gear and the large-diameter spur gear decelerate, the sun of the planetary gear reducer Since the rotation of the gear is sufficiently decelerated, the reduction ratio of the planetary gear reducer can be reduced. For this reason, the size in the radial direction of the planetary speed reducer is configured to be small, and the size in the vertical direction can be reduced because the speed reducer is close to the horizontal plane including the axis of the input shaft.

  The best mode of the present invention will be described below with reference to FIG.

  A vertical mill speed reduction device 1 shown in FIG. 1 is rotatably supported by a thrust bearing 11 on an upper portion of a casing 10, and an output table 12 on which a planetary gear type speed reducer 3 is integrally provided. And an input shaft 13 connected to a drive source at the lower part of the casing 10 is provided horizontally and freely rotatable, and the planetary gear type speed reducer 3 reduces the rotation of the input shaft 13 to reduce the rotation. Is provided with a speed reducer 5 for transmission via a connecting part 7.

  An output table assembly 2 of the vertical mill reduction gear 1 is installed rotatably on the upper surface of the output table 12 and casing 10 via a thrust bearing 11, and the planetary gear type speed reducer 3 is provided on the lower surface thereof. This is a configuration provided. This planetary gear type speed reducer 3 is driven between the sun gear 20 driven by the speed reducer 5 and installed at the center of the output table 12, and the internal gear 21 fixed to the upper portion of the sun gear 20 and the casing 10. The planetary gear 22 is arranged and meshes with both the sun gear 20 and the internal gear 21.

  The planetary frame 24 provided on the lower surface of the output table 12 includes a lower holding body 25 that is parallel to the output table 12 and extends in the horizontal direction, and a connecting member 28 that attaches the lower holding body 25 to the lower surface of the output table 12. An arrangement space 29 in which the planetary gear 22 and the sun gear 20 are provided between the lower surface of the output table 12 and the lower holding body 25 is formed. That is, the lower holding body 25 is formed integrally with the output table 12 so as to form an arrangement space 29 between the lower surface of the output table 12 and constitutes the planetary frame 24 of the planetary gear type speed reducer 3. To do. The shaft 23 of the planetary gear 22 is configured to be supported at both ends with its upper end fixed to the output table 12 and its lower end fixed to the lower holding body 25. Therefore, the planetary gear 22 can be applied with a large load. The sun gear 20 has a configuration in which the upper end is supported at the center of the output table 12 and the lower end is connected to the output shaft 40 of the speed reducer 5 at the connection portion 7. Further, the planetary frame 24 is configured integrally with a connecting member 28 between the lower holding body 25 and the output table 12. The connecting member 28 of the planetary frame 24 has a configuration in which a portion where the planetary gear 22 and the internal gear 21 mesh with each other is omitted because a plurality of planetary gears 22 are provided.

  In the planetary gear type speed reducer 3 having the above configuration, when the rotation from the output shaft 40 of the speed reducer 5 is transmitted to the sun gear 20 and rotated, the planetary gear 22 meshes with the sun gear 20 and rotates. Then, it meshes with the internal gear 21 and rotates to revolve around the sun gear 20. Since this revolution is transmitted to the output table 12 via the shaft 23 of the planetary gear 22, the output table 12 is supported by the thrust bearing 11 and rotates.

  The lower rotation holding part 26 extending downward from the lower holding body 25 of the planetary frame 24 is supported by a bearing 27 provided at the upper part inside the casing 10 and holds the lower part of the output table 12. is there. Further, a coupling 31 for connecting the output shaft of the speed reducer 5 and the sun gear 20 is disposed inside the lower rotation holding portion 26. Further, the outer diameter of the planetary frame 24 is smaller than the inner diameter of the internal gear 21, and the lower rotation holding portion 26 extending downward from the lower holding body 25 is further smaller. The lower rotation holding unit 26 is required to have a function of stabilizing the rotation of the output table 12, and most of the load acting on the output table 12 is received by the thrust bearing 11. do not need.

  The connecting portion 7 provided between the lower part of the planetary frame 24 and the upper part of the speed reducer 5 is provided inside the bearing 27, and is connected between the tip of the output shaft 40 of the speed reducer 5 and the lower end of the sun gear 20 shaft. A spline into which both are inserted is constituted by a coupling 31 provided at both ends thereof. A gap is formed between the outer diameter of the coupling 31 and the inner diameter of the lower rotation holding portion 26 so as to overlap the horizontal plane including the bearing 27.

  The speed reducer 5 connected to the input shaft 13 is rotatably supported inside the casing 10 and is connected to the sun gear 20 of the planetary gear type speed reducer 3 in the previous period through the coupling 31 of the connection portion 7. An output shaft 40 having a large-diameter spur gear 41, a small-diameter spur gear 42 meshing with the large-diameter spur gear 41, and a small-diameter spur gear 42 are provided with a large-diameter bevel gear 43 at the upper portion thereof, and are rotatable inside the casing 10. An input shaft provided with a held intermediate shaft 44 and a small-diameter bevel gear 45 that is provided at the lower portion of the casing 10 so as to be horizontally rotatable and that is connected to a drive source and meshes with the large-diameter bevel gear 43 at the inner upper end of the casing 10. 13.

  The speed reducer 5 decelerates the rotation at which the drive source rotation is transmitted to the input shaft 13 by the meshing rotation of the small-diameter bevel gear 45 and the large-diameter bevel gear 43, and the meshing rotation of the small-diameter bevel gear 45 and the large-diameter spur gear 41. It works to slow down further. Then, the rotation of the large-diameter spur gear 41 is transmitted to the sun gear 20 of the planetary gear type reduction gear 3 through the coupling 31. In the speed reducer 5, a small-diameter bevel gear 45 and a large-diameter spur gear 41 are disposed so as to overlap a horizontal plane including the axis of the input shaft 13, and the horizontal including the axis of the input shaft 13. Since the large-diameter bevel gear 43 is arranged close to the plane of the direction, the dimension in the direction (height direction of the casing 10) perpendicular to the horizontal plane including the axis of the input shaft 13 is made as small as possible. Is.

  When the rotation from the power source is transmitted to the input shaft 13 in the vertical mill reduction gear 1 having the above configuration, the rotation of the drive source is reduced by each gear of the reduction gear 5, and the output shaft of the reduction gear 5. 40 is transmitted to the sun gear 20 of the planetary gear speed reducer 3 through the coupling 31 of the connecting portion 7. When the sun gear 20 rotates, the planetary gear 22 meshing with the sun gear 20 is rotated, so that the planetary gear 22 revolves along the internal teeth of the internal gear 21. Since the revolution of the planetary gear 22 is transmitted to the output table 12 via the shaft 23 of the planetary gear 22, the output table 12 is supported by the thrust bearing 11 and rotates.

  During the rotation of the output table 12 described above, most of the load acting on the output table 12 is borne by the thrust bearing 11. Further, even if the lateral vibration of the vertical mill acts on the output table 12 and the output table 12 vibrates in the lateral direction, the vibration is alleviated by the coupling 31 of the connecting portion 7. Transmission to the output shaft 40 is eased. In addition, the inside of the casing 10 is an oil chamber in which lubricating oil is stored, and although a detailed description is omitted, each rotating portion and the meshing portion of each gear are lubricated by a lubricating device.

  Further, when assembling the vertical mill speed reducer 1, the output table 12 and the planetary gear type speed reducer 3 are integrally assembled as the output table assembly 2, and the speed reducer 5 is assembled to the casing 10 in another place. . When the assembly of the two parts is completed in this way, the assembly of the output table 12 is inserted from the upper part of the casing 10, the lower end of the sun gear 20 is inserted into the coupling 31 of the connection part 7, and the bearing 27 is rotated downward. It is completed by inserting the holding part 26.

It is sectional drawing of embodiment of this invention.

Explanation of symbols

2 Output table assembly 3 Planetary gear reducer 5 Reducer 7 Connection 10 Casing 11 Thrust bearing 12 Output table 13 Input shaft 20 Sun gear 21 Internal gear 22 Planetary gear 23 Axis 24 Planetary frame 25 Lower holder 26 Lower rotation holding Portion 27 Bearing 28 Connecting member 31 Coupling 40 Output shaft 41 Large diameter spur gear 42 Small diameter spur gear 43 Large diameter bevel gear 44 Intermediate shaft

Claims (4)

An output table rotatably supported on the upper part of the casing via a thrust bearing, and arranged on the lower surface of the output table, is composed of a sun gear, a planetary gear, a planetary frame of the planetary gear, and an internal gear. A planetary gear reducer, an input shaft that is disposed at the bottom of the casing and connected to a drive source, and an output shaft having a connection for transmitting rotation of the input shaft to the sun gear of the planetary gear reducer; In the vertical mill speed reducer with a speed reducer composed of a plurality of gears between,
An output table assembly in which the output table and the planetary frame of the planetary gear type speed reducer are configured integrally, and a horizontal plane including the thrust bearing that supports the output table of the output table assembly Position each gear and planetary frame of the planetary gear type reduction gear, arrange the plurality of gears of the reduction gear on a horizontal plane including the input shaft, and lower end of the planetary frame of the planetary gear type reduction device. A speed reducer for a vertical mill characterized in that it is supported by a bearing on the casing and a connecting portion of the speed reducer is arranged on a horizontal plane including the bearing.   The planetary frame of the output table assembly is provided with a lower holding body that is parallel to the output table and connected to the output table, and a solar space is formed at the center of the arrangement space constituted by the lower holding body and the output table. A planetary gear that is arranged with a gear and meshed with the sun gear and the internal gear is arranged, and a support shaft of the planetary gear is held by the output table and the lower holding body. The speed reducer for a vertical mill according to claim 1, characterized in that:   The planetary frame of the output table assembly has an outer diameter of a connecting member smaller than an inner diameter of the internal gear, and extends to a lower portion of the connecting member and is held by the casing via a bearing. The vertical reduction gear for a vertical mill according to claim 1 or 2, wherein an outer diameter of the rotation holding member is smaller than an outer diameter of the connecting portion.   A small-diameter bevel gear that is provided on an input shaft that is rotatably supported in a horizontal direction at a lower portion of the casing, and a small-sized bevel gear that is vertically and rotatably held at the lower portion of the casing. A large-diameter bevel gear and a small-diameter spur gear are provided, and a large-diameter spur gear that is vertically and rotatably held at the lower part of the casing and that engages with the small-diameter spur gear on an axis connected to the sun gear. 4. A reduction gear for a vertical mill according to claim 1, wherein a small-diameter spur gear and a large-diameter spur gear are arranged on a horizontal plane including the input shaft.

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