JP2019122889A - Mill and method for manufacturing mill - Google Patents

Abstract

To facilitate assembling of a mill.SOLUTION: A mill comprises: an output table 22 for rotatably driving a mill table on which objects to be milled are milled; and a transmission portion 27 for transmitting rotary drive power from the output table 22 to the mill table. The transmission portion 27 includes: an eccentric pin 29 integrally having a columnar first fitting portion 34 fitted into a first fitting hole 28 formed at the output table 22, and a columnar second fitting portion 35 extending in the same direction as the first fitting portion 34; a cylindrical eccentric bushing 30 into which the second fitting portion 35 is fitted; and a second fitting hole 31 which is formed at the mill table, and into which the eccentric bushing 30 is fitted. The eccentric pin 29 is formed so that a first central axis C1 being a central axis of the first fitting portion 34 is eccentric to a second central axis C2 being a central axis of the second fitting portion 35. The eccentric bushing 30 is formed so that a third central axis being a central axis of an outer diameter is eccentric to a fourth central axis being a central axis of an inner diameter.SELECTED DRAWING: Figure 3

Description

  The present disclosure relates to a grinder and a method of manufacturing the grinder.

  In a thermal power generation facility or the like, a carbon-containing solid fuel (hereinafter, raw material) such as coal or biomass to be used is pulverized into a fine powder by a pulverizer (mill) and supplied to a combustion device of a boiler. The mill supplies raw materials such as coal and biomass to a rotating grinding table from a coal feeding pipe disposed on the vertical upper side of the mill. Also, the supplied raw material is crushed into a fine powder by chewing between a crushing table and a crushing roller, and the pulverized fuel is classified by a classifier using the carrier gas supplied from the outer peripheral side of the crushing table, Only those with small particle size are transported to the combustion device.

  The crushing table is fixed on the output table of the reduction gear, and is rotationally driven by the motor with the vertical direction as the central axis of rotation via the reduction gear. In such a mill, in order to rotationally drive the grinding table by the motor, a transmission unit for transmitting the rotational driving force of the motor to the grinding table is provided between the reduction gear and the grinding table (for example, Patent Document 1).

JP-A-2-245246

The grinding table fixed on the output table of the reduction gear is preferably removable for maintenance. Therefore, also in the transmission part which transmits rotational power to a grinding table, it may be considered as a removable structure. For example, key grooves are provided on both sides of the crushing table side and the reduction gear side as a transmission portion of rotational power provided between the crushing table and the output table of the reduction gear, and the key groove is provided for the key groove There is something to fit.
In such a transmission unit, it is necessary to form the size of the key with high accuracy so that the key is in close contact with the key groove (about an extent that the key is struck with a hammer or the like). From the processing accuracy, at the key groove position, it is difficult to match the position of the key groove between the crushing table and the output table of the reduction gear with high accuracy, and it is difficult to manufacture the key in close contact with the groove. In order to cope with this, it is necessary to make the key large enough to carry out key alignment work such as cutting the key again at the time of installation of the crushing table and the output table of the reduction gear.

  In addition, when there are a plurality of transmission parts, the position of the key groove formed on each crushing table side and the position of the key groove formed on the reduction gear side at a plurality of locations from the processing accuracy at the time of factory manufacture. It was difficult to match the and with high accuracy. In particular, this tendency was remarkable when the grinding table became large and the length between the plurality of transmission parts became long. For this reason, when configuring a plurality of transmission units, also from this point, a key alignment operation for adjusting keys and key grooves has occurred at the site when the crushing table and the output table of the reduction gear are installed.

  In the key alignment operation, it is necessary to lift the crushing table once, but since the crushing table is heavy, a large crane or the like is required to lift it. At the time of key alignment work, after actually inserting the key into the key groove formed on the crushing table side and measuring the interference size, remove the key from the crushing table and scrape the keys little by little In order to repeat the above, long-term need for lifting equipment such as large cranes. For this reason, sharpening of the keys required skill.

  As described above, when key grooves are provided on both sides of the crushing table side and the reduction gear side, and the transmission unit for fitting the key to the key groove is formed, the key alignment operation at the site tends to be complicated. Due to this, it has been possible to contribute to prolonging the assembly time of the entire mill.

  This indication is made in view of such a situation, and it aims at providing a manufacturing method of a grinder and a grinder which can make an assembly operation easy.

In order to solve the above-mentioned subject, a manufacturing method of a grinder of this indication and a grinder adopts the following means.
A crusher according to an aspect of the present disclosure includes a crusher that crushes a material to be crushed by rotating about a rotation axis extending in the vertical vertical direction, and a drive unit that is a drive unit that rotationally drives the crusher. And at least one transmission portion positioned at a predetermined distance in the radial direction from the rotation shaft and transmitting a rotational driving force from the drive portion side member to the crushing portion, the transmission portion A first fitting hole formed in the drive unit side member, a cylindrical first fitting portion fitting in the first fitting hole, and a columnar member extending in the same direction as the first fitting portion An eccentric pin integrally provided with a second fitting portion, a cylindrical eccentric bush in which the second fitting portion is fitted, and a second fitting formed in the crushing portion and in which the eccentric bush is fitted A hole, the eccentric pin has a first central axis which is a central axis of the first fitting portion, and the second central axis A second central axis which is a central axis of the joint portion is formed to be eccentric, and the eccentric bush has a third central axis which is a central axis of the outer diameter and an inner diameter which extends in the same direction as the third central axis. It is formed to be decentered with a fourth central axis which is a central axis.

  In the above configuration, the rotational drive force from the drive unit side member is transmitted to the crushing table by the transmission unit positioned at a predetermined distance from the rotation axis in the radial direction. In the transmission unit, the rotational driving force is transmitted to the eccentric pin via the first fitting portion fitted to the first fitting hole. The rotational driving force transmitted to the eccentric pin is transmitted to the eccentric bush fitted to the second fitting portion of the eccentric pin. The rotational driving force transmitted to the eccentric bush is transmitted to the crushing portion through the second fitting hole fitted to the eccentric bush. In this manner, the rotational driving force of the drive unit side member is transmitted to the crushing unit. Here, the position where the transmission part is provided is determined by the rotational driving force and the mechanical strength of the transmission part. Further, in the drive unit side member, the transmission unit is provided on the outer peripheral side of the drive unit side member.

  In the above configuration, the eccentric pin is a first central axis that is a central axis of the first fitting portion that fits in the first fitting hole, and a central axis that is a central axis of the second fitting portion that fits in the eccentric bush. The two central axes are formed to be eccentric. The eccentric bush is formed so that the third central axis which is the central axis of the outer diameter and the fourth central axis which is the central axis of the inner diameter are eccentric. Thereby, in a state in which the eccentric pin and the eccentric bush are fitted, the eccentric pin and / or the eccentric bush are rotated around their respective central axes, thereby the first central axis of the first fitting portion and the eccentric bush Adjust the amount of eccentricity with the third central axis of the outer diameter (that is, the distance between the first central axis of the first fitting portion and the third central axis of the outer diameter of the eccentric bush) It can be done. Therefore, in the case where the central axis of the first fitting hole and the central axis of the second fitting hole are separated, for example, by increasing the size of the crushing portion and increasing the distance between the rotary shaft of the crushing portion and the transmitting portion. However, even in this case, the eccentric pin and / or the eccentric bush are rotated about their respective central axes, so that the first central axis of the first fitting portion of the eccentric pin and the third diameter of the outer diameter of the eccentric bush By adjusting the amount of eccentricity (separation distance) with the central axis, the first fitting portion of the eccentric pin is fitted to the first fitting hole, and the eccentric bush is fitted to the second fitting hole. Can be combined to form a transmission unit. Thus, even if the central axis of the first fitting hole and the central axis of the second fitting hole are separated, the eccentric pin and / or the eccentric bush are rotated around each central axis. Since the transmission unit can be easily configured by itself, the assembly operation of the crusher can be facilitated.

  Further, in the above configuration, the transmission portion can be configured only by fitting the eccentric pin and the eccentric bush, so that no special tool or the like is used when configuring the transmission portion. In addition, the eccentric pin and the eccentric bush are not machined and dimensioned. Therefore, the on-site assembly operation of the crusher can be facilitated.

  In addition, the first fitting portion of the eccentric pin fits in the first fitting hole, the second fitting portion of the eccentric pin fits in the eccentric bush, and the eccentric bush fits in the second fitting hole Then, these positional relationships are uniquely determined. That is, the first fitting portion of the eccentric pin fits in the first fitting hole, the second fitting portion of the eccentric pin fits in the eccentric bush, and the eccentric bush fits in the second fitting hole In this state, the eccentric pins and the eccentric bushes restrict each other's movement, so that they do not rotate around their respective central axes to cause positional deviation. Thus, the rotational drive force can be reliably transmitted from the drive unit side member to the crushing unit.

  Further, in the crusher according to one aspect of the present disclosure, a restricting portion configured to restrict relative movement in a direction orthogonal to the central axis of the rotation axis in the horizontal plane of the drive portion side member and the crushing portion You may provide in the inner peripheral side rather than the said transmission part with respect to a central axis.

In the configuration described above, the restricting portion restricts relative movement in the direction orthogonal to the central axis of the rotation axis in the horizontal plane between the driving portion side member and the crushing portion.
When the assembly work of the crusher is performed, for example, the relative relative movement between the drive unit side member and the crushing unit in the horizontal direction is restricted by the restricting unit by the fitting structure of the recess and the projection, and the drive unit side member and the crushing unit The transmission unit may be configured by keeping the rotation centers of the two in agreement. In such a case, the relative movement of the rotation center between the drive unit side member and the crushing unit is restricted on the inner peripheral side of the transmission unit with respect to the central axis of the rotation shaft, thereby forming the transmission unit. In this case, priority can be given to the alignment of the rotation center of the crushing unit. Moreover, for this reason, it is not possible to move the entire crushing unit for alignment. Therefore, when the crushing part becomes large and the distance between the rotation shaft of the crushing part and the transmission part becomes long, the configuration of the transmission part may be deviated due to an error within the accuracy at the time of manufacture (for example, the first fitting) In the case where misalignment occurs between the joint hole position and the second fitting hole position), some correction work or the like is required on the site, and the work of configuring the transmission unit may be complicated.
In the above configuration, the first fitting hole position and the second fitting are performed in a state in which the restricting portion restricts the relative movement of the driving portion side member and the crushing portion in the horizontal direction when assembling the crusher. Eccentric pin and / or eccentricity even when the position of the hole deviates (for example, when the central axis of the first fitting hole and the central axis of the second fitting hole are separated) By rotating the bush, the transmission part can be easily configured without performing special additional processing.

  In the crusher according to one aspect of the present disclosure, a plurality of the transmission units may be provided, and the plurality of transmission units may be arranged at equal intervals concentrically around the rotation axis.

  In the above configuration, the plurality of transmission units are arranged at equal intervals concentrically around the rotation axis. As a result, when the rotational driving force is transmitted to the crushing part, the load amount of the load is reduced in each transmission part to improve the reliability of each transmission part, and the load is equally distributed in each transmission part. Become. Therefore, the crushing unit can be stably rotated.

  Further, in the crusher according to one aspect of the present disclosure, the second fitting hole may be a through hole penetrating vertically and vertically.

  In the above configuration, the second fitting hole formed in the crushing portion is a through hole which penetrates in the vertical vertical direction. Thus, the eccentric pin and the eccentric bush can be fitted in the first fitting hole and the second fitting hole so as to insert the second fitting hole from the vertically upper side when configuring the transmission unit. In addition, since the eccentric pin and the eccentric bush can be accessed from the vertically upper side, the eccentric pin and the eccentric bush can be rotated around their respective central axes. As a result, the workability can be improved and the transmission unit can be easily configured. In addition, since the eccentric pin and the eccentric bush can be easily accessed, the maintenance workability at the time of removing and reattaching the eccentric pin and the eccentric bush can be improved when the crushing portion is maintained. .

  In addition, the crusher according to one aspect of the present disclosure may include a closing portion that closes the second fitting hole from vertically above.

  The pulverizer vibrates a pulverizing unit or the like when pulverizing a material to be pulverized. In the above-mentioned composition, the closure part which closes the 2nd fitting hole from the perpendicular upper part is provided. As a result, even when the crusher vibrates, the closing portion can prevent the eccentric pin and the eccentric bush from coming out vertically upward from the second fitting hole.

  Further, in the crusher according to one aspect of the present disclosure, a protrusion that protrudes vertically upward may be formed on the upper end of the eccentric pin.

  In the above configuration, the protrusion is formed on the upper end of the eccentric pin. As a result, when rotating the eccentric pin around the first central axis and the second central axis, the worker can easily and reliably rotate the main body by gripping the projection. Therefore, the workability at the time of comprising a transmission part can be improved.

  Further, in the crusher according to one aspect of the present disclosure, a recess or an opening extending radially outward may be formed on the inner circumferential surface of the eccentric bush.

  In the above configuration, the eccentric bush inner circumferential surface is formed with a recess or opening extending radially outward. Thus, when rotating the eccentric bush around the third central axis and the fourth central axis, the worker engages the tool or the like in the recess or opening from the inner peripheral surface side of the eccentric bush, so that it is easy and reliable. Can be rotated. Therefore, the workability at the time of comprising a transmission part can be improved. In addition, when removing the eccentric bush from the second fitting hole at the time of maintenance or the like, the worker can easily remove the eccentric bush from the inner peripheral surface side by engaging a tool or the like with the recess or opening. Can.

  In the crusher according to one aspect of the present disclosure, the eccentric pin may be formed with an engagement portion engageable with a removal tool.

  In the above configuration, the engaging portion is formed on the eccentric pin. For example, the engaging portion may be formed on the upper end surface of the projecting portion of the eccentric pin. Thus, the eccentric pin can be easily and reliably removed from the first fitting hole by causing the worker to engage the removing tool or the like at the engaging portion at the time of maintenance or the like.

  Further, in the crusher according to one aspect of the present disclosure, a groove extending in the vertical up-down direction is formed on the outer peripheral surface of the eccentric pin over the outer peripheral surfaces of the first fitting portion and the second fitting portion. It may be

  In the above-mentioned configuration, the groove is formed on the outer peripheral surface of the eccentric pin fitted in the bottomed recessed first fitting hole which is not penetrated. Thus, when the first fitting portion of the eccentric pin is fitted into the first fitting hole, the air in the first fitting hole passes through the groove and is discharged to the outside of the first fitting hole. Be done. Therefore, since the first fitting portion and the first fitting hole can be easily fitted, the transmission portion can be easily configured.

  In the method of manufacturing a crusher according to one aspect of the present disclosure, a groove extending in the vertical vertical direction is formed on the outer peripheral surface of the eccentric pin over the outer peripheral surfaces of the first fitting portion and the second fitting portion. The grinder according to any one of claims 1 to 8, wherein

  A crushing unit that crushes a material to be crushed by rotating about a rotation axis extending in the vertical vertical direction, a drive unit side member that is a drive unit side that rotationally drives the crushing unit, and a predetermined radial direction from the rotation shaft A method of manufacturing a crusher, comprising: at least one transmission unit positioned at a distance from each other and transmitting a rotational drive force from the drive unit side member to the crushing unit, the transmission unit comprising A first fitting hole formed in the driving unit side member, a cylindrical first fitting portion to be fitted into the first fitting hole, and a cylindrical second fitting portion extending in the same direction as the first fitting portion An eccentric pin integrally provided with a fitting portion, a cylindrical eccentric bush in which the second fitting portion is fitted, and a second fitting hole formed in the crushing portion and in which the eccentric bush is fitted And the eccentric pin has a first central axis, which is a central axis of the first fitting portion, and the second fitting. A second central axis, which is a central axis of the part, so as to be eccentric, and the eccentric bush has a third central axis which is a central axis of the outer diameter and a center of an inner diameter extending in the same direction as the third central axis An eccentric bush inserting step of eccentrically forming a shaft with a fourth central axis and inserting the eccentric bush into the second fitting hole; and a second fitting of the eccentric pin to the eccentric bush A second fitting portion inserting step for inserting a second portion, the eccentric pin and the eccentric bush as the first central axis, the second central axis, the third central axis, and the fourth central axis The method further comprises the steps of: rotating about the axis of rotation; and engaging the first engaging portion of the eccentric pin with the first engaging hole by the rotating step.

  According to the present disclosure, the assembly operation of the crusher can be facilitated.

1 is a longitudinal sectional view showing a crusher according to an embodiment of the present disclosure. It is a schematic plan view which shows the output table of FIG. It is a typical longitudinal cross-sectional view which shows the transmission part of FIG. It is a perspective view which shows the eccentric pin of FIG. It is the top view and principal part enlarged view of the eccentric pin of FIG. It is a perspective view which shows the eccentric bush of FIG. It is a schematic diagram which shows the structure method of the transmission part of FIG. It is a schematic diagram which shows the structure method of the transmission part of FIG. It is a schematic diagram which shows the structure method of the transmission part of FIG. It is a typical longitudinal cross-sectional view which shows the transmission part of FIG. 1, Comprising: The state which the central axis of a 1st fitting hole and the central axis of a 2nd fitting hole have separated is shown.

Hereinafter, an embodiment of a crusher and a method of manufacturing the crusher according to the present disclosure will be described with reference to the drawings.
Hereinafter, embodiments of the present invention will be described with reference to FIGS. 1 to 9. In the present embodiment, the upper side indicates the vertically upward direction, and the lower side indicates the vertically downward direction.
As shown in FIG. 1, the crusher 1 according to the present embodiment includes a cylindrical hollow housing 2 which forms an outer shell of the crusher 1 and a lower side surface of the housing 2 so as to convey the inside of the housing 2. And an air supply duct 3 for supplying a gas (see the arrow in FIG. 1). Inside the housing 2, a pulverizing table (pulverizing unit) 4 rotatable about a rotation axis R1 along the vertical vertical direction, and a solid fuel containing carbon such as coal or biomass fuel on the pulverizing table 4 And a grinding roller 5 for grinding the raw material, which is a substance). The crusher 1 is disposed outside the housing 2 and connected to a motor (drive unit) (not shown) that is a drive source of the crush table 4 and below the crush table 4 to connect the motor and the crush table 4 And a reduction gear (drive unit side member) 6 for reducing the number of rotations of the motor and transmitting it to the crushing table 4.

  The housing 2 has a cylindrical side surface 2 a defining the side of the housing 2, a ceiling surface 2 b defining the upper end of the housing 2 in the vertical direction, and a bottom 2 c defining the lower end of the housing 2. A cylindrical solid fuel supply pipe 7 is provided in the upper central portion of the housing 2 so as to penetrate the ceiling surface 2 b of the housing 2. The solid fuel supply pipe 7 supplies the raw material into the housing 2 from a solid fuel supply device (not shown), and extends to the central position of the housing 2 along the vertical vertical direction. A rotary separator 8 is provided on the outer periphery of the solid fuel supply pipe 7 in the direction orthogonal to the longitudinal direction. The raw material is pulverized into fine powder, and the pulverized fuel is classified by the carrier gas supplied from the outer peripheral side of the pulverizing table 4 by the rotary separator 8, and the finely pulverized fuel of a predetermined size or less is discharged to the outside of the housing 2 Four outlet ports 9 are provided on the ceiling surface 2 b of the housing 2.

The grinding table 4 is connected to the motor via the reduction gear 6 and has a substantially circular shape that is rotatably fixed to the upper end of the rotation support 15 and the upper end of the rotation support 15. And a tabular table portion 16.
The rotation support portion 15 includes a substantially annular support portion 15a for supporting the outer peripheral portion of the table portion 16, a substantially cylindrical cylindrical portion 15b extending downward from an inner peripheral portion of the support portion 15a, and a lower end of the cylindrical portion 15b. And a flange portion 15c which extends a predetermined distance radially inward.

  The support portion 15 a has an inner peripheral portion formed in a substantially planar shape, and an outer peripheral portion curved upward. The cylindrical portion 15 b forms a space S inside. The flange portion 15 c is placed on an output table 22 of the reduction gear 6 described later, and is joined to the reduction gear 6 via the transmission unit 27. Details of the transmission unit 27 will be described later. Further, at the lower end portion of the inner peripheral end portion of the flange portion 15c, a recessed portion 15d which is recessed outward in the radial direction is formed. The recess 15 d is formed over the entire area in the circumferential direction of the flange portion 15 c. Further, the second fitting holes 31 penetrating in the vertical direction of the flange portion 15c are formed at positions separated by a predetermined distance in the radial direction from the rotation axis R1 on the outer peripheral side than the concave portion 15d of the flange portion 15c. In the present embodiment, for example, two are formed. Here, the position where the second fitting hole 31 is provided is determined by the rotational driving force from the reduction gear 6 and the mechanical strength of the transmission unit 27, and the second fitting hole 31 for installing the transmission unit 27 is the reduction gear 6 is provided on the outer peripheral side of the output table 22.

  The table portion 16 is disposed to face the lower end portion of the solid fuel supply pipe 7 on the vertically lower side, and rotates together with the rotation support portion 15. Further, the upper surface of the table portion 16 extends in the horizontal direction, and has an inclined shape in which the central portion is vertically higher than the outer side and the height is reduced from the central portion to the outer side. It curves upward again. The outer end of the grinding table 4 is not in contact with the inner surface of the side surface 2 a of the housing 2, and a gap is open between the grinding table 4 and the side surface 2 a of the housing 2.

  The grinding roller 5 is disposed vertically above the outer peripheral portion of the table portion 16 so as to face the upper surface of the table portion 16. The grinding roller 5 is fixed to the housing 2 via the first support shaft 17, the support arm 18 and the second support shaft 19. The grinding roller 5 is rotatably supported at the tip of the first support shaft 17 via a bearing (not shown). That is, the pulverizing roller 5 is rotatably supported in an inclined state in which the upper side is directed to the center side of the housing 2 more vertically than the pulverizing table 4 than the lower side. When the pulverizing table 4 rotates in a state where the outer peripheral surface is in contact with the upper surface of the pulverizing table 4, the pulverizing roller 5 can be rotated by receiving rotational force from the pulverizing table 4. However, when actually pulverizing the raw material, a gap of several mm is set between the pulverizing roller 5 and the upper surface of the table portion 16, and the pulverizing roller 5 is rotated by catching the raw material.

The reduction gear 6 is connected to the motor by a drive shaft (not shown) for rotation, and has a gear portion 21 for reducing the number of rotations of the motor, and an output table 22 which is disposed above the gear portion 21 and is connected to the gear portion 21 for rotation. And.
The output table 22 has a substantially circular plate shape, and rotates clockwise in a top view about a rotation axis R1 along the vertical vertical direction by the rotational driving force transmitted through the gear portion 21. At the approximate center of the upper surface of the output table 22, a projecting portion 22a having a substantially circular shape in plan view projecting upward is formed. Further, on the outer peripheral side of the upper surface of the output table 22, a first fitting hole 28 having a substantially circular cross section which is recessed downward is formed concentrically with the rotation axis R1 of the output table 22 as a center, more preferably rotating. A plurality of (two in the present embodiment) are formed at equal intervals concentrically about the axis R1.

Next, a bonding mode of the grinding table 4 and the reduction gear 6 will be described in detail.
The grinding table 4 and the reduction gear 6 are joined by the restriction portion 26 and the transmission portion 27.
The restricting portion 26 is configured of a recess 15 d provided in the flange portion 15 c of the grinding table 4 and a protrusion 22 a provided on the output table 22 of the reduction gear 6. The restricting portion 26 is fixed so that the outer peripheral portion of the protruding portion 22a is fitted into the recessed portion 15d, and has a so-called inlay structure. Therefore, in the restriction portion 26, the relative movement of the reduction gear 6 and the crushing table 4 in the direction orthogonal to the rotation axis R1 in the horizontal plane is achieved by the side surface of the recess 15d contacting the side surface of the protrusion 22a. The rotation centers of the reduction gear 6 and the grinding table 4 are regulated to be in agreement with each other. Further, in the regulating portion 26, the relative movement between the reduction gear 6 and the crushing table 4 in the vertical vertical direction is regulated by the contact of the upper surface of the recess 15d with the upper surface of the outer peripheral portion of the projecting portion 22a. Since the restriction portion 26 between the reduction gear 6 and the grinding table 4 is restricted on the inner peripheral side relative to the transmission portion 27 with respect to the rotation axis R1, priority is given to alignment of the rotation center of the grinding table 4.

  In the present embodiment, as shown in FIG. 2, the transmission unit 27 is formed concentrically around the rotation axis R1 of the crushing table 4 and the output table 22. More preferably, a plurality (two, for example, in the present embodiment) of concentric circles around the rotation axis R1 are equally spaced, and they are point-symmetrically arranged based on the rotation axis R1. Further, the two transmission parts 27 are separated by a distance L (in the present embodiment, a large crusher is assumed, for example, 0.8 m to 2 m). The transmission unit 27 regulates the relative movement of the output table 22 of the reduction gear 6 and the crushing table 4 in the rotational direction. That is, the transmission unit 27 transmits the rotational driving force of the output table 22 to the crushing table 4. At this time, the two transmission parts 27 reduce the load of rotational power to improve the reliability, and the load between the two transmission parts 27 is equally distributed.

  Further, as shown in FIG. 3, the transmission portion 27 has a first fitting hole 28 formed in the output table 22 of the reduction gear 6, an eccentric pin 29 fitted in the first fitting hole 28, and an inner portion A cylindrical eccentric bush 30 in which the eccentric pin 29 is fitted, a second fitting hole 31 formed in the flange portion 15c of the grinding table 4 for fitting the eccentric bush 30, and the second fitting hole 31 upward And a pressure plate (closing portion) 32 closed from the lower side.

The first fitting hole 28 does not penetrate the output table 22, and is in the form of a bottomed substantially concaved bottomed concave portion that is recessed downward.
The second fitting hole 31 is a through hole penetrating the flange portion 15 c in the vertical direction. That is, the upper opening of the second fitting hole 31 is open to the space S formed inside the cylindrical portion 15b. Further, the diameter of the second fitting hole 31 is larger than the diameter of the first fitting hole 28.

  As shown in FIGS. 3 and 4, the eccentric pin 29 has a cylindrical first fitting portion 34 fitted in the first fitting hole 28, and a cylindrical shape extending upward from the upper end of the first fitting portion 34. Metal integrally including a second fitting portion 35, a cylindrical small diameter portion 36 extending upward from the upper end of the second fitting portion 35, and a projection 37 projecting upward from the upper end of the small diameter portion 36 It is a manufactured member.

  The outer diameter of the first fitting portion 34 is smaller than the outer diameter of the second fitting portion 35, and is slightly smaller than the diameter of the first fitting hole 28. The fitting portion 34 and the first fitting hole 28 are fitted in a clearance. In addition, the length in the vertical direction of the first fitting portion 34 is formed to be substantially the same as or slightly shorter than the height of the concaved first fitting hole 28 with a bottom. The first fitting portion 34 fits such that the outer peripheral surface 34 a is in contact with the side surface of the first fitting hole 28.

  The outer diameter of the second fitting portion 35 is larger than the outer diameter of the first fitting portion 34 and is slightly smaller than the inner diameter of the eccentric bush 30. And the inner peripheral surface 30b of the eccentric bush 30 are in a state of being fitted in a clearance. The length in the vertical direction of the second fitting portion 35 is formed shorter than the height of the eccentric bush 30, and a small diameter portion 36 is formed at the top. The second fitting portion 35 fits with the eccentric bush 30 such that the outer circumferential surface 35 a is in contact with the inner circumferential surface 30 b of the eccentric bush 30.

The first central axis C1 of the first fitting portion 34 and the second central axis C2 of the second fitting portion 35 extend in the same direction. The first fitting portion 34 and the second fitting portion 35 are arranged such that, when viewed in plan, parts of the outer peripheries of the first fitting portion 34 and the second fitting portion 35 overlap in the axial direction of the first central axis C1 and the second central axis C2. ing. That is, the outer peripheral surface 34a of the first fitting portion 34 and the outer peripheral surface 35a of the second fitting portion 35 are formed to be flush with each other in part (in FIGS. 3 and 10, they are flush with each other). Section of the
Further, as shown in FIG. 3, the first central axis C1 of the first fitting portion 34 and the second central axis C2 of the second fitting portion 35 are separated by a predetermined distance and formed to be eccentric. It is done. The predetermined distance for eccentricity is, for example, the central axis of the first fitting hole 28 and the second fitting because the pulverizer 1 is enlarged and the distance between the rotation axis R1 of the output table 22 and the transmission unit 27 is long. It is set supposing the range which a central axis of hole 31 separates.

  The small diameter portion 36 has the same central axis as the second central axis C2 of the second fitting portion 35, and the outer diameter is smaller than the outer diameter of the second fitting portion 35. That is, the outer peripheral surface 36 a of the small diameter portion 36 is separated from the inner peripheral surface 30 b of the eccentric bush 30. The length of the small diameter portion 36 in the vertical direction is formed so that the upper end portion of the small diameter portion 36 protrudes from the pressing plate 32 when the transmission portion 27 is configured.

  The projecting portion 37 projects upward from the central region of the small diameter portion 36. Moreover, the protrusion part 37 is a substantially rectangular parallelepiped shape by which the plane part was formed in the side, Comprising: It is carrying out the shape which dropped the corner | angular part of the rectangular parallelepiped. The operator grasps the projection 37 to rotate the eccentric pin 29 around each central axis. In a substantially central region of the upper surface of the projecting portion 37, an engaging portion 38 recessed downward is formed. The inner peripheral surface of the engaging portion 38 is formed with a configuration (for example, a screw groove or the like) that can be engaged with a removal tool (for example, an eyebolt or the like) (not shown).

  Further, as shown in FIG. 5, the eccentric pin 29 is formed with a groove 39 extending in the vertical direction. The groove 39 is formed so as to be recessed inward in the radial direction on the surface where the outer peripheral surface 34 a of the first fitting portion 34 and the outer peripheral surface 35 a of the second fitting portion 35 are flush with each other. Further, at least one groove 39 is formed over the entire length of the flush surface. In FIG. 5, the protrusion 37 is omitted for the sake of illustration. When the first fitting portion 34 of the eccentric pin 29 is fitted into the bottomed recessed first fitting hole 28 which does not penetrate, the air in the first fitting hole 28 passes through the groove 39. And is discharged to the outside of the first fitting hole 28.

The eccentric bush 30 is a cylindrical metal member as shown in FIGS. 3 and 6, and the second fitting hole 31 and the outer peripheral surface 30a are in contact with the side surface of the second fitting hole 31. To fit. The eccentric bush 30 is formed so that the third central axis, which is the central axis of the outer diameter, and the fourth central axis, which is the central axis of the inner diameter, are eccentric. The third central axis and the fourth central axis extend in the same direction. In other words, in the plan view, the eccentric bush 30 is eccentric with the third central axis and the fourth central axis separated by a predetermined distance. Therefore, the eccentric bush 30 is formed such that the plate thickness is not uniform but the plate thickness gradually changes when the cross section in the horizontal direction is viewed.
The predetermined distance for eccentricity is, for example, the central axis of the first fitting hole 28 and the second fitting because the pulverizer 1 is enlarged and the distance between the rotation axis R1 of the output table 22 and the transmission unit 27 is long. It is set supposing the range which a central axis of hole 31 separates.
A notch (a recess or an opening) 40 is formed on the lower surface of the eccentric bush 30. The notch 40 is formed to connect the inner circumferential surface 30 b of the eccentric bush 30 to the outer circumferential surface 30 a. The worker can easily remove the eccentric bush 30 by engaging a tool or the like in the notch 40.

  As shown in FIG. 3, the pressing plate 32 is a plate-like member, and a circular central opening 41 through which the projecting portion 37 of the eccentric pin 29 is inserted is formed in a substantially central region. The diameter of the central opening 41 is larger than the protrusion 37 and smaller than the small diameter portion 36. That is, since the presser plate 32 closes a part of the upper opening of the second fitting hole 31 from the upper side, the eccentric pin 29 and the eccentric bush 30 do not come out of the second fitting hole 31 upward. . Further, the pressing plate 32 is fixed to the flange portion 15 c of the grinding table 4 by bolts 42.

  Next, a method of joining the crushing table 4 and the reduction gear 6, which is a part of the assembling operation of the crushing machine 1, will be described in detail.

  First, the rotary support 15 of the crushing table 4 is lifted by a crane or the like, and placed on the output table 22 of the reduction gear 6. At this time, the restricting portion 26 is configured by placing the recessed portion 15 d of the rotation supporting portion 15 and the protruding portion 22 a of the output table 22 so as to be fitted. At this time, the table portion 16 is not attached to the rotation support portion 15 yet. Since the table portion 16 is not attached to the rotation support portion 15, the space S in the rotation support portion 15 allows workers and the like to enter and leave. Therefore, in the space S, it is possible for the worker to perform the operation of configuring the transmission unit 27 described below.

  Next, the transmission unit 27 is configured. A method of configuring the transmission unit 27 will be described with reference to FIGS. 7 to 9. 7-9, the code | symbol C3 shows the central axis of the 1st fitting hole 28, and the code | symbol C4 shows the central axis of the 2nd fitting hole 31. As shown in FIG. Moreover, the code | symbol 30b 'of FIG. 8 shows the position of the internal peripheral surface of eccentric bushing 30 before making it rotate.

  The transmission unit 27 can be configured, for example, according to the following procedure. First, the positions of the first fitting hole 28 and the second fitting hole 31 are adjusted so that all of the first fitting hole 28 can be seen from the second fitting hole 31 when viewed from above. Next, the eccentric bush 30 is inserted into the second fitting hole 31, and the second fitting hole 31 and the eccentric bush 30 are fitted (eccentric bush inserting step). The eccentric bush 30 and the second fitting hole 31 are fitted with a gap fit, and at this stage, the eccentric bush 30 is fitted so as to be able to rotate in the second fitting hole 31.

  Next, the eccentric pin 29 is inserted into the eccentric bush 30 (second fitting portion insertion step). The eccentric pin 29 is inserted such that the first fitting portion 34 is at the bottom. At this time, the first fitting portion 34 interferes with the upper surface of the output table 22 and is not fitted to the first fitting hole 28 (see FIG. 7). Further, the eccentric pin 29 and the eccentric bush 30 are fitted with a gap fit, and at this stage, the eccentric pin 29 can be rotated around the first central axis C1 and the second central axis C2 in the eccentric bush 30. Is fitted to.

  Next, the eccentric bush 30 into which the first fitting portion 34 is inserted is rotated about the third central axis and the fourth central axis in the horizontal direction as shown by the arrow in FIG. Adjust the (rotation step). Next, the eccentric pin 29 is rotated about the first central axis C1 and the second central axis C2 in the horizontal direction as shown by the arrow in FIG. 9 to adjust the position of the eccentric pin 29 (rotation step). The eccentric bush 30 and the eccentric pin 29 may be adjusted by rotating the eccentric bush 30 and the eccentric pin 29 simultaneously. Further, the adjustment by the eccentric bush 30 and the adjustment by the eccentric pin 29 may be alternately repeated plural times.

  By adjusting the eccentric bush 30 and the eccentric pin 29, the first central axis C1 of the first fitting portion 34 of the eccentric pin 29 and the central axis C3 of the first fitting hole 28 are aligned. After the first central axis C1 of the first fitting portion 34 of the eccentric pin 29 and the central axis C3 of the first fitting hole 28 coincide with each other, the eccentric pin 29 is inserted into the first fitting hole 28, 29 and the first fitting hole 28 are fitted (fitting step). When the first fitting portion 34 is fitted in the first fitting hole 28, the eccentric pin 29 and the eccentric bush 30 restrict the movement of each other, so that they can not rotate.

  After the eccentric pin 29 is inserted into the first fitting hole 28 and the eccentric pin 29 and the first fitting hole 28 are fitted, the pressing plate 32 is attached to the flange portion 15 c. The pressing plate 32 is disposed so as to pass through the central opening 41 in which the projecting portion 37 is formed at the center, and is attached to the flange portion 15 c by the bolt 42. Thus, the transmission unit 27 is configured.

  When the transmission unit 27 is configured, the worker comes out of the space S, and thereafter, the table unit 16 is fixed to the support unit 15a. Thus, the grinding table 4 and the reduction gear 6 are joined. In addition, when comprising transmission part 27, you may change a procedure suitably, without being limited to said procedure.

According to the present embodiment, the following effects are achieved.
In the present embodiment, the rotational drive force from the output table 22 is transmitted by the transmission unit 27 positioned in a predetermined radial direction from the rotation axis R1. In the transmission portion 27, the rotational drive force is transmitted to the eccentric pin 29 via the first fitting portion 34 fitted to the first fitting hole 28. The rotational driving force transmitted to the eccentric pin 29 is transmitted to the eccentric bush 30 engaged with the second fitting portion 35 of the eccentric pin 29. The rotational driving force transmitted to the eccentric bush 30 is transmitted to the grinding table 4 via the second fitting hole 31 fitted to the eccentric bush 30. Thus, the rotational driving force of the output table 22 of the reduction gear 6 is transmitted to the crushing table 4.

  Further, the eccentric pin 29 is a first central axis C1 which is a central axis of the first fitting portion 34 fitted in the first fitting hole 28 and a central axis of the second fitting portion 35 fitted in the eccentric bush 30. The second central axis C2 is formed so as to be decentered. The eccentric bush 30 is formed so that the third central axis, which is the central axis of the outer diameter, and the fourth central axis, which is the central axis of the inner diameter, are eccentric. Thereby, in a state in which the eccentric pin 29 and the eccentric bush 30 are fitted, the first engaging portion 34 can be rotated by rotating the eccentric pin 29 and / or the eccentric bush 30 around their respective central axes. An eccentricity amount between the central axis C1 and the third central axis of the outer diameter of the eccentric bush 30 (ie, the first central axis C1 of the first fitting portion 34 and the third central axis of the outer diameter of the eccentric bush 30) The distance can be adjusted to obtain a desired amount of eccentricity. Therefore, the grinding table 4 is enlarged, and the distance between the rotation axis R1 of the grinding table 4 and the transmission unit 27 is increased, so that the grinding table 4 and the speed reducer, for example, as shown in FIG. In the case where the central axis C3 of the first fitting hole 28 and the central axis C4 of the second fitting hole 31 which are holes for connecting 6 and 6 are separated by a predetermined distance (the distance α in FIG. 10) (That is, there is a gap between the center of the first fitting hole 28 which is a hole for connecting the crushing table 4 and the reduction gear 6 and the center of the second fitting hole 31). , And the eccentric pin 29 and / or the eccentric bush 30 are rotated about their respective central axes to make the first central axis C1 of the first fitting portion 34 of the eccentric pin 29 and the third center of the outer diameter of the eccentric bush 30 By adjusting the amount of eccentricity (distance) with the shaft, With fitting the first fitting portion 34 of the heart pin 29, the eccentric bushing 30 is fitted to the second fitting hole 31, it is possible to construct a transmission unit 27. Thus, even when the central axis C3 of the first fitting hole 28 and the central axis C4 of the second fitting hole 31 are separated, the eccentric pin 29 and / or the eccentric bush 30 can be Since the transmission portion 27 can be easily configured only by rotating around the central axis, the assembling operation of the crusher 1 can be facilitated.

  Moreover, since the transmission part 27 can be comprised only by fitting the eccentric pin 29 and the eccentric bush 30, when constructing the transmission part 27, a special tool etc. are not used. In addition, the eccentric pin 29 and the eccentric bush 30 are not machined and dimensioned. Therefore, the assembly operation of the crusher 1 can be facilitated.

  In addition, the first fitting portion 34 of the eccentric pin 29 fits into the first fitting hole 28, the second fitting portion 35 of the eccentric pin 29 fits into the eccentric bush 30, and the eccentric bush 30 When the two fitting holes 31 are fitted, these positional relationships are uniquely determined. That is, the first fitting portion 34 of the eccentric pin 29 fits into the first fitting hole 28, the second fitting portion 35 of the eccentric pin 29 fits into the eccentric bush 30, and the eccentric bush 30 In the state of being fitted in the two fitting holes 31, the eccentric pins 29 and the eccentric bushes 30 restrict each other's movement, so that they do not rotate around their respective central axes to generate positional deviation. Thus, the rotational drive force can be reliably transmitted from the output table 22 to the crushing table 4.

Further, the restricting portion 26 restricts relative movement in the direction orthogonal to the central axis of the rotation axis R1 in the horizontal plane of the output table 22 and the rotation support portion 15 of the crushing table 4. That is, the regulating unit 26 regulates the relative sliding movement of the output table 22 and the rotation support unit 15 of the crushing table 4.
In the present embodiment, relative sliding movement between the output table 22 and the rotary support 15 of the crushing table 4 is restricted by the fitting structure of the recess and the convex part, etc., and the rotation centers of the output table 22 and the crushing table 4 are aligned. The transmission unit 27 is configured in a state where it is allowed to move. In such a case, the relative movement of the rotation center of the first fitting hole 28 and the second fitting hole 31 is restricted on the inner peripheral side (that is, the rotation center axis side) relative to the central axis with respect to the central axis. As a result, when the transmission unit 27 is configured, priority is given to the alignment of the rotation center of the output table 22, so that the rotation accuracy can be secured and stable rotation can be obtained. Therefore, by increasing the size of the crusher 1 and increasing the distance between the rotation axis R1 of the crush table 4 and the transmission portion 27, the first fitting hole 28 and the second fitting are caused due to an error within the accuracy at the time of manufacture. There may be a case where a shift occurs in the relative position with the hole 31 (that is, when the central axis C3 of the first fitting hole 28 and the central axis C4 of the second fitting hole 31 are separated). In particular, as in the present embodiment, the crushing machine 1 is large, the crushing table 4 is large, and the distance between the rotation axis R1 of the crushing table 4 and the transmission unit 27 is long. The center axis C3 of the first fitting hole 28 and the center axis C4 of the second fitting hole 31 may be separated from each other to cause a deviation. Similarly, in the case where there are a plurality of transmission units 27, when the distance L between the plurality of transmission units 27 is far, a deviation easily occurs.
However, since the relative movement between the output table 22 and the rotary support 15 of the crushing table 4 is restricted, the output table 22 or the rotary support 15 is moved for alignment when the transmission unit 27 is configured. It can not be done. Therefore, in the conventional configuration (for example, the configuration in which the key and the key groove are provided), the positioning between the first fitting hole 28 position and the second fitting hole 31 position is performed using a large crane, a special tool or the like. There has been a possibility that work to configure the transmission unit 27 becomes complicated and work time is extended by performing some additional work or the like on the site.
In the present embodiment, when the assembling operation of the crusher 1 is performed, the first fitting hole is formed in a state in which the restricting portion 26 restricts relative slide movement between the output table 22 and the rotation support portion 15 of the crush table 4. In the case where there is a gap between the second fitting hole 31 and the second fitting hole 31 (ie, when the central axis C3 of the first fitting hole 28 and the central axis C4 of the second fitting hole 31 are separated) Even if any, as mentioned above, additional finishing work etc. should be performed on site by using eccentric crane 29 and / or eccentric bush 30 around each central axis, using a large crane or special tool etc. Instead, the transmission unit 27 can be configured easily.

  In addition, a plurality of (two in the present embodiment) transmission portions 27 are arranged at equal intervals concentrically around the rotation axis R1. As a result, when transmitting the rotational drive force to the crushing table 4, the load amount of the load is reduced in each transmission unit 27 to improve the reliability of each transmission unit 27, and the load is equally distributed in each transmission unit 27. It will be done. Therefore, the grinding table 4 can be stably rotated.

  In addition, the second fitting hole 31 formed in the crushing table 4 is a through hole penetrating in the vertical vertical direction. In the configuration in which the through hole is not formed, it is necessary to fit and adjust the eccentric pin 29 and the eccentric bush 30 by lifting the crushing table 4 or the like, but in the present embodiment, when configuring the transmission unit 27, from above The eccentric pin 29 and the eccentric bush 30 can be fitted in the first fitting hole 28 and the second fitting hole 31 so that the second fitting hole 31 is inserted. In addition, since the eccentric pin 29 and the eccentric bush 30 can be accessed from above, the eccentric pin 29 and the eccentric bush 30 can be rotated around their respective center axes from above. Thereby, the workability can be improved and the transmission unit 27 can be easily configured. In addition, since the eccentric pin 29 and the eccentric bush 30 can be easily accessed, the maintenance workability when removing and reattaching the eccentric pin 29 and the eccentric bush 30 when maintaining the crushing table 4 can be improved. It can be improved.

  The pulverizer 1 vibrates the pulverizing table 4 or the like of the table unit 16 when pulverizing the object to be pulverized. In the present embodiment, a pressing plate 32 is provided which closes the second fitting hole 31 from above. As a result, even if the crusher 1 vibrates and the eccentric bush 30 temporarily moves upward, the upper surface of the eccentric bush 30 interferes with the pressing plate 32, so that the eccentric bush 30 is moved from the second fitting hole 31. Can be prevented from coming out. Further, even if the crusher 1 vibrates and the eccentric pin 29 moves upward, the upper surface of the small diameter portion 36 interferes with the pressing plate 32, and the eccentric pin 29 moves upward from the second fitting hole 31. It is possible to prevent getting out.

  Further, a protrusion 37 is formed on the upper end of the eccentric pin 29. As a result, when rotating the eccentric pin 29 around the first central axis and the second central axis, the worker can easily and reliably rotate by gripping the projection 37. Therefore, the workability at the time of constituting transmission part 27 can be improved.

  In addition, a notch 40 is formed at the lower end of the eccentric bush 30. Thereby, when rotating the eccentric bush 30 around the third central axis and the fourth central axis, the worker engages a tool or the like in the notch 40 from the inner peripheral surface 30 b side of the eccentric bush 30, It can be rotated easily and reliably. Therefore, the workability at the time of constituting transmission part 27 can be improved. Further, even when removing the eccentric bush 30 from the second fitting hole 31 at the time of maintenance or the like, it is easily removed by engaging a tool or the like with the notch 40 from the inner peripheral surface 30 b side of the eccentric bush 30. be able to.

  Further, an engaging portion 38 is formed on the eccentric pin 29. As a result, when the operator engages a tool or the like with the engaging portion 38 at the time of maintenance or the like, the eccentric pin 29 can be easily and reliably removed from the first fitting hole 28. Also, a tool may be engaged with the engaging portion 38 and the eccentric pin 29 may be rotated by the tool.

  Further, a groove 39 is formed on the outer peripheral surface of the eccentric pin 29. Thereby, when fitting the first fitting portion 34 of the eccentric pin 29 to be fitted into the bottomed recessed first fitting hole 28 which is not penetrated into the first fitting hole 28, the first fitting The air in the fitting hole 28 passes through the groove 39 and is not discharged to the outside of the first fitting hole 28 so that the fitting of the eccentric pin 29 is not restrained. Therefore, since the first fitting portion 34 and the first fitting hole 28 can be easily fitted, the transmission portion 27 can be easily configured.

The present invention is not limited to the invention according to the above-described embodiment, and appropriate modifications can be made without departing from the scope of the invention.
For example, although the above-mentioned embodiment explained an example in which engaging part 38 was formed in projection part 37 of eccentric pin 29, this indication is not limited to this. The engaging portion may be formed on the eccentric pin 29 and may be formed not only on the projecting portion 37 but also on the projecting portion 37 and the small diameter portion 36, for example.

  Further, the number of transmission units 27 is not limited to two. The transmission unit 27 may be single or may be three or more (although it is preferable to have two or more than one). When a plurality of transmission units 27 are provided, the plurality of transmission units 27 may be arranged at equal intervals concentrically around the rotation axis R1 of the crushing table 4 and the output table 22, or based on the rotation axis R1. It is preferable to arrange at symmetrical positions, or arrange so as to satisfy either condition.

  Further, in the above embodiment, when the transmission portion 27 is configured, after the eccentric bush 30 is inserted into the second fitting hole 31, the eccentric pin 29 and the eccentric bush 30 are fitted, and thereafter the eccentric pin 29 is Although the example which makes the 1st fitting part 34 fit to the 1st fitting hole 28 was demonstrated, this indication is not limited to this. For example, after the first fitting portion 34 of the eccentric pin 29 is fitted into the first fitting hole 28, the eccentric pin 29 and the eccentric bush 30 may be fitted. In this case, the eccentric pin 29 is rotated around the first central axis C1 and the second central axis C2 in a state in which the first fitting portion 34 is fitted in the first fitting hole 28, and Adjust the position. By rotating the eccentric pin 29, the space between the second fitting portion 35 of the eccentric pin 29 and the second fitting hole 31 has the same shape as the cross section orthogonal to the axial direction of the eccentric bush 30. Then, in the same shape, the eccentric bush 30 is inserted into the space. When the eccentric bush 30 is inserted, the eccentric pin 29 and the eccentric bush 30 are fitted, and the eccentric bush 30 and the second fitting hole 31 are fitted. Thus, the transmission unit 27 is configured.

1 crusher 2 housing 3 air supply duct 4 crush table (crusher)
5 Grinding roller 6 Speed reducer (drive unit side member)
Reference Signs List 7 solid fuel supply pipe 8 rotary separator 9 outlet port 15 rotation support portion 15a support portion 15b cylindrical portion 15c flange portion 15d recess portion 16 table portion 21 gear portion 22 output table 22a protrusion portion 26 regulation portion 27 transmission portion 28 first fitting hole 29 Eccentric pin 30 Eccentric bush 31 Second fitting hole 32 Presser plate (closed portion)
34 first fitting portion 35 second fitting portion 36 small diameter portion 37 projecting portion 38 engaging portion 39 groove 40 notch (recessed portion or opening)

Claims (10)

A pulverizing unit that pulverizes an object to be crushed by rotating about a rotation axis extending vertically in the vertical direction;
A drive unit side member that is a drive unit side that rotationally drives the crushing unit;
And at least one transmission portion positioned at a predetermined distance in the radial direction from the rotation shaft and transmitting a rotational driving force from the drive portion side member to the crushing portion,
The transmission portion is formed in the same direction as a first fitting hole formed in the driving unit side member, a columnar first fitting portion fitting to the first fitting hole, and the first fitting portion. An eccentric pin integrally provided with an extending cylindrical second fitting portion, a cylindrical eccentric bush in which the second fitting portion is fitted, and the crushing portion formed in the crushing portion And a second fitting hole,
The eccentric pin is formed such that a first central axis which is a central axis of the first fitting portion and a second central axis which is a central axis of the second fitting portion are eccentric.
A crusher in which the eccentric bush is formed so that a third central axis which is a central axis of an outer diameter and a fourth central axis which is a central axis of an inner diameter extending in the same direction as the third central axis are eccentric. .   A restricting portion that restricts relative movement in a direction orthogonal to the central axis of the rotation axis in a horizontal plane between the driving portion side member and the crushing portion, is on the inner peripheral side of the transmission portion with respect to the central axis The crusher according to claim 1 provided. A plurality of the transmission units are provided,
The crusher according to claim 1 or 2, wherein the plurality of transmission parts are arranged at equal intervals concentrically around the rotation axis.   The crusher according to any one of claims 1 to 3, wherein the second fitting hole is a through hole penetrating in the vertical vertical direction.   The crusher according to claim 4, further comprising a closing portion closing the second fitting hole vertically from above.   The crusher according to claim 4 or 5, wherein a protrusion which protrudes vertically upward is formed at the upper end of the eccentric pin.   The crusher according to any one of claims 1 to 6, wherein a recess or an opening extending radially outward is formed on the inner circumferential surface of the eccentric bush.   The crusher according to any one of claims 1 to 7, wherein the eccentric pin is formed with an engagement portion engageable with a removal tool.   The groove which extends in the vertical up-down direction is formed in the outer peripheral surface of the eccentric pin over the outer peripheral surface of the first fitting portion and the second fitting portion. Crusher as described. A pulverizing unit that pulverizes an object to be crushed by rotating about a rotation axis extending vertically in the vertical direction;
A drive unit side member that is a drive unit side that rotationally drives the crushing unit;
A manufacturing method of a crusher comprising: at least one transmission portion which is located at a predetermined distance in the radial direction from the rotation shaft and which transmits rotational driving force from the driving portion side member to the crushing portion. ,
The transmission portion is formed in the same direction as a first fitting hole formed in the driving unit side member, a columnar first fitting portion fitting to the first fitting hole, and the first fitting portion. An eccentric pin integrally formed with an extending cylindrical second fitting portion, a cylindrical eccentric bush in which the second fitting portion is fitted, and the grinding member formed with the eccentric bush And a second fitting hole
The eccentric pin is formed such that a first central axis which is a central axis of the first fitting portion and a second central axis which is a central axis of the second fitting portion are eccentric.
The eccentric bush is formed so that the third central axis which is the central axis of the outer diameter and the fourth central axis which is the central axis of the inner diameter extending in the same direction as the third central axis are eccentric.
An eccentric bush inserting step for inserting the eccentric bush into the second fitting hole;
A second fitting portion inserting step of inserting the second fitting portion of the eccentric pin into the eccentric bush;
A rotation step of rotating the eccentric pin and the eccentric bush around any one of the first central axis, the second central axis, the third central axis and the fourth central axis;
A fitting step of fitting the first fitting portion of the eccentric pin to the first fitting hole by the rotation step.

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