JP2011088092A - Crusher - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a crusher in which damage to a primary structure of crushing device is suppressed, the damage occurring when a foreign matter is bitten in between an anvil and a crushing bit. <P>SOLUTION: The crusher includes: a feeding conveyor 12 that supplies articles to be crushed; a crushing rotor 15 that is arranged opposite to an end part on the downstream side of the feeding conveyor 12; an anvil 34 that is installed in a crushing chamber 27 in which the crushing rotor 15 is housed; and a screen 38 that has a plurality of discharge holes and that is arranged opposite to the outer periphery of the crushing rotor 15. The crushing rotor 15 is equipped with a rotary shaft part 101 that is freely rotatably installed in a crusher frame 20, a drum part 102 that is installed concentrically with the rotary shaft part 101 and that is rotatable relative to the rotary shaft part 101, and a connecting member 103 that connects the drum part 102 to the rotary shaft part 101 and that releases the connection between the drum part 102 and the rotary shaft part 101 when an impact load in excess of a set value is imparted to the crushing rotor 15. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a crusher for crushing various objects to be crushed, such as thinned wood, waste wood, construction waste, etc., mainly for the reuse and volume reduction of waste.

  As a kind of crusher, a crushing rotor with a plurality of crushing bits provided on the outer peripheral surface is rotated at high speed in the crushing chamber, and the object to be crushed is struck by impact with a crushing bit or an anvil (fixed blade) provided in the crushing chamber. There is what is crushed (see, for example, Patent Document 1).

JP 2005-319349 A

  The crushing rotor of a crusher to which the present invention is applied hits and crushes the object to be crushed using the moment of inertia of the crushing rotor itself in addition to the rotational power given from the power source. In the case of wood-based crushed objects that are mainly assumed to be crushed, the crushing operation proceeds while the crushing rotor absorbs the energy of the crushed rotor appropriately, so there is usually a force applied between the anvil and the crushing bit. It does not increase rapidly. However, if a foreign object that is difficult to crush, such as an iron block mixed in the material to be crushed, is caught between the anvil and the crushing bit, the inertial force of the crushing rotor momentarily acts on the anvil and the crushing bit, and both are excessive. Impact force will be applied.

  Therefore, the crusher of Patent Document 1 is configured to hold a rotatable anvil frame that supports the anvil with a shear pin (shear pin). With this configuration, when an excessive impact force is momentarily applied to the anvil and the crushing bit due to foreign matter mixed in the material to be crushed between the anvil and the crushing bit, the shear pin is cut. Thus, the anvil frame rotates and the crushing chamber is opened to help discharge foreign matter.

  However, the peripheral speed of the crushing rotor during the crushing operation is very large, and the anvil housing also has a corresponding moment of inertia. Therefore, even the impact force at the moment when a foreign object is caught between the crushing bit and the anvil alone may cause damage to the main structure of the crushing device, such as the crushing rotor and the anvil housing.

  The present invention has been made in view of the above circumstances, and an object thereof is to provide a crusher capable of suppressing damage to a main structure of a crushing device when a foreign object is caught between an anvil and a crushing bit. To do.

  In order to achieve the above object, the first invention provides a feeder for supplying a material to be crushed, a crushing rotor disposed opposite to a downstream end of the feeder in the direction of conveying the material to be crushed, and the crushing rotor. A crusher provided with an anvil provided so as to collide with a crushing piece that circulates in the crushing chamber, and a screen that has a plurality of discharge holes and is arranged to face the outer peripheral surface of the crushing rotor. In the machine, the crushing rotor is provided on the crusher frame so as to be rotatable about the rotating shaft portion, and is provided on the outer peripheral portion of the rotating shaft portion so as to be concentric with the rotating shaft portion, and is rotatable relative to the rotating shaft portion. And a connecting member for connecting the drum portion to the rotating shaft portion and for releasing the connection between the drum portion and the rotating shaft portion when an impact load exceeding a set value is applied to the crushing rotor. To have And butterflies.

  A second invention is characterized in that, in the first invention, the connecting member is a shear pin that breaks preferentially over other components when an impact load exceeding an allowable shear stress is applied.

  According to a third invention, in the first or second invention, the anvil frame that supports the anvil and is provided so as to be rotatable with respect to the crusher frame; It is further characterized by further comprising a rotation permission means for allowing the anvil frame to rotate when an impact force exceeding an allowable value is applied to the anvil and opening the crushing chamber.

  According to a fourth aspect, in the third aspect, the connecting member releases the connection between the drum portion and the rotating shaft portion with an impact force that is about the same as or smaller than an allowable value of the rotation allowing means. Features.

  ADVANTAGE OF THE INVENTION According to this invention, the damage of the main structure of the crushing apparatus at the time of a foreign material biting between an anvil and a crushing bit can be suppressed.

It is a side view showing the whole crusher structure concerning one embodiment of the present invention. It is a top view showing the whole crusher structure concerning one embodiment of the present invention. It is a see-through | perspective side view which shows the principal part structure of the crushing function structure part of the crusher which concerns on one Embodiment of this invention. It is a side view of the crushing rotor with which the crusher which concerns on one Embodiment of this invention was equipped. It is arrow sectional drawing by the VV line | wire in FIG.

  Embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1 is a side view showing the overall structure of a crusher according to an embodiment of the present invention, and FIG. 2 is a plan view thereof. In the following, the direction corresponding to the right and left in FIG.

  The crusher illustrated in FIG. 1 and FIG. 2 is crushed by a traveling body 1 for self-running, a crushing function constituent unit 2 that crushes an object to be crushed provided on the traveling body 1, and a crushing function constituent unit 2. A discharge conveyor 3 for conveying the crushed material and discharging it out of the machine, and a power unit (power unit) 4 equipped with an engine or the like as a power source for each of the mounted devices. In addition, examples of crushed objects to be crushed by the crusher of the present embodiment include pruned branch materials and thinned timber generated in forests, wood such as waste timber generated by the dismantling of buildings, and waste plastics. Wood, waste tatami, bamboo, etc. are included. The wood is not limited to relatively dry and hard wood, but also includes soft wood with a large amount of water such as roadside branches and roadside weeds that have just been pruned. In the present embodiment, these objects to be crushed are collectively referred to as objects to be crushed.

  The traveling body 1 includes a track frame 5, driving wheels 6 and driven wheels 7 provided at both front and rear ends of the track frame 5, a driving device (traveling hydraulic motor) 8 having an output shaft connected to the shaft of the driving wheel 6, and driving A crawler belt (endless track crawler belt) 9 is provided around the wheel 6 and the driven wheel 7. A main body frame 10 is provided on the track frame 5, and the main body frame 10 supports the crushing function component 2, the discharge conveyor 3, the power unit 4, and the like.

  The crushing function component 2 is introduced by a hopper 11 that receives an object to be crushed, a feed conveyor 12 (see FIG. 2) as a means for conveying the object to be crushed accommodated in the hopper 11, and a feed conveyor 12. The crushing device 13 for crushing the crushed material (see FIG. 3), and the crushing device that presses the crushed material before the crushing device 13 and introduces the crushed material introduced into the crushing device 13 in cooperation with the feed conveyor 12 13 is provided with a pressing feeder device 14 (see FIG. 3). The configuration of the crusher delivery component 2 will be described later.

  The discharge conveyor 3 discharges the crushed material discharged from the crushing device 13 to the outside of the machine, and is wound between a conveyor frame 50 provided with driving wheels and driven wheels (not shown) at both front and rear ends, between the driving wheels and the driven wheels. It has a conveyor cover 51 attached to the conveyor frame 50 so as to cover the upper side of the conveying surface of the rotated conveyor belt (not shown), a driving device (hydraulic motor for discharge conveyor) 52 that rotates the drive wheels, and the like. The downstream (front side) portion of the discharge conveyor 3 is supported by suspension by a support member 53 provided so as to protrude from the support portion of the power unit 4, and the upstream (rear side) end portion is interposed via the support member 54. The main body frame 10 is suspended and supported. The discharge conveyor 3 extends substantially horizontally from the lower side of the crushing device 13 between the left and right crawler belts 9 and is inclined upward from the lower side of the power unit 4 to the front side. However, a straight first conveyor that extends forward from below the crushing device 13 in the lower region of the main body frame 10 and forward from below the discharge end of the first conveyor without using the bent conveyor in this way. In some cases, a straight-type second conveyor that is inclined upward is formed as a transit type discharge conveyor.

  The power unit 4 is mounted on the front portion of the main body frame 10 via a support member 55. A driver's seat 56 is provided in a compartment on the rear side of the power unit 4 and on one side in the body width direction (lower side in FIG. 2). The driver's seat 56 is provided with an operation lever 57 for operating the crusher. Below the driver's seat 56 is provided an operation panel 58 for performing other operations, settings, monitoring, and the like. . In this example, the operation panel 58 is provided on the side of the machine body so that the operator can easily operate from the ground, but may be provided in the driver's seat 56.

  FIG. 3 is a perspective side view showing a main part structure of the crushing function component 2.

  As shown in FIG. 3, the feed conveyor 12 functions as a feeder together with the pressure feeder device 14 to convey and supply the object to be crushed toward the crushing rotor 15. The feed conveyor 12 includes a sprocket-like drive wheel 16 disposed facing the rear side of the crushing rotor 15, a driven wheel (not shown) provided on the opposite side (near the rear end of the machine body), and these drive wheels 16. And a conveyor belt (chain belt) 17 (see FIG. 2) wound between the driven wheels and provided in a plurality of rows (four rows in this example) in the width direction, and the crushing rotor is accommodated in the hopper 11. 15 extends substantially horizontally rearward from a front end portion (downstream end portion in the conveyance direction of the object to be crushed) facing the front side 15. The driven wheel is supported by a bearing 19 (see FIG. 1) provided at the rear portion of the side wall body 18 (see FIG. 1) of the hopper 11, and the driving wheel 16 is a bearing provided on the crusher frame 20 constituting the side wall of the crushing device 13. (Not shown). The rotating shaft 21 of the driving wheel 16 of the feed conveyor 12 is connected to an output shaft of a driving device (not shown) provided outside the bearing in the body width direction via a coupling or the like. By rotating the driving device (not shown), the conveyor belt 17 is circulated between the driving wheel 16 and the driven wheel, and the object to be crushed is supplied to the crushing device 13.

  The pressing feeder device 14 includes a rotation shaft 22 extending in the body width direction above the crushing rotor 15, a support member 23 supported so as to be swingable in the vertical direction about the rotation shaft 22, and a support member 23. And a pressure roller 24 that is opposed to the conveying surface of the feed conveyor 12 on the rear side of the crushing rotor 15, and a hydraulic cylinder 29 that rotates the pressure roller 24.

  The rotating shaft 22 is rotatably supported by a bearing (not shown) provided on the crusher frame 20.

  The support member 23 includes an arm portion 25 that rotates about a rotation shaft 22 and a bracket portion 26 that is attached to the distal end side of the arm portion 25 and that is attached to a press roller. The lower surface of the arm portion 25 is curved in a substantially arc shape, and a curved plate 28 is attached to the lower portion of the curved portion.

  The presser roller 24 corresponds to the width of the transport surface of the feed conveyor 12 in the width direction (the direction orthogonal to the paper surface in FIG. 3), and is set equal to or slightly larger than the transport surface of the feed conveyor 12. Yes. The presser roller 24 rides on the object to be crushed on the feed conveyor 12 and presses the object to be crushed by its own weight, and corresponds to the conveying speed of the feed conveyor 12 by a driving device (not shown) built in the body part. The object to be crushed is supplied to a crushing chamber 27 (described later) in cooperation with the feed conveyor 12 by rotating at a peripheral speed.

  The hydraulic cylinder 29 forcibly moves the pressing feeder device 14 up and down during maintenance or the like, and a bracket 30 fixed to the crusher frame 20 via a beam provided at an upper position near the front end portion of the arm portion 25. Further, the bottom side end portion is connected to the bracket 32 provided at the rear end portion of the upper surface of the arm portion 25 so as to be rotatable.

  The crushing device 13 is located on a substantially central portion in the longitudinal direction of the main body frame 10 (see FIG. 1), and in the crushing chamber 27 and the crushing rotor 15 rotating at high speed in the crushing chamber 27 as shown in FIG. An anvil (repulsion plate) 34 provided outside in the radial direction of the crushing rotor 15 is provided. The crushing rotor 15 that is a driving body and the anvil 34 that is a stationary body each function as crushing means.

  4 is a side view of the crushing rotor 15, and FIG. 5 is a cross-sectional view taken along line VV in FIG. In FIG. 5, the crushing bit 36 is not shown.

  The crushing rotor 15 includes a rotating shaft portion 101 provided rotatably on the crusher frame 20, a drum portion 102 provided concentrically with the rotating shaft portion 101 on the outer peripheral portion of the rotating shaft portion 101, and the drum portion 102. And a connecting member 103 that connects the rotating shaft portion 101 to the rotating shaft portion 101.

  The rotating shaft 101 extends substantially horizontally in the left-right direction, and both left and right ends extend to the outside of the crusher frame 20 and are rotatably supported by the left and right crusher frames 20 via bearings 104, respectively. Yes. The rotating shaft 101 may be a hollow shaft or a solid shaft. The bearing 104 is fixed to the outer wall surface of the crusher frame 20 by a support member 105. A pulley 106 is attached to at least one end (left side in this example) of the rotating shaft 101. Although not particularly illustrated, the pulley 106 is connected to a pulley provided on the output shaft of the crushing device drive device via a belt.

  The drum part 102 has a cylindrical peripheral body part 102a and left and right attachment parts 102b that protrude radially inward from the inner wall part of the peripheral body part 102a. The peripheral body portion 102 a extends from the vicinity of one crusher frame 20 to the vicinity of the other crusher frame 20, and the outer peripheral surface thereof faces the downstream end portion of the feed conveyor 12. On the other hand, the mounting portion 102b is located slightly inside from the left and right ends of the peripheral body portion 102a, and holds the bearing 107 on the inner peripheral side thereof. A stopper portion 102c is formed on the inner peripheral portion of the mounting portion 102b, and the stopper portion 102c abuts on the bearing 107, thereby restraining the left and right movement of the bearing 107 with respect to the mounting portion 102b. Further, the rotating shaft 101 is passed through the left and right bearings 107. The bearing 107 is fitted so as to be in contact with the left and right of the stepped portion 101a provided at the central portion in the left-right direction of the rotating shaft portion 101, and is sandwiched between the fixture 108 attached to the rotating shaft portion 101 and the stepped portion 101a. The left and right movements with respect to the portion 101 are restricted. As described above, the drum unit 102 is attached to the rotating shaft unit 101 via the bearing 107 and is rotatable with respect to the rotating shaft unit 101.

  In the present embodiment, a bearing is used as the bearing 107, but it can be replaced as long as it can rotatably support the drum portion 102 with respect to the rotating shaft portion 101, such as a sliding bearing.

  The connecting member 103 described above uses a shear pin that breaks in preference to other components when an impact load exceeding an allowable value (allowable shear stress) is applied. The allowable value of the connecting member 103 is set to a value that is approximately the same as or smaller than the allowable shear stress of the shear pin 43 that restrains the anvil frame 40 described later. In the present embodiment, one connecting member 103 is provided on each of the left and right sides of the crushing rotor 15, but the quantity can be changed as appropriate. As shown in FIG. 4, one end of the connecting member 103 is fixed to an outer wall surface facing the left and right outer sides of the mounting portion 102b of the drum portion 102 by a pressing plate 111 and a bolt 112 (not shown in FIG. 5). The other end of the connecting member 103 is fixed to an outer wall surface facing the left and right outer sides of the bracket 115 fixed to the rotating shaft portion 101 by a pressing plate 113 and a bolt 114 (both not shown in FIG. 5). The connecting member 103 is fixed in a posture along the radial direction of the crushing rotor 15 such that a portion that breaks in preference to other components is located between the presser plates 111 and 113.

  A plurality of crushing bits 36 are provided on the outer peripheral surface of the peripheral drum portion 102a of the drum portion 102 described above. The crushing bit 36 is attached to the surface of each bit holder 35 provided on the outer peripheral surface of the drum portion 102 that faces the front side in the normal rotation direction of the drum (clockwise in FIG. 4). The crushing bit 36 is fixed to the bit holder 35 by fastening a nut 37 to the bolt 100 inserted into the crushing bit 36 and the bit holder 35 from the crushing bit 36 side. Each crushing bit 36 hits the object to be crushed with the blade surface (collision surface) preceding the bit holder 35 when the crushing rotor 15 rotates in the forward rotation direction.

  As previously shown in FIG. 3, the anvil 34 has a collision surface 39 on which an object to be crushed that has been introduced into the crushing chamber 27 collides. The crushing rotor 15 is attached to the upstream side of the crushing rotor 15 in the forward direction with respect to the attaching portion of the curved plate 41 in the anvil frame (holding member) 40 so that the collision surface 39 faces the crushing pieces that go around. Although not particularly shown, the anvil 34 extends from the vicinity of one crusher frame 20 to the vicinity of the other crusher frame 20. The anvil frame 40 that holds the anvil 39 is supported so as to be pivotable in the front-rear direction about the pivot shaft 31 supported by the crusher frame 20 above the pivot shaft 22 of the above-described pressing feeder device 14. In normal times, the support block 42 fixed to the inner wall surface of the crusher frame 20 is supported via a shear pin 43 to restrain the rotation operation. During operation, when an impact load exceeding the allowable shear stress of the shear pin 43 is applied to the anvil 34, the shear pin 43 is broken and the restraint of the anvil frame 40 is released, and the anvil frame 40 rotates about the rotation shaft 31. The anvil 34 is separated from the crushing chamber 27.

  Here, the crushing chamber 27 means a space that accommodates the crushing rotor 15 and crushes the material to be crushed. On the outer peripheral surface of the crushing rotor 15, the curved plate 28, the anvil 34, the curved plate 41, and the screen (in order) from the downstream end of the feed conveyor 12 in the normal rotation direction (clockwise direction in FIG. 3). A crushing chamber 27 for accommodating the crushing rotor 15 is formed by the curved plate 28, the anvil 34, the screen 38, and the like.

  The screen 38 is a plate-like sieve member that has a large number of discharge holes (not shown) and is curved in an arc shape, and is a lower half side of the outer peripheral surface of the crushing rotor 15 (the crushing rotor 15 It is detachably held on a screen holder 44 formed in an arc shape facing the front side in the forward rotation direction). On the screen holder 44, a plurality of (four in this embodiment) screens 38 are placed in the rotation direction of the crushing rotor 15 so as to face the outer peripheral surface of the crushing rotor 15 with a gap.

  The screen holder 44 that supports the screen 38 is configured to rotate in the vertical direction as the cylinder 47 expands and contracts with a shaft 45 extending in the machine body width direction as a fulcrum, and from the state shown in FIG. It rotates to the position where the screen 38 descends below the crusher frame 20. Accordingly, the screen 38 can be inserted and removed from the lower side of the crusher frame 20 to the left and right.

  The cylinders 47 are, for example, hydraulic cylinders (or electric cylinders), and one cylinder is installed on each of the inner wall surfaces of the left and right crusher frames 20. Both cylinders 47 are located on the front side of the crushing device 13, and the bottom side is rotatably connected to a bracket 49 (see FIG. 3) fixed to the crusher frame 20. It extends to the rear side as an end and expands and contracts in the front-rear direction. A slider 48 is connected to the rod tip of each cylinder 47, and this slider 48 is connected to the vicinity of the front end of the screen holder 44 via an arm 46. Both ends of the arm 46 are rotatably connected to the slider 48 and the screen holder 44. As can be seen from FIG. 3, the slider 48 and the arm 46 constitute a link mechanism, and the reciprocating motion of the slider 48 in the front-rear direction accompanying the expansion and contraction of the cylinder 47 passes through the rotation of the arm 46. 44 is converted into vertical movement.

  The lengths of the screen holder 44 and the arm 46, the front and rear positions of the cylinder 47, and the like are generally along the tangential direction of the crushing chamber 27 when the screen holder 44 is raised (the state shown in FIG. 3). Therefore, the screen holder 44 is pushed up by the link mechanism and the posture holding force is effectively obtained.

  Next, the operation of the crusher of the present embodiment having the above configuration will be described.

  When an object to be crushed is put into the hopper 11 by a heavy machine (such as a hydraulic excavator) equipped with an appropriate work tool such as a grapple, the object to be crushed is placed on the conveyor belt 17 of the feed conveyor 12 and is circulated and driven. It is conveyed toward the crushing device 13 by the belt 17. When the object to be crushed is conveyed to the vicinity of the pressure feeder device 14, the press roller 24 rides on the object to be crushed, and the object to be crushed is pressed against the conveying surface of the feed conveyor 12 by the weight of the pressing roller 24. In this way, the presser roller 24 introduces the material to be crushed into the crushing chamber 27 in cooperation with the feed conveyor 12 in a state where the material to be crushed is sandwiched between the pressure roller 24 and the feed conveyor 12. At that time, the object to be crushed protrudes into the crushing chamber 27 in a cantilever shape with a portion sandwiched between the pressing roller 24 and the feed conveyor 12 as a fulcrum.

  The crushing bit 36 of the crushing rotor 15 that rotates at high speed collides with the object to be crushed protruding into the crushing chamber 27 from below, whereby the object to be crushed is roughly crushed (primary crushing). The fragments to be crushed and thus splashed into the crushing chamber 27 collide with the anvil 34 and are further crushed by the impact force (secondary crushing). Of the crushed pieces that have been secondarily crushed, those that are already small enough to pass through the screen 38 are discharged through the screen 38, and those that do not pass are circulated in the crushing chamber 27 as the crushing rotor 15 rotates. Then, it is further crushed by receiving a collision action, a shearing action, a grinding action, etc. with the anvil 34, the crushing bit 36, and the inner wall surface of the crushing chamber 27 such as the screen 38 (third crushing). Of the crushed pieces that have been circulated, the crushed pieces that have undergone tertiary crushing and have been refined to a size that passes through the discharge holes of the screen 38 are sequentially discharged from the crushing chamber 27 through the screen 38. The crushed material discharged from the crushing chamber 27 falls onto the discharge conveyor 3 through a chute (not shown), is conveyed by the discharge conveyor 3, and is discharged outside the apparatus.

  Here, when foreign matter such as a metal lump is mixed between the bit 36 and the anvil 34 by being mixed into the object to be crushed, the rotational moment of the crushing rotor 15 is instantaneously transmitted to the anvil 34. A larger impact force acts on the anvil 34 and the crushing bit 36 than when crushing the crushed material.

  During the crushing operation, the impact force acting on the anvil 34 is transmitted to the shear pin 43 via the anvil frame 40. When the excessive impact force due to the biting of foreign matter exceeds the allowable shear stress of the shear pin 43, the shear pin 43 It breaks and the restraint of the anvil frame 40 is released. The anvil frame 40, which has been restrained by the shear pin 43, is rotated by the impact force applied to the anvil 34. As a result, the anvil 34 and the screen 38 are moved away from the crushing chamber 27, and the crushing chamber 27 is opened to help discharge foreign matter.

  At this time, in this embodiment, the crushing rotor 15 is provided with a connecting member 103 that breaks prior to other components when an excessive impact force that exceeds the assumption is applied to the crushing bit 36. Therefore, when an excessive impact force that breaks the shear pin 43 is generated between the crushing bit 36 and the anvil 34, the shear pin 103 of the crushing rotor 15 is broken together with the shear pin 43 of the anvil frame 40. When the shear pin 103 breaks, the restriction on the rotating shaft portion 101 of the drum portion 102 of the crushing rotor 15 to which the crushing bit 36 is attached is released, and the inertial force of the drum portion 102 separated from the rotating shaft portion 101 is greatly reduced. . By reducing the inertial force of the drum portion 102 in this way, the collision time between the crushing rotor 15 and the anvil 34 via the foreign matter when the foreign matter is bitten becomes longer. As a result, it is possible to diffuse the time distribution of the impact force accompanying the foreign object biting and to suppress an instantaneous increase in the impact force.

  Thereby, the impact force which acts on the main structures of the crushing device 13 such as the crushing bit 36, the bit holder 35, the other components of the crushing rotor 15, the anvil frame 40, etc. can be reduced. Can be suppressed.

  In the above embodiment, the case where a shear pin is used as the connecting means 103 of the rotating shaft portion 101 and the drum portion 102 has been described as an example in the present embodiment. However, the drum portion 102 is usually the rotating shaft portion 101. When the impact force of a certain level or more acts on the crushing bit 36, the drum portion 102 may be rotated with respect to the rotating shaft portion 101. Therefore, for example, the drum portion 102 is connected to the rotating shaft portion 101 using a static friction force, and the drum portion 102 rotates relative to the rotating shaft portion 101 when an impact load exceeding the maximum static friction force is applied. The structure, the structure which connects the drum part 102 elastically with respect to the rotating shaft part 101, and releases the excessive impact force added to the crushing bit 36 etc. are also considered.

  Further, the case where the shear pin 43 is used as the rotation permission means for allowing the rotation operation of the anvil frame 40 and opening the crushing chamber 27 when an impact force exceeding the allowable value is applied to the anvil has been described as an example. However, when the anvil frame 40 is elastically engaged with the stationary body including the crusher frame 20 and an excessive impact force acts on the anvil and the engagement with the stationary body is released, A configuration in which the constraint is released can also be adopted. This configuration is detailed in, for example, International Application No. PCT / JP2009 / 55862.

  Although the present invention has been described by way of example when applied to a crusher capable of traveling on its own, the present invention is not limited to this, and a portable crusher that can be pulled and traveled, or a portable type that can be lifted and transported by a crane or the like. The present invention is also applicable to a crusher, and further to a stationary crusher arranged as a fixed machine in a plant or the like. Moreover, although the case where this invention was applied to the crushing machine which supplies a to-be-crushed object from a horizontal direction with respect to the crushing rotor rotated with a horizontal axis | shaft was mentioned as an example, crushing by providing a hopper on a crushing apparatus The present invention can also be applied to a type of crusher that supplies an object to be crushed from above to a rotor. In these cases, similar effects can be obtained.

12 Feed Conveyor 13 Crushing Device 14 Press Feeder Device 15 Crushing Rotor 27 Crushing Chamber 34 Anvil 38 Screen 40 Anvil Frame 43 Shear Pin (Rotation Permissive Means)
101 Rotating shaft portion 102 Drum portion 103 Connecting member

Claims (4)

A feeder for supplying a material to be crushed, a crushing rotor disposed opposite to a downstream end of the feeder in the direction of conveying the material to be crushed, and a crushed piece circulating around the crushing chamber in a crushing chamber containing the crushing rotor In a crusher provided with an anvil provided so as to collide with, and a screen having a plurality of discharge holes and arranged to face the outer peripheral surface of the crushing rotor,
The crushing rotor is
A rotating shaft provided rotatably on the crusher frame;
A drum portion provided concentrically with the rotary shaft portion on the outer peripheral portion of the rotary shaft portion, and rotatable with respect to the rotary shaft portion;
The drum portion is connected to the rotating shaft portion, and includes a connecting member for releasing the connection between the drum portion and the rotating shaft portion when an impact load exceeding a set value is applied to the crushing rotor. A crusher characterized by.   2. The crusher according to claim 1, wherein the connecting member is a shear pin that breaks preferentially over other components when an impact load exceeding an allowable shear stress is applied. An anvil frame that supports the anvil and is pivotable with respect to the crusher frame;
A rotation permission means for restricting the rotation operation of the anvil frame and allowing the rotation operation of the anvil frame and opening the crushing chamber when an impact force exceeding an allowable value is applied to the anvil; The crusher according to claim 1, wherein the crusher is provided.   The crusher according to claim 3, wherein the connecting member releases the connection between the drum portion and the rotating shaft portion with an impact force that is equal to or less than an allowable value of the rotation permission means.

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