JP2008132499A - Jaw crusher and self-propelled type crushing machine equipped with the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an up-thrust type jaw crusher capable of disposing a toggle plate holding mechanism without increasing the overall height, and a self-propelled type crushing machine equipped with the same. <P>SOLUTION: A tension link mechanism 70 is provided with a tension spring 74 pressing a spring jaw 36 and a toggle link 64 to a toggle plate 61 and the tension spring 74 is fixed to the toggle link 64. When the toggle link 64 moves by a link mechanism 62 for adjusting an exit gap, the tension spring 74 simultaneously moves. Thus, as a pressing power of the tension spring 74 to the toggle 61 almost does not change and is held almost constant despite of the size of exit gap, it is not necessary to adjust the pressing power at the time of adjusting the exit gap and the adjusting work of the exit gap becomes simple. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a jaw crusher that crushes a raw material by bringing a pair of jaws close to each other and a self-propelled crusher including the jaw crusher.

  2. Description of the Related Art Conventionally, a jaw crusher that crushes raw materials by moving a swing jaw close to and away from a fixed jaw is known (for example, Patent Document 1). In this jaw crusher, the lower side of the swing jaw is supported by a reaction force receiving mechanism including a toggle plate and a toggle block. As this reaction force receiving mechanism, a down-thrust type in which a toggle plate is brought into contact with the back surface of the swing jaw from obliquely upward to downward is the mainstream. According to such a down thrust type, the swing jaw swings from below to above when approaching the fixed jaw.

Japanese Patent No. 3133766 (page 5-8, FIG. 1 and FIG. 2)

  When a reaction force receiving mechanism having a toggle plate is used, the toggle plate is only sandwiched between the toggle block and the swing jaw. Therefore, such a jaw crusher is provided with a toggle plate holding mechanism for preventing the engagement with the toggle plate during swinging of the swing jaw. The toggle plate holding mechanism includes a tension rod having one end attached to the swing jaw, and the tension rod is disposed along the toggle plate. The other end of the tension rod is urged by a tension spring, and the swing jaw is urged toward the toggle block by the urging force of the tension spring to sandwich the toggle plate.

  By the way, in the down thrust type reaction force receiving mechanism, the swing jaw is close to the fixed jaw so as to press upward from below, but at this time, since the proximity angle of the swing jaw with respect to the fixed jaw is small, the raw material is above the fixed jaw. As a result, there is a problem that the fixed jaw is worn out early. For this reason, a so-called up-thrust type reaction force receiving mechanism is also known in which the swing jaw moves close to the fixed jaw when swinging from above to below. In the jaw crusher provided with this reaction force receiving mechanism, since the angle at which the swing jaw approaches the fixed jaw is large, the raw material is difficult to slip between the jaws, and the life of the jaw can be extended.

However, in this up-thrust type, because of the structure of the reaction force receiving mechanism, the toggle plate is in contact with the swing jaw from obliquely downward to upward, so that the tension rod or tension spring is attached to the toggle plate as described above. If they are arranged so as to extend along the ends, the ends of these tension rods and tension springs protrude into the discharge space below the jaw crusher. Thereby, there exists a problem that the edge part of these tension rods and a tension spring interferes with the crushed material discharged | emitted by the discharge conveyor etc.
In order to prevent the end of the tension rod from protruding into the discharge space, the overall height of the jaw crusher must be increased. However, for example, when this jaw crusher is mounted on a self-propelled crusher, the vehicle height cannot be increased without restriction because of the height restriction during transportation.

  An object of the present invention is to provide an up thrust type jaw crusher in which a toggle plate holding mechanism can be arranged without increasing the overall height and a self-propelled crusher provided with the same.

  The jaw crusher according to claim 1 of the present invention includes a fixed jaw (35), a swing jaw (36) swinging with respect to the fixed jaw (35), and the swing jaw (36) in the jaw crusher (30). ) And a toggle plate support member (64) with which the other end of the toggle plate (61) abuts, and an up thrust type reaction force receiving mechanism. (60) and a toggle plate holding mechanism (70) for holding the toggle plate (61) between the swing jaw (36) and the reaction force receiving mechanism (60), the reaction force receiving mechanism ( 60) moves the swing jaw (36) close to and away from the fixed jaw (35) via the toggle plate support member (64) and the toggle plate (61). And the toggle plate holding mechanism (70) biases the swing jaw (36) and the toggle plate support member (64) against the toggle plate (61). The biasing means (74) is attached to the toggle plate support member (64). When the toggle plate support member (64) is moved by the outlet gap adjusting mechanism (62), the biasing means (74) is attached to the toggle plate support member (64). Accordingly, the urging means (74) also moves.

  A self-propelled crusher according to claim 2 of the present invention is characterized in that the jaw crusher (30) according to claim 1 is mounted.

According to the first aspect of the present invention, when the swing jaw is moved close to and away from the fixed jaw through the toggle plate support member and the toggle plate by the outlet gap adjusting mechanism, the outlet gap between the lower end of the fixed jaw and the swing jaw is formed. Adjusted. Thereby, the size of the crushed material can be adjusted, and the versatility of the jaw crusher is improved.
At this time, since the urging means of the toggle plate holding mechanism is attached to the toggle plate supporting member, when the toggle plate supporting member is moved by the outlet gap adjusting mechanism, the urging means of the toggle plate holding mechanism is moved accordingly. To do. Therefore, the urging force of the urging means on the toggle plate hardly changes and is kept almost constant regardless of the size of the exit gap, so there is no need to adjust this urging force when adjusting the exit gap. Clearance adjustment work becomes easy.

  According to the second aspect of the present invention, since the above-described jaw crusher is mounted, the toggle plate holding mechanism is disposed without increasing the overall height with the effects as described above. Therefore, such a jaw crusher is particularly suitable for mounting on a self-propelled crusher having a limited height during transportation. Furthermore, since the overall height can be kept low, the improvement of the loading property, the miniaturization and the weight reduction are promoted.

  The toggle plate holding mechanism has a tension link with one end attached to the swing jaw, a tension lever that supports the other end of the tension link, a tension rod with one end attached to the tension lever, and the tension rod in the axial direction. It is preferable that a tension spring to be urged is provided, and the swing centers on both sides of the tension link are provided in the vicinity of the swing centers on both sides of the toggle plate.

  In the jaw crusher having this configuration, the tension link also swings with the toggle plate when the swing jaw swings. At this time, since the swing center on both sides of the tension link is provided in the vicinity of the swing center on both sides of the toggle plate, the swing operation of the tension link approximates the swing operation of the toggle plate. That is, the tension link swings around the vicinity of the swing center on the tension lever side, and the position of the link lever hardly changes. Therefore, the urging force of the tension spring hardly changes and the urging force during swinging of the swing jaw is stabilized.

  The toggle plate holding mechanism includes a tension link whose one end is attached to the swing jaw, a tension lever that supports the other end of the tension link, a tension rod that is attached to the tension lever, and the tension rod in the axial direction. It is preferable that a tension spring to be urged is provided, and the swing center on both sides of the tension link and the swing center on both sides of the toggle plate are arranged at the same position in a side view.

  In the jaw crusher of this configuration, the swing center on both sides of the tension link and the swing center on both sides of the toggle plate are arranged at the same position in a side view, so that the toggle plate and the tension link are always kept in parallel, and the swing jaw The swinging motion of the toggle plate and the swinging motion of the tension link coincide with each other. That is, the tension link swings about the swing center of the toggle plate on the tension lever side, so that the position of the tension lever does not change at all. Therefore, the urging force of the tension spring does not change, the urging force during swinging of the swing jaw is constant, and a more stable crushing operation can be performed.

It is preferable that the tension link has a concave portion, and the toggle plate is provided with a notch at a position corresponding to the swing center on both sides of the tension link.
Since the toggle plate is usually provided over the entire width of the swing jaw, if the swing centers on both sides of the tension link are arranged in the same position in the vicinity of the swing center of the toggle plate or in a side view, there is a possibility of interference with the toggle plate. On the other hand, in the jaw crusher of the present invention, the tension link is formed in a shape having a recess, and the notch is provided at a position corresponding to the swing center on both sides of the tension link in the toggle plate. The toggle plate does not interfere with each other, and the swing center of the tension link is reliably and easily disposed at the same position in the vicinity of the swing center of the toggle plate or in the side view.

It is preferable that the toggle plate is divided into a plurality of parts at positions where the tension links are arranged.
Even in the jaw crusher of this configuration, the toggle plate is divided at the position where the tension link is arranged. It will be surely placed in position.

[Overview 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 the present embodiment, for convenience of explanation, the right side in FIG. 3 is the front side and the left side is the rear side.
The self-propelled crusher 1 may be arranged at a building demolition site or the like to be used for crushing concrete blocks or asphalt blocks. Used to coarsely crush natural stones to a predetermined particle size. For this reason, each dimension of full length, full width, and full height is large, and belongs to a large self-propelled crusher.

  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, The jaw crusher 30 mounted on the front side of the head unit 20, the power unit 40 mounted further on the front side of the jaw crusher 30, and the main body unit 10 below the pair of crawlers 18 extending obliquely forward and upward. It is comprised with the discharged | emitted conveyor 50 which took out.

  The main body unit 10 includes a main frame (track frame) 14 in which left and right side frames 12 provided continuously in the front-rear direction are connected by a plurality of connection frames 13 (FIG. 2). The lower traveling body 11 is attached to the 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 front hydraulic motor 15 and a rear idler 17.

  The supply unit 20 includes a rear frame 23 in which left and right side frames 21 protruding rearward are connected by a substantially rectangular connecting 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 the vibration device 25. A hopper 26 is provided on the upper portion of the grizzly feeder 24 so as to surround the three sides of the grizzly feeder 24, and raw materials are put into the hopper 26 that is expanded upward. In addition, a discharge chute 27 is provided below the grizzly feeder 24 to guide the raw material that has been sorted and dropped by the grizzly to the lower discharge conveyor 50. 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 total height of the supply unit 20 is reduced, and the transport restrictions on the trailer can be cleared.

  As shown in FIG. 6, the jaw crusher 30 includes a crusher frame 34 in which left and right side wall plates 31 are connected by a back wall plate 32 reinforced with a plurality of ribs and a cross member 33. A fixed jaw 35 is attached to the front side of the fixed jaw 35, and a swing jaw 36 having a tooth surface standing substantially vertically is disposed. The swing jaw 36 is suspended from an eccentric portion of a main shaft 37 that is rotatably mounted between the side wall plates 31, and a reaction force receiving link mechanism (reaction force) that receives a reaction force at the time of crushing on the lower side. Receiving mechanism) 60, and is always urged toward the reaction force receiving link mechanism 60 side by a tension link mechanism (toggle plate holding mechanism) 70.

  Here, the reaction force receiving link mechanism 60 supports the toggle plate 61 whose one end is locked to the back surface portion of the swing jaw 36, the other end side of the toggle plate 61, and rotates around the fixed link pin 63. A toggle link (toggle plate support member) 64 and a bare lock cylinder 65 whose lower end is pivotally supported by the toggle link 64 are generally configured, and this bear lock cylinder 65 is pivotally supported to the cross member 33 side (trunnion). Structure). Then, by moving the rod 66 of the bear lock cylinder 65 forward and backward, the outlet gap W between the lower ends of the jaws 35 and 36 can be adjusted. That is, the reaction force receiving link mechanism 60 is an exit clearance adjustment link mechanism (exit clearance adjustment mechanism) that moves the swing jaw 36 close to and away from the fixed jaw 35 via the toggle link 64 and the toggle plate 61 by driving the bear lock cylinder 65. 62.

  The tension link mechanism 70 is disposed substantially at the center of the reaction force receiving link mechanism 60, and is pivotally supported by a tension link 71 having one end pivotally supported on the swing jaw 36 side and the fixed link pin 63. The tension lever 72 that is supported, a tension rod 73 that is pivotally supported by the tension lever 72, and a tension spring (biasing means) 74 that urges the tension rod 73 in a predetermined direction are generally configured. A rod 73 and a tension spring 74 are attached to the toggle link 64 described above.

  In such a jaw crusher 30, when a pulley 38 provided at one end of the main shaft 37 is driven by a hydraulic motor 39 via a V-belt, the swing jaw 36 functions as a swing link by the rotation of the main shaft 37 and is fixed. The raw material is crushed with the jaw 35. At this time, in the jaw crusher 30 of the present embodiment, the reaction force receiving link mechanism 60 is an up-thrust type so that the swing jaw 36 swings away from the tooth surface of the fixed jaw 35 from above to below. Yes.

  The power unit 40 includes a base frame 42 in which left and right side frames 41 are connected by a plurality of connecting 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. Further, 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, and the hydraulic motor for driving the discharge conveyor 50, etc. It is accommodated in an accommodation space surrounded by the base frame 42.

  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 material discharged from here and crushed material dropped from the outlet of the jaw crusher 30 to the front. Drop from place to deposit. In addition, when foreign materials, such as a reinforcing bar and a metal piece, are contained as a raw material, it is also possible to attach a magnetic separator to the front part side of the discharge conveyor 50, and to remove this foreign material. In addition, the crushed material from the discharge conveyor 50 may not be deposited on the ground, but may be transported to a remote place using a secondary conveyor or a tertiary conveyor.

[Detailed description of jaw crusher]
Details of the jaw crusher 30 will be described below.
In FIG. 6, the jaw crusher 30 includes a fixed jaw 35 fixed to the back wall plate 32 as described above, and a swing jaw 36 that swings relative to the fixed jaw 35. A reaction force receiving link mechanism 60 that receives the reaction force of the swing jaw 36 and a tension link mechanism 70 that urges the swing jaw 36 toward the reaction force receiving link mechanism 60 with a predetermined urging force are provided on the back surface of the swing jaw 36. I have.

The reaction force receiving link mechanism 60 is configured by a link including the toggle plate 61, the toggle link 64, and the bear lock cylinder 65 as described above.
As shown in FIGS. 7 and 8, the toggle plate 61 is a plate-like member that is in contact with substantially the entire width of the back surface of the swing jaw 36, so that the reaction force receiving link mechanism 60 is an up thrust type. 36 is in contact with diagonally upward from below. One end of the toggle plate 61 is in contact with a contact portion 361 provided on the back surface of the swing jaw 36. Further, the other end of the toggle plate 61 is in contact with a contact portion 641 provided in the toggle link 64. Thus, the toggle plate 61 is sandwiched between the swing jaw 36 and the toggle link 64. Here, the abutting portions 361 and 641 are formed with concave portions 362 and 642 having a radius R (arrow in FIG. 7) having a substantially arc-shaped cross section, and the toggle plate 61 has arcs of the concave portions 362 and 642. The center is swingable with each swing center S2. Further, a notch 611 is formed in the center of the toggle plate 61 in the width direction on the side close to the toggle link 64.

Two toggle links 64 are provided in the vicinity of the inside of the side wall plate 31, and are connected by a connecting portion 643 that is integrally built between the toggle links 64. An attachment portion 644 to which the tension spring 74 is attached is integrally formed with the connection portion 643. Each of the toggle links 64 is pivotally supported by a fixed link pin 63, and two fixed link pins 63 are provided on the same axis inside the side wall plate 31. Further, the other end in the vicinity is fixed to a mounting plate 331 protruding downward from the cross member 33.
The above-described contact portions 641 are attached to the toggle links 64, and the end portions of the toggle plates 61 on both sides of the notch portions 611 are in contact with each other.

The bare lock cylinder 65 is provided on the front side of the two toggle links 64, and includes the rod 66 described above and a cylinder body 67 for moving the rod 66 forward and backward as shown in FIG. The bare lock cylinder 65 is erected so that the rod 66 is located below the cylinder body 67, and the lower end of the rod 66 is pivotally supported by the front end of the toggle link 64. In the cylinder body 67, the vicinity of the end portion on the side where the rod 66 advances and retreats, that is, the lower end side (head side) is rotatably supported by a support portion 68 having a trunnion structure. The support portion 68 includes a support shaft 681 that is integrally formed to protrude from both sides of the cylinder body 67 and a bearing portion (not shown) that rotatably supports the support shaft 681. Is supported by a side wall plate 31 and a mounting plate 332 provided at the other end so as to protrude from the cross member 33, so that the bear lock cylinder 65 is disposed at a position close to the side wall plate 31.
In such a bear lock cylinder 65, the rod 66 or the piston at the end of the rod 66 has an interference fit with the cylinder body 67, and both are normally locked. When hydraulic pressure is introduced into this interference fitting portion through the rod 66, the peripheral wall of the cylinder body 67 bulges outward, thereby reducing the resistance of both and releasing the lock, allowing the rod 66 to advance and retract relative to the cylinder body 67. It becomes. Therefore, the rod 66 can be locked at an arbitrary position inside the cylinder body 67.

  According to such a reaction force receiving link mechanism 60, the reaction force generated when the raw material is crushed is received by the fixed link pin 63 of the toggle link 64 and the support portion 68 of the bear lock cylinder 65 via the toggle plate 61. Become. Further, as described above, hydraulic pressure is introduced between the piston of the bear lock cylinder 65 and the cylinder body 67 to release the lock, and if the rod 66 is advanced and retracted in this state, the toggle link 64 and the toggle plate 61 are used. The swing jaw 36 moves to approach and separate from the fixed jaw 35. That is, the reaction force receiving link mechanism 60 also serves as the outlet clearance adjusting link mechanism 62.

  As shown in FIGS. 7 and 8, the tension link mechanism 70 is provided between the two toggle links 64 at the approximate center in the width direction of the swing jaw 36. As described above, the tension link mechanism 70 is a link mechanism including the tension link 71, the tension lever 72, the tension rod 73, and the tension spring 74.

The tension link 71 is substantially L-shaped, and one end is pivotally supported on the rotation center shaft 711 of the mounting portion 363 provided on the swing jaw 36, and the other end is pivotally supported on the rotation center shaft 712 of the tension lever 72. Thus, it is possible to oscillate with the approximate center of these rotation center shafts 711 and 712 as the oscillation center S1. The side near the tension lever 72 at the end of the tension link 71 is disposed inside the notch 611 of the toggle plate 61 so as not to interfere with the toggle plate 61.
Here, the swing center S <b> 1 is provided in the vicinity of the swing center S <b> 2 of the toggle plate 61, and the tension link 71 performs a swing operation similar to the swing operation of the toggle plate 61.

  The tension lever 72 includes a shaft portion 721 that is rotatably supported by the fixed link pin 63, and a lever portion 722 that rotates about the shaft portion 721. The shaft portion 721 is formed in a cylindrical shape, and both ends thereof are supported between the end portions on the side where the fixed link pins 63 are close to each other. Further, a pair of lever portions 722 are provided vertically below the shaft portion 721, the above-described tension link 71 is provided on the rear side of the lower end side of the lever portion 722, and the end portion of the tension rod 73 is provided on the front side. It is attached.

  The tension rod 73 passes through the attachment portion 644 of the toggle link 64 and is disposed obliquely forward and upward from the attachment portion of the tension lever 72. The tension rod 73 is inserted into a tension spring 74, and the tension spring 74 abuts on a contact portion 731 screwed into the tension rod 73 and a base end fixed to the attachment portion 644. By abutting against the contact portion 732, the tension rod 73 is urged against the toggle link 64 with a predetermined urging force (tensile force). That is, the tension spring 74 urges the swing jaw 36 toward the toggle link 64 via the tension rod 73, the tension lever 72, and the tension link 71. By this urging force, the toggle plate 61 is reliably held between the swing jaw 36 and the toggle link 64.

[Operation of jaw crusher]
The operation of the jaw crusher 30 will be described below.
First, when the pulley 38 is rotated via the V-belt by driving the hydraulic motor 39 and the main shaft 37 is rotated, the swing jaw 36 pivotally supported by the eccentric portion of the main shaft 37 swings. At this time, since the lower side of the swing jaw 36 is supported by the up-thrust type reaction force receiving link mechanism 60, the swing of the toggle plate 61 about the swing center S2 on the toggle link 64 side causes the swing The jaw 36 swings so as to be close to and away from the fixed jaw. By this swinging motion, the swing jaw 36 and the fixed jaw 35 crush the raw material put between them, and discharge the crushed material from the exit gap W between the lower ends to the discharge conveyor 50.

  The reaction force received when the swing jaw 36 crushes the raw material is received by the fixed link pin 63 of the toggle link 64 and the support portion 68 of the bear lock cylinder 65 via the toggle plate 61. Further, when the reaction force received by the swing jaw 36 is excessive, the interference lock portion of the bear lock cylinder 65 slides to prevent the toggle link 64 and the bear lock cylinder 65 from being damaged.

  On the other hand, when changing the particle size of the crushed crushed material, the outlet clearance adjusting link mechanism 62 is operated. Oil pressure is introduced between the piston of the bare lock cylinder 65 and the cylinder main body 67 to slightly expand the cylinder main body 67 to reduce the resistance of both, and to release the lock due to the interference fit. In this state, when hydraulic pressure is introduced to the head side or the bottom side of the cylinder body 67 and the rod 66 is advanced and retracted, the toggle link 64 rotates around the fixed link pin 63 accordingly. Then, the toggle plate 61 moves and the swing jaw 36 approaches and separates from the fixed jaw 35. Thus, the outlet gap W between the lower ends of the swing jaw 36 and the fixed jaw 35 is adjusted, and the particle size of the crushed material is reduced. change.

  At this time, in the tension link mechanism 70, as the swing jaw 36 approaches and separates, the tension link 71 also moves and the tension lever 72 rotates. At this time, each swing center S1 of the tension link 71 is in the vicinity of each swing center S2 of the toggle plate 61, and the rotation center of the tension lever 72 and the toggle link 64 is a common fixed link pin 63. Therefore, the movement trajectory of the tension link 71 approximates the movement trajectory of the toggle plate 61. Accordingly, the tension lever 72 rotates about the same angle as the rotation angle of the toggle link 64. As a result, the tension lever 72 is fixed to the contact portion 731 of the tension rod 73 attached to the tension lever 72 and the attachment portion 644 of the toggle link 64. The relative position with respect to the abutting portion 732 hardly changes, and even if the exit gap W is changed, the urging force of the tension spring 74 becomes substantially constant.

According to this embodiment, the following effects can be obtained.
(1) Since the tension link mechanism 70 forms a link including the tension link 71, the tension lever 72, the tension rod 73, and the tension spring 74, the arrangement angle of the tension link 71 and the tension rod 73 in the tension lever 72 is changed. It can be changed, and the degree of freedom of arrangement in the height direction can be improved. Accordingly, the tension rod 73 can be disposed obliquely upward toward the front, and unlike the conventional case, the tension rod 73 and the tension spring 74 do not protrude toward the discharge conveyor 50 below the swing jaw 36, and the crushed material can be discharged well.
On the other hand, even with the jaw crusher 30 provided with the up-thrust type reaction force receiving link mechanism 60, the tension link mechanism 70 can be arranged without increasing the overall height, and this jaw crusher 30 is mounted on the self-propelled crusher 1. However, the vehicle height limit can be cleared reliably.

(2) When the tension spring 74 is held between the tip end of the tension rod 73 and the mounting portion 644 of the toggle link 64 by the contact portions 731 and 732, the toggle link 64 rotates to adjust the exit clearance. When the swing jaw 36 moves, the contact portion 732 also moves. At this time, the tension rod 73 also moves together via the tension link 71 and the tension lever 72, so that the urging force of the tension spring 74 hardly changes. Therefore, it is not necessary to reset the urging force of the tension spring 74 when adjusting the outlet gap, and the outlet gap can be adjusted easily and in a short time.

(3) When the swing jaw 36 swings, the toggle plate 61 swings about the swing center S2 on the toggle link 64 side. At this time, since the swing center S1 of the tension link 71 is disposed in the vicinity of the swing center S2 on both sides of the toggle plate 61, the swing operation of the toggle plate 61 and the swing operation of the tension link 71 are approximated. That is, the tension link 71 swings around the vicinity of the swing center S1 on the tension lever 72 side, and the position of the tension lever 72 hardly changes. Therefore, the tension spring 74 hardly expands and contracts even during swinging of the swing jaw 36, and a stable urging force can be obtained.

It should be noted that the present invention is not limited to the above-described embodiments, and modifications, improvements, and the like within the scope that can achieve the object of the present invention are included in the present invention.
For example, the swing center S1 of the tension link 71 is disposed in the vicinity of the swing center S2 on both sides of the toggle plate 61. However, the present invention is not limited to this, and for example, as shown in FIGS. You may arrange | position to the rocking | swiveling center S2 of both sides of the toggle plate 61 at the same position by side view. 9 and 10, the tension link 71 is linearly formed in the longitudinal direction, and is disposed at the approximate center in the width direction of the swing jaw 36. The toggle plate 61 is divided into two at the approximate center where the tension link 71 is disposed, and the toggle plate 61 is sandwiched between the contact portions 361 and 641.
According to such a configuration, since the swing center S1 of the tension link 71 can be disposed at the same position as the swing center S2 of the toggle plate 61 in a side view, the tension link 71 is moved by the toggle plate 61 when the swing jaw 36 swings. This is the same as the swinging motion. Therefore, when the swing jaw 36 swings, the tension link 71 swings about the swing center S1 on the tension lever 72 side, the tension lever 72 does not rotate at all, and the urging force of the tension spring 74 does not change at all. A more stable urging force can be obtained.
Note that the number of divisions of the toggle plate 61 is not limited to two, and may be divided into a plurality of divisions according to the number of tension link mechanisms 70 arranged.

  Alternatively, as shown in FIGS. 11 and 12, notches 611 may be provided on both sides of the toggle plate 61, and both ends of the tension link 71 may be disposed inside these notches 611. 11 and 12, notch portions 611 are provided at substantially the center in the width direction at both ends of the toggle plate 61, and both ends of the tension link 71 having a recess shape in a side view are disposed inside these notch portions 611. Yes. At the end of the tension link 71, the swing center S1 on the swing jaw 36 side is disposed at the same position as the swing center S2 of the toggle plate 61 in a side view, and the swing center S1 on the tension lever 72 side is the swing center of the toggle plate 61. It is arranged in the vicinity of the moving center S2. According to such a configuration, the swing center S1 can be disposed in the vicinity of the swing center S2 of the toggle plate 61 or at the same position as the swing center S2 in a side view without interfering with the toggle plate 61 at both ends of the tension link 71. The urging force of the tension spring 74 can be stabilized. Further, according to this configuration, by providing the notch 611 in the toggle plate 61, the swing jaw 36 can be supported over the entire width by the single toggle plate 61, so that the toggle plate 61 can be reduced by a long period of use. Etc. can be prevented well, and the durability of the toggle plate 61 can be improved.

  As for the position of the swing center S1, both of them may be arranged in the vicinity of the swing center S2 of the toggle plate 61 in the configuration of FIGS. 9 and 10, or one of them is arranged in the vicinity of the swing center S2. May be. 11 and 12, both of the swing centers S1 may be in the vicinity of the swing center S2, may be at the same position as the swing center S2 in a side view, and moreover, in contrast to the illustrated swing center. It may be disposed in the vicinity of S2 or at the same position as the swing center S2 in a side view.

Although the tension link mechanism 70 is provided at the approximate center in the width direction of the swing jaw 36, the tension link mechanism 70 is not limited thereto, and a pair of tension link mechanisms 70 may be provided on both sides of the toggle plate 61 as shown in FIGS. 13 and 14. In FIG. 13 and FIG. 14, the toggle links 64 are arranged close to each other and are connected to each other by a cylindrical connecting portion 643. The toggle link 64 is fixed to the rotation link pin 69, whereby the rotation link pin 69 rotates together with the toggle link 64. The pivot link pins 69 are rotatably supported by attachment portions 333 provided so that their substantially centers protrude downward from the cross member 33.
The tension lever 72 is individually pivotally supported with respect to the pivot link pin 69, and the tension rod 73 is supported via a tension spring 74 on a mounting portion 644 that protrudes from the toggle link 64. .
The bear lock cylinder 65 is rotatably supported by a mounting portion 334 that protrudes upward from the cross member 33 on the side farther from the rod 66 of the cylinder body 67, that is, on the bottom side.

  Even in the jaw crusher having such a configuration, since the tension link mechanism 70 is configured by a link, the tension rod 73 and the tension spring 74 do not protrude toward the discharge conveyor 50 side, and a good discharge property is obtained. Further, when the rod 66 of the bear lock cylinder 65 is advanced and retracted, the toggle link 64 is rotated together with the rotation link pin 69, and the exit gap W of the swing jaw 36 and the fixed jaw 35 can be adjusted as in the above-described embodiment. At this time, since the tension spring 74 is attached to the toggle link 64, the urging force hardly changes even if the outlet clearance is adjusted, and the adjustment of the urging force is unnecessary, and the outlet clearance can be adjusted easily.

  Although the jaw crusher 30 of the present invention is mounted on the self-propelled crusher 1, the jaw crusher 30 is not limited to this and may be used as a stationary jaw crusher 30. Even in this case, the tension rod 73 and the tension spring 74 can be structured so as not to interfere with the discharge conveyor 50 without increasing the overall height, so that good discharge performance can be obtained.

Although the best configuration, method and the like for carrying out the present invention have been disclosed in the above description, the present invention is not limited to this. That is, the invention has been illustrated and described primarily with respect to particular embodiments, but may be configured for the above-described embodiments without departing from the scope and spirit of the invention. Various modifications can be made by those skilled in the art in terms of materials, quantity, and other detailed configurations.
Therefore, the description limited to the shape, material, etc. disclosed above is an example for easy understanding of the present invention, and does not limit the present invention. The description by the name of the member which remove | excluded the limitation of one part or all of such restrictions is included in this invention.

The front view which shows the self-propelled crusher in one Embodiment of this invention. The rear view which shows the said self-propelled crusher. The right view which shows the said self-propelled crusher. The left view which shows the said self-propelled crusher. The top view which shows the said self-propelled crusher. Sectional drawing which shows the jaw crusher of the said self-propelled crusher. The expanded sectional view which shows the toggle plate holding mechanism of the said jaw crusher. FIG. 3 is a plan sectional view showing a toggle plate holding mechanism of the jaw crusher. The expanded sectional view which shows the modification of the said toggle plate holding | maintenance mechanism. FIG. 6 is a plan sectional view showing a modification of the toggle plate holding mechanism. The expanded sectional view which shows another modification of the said toggle plate holding | maintenance mechanism. FIG. 10 is a plan sectional view showing another modification of the toggle plate holding mechanism. The expanded sectional view which shows another modification of the said toggle plate holding | maintenance mechanism. FIG. 10 is a plan sectional view showing still another modification of the toggle plate holding mechanism.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Self-propelled crusher, 30 ... Jaw crusher, 35 ... Fixed jaw, 36 ... Swing jaw, 60 ... Reaction force receiving link mechanism (reaction force receiving mechanism), 61 ... Toggle plate, 62 ... Link mechanism for exit clearance adjustment (Exit gap adjusting mechanism), 64... Toggle link (toggle plate support member), 70... Tension link mechanism (toggle plate holding mechanism), 74.

Claims (2)

In the jaw crusher (30)
A fixed jaw (35);
A swing jaw (36) swinging relative to the fixed jaw (35);
Up-thrust type comprising a toggle plate (61) whose one end is in contact with the swing jaw (36) and a toggle plate support member (64) where the other end of the toggle plate (61) is in contact Reaction force receiving mechanism (60),
A toggle plate holding mechanism (70) for holding the toggle plate (61) between the swing jaw (36) and the reaction force receiving mechanism (60);
The reaction force receiving mechanism (60) includes an outlet gap adjusting mechanism (for moving the swing jaw (36) close to and away from the fixed jaw (35) via the toggle plate support member (64) and the toggle plate (61). 62)
The toggle plate holding mechanism (70) includes urging means (74) for urging the swing jaw (36) and the toggle plate support member (64) against the toggle plate (61). The means (74) is attached to the toggle plate support member (64). When the toggle plate support member (64) is moved by the outlet gap adjusting mechanism (62), the biasing means (74) is also moved accordingly. Jaw crusher (30) characterized by moving. A self-propelled crusher (1), wherein the jaw crusher (30) according to claim 1 is mounted.

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