JP2018103125A - Rotary crusher, and seal member replacement method in rotary crusher - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a seal member for blocking a space in which a bearing, which supports a main spindle, is accommodated, and a lower space in the state that maintenance can be easily performed.SOLUTION: A gyratory crusher comprises a spider 14, an upper bearing 50, a main spindle 4, a fitting frame 60, and annular seal members 62, 63. A bearing mount face 30c is formed on the spider 14. The upper bearing 50 is fitted so that a lower end part thereof is supported from a lower side by the bearing mount face 30c. The main spindle 4 is rotatably supported by a spherical bearing 50 so that a direction of a rotation axis thereof can be changed. The fitting frame 60 is so located as to surround a circumference of the main spindle 4, and is so fixed to the spider 14 as to be removable downward. The annular seal members 62, 63 are located between the fitting frame 60 and the main spindle 4.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a rotary crusher and a seal member replacement method in a rotary crusher.

  2. Description of the Related Art Conventionally, a rotary crusher that crushes rocks such as rough stones by the action of a corn cave and a mantle attached to a main shaft that rotates eccentrically with respect to the corn cave is known. Patent document 1 discloses this kind of rotational crusher.

  The rotary crusher of Patent Document 1 has a configuration in which an upper end portion of a main shaft is accommodated and supported in a spider center portion. Specifically, a bearing for supporting the upper end portion of the main shaft is accommodated in the central portion of the spider. By this bearing, the upper end portion of the main shaft is supported so that the direction of the rotation axis can be changed.

  Although not specifically described in the above-mentioned Patent Document 1, generally, lubricating oil for lubricating the bearing is supplied to a portion in the central portion of the spider where the bearing is accommodated. In such a configuration, in order to prevent the lubricating oil and fat from leaking into a space (crushing chamber) where the lubricating oil and fat is crushed by the lower corn cave and the mantle, the lubricating oil and fat supplied to the bearing can be crushed with rocks and the like. In order to prevent the generated stone dust and the like from being mixed, it is preferable to block the space in the center of the spider where the bearing is arranged and the lower space (crushing chamber) using a seal member. However, since the sealing member is a consumable item, it is preferable that the sealing member is provided in a manner that can be easily attached and detached without complicated operations such as disassembly of other components, if possible.

JP 2005-13876 A

  However, Patent Document 1 does not mention anything about the configuration for blocking the space in the center of the spider where the bearing is disposed and the space below (the crushing chamber).

  The present invention has been made in view of the above circumstances, and its main purpose is to facilitate maintenance of a seal member for blocking a space in which a bearing supporting the main shaft is accommodated and a lower space. It is to be provided in a state where it can be performed.

  The problems to be solved by the present invention are as described above. Next, means for solving the problems and the effects thereof will be described.

  According to a first aspect of the present invention, a rotary crusher having the following configuration is provided. That is, this rotary crusher includes a spider, a bearing, a main shaft, a mounting frame, and an annular seal member. A bearing mount surface is formed on the spider. The bearing is attached so that a lower end portion thereof is supported from below by the bearing mounting surface. The main shaft is supported by the bearing so as to be rotatable and the direction of the rotation axis can be changed. The mounting frame is disposed so as to surround the outer periphery of the main shaft, and is fixed to the spider so as to be removable downward. The annular seal member is disposed between the mounting frame and the main shaft.

  Thereby, the mounting frame and the seal member can be removed from the lower side of the spider while the bearing is supported by the bearing mount surface. Therefore, maintenance of the seal member can be easily performed.

  According to the 2nd viewpoint of this invention, the sealing member replacement | exchange method in the following rotation type crushers is provided. That is, the seal member replacement method in this rotary crusher is a seal member replacement method in a rotary crusher that includes a spider, a bearing, a main shaft, a mounting frame, and an annular seal member. A bearing mount surface is formed on the spider. The lower end of the bearing is supported from below by the bearing mount surface. The main shaft is supported by the bearing so as to be rotatable and the direction of the rotation axis can be changed. The mounting frame is disposed so as to surround the outer periphery of the main shaft, and is fixed to the spider so as to be removable downward. The annular seal member is disposed between the mounting frame and the main shaft. In this rotary crusher, the seal member replacement method is such that the mounting frame is removed from the spider while the bearing is mounted on the bearing mount surface and the bearing is assembled. Process.

  As a result, the number of members that need to be removed during maintenance of the seal member can be reduced, and the replacement work of the seal member is simplified.

  According to the present invention, it is possible to provide a seal member for shutting off a space in which a bearing that supports the main shaft is accommodated and a lower space in a state where maintenance can be easily performed.

1 is a schematic side cross-sectional view showing a configuration of a rotary crusher according to an embodiment of the present invention. Side surface sectional drawing which shows in detail the support structure of the upper end part of a main axis | shaft at the time of employ | adopting a spherical bearing type upper bearing among the structures of a rotation type crusher. Side surface sectional drawing which shows in detail the support structure of the upper end part of a main axis | shaft at the time of employ | adopting a bush type upper bearing among the structures of the rotary crusher which concerns on another embodiment. The perspective view which shows the structure of a mounting frame and the sealing member attached to it. Side surface sectional drawing which shows the state which pulled out the spider and the bearing from the main axis | shaft for replacement | exchange of a sealing member. The perspective view which shows the structure of the attachment frame based on a modification, and the sealing member attached to it.

  Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a schematic side sectional view showing a configuration of a rotary crusher 100 according to an embodiment of the present invention. In FIG. 1, the support structure of the upper end portion of the main shaft 4 is shown in a simplified manner.

  A rotary crusher 100 according to this embodiment shown in FIG. 1 crushes rocks such as raw stones so as to have an appropriate particle size. The rotary crusher 100 includes an upper frame 11, a lower frame 13, a spider 14, a main shaft 4, a mantle 5, a cone cave 6, an eccentric sleeve 7, a power transmission mechanism 20, and the like. The main shaft 4 that performs a scribing motion about the upper end portion is accommodated in a generally cylindrical outer structure constituted by connecting the upper frame 11 and the lower frame 13 vertically. The mantle 5 attached to the main shaft 4 and the cone cave 6 attached to the inner peripheral surface of the upper frame 11 act on the rock as the main shaft 4 is crushed so that the rock is crushed. It is configured.

  The upper frame 11 forms an outer shell of the upper part of the rotary crusher 100. The upper end of the upper frame 11 is connected to the lower end of the outer edge of the spider 14. The lower end portion of the upper frame 11 is connected to the upper end portion of the lower frame 13. As illustrated in the present embodiment, when the rotary crusher 100 is configured as a gyre crusher, the upper frame 11 is formed in a conical shape whose radial dimension decreases as it goes downward. Although not shown, when the rotary crusher 100 is configured as a cone crusher, the upper frame 11 is formed in a conical shape whose radial dimension increases toward the lower side. A cone cave 6 is disposed on the inner peripheral surface of the upper frame 11.

  The lower frame 13 forms an outer shell of the lower part of the rotary crusher 100. The upper end of the lower frame 13 is connected to the lower end of the upper frame 11. In the present embodiment, the lower frame 13 is formed in a shape whose diameter increases as it goes downward. The lower end of the lower frame 13 is open, and the rock after crushing can be recovered from the open part.

  The main shaft 4 is a long shaft-like member accommodated inside the spider 14, the upper frame 11, and the lower frame 13. The main shaft 4 is provided with its axis line oriented generally in the vertical direction so as to be disposed at the center of these frames in plan view and side view. The upper end portion of the main shaft 4 is supported on the outer edge of the spider 14 by a spider arm 31. More specifically, the upper end portion of the main shaft 4 is supported by an upper bearing 50 provided at the central portion of the spider 14 (a spider central portion 30 described later). With this configuration, the main shaft 4 is rotatable, and the direction of the axis (rotation axis) can be changed with the upper end portion as a fulcrum.

  As the upper bearing 50, a spherical bearing 50 as shown in FIGS. 1 and 2 can be applied, or a bush type bearing (sliding bearing) 50 as shown in FIG. 3 can be applied. it can. Below, the case where the spherical bearing 50 is applied as the upper bearing 50 is mainly demonstrated.

  A midway portion of the main shaft 4 has a conical shape whose diameter increases toward the bottom. The distance between the outer peripheral surface of the conical portion and the inner peripheral surface of the upper frame 11 gradually becomes narrower as it approaches the lower end from the upper end portion of the conical portion.

  The spider 14 is a structure for supporting the upper end portion of the main shaft 4 on the outer edge of the spider 14 via the spider arm 31 and arranging the main shaft 4 at the center portion of the spider 14 in plan view. The spider 14 is a spider center portion 30 disposed in the center portion of the spider 14 in a plan view, and a plurality (two in this embodiment) of spiders that connect the spider center portion 30 and the outer edge of the spider 14. And an arm 31.

  The mantle 5 is configured as a hollow, generally conical member, and is attached to the outer peripheral surface of the conical portion of the main shaft 4.

  The cone cave 6 is configured as a generally plate-shaped member, and a plurality of cone caves 6 are attached to the inner peripheral surface of the upper frame 11. As shown in FIG. 1, the space | interval of the front-end | tip (tooth tip) of this cone cave 6 and the front-end | tip (tooth top) of the above-mentioned mantle 5 becomes narrow gradually as it goes below.

  Since the mantle 5 and the corn cave 6 are portions that act on the rock that is the object to be crushed, the mantle 5 and the corn cave 6 are formed of a hard and hard-wearing material such as high manganese steel. Further, the mantle 5 and the cone cave 6 have a removable structure so that they can be exchanged when worn to some extent.

  The eccentric sleeve 7 is rotationally driven by a power transmission mechanism 20 to be described later in a state where the lower end portion of the main shaft 4 is inserted into the through hole portion. The through-hole of the eccentric sleeve 7 is formed in a circular shape and is eccentric with respect to the rotation axis of the eccentric sleeve 7. A bush (not shown) is disposed between the main shaft 4 and the inner peripheral surface of the through hole of the eccentric sleeve 7. As a result, the main shaft 4 is inserted into the eccentric sleeve 7 in a state where it can rotate relative to the through-hole.

  The power transmission mechanism 20 transmits power for rotating the eccentric sleeve 7 to the eccentric sleeve 7. The power transmission mechanism 20 includes a horizontal shaft 21, a bevel pinion 22, a bevel gear 23, and the like.

  The horizontal shaft 21 is a member supported by the lower frame 13 via the bearing 15 in a state where the rotation axis is directed in the horizontal direction (lateral direction). A bevel pinion 22 is fixed to an end portion of the both ends of the horizontal shaft 21 arranged on the side close to the main shaft 4. The horizontal shaft 21 rotates when power from a drive source (for example, an electric motor) is transmitted via a V belt and a V pulley, and the bevel pinion 22 is also rotated.

  The bevel gear 23 is fixed to the lower end portion of the eccentric sleeve 7. The bevel gear 23 is provided so as to mesh with the bevel pinion 22. As a result, the power transmitted to the horizontal shaft 21 is transmitted to the bevel gear 23, and the eccentric sleeve 7 rotates.

  As described above, the power from the drive source is transmitted to the horizontal shaft 21 and further transmitted to the eccentric sleeve 7 via the bevel pinion 22 and the bevel gear 23. As a result, the lower end portion of the main shaft 4 inserted into the through hole of the eccentric sleeve 7 turns in the virtual horizontal plane. That is, the main shaft 4 makes a so-called “grinding motion” by turning the lower end portion around the portion supported by the upper bearing 50 while sequentially changing the direction of the rotation axis thereof.

  Since the position of the mantle 5 in a plan view is periodically changed by the grinding motion of the main shaft 4, the distance between the tip of the cone cave 6 and the tip of the mantle 5 is repeatedly increased or decreased.

  The rock is crushed in the crushing chamber S in which the mantle 5 and the corn cave 6 are arranged inside the upper frame 11. In other words, the rock introduced from above the upper frame 11 is crushed under the action of the mantle 5 and the corn cave 6.

  Below, the spider center part 30 and the member assembled | attached to this are demonstrated in detail. FIG. 2 is a side sectional view showing in detail the support structure of the upper end portion of the main shaft 4 in the configuration of the rotary crusher 100 of the present embodiment.

  The spider center portion 30 is a substantially short cylindrical member whose axis is directed in the vertical direction, and is disposed between the two spider arms 31 in this embodiment. The spider center portion 30 is supported on the outer edge of the spider 14 via a spider arm 31. A through hole penetrating in the vertical direction is formed in the central portion of the spider central portion 30 in plan view (hereinafter, this through hole may be referred to as a central through hole). In other words, the central through hole is formed in a substantially cylindrical shape at the center of the spider central portion 30. In the lower part of the central through hole, the spider central part 30 is formed so that an annular flange part 30a protrudes radially inward in plan view (as a result, a step is formed in the lower part of the central through hole. Have been). A cylindrical wall portion 30b is formed on the entire outer periphery of the flange portion 30a. The cylindrical wall portion 30b extends upward from the outer peripheral portion of the flange portion 30a.

  The upper surface of the flange portion 30a of the spider center portion 30 forms a bearing mount surface 30c. The bearing mount surface 30c of the present embodiment is a horizontal annular surface. A mounting frame mount portion 30 d is formed on the lower surface of the spider center portion 30. In other words, the mounting frame mount portion 30d is disposed on the opposite side (lower side) from the side on which the bearing mount surface 30c is disposed with respect to the flange portion 30a. A mounting frame 60 described later is mounted on the mounting frame mounting portion 30d.

  An upper bearing 50 is mounted on the bearing mount surface 30c of the spider center 30. The lower end portion of the upper bearing 50 is supported from below by the bearing mount surface 30c. As described above, the present embodiment shows the case where the spherical bearing 50 is applied as the upper bearing 50, but the present invention is not limited to this, and the bush type bearing 50 may be applied as the upper bearing 50 ( (See FIG. 3).

  A plurality of screw holes 30f for fixing the upper bearing 50 to the spider central portion 30 are formed on the upper surface of the cylindrical wall portion 30b of the spider central portion 30 so as to extend over the entire circumference at intervals in the circumferential direction. .

  The upper bearing 50 according to the present embodiment includes an outer ring configured by vertically aligning a lower outer ring 51 and an upper outer ring 52, an inner ring 53 disposed inside the outer ring, and a plurality of outer ring coupling bolts (outer ring coupling members). ) 54.

  The lower outer ring 51 is a member that forms the lower half of the outer ring of the upper bearing 50 (spherical bearing) of the present embodiment, and has a hemispherical shape for contacting the inner ring 53 on the inner peripheral side of a short cylindrical member. The sliding surface is formed.

  The upper outer ring 52 is a member forming the upper half of the outer ring of the upper bearing 50 (spherical bearing) of the present embodiment, and has a hemispherical shape for contacting the inner ring 53 on the inner peripheral side of a short cylindrical member. A sliding surface is formed.

  The inner ring 53 is a spherical member, and a circular and penetrating shaft hole is formed at the center thereof. The inner diameter of the shaft hole is slightly larger than the outer shape of the upper end portion of the main shaft 4. The inner ring 53 has a lower half portion in contact with the sliding surface of the lower outer ring 51 and an upper half portion in contact with the sliding surface of the upper outer ring 52, and the lower outer ring 51 and the upper outer ring. 52 is assembled.

  The outer ring coupling bolt 54 moves the lower outer ring 51 and the upper outer ring 52 up and down (with the inner ring 53 supported on the inner side of the outer ring) to hold the upper bearing 50 (spherical bearing) in an assembled state. To join. A plurality of outer ring coupling bolts 54 are arranged side by side in the circumferential direction.

  The upper bearing 50 (spherical bearing) having such a configuration is attached to the spider center portion 30 in an assembled state, and the upper end of the main shaft 4 is inserted into the shaft hole of the inner ring 53 of the upper bearing 50 (spherical bearing). By inserting the portion, the upper end portion of the main shaft 4 is supported by the upper bearing 50. As a result, the upper end portion of the main shaft 4 is rotatable relative to the inner ring 53 in the circumferential direction. Further, since the inner ring 53 can rotate around an arbitrary axis with respect to the lower outer ring 51 and the upper outer ring 52 (outer ring), the upper end portion of the main shaft 4 inserted into the shaft hole of the inner ring 53. The direction of the rotation axis can be changed.

  The upper bearing 50 (spherical bearing) is assembled in the spider center portion 30 in a state where it is mounted on the bearing mount surface 30c in the assembled state as described above.

  The spider central portion 30 is provided with a fixing member 71 that fixes the upper bearing 50 (spherical bearing) to the spider central portion 30 by pressing the upper outer ring 52 from above.

  The fixing member 71 includes a cylindrical cylindrical portion 71a and a flange portion 71b extending vertically from the upper end of the cylindrical portion 71a toward the radially outer side. The outer diameter of the cylindrical portion 71 a of the fixing member 71 is provided so as to substantially match the inner diameter of the central through hole of the spider central portion 30.

  An attachment hole is formed in the flange portion 71b of the fixing member 71 so as to correspond to the screw hole 30f formed in the upper surface of the cylindrical wall portion 30b of the spider center portion 30.

  The length from the lower end of the cylindrical portion 71a to the lower end of the flange portion 71b is from the upper surface of the upper bearing 50 (spherical bearing) mounted on the bearing mount surface 30c in the assembled state to the upper surface of the cylindrical wall portion 30b. It is provided so as to substantially match the length.

  The fixing member 71 configured as described above has the cylindrical portion 71a with the flange portion 71b facing upward while the assembled upper bearing 50 (spherical bearing) is placed on the bearing mount surface 30c. Is inserted into the central through hole of the spider central portion 30. As a result, the lower end of the cylindrical portion 71a is in contact with the upper surface of the upper outer ring 52, and the lower end surface of the flange portion 71b is in contact with the upper end surface of the cylindrical wall portion 30b. In this state, the bearing fixing bolt (bearing fixing member) 72 is screwed by aligning the positions of the screw holes 30f provided in the cylindrical wall portion 30b and the mounting holes provided in the flange portion 71b. The bearing fixing bolt 72 is a member for fixing the upper bearing 50 (spherical bearing) to the spider center portion 30. As a result, the upper bearing 50 (spherical bearing) is fixed to the spider center portion 30 via the fixing member 71. From another viewpoint, the upper bearing 50 (spherical bearing) is sandwiched between the bearing mount surface 30c and the lower end of the fixing member 71 in an assembled state, and is fixed to the spider center portion 30.

  In addition, the lubricating oil supply path 30e for supplying lubricating oil to the upper bearing 50 (spherical bearing) is formed in the cylindrical wall part 30b of the spider center part 30 of this embodiment. Lubricating oil / fat is supplied to the lubricating oil / fat supply path 30e via a lubricating oil / fat supply path including an unillustrated pipe disposed so as to pass through the spider arm 31, for example. Thereby, lubricating oil can be supplied to the place (bearing chamber) where the upper bearing 50 (spherical bearing) of the central through hole is disposed.

  An attachment frame 60 is attached to the attachment frame mount portion 30d provided below the flange portion 30a of the spider center portion 30 (on the side opposite to the bearing mount surface 30c).

  Below, the attachment frame 60 and the sealing members 62 and 63 attached to this will be described in detail. FIG. 4 is a perspective view showing the configuration of the attachment frame 60 and the seal members 62 and 63 attached thereto.

  In the present embodiment, the attachment frame 60 and the seal members 62 and 63 are configured in an annular shape.

  The mounting frame 60 mainly includes a flange portion 60a and an upward projecting portion 60b projecting upward from the flange portion 60a.

  The flange portion 60a is formed in an annular plate shape. A plurality of attachment holes 60c for attaching the flange portion 60a (attachment frame 60) from below to the lower portion of the flange portion 30a of the spider center portion 30 are formed in the flange portion 60a at intervals in the circumferential direction. .

  The upper projecting portion 60b is provided in a substantially cylindrical shape so as to project upward from the inside of the flange portion 60a. The outer peripheral surface of the upper projecting portion 60b is formed in a tapered shape (tapered shape) in which the radial dimension becomes smaller toward the upper side.

  A circular through hole is formed at the center of the mounting frame 60. In the upper projecting portion 60b, a plurality of annular grooves for attaching seal members 62 and 63 described later are formed side by side along the axial direction on the inner peripheral surface of the through hole.

  Of the plurality of grooves on the inner peripheral surface of the upper protrusion 60b, the groove disposed on the side closest to the upper bearing 50 (spherical bearing) (uppermost) in the axial direction is the lubrication supplied to the upper bearing 50. A seal member 62 is attached for the purpose of preventing oils and fats from leaking.

  Among the plurality of grooves on the inner peripheral surface of the upper projecting portion 60b, a groove disposed on the side farthest (lowermost) from the upper bearing 50 (spherical bearing) in the axial direction has a foreign object (stone) A seal member 63 is attached for the purpose of preventing dust and the like from entering the upper bearing 50.

  Each of the seal members 62 and 63 is disposed such that the outer peripheral portion thereof is fitted into the groove on the inner peripheral surface of the upper protruding portion 60b. In particular, the inner diameter of the seal member 62 attached for the purpose of not leaking the lubricating oil supplied to the upper bearing 50 is set to a dimension that can surround the upper end portion of the main shaft 4 without a gap. Further, the seal member 62 has moderate elasticity, and even when the main shaft 4 performs the above-described rubbing motion, it can be tightly sealed so as to follow the outer peripheral surface of the main shaft 4 that changes the direction of the axis. it can.

  Of the grooves formed in the mounting frame 60, a groove in which a disc-shaped pressing member 64 for pressing the sealing member 63 from the lower side can be fitted below the groove into which the sealing member 63 is fitted ( Step) is formed. The presser member 64 is attached to the lower end portion of the mounting frame 60 using a bolt or the like so that the seal member 63 can be easily replaced.

  The seal member 63 is disposed on the side closest to the crushing chamber S among the plurality of seal members 62, 63, and peels off foreign matters such as stone dust adhering to the surface of the main shaft 4 when the main shaft 4 moves up and down. It is made of a material such as a resin that can be removed (scraping) and is relatively resistant to foreign substances such as stone dust. That is, the seal member 63 also has a function as a scraper.

  In the lower part of the flange part 30a of the spider central part 30, the inner wall of the central through hole is formed in a tapered shape whose diameter decreases toward the upper side so as to correspond to the shape of the upper protruding part 60b of the mounting frame 60. . Further, a screw hole is formed in the lower surface of the spider center portion 30 so as to correspond to the position of the mounting hole 60c.

  As shown in FIG. 2, when the attachment frame 60 is attached to the lower portion of the flange portion 30a of the spider center portion 30, the height h1 of the upper end of the upper protrusion 60b is lower than the height h2 of the bearing mount surface 30c. ing. Further, when the upper bearing 50 is a spherical bearing, the upper bearing 50 is arranged so as not to contact the upper end surface of the upper projecting portion 60 b of the mounting frame 60 even when the inner ring 53 rotates with the eccentric behavior of the main shaft 4. The

  With this configuration, the mounting frame 60 is fixed by screwing the mounting frame fixing bolt (mounting frame fixing member) 61 by aligning the positions of the screw holes formed on the lower surface of the spider center portion 30 and the mounting holes 60c. It can be fixed to the mounting frame mount 30d.

  Thus, in the rotary crusher 100 of this embodiment, the bearing chamber in which the upper bearing 50 that supports the main shaft 4 is accommodated, and the lower crushing chamber S (the space in which the mantle 5 and the cone cave 6 are disposed) Are blocked by seal members 62 and 63. In other words, the lower portion of the bearing chamber that houses the upper bearing 50 is sealed by the seal members 62 and 63, and the bearing chamber is blocked from the lower space. Thereby, the lubricating oil supplied to the upper bearing 50 can be prevented from leaking into the crushing chamber S below, and fine debris powder generated by crushing rocks in the lubricating oil supplied to the upper bearing 50, etc. Can be prevented. In particular, in the present embodiment, since the plurality of seal members 62 and 63 are arranged side by side along the axial direction of the main shaft 4, higher sealing performance can be maintained and the soundness of the upper bearing 50 can be maintained.

  Note that the seal members 62 and 63 are consumables, and the sealability and scraping properties are deteriorated due to wear and breakage due to aging. Therefore, the seal members 62 and 63 need to be replaced at a certain frequency. In this regard, in this embodiment, after removing the upper bearing 50 in the spider central portion 30 from the main shaft 4 together with the spider 14 as shown in FIG. The mounting frame 60 can be removed downward from the frame mount 30d) to access the seal members 62 and 63 (at this time, it is not necessary to remove the upper bearing 50 and the fixing member 71). In other words, in the configuration of the present embodiment, the seal members 62 and 63 can be exchanged without removing or disassembling the heavy bearing upper bearing 50 from the spider 14, so that maintainability can be improved.

  In the present embodiment, the mounting frame 60 is annular (integral type) as shown in FIG. 4, but is not necessarily limited to this, and as shown in FIG. 6 as a modification, a plurality of mounting frames 60 are provided in the circumferential direction. It is good also as a division type divided | segmented into. When the mounting frame 60 has a split configuration, the mounting frame 60 and the seal members 62 and 63 are removed radially outward from the spider 14 and the main shaft 4 without removing the spider 14 from the main shaft 4. There is a merit that you can also. In this case, since it is not necessary to lift the upper frame 11 and the spider 14 as shown in FIG. 5, the maintainability can be further improved. Note that when the mounting frame 60 has a split-type configuration, the seal members 62 and 63 also need to have a split-type configuration.

  As described above, the rotary crusher 100 of the present embodiment includes the spider 14, the upper bearing (bearing) 50, the main shaft 4, the mounting frame 60, and the annular seal members 62 and 63. Prepare. A bearing mount surface 30 c is formed on the spider 14. The upper bearing 50 is attached so that the lower end thereof is supported from the lower side by the bearing mounting surface 30c. The main shaft 4 is supported by the upper bearing 50 so as to be rotatable and the direction of the rotation axis can be changed. The mounting frame 60 is disposed so as to surround the outer periphery of the main shaft 4 and is fixed to the spider 14 so as to be removable downward. The annular seal members 62 and 63 are disposed between the mounting frame 60 and the main shaft 4.

  Thereby, the attachment frame 60 and the seal members 62 and 63 can be removed from the lower side of the spider 14 in a state where the upper bearing 50 is supported by the bearing mount surface 30c. Therefore, maintenance of the seal members 62 and 63 can be easily performed.

  Further, in the rotary crusher 100 of the present embodiment, the mounting frame fixing bolt 61 that fixes the mounting frame 60 to the spider 14 is the bearing fixing bolt 72 that fixes the upper bearing 50 to the spider 14. It is provided separately.

  Accordingly, the mounting frame 60 and the seal members 62 and 63 can be removed from the spider 14 by removing the mounting frame fixing bolt 61 while the upper bearing 50 is fixed to the spider 14. It is possible to reduce the number of places that need to be removed along with the maintenance of 63.

  However, in the rotary crusher 100, as shown in FIG. 3, the upper bearing 50 can be configured as a bush type bearing.

  In this case, the configuration of the bearing can be simplified.

  Moreover, in the rotary crusher 100 of this embodiment, it has the outer ring | wheels 51 and 52 and the inner ring | wheel 53 as a bearing which supports the upper part of the main axis | shaft 4, and the lower end part of what combined the outer rings 51 and 52 is a bearing mounting surface. An upper bearing 50 (spherical bearing) attached so as to be supported from below by 30c is used. The outer rings 51 and 52 include a lower outer ring 51 and an upper outer ring 52 that are coupled to each other in the vertical direction. In the rotary crusher 100, the mounting frame fixing bolt 61 that fixes the mounting frame 60 to the spider 14 is provided separately from the outer ring coupling bolt 54 that couples the lower outer ring 51 and the upper outer ring 52. It has been.

  Thus, the mounting frame 60 and the seal members 62 and 63 are removed from the spider by removing the mounting frame fixing bolt 61 while the lower outer ring 51 and the upper outer ring 52 remain coupled to each other in the upper bearing 50 (spherical bearing). 14, and it is not necessary to disassemble the upper bearing 50 (spherical bearing) with the maintenance of the seal members 62 and 63.

  Moreover, in the rotational crusher 100 of this embodiment, both the attachment frame 60 and the seal members 62 and 63 are integrally formed in an annular shape over the entire circumference.

  Thereby, the number of parts can be reduced, and the attaching and detaching work of the seal members 62 and 63 is facilitated.

  Further, in the rotary crusher 100 according to the modified example of the present embodiment, the mounting frame 60 and the seal members 62 and 63 are both configured by joining those divided into a plurality in the circumferential direction of the main shaft 4. Has been.

  This makes it possible to attach / remove the attachment frame 60 and the seal members 62, 63 to / from the main shaft 4 in the radial direction. Therefore, maintenance work is further facilitated.

  Further, the rotary crusher 100 of the present embodiment includes an attachment frame 60. The mounting frame 60 includes a flange portion 60a and an upward projecting portion 60b. The upper protruding portion 60b protrudes upward from (inside) the flange portion 60a and supports the seal members 62 and 63. In the mounting frame 60, the upper end of the upper projecting portion 60b is located at a lower height than the bearing mount surface 30c.

  Thereby, interference with the mounting frame 60 and the spherical bearing (bearing) 50 can be avoided with a simple configuration.

  Further, in the rotary crusher 100 of the present embodiment, a plurality of seal members 62 and 63 are arranged side by side in the axial direction (axial direction) of the main shaft 4.

  As a result, the space where the spherical bearing (bearing) 50 is disposed (in this embodiment, the space to which lubricating oil is supplied) is replaced with the space below the spider 14 (in this embodiment, the mantle 5 and the cone cable 6 are disposed). Can be more reliably shut off.

  Moreover, in the rotary crusher 100 of this embodiment, the outer peripheral surface of the upper protrusion part 60b of the attachment frame 60 is a taper shape where the dimension of the radial direction becomes small as it goes upwards. An attachment frame mount portion 30d, which is a portion to which the attachment frame 60 is attached, below the spider 14 is formed in a shape corresponding to the upward projecting portion 60b.

  Thereby, the outer peripheral surface of the upper projecting portion 60b is easily guided by coming into contact with the shape of the mounting frame mounting portion 30d, and the mounting frame 60 can be fitted into an appropriate place.

  Further, the mounting frame 60 of the present embodiment is fixed so as to be removable downward with respect to the spider 14 of the rotary crusher 100. The mounting frame 60 includes a flange portion 60a and an upward projecting portion 60b. The upper protruding portion 60b protrudes upward from the flange portion 60a and can support the seal members 62 and 63 on the inner side thereof. When the mounting frame 60 is fixed to the spider 14, the upper end of the upper protrusion 60b is located at a lower height than the bearing mount surface 30c.

  Accordingly, the mounting frame 60 can be fixed to the spider 14 in a state where the sealing members 62 and 63 are supported inside the mounting frame 60, and the sealing members 62 and 63 can be easily attached and detached. Further, the mounting frame 60 does not interfere with the upper bearing 50.

  Further, in the rotary crusher 100 of the present embodiment, the upper bearing 50 is placed on the bearing mount surface 30c and the mounting frame 60 is attached to the spider 14 while maintaining the assembled state of the upper bearing 50. The seal members 62 and 63 are exchanged by a method including a step of removing the seal members from the bottom.

  As a result, the number of members that need to be removed during maintenance of the seal members 62 and 63 can be reduced, and the replacement work of the seal members 62 and 63 is simplified.

  The preferred embodiment of the present invention has been described above, but the above configuration can be modified as follows, for example.

  In the above embodiment, the bearing that supports the upper end portion of the main shaft 4 is the spherical bearing 50 or the bush type bearing 50. However, the bearing is not necessarily limited to this, and other bearings may be used. In other words, the bearing only needs to be configured to support the main shaft 4 so that the main shaft 4 can rotate and the direction of the rotation axis can be changed.

  In the above embodiment, both the mounting frame 60 and the seal members 62 and 63 may be formed in an annular shape (integral type), or two divided in the circumferential direction of the main shaft 4 are coupled to each other. It may be configured as follows. However, the number of divisions is not limited to two, and it may be divided into a larger number (for example, three or four). Further, the mounting frame 60 and the seal members 62 and 63 divided into a plurality in the circumferential direction may not necessarily be divided at the same angle.

  In the above embodiment, the two seal members 62 and 63 are arranged side by side in the axial direction of the main shaft 4, but the number is not limited to this, and the number is less than or less than this. A large number of seal members may be arranged side by side in the axial direction of the main shaft 4.

  In the above embodiment, bolts are used for fixing the mounting frame 60 to the spider central portion 30, fixing the upper bearing 50 to the spider central portion 30, and coupling the outer rings 51, 52. However, the present invention is not limited to this, and the attachment frame 60 may be fixed by other known members that can be attached / removed.

4 Spindle 14 Spider 30 Spider center 30c Bearing mount surface 50 Upper bearing 60 Mounting frame 62, 63 Seal member (annular seal member)
100 Rotating crusher

Claims (10)

A spider with a bearing mounting surface formed;
A bearing attached so that the lower end portion is supported from below by the bearing mounting surface;
A main shaft supported by the bearing so as to be rotatable and the direction of the rotation axis thereof can be changed;
A mounting frame that is arranged so as to surround the outer periphery of the main shaft and is fixed to the spider so as to be removable downward;
An annular seal member disposed between the mounting frame and the main shaft;
A rotary crusher characterized by comprising: The rotary crusher according to claim 1,
A rotating crusher, wherein a mounting frame fixing member for fixing the mounting frame to the spider is provided separately from a bearing fixing member for fixing the bearing to the spider. The rotary crusher according to claim 1 or 2,
The rotary crusher characterized in that the bearing is a bush type bearing. The rotary crusher according to claim 1 or 2,
The bearing is a spherical bearing that has an outer ring and an inner ring, and is attached so that a lower end surface of the outer ring is supported from below by the bearing mounting surface,
The outer ring includes a lower outer ring and an upper outer ring that are coupled to each other in the vertical direction,
A rotative crushing characterized in that a mounting frame fixing member that fixes the mounting frame to the spider is provided separately from an outer ring coupling member that couples the lower outer ring and the upper outer ring. Machine. The rotary crusher according to any one of claims 1 to 4,
Both of the mounting frame and the seal member are integrally formed in an annular shape over the entire circumference. The rotary crusher according to any one of claims 1 to 4,
Both of the mounting frame and the seal member are configured by joining together a plurality of parts divided in the circumferential direction of the main shaft. The rotary crusher according to any one of claims 1 to 6,
The mounting frame is
A flange,
An upward projecting portion projecting upward from the flange portion to support the seal member;
With
A rotating crusher, wherein an upper end of the upper projecting portion is located at a lower height than the bearing mount surface. The rotary crusher according to any one of claims 1 to 7,
A plurality of the sealing members are arranged side by side in the axial direction of the main shaft. An attachment frame fixed so as to be removable downward with respect to the spider of the rotary crusher according to any one of claims 1 to 6,
A flange,
An upward projecting portion projecting upward from the flange portion and supporting the seal member on the inside thereof;
With
When fixed to the spider, the upper end of the upward projecting portion is positioned at a lower height than the bearing mount surface. A spider with a bearing mounting surface formed;
A bearing whose lower end is supported from below by the bearing mounting surface;
A main shaft supported by the bearing so as to be rotatable and the direction of the rotation axis thereof can be changed;
A mounting frame that is arranged so as to surround the outer periphery of the main shaft and is fixed to the spider so as to be removable downward;
An annular seal member disposed between the mounting frame and the main shaft;
A seal member replacement method in a rotary crusher comprising:
A method for replacing a seal member, comprising: a step of removing the mounting frame downward from the spider while the bearing is placed on the bearing mount surface and maintaining the assembled state of the bearing.

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