JP4583913B2 - Lubricating device for roller mill reducer - Google Patents

Description

  The present invention relates to a lubrication device for a speed reducer that drives a rotary table of a roller mill that installs a roller on a rotary table and pulverizes an object to be crushed between the rotary table and the roller.

A conventional roller mill speed reducer lubrication device is disclosed in Japanese Patent Application Laid-Open No. 7-80336.
This device is a lubricating device that supplies lubricating oil from a supply pump installed outside to a rotating portion such as a meshing portion of each gear of the speed reducer and a bearing device that supports each gear. Specifically, the configuration is such that the lubricating oil from the supply pump is supplied to the meshing portions of the gears of the reduction gear and the bearing portions thereof even during driving of the reduction gear through the oil passage provided in the casing.
JP 7-80336 A

  The above-described conventional roller mill speed reducer drives a heavy-load rotary table, so that seizure occurs due to the stop of the lubricating oil. However, in the conventional technology, it is necessary to install a separate lubricating oil supply pump around the reducer and connect it to the roller mill reducer by piping from this pump. This is a cause of an increase in the probability that the gears of the reduction gear will be worn out or the bearing will be seized due to the supply stop or insufficient supply of lubricating oil to the reduction gear. In addition, the area around the reduction gear became complicated.

A main shaft to which power from a drive movement source has an upper casing and a boss provided on the lower casing is transferred through an input shaft which is held through a bearing sun gear thereon, there is fixed to the upper portion of said casing An internal gear that meshes with the sun gear via a planetary gear around the sun gear of the main shaft, a bearing that is disposed around the internal gear and rotatably supports an output flange of the roller mill, In a roller mill speed reducer configured with a planetary frame fixed to an output flange of a roller mill and rotatably supporting the planetary gear,
An oil bath provided at the lower end of the casing and immersed in the lower end of the main shaft, a supply passage for supplying lubricating oil from an oil pump provided at the lower end of the main shaft, and an upper end of the supply passage inserted into the supply passage A pipe 19 connected to an oil chamber formed by a recess of the flange, an oil passage provided in the output flange and communicating with the oil chamber, and a bottom plate around the internal gear at the lower portion of the output flange A lubricating chamber for supplying lubricating oil to the bearing of the sun gear, and the oil passage opens at a meshing portion of the sun gear and the planetary gear, a bearing portion of the planetary gear, and an upper portion of the lubricating chamber, and the sun gear and the planetary gear. Lubricating oil is supplied to the meshing portion of the gear, the bearing portion of the planetary gear, and the lubrication chamber, and the lubricant supplied to the meshing portion of the sun gear, the planetary gear, and the bearing portion of the planetary gear. The oil lubricates the bearing disposed below the oil and then returns to the oil bath, and the lubricating oil supplied to the lubrication chamber lubricates the bearing of the input shaft that transmits the power to the main shaft or directly into the oil bath. It is characterized by being configured to reflux .

The present invention includes a main shaft that is rotatably supported at a central portion of a casing and receives power from a driving source and has a sun gear on the upper portion thereof, and is fixed to the upper portion of the casing and is surrounded by the sun gear on the main shaft. The sun gear meshes with the planet gear through the planetary gear, a bearing that is arranged around the internal gear and rotatably supports the output flange of the roller mill, and the output flange of the roller mill is fixed. In a roller mill speed reducer configured with a planetary frame that rotatably supports the planetary gear,
Lubricating oil is supplied to the parts that require lubrication from the upper oil chamber through the oil passage of the reduction gear through the oil passage provided on the main shaft by the oil pump provided at the lower end of the main shaft only by driving the reduction gear. Self-lubricating is possible. Also, since the lubricating oil discharged from the oil pump returns to the large capacity oil bath provided at the lower part of the casing of the speed reducer via the bearing part and the lubricating chamber provided in the speed reducer, the gear meshing part, etc. Since fresh lubricating oil can be supplied, it has the effect of preventing reduction gear seizure.

  FIG. 1 is a cross-sectional view of a speed reducer according to an embodiment of the present invention. FIG. 2 is a partial cross-sectional view of the oil pump portion of FIG.

  In FIG. 1, the casing 2 of the speed reducer 1 has a configuration in which an upper casing 2a and a lower casing 2b are integrally connected. On the upper surface of the upper casing 2a, an output flange 3 for rotating a grinding table of a roller mill is rotatably supported by a bearing 4. The lower casing 2b is formed with an oil bath 5 in which the lower end of the main shaft 10 is rotatably supported and the lubricating oil is stored up to the molten metal surface H so that the lower end of the main shaft 10 is immersed.

  The main shaft 10 whose lower end is rotatably supported by the lower casing 2b is immersed in the oil of the oil bath 5 at the lower end, and the bosses 11b and 11c provided on the plate member 11a fixed radially to the lower casing 2b The bearing 11 is supported by a bearing 11 so as to be rotatable, and an oil pump 12 is provided at the lower end thereof. The upper portion of the main shaft 10 is rotatably supported by a bearing 14 provided on a bearing holder 13 fixed to the bottom plate 2c of the upper casing 2a.

A shaft 16 provided with a sun gear 17 is connected to the upper portion of the main shaft 10 by a spline joint 15. Further, at the center of the main shaft 10, there is provided a lubricating oil supply passage 18 that opens at the lower end of the main shaft 10 and is supplied with the lubricating oil from the oil pump 12. The lubricating oil supply passage 18 is formed by drilling the central portion of the main shaft 10 and then inserting a pipe 19. The upper end of the pipe 19 is connected to an oil chamber 20 a to which the recess 20 of the output flange 3 is configured and the oil passage 45 is connected. At the same time, it is rotatably supported by a bearing 21 provided in the recess 20. The pipe 19 is fixed to the lower end of it to the main shaft 10 by a nut 27. The oil chamber 20a serves to supply constantly lubricating oil because those oil passage 45 is connected to the oil passage 45 of the output flange 3 where the main shaft 10 rotational speed is different.

  A large-diameter bevel gear 30 provided at the center of the main shaft 10 is configured to mesh with and rotate with a small-diameter bevel gear 32 provided on an input shaft 31 to which a power source is connected. This input shaft 31 is configured to be rotatably supported by a bearing 34a and a bearing 34b provided in a housing 33 inserted and fixed in a boss 37 provided in the upper casing 2a and the lower casing 2b. The oil passage 35 provided in the housing 33 includes an opening end 35a and an opening end 35b provided at the positions of the bearing 34a and the bearing 34b, and communicates with the oil passage 36 provided in the boss 37. is there. Accordingly, the lubricating oil supplied through the oil passage 36 is supplied to the bearing 34a and the bearing 34b from the opening end 35a and the opening end 35b through the oil passage 35. The lubricating oil supplied to the bearings 34 a and 34 b returns to the oil bath 5 through the oil discharge passage 38 provided in the housing 33.

  As shown in detail in FIG. 2, the oil pump 12 provided at the lower end of the main shaft 10 has a boss 11c fixed to a plate member 11a for mounting the bearing 11 and the boss 11c inserted and fixed. A screw pump comprising a case 22 attached to both of the bosses 11a provided with a screw body 23 and a rotating body 24 fixed to the lower end of the main shaft 10 having a screw portion 23 approaching the inside of the case 22 in the case 22 It is. In the oil pump 12, a hole 25 provided in the upper part of the case 22 is a lubricating oil supply port communicating with the oil bath 5.

  When the large-diameter bevel gear 30 rotates the main shaft 10 in the direction of arrow A, the oil pump 12 rotates the rotating body 24 together with the main shaft 10. Is sent to the lower chamber 26 along the inner surface of the case 22 through the hole 25 and supplied to the oil chamber 20 a through the pipe 19. Although the oil pump 12 has been described as an example of a screw pump, other types such as a trochoid pump may be used as long as it can be installed at the end of the main shaft 10.

  The upper casing 2a of the casing 2 is provided with a bottom plate 2c on which various equipments are installed. On the upper surface of the bottom plate 2c, an output gear 3 is rotatably supported by a bearing 4, and an internal gear 41 is fixed to which the sun gear 17 provided on the main shaft 10 is meshed via a planetary gear 40 at the center. It is. A bearing holder 13 that extends downward along the main shaft 10 is provided on the bottom surface of the bottom plate 2c. The bearing holder 13 is fixed to the output flange 3, and a bearing 42 that rotatably holds a lower end of a planetary frame 43 that holds a planetary gear 40 that meshes with an internal gear 41, and an upper portion of the main shaft 10. And a bearing 14 that holds the shaft rotatably.

  The sun gear 17, the planetary gear 40, and the planetary frame 43 constitute a planetary gear reduction mechanism. When the sun gear 17 rotates, the planetary gear 40 is rotated by this rotation, and the internal gear fixed to the bottom plate 2c. The planetary frame 43 rotates with the output flange 3. That is, when the sun gear 17 is rotated from the small-diameter bevel gear 32 via the large-diameter bevel gear 30, the planetary gear 40 rotates, and the planetary frame 43 revolves. The output flange 3 is rotated.

  The oil passage 45 provided in the output flange 3 includes an opening end 45a that opens to the oil chamber 20a formed by the recess 20, and has discharge ports 46a to 46c that discharge lubricating oil from the opening end 45a. The discharge port 46a is constituted by the bottom plate 2c around the internal gear 41, and is positioned above the lubrication chamber 47 for supplying the lubricant to the bearing 4. The lubrication oil from the oil chamber 20a is supplied to the lubrication chamber 47. To supply. The discharge port 46b is positioned above the bearing 40a of the planetary gear 40 and rotates together with the planetary gear 40, so that the lubricating oil from the oil chamber 20a is constantly supplied to the bearing 40a. Further, the discharge port 46c is located at the meshing portion of the sun gear 17 and the planetary gear 40, and rotates together with the meshing portion to constantly supply the lubricating oil from the oil chamber 20a.

  Thus, when the lubricating oil is supplied from the opening end 45a, a part of the oil passage 45 is supplied from the discharge port 46a to the lubrication chamber 47, supplied from the discharge port 46b to the bearing 40a, and discharged from the discharge port 46c. To the meshing portion of the sun gear 17 and the planetary gear 40. The lubricating oil dropped from the discharge port 46b and the discharge port 46c always rotates at the same position of the output flange 3 and the planetary frame 43. Therefore, even if the rotational speeds of the sun gear 17 and the planetary frame 43 are different. The lubricating oil is always supplied to the meshing portion of the bearing 40a, the sun gear 17, and the planetary gear 40. The lubrication chamber 47 is provided around the outside of the internal gear 41, and the discharge port 46a is positioned above the lubrication chamber 47 regardless of the rotation of the output flange 3. It will be supplied constantly.

  Further, the lubricating oil dropped from the discharge port 46b and the discharge port 46c is accumulated in the lubrication chamber 13b formed by the bearing holder 13 after lubricating the meshing portion of the sun gear 17 and the planetary gear 40 and the bearing 40a. Lubricate the bearing 42. Then, the lubricating oil stored in the lubricating chamber 13 b is dropped onto the upper surface of the large-diameter bevel gear 30 through the discharge hole 13 a provided above the bearing holder 13 and returns to the oil bath 5.

  Further, the lubrication chamber 47 is provided with an overflow window 52 and a pipe 50 fixed to the bottom plate 2c is opened. The position of the opening end 50a of the first pipe 50 and the height of the lower end 51 of the overflow window 52 are made substantially equal. Therefore, the lubricating oil is held in the lubricating chamber 47 at substantially the height of the opening end 50 a of the pipe 50 and is always supplied to the bearing 4.

  The pipe 50 has a lower end connected to the oil passage 36 of the boss 37, and the lubricating oil flowing out from the lubrication chamber 47 through the opening end 45 a is bearing from the opening end 35 a and the opening end 35 b through the oil passage 35. 34a and bearing 34b. The lubricating oil that has lubricated the bearing 34 a and the bearing 34 b returns to the oil bath 5 through a discharge oil passage 37 provided in the lower portion of the housing 33. When the supply of lubricating oil to the lubrication chamber 47 increases and the pipe 50 cannot be sufficiently discharged, it returns to the oil bath 5 from the overflow tank 53 through the drain oil passage 54 via the lower end 51 of the overflow window 52.

Lubricating oil from the oil pump 12 provided at the lower portion of the main shaft 10 is supplied from the lubricating oil pipe 19 to the oil chamber 20a, and is stored in the lubricating chamber 47 from the oil chamber 20a through the oil passage 45 through the discharge port 46a. Further, the oil is recirculated from the pipe 50 through the oil passage 36 to the oil bath 5 through the oil discharge passage 38, and the lubricating oil is poured over a bearing in the middle thereof. Further, the lubricating oil flowing out from the discharge port 46b and the discharge port 46b flows into the oil bath 5 from the lubrication chamber 13b through the discharge hole 13a, and lubricates bearings and the like in the path. As described above, the lubricating oil is supplied to the oil chamber 20a provided between the members having different rotational speeds, and is circulated from the oil chamber 20a in multiple directions so as to return to the large oil bath 5. Proper lubrication.

  In the embodiment having the above configuration, when the rotation from the drive source is transmitted to the input shaft 31, the main shaft 10 is rotated by the meshing rotation of the small-diameter bevel gear 32 and the large-diameter bevel gear 30. Since the rotation of the main shaft 10 is transmitted from the sun gear 17 to the planetary gear 40 via the spline joint 15, the planetary gear 40 meshes with the internal gear 41 and rotates to revolve the planetary frame 43. The revolution of the planetary frame 43 rotates the output flange 3 because the planetary frame 43 is connected to the output flange 3. The rotation of the output flange 3 is decelerated by the meshing rotation of the large-diameter bevel gear 30 and the small-diameter bevel gear 32, and further decelerated by the meshing rotation of the sun gear 17 and the planetary gear 40, and the planetary gear. It becomes a value decelerated by the meshing rotation of 40 and the internal gear 41.

Lubricating oil in the oil bath 5 is supplied from the hole 25 of the case 22 to the lower chamber 26 by the screw portion 23. The lubricating oil supplied to the lower chamber 26 flows out from the inside of the pipe 19 of the main shaft 10 to the oil chamber 20a. The lubricating oil supplied to the oil chamber 20a is supplied from the oil passage 45 through the discharge port 46a to the lubrication chamber 47 and lubricates the bearing 4, and also lubricates the bearing 34a and the bearing 34b from the pipe 50 through the oil passage 35. Then, the oil flows back to the oil bath 5 through the oil discharge passage 38.
Further, the lubricating oil flowing out from the discharge port 46b and the discharge port 46c from the oil passage 45 lubricates the meshing portion of the bearing 40a of the planetary gear 40, the planetary gear 40, and the sun gear 17, and is then stored in the lubrication chamber 13b. After the bearing 14 and the bearing 42 are lubricated, the bearing 14 and the bearing 42 are dropped into the large-diameter bevel gear 30 from the discharge hole 13a and returned to the oil bath 5.

It is sectional drawing of the reduction gear which concerns on one Example of this invention. It is a fragmentary sectional view of the oil pump part of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Reducer 2 Casing 3 Output flange 4 Bearing 5 Oil bus 10 Main shaft 12 Oil pump 17 Sun gear 18 Supply passage 20 Recess 20a Oil chamber 41 Internal gear 43 Planetary frame 45 Oil path 47 Lubrication chamber

Claims (1)

A main shaft to which power from a drive movement source has an upper casing and a boss provided on the lower casing is transferred through an input shaft which is held through a bearing sun gear thereon, there is fixed to the upper portion of said casing An internal gear that meshes with the sun gear via a planetary gear around the sun gear of the main shaft, a bearing that is disposed around the internal gear and rotatably supports an output flange of the roller mill, In a roller mill speed reducer configured with a planetary frame fixed to an output flange of a roller mill and rotatably supporting the planetary gear,
An oil bath provided at the lower end of the lower casing, in which the lower end of the main shaft is immersed , a supply passage for supplying lubricating oil from an oil pump provided at the lower end of the main shaft, and an upper end thereof inserted into the supply passage A pipe 19 connected to the oil chamber formed by the recess of the output flange, an oil passage provided in the output flange and communicating with the oil chamber, and a bottom plate around the internal gear at the lower part of the output flange A lubricating chamber that supplies lubricating oil to a bearing of the flange, and the oil passage opens to the meshing portion of the sun gear and the planetary gear, the bearing portion of the planetary gear, and the upper portion of the lubricating chamber, and the sun gear; Lubricating oil is supplied to the meshing portion of the planetary gear, the bearing portion of the planetary gear, and the lubrication chamber, and is also supplied to the meshing portion of the sun gear, the planetary gear, and the bearing portion of the planetary gear. Lubricating oil lubricates the bearing disposed below and then returns to the oil bath, and the lubricating oil supplied to the lubricating chamber lubricates the bearing of the input shaft that transmits the power to the main shaft or directly after the oil bath. self-lubricating device roller mill speed reducer, characterized in that a structure for recirculating the

Images