Protector, crusher, outer part of protector, and method for maintaining protector

Abstract

To enable maintenance of a protector for fixing a striking plate to be performed at low costs in a crusher.SOLUTION: A protector is attached to a rotary plate which rotates in a crusher, supports a striking plate, and protects the rotary plate. The protector include a base part and an outer part. The outer part is disposed at the outer periphery side relative to the base part and detachably attached to the base part.SELECTED DRAWING: Figure 5

Description

[Technical Field]

[0001] The present disclosure relates to maintenance of a protector in a crusher. [Background technology]

[0002] Conventionally, impact crushers have been known in which an impact plate that rotates at high speed together with a rotor strikes rocks or other objects to be crushed fed into a supply port at the top of a casing, and crushes the objects by colliding them with a collision plate.

[0003] In such crushers, the tip of the striking plate (the part that protrudes from the rotor) wears with use, eventually reducing the crushing efficiency. Therefore, some crushers are known in which the striking plate is detachable from the rotor, so that when the striking plate becomes worn, it can be replaced with a new one. Another method is to make the striking plate symmetrical, so that after wear, the striking plate can be removed, turned over, and reattached to the rotor, thereby significantly extending the life of the striking plate.

[0004] The impact crusher of Patent Document 1 has a striking plate holder provided on the outer periphery of the rotor body. The striking plate holder has a symmetrical shape with two protrusions with a hole between them. A pair of protective members are attached to the outside of the striking plate holder to protect the striking plate and rotor. The striking plate is clamped between the pair of protective members. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Laid-Open No. 2007-83101 Summary of the Invention [Problem to be solved by the invention]

[0006] The protective member in Patent Document 1 also wears out like the striking plate and needs to be replaced. In a crusher that crushes a large amount of materials to be crushed, it is desired to reduce the cost required to replace the protective member.

[0007] The present disclosure has been made in view of the above circumstances, and an object thereof is to make it possible to inexpensively replace a protector for fixing a striking plate in a crusher. [Means for solving the problem]

[0008] The problem to be solved by the present disclosure is as described above. Next, the means for solving this problem and the effects thereof will be described.

[0009] According to a first aspect of the present disclosure, there is provided a protector having the following configuration. Specifically, this protector is attached to a rotating plate that rotates in a crusher, and supports a striking plate and protects the rotating plate. The protector includes a base portion and an outer portion. The outer portion is disposed on the outer peripheral side of the base portion and is detachable from the base portion. The outer portion slides relative to the base portion, thereby being attached to and detached from the base portion.

[0010] According to a second aspect of the present disclosure, there is provided an outer part of a protector having the following configuration. That is, the outer part is configured such that the outer part is spaced apart from the base part. By sliding the base portion, The outer part is detachably attached to the base part and constitutes a protector for the crusher. The protector is attached to a rotating plate that rotates in the crusher, and supports the striking plate and protects the rotating plate. When the protector is attached to the rotating plate, the outer part is positioned on the outer peripheral side of the base part.

[0011] As a result, even if the outer periphery of the protector becomes worn due to use of the crusher, maintenance can be completed simply by replacing the outer part, thereby achieving low-cost maintenance. This simplifies maintenance work for replacing the outer part.

[0012] According to a third aspect of the present disclosure, there is provided the following method for maintaining a protector. That is, this maintenance method is applied to a protector that is attached to a rotating plate that rotates in a crusher, supports a striking plate, and protects the rotating plate. The protector comprises a base part and an outer part. The outer part is disposed on the outer periphery side of the base part and is detachable from the base part. In this maintenance method, , and slidingly moving the base portion Remove the outer part. , and slidingly moving the base portion It is attached to the base part.

[0013] This allows for low-cost maintenance when the outer periphery of the protector is worn away by use of the crusher. This simplifies maintenance work for replacing the outer part. [Effects of the Invention]

[0014] According to the present disclosure, in a crusher, the protector for fixing the striking plate can be maintained at low cost. [Brief explanation of the drawings]

[0015] [Figure 1] 1 is a cross-sectional view schematically illustrating the overall configuration of a crusher according to an embodiment of the present disclosure. [Figure 2] FIG. 2 is a perspective view showing the overall configuration of the rotor and the striking plate. [Figure 3] FIG. 10 is a detailed perspective view of the striking plate attached to the rotor. [Figure 4] FIG. 4 is an exploded perspective view showing the configuration of a protector, a clamping member, and a striking plate. [Figure 5] 10 is a perspective view illustrating the operation of attaching the outer part to the base part of the protector. FIG. [Figure 6] FIG. 4 is a cross-sectional view schematically showing the shapes of the protrusions and grooves. [Figure 7] FIG. 10 is a cross-sectional view showing a first modified example of the shape of the protrusions and grooves. [Figure 8] FIG. 10 is a cross-sectional view showing a second modified example of the shape of the protrusions and grooves. DETAILED DESCRIPTION OF THE INVENTION

[0016] Next, the disclosed embodiments will be described with reference to the drawings. Fig. 1 is a cross-sectional view schematically showing the overall configuration of a crusher 100 according to one embodiment of the present disclosure. Fig. 1 shows a cross-section of the crusher 100 cut along a plane perpendicular to the axis of the rotor 2 (a rotation axis 2c described below). Fig. 2 is a perspective view showing the overall configuration of the rotor 2 and striking plate 1. Fig. 3 is a perspective view showing in detail the striking plate 1 attached to the rotor 2. Fig. 4 is an exploded perspective view showing the configuration of the protector 3, the fastening member 4, and the striking plate 1.

[0017] The crusher 100 shown in Fig. 1 is a machine that crushes raw material (object to be crushed) 70, such as rocks, by applying impacts and other forces. The crusher 100 mainly comprises a casing 90, a transmission shaft 21, a rotor 2, a striking plate 1, a collision plate 80, and a marlburn 81.

[0018] The casing 90 is hollow and houses the rotor 2, striking plate 1, collision plate 80, and Marlborne 81 inside. A transmission shaft 21 is horizontally disposed and rotatably supported so as to pass through the internal space of the casing 90. The transmission shaft 21 rotates when a driving force is transmitted from an electric motor or the like (not shown).

[0019] A supply port 91, which is an opening through which the raw material 70 is introduced from above, is formed in the center of the top surface of the casing 90. A discharge port 92, which is an opening through which the crushed material 71, which is the crushed raw material, is discharged, is formed in the bottom surface of the casing 90. A path for the raw material 70 is formed inside the casing 90, leading from the supply port 91 to the discharge port 92. The casing 90 is provided with a hinge mechanism, and is configured so that a portion of it can be opened for maintenance work, etc.

[0020] A pair of collision plates 80 are provided on either side of the space between the rotor 2 and the supply port 91 located directly above it. When the raw material 70 is blown off by the striking plate 1, it collides with the collision plate 80, which applies an impact force to the raw material 70, thereby crushing the raw material 70 more effectively.

[0021] The marl burners 81 are provided in pairs below the collision plate 80, sandwiching the rotor 2 between them. As the tip of the striking plate 1 rotating at high speed passes close to the marl burners 81, the raw material 70 is crushed into small pieces that can pass through the gap between the striking plate 1 and the marl burner 81. Note that instead of the marl burner 81, a collision plate separate from the collision plate 80 may be provided.

[0022] The rotor 2 is disposed approximately below the center of the internal space of the casing 90 and is fixed to the transmission shaft 21. Therefore, the rotor 2 can rotate integrally with the transmission shaft 21. As shown in FIG. 2, the rotation axis 2c of the rotor 2 coincides with the axis of the transmission shaft 21. In the following description, the axis about which the rotor 2 rotates may be simply referred to as the rotation axis 2c. Furthermore, in the following description, the direction of the rotation axis 2c may be referred to as the axial direction.

[0023] The shredder 100 of this embodiment is configured as a reversible rotation shredder, so that the raw material 70 can be crushed either by forward rotation, in which the rotor 2 rotates in the direction indicated by the arrow in Fig. 1, or by reverse rotation, in which the rotor 2 rotates in the opposite direction. The shredder 100 is configured to be symmetrical with respect to a vertical plane including the rotation axis 2c, so that equivalent crushing performance can be obtained regardless of the direction in which the rotor 2 is rotated. For this reason, the supply port 91 is located directly above the rotation axis 2c.

[0024] 3, the rotor 2 includes four rotary discs 22. However, the number of rotary discs 22 may be one to three, or may be five or more.

[0025] The four rotary discs 22 are arranged at intervals in the axial direction and attached to the transmission shaft 21. The rotary discs 22 rotate integrally with the transmission shaft 21. Therefore, the axis serving as the center of rotation of the rotary discs 22 coincides with the rotation axis 2c.

[0026] As shown in Figure 2, an accommodating recess 23 capable of accommodating a portion of the striking plate 1 is formed on the outer periphery of each rotating disc 22. A plurality of accommodating recesses 23 (four in this embodiment) are formed at equal intervals around the circumference of the rotating disc 22. The four accommodating recesses 23 have the same shape.

[0027] 2, the four rotary discs 22 have substantially the same shape and are fixed to the transmission shaft 21 with their phases aligned with one another. Therefore, the accommodating recesses 23 of the rotary discs 22 are aligned in a straight line in a direction parallel to the rotation shaft 2c.

[0028] The rotating disk 22 includes a rotating plate 24 , a rotor liner 25 , and a protector 3 .

[0029] The rotary plate 24 is formed in a plate shape and is fixed to the transmission shaft 21. The above-mentioned accommodating recess 23 is configured by forming a recess in this rotary plate 24.

[0030] A pair of rotor liners 25 are arranged on either side of each of the accommodating recesses 23 formed in the rotating plate 24. Each rotor liner 25 is arranged to cover the outer circumferential surface of the rotating plate 24 and is fixed to the rotating plate 24 by a fixing member such as a bolt. This protects the rotating plate 24 from wear. The rotor liner 25 also has claws 26 for hooking the protector 3, thereby fixing the protector 3 to the rotating plate 24. The detailed configuration of the rotor liner 25 will be described later.

[0031] The protectors 3 are arranged in pairs in the respective accommodating recesses 23 formed in the rotary plate 24 so as to face each other.

[0032] 4, the protector 3 is formed with an inclined tapered guide surface 31, and a first protrusion 33 and a second protrusion 34 formed on both ends of the tapered guide surface 31. In the following description, the reference numerals 3a and 3b may be used to distinguish between the pair of protectors 3. Furthermore, the reference numerals 31a and 31b may be used to distinguish between the tapered guide surfaces 31 formed on the protectors 3a and 3b.

[0033] In each of the protectors 3a, 3b, an insertion recess 35 and a fixing recess 36 are formed on the side opposite the tapered guide surfaces 31a, 31b. A protrusion formed on the rotating plate 24 can be inserted into the insertion recess 35. A claw portion 26 formed on the rotor liner 25 can be hooked into the fixing recess 36. This allows the protectors 3a, 3b to be fixed to the rotating plate 24 by the rotor liner 25.

[0034] When the protectors 3a and 3b are disposed in the accommodating recess 23 so as to face each other, the tapered guide surfaces 31a and 31b formed on the protectors 3a and 3b, respectively, are positioned so as to face each other as shown in Fig. 4. The two tapered guide surfaces 31a and 31b are formed so as to be inclined so as to move away from each other as they approach the rotation shaft 2c. In other words, the two tapered guide surfaces 31a and 31b are inclined symmetrically and have a tapered shape when viewed in a direction parallel to the rotation shaft 2c.

[0035] Tapered surfaces 41a and 41b of the fastening members 4a and 4b (described later) are arranged so as to be in contact with or face, with a gap, the tapered guide surfaces 31a and 31b of the protectors 3a and 3b. The tapered surfaces 41a and 41b of the fastening members 4a and 4b have shapes corresponding to the tapered guide surfaces 31a and 31b of the protectors 3a and 3b.

[0036] Since the tapered guide surfaces 31a, 31b are arranged at an incline as described above, the tapered guide surfaces 31a, 31b guide the pair of fastening members 4a, 4b so that the distance between the pair of fastening members 4a, 4b becomes smaller as the positions of the fastening members 4a, 4b move away from the rotation axis 2c.

[0037] The first projection 33 is provided at the end of the tapered guide surface 31 located on the side farther from the axis of the rotor 2, so as to project in a direction approaching the protector 3 on the opposite side.

[0038] The second projection 34 is provided at the end of the tapered guide surface 31 that is located on the side closer to the shaft of the rotor 2, and projects in a direction approaching the protector 3 on the opposite side.

[0039] As shown in Fig. 1, the crusher 100 of this embodiment includes a pair of clamping members (fixing members) 4 that are provided facing each other with a striking plate 1 in between. In the following description, the reference numerals 4a and 4b may be used to distinguish between the pair of clamping members 4, as shown in Fig. 4. Furthermore, the reference numerals 41a and 41b may be used to distinguish between the tapered surfaces 41 formed on the respective clamping members 4a and 4b.

[0040] The fastening member 4 is formed in a block shape and is disposed between the protector 3 and the striking plate 1 housed in the housing recess 23 .

[0041] The fastening member 4 is formed with a tapered surface 41 and a groove 42. The groove 42 is disposed on the side of the fastening member 4 opposite to the side on which the tapered surface 41 is formed.

[0042] The tapered surfaces 41a, 41b formed on the fastening members 4a, 4b are formed to be inclined surfaces corresponding to the shapes of the tapered guide surfaces 31a, 31b, as shown in Fig. 4. The tapered surfaces 41a, 41b are formed to be inclined so as to move away from each other as they approach the rotation shaft 2c.

[0043] The fastening member 4 is provided so as to be slidable along the tapered guide surface 31 of the protector 3 in a direction toward or away from the rotary shaft 2c.

[0044] In this way, the contact surfaces between the protectors 3a, 3b and the clamping members 4a, 4b are tapered, gradually narrowing as they move away from the rotary shaft 2c. As a result, when the clamping members 4a, 4b move in a direction away from the rotary shaft 2c while sandwiching the striking plate 1, the clamping members 4a, 4b can clamp and fix the striking plate 1 by tapered engagement.

[0045] The groove 42 is formed as a groove extending in a direction parallel to the rotation shaft 2c. A part of the striking plate 1 fits into this groove 42, so that the clamping member 4 does not move relative to the striking plate 1 in a direction perpendicular to the groove. In other words, when the clamping member 4 holds the striking plate 1, the clamping member 4 moves in conjunction with the movement of the striking plate 1 in the direction toward or away from the rotation shaft 2c.

[0046] As described above, the protector 3 and the fastening member 4 are simply arranged so that their tapered surfaces can come into contact with each other, making them easy to attach and detach. This also simplifies maintenance work such as part replacement.

[0047] The tapered guide surface 31 is not formed on the rotating plate 24, but on the protector 3 that is detachably attached to the rotating plate 24. Therefore, even if the tapered guide surface 31 wears out due to long-term use, repair work such as welding is not required, and the repair can be completed simply by replacing the protector 3. As a result, the workload can be reduced and distortion of the rotating plate 24 due to heat generated when welding is performed can be prevented.

[0048] The protector 3 includes a base portion 3p and an outer portion 3q. The base portion 3p is disposed on the side of the accommodating recess 23 closer to the rotating shaft 2c. The outer portion 3q is disposed on the outer peripheral side of the base portion 3p. The base portion 3p is provided with a tapered guide surface 31, a second protrusion 34, an insertion recess 35, and a fixing recess 36. The outer portion 3q is provided with a first protrusion 33.

[0049] The base portion 3p and the outer portion 3q are separate components that are connected to each other to form the protector 3. It is preferable that the outer portion 3q covers the entire outer peripheral surface of the base portion 3p.

[0050] The outer periphery of the protector 3 frequently collides with the raw material 70 and the like, and therefore wears out quickly. In this embodiment, only the outer part 3q can be replaced, rather than the entire protector 3, thereby reducing replacement costs. Furthermore, the outer part 3q is significantly lighter than the entire protector 3, which significantly reduces the workload during maintenance.

[0051] As shown in Figure 5, a protrusion 37 with a T-shaped cross section is formed on the outer peripheral surface of the base portion 3p so as to protrude toward the outer peripheral side of the rotor 2. Correspondingly, a groove 38 with a T-shaped cross section is formed on the inner peripheral surface of the outer portion 3q so as to open the inner peripheral side of the rotor 2. The base portion 3p and the outer portion 3q can be connected to each other by engaging the groove 38 with the protrusion 37. The direction in which the outer portion 3q is attached to the base portion 3p is indicated by an arrow in Figure 5. This attachment direction is the tangential direction of the rotation of the rotor 2, that is, the direction approaching the tapered guide surface 31a (in other words, the striking plate 1, which is the support target of the protector 3).

[0052] A cross section of the projection 37 and groove 38 taken along a plane perpendicular to the insertion direction is T-shaped. Therefore, when the groove 38 is engaged with the projection 37, the outer part 3q can be mechanically prevented from separating radially outward from the base part 3p. Therefore, the outer part 3q, which is subjected to centrifugal force, can be firmly connected to the base part 3p.

[0053] In the insertion direction, the groove 38 is formed so as to open only one side, thereby preventing the projection 37 from being exposed to the outer periphery of the rotor 2.

[0054] As shown in Fig. 5, a pair of fixing recesses 36 are provided on both ends of the base portion 3p in the direction of the rotation axis 2c. Each fixing recess 36 is open on the outer periphery side of the rotor 2. Correspondingly, a pair of claw portions 26 are provided on the rotor liner 25 in the direction of the rotation axis 2c. The claw portions 26 protrude toward the inner periphery side of the rotor 2. Each of the two claw portions 26 can be hooked into the fixing recess 36.

[0055] The outer part 3q is formed with restricting protrusions (restricting portions) 39. A pair of restricting protrusions 39 is provided on both ends of the outer part 3q in the direction of the rotation axis 2c. When the outer part 3q is attached to the base part 3p and the claw portions 26 are inserted into the fixing recesses 36, the restricting protrusions 39 come into contact with the claw portions 26, preventing the outer part 3q from moving in a direction away from the base part 3p. In this way, the claw portions 26 of the rotor liner 25 have the function of fixing the protector 3 to the rotating plate 24, as well as the function of preventing the outer part 3q from coming off. Therefore, with a simple configuration, the outer part 3q can be fixed to the base part 3p without using bolts.

[0056] Next, the configuration of the striking plate 1 used in the crusher 100 of this embodiment will be described with reference to FIGS.

[0057] As shown in FIG. 1, the striking plates 1 are attached to the outer periphery of the rotor 2 at equal intervals in the circumferential direction, radially outward from the rotation axis 2c.

[0058] As shown in FIG. 3 and other figures, the striking plate 1 is formed in the shape of a plate (specifically, a rectangular plate) that has a certain thickness and has two opposing sides. The rectangular shape of the striking plate 1 has two sets of opposing sides, and striking portions 10a, 10b are formed on the two sides that belong to one of these sets. In the following explanation, the direction along the sides on which the striking portions 10a, 10b are arranged is sometimes referred to as the width direction of the striking plate 1. Furthermore, the direction perpendicular to both the thickness direction and the width direction (in other words, the direction in which the striking portions 10a, 10b face each other) is sometimes referred to as the height direction. However, these designations of directions do not limit the orientation of the striking plate 1.

[0059] The striking portions 10a, 10b are arranged to face each other in the height direction. The striking plate 1 is oriented so that its height direction coincides with the radial direction of the rotor 2 and its thickness direction coincides with the circumferential direction of the rotor 2, and is attached to the rotor 2 with one end in the height direction protruding from the outer periphery of the rotor 2. As a result, the width direction is oriented in a direction parallel to the rotation axis 2c of the rotor 2. The striking plate 1 has a dimension in the width direction that allows it to straddle two rotary discs 22.

[0060] When a new striking plate 1 is attached to the rotor 2, either of the two striking parts 10a or 10b is selected to be used for crushing. The striking plate 1 is then attached to the rotor 2 so that the striking part 10a on the selected side protrudes outward from the rotary disc 22, while the striking part 10b on the opposite side is inserted into the receiving recess 23 of the rotary disc 22.

[0061] As shown in Fig. 3, the striking plate 1 has a hook portion 11. As shown in Fig. 4, the hook portions 11 are formed so as to correspond to each other on both sides in the thickness direction of the striking plate 1. The hook portions 11 are formed so as to be convex in the thickness direction.

[0062] 3, the hook portion 11 is located between the two striking portions 10a, 10b and in the center in the height direction of the striking plate 1. Two hook portions 11 (i.e., the number of rotating discs 22 to which the striking plate 1 is fixed) are formed on each surface in the thickness direction of the striking plate 1. Each hook portion 11 has two protrusions 11a, 11b extending in the width direction of the striking plate 1.

[0063] When viewed in the thickness direction of the striking plate 1, the convex portions 11a and 11b are formed symmetrically with respect to a line that bisects the height of the striking plate 1, as shown in Figure 3. In the following explanation, this axis may be referred to as the axis of symmetry 1a. The axis of symmetry 1a is oriented parallel to the width direction of the striking plate 1. The longitudinal direction of the convex portions 11a and 11b is parallel to the axis of symmetry 1a.

[0064] Both of the protrusions 11a and 11b can be fitted into the groove 42 of the fastening member 4. By sliding the fastening member 4 in a direction parallel to the symmetry axis 1a (rotation axis 2c), the fastening member 4 can be switched between a state in which it engages with the hook portion 11 and a state in which it disengages from the engagement.

[0065] When the fastening members 4 arranged on both sides of the striking plate 1 in the thickness direction are engaged with the hook portions 11 (the convex portions 11b in Figure 3), and the striking plate 1 and the fastening members 4a, 4b move away from the rotating shaft 2c due to centrifugal force, a tapered engagement occurs between the protectors 3a, 3b and the fastening members 4a, 4b, and the striking plate 1 is fixed to the rotor 2.

[0066] In this way, the striking plate 1 can be easily fixed to the rotary plate 24 with a simple structure, which simplifies the work.

[0067] When attaching the striking plate 1 to the rotary plate 24, the groove 42 of the fastening member 4 is attached to the protruding portion 11a, 11b (first and second protruding portions) that is closer to the rotary shaft 2c, as shown in FIG. 4. The attached striking plate 1 moves radially outward due to centrifugal force when the rotor 2 is rotated. Even after this movement, the outer peripheral surface of the outer portion 3q is still positioned on the outer peripheral side of the protruding portion 11a, 11b that is farther from the rotary shaft 2c, as shown in FIG. 3. Because the protruding portion farther from the rotary shaft 2c is effectively protected from wear by the outer portion 3q, the groove 42 of the fastening member 4 can be smoothly attached to the protruding portion after the striking plate 1 is turned over and attached to the rotary plate 24.

[0068] As described above, in the crusher 100, the protector 3 is attached to the rotating rotary plate 24. The protector 3 supports the striking plate 1 and protects the rotary plate 24. The protector 3 includes a base portion 3p and an outer portion 3q. The outer portion 3q is disposed on the outer peripheral side of the base portion 3p. The outer portion 3q is detachable from the base portion 3p.

[0069] As a result, even if the outer periphery of the protector 3 is worn, maintenance can be completed by replacing the outer portion 3q, which is one of the components, thereby reducing maintenance costs.

[0070] In the protector 3 of this embodiment, the outer part 3q slides relative to the base part 3p, thereby allowing the protector 3 to be attached to and detached from the base part 3p.

[0071] This simplifies the maintenance work for replacing the outer part 3q.

[0072] In the protector 3 of this embodiment, a linearly extending groove 38 is formed in the outer portion 3q. The outer portion 3q is configured to be slidable along the groove 38 relative to the base portion 3p.

[0073] This allows the outer part 3q to be attached to and detached from the base part 3p with a simple configuration.

[0074] In the protector 3 of this embodiment, the outer portion 3q is fixed to the base portion 3p without using a bolt.

[0075] This eliminates the need to install and remove bolts, improving maintainability.

[0076] In the protector 3 of this embodiment, the outer part 3q is provided with a restricting protrusion 39. The restricting protrusion 39 prevents the outer part 3q from moving in a direction away from the base part 3p by hitting the rotor liner 25, which is a part of the crusher 100.

[0077] This allows the outer portion 3q to be substantially fixed to the base portion 3p with a small number of parts.

[0078] In the protector 3 of this embodiment, the restricting projection 39 comes into contact with the rotor liner 25 fixed to the rotary plate 24, thereby preventing the outer portion 3q from moving in a direction away from the base portion 3p.

[0079] This allows for a simple configuration.

[0080] The protector 3 of this embodiment is formed with a tapered guide surface 31 that guides the fastening member 4 attached to the striking plate 1. The tapered guide surface 31 is formed so that the fastening member 4 fastens the striking plate 1 as the striking plate 1 moves toward the outer periphery.

[0081] This allows the striking plate 1 to be fixed by taper fastening while keeping maintenance costs low.

[0082] The crusher 100 of this embodiment includes a protector 3, a rotating plate 24, and a striking plate 1.

[0083] This makes it possible to provide the crusher 100 in which the protector 3 can be maintained at low cost.

[0084] In the protector 3 of this embodiment, two protrusions 11a and 11b are formed on the striking plate 1. When the striking plate 1 is attached to the protector 3 using the protrusion 11b as shown in Figure 3, the protrusion 11a is located closer to the inner periphery than the outer periphery of the outer part 3q. By removing the striking plate 1 from the state shown in Figure 3 and reversing the orientation of the striking plate 1, the striking plate 1 can be attached to the protector 3 using the protrusion 11a.

[0085] This prevents the protrusion 11a from being worn down even if the outer peripheral surface of the outer part 3q is slightly worn down while the striking plate 1 is attached to the protector 3 using the protrusion 11b. Therefore, when the striking plate 1 is turned over, the striking plate 1 can be attached to the protector 3 well using the protrusion 11a.

[0086] Although the preferred embodiment of the present disclosure has been described above, the above configuration can be modified, for example, as follows. A single modification may be made, or multiple modifications may be made in any combination.

[0087] The base portion 3p and the outer portion 3q may be mechanically coupled to each other in any configuration, for example, the protrusion 37 may be formed on the outer portion 3q side, and the groove 38 may be formed on the base portion 3p side.

[0088] Instead of forming the protrusion 37 and the groove 38 in a T-shaped cross section as shown in Figures 5 and 6, for example, a protrusion 37x and a groove 38x may be formed in a tapered cross section as shown in Figure 7. Also, for example, a pair of protrusions 37y and grooves 38y may be formed in an L-shaped cross section as shown in Figure 8.

[0089] Instead of the boltless fixing as described above, the outer portion 3q may be fixed to the base portion 3p using a known bolt.

[0090] The outer portion 3q may be prevented from coming off by the restricting protrusion 39 coming into contact with a component other than the rotor liner 25. The restricting protrusion 39 may be omitted.

[0091] The shapes of the insertion recess 35, the fixing recess 36, the restricting protrusion 39, and the claw portion 26 can be changed as appropriate.

[0092] It is also possible to change the configuration so that the striking plate 1 is directly fixed to the protector 3 having a divided structure consisting of a base portion 3p and an outer portion 3q without using the fastening member 4.

[0093] Three or less or five or more striking plates 1 may be attached to the rotor 2 at equal intervals in the circumferential direction.

[0094] The first protrusions 33 may be omitted. [Explanation of symbols]

[0095] 1 striking board 3 Protector 3p base part 3q outer part 4 Fastening member 11a, 11b convex part 24 Rotating Plate 25 Rotor liner (parts) 31 Tapered guideway 37 Protrusion 38 Groove 39 Restriction protrusion (restriction part) 100 Crusher

Claims

1. A protector attached to a rotating plate that rotates in a crusher, supporting a striking plate and protecting the rotating plate, A base portion; an outer portion disposed on an outer circumferential side of the base portion and detachable from the base portion; Equipped with The protector is characterized in that the outer part is attached to and detached from the base part by sliding relative to the base part.

2. 2. The protector according to claim 1, A linearly extending groove is formed in the outer portion or the base portion, The protector is characterized in that the outer portion is configured to be slidable relative to the base portion along the groove.

3. The protector according to claim 1 or 2, The protector is characterized in that the outer portion is fixed to the base portion without a bolt.

4. The protector according to any one of claims 1 to 3, The outer portion is provided with a restricting portion, The protector is characterized in that the restricting portion prevents the outer portion from moving in a direction away from the base portion by contacting a component of the crusher.

5. 5. The protector according to claim 4, The protector is characterized in that the restricting portion prevents the outer portion from moving in a direction away from the base portion by coming into contact with a rotor liner fixed to the rotating plate.

6. The protector according to any one of claims 1 to 5, A tapered guide surface is formed to guide the clamping member attached to the striking plate, The tapered guide surface is formed so that the fastening member fastens the striking plate as the striking plate moves toward the outer periphery.

7. A protector according to any one of claims 1 to 6; The rotating plate; The striking plate; A crusher comprising:

8. The crusher according to claim 7, The striking plate is formed with a first protrusion and a second protrusion, When the striking plate is attached to the protector using the first protrusion, the second protrusion is located on the inner peripheral side of the outer peripheral surface of the outer part, The crusher according to claim 1, wherein the striking plate can be attached to the protector by using the second protrusions by reversing the orientation of the striking plate.

9. It is configured to be detachable by sliding relative to the base portion, A protector for the crusher is formed together with the base portion, the protector is attached to a rotating plate that rotates in the crusher, and supports the striking plate and protects the rotating plate; The outer portion of the protector is disposed on the outer circumferential side of the base portion when the protector is attached to the rotary plate.

10. A maintenance method for a protector that is attached to a rotating plate that rotates in a crusher, supports a striking plate, and protects the rotating plate, comprising: The protector includes a base portion and an outer portion that is disposed on the outer peripheral side of the base portion and is detachable from the base portion, The outer part is removed from the base part by sliding it relative to the base part; A method for maintaining a protector, comprising the steps of: attaching an outer part, which is separate from the outer part, to the base part by sliding the outer part relative to the base part.

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