WO1997036683A1

WO1997036683A1 - Outlet clearance adjustment mechanism of jaw crusher

Info

Publication number: WO1997036683A1
Application number: PCT/JP1997/001045
Authority: WO
Inventors: Yukio Tamura; Motoki Kurohara; Ryoichi Togashi
Original assignee: Komatsu Ltd.
Priority date: 1996-03-29
Filing date: 1997-03-27
Publication date: 1997-10-09
Also published as: JP3133766B2

Abstract

An outlet clearance adjustment mechanism of a jaw crusher has a simple construction an yet ensures easy adjustment. A toggle block (3c) forms on a base side (3e) a protruding portion (3c4) whose upper surface has a downward slope, and a base (3e) forms a V-shaped open portion (3e1) having a shape matching that of the protruding portion (3c4) and making it possible to clamp the protruding portion (3c4) on the side of the toggle block (3c). A sim (3j) which can be freely set and removed is disposed between the downward slope of the toggle block (3c) and the base.

Description

Description Jaw crusher outlet clearance adjustment mechanism

TECHNICAL FIELD The present invention relates to an outlet gap adjusting mechanism of a crusher for freely changing the particle size of crushed particles. Background technology

The jaw crusher will be described with reference to the self-propelled crusher shown in FIG. The example machine has, for example, a hopper 1, a feeder 2, a jog crusher 3, a belt conveyor 4, and the like, and is capable of running on its own. The crushed material 5 such as concrete and rocks put into the hopper 1 is fed into the jaw crusher 3 from the upper end of the jaw crusher 3 by the feeder 2 in an appropriate amount and crushed. The product is discharged onto the belt conveyor 4 from the exit gap δ at the lower end of the washer 3 and becomes a product. The outlet gap adjusting mechanism of the jaw crusher 3 will be described in detail with reference to FIG. Note that the terminology used in the following description, such as up, down, left, right, front, rear, etc., is taken from the example machine. The left side of the example is the front side.

The jaw crusher 3 fixes the fixed jaw 3a, the swing jaw 3b facing the fixed jaw 3a, the toggle block 3c located on the back side of the swing jaw 3b, and the fixed jaw 3a. A base 3e that supports the eccentric crank 3d that is pivotally mounted on the upper end of the swinging jaw 3b, and that adjustably fixes the position of the toggle opening 3c (the airframe of the example machine) ), One end of which contacts a first contact portion 3b1 provided on the back surface of the swing joint 3b, and a second contact portion 3c provided on the side of the toggle block 3c on the swing jaw 3b. A toggle plate 3 f having the other end in contact with 1, and a swing joint 1 3 in order to contact both ends of the toggle plate 3 f with the first contact portion 3 bi and the second contact portion 3 c 1. It is installed between the back of b and the base 3e side, and these swing And a pre-tension member 3 g having a tension for pulling the 3 e side together.

Here, the distance between the fixed jaw 3a and the swing jaw 3b gradually narrows from the opening at the upper end to the outlet gap 5 at the lower end. Therefore, when the swing shaft 3d is rotated to swing the swing joint 3b, the crushed material 5 introduced between the fixed jaw 3a and the swing jaw 3b is crushed and descends. And is discharged from the outlet gap δ. That is, by adjusting the position of the toggle block 3c fixed to the base 3e in the front-rear direction X (that is, by adjusting the exit gap <5), the particle size of the crushed particles can be freely changed. . Details are as follows.

The toggle bracket 3c has a male screw 3h and a double nut 3h 1 with respect to the first bracket 3e2 fixed above the toggle 3c and fixed to the base 3e. And suspended by. That is, the first bracket 3 e 2 has a long hole extending in the front-rear direction X and extending in the vertical direction Z. The male screw 3h passes through this slot and is screwed to the top of the toggle port 3c. The double nut 3h1 is screwed on the head side of the male screw 3h (upper side of the first bracket 3e2), and the lower surface of the double nut 3h1 is in contact with the upper surface of the first bracket 3e2, thereby forming the toggle block 3c. Is suspended from the first bracket 3 e 2 to prevent the toggle opening 3 c from dropping from the first bracket 3 e 2 (that is, from the base 3 e). Further, the toggle block 3c is provided with the male screw 3i, the shim 3j, and the double nut with respect to the second bracket 3e3 fixed to the base 3e behind the toggle block 3c. 3 i 1 and fixed. That is, the second bracket 3e3 has a hole in the front-back direction X. The external thread 3 i passes through this hole and is screwed to the rear of the toggle block 3c. The double nut 3 i 1 is screwed on the head side (the rear side of the second bracket 3 e 3) of the male screw 3 i, and its front surface contacts the rear surface of the second bracket 3 e 3. The glue block 3c is fixedly mounted on the second bracket 3e3 (that is, on the base 3e). The shim 3j is detachably sandwiched between the toggle block 3c and the second bracket 3e3. Therefore, to adjust the exit gap δ, first loosen the double nuts 3h1, 3i1 and the male screws 3h, 3i, and move the toggle block 3c in the vertical direction Z and the front-back direction X. Noh. Then, the toggle block 3c is moved in the front-rear direction X by a hydraulic cylinder (not shown) separately provided between the rear portion of the toggle block 3c and the base 3e. Stop. Then, a shim 3j having a predetermined thickness is put in and out between the toggle opening 3c and the second bracket 3e3. When the toggle port 3c is moved in the front-rear direction X by the hydraulic cylinder and the toggle port 3c stops, tighten the male screws 3h and 3i by a predetermined amount. Tighten the toggle block 3c completely, and then tighten the double nuts 3h1 and 3i1 to secure the position where the toggle block 3c is fixed to the base 3e. In other words, since the swing jaw 3b is provided from the toggle opening 3c to the toggle plate 3f via the toggle plate 3f, it moves in the forward and backward direction X by the amount of the insertion and removal of the shim 3j, thereby adjusting the exit clearance δ. Is done.

As described above, between the lower back surface of the swing joint 3b and the lower portion of the base 3e, both ends of the toggle plate 3f are connected to the first contact portion 3b1 and the second contact portion 3b. A pre-tension member 3 g that preliminarily applies tension to be drawn in contact with c 1 is installed. Therefore, the adjustment of the exit gap <5 is preferably performed with the pretension removed, and the adjustment of the exit gap <5 (that is, the insertion and removal of the shim 3 j) is performed subsequently. Correspondingly, it is necessary to readjust the pretension of 3 g of the pretension member. If this re-adjustment is not performed, the swing 3b will not be able to swing smoothly. Therefore, the pretensioning member 3 g is composed of a rod 3 g 1 having one end connected to the lower back surface of the swing jaw 3 b, a screw portion 3 g 2 provided at the other end of the rod 31, and a base 3. e, and a spring 3g3 that abuts both ends on the lower portion of e and the screw portion 3g2. That is, when adjusting the outlet gap 5 of the jaw crusher 3, the pretension is removed by turning the screw 3g2, and the pretension is reset according to the adjusted outlet gap δ. Become.

However, in the conventional jaw crusher outlet gap adjusting mechanism, when adjusting the outlet gap 5, the double nuts 3h1 and 3i1 are manually operated in addition to the operation of driving the hydraulic cylinder (not shown). However, it is necessary to turn both male screws 3h, 3i and the screw part 3g2 respectively, which is very troublesome. In addition, a pre-tensioning member 3 g spring 3 g 3 tension Since the swing is used to fix the swing to the base 3e even when the swing 13b swings, the tension becomes extremely large (specifically, several tons). Manually adjusting such a large tension to an optimum value each time the outlet clearance is adjusted is extremely laborious for the operator. In addition, it is necessary to secure a large working space for large tools in the jow crusher 3. This hinders the compactness of the example machine and the jaw crusher 3. Disclosure of the invention

SUMMARY OF THE INVENTION The present invention has been made in order to solve the problems of the prior art, and has as its object to provide an outlet gap adjusting mechanism of a simple yoke crusher having a simple structure that can be easily adjusted. First, the outlet clearance adjustment mechanism

A fixed jaw, a swing jaw facing the fixed jaw, a toggle hook located on the back side of the swing jaw, and a crank for fixing the fixed jaw and attaching the upper end of the swing jaw to the vehicle. One end abuts the base that supports the shaft and adjusts the position of the toggle block so that it can be adjusted, and one end of the first abutment on the back of the swing jaw, and attaches it to the swing jaw side of the toggle block. A toggle plate having the other end in contact with the second contact portion provided, and a back surface of the swing jaw to contact both ends of the toggle plate with the first contact portion and the second contact portion. A swinging jaw and a pre-tension member having a tension for pulling the swinging jaw and the base side together are provided between the swinging jaw and the base side, and the swinging pong is rotated by rotating the crank pong; The fixed job The crushed material input from between the upper end of the swing joint and the upper end of the swing joint is crushed. In the discharge gap adjustment mechanism of the joke crusher that adjusts the exit gap by adjusting the position of the toggle block when discharging

The toggle block forms a protruding part whose upper surface is a downward slope on the base side. On the toggle block side, the base has a V-shaped opening that has a shape that matches the protrusion and allows the protrusion to be sandwiched.

It is characterized by having a shim that can be freely inserted and removed between the down slope of the toggle block and the base.

According to the first configuration, on the base side, there is provided a toggle block having a projecting portion whose upper surface is a downward slope, and this toggle block side has a shape matching the projecting portion and sandwiches the projecting portion. By providing a base with a V-shaped opening to enable the power, the weight of the swing and the reaction force at the time of crushing are strong, and the toggle block is pushed backward through the toggle plate to toggle the block. Touch the hook to the shim or base. For this reason, it is possible to prevent upward and downward movement of the toggle port and forward and backward movement without using a conventional screw (for example, 3h and 3i in FIG. 18). In other words, it is possible to eliminate the manual adjustment work of the conventional male screw and to provide a jaw crusher outlet clearance adjustment mechanism having a simple structure that can be easily adjusted.

Secondly, in the jaw crusher outlet gap adjusting mechanism of the first configuration, the pretension member is installed between the back surface of the swing jaw and the toggle port, and the weight of the toggle port is its own weight. Moment around the second abutment based on the tension of the pre-tension member that pulls the back of the swinging jaw and the toggle opening into contact with the moment M0 around the second abutment It is characterized in that M s is erected so as to satisfy the relationship of “M o + M s> 0” with “M o> 0”.

Such a second configuration is based on the first configuration. Therefore, the function and effect of the first configuration are maintained as they are. In addition, both moments Mo and Ms satisfy “Mo + Ms> 0” as “Mo> 0”. For this reason, the lower surface of the toggle block is always grounded to the upper surface of the V-shaped opening of the base. Therefore, even if the toggle block vibrates due to the inertia force of the swing, the direction of the vibration is simplified. That is, for example, various means for fixing the toggle block to the base can be simplified and reduced in size. For example, the contact surface between the toggle hook and the base is worn by vibration, but this wear is also in the simple mode, and in anticipation of this, for example, the shape of the surface-hardened shim is improved. It will be easier.

Thirdly, in the outlet gap adjusting mechanism of the jaw crusher of the second configuration, the toggle block is characterized in that the toggle block is fixed to the base via male screws via shims.

The third configuration is based on the first and second configurations. Therefore, the effects of the first and second configurations are provided as they are. That is, according to the third configuration, the fracture resistance of the male screw is improved, and design of the gym shape and strength can be easily set. Therefore, it is easy to prevent accidental failure.

Fourth, in the outlet gap adjusting mechanism of the first configuration of the jaw crusher, the pre-tension member (3g) is installed between the back surface of the swing jaw and the toggle block, and the toggle block is provided. A hydraulic cylinder installed between the hydraulic cylinder and the base, and an accumulator provided in a circuit of the hydraulic cylinder that moves the toggle port toward the base in the pressure circuit. It is characterized by

Such a fourth configuration is based on the first configuration. Therefore, the effect of the first configuration is maintained as it is. In addition, the following effects are obtained. The conventional pretension member is installed between the lower back surface of the swing joint and the base. For this reason, every time the outlet clearance is adjusted, it is necessary to loosen or re-adjust the pre-tension of the pre-tension member. However, according to the fourth configuration, it is possible to adjust the outlet gap of the joo crusher without touching the pretension member. That is, adjustment of the pretension member is not required. In other words, the conventional hard work can be eliminated.

Further, conventionally, the hydraulic cylinder used only for adjusting the outlet gap of the jok crusher can be replaced with a conventional male screw (for example, 3i in FIG. 18). That is, in the fourth configuration, as described above, the toggle port and the base abut on the protruding portion and the V-shaped opening. Therefore, the toggle block cannot move further back. When the crusher is in operation, the toggle block may rattle against the base (or shim) due to the inertia of the swing. In other words, in the fourth configuration, the hydraulic cylinder that was used only when adjusting the outlet gap of the crusher was replaced with a conventional male screw. In addition, it is also used to prevent the jaw crusher from catching up when the jaw crusher is in operation. In addition, since it is a fluid pressure cylinder, an accumulator is also provided to completely prevent the toggle block from sticking. Since the pretensioning member is installed between the back of the swing jaw and the toggle block, it is not related to the expansion and contraction of the fluid pressure cylinder, and the effect of the first configuration is reduced. There is no. Fifth, in the outlet gap adjusting mechanism of the fourth configuration, the internal pressure of the accumulator is detected, and when the detected internal pressure has decreased to the first predetermined pressure, for a predetermined period after the decrease, Or a control means for automatically supplying a fluid pressure to a circuit in which the accumulator is provided until the pressure is increased to the second predetermined pressure from the time of the decrease.

The fifth configuration is based on the first and fourth configurations. Therefore, the effects of the first and fourth configurations are provided as they are. Furthermore, because of the fluid pressure cylinder, it is possible to perform automatic control taking into account the special features of the accumulator to completely prevent the toggle block from rattling. That is, according to the fifth configuration, the adjustment of the outlet gap of the joe crusher is almost completely automated except for the insertion and removal of the shim. BRIEF DESCRIPTION OF THE FIGURES

FIG. 1 is a side view at the time of adjusting a narrow exit gap according to the first embodiment of the present invention.

FIG. 2 is a side view at the time of adjusting a wide outlet gap according to the first embodiment of the present invention.

FIG. 3 is a plan view of the fixed portion of the toggle port according to the first embodiment of the present invention. FIG. 4 is a plan view of the shim according to the first embodiment of the present invention.

FIG. 5 is a hydraulic circuit diagram according to the first embodiment of the present invention.

FIG. 6 is another hydraulic circuit diagram according to the first embodiment of the present invention.

Fig. 7 is a diagram showing the direction of the toggle plate in Fig. 1.

FIG. 8 is a diagram showing the orientation of the toggle plate of FIG.

FIG. 9 is a side view according to the second embodiment of the present invention.

FIG. 10 is a plan view of a toggle-gate fixing portion according to a second embodiment of the present invention. FIG. I1 is a side view of a second embodiment of the present invention when a single-acting syndae is contracted.

FIG. 12 is a side view of the second embodiment of the present invention when a single-acting cylinder is extended.

FIG. 13 is a side view of a double-acting cylin- ders according to a second embodiment of the present invention at the time of contraction.

FIG. 14 is a side view of the double-acting cylinder according to the second embodiment of the present invention when it is extended.

FIG. 5 is a side view of the todal block according to the second embodiment of the present invention.

FIG. 16 is a side view of a toggle hook according to the second embodiment of the present invention.

Figure 17 is a side view of a conventional self-propelled crusher.

Figure 18 is a side view of a conventional jaw crusher. BEST MODE FOR CARRYING OUT THE INVENTION

Preferred embodiments of the present invention are described in detail below.

A first embodiment will be described with reference to FIGS. An example machine equipped with the first embodiment is a self-propelled crusher shown in FIG. Therefore, the same members as those in FIGS. 17 and 18 are denoted by the same reference numerals, and redundant description will be omitted.

As shown in FIGS. 1 and 2, the jaw crusher 3 is located on the back side of the fixed jaw 3a, the swinging jaw 3b facing the fixed jaw 3a, and the swinging jaw 3b. It has a toggle block 3c. In addition, fix the fixing jaw 3a, support the crank shaft 3d, which is attached to the upper end of the swing joint 3b, and fix the position of the toggle hook 3c so that it can be adjusted freely. It has a base 3e. Further, one end of the first contact portion 3b1 provided on the back surface of the swing jaw 3b is brought into contact with the second contact portion 3b provided on the side of the swing joint 13b of the toggle hook 3c. It has a toggle plate 3f that abuts the other end on c1. Further, in order to abut both ends of the toggle plate 3f with the first contact portion 3b1 and the second contact portion 3c1, the back of the swing joint 13b and the toggle block 3 It has two left and right pretension members 3 g and 3 g erected between it and the side surface of c.

The left and right two pre-tension members 3 g and 3 g are rods 3 gl with one end pin-connected to the back of the swing joint 13 b, as shown in detail in FIGS. 1 and 3. And this mouth The screw part 3 g 2 screwed to the other end of the head 3 g 1, the bracket 3 c 2 fixed to the side surface (that is, each of the right and left sides) of the toggle box 3 c, The cylindrical member 3c3 in the front-rear direction X fixed to the bracket 3c2, and the panel 3g3, whose front and rear ends are in contact with the rear surface of the cylindrical member 3c3 and the front surface of the screw portion 3g2, Have. That is, by turning the screw 3 g 2, the pre-tension corresponding to the outlet gap 5 can be freely secured with respect to the spring 3 g 3.

As shown in FIGS. 1 to 3, the toggle block 3c has a protruding portion 3c4 having a downward slope on the base 3e side (a protruding portion 3c4 having a V-shaped cross section as shown in the drawing). ). On the other hand, the base 3 e has, on the toggle block 3 c side, a V-shaped opening 3 having a shape matching the projection 3 c 4 and capable of sandwiching the projection 3 c 4. has e 1. And, between the down slope of the toggle opening 3c and the base 3e, there is provided a shim 3j which can be freely moved in and out as shown in FIG.

Further, between the toggle block 3c and the base 3e, both ends of the left and right two hydraulic cylinders 3k are pin-connected, as shown in FIGS. One of the front and rear pin connection parts is connected by a horizontal pin as shown in the figure (in the figure, the pin connection part on the base 3e side), and the outlet clearance (when adjusting 5 and when the jig washer 3 During operation, the hydraulic cylinder 3 k can be swung up and down smoothly.The hydraulic circuit of these hydraulic cylinders 3 k is, as shown in FIG. An electromagnetic switching valve 3k2 for interrupting or switching the pressure oil from the source 3k1 to the hydraulic cylinder 3k, and a controller (control means) for providing a switching signal S2 to the electromagnetic switching valve 3k2 3 k 3 and a switching switch 3 k 4 for giving the switching signal S 1 to the controller 3 k 3 by the operator of the example machine.

The solenoid-operated directional control valve 3 k 2 has an A 1 position to send pressure oil to the head side of the hydraulic cylinder 3 k, an A 2 position to send pressure oil to the bottom side, and a flow to the hydraulic cylinder 3 k. A three-position switching valve having an A o position (ie, a neutral position) that shuts off the road.

When the operator sets the switching switch 3k4 to the B1 position, the controller 3k3 receives the signal S1 and changes the signal S2 for setting the electromagnetic switching valve 3k2 to the A1 position. Input to valve 3k2. On the other hand, when the operator switches the switching switch 3k4 to the B2 position, the controller 3k3 receives the signal S] and sets the signal S to set the electromagnetic switching valve 3k2 to the A2 position. 2 is input to the solenoid-operated switching valve 3 k 2. When the operator sets the switching switch 3k4 to the B0 position, the controller 3k3 receives the signal S1 and switches the electromagnetic switching valve 3k2 to the A0 position to change the signal S2 to the electromagnetic switching position. Input to valve 3k2. When the solenoid operated directional control valve 3k2 is in the A1 position, as shown in Fig. 5, the hydraulic cylinder 3k contracts and the toggle block 3c is mounted on the base 3e (or the base via the shim 3j). 3 Make strong contact with e). Conversely, when the solenoid-operated directional control valve 3k2 is in the A2 position, the hydraulic cylinder 3k is extended and the toggle port 3c is separated from the base 3e. When the electromagnetic switching valve 3k2 is set to the A0 position, the expansion and contraction of the hydraulic cylinder 3k stops and the toggle port 3c also stops.

In the description of the configuration of the present invention, "circuit for moving the toggle block to the base side" is described. However, this is, for example, a link between the toggle block 3c and the base 3e. The addition of the mechanism takes into account that the relationship between the expansion and contraction of the hydraulic cylinder 3k and the direction of movement of the toggle port 3c is opposite to the above relationship.

Undo the description. The “circuit on the side for moving the toggle port 3 c to the base 3 e side (that is, the circuit on the head side of the hydraulic cylinder 3 k in the third embodiment)” includes the accumulator 3. k 5 and a pressure switch 3 k 6.

The accumulator 3k5 works as follows. When the hydraulic cylinder 3 k is used, the protrusion 3 c 4 of the toggle port 3 c is formed on the base 3 when the jaw crusher 3 is in operation due to the internal leakage of the hydraulic cylinder 3 k and the inertia of the swing jaw 3 b during the swing. Attempts to periodically separate from the V-shaped opening 3 e 1 of e. In a nutshell, they try to play. When the toggle block 3c is in operation with the jog crusher 3 in operation, the toggle block 3c is moved to the base 3e side of the pressure circuit of the hydraulic cylinder 3k. By providing the accumulator 3k5 in the circuit on the side to be operated, the accumulated pressure of the accumulator 3k5 acts on the hydraulic cylinder 3k, so that it is blocked. The pressure switch 3k6 works as follows. Jaw crusher 3 operates for a long time When the internal leakage of the hydraulic cylinder 3k accumulates, the accumulated pressure of the accumulator 3k5 also gradually decreases. In this case, the hydraulic pressure for pushing the toggle block 3c toward the base 3e also gradually decreases, and finally, the toggle block 3c may rattle. Therefore, the pressure switch 3k6 is configured so that the circuit on the side that moves the toggle port 3c to the base 3e side is lower than the maximum accumulated pressure (ie, the maximum hydraulic pressure) Pmax of the accumulator 3k5. When the pressure reaches the first predetermined pressure, the signal S 3 is input to the controller 3 k 3. The controller 3k3 receives the force (as the first example) or the signal S3 from when the bracket signal S3 is received when the solenoid-operated switching valve 3k2 is in the A0 position. From this time, the solenoid-operated directional control valve 3 k 2 is set to A 1 from the time when the signal S 3 is received until the pressure reaches the second predetermined pressure (as the third example). The position signal S 2 is input to the solenoid-operated directional control valve 3 k 2. That is, the pressure accumulation of the accumulator 3k5 is kept constant, or the accumulator 3k5 is restored to, for example, the maximum pressure accumulation Pmax to prevent rattling of the toggle port 3c. Here, the first predetermined pressure <the second predetermined pressure ≦ the maximum accumulated pressure Pmax. Details are as follows.

In the first example, the circuit pressure of the accumulator 3k5 is increased to a predetermined pressure (first predetermined pressure) by the controller 3k3, the electromagnetic switching valve 3k2, and the pressure switch 3k6. Performs the function of maintaining. Simply put, these are one pressure reducing valve. In the first example, when there is much oil leakage from the hydraulic cylinder 3k, the electromagnetic switching valve 3k2 always operates. Therefore, the above-mentioned second and third examples are listed as means for preventing this. First, the predetermined period of the second example can be set, for example, to a period until the accumulator 3k5 reaches the maximum pressure accumulation Praax. On the other hand, in the third example, for example, the second predetermined pressure can be set to the maximum accumulated pressure P max. The third example is substantially the same as the second example. Of course, the predetermined period of the second example and the second predetermined pressure of the third example may be based on other values. According to these second and third examples, the solenoid-operated switching valve 3 k 2 does not always operate as in the first example, so that it can contribute to the extension of the life of the solenoid-operated switching valve 3 k 2 and so on, In addition, the basic effects (eg, energy saving) of the accumulator 3k5 can be achieved.

Various hydraulic circuits can be prepared in place of Fig.5. For example, it may be configured as shown in FIG. That is, as shown in Fig. 6, the controller 3k3 is eliminated. Also accumure Replace 3k5 overnight and pressure switch 3k6 with pressure reducing valve 3k7. However, the upstream side of the pressure reducing valve 3k7 is connected to the electromagnetic switching valve 3k2, while the downstream side is connected to the hydraulic cylinder 3k and also to the electromagnetic switching valve 3k2. The electromagnetic switching valve 3k2 has, for example, the following two positions, an A1 position and an A2 position. That is, the A1 position is a port for sending the pressure oil from the hydraulic pressure source 3k1 to the head side of the hydraulic cylinder 3k (that is, downstream of the pressure reducing valve 3k7), and a pressure reducing valve 3k7. And a port for draining return oil from the bottom side of the hydraulic cylinder 3k. On the other hand, the A2 position drains the hydraulic oil from the hydraulic source 3k1 to the bottom side of the hydraulic cylinder 3k, and the return oil from the hydraulic cylinder 3k head side. It has a port to be used. In addition, even if it says drain, it does not matter to turn it not only to the tank but also to the oil device for other operation circuits. The switching switch 3k4 is a two-position switch consisting of the B1 position corresponding to the A1 position and the B2 position corresponding to the A2 position, and is connected to the electromagnetic switching valve 3k2. Electrically connected.

The operation of the hydraulic circuit of FIG. 6 will be described. When the operator sets the switching switch 3k4 to the B1 position, the electromagnetic switching valve 3k2 is set to the A1 position. Then, the hydraulic oil on the bottom side of the hydraulic cylinder 3 k drains, but the head side receives a specified amount of oil based on the action of the pressure reducing valve 3 k 7, and the hydraulic cylinder 3 k Shrink. This state is when the crusher 3 is operating. On the other hand, when adjusting the clearance of the outlet of the jaw crusher 3 (that is, when inserting or removing the shim 3j), the switching switch 3k4 is set to the B2 position. In this way, the solenoid-operated directional control valve 3 k 2 is in the A 2 position. Then, the pressure oil on the head side of the hydraulic cylinder 3k drains, but the hydraulic pressure from the hydraulic pressure source 3k1 acts on the bottom side, and the hydraulic cylinder 3k is extended. At this time, the toggle block 3c is separated from the base 3e, so that the shim 3j can be moved in and out.

Each of the above hydraulic circuit examples may be a pneumatic circuit. In this case, the hydraulic pressure source 3k1 is replaced with the pneumatic pressure source 3k1, and the hydraulic cylinder 3k is replaced with the pneumatic cylinder 3k.

The effect of the first embodiment will be described.

(1) First, a tag having a protrusion 3c4 on the base 3e side, the upper surface of which is a downward slope. Ru block 3c and this toggle block 3. On the side, a base 3 e having a V-shaped opening 3 e 1 having a shape conforming to the protrusion 3 c 4 and capable of sandwiching the protrusion 3 c 4 is provided. Therefore, free movement of the double block 3c in the vertical direction Z and the front-back direction X can be prevented without using the conventional male screws 3h and 3i. In addition, the laborious manual work of the conventional external threads 3h and 3i can be eliminated. The details are as follows.

When the jaw crusher 3 is stopped, the moment force based on the own weight of the swinging jaw 3b causes the protrusion 3c4 of the toggle block 3c to move through the toggle plate 3f. Press it into the V-shaped opening 3 e 1 of the base 3 e. On the other hand, when the jaw crusher 3 is in operation, the moment force based on the own weight of the swing jaw 3b and the crushing force and force of the object 5 to be crushed Toggle block 3c via the toggle plate 3f Press the protrusion 3c4 of the base 3 into the V-shaped opening 3e1 of the base 3e. In any case, the toggle opening 3c cannot be moved in the vertical direction Z nor in the front-rear direction X, and is fixed. Even if it is fixed, it is not completely fixed, but the `` pressing force against the V-shaped opening 3 e 1 '' changes periodically due to the inertial force based on the swing of the swing jaw 3 b, Therefore, the above-mentioned “slowing” occurs. The backlash is suppressed by the hydraulic cylinder 3 k and the accumulator 3 k 5.

FIG. 1 shows a state in which the outlet gap <5 of the jaw crusher 3 is narrowed (5 = 51). FIG. 7 shows the direction of the toggle plate 3f corresponding to FIG. 1 (ie, the force vector applied to the V-shaped opening 3e1). On the other hand, FIG. 2 is a diagram showing a state in which the outlet gap 5 is widened (<5 = δ2, where <5 2><51). FIG. 8 shows a force vector applied to the V-shaped opening 3e1 corresponding to FIG. As shown in FIGS. 7 and 8, when the exit gap <5 is adjusted, the strength and direction of the force vector change. For this reason, at least the upper surface (that is, the downward slope) of the protrusion 3c4 of the toggle mouthpiece 3c should have an angle 0 between the upper surface and the power vector exceeding 90 degrees. Must be kept. Note that the friction coefficient of the base 3e ゃ shim 3j shall not be considered. Otherwise, the toggle block 3c will slide upward on the base 3e over the shim 3j, The groove 3c comes off the V-shaped opening 3e1 of the base 3e.

(2) Secondly, since the pretension members 3g and 3g are installed between the back surface of the swing jaw 3b and the toggle block 3c, the pretension members 3g and 3g are adjusted when adjusting the exit gap δ. g and 3 g do not need to be readjusted, which means that the conventional hard work is eliminated, and as a result, the conventional hydraulic cylinder (as described above, Fig. 18 (Not shown in the figure) can be used effectively.

Conventionally, a pretension member 3 g has been installed between the lower rear surface of the swinging jog 3 b and the base 3 e. Therefore, every time the exit gap <5 is adjusted, the installation interval increases or decreases as the shim 3 j is reduced. For this reason, it was necessary to reset the pretension according to the increase or decrease of the installation interval. According to the above embodiment, however, the pretensioning members 3g, 3g are placed between the back surface of the swinging joint 3b and the side surfaces (that is, the left and right surfaces) of the toggle hook 3c. It was erected. Therefore, even if the number of the shims 3 j is increased or decreased to adjust the exit gap 5, the installation interval does not change, so that it is not necessary to reset the pretension.

Further, the hydraulic cylinder conventionally used only for adjusting the outlet gap 5 of the jok crusher 3 can be used instead of the conventional male screw 3 i. That is, as described above, in the present embodiment, on the side of the base 3 e, a toggle port 3 c having a projection 3 c 4 whose upper surface is a downward slope, and on the side of the toggle block 3 c, And a base 3 e having a V-shaped opening 3 e 1 having a shape conforming to the portion 3 c 4 and capable of sandwiching the protruding portion 3 c 4. Therefore, when toggle block 3c comes into contact with shim 3j, it cannot move further backward. If there is no shim 3 j, when the toggle block 3 comes into contact with the base 3 e, it cannot move further backward. However, during operation of the jog crusher 3, the toggle opening 3c is made to rattle against the base 3e (or the shim 3j) due to the inertia force of the swinging jog 3b. Become. That is, in the first embodiment, the hydraulic cylinder used conventionally only when adjusting the outlet gap 5 of the joe crusher 3 is used not only for adjusting the outlet gap 5 but also for the conventional male screw 3 i. Instead, it is also used to prevent the ratchet 3c from rattling when the job crusher 3 is in operation. In addition, since the hydraulic cylinder is 3 k, automatic control is possible, and the toggle Accumulator 3k5 etc. can also be used to completely prevent 3c with gas, and the energy saving function of this accumulator 3k5 can be used.

(3) That is, according to the above-described third embodiment, the outlet gap 5 of the jog crusher 3 can be adjusted without requiring any manpower, and the adjusted outlet gap 5 can be automatically maintained. This is the outlet gap adjustment mechanism for the jockey crusher.

Next, a second embodiment will be described with reference to FIGS. Note that the same members as those in FIGS. 1 to 8 of the first embodiment are denoted by the same reference numerals, and redundant description will be omitted.

The second embodiment differs from the first embodiment in the following points. That is, as shown in FIGS. 9 and 10, in the second embodiment, the bracket 3e5 is fixed to the base 3e almost in proximity to the upper surface of the toggle block 3c. c is connected to the base 3e by one hydraulic cylinder 3k, and two sets of male screws 3i, 3i on the left and right and the double nuts 3i1, 3i1 screwed to these are detachably connected. That is the point. The details are as follows.

The bracket 3e5 is provided so that the toggle block 3c does not fall down from the base 3e and is not easily dropped when, for example, the toggle block 3c is attached or detached during overhaul, and the work is facilitated. It is a member.

As the hydraulic cylinder 3 k, a single-acting cylinder 3 k shown in FIGS. 11 and 12 and a double-acting cylinder 3 k shown in FIGS. 13 and 14 are applied as necessary. Unlike the first embodiment, the hydraulic cylinder 3k is activated only when adjusting the outlet clearance <5. That is, when adjusting the exit gap <5 (that is, when inserting and removing the shim 3j), first loosen the double nuts 3i1 and 3i1. As a result, the toggle port 3c becomes movable in the front-rear direction X from the base 3e. Then, extend the hydraulic cylinder 3k to separate the close contact state between the toggle port 3c and the base 3e (see FIGS. 11 and 13) (see FIGS. 12 and 14). And After the completion of the insertion of the shim 3j, the hydraulic cylinder 3k is contracted as follows. If the hydraulic cylinder 3k is a single-acting cylinder, it is performed by one or both of the momentum of the swinging joint 3b and the tightening of the double nuts 3i1, 3i1. If the hydraulic cylinder 3k is a double-acting cylinder, it is compressed by hydraulic pressure. When the hydraulic cylinder 3k is expanded and contracted, the toggle block 3c and the base 3e are The toggle opening 3c may swing right and left due to the balance of the frictional force between the left and right sides. In the case of a single-acting cylinder 3k, it is not fixed to the single-acting cylinder 3k force toggle block 3c as shown in Figs. Therefore, even if the toggle block 3c swings, the single-acting cylinder 3k will not be damaged. On the other hand, if it is a double acting cylinder 3k, it will be connected to the toggle block 3c. For this reason, in the case of the double-acting cylinder 3k, the toggle block 3c side is pin-connected to the toggle block 3c with a pin in the vertical direction Z as shown in FIGS. 13 and 14. For this reason, the double-acting cylinder 3k can be prevented from being damaged by the movement of the toggle block 3c.

In addition, the toggle groove 3c is fixed to the base 3e by the male screw 3i and the double nut 3i1, but when the joint crusher 3 is operated, the swing joint 3c is fixed. Vibrates in the front-rear direction X due to the inertia force of 3 b. Also, the vibration in the vertical direction Z of the swing jaw 3b is basically absorbed by the swing of the toggle plate 3f around the first contact portion 3b1 and the second contact portion 3c1. However, the toggle block 3c also vibrates slightly in the vertical direction Z. For this reason, there is a concern that the male screw 3 i may break due to these microvibrations. Therefore, in the second embodiment, as shown in FIG. 10, as a first measure, the male screw 3 i is connected to the toggle port 3 c with a pin to reduce the vibration transmission to the male screw 3 i. Therefore, the rupture resistance is enhanced. As a second measure, as also shown in FIG. 10, the axial length of the male screw 3 i is increased to increase the axial force, thereby increasing the fracture resistance. As described below, there is another third measure.

As shown in FIG. I5 and FIG. 16, two moments Mo and Ms are generated around the second contact portion 3c1. The moment Mo is a moment around the second abutment 3c1 based on the weight of the toggle port 3c. On the other hand, the moment Ms is a moment around the second contact portion 3c1 based on the tension of the pretensioning member 3g. Note that this moment M s is pretensioned with the second contact portion 3 cl so that the tension axis P of the pretension member 3 g passes through the second contact portion 3 c 1. Obviously, this does not occur when member 3g is placed. Here, the pre-tension of the pre-ion member 3 g will be described in advance. The vibration in the front-rear direction X includes the force pressing the toggle block 3c against the base 3e (rearward force) and the force trying to separate the toggle block 3c from the base 3e (front). Directional force). Here, the rearward force is a force pressing the toggle port 3c against the base 3e, so that the protrusion 3c4 of the toggle port 3c is statically attached to the base 3e. It can be considered that it is a prone state completely sandwiched by the V-shaped opening 3 e 1 of FIG. Therefore, there is no concern that the backward force will damage the male screw 3 i. On the other hand, the force in the forward direction is the mass of the toggle plate 3f or the toggle block 3c (that is, the “toggle plate 3f よう the toggle block 3c, etc., which tries to make the swinging 3b stationary). Resilience ”). The pretension is a force for securing the mass. In other words, if there is no pretension, the toggle plate 3f will be connected to the first contact portion 3b1 and the second contact portion 3c1 when the forward force of the swing jaw 3b is generated. It will fall off from between. That is, the pretension is set very large. Specifically, for example, if the weight of the toggle port 3c is about 0.3 tonnes, the pretension is, for example, 2 tonnes. It is about ton. Undo the description. Therefore, in the second embodiment, as shown in FIG. 15, both moment moments Mo and Ms are set in the same direction. This can be achieved by positioning the shortest distance L1 from the second contact portion 3c1 to the axis P below the second contact portion 3c1, as shown in FIG. Thus, the lower surface of the toggle block 3c is always grounded to the upper surface of the V-shaped opening 3e1 of the base 3e. In other words, the toggle block 3c does not vibrate vertically even if it receives a slight vibration in the vertical direction Z. Further, even in the front-rear direction X, the direction of the repetitive load on the male screw 3 i is also simple, because it merely tries to slide in the front-rear direction X while being in contact with the upper surface of the V-shaped opening 3 e 1. That is, various means for fixing the toggle block 3c to the base 3e side can be simplified and reduced in size. Specifically, the rupture resistance of the male screw 3i is simplified and the rupture resistance is enhanced. Also, for example, the contact surface between the toggle opening 3c and the base 3e is worn by vibration, but this wear is also in the simple mode. In addition, the shape of the shim 3j can be easily improved.

In other words, the above-mentioned effect is obtained by the relationship of the two moments Mo, Ms and Mo + Ms> 0, assuming that the rotation direction of the moment Mo is “Mo> 0”. Can be As shown in FIG. 16, such a relationship “M o + M s> 0” is obtained by dividing the shortest distance L 1 from the second contact portion 3 c 1 to the axis P by the second contact portion 3. This can also be achieved when it is positioned above c 1 (ie, when “M s <0 J”).

That is, the pre-tensioning member 3 g is swing-moved so that both the moments Mo and Ms satisfy the relationship of “Mo + Ms> 0” with “Mo> 0”. If it is installed between the back surface of 3b and the toggle opening 3c, the fracture resistance of the male screw 3i can be increased. This is the third measure. It should be noted that the effect of the third measure is not limited to the male screw 31 alone. For example, when the hydraulic cylinder 3k urges the toggle block 3c to the base 3e side by hydraulic pressure when the joe crusher 3 is in operation, as in the first embodiment described above. Validity does not wait for explanation. Industrial applicability

INDUSTRIAL APPLICABILITY The present invention is useful as an outlet gap adjusting mechanism for a jaw crusher which has a simple structure and is easily adjusted.

Claims

The scope of the claims

1. Fixed joist (3a),

A swinging jog (3b) facing the fixed jog (3a);

A toggle shaft (3c) located on the back side of the swinging jaw (3b) and a crank shaft for fixing the fixed jaw (3a) and pivotally mounting an upper end of the swinging jaw (3b). A base (3e) that supports (3d) and adjustably fixes the position of the toggle opening (3c);

One end abuts on a first contact portion (3bl) provided on the back surface of the swing jaw (3b), and a first abutment (3b) provided on the side of the toggle jaw (3c) of the toggle jaw (3c). 2 A toggle plate (3f) that abuts the other end on the abutment part (3d),

In order to make both ends of the toggle plate (3f) contact with the first contact part (3bl) and the second contact part (3cl), the back surface of the swing jaw (3b) and the base A pretensioning member (3g) installed between the base (3e) and the swing jaw (3b) and having a tensile force for attracting the base (3e) to each other;

By rotating the crank shaft (3d) to swing the swing jaw (3b), the swing jaw (3b) is swung from the upper end of the fixed jaw (3a) and the upper end of the swing jaw (3b). The crushed material (5) is crushed by crushing the charged crushed material (5) through an outlet gap (5) formed between the lower end of the fixed jaw (3a) and the lower end of the swing jaw (3b). When discharging the crushed particles of the jaw crusher, the position of the toggle block (3c) is adjusted to adjust the outlet clearance (ά), and the particle size of the crushed particles can be freely changed. ,

The toggle block (3c) forms a protruding portion (3c4) having a downward slope on the upper surface on the base (3e) side.

The base (3e) has, on the toggle block (3c) side, a V-shaped opening (3e l) having a shape matching the protrusion (3c4) so that the protrusion (3c4) can be sandwiched therebetween. ), And can be freely inserted and removed between the down slope of the toggle block (3c) and the base (3e). An outlet gap adjusting mechanism for a joke lasher, characterized by having a shim (3j).

2. In the outlet gap adjustment mechanism of the jog crusher described in claim 1,

The pre-tension member (3g) is installed between the back surface of the swinging rod (3b) and the toggle block (: k), and has its own weight of the toggle port (3c). The pre-tension for bringing the moment M around the second contact portion (3c 1) based on the above, the back surface of the swing joint (3b) and the toggle hook (3c) into contact with each other. The moment Ms around the second contact portion (3cl) based on the tension of the connection member (3g) satisfies the relationship of “Mo + Ms> 0” as “Mo> 0”. An outlet clearance adjustment mechanism for the jog crusher, which is installed so as to be installed.

3. In the jaw crusher outlet clearance adjusting mechanism according to claim 2,

The toggle crusher (3c) is fixed to the base (3e) by a screw (3i) via the shim (3j). Gap adjustment mechanism.

4. In the outlet gap adjustment mechanism of the jog crusher according to claim 1,

The pre-tension member (3g)

It is installed between the back of the swing joint (3b) and the toggle port (3c) and is installed between the toggle port (3c) and the base (3e). A hydraulic cylinder (3 k);

An accumulator (3k5) provided in a circuit that moves the toggle port (3c) to the base (3e) side among the pressure circuits of the fluid pressure cylinder (31). A special feature is a mechanism for adjusting the clearance of the outlet of the crusher.

5. In the outlet gap adjusting mechanism for a joke crusher according to claim 4, The internal pressure of the accumulator (3k5) is detected, and when the detected internal pressure has decreased to the first predetermined pressure, the internal pressure is increased to the second predetermined constant pressure after the decrease or for a predetermined period after the decrease. A control means (3k3) for automatically supplying fluid pressure to a circuit in which the accumulator (3k5) is provided, the outlet gap adjusting mechanism for a jog lasher.