JP2007185567A - Jaw crusher - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To retain a toggle block in a smoothly advanceable/retreatable state by a simple and certain means. <P>SOLUTION: A hydraulic cylinder 8 is arranged at the back surface side of the toggle block 7 and a straight hole 7a directed in an advancement/retreating direction is formed on the back surface side of the toggle block 7. A piston rod 8a of the hydraulic cylinder 8 is inserted to the straight hole 7a and the toggle block 7 is advanceably/retreatably supported by the piston rod 8a at canti-lever. Thereby, it is not required that the toggle block 7 is advanceably/retreatably supported by an outer peripheral surface and the toggle block 7 can be simply and certainly retained in the smoothly advanceable/retreatable state without providing a dust-prevention means of a large scale. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a jaw crusher used for crushing rocks and ores.

  The jaw crusher used for crushing hard crushed objects such as rocks and ores is attached to a fixed tooth fixed to the frame and a swinging swing jaw, and a V-shaped that narrows the lower end exit between the fixed tooth It has a moving tooth that forms a crushing chamber with a cross section, and the other end of the toggle plate that supports the lower end of the swing jaw at one end is supported by a toggle block that can move forward and backward, and the moving tooth attached to the swing jaw is fixed The object to be crushed is moved to the tooth side, and the object to be crushed in the crushing chamber is bitten between the fixed tooth and the moving tooth for crushing.

  The toggle plate is abutted between the back surface of the lower end of the swing jaw and the toggle block via a cylindrical seat so as to follow the swinging swing jaw, and the toggle plate does not fall due to the swing of the swing jaw. As described above, the lower end of the swing jaw and the toggle block are connected by an elastic member. Moreover, the toggle block is supported so that the outer peripheral surface can be advanced and retracted, and the exit gap of the crushing chamber between the fixed tooth and the moving tooth can be adjusted (for example, refer to Patent Documents 1 and 2). In those described in Patent Documents 1 and 2, the outer peripheral surface of the toggle block is supported so as to be able to advance and retreat between the cradle provided on the frame (casing, machine frame) and the block presser. The support portion on the outer peripheral surface is lubricated with grease or the like. In addition, on the back side of the toggle block, a hydraulic cylinder that allows the toggle block to be retracted is disposed in order to eliminate foreign matter by widening the exit gap of the crushing chamber and to prevent overload caused by foreign matter biting.

JP-A-60-251941 (Fig. 1) Japanese Utility Model Publication No. 58-47948 (Fig. 2)

  In the conventional jaw crusher that supports the toggle block described above so as to be able to advance and retreat on its outer peripheral surface, dust generated by crushing the material to be crushed enters the support portion of the toggle block and enters the grease etc. for lubricating the support portion. In order to adjust the outlet gap of the crushing chamber, to remove foreign matter by widening this outlet gap, and to prevent overloading due to foreign matter biting, wear and surface damage to the support part when the toggle block is moved forward and backward Occurs, and the smooth advance / retreat of the toggle block is hindered. If the smooth advance / retreat of the toggle block is inhibited in this way, it causes various troubles such as breakage of the toggle plate and failure of crushing.

  In order to prevent dust from entering the support part of the toggle block, it is conceivable to seal the support part with dustproof means such as a dustproof cover, but the toggle block is a member having a wide width equivalent to the toggle plate, Since the cross-sectional area of the support portion on the outer peripheral surface is large, there is a problem that the dustproof means becomes large and it is difficult to ensure sufficient sealing performance.

  Accordingly, an object of the present invention is to hold the toggle block in a state in which the toggle block can be smoothly advanced and retracted by simple and reliable means.

  In order to solve the above-described problems, the present invention provides a crushing chamber having a V-shaped cross section, which is attached to a fixed tooth fixed to a frame and a swinging swing jaw, and a lower end side outlet narrows between the fixed tooth. A jaw crusher in which the other end of the toggle plate that supports the lower end side rear surface of the swing jaw at one end is supported by a toggle block that can be advanced and retracted, and a hydraulic cylinder is provided on the rear side of the toggle block. A straight hole is formed on the back side of the toggle block in the forward / backward direction, and the piston rod of the hydraulic cylinder is inserted into the straight hole, and the toggle block can be moved forward / backward with the piston rod of the hydraulic cylinder. Adopted a cantilevered configuration.

  That is, a hydraulic cylinder is arranged on the back side of the toggle block, a straight hole is formed on the back side of the toggle block in the forward / backward direction, and a piston rod of the hydraulic cylinder is inserted into the straight hole. By supporting the toggle block in a cantilevered manner with a piston rod so that it can move forward and backward, it becomes unnecessary to support the toggle block so that it can advance and retract on the outer peripheral surface. Added support for advancement / retreat.

  In the jaw crusher of the present invention, a hydraulic cylinder is disposed on the back side of the toggle block, a straight hole is formed on the back side of the toggle block in the forward / backward direction, and a piston rod of the hydraulic cylinder is inserted into the straight hole. In addition, since the toggle block is cantilevered by the piston rod of the hydraulic cylinder so as to be able to advance and retract, the toggle block can be easily and reliably held in a state where it can be smoothly advanced and retracted without providing a large dustproof means.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 to 4 show a first embodiment. As shown in FIGS. 1 and 2, this jaw crusher is attached to a fixed tooth 2 fixed to a front wall 1 a of a frame 1 and a swinging swing jaw 3, and a lower end side outlet between the fixed tooth 2. And a moving tooth 5 that forms a crushing chamber 4 having a V-shaped cross-section, and the other end of a toggle plate 6 that supports the lower end side rear surface of the swing jaw 3 at one end is supported by a toggle block 7 that can move forward and backward. By swinging the swing jaw 3 to which the moving tooth 5 is attached, the object to be crushed in the crushing chamber 4 is caught between the fixed tooth 2 and the moving tooth 5 and crushed. A hydraulic cylinder 8 that allows the toggle block 7 to be retracted is disposed on the back side of the toggle block 7, and the side walls 1b on both sides of the frame 1 are connected with the front wall 1a at the front end side and the pipe 1c at the rear end side. It is connected with.

  The swing jaw 3 is pivotally attached to the eccentric shaft 9a of the pulley 9 at the upper end side, and the toggle plate 6 that supports the lower back side of the swing jaw 3 via the cylindrical seat 10 so as to follow the swinging swing jaw 3. And a toggle block 7. Further, the lower end portion of the swing jaw 3 and the toggle block 6 are connected by a tension coil spring 11 so that the toggle plate 6 does not fall due to the swing of the swing jaw 3. Therefore, the upper end side of the swing jaw 3 pivotally attached to the eccentric shaft 9a draws a circular locus, and the lower end side supported by the toggle plate 6 performs an arc motion whose radius is the length of the toggle plate 6. A cover 12 is attached to the back side of the hydraulic cylinder 8, and a displacement sensor 13 for detecting the position of the piston rod 8 a of the hydraulic cylinder 8 is attached to the cover 12.

  As shown in FIGS. 3 (a) and 3 (b), the back side portion of the toggle block 7 has a circular cross section, and a straight hole 7a having a circular cross section is provided on the back surface thereof, and a hydraulic cylinder 8 is provided in the straight hole 7a. The piston rod 8a is inserted, and the toggle block 7 is cantilevered by the piston rod 8a so as to advance and retreat. The outlet gap of the crushing chamber 4 is adjusted by advancing or retracting the piston rod 8a covered with the toggle block 7, and after the outlet gap is adjusted, the piston rod 8a is held at a predetermined position. Then, when preventing overload due to foreign object biting, the piston rod 8a is retracted to widen the exit gap and eliminate foreign substances.

  Cylindrical dust-proof covers 14a and 14b that slide on each other are attached to the back side of the toggle block 7 and the front side of the bush 8b of the hydraulic cylinder 8 facing the toggle block 7, and the piston rod 8a is inserted directly. A space including the inlet portion of the hole 7a and the inlet portion of the hydraulic cylinder 8 through which the piston rod 8a enters and exits is sealed. Pressurized air is supplied to this space from an air supply pipe 15 provided in the bush 8b to prevent intrusion of dust from a sliding portion between the dustproof covers 14a and 14b.

  As shown in FIG. 4, ears 17 are provided on both sides of the hydraulic cylinder 8, and projecting members 18 attached to these ears 17 penetrate through the side walls 1 b on both sides of the frame 1. The hydraulic cylinder 8 is supported on both side walls 1b by being fitted into the holes 19. The overhanging member 18 includes a cylindrical portion 18a fitted into the through hole 19, a bottom portion 18b formed with a convex portion 20 fitted into a fitting hole 17a provided in the ear portion 17 of the hydraulic cylinder 8, and a side wall 1b. The bottom portion 18b is attached to the ear portion 17 and fixed by the positioning pins 21a and 21b, and the flange portion 18c is attached to the outside of the side wall 1b with a bolt.

  5 and 6 show a second embodiment. This jaw crusher has the same basic configuration as that of the first embodiment, and the hydraulic cylinder 8 is supported in parallel by two beam members 22 passed to both side walls 1b of the frame 1, The piston rods 8a of these hydraulic cylinders 8 are inserted into two straight holes 7a provided on the back surface of the toggle block 7, and the toggle block 7 is cantilevered by the two piston rods 8a. Although not shown, the back side portion of the toggle block 7 provided with two straight holes 7a has a rectangular cross section, and the straight holes 7a into which the piston rods 8a are inserted are the same as those in the first embodiment. The space including the inlet portion and the inlet portion of the hydraulic cylinder 8 through which each piston rod 8a enters and exits is sealed with sliding dust-proof covers 14a and 14b.

The longitudinal cross-sectional view which shows the jaw crusher of 1st Embodiment Sectional view along the line II-II in FIG. a is a sectional view showing an enlarged main part of FIG. 2, b is a sectional view taken along line IIIb-IIIb of a Sectional view along line IV-IV in FIG. A longitudinal sectional view showing a jaw crusher of a second embodiment Sectional view along line VI-VI in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Frame 1a Front wall 1b Side wall 1c Pipe 2 Fixed tooth 3 Swing jaw 4 Crushing chamber 5 Dynamic tooth 6 Toggle plate 7 Toggle block 7a Straight hole 8 Hydraulic cylinder 8a Piston rod 9 Pulley 9a Eccentric shaft 10 Cylindrical seat 11 Coil spring 12 Cover 13 Displacement sensors 14a and 14b Dustproof cover 15 Air supply pipe 17 Ear part 17a Fitting hole 18 Overhang member 18a Cylindrical part 18b Bottom part 18c Flange part 19 Through hole 20 Protruding part 21a, 21b Positioning pin 22 Beam member

Claims (1)

  A fixed tooth fixed to a frame, and a moving tooth that is attached to a swinging swing jaw and that forms a V-shaped cross-section crushing chamber between which the lower end side outlet narrows. In the jaw crusher that supports the other end of the toggle plate that supports the lower end side rear surface with one end with a toggle block that can be advanced and retracted, a hydraulic cylinder is disposed on the rear side of the toggle block, and the forward and backward movement of the toggle block A jaw crusher characterized in that a straight hole directed in a direction is formed, a piston rod of the hydraulic cylinder is inserted into the straight hole, and the toggle block is cantilevered and supported by the piston rod of the hydraulic cylinder. .

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