JP2004174451A - Jaw crusher - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a jaw crusher in which a drive pulley and a flywheel can be positioned surely without being affected so much by the machining errors of them and a fitting structure can be simplified. <P>SOLUTION: A second fitting part 83 having a prescribed length and a same diameter as that of a first fitting part is arranged on the end part of a main shaft 80, and the drive pulley 38, a shaft fitting bearing 85 and a swing jaw fitting bearing 84 are fixed to the part 83 by using a fitting bolt 89. The pulley 38 can be positioned surely in the shaft direction without being affected by the machining errors of the bore size of the pulley 38 and the diameter of the shaft 80 since the shaft of the part 83 is not taper as usual but straight. The fitting structure can be simplified since the bearing 85 and the bearing 84 are held by the pulley 38. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a jaw crusher for crushing a raw material by moving a pair of jaws close to and away from each other.
[0002]
[Background Art]
Conventionally, a jaw crusher that crushes a raw material by moving a swing jaw close to and away from a fixed jaw is known (for example, Patent Document 1).
In such a jaw crusher, the swing jaw is supported on the eccentric portion of the main shaft via a swing jaw mounting bearing, and the swing jaw swings by rotating this shaft.
The shaft is rotatably supported at both ends by a frame via shaft mounting bearings. A drive pulley is attached to one end of the shaft, and a flywheel is attached to the other end.
[0003]
These drive pulleys and flywheels are fitted by being fitted from the end of the shaft, but the drive pulley and flywheel mounting portions provided on the shaft are formed in a tapered shape that decreases in diameter toward the tip of the shaft. Have been. Accordingly, the inner surfaces of the mounting portions of the drive pulley and the flywheel are also formed in a tapered shape.
In addition, the swing jaw mounting bearing and the shaft mounting bearing are mounted by screwing a nut or the like into a threaded portion formed on the shaft from the shaft end side. Thereafter, the drive pulley or the flywheel is positioned and attached to a step formed on the shaft end side with respect to the screw portion.
[0004]
[Patent Document 1]
JP-A-2002-95992 (FIG. 1)
[0005]
[Problems to be solved by the invention]
However, since the mounting portion provided on the shaft, the driving pulley, and the flywheel-side mounting portion are each tapered, an axial displacement may occur at the fitting position of the driving pulley or the flywheel depending on a processing error of each mounting portion. In some cases, positioning could not be performed reliably. For this reason, conventionally, there is a problem that processing is troublesome in order to minimize errors.
In addition, a threaded portion or the like must be formed on the shaft, and the shape of the shaft becomes complicated, and it takes time to process. In addition, the driving pulley or flywheel must be further mounted after the swing jaw mounting bearing and the shaft mounting bearing are screwed with nuts, so that the mounting process is complicated.
[0006]
An object of the present invention is to provide a jaw crusher that can reliably position a driving pulley and a flywheel without being significantly affected by a processing error and has a simple mounting structure.
[0007]
[Means for Solving the Problems and Effects]
A jaw crusher according to claim 1 of the present invention is a fixed jaw provided on a frame, a swing jaw swinging with respect to the fixed jaw, and an eccentric for pivotally supporting the swing jaw via a swing jaw mounting bearing. A shaft attached to the frame via a shaft attachment bearing, and a drive pulley or flywheel attached to an end of the shaft. At the end of the shaft, a drive pulley or flywheel is attached. The mounting portion is provided with the same diameter over a predetermined length in the axial direction, and the swing jaw mounting bearing and the shaft mounting bearing are held on the shaft by a driving pulley or a flywheel.
[0008]
In the present invention having this configuration, the mounting portion to which the drive pulley or the flywheel is mounted on the shaft is formed in a straight shape with the same diameter. Therefore, unlike the conventional tapered shape, the axially fitted position of the drive pulley or flywheel on the shaft is not significantly affected by machining errors in the shaft diameter or the hole diameter of the drive pulley or flywheel. Therefore, the positioning of the driving pulley or the flywheel is ensured, and the processing is simplified.
Further, since the swing jaw mounting bearing and the shaft mounting bearing are held on the shaft by the drive pulley or the flywheel, it is not necessary to form a screw portion or the like on the shaft unlike the related art. Therefore, the shape of the shaft is simplified, and the processing steps are also simplified.
In addition, holding members for individually holding these bearings with respect to the shaft are not required, and the mounting structure is simplified. As a result, the number of parts of the mounting structure is reduced, the manufacturing cost is reduced, and the weight reduction of the jaw crusher is promoted.
[0009]
According to the second aspect of the present invention, in the jaw crusher according to the first aspect, the shaft is provided with another mounting portion to which a shaft mounting bearing is mounted over a predetermined length in the axial direction. And a drive pulley or a mounting portion for a flywheel have the same diameter and are continuous in the axial direction.
In the present invention having this configuration, in the shaft, the mounting portion for the shaft mounting bearing and the mounting portion for the drive pulley or the flywheel are formed in the same diameter and continuous shape. Processing can be performed in a processing step, processing of the shaft is facilitated, and the manufacturing step is simplified.
[0010]
According to the third aspect of the present invention, in the jaw crusher according to the first or second aspect, the driving pulley or the flywheel is attached with a single attachment bolt screwed to substantially the center of the end surface of the shaft. The mounting bolt includes a threaded portion screwed along the axial direction of the shaft, and a non-threaded portion provided at a predetermined length on a base end side of the threaded portion. I do.
Conventionally, when a drive pulley or flywheel is fixed to a shaft, a plurality of attachments are placed at a predetermined distance from the shaft center in order to secure sufficient durability against bending load and shear load applied to the fixed part. Bolts were arranged and fixed by screwing them along the axial direction of the shaft.
On the other hand, in the present invention, the mounting bolt is provided with a threaded portion screwed to the shaft at the distal end side and a non-threaded portion of a predetermined length formed at the base end side of the threaded portion. Therefore, the non-threaded portion functions as a torsion bar, and absorbs the torsional torque applied to the mounting bolt when the shaft rotates. Therefore, the torsional rigidity of the mounting bolt is increased, and sufficient durability can be ensured only by providing one mounting bolt substantially at the center of the end face of the shaft along the axial direction. This further simplifies the mounting structure of the drive pulley or flywheel, further reduces the number of parts, and further simplifies the assembly process.
[0011]
BEST MODE FOR CARRYING OUT THE INVENTION
[Schematic description of overall configuration]
Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
1 to 5 are a front view, a rear view, a right side view, a left side view, and a plan view showing the self-propelled crusher 1 according to the present embodiment. In this embodiment, for convenience of explanation, the right side in FIG. 3 is the front side, and the left side is the rear side.
[0012]
The self-propelled crusher 1 may be disposed at a building demolition site or the like and used for crushing concrete or asphalt lumps. In the present embodiment, the self-propelled crusher 1 is exclusively disposed at a mine or a quarry, It is used to coarsely crush natural stone to a predetermined particle size. For this reason, the overall length, overall width, and overall height are large, and they belong to large self-propelled crushers.
[0013]
Such a self-propelled crusher 1 includes a main body unit 10 having a pair of lower traveling bodies 11, a supply unit 20 mounted on the rear side of the main body unit 10 and supplied with raw materials, A jaw crusher 30 mounted on the front side of the main unit 20; a power unit 40 mounted on the front side of the jaw crusher 30; And the discharge conveyor 50 that has been put out.
[0014]
The main body unit 10 includes a main frame (track frame) 14 in which left and right side frames 12 continuously provided in the front-rear direction are connected by a plurality of connection frames 13 (FIG. 2). The lower traveling body 11 is attached to a lower side of the vehicle. The lower traveling body 11 has a configuration in which a crawler 18 is wound around a sprocket 16 driven by a hydraulic motor 15 at the front and an idler 17 at the rear.
[0015]
The supply unit 20 includes a rear frame 23 in which left and right side frames 21 protruding rearward are connected by a substantially square connection frame 22 having an opening 22A. A grizzly feeder 24 is placed on the upper portion of the rear frame 23 via a plurality of coil springs, and the grizzly feeder 24 is driven by a vibration device 25. A hopper 26 is provided on the upper part of the grizzly feeder 24 so as to surround three sides thereof, and the raw material is put into the hopper 26 which is opened upward. Further, a discharge chute 27 that guides the raw materials sorted and dropped by the grizzly to a lower discharge conveyor 50 is provided below the grizzly feeder 24. In the hopper 26 of the present embodiment, the left and right wing portions 28 are provided so as to be foldable with respect to the main body portion, and are folded downward by removing the upper end of the support bar 29. As a result, the overall height of the supply unit 20 is reduced, and the transportation restrictions on the trailer can be cleared.
[0016]
As shown in FIG. 6, the jaw crusher 30 includes a back wall plate 32 reinforced by a plurality of ribs and a crusher frame (frame) 34 connecting the left and right side wall plates 31 with a plurality of ribs. A fixed jaw 35 is attached to the inside of the fixed jaw 35, and a swing jaw 36 having a tooth surface approaching substantially vertically is disposed in front of the fixed jaw 35. The swing jaw 36 is suspended from an eccentric portion 81 (FIG. 7) of a main shaft (shaft) 80 rotatably installed between the side wall plates 31 at an upper side thereof, and a lower side receives a reaction force at the time of crushing. It is supported by the reaction force receiving link mechanism 60, and is constantly urged by the tension link mechanism 70 toward the reaction force receiving link mechanism 60.
[0017]
Here, the reaction force receiving link mechanism 60 supports the toggle plate 61 having one end locked to the back surface of the swing jaw 36, the other end of the toggle plate 61, and rotates around the fixed link pin 63. A toggle link 64 and a bear lock cylinder 65 whose lower end is pivotally supported by the toggle link 64 are generally formed. The bear lock cylinder 65 is rotatably supported (trunnion structure) on the cross member 33 side. The outlet gap W between the lower ends of the jaws 35 and 36 can be adjusted by moving the rod 66 of the bare lock cylinder 65 forward and backward. That is, the reaction force receiving link mechanism 60 is an exit gap adjusting link mechanism 62 that moves the swing jaw 36 toward and away from the fixed jaw 35 via the toggle link 64 and the toggle plate 61 by driving the bear lock cylinder 65.
[0018]
Further, the tension link mechanism 70 is disposed substantially at the center of the reaction force receiving link mechanism 60, and has one end pivotally supported by the swing link 36 and the fixed link pin 63. The tension rod 73 is substantially constituted by a tension lever 72 supported, a tension rod 73 having one end pivotally supported by the tension lever 72, and a tension spring 74 for urging the tension rod 73 in a predetermined direction. 74 is attached to the toggle link 64 described above.
[0019]
In such a jaw crusher 30, when the drive pulley 38 provided at one end of the main shaft 80 is driven by the hydraulic motor 39 via the V-belt, the rotation of the main shaft 80 causes the swing jaw 36 to function as a swing link, The raw material is crushed between the fixed jaws 35. At this time, in the jaw crusher 30 of the present embodiment, the reaction force receiving link mechanism 60 is of an up-thrust type so that the swing jaw 36 swings from the upper side to the lower side with respect to the tooth surface of the fixed jaw 35. I have.
[0020]
The power unit 40 includes a base frame 42 in which left and right side frames 41 are connected by a plurality of connection frames (not shown). On the base frame 42, an engine, a hydraulic pump, a fuel tank 43, a hydraulic oil tank 44, and the like are mounted via appropriate mounting brackets and cross members. A control valve that distributes hydraulic pressure from the hydraulic pump to the hydraulic motor of the lower traveling body 11, the vibration device 25 of the grizzly feeder 24, the hydraulic motor 39 of the jaw crusher 30, the hydraulic motor for driving the discharge conveyor 50, and the like, It is housed in a housing space surrounded by the base frame 42.
[0021]
The discharge conveyor 50 has a rear portion located behind the discharge port at the lower end of the discharge chute 27 and discharges uncrushed raw materials discharged from the discharge chute and crushed materials dropped from the outlet of the jaw crusher 30 to the front. Drop it from the place and deposit it. In addition, when a foreign material such as a reinforcing bar or a metal piece is included as a raw material, a magnetic separator can be attached to the front side of the discharge conveyor 50 to remove the foreign material. The crushed material from the discharge conveyor 50 may not be deposited on the ground, but may be transported to a remote location using a secondary conveyor, a tertiary conveyor, or the like.
[0022]
[Main shaft and drive pulley mounting structure]
Next, the mounting structure of the main shaft 80 and the driving pulley 38 will be described.
FIG. 7 is a partial cross-sectional view illustrating a mounting structure of the main shaft 80. The drive pulley 38 is attached to one end of the main shaft 80, and the flywheel (not shown) is attached to the other end. Since these attachment structures are the same, the attachment structure on the drive pulley 38 side will be described below. .
[0023]
In FIG. 7 and FIG. 6 described above, the swing jaw 36 is attached to the eccentric portion 81 of the main shaft 80 via a swing jaw attachment bearing 84. The main shaft 80 is rotatably supported by a side wall plate 31 via a shaft mounting bearing 85 at a first mounting portion (another mounting portion) 82 formed over a predetermined length on the end side of the eccentric portion 81. ing. At the end of the main shaft 80, a second attachment portion (attachment portion) 83 having a predetermined length formed continuously with the same diameter as the first attachment portion 82 is provided. The pulley 38 is fixed.
[0024]
The swing jaw mounting bearing 84 is of a self-aligning type having an aligning property. The inner ring 841 is fitted to the eccentric portion 81 of the main shaft 80, and the outer ring 842 is fitted to the inner periphery of the mounting hole 361 on the upper side of the swing jaw 36. ing. In the inner ring 841 of the swing jaw mounting bearing 84, a peripheral end face on the inner side in the axial direction (the center side of the main shaft 80) is in contact with the ring spacer 843 positioned at the step 811. On the other hand, a fixing member 844 bolted to the swing jaw 36 is attached to a peripheral end surface of the outer ring 842 of the swing jaw attachment bearing 84 on the outer side in the axial direction (end side of the main shaft 80). That is, the ring member 843 and the fixing member 844 prevent the outer ring 842 from coming off in the axial direction.
[0025]
The shaft mounting bearing 85 is a self-centering type similar to the swing jaw mounting bearing 84, and the inner ring 851 is fitted to the first mounting portion 82 of the main shaft 80, and the lower side is formed at the upper end of the side wall plate 31. It is placed on a half-shaped lower bearing 311, and the upper side is covered with a remaining half-shaped upper bearing 312. The upper bearing 312 is fixed to the lower bearing 311 by bolting. A fixing member 853 is provided on each of both axial end surfaces of the shaft mounting bearing 85, and these fixing members 853 are bolted to the lower bearing portion 311 and the upper bearing portion 312, so that the outer ring 852 comes out in the axial direction. Has been prevented.
[0026]
A mounting spacer 86 is interposed between the shaft mounting bearing 85 and the swing jaw mounting bearing 84 across the eccentric stepped portion between the first mounting portion 82 and the eccentric portion 81. The mounting spacer 86 is in contact with the inner rings 841 and 851 of the bearings 84 and 85, and fins 861 are formed on the outer periphery toward both sides in the axial direction. These fins 861 are inserted into gaps formed in the fixing members 844 and 853 to form a labyrinth seal between the mounting spacer 86 and the fixing members 844 and 853, and the swing jaw mounting bearing 84 and the shaft mounting bearing 85 are formed. To prevent dust and the like from invading
[0027]
The drive pulley 38 penetrates the inner periphery of the fixed member 853 on the outer side of the shaft mounting bearing 85 and is in contact with the inner ring 851 of the shaft mounting bearing 85. Further, fins 383 are formed on the outer periphery of the contact portion of the drive pulley 38 with the inner ring 851 similarly to the mounting spacer 86, and the fins 383 are inserted into the gaps of the fixing member 853 to form a labyrinth seal. I have. Key grooves 382 and 831 are formed on the inner periphery of the drive pulley 38 and the outer periphery of the second mounting portion 83, respectively, and the drive pulley 38 is fixed by the key 87 so as not to rotate with respect to the main shaft 80.
[0028]
Such a driving pulley 38 is fixed in the axial direction by a single mounting bolt 89 via a holding member 88 substantially at the center of the end face of the main shaft 80. A mounting hole 832 through which the mounting bolt 89 is inserted is formed in the main shaft 80 along the axial direction. The mounting hole 832 has a large diameter on the front side and has an inner periphery on the back side. Screws are formed. The distal end side of the mounting bolt 89 is a threaded portion 891 that is screwed to a threaded portion on the inner side of the mounting hole 832. The base end side of the mounting bolt 89 has a predetermined length that is not screwed to the main shaft 80. A non-threaded portion 892 is provided. In the mounting bolt 89 having such a structure, since the non-threaded portion 892 serves as a torsion bar, the torsional rigidity of the mounting bolt 89 is high.
[0029]
Also, with the mounting bolt 89, the holding member 88 presses the drive pulley 38, the inner ring 851 of the shaft mounting bearing 85, the mounting spacer 86, the inner ring 841 of the swing jaw mounting bearing 84, and the ring spacer 843 against the step portion 811. The entire drive pulley 38, shaft mounting bearing 85, mounting spacer 86, and swing jaw mounting bearing 84 are held between the holding member 88 and the step 811.
[0030]
(Jaw crusher operation)
The operation of the jaw crusher 30 will be described.
When the hydraulic motor 39 is driven to rotate the drive pulley 38, the main shaft 80 rotates while being supported by the shaft mounting bearing 85. At this time, the swing jaw 36 swings due to the eccentric portion 81 rotating eccentrically.
Since the lower side of the swing jaw 36 is supported by the up-thrust type reaction force receiving link mechanism 60, the swing jaw swings from above to below when approaching the fixed jaw 35 by the swing of the toggle plate 61. Therefore, when the raw material is charged between the fixed jaw 35 and the swing jaw 36, the raw material is crushed to the size of the exit gap W by the swing of the swing jaw 36. The crushed material is conveyed by a discharge conveyor 50 disposed below the jaw crusher 30 and discharged to the outside of the self-propelled crusher 1.
[0031]
Therefore, according to the present embodiment, the following effects can be obtained.
(1) The second attachment portion 83 to which the drive pulley 38 and the flywheel are attached is formed straight with the same diameter. Therefore, unlike the conventional tapered mounting portion, the mounting position of the driving pulley 38 and the flywheel in the axial direction is significantly reduced due to the processing error of the hole diameter of the driving pulley 38 and the flywheel and the shaft diameter of the second mounting portion 83. Not affected. Therefore, the drive pulley 38 and the flywheel can be reliably positioned on the main shaft 80. Further, since the second mounting portion 83 of the main shaft 80 is formed straight with the same diameter, it can be easily processed.
[0032]
(2) Since the drive pulley 38 or the flywheel directly contacts the shaft mounting bearing 85 and the shaft mounting bearing 85 contacts the swing jaw mounting bearing 84 via the mounting spacer 86, the driving pulley 38 By simply fixing the shaft mounting bearing 85 to the main shaft 80, the shaft mounting bearing 85 and the swing jaw mounting bearing 84 can be fixed. Therefore, the mounting structure of the shaft mounting bearing 85 and the swing jaw mounting bearing 84 can be simplified. Further, unlike the related art, there is no need to form a thread on the outer periphery of the main shaft 80, so that the processing of the main shaft 80 is simplified.
As a result, the number of parts can be reduced, so that the manufacturing cost of the jaw crusher 30 can be reduced and the weight can be reduced.
[0033]
(3) Since the first mounting portion 82 and the second mounting portion 83 are formed as continuous straight shafts having the same diameter, the mounting portions 82 and 83 can be easily processed in a single processing step. The manufacturing process can be simplified.
[0034]
(4) One mounting bolt 89 is provided substantially at the center of the end face of the main shaft 80, and the mounting bolt 89 is screwed along the axial direction of the main shaft 80, so that the driving pulley 38 (or flywheel) is provided. ), The shaft mounting bearing 85 and the swing jaw mounting bearing 84 are held in the axial direction. At this time, the mounting bolt 89 is screwed to the main shaft 80 at a screw portion 891 on the distal end side, and a non-threaded portion 892 is formed on the base end side. Even when the torsion torque is received by the pulley 38 (or flywheel), the swing jaw 36, or the like, the non-threaded portion 892 functions as a torsion bar and can absorb this torsion torque to some extent. Therefore, the torsional rigidity of the mounting bolt 89 can be increased, and sufficient durability can be ensured only by providing one mounting bolt 89 substantially at the center of the end face of the main shaft 80. Thereby, the mounting structure of the drive pulley 38 and the flywheel can be further simplified, and the number of parts can be further reduced, so that the assembling process can be further simplified.
[0035]
(5) Since the reaction force receiving link mechanism 60 is of an up-thrust type in which the toggle plate 61 contacts the swing jaw 36 obliquely upward from below, the swing jaw 36 is attached to the surface of the fixed jaw 35. An operation of pressing the raw material downward from above is performed. Accordingly, the raw material pressed against the surface of the fixed jaw 35 is easily pushed downward and easily falls, and the outlet gap W of the jaw crusher 30 is not clogged, so that the discharge property can be improved. This is particularly useful because the raw material pressed by the swing jaws 36 does not adhere to the fixed jaws 35 and clog the outlet gap W even when the raw materials are soft.
Further, in the up-thrust type reaction force receiving link mechanism 60, since the angle at which the swing jaw 36 approaches the fixed jaw 35 is larger than that of the down thrust type, the raw material between the swing jaw 36 and the fixed jaw 35 is reduced. It is hard to slip, and the wear of each of the jaws 35 and 36 can be reduced, and the durability can be improved.
[0036]
It should be noted that the present invention is not limited to the above-described embodiment, but includes modifications and improvements as long as the object of the present invention can be achieved.
For example, in the present embodiment, the drive pulley 38 and the flywheel are attached at both ends of the main shaft 80 with the same attachment structure, but the invention is not limited to this, and at least one of the drive pulley 38 and the flywheel is attached to Such a mounting structure is included in the present invention.
[0037]
In the present embodiment, the first mounting portion 82 and the second mounting portion 83 are formed continuously with the same diameter. However, the present invention is not limited to this, and they may be formed with a step. In this case, if a spacer similar to the mounting spacer 86 is interposed between the driving pulley 38 and the shaft mounting bearing 85, the shaft pulley 38 and the swing jaw mounting bearing 84 are fixed by fixing the driving pulley 38 in the axial direction. Can be satisfactorily positioned and fixed.
[0038]
In the present embodiment, one mounting bolt 89 is provided substantially at the center of the end face of the main shaft 80. However, the present invention is not limited to this, and a plurality of mounting bolts may be used. Even in this case, if the second mounting portion 83 is formed on a straight shaft having the same diameter and holds the shaft mounting bearing 85 and the swing jaw mounting bearing 84 with the driving pulley 38 or the flywheel, the object of the present invention is achieved. Can be achieved.
[0039]
The jaw crusher 30 is mounted on the self-propelled crusher 1, but is not limited thereto and may be used as a stationary crusher.
[0040]
The best configuration and method for carrying out the present invention have been disclosed in the above description, but the present invention is not limited to this. That is, the present invention has been particularly illustrated and described primarily with respect to particular embodiments, but may be modified in form with respect to the embodiments described above without departing from the spirit and scope of the invention. Those skilled in the art can make various modifications in terms of material, quantity, and other detailed configurations.
Therefore, the description of the shapes, materials, and the like disclosed above is merely an example for facilitating the understanding of the present invention, and does not limit the present invention. The description by the name of the member excluding some or all of the limitations such as is included in the present invention.
[Brief description of the drawings]
FIG. 1 is a front view showing a self-propelled crusher according to an embodiment of the present invention.
FIG. 2 is a rear view showing the self-propelled crusher.
FIG. 3 is a right side view showing the self-propelled crusher.
FIG. 4 is a left side view showing the self-propelled crusher.
FIG. 5 is a plan view showing the self-propelled crusher.
FIG. 6 is a sectional view showing a jaw crusher of the self-propelled crusher.
FIG. 7 is a sectional view showing a mounting structure of a shaft of the jaw crusher.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Self-propelled crusher, 30 ... Jaw crusher, 34 ... Crusher frame (frame), 35 ... Fixed jaw, 36 ... Swing jaw, 80 ... Main shaft (shaft), 81 ... Eccentric part, 82 ... First mounting part (Another mounting portion), 83: second mounting portion (mounting portion), 84: swing jaw mounting bearing, 85: shaft mounting bearing, 86: mounting spacer, 89: mounting bolt, 891: screwed portion, 892: non-mounting Screw part.

Claims (3)

In the jaw crusher (30),
A fixed jaw (35) provided on the frame (34);
A swing jaw (36) swinging with respect to the fixed jaw (35);
An eccentric part (81) for supporting the swing jaw (36) via a swing jaw attachment bearing (84) is provided, and a shaft (80) attached to the frame (34) via a shaft attachment bearing (85). )When,
A drive pulley (38) or flywheel attached to the end of the shaft (80);
At the end of the shaft (80), a mounting portion (83) to which the drive pulley (38) or the flywheel is mounted is provided with the same diameter over a predetermined length in the axial direction,
The jaw crusher (30), wherein the swing jaw mounting bearing (84) and the shaft mounting bearing (85) are held on the shaft (80) by the drive pulley (38) or the flywheel. The jaw crusher (30) according to claim 1,
The shaft (80) is provided with another mounting portion (82) to which the shaft mounting bearing (85) is mounted over a predetermined length in the axial direction,
The jaw crusher (30), characterized in that the other mounting portion (82) and the driving pulley (38) or the mounting portion (83) for the flywheel have the same diameter and are continuous in the axial direction. . A jaw crusher (30) according to claim 1 or claim 2,
The drive pulley (38) or the flywheel is attached with a single attachment bolt (89) screwed into substantially the center of the end face of the shaft (80),
The mounting bolt (89) has a screw portion (891) screwed along the axial direction of the shaft (80), and a non-fixed portion provided at a base end of the screw portion (891) at a predetermined length. A jaw crusher (30) comprising a threaded portion (892).

Images