JP2945346B2 - Jaw crusher - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a jaw crusher for compressing and crushing an object to be processed by swingably suspending a swing jaw on a shaft transversely mounted on an upper portion between both side frames.

[0002]

2. Description of the Related Art Conventionally, a jaw crusher is configured as shown in FIGS. 6 and 7 which illustrate a single toggle type.
In the figure, reference numeral 41 denotes a frame. The frame 41 includes side frames 42 parallel to each other, a front frame 43 in which front ends (left ends in FIG. 6) of both side frames 42 are closed, and a rear end of both side frames 42. A connecting rod 44 having an upper portion connected thereto and a rear frame 45 having a lower rear end portion (the lower right end portion in FIG. 6) of both side frames 42 connected to each other are formed in a substantially square shape in plan view. An eccentric shaft 46 is rotatably mounted on the upper portion between the two side frames 42. The eccentric shaft 46 connects a pulley 47 attached to the shaft end and a motor to a belt (both not shown). It is provided so that it can be driven to rotate by interlocking via the. A swing jaw 49 that forms a crushing chamber 48 in cooperation with the both side frames 42 and the front frame 43 is swingably mounted on the eccentric shaft 46. The swing jaw 49 and the front frame 43 A pressing tooth 50 and a receiving tooth 51 are attached to compress and crush the workpiece. In front of the rear frame 45, a toggle block 52 is mounted via a tension block fixing bolt 54 via a set adjusting plate 53 for adjusting the exit gap (set) of the crushing chamber 48, while the toggle Both ends of the block 52 are attached to guide brackets 55 attached to the inside of the both side frames 42 via block fixing bolts 56 for lifting. A toggle plate 59 is interposed between the toggle sheet 58 on the rear surface of the lower end so as to draw an oval on the lower end side of the swing jaw 49. At the lower end of the swing jaw 49, the spring receiving portion 4 of the rear frame 45 is provided.
A spring for urging the lower end of the swing jaw 49 rearward is provided between a spring receiver 61 attached to the other end and the spring receiver 45a. 62 are mounted. FIG.
Numeral 63 denotes a hydraulic cylinder for moving the toggle block 52. The jaw crusher with the above configuration,
By the operation of the electric motor, the lower end side of the swing jaw 49 swings so as to draw an elliptical shape, thereby compressing and crushing the objects to be processed introduced into the crushing chamber 48 and discharging them as crushed products from the outlet of the crushing chamber 48. Things. When adjusting the outlet gap of the crushing chamber 48, after the tension and lifting block fixing bolts 54, 56 are loosened, the toggle block 52 is advanced by the hydraulic cylinder 63, and the set adjusting plate 53 is adjusted. And then tightening the block fixing bolts 54 and 56.

[0003]

However, the conventional jaw crusher requires a rear frame and a guide bracket for supporting and guiding the toggle block, so that the structure is complicated and the cost is increased. Further, since the toggle block is moved while being suspended from the guide bracket via the block fixing bolt, there is a problem that the movement of the toggle block cannot be performed smoothly. Accordingly, an object of the present invention is to provide a jaw crusher that can simplify the structure for supporting and guiding the toggle block and can smoothly move the toggle block.

[0004]

In order to solve the above-mentioned problems, a jaw crusher according to the present invention has a swing jaw swingably mounted on an axle suspended above an upper portion between both side frames so as to swing an object to be processed. In a jaw crusher for compressing and crushing, a base end of a toggle block is rotatably supported on a block support shaft laid between two side frames in parallel with an axis behind the swing jaw, and a lower end of the swing jaw and the toggle A toggle plate is interposed between the block and the position away from the base end, and windows are provided on both side frames at the rear of the tip of the toggle block, and the block is supported at the rear of the tip of the toggle block. Attach a load transmission rod parallel to the shaft, insert both ends of this load transmission rod into each window, and install a set adjustment plate between both ends of the load transmission rod and the rear peripheral surface of each window. Characterized in that was. It is preferable that a hydraulic cylinder that rotates a toggle block is interposed between the two side frames. Preferably, the hydraulic cylinder is of a bear lock type.

[0005]

Embodiments of the present invention will be described below with reference to the drawings. 1 and 2 are a side sectional view and a rear view with a part thereof omitted, showing a first embodiment of a single toggle type jaw crusher according to the present invention. In the figure, reference numeral 1 denotes a frame. The frame 1 includes side frames 2 parallel to each other, a front frame 3 in which front ends (left ends in FIG. 1) of both side frames 2 are closed, and a rear end of both side frames 2. It is formed in a substantially square shape in plan view by the connecting rod 4 connecting the upper parts. An eccentric shaft 5 is rotatably mounted on the upper portion between the two side frames 2, and the eccentric shaft 5 is connected to a pulley 6 attached to the shaft end thereof.
The motor and the electric motor are linked to each other via a belt (both not shown) to be rotatably driven. Eccentric shaft 5
A swing jaw 8 which forms a crushing chamber 7 in cooperation with the side frames 2 and the front frame 3 is swingably mounted on the front side of the swing jaw 8 and the inner surface of the front frame 3. A pressing tooth 9 and a receiving tooth 10 are attached to compress and crush the workpiece. Between the side frames 2 behind the swing jaw 8 (to the right in FIG. 1), the block support shaft 11 is provided with an eccentric shaft 5.
A toggle block 12 is rotatably supported on the block support shaft 11 via a base end thereof, and a rear surface of the base end (a right side surface in FIG. 1). ), A bare lock (trade name) type hydraulic cylinder 1 interposed between the bracket 13 and the connecting rod 4 protruding from
4 is provided so as to be rotatable and fixed in a required range. The bare-lock type hydraulic cylinder 14 is provided with a flexible tube having a high coefficient of friction so as to surround the piston rod in the cylinder of a normal hydraulic cylinder, and press-fitting the flexible tube to the piston rod by hydraulic pressure, thereby connecting the piston rod. It can be fixed at any position. A toggle seat 15 provided on the front surface (left side in FIG. 1) at a position away from the base end of the toggle block 12 and a toggle seat 16 provided on the rear surface of the lower end of the swing jaw 8 are provided. A toggle plate 17 is provided at the lower end of the swing jaw 8 to draw an ellipse.

On both side frames 2, there is provided a window 18 comprising a rectangular portion 18a inclined forward and downward and a semicircular portion 18b connected to the rear portion thereof, located behind the tip of the toggle block 12. . A semi-disk-shaped load receiving plate 19 is rotatably fitted to the semi-circular portion 18b of each of the windows 18 via the arc portion thereof, and the receiving plate moving attached to the outside of the side frame 2 is moved. The blocking member 20 allows the window 1
8 and the window 18 is prevented from moving toward the rectangular portion 18a. On the other hand, a load transmitting rod 21 parallel to the block support shaft 11 is attached to the rear surface of the tip of the toggle block 12. Both ends of the load transmitting rod 21
Each window 18 is loosely inserted into a rectangular portion 18a. A set adjusting plate 2 for adjusting an outlet gap of the crushing chamber 7 is provided between both ends of the load transmitting rod 21 and the linear portions of the load receiving plates 19.
2 are interposed. A spring support plate 23 is provided between the two side frames 2 below the toggle block 12. The spring support plate 23 has a plurality of tension members each having one end pivotally connected to the lower end of the swing jaw 8. The rod 24 is inserted. And each tension rod 2
Spring support 25 and spring support plate 23 attached to the other end of 4
Swinging jaw 8
A spring 26 for urging the lower end of the rearward is elastically mounted.
Each of the springs 26 is selected to have a low spring constant so that it is not necessary to adjust the change in the installation length of the spring accompanying the adjustment of the outlet gap.

In the jaw crusher having the above-described structure, the lower end side of the swing jaw 8 is swung by an operation of an electric motor so as to draw an ellipse, thereby sequentially compressing and crushing the workpieces such as rough stones introduced into the crushing chamber 7. Then, it is discharged as crushed product from the outlet of the crushing chamber 7. The crushing load generated in the swing jaw 8 due to the compression crushing of the object to be processed is:
From the swing jaw 8, the power is transmitted to the toggle block 12 via the toggle sheet 16, the toggle plate 17, and the toggle sheet 15, and received from the toggle block 12 via the block support shaft 11 by the side frame 2, while the load transmission rod is transmitted from the toggle block 12. 21, set adjustment plate 22
And the structure in which the side frame 2 receives the crushing load at four points of the side frame 2 via the load receiving plate 19. On the other hand, when adjusting the outlet gap of the crushing chamber 7, first, the fixing of the piston rod of the hydraulic cylinder 14 is released and extended, and the toggle block 12 is moved around the block support shaft 11 in FIG. By turning clockwise, the set adjusting plate 22 is formed by the both ends of the load transmitting rod 21 and the linear portions of the load receiving plates 19.
Release the pinch. Next, after the set adjusting plate 22 was inserted and removed, the piston rod of the hydraulic cylinder 14 was contracted, and the set adjusting plate 22 was clamped between the both ends of the load transmitting rod 21 and the linear portions of the load receiving plates 19. After that, the piston rod is fixed. The load receiving plate 19 rotates in accordance with the change in the fixed angle of the toggle block 12 due to the insertion and removal of the set adjusting plate 22, and the load receiving plate 19 always receives the crushing load from a direction perpendicular to the straight portion thereof. .

Therefore, according to the jaw crusher of the first embodiment, since the rear frame and the guide bracket are not required, the structure can be simplified, and the cost can be reduced. Also, toggle block 1
2 is rotated about the block support shaft 11, so that the toggle block 12 can be easily and smoothly moved at the time of adjusting the outlet gap. Further, since the toggle block 12 is fixed by the bare lock type hydraulic cylinder 14, the fixation and release of the toggle block 12 can be performed easily and in a short time, and the labor for maintenance and inspection can be reduced.

FIGS. 3 and 4 are side sectional views showing a second embodiment of a single toggle type jaw crusher according to the present invention, and a rear view with a part thereof omitted. In the jaw crusher, the tip of the toggle block 12 is located below the block support shaft 11 in the first embodiment, whereas the tip of the toggle block 27 is located on the block shaft 1.
1 is located above. Other configurations and operational effects are almost the same as those of the first embodiment.
The same reference numerals are given to the same components and the like, and the description is omitted.

FIG. 5 is a side sectional view showing a third embodiment of a single toggle type jaw crusher according to the present invention. This jaw crusher is different from that of the first and second embodiments in that the window 18 has a rectangular portion 18a and a semicircular portion 1 connected thereto.
8b, the window 28 has a substantially square shape with a downward slope drawn by two arcs of different diameters centered on the block support shaft 11 and two straight lines passing through their centers of curvature. It was done. Other configurations and operational effects are almost the same as those of the first embodiment. Therefore, the same constituent members and the like are denoted by the same reference numerals and description thereof is omitted.

In each of the above embodiments,
Although a single toggle type jaw crusher has been described, the present invention is not limited to this, but a double toggle type (brake type) in which two toggle plates are interposed between a swing jaw and a toggle block with a pitman interposed therebetween.
Of course, it can also be applied to the jaw crusher.
Further, the hydraulic cylinder 14 is not limited to the bare lock type, and may be a standard type sufficient to rotate the toggle block. In this case, bolts and the like for fixing the toggle block are required. Further, the window is not limited to a window having a square portion and a semi-circular portion or a substantially rectangular shape, but may have a circular, semi-circular or other shape.

[0012]

As described above, according to the jaw crusher of the present invention, since the rear frame and the guide bracket are not required, the structure can be simplified, and the cost can be reduced. In addition, since the toggle block is rotated around the block support shaft, the movement of the toggle block at the time of adjusting the outlet gap can be easily and smoothly performed. On the other hand, by making the hydraulic cylinder that rotates the toggle block a bear-lock type, the toggle block can be fixed thereby, so that the toggle block can be fixed and released easily and in a short time. In addition, labor and maintenance can be saved.

[Brief description of the drawings]

FIG. 1 is a side sectional view showing a first embodiment of a jaw crusher according to the present invention.

FIG. 2 is a rear view in which a part of the jaw crusher of FIG. 1 is omitted.

FIG. 3 is a side sectional view showing a jaw crusher according to a second embodiment of the present invention.

FIG. 4 is a rear view in which a part of the jaw crusher of FIG. 3 is omitted.

FIG. 5 is a side sectional view showing a third embodiment of the jaw crusher according to the present invention.

FIG. 6 is a side sectional view of a conventional jaw crusher.

FIG. 7 is a rear view of the jaw crusher shown in FIG. 7 with a part thereof omitted;

[Explanation of symbols]

 2 Side frame 5 Eccentric shaft 8 Swing jaw 11 Block support shaft 12 Toggle block 14 Hydraulic cylinder 17 Toggle plate 18 Window 21 Load transmission rod 22 Set adjustment plate 27 Toggle block 28 Window

Continuing from the front page (72) Inventor Hikaru Nakao 1780 Uetakano, Yachiyo-shi, Chiba Kawasaki Heavy Industries, Ltd.Yachiyo Plant (72) Inventor Kenji Komatsu 1780, Kamitakano, Yachiyo-shi, Chiba Kawasaki Heavy Industries Yachiyo Plant (56) References JP-A 57-145545 (JP, U) JP-A 63-141639 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) B02C 1/00-1 / 14

Claims (3)

(57) [Claims] 1. A jaw crusher for compressing and crushing an object to be processed by swingably suspending a swing jaw on an axis transversely mounted on an upper portion between both side frames, wherein both jaws are parallel to the axis behind the swing jaw. The base end of the toggle block is rotatably supported on a block support shaft suspended between the side frames, and a toggle plate is interposed between the lower end of the swing jaw and a position away from the base end of the toggle block. Windows are provided on both side frames behind the tip of the toggle block, and a load transmission rod parallel to the block support shaft is attached to the rear surface of the tip of the toggle block, and both ends of the load transmission rod are provided. A jaw crusher characterized in that a set adjusting plate is interposed between both ends of a load transmitting rod and a rear peripheral surface of each window by loosely inserting the rod into each window. 2. A jaw crusher according to claim 1, wherein a hydraulic cylinder for rotating a toggle block is interposed between said side frames. 3. The jaw crusher according to claim 2, wherein said hydraulic cylinder is of a bear lock type.