JPH07313890A - Method of removing wedge for fixing jaw plate - Google Patents

Abstract

PURPOSE:To float a wedge for fixing a jaw plate and to remove it using a hydraulic ram without welding a frame-shaped jig or the like to the wedge in the case the wedge for fixing the jaw plate is beaten by raw ore to be crushed, and deformed and bitten into the jaw plate. CONSTITUTION:In wedges for fixing a fixed jaw plate, ram inserting parts 6a are each installed in the back surface parts on both ends of a wedge 6. When removing the wedge, hydraulic ram R is arranged in the ram inserting part 6a and operated, allowing the wedge 6 to be floated up and removed. In wedges for fixing a swing jaw plate, among fitting bolts 9 for tightening a wedge 7 to a tightening and fixing sent 5e, two bolts that are located on both sides are pulled out. A hydraulic ram R is arranged between a front side plate 5a and the tightening and fixing seat 5e there and operated, allowing the wedge 7 to be floated and removed through a pressurizing bar R1 at the tip of the hydraulic ram R passed through a through hole 5d of the front side plate 5a.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a jaw crusher used as a primary crusher in the field of crushing stones,
More specifically, the present invention relates to a method of removing a wedge as a consumable member and a wedge for fixing a swing jaw plate to a main body side when the wedge plate is reversed or replaced due to abrasion of the jaw plates.

[0002]

2. Description of the Related Art A jaw crusher widely used as a primary crusher in the field of crushing stone, etc. is a front sectional view showing a schematic configuration of a typical example thereof, as shown in FIG. Front of the fixed jaw plate (3) mounted inside the front wall (2) of the body (1) and the swing jaw body (5) that tilts and swings at the rear facing the fixed jaw plate (3) With the swing jaw plate (4) attached on top, a large lump of ore put in from above is crushed into particles of a predetermined size or smaller. Also, these jaw crushers perform crushing under high load and harsh conditions,
Wear-resistant materials such as high-manganese cast steel are used for the fixed and swing jaw plates (3) and (4), but wear is inevitable due to continuous crushing, and they are replaceably attached as consumable members. Also, the fixed and swing jaw plates (3), (4) wear more severely in the lower part, so as shown in Figure (a), the shape was made symmetrical vertically, and the lower part wear progressed to some extent. It is often adopted that has been constructed so that it can be inverted and used continuously.

The fixed and swing jaw plates (3) and (4) used under high load and harsh conditions are firmly fixed so as to prevent loosening and rattling during operation crushing. When the wear progresses and it is inverted or replaced, it is necessary to install the device in a configuration that can be easily removed. For this reason, conventionally, as shown in FIG. 2, a method of firmly fixing using wedge-shaped wedges (6) and (7) has been adopted.

The fixing method using these wedges (6) and (7) will be described. First, the front wall (2) of the jaw crusher main body (1) has an engaging support projection (2b) at the inner lower part and an upper part. Has a fixed protrusion (2a) on the fixed jaw plate (3).
Is disposed on the inner surface of the front wall (2) with its lower end engaged and supported by the engagement support projection (2b). Also, in this state, there is a predetermined space between the upper end surface of the fixed jaw plate (3) and the lower side surface of the fixed protrusion (2a) of the front wall (2). The end face and the lower side face are formed as inclined faces narrowing toward the front wall (2) side. Then, between the fixed jaw plate (3) and the fixed protrusion (2a), a wedge (6) formed in the shape of a square beam having a trapezoidal cross section is inserted like a wedge, and the front wall (2 ) Plural mounting bolts arranged through
Via (8), it is fastened to the fastening fixing seat (2c) provided in the front part of the front wall (2) with a high tightening force, and under this structure,
The fixed jaw plate (3) is firmly and removably fixed on the inner surface of the front wall (2).

The swing jaw plate (4) of the swing jaw body (5) is also fixed under the same structure. That is, the swing jaw body (5) is
The lower part of the front surface of (5a) is the engaging support projection (5c), and the upper part is the fixed projection (5c).
b), the swing jaw plate (4) is disposed on the front surface of the swing jaw body (5) with its lower end engaged and supported by the engaging support projection (5c), and its upper end surface. It is fixed on the front surface of the swing jaw body (5) by a wedge (7) inserted like a wedge between the fixed protrusion (5a) and the fixed protrusion (5a).
Further, the wedge (7) is formed in the shape of a square beam having a trapezoidal cross section as described above, and is arranged through the through hole (5d) provided in the front side plate (5a) of the swing jaw body (5). It is fastened to the fastening fixing seat (5e) provided at the rear of the swing jaw body (5) via the plurality of mounting bolts (9), and under this structure, the swing jaw plate (4) is attached to the swing jaw body (4). 5) It is firmly and detachably fixed on the front surface.

[0006] Then, abrasion continues to progress due to continued crushing,
When it becomes necessary to invert or replace the fixing and swing jaw plates (3), (4), after unfastening the mounting bolts (8), (9) and removing the wedges (6), (7), the fixing and Take out the swing jaw plates (3) and (4) from above the crusher body (1) and invert or replace them.

[0007]

As described above, the wedge-shaped wedges (6) and (7) are used for fixing and the swing jaw plates (3) and (4) are fixed.
By tightening the mounting bolts (8), (9) that fasten (6), (7) at an appropriate point in time, the looseness generated during operation crushing is corrected, and the fixed and swing jaw plates (3), (9) 4) Can be fixed so that it does not rattle. Also, by removing the wedges (6) and (7), it is possible to easily fix the worn-out wear and to invert or replace the swing jaw plates (3) and (4), but in actual operation, those The wedges (6) and (7) are deformed by being crushed by the crushed rough stones, and metal flow also occurs on the end surface layers of the fixed and swing jaw plates (3) and (4), so that they wedge into each other. Therefore, it often happens that it becomes difficult to remove the wedges (6) and (7).

Conventionally, in the case where such a situation occurs, an explanatory view thereof (FIG. 2) (b) and (b).
As shown in (c), which is a view from the arrow A in the figure, attach a U-shaped frame jig (J) to each end of the wedge (6) that is engaged with the fixed jaw plate (3). While welding, a hydraulic ram (R) is placed between the frame-shaped jig (J) and the fixed protrusion (2a) of the front wall (2) for synchronous operation. (6) was lifted and removed. Further, as for the wedge (7) that bites into the swing jaw plate (3), the same method as described above was adopted as shown in the explanatory view (d). However, with this method, a frame-shaped jig must be prepared and welding work must be carried out each time the wedge is removed, and the work position and environment are poor, and this is a complicated work that requires a relatively long time. There has been a problem that the work efficiency of inverting or replacing the plate is greatly reduced, and eventually the operating rate of the jaw crusher is also reduced.

The present invention has been made in order to solve the above-mentioned problems of the prior art, and even when the wedge fixing the jaw plate is hit by the crushed rough stone and deformed to dig into the jaw plate. An object of the present invention is to provide a method for removing a wedge for fixing a jaw plate, which can be easily lifted and removed without welding a frame jig or the like to the wedge.

[0010]

In order to achieve the above object, the present invention has the following constitution. That is, the method of removing the wedge for fixing the jaw plate according to claim 1 is such that the lower end of the jaw crusher body is engaged with and supported by the lower inside of the front wall of the jaw crusher body, and the upper end surface of the fixed jaw plate is arranged on the inner surface of the front wall. And a fixed protrusion that is provided on the inside of the front wall at the same time as a wedge shape, and is fastened to the front wall via a plurality of mounting bolts to fix the fixed jaw plate to the front portion. A method for removing a wedge for fixing a jaw plate, which removes a wedge fixed to a wall when reversing or replacing the fixed jaw plate, wherein the wedge has a square rear surface on both sides of the front wall. A ram charging section that is cut out is provided in advance,
At the time of removing the wedge, hydraulic rams are loaded and arranged in the ram loading portions to operate synchronously, and the wedges are lifted and removed by the pressing force of the hydraulic rams.

According to a second aspect of the present invention, there is provided a method of removing a wedge for fixing a jaw plate, wherein a filling member for preventing crushed powder intrusion is removably filled in the ram charging portion, and when the wedge is removed, This filling member is removed prior to the placement of the hydraulic ram in the ram loading portion.

According to a third aspect of the present invention, there is provided a method for removing a jaw plate fixing wedge, wherein a lower end of a swing jaw body of a jaw crusher is engaged with and supported by a lower end of the swing jaw body, and an upper end surface of a swing jaw plate disposed on the front surface of the swing jaw body. When,
It is fitted in a wedge shape between a fixed projection provided on the lower part of the front surface of the main body and is attached to the rear part of the main body through a plurality of mounting bolts arranged through through holes provided in the front side plate of the swing jaw main body. Fastened to the provided fastening seat,
A method of removing a wedge for fixing the swing jaw plate to the swing jaw main body, which is to be removed when the swing jaw plate is inverted or replaced, wherein the wedge is fastened when the wedge is removed. The two mounting bolts located on both outer sides of the mounting bolt were removed, and a hydraulic ram was provided between the front side plate of the swing jaw body where the mounting bolt was located and the fastening fastening seat at the rear. Along with the arrangement, the tip of the ram is brought into contact with the back surface of the wedge through the through hole after the mounting bolt is extracted to operate synchronously, and the wedge is lifted by the pressing force of the hydraulic rams and removed. And

[0013]

According to the first aspect of the present invention, the wedge-shaped wedges that fix the fixed jaw plate on the inner surface of the front wall of the jaw crusher body are formed by notching the back surfaces of both ends of the wedge-shaped wedges on the front wall side. A ram charging section is provided, and when the wedge is removed when reversing or replacing the fixed jaw plate, hydraulic rams are charged and arranged in the respective ram charging sections to operate synchronously. Even if it deforms when it is crushed by a rough stone and it digs into the fixed jaw plate, it does not need to weld a frame-shaped jig or the like as in the prior art, but the wedges are pressed by the hydraulic ram from the back side. Can be lifted in parallel and can be removed efficiently.

Further, in the invention according to claim 1, a filling member for preventing crushed powder intrusion is removably filled in the ram charging portion, and when the wedge is removed, the charging member is charged with the ram. Since the hydraulic ram is removed prior to charging and placement in the ram charging section, crushed powder is prevented from entering the ram charging section during operation crushing, and the ram charging section after removing this filling member The hydraulic ram can be charged and arranged easily and stably.

By the way, in the swing jaw main body of the jaw crusher, an upper plate or the like for protecting the upper mechanism of the swing jaw main body is usually attached above the wedge for fixing the swing jaw plate on the front surface of the swing jaw main body. Even if a ram charging section is provided as in the case of a wedge that fixes the jaw plate, it is difficult to load and arrange a hydraulic ram or the like in the ram charging section. When removing the wedge when reversing or replacing the jaw plate, pull out the two mounting bolts located on both outer sides of the mounting bolts that fastened the wedge, and swing jaws where the mounting bolts were located. Place a hydraulic ram between the front plate of the body and the fastening seat on the rear, and remove the mounting bolt from the ram tip. After swinging, the swing jaw body is brought into contact with the back surface of the wedge through the through hole of the front side plate to operate synchronously, so even if this wedge is hit and deformed by the crushed rough stone, it will even bite into the swing fixed jaw plate. The wedges can be lifted up in parallel by the pressing force from the rear surface side by the hydraulic rams without welding the frame-shaped jig or the like unlike the prior art, and can be removed efficiently. In addition, since a relatively large space is usually secured at the rear of the swing jaw body of the jaw crusher for inspecting and maintaining the drive mechanism of this swing jaw body, it is also necessary to remove and install the hydraulic ram at the rear portion. You can do it with good habit

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a method for removing a jaw plate fixing wedge according to the present invention will be described below with reference to the drawings. [FIG. 1] is an explanatory view of a schematic configuration of a jaw crusher according to an embodiment of the present invention and a method for removing a wedge for fixing the jaw plate thereof. (A) is a front sectional view showing the schematic configuration, (b) The figure is a partial view taken along the line AA of the figure (a), and the figure (b) and the figure (c) are explanatory views of the method of removing the wedge. The jaw crusher of this embodiment is the same as that shown in FIG. 2 (a), except that the structure of the wedge for fixing the fixed jaw plate is partly different. 2] will be assigned the same reference numerals and will be briefly described.

The jaw crusher of this embodiment shown in (a) of FIG. 1 includes a fixed jaw plate (3) attached to the inside of the front wall (2) of the crusher body (1), and the fixed jaw. A swing jaw plate (4) mounted on the front surface of a swing jaw body (5) that tilts and swings at the rear facing the plate (3), and its fixing and swing jaw plates (3), (4) Between the two), crush the rough stones input from above. Further, the fixed and swing jaw plates (3) and (4) are vertically symmetrical and have a shape that can be inverted and used.

Also, the fixed jaw plate (3) is attached to the front wall.
(2) The lower end is engaged and supported by the lower engaging support projection (2b), and is wedge-shaped fitted between the upper end surface and the front wall (2) upper fixed projection (2a). It is pressed and fixed onto the inner surface of the front wall (2) by a girder wedge (6). on the other hand,
The wedge (6) is provided with a fastening fixing seat (2c) provided at the front portion of the front wall (2) through a plurality of mounting bolts (8) arranged to penetrate the front wall (2). With this structure, the fixed jaw plate (3) is firmly and removably fixed on the inner surface of the front wall (2). At both ends of this wedge (6), as shown in (b), ram loading parts (6a) are provided by notching the back side of both ends on the front wall side in a square shape. In addition, in order to prevent intrusion of crushed powder into the ram charging section (6a) during operation crushing,
A fibrous (waste in this embodiment) filling member (10) is removably filled.

Further, the swing jaw plate (4) has its lower end engaged and supported by an engaging support projection (5c) at the lower front surface of the front side plate (5a) of the swing jaw body (5) and its upper end surface. The front side plate (5a) of the swing jaw body (5) is pressed onto the front surface of the swing jaw body (5) by a girder wedge (7) fitted in a wedge shape between the front side plate (5a) and the fixed protrusion (5b) on the front side. It is fixed. On the other hand, the wedge (7) is attached to the swing jaw body (5) via a plurality of mounting bolts (9) arranged through through holes (5d) provided in the front side plate (5a) of the swing jaw body (5). ) It is fastened to the fastening fixed seat (5e) provided on the rear part, and under this structure, the swing jaw plate is
(4) is fixed firmly and detachably on the front surface of the swing jaw body (5). Also, the through hole (5d) of the front side plate (5a)
Has an inner diameter larger than the inner diameter of the bolt hole (7a) for attaching the mounting bolt (9) to the wedge (7).

In the jaw crusher having the above-described structure, when the abrasion and wear of the jaw crusher continue due to continuous crushing, and it becomes necessary to invert or replace the swing jaw plates (3) and (4), the mounting bolts (8) and (9) After unfastening and removing wedges (6), (7), fix and swing jaw plates (3), (4)
The crusher body (1) is taken out from above and inverted or replaced.
As (6) and (7) are hit and deformed by crushed rough stones, metal flow also occurs at the end and surface layers of the fixing and swing jaw plates (3) and (4), so they are in a state of biting each other. In many cases, the wedges (6) and (7) cannot be removed only by unfastening the mounting bolts (8) and (9). Here, in this embodiment, the wedges (6) and (7) are removed by the following procedure, and thereafter, the fixing and the swing jaw plates (3) and (4) are reversed or replaced.

The wedge (6) which fixes the fixed jaw plate (3) first unfastens each mounting bolt (8) which fastens the wedge (6), and at the same time, the wedge (6) is unfastened.
(6) Remove the filling member (10) filled in the ram charging section (6a) on the back side of both ends, and then remove the ram charging section (6a) as shown in Fig. (C). Here, a short hydraulic ram (R) connected to a hydraulic pressure supply device (not shown) is loaded and arranged from above. Then, hydraulic pressure is supplied to the two hydraulic rams (R) from the hydraulic pressure supply device to operate synchronously, and the wedge (6) is forcibly lifted by the pressing force of the hydraulic rams (R) to fix the fixed jaw plate. (3) Release the bite and remove.

In this way, the fixed jaw plate (3)
In this example, remove the wedge (6) that was holding the
This wedge (6) was hit by crushed rough stone and deformed,
Even if the wedge (6) bites into the fixed jaw plate (3), the wedge (6) is pushed by the pressing force from the back side by the two hydraulic rams (R) without welding frame jigs as in the prior art. It can be lifted up in parallel and removed efficiently. Also, the ram loading section (6a) of this wedge (6)
Since the fibrous filling member (10) is filled to prevent the intrusion of crushed powder during operation crushing, the ram charging section (6a) after removing this filling member (10) The hydraulic ram (R) can be installed easily and stably.

On the other hand, the wedge (7) fixing the swing jaw plate (4) first unfastens the mounting bolts (9) fastening the wedge (7), Remove the two mounting bolts (9) located on both outer sides of 9). Next, as shown in Fig. (D), between the front side plate (5a) of the swing jaw body (5) where the two mounting bolts (9) were located and the fastening fixing seat (5e), respectively. Here, a hydraulic ram (R), which is connected to a hydraulic pressure supply device (not shown) and has a pressing rod (R1) attached to the ram tip, is arranged, and the tip of the pressing rod (R1) is attached to the above two mounting bolts. Through hole (5d) in front plate (5a) after removing (9)
The wedges (7) to the backsides of both ends. Here, the outer diameter of the pressure rod (R1) of this hydraulic ram (R) is
It is slightly smaller than the inner diameter of (5d) and slidable in the through hole (5d), and is larger than the inner diameter of the bolt hole (7a) of the wedge (7). And these hydraulic rams
Hydraulic pressure is supplied to the (R) from the above hydraulic supply device for synchronous operation, and the wedge (7) is pressed by the pressing force of these hydraulic rams (R).
Forcibly lift the swing jaw plate
(4) Remove the bite after canceling the bite.

In this way, the swing jaw plate
In this example, the wedge (6) that fixed (4) was removed.In this example, even when the wedge (7) was hit and deformed by the crushed rough stone, even if the wedge (7) bites into the swing jaw plate (4), The wedge (7) can be lifted up in parallel by the pressing force from the back surface side by the two hydraulic rams (R) without welding the frame-shaped jig unlike the technique, and can be efficiently removed. In addition, since a relatively large space is secured at the rear part of the swing jaw body (5) of the jaw crusher for inspecting and maintaining the drive mechanism of the swing jaw body (5), the hydraulic pressure at the rear part of Lamb
(R) can be loaded and unloaded with good workability.

[0025]

As described above, according to the method of the present invention, even when the jaw plate fixing wedge of the jaw crusher is hit by the rough rock to be crushed and deformed and bites into the jaw plate, The frame jig or the like can be easily lifted and removed without welding, so that the work efficiency of reversing or replacing the jaw plate can be improved, and the productivity of the jaw crusher can be improved.

[Brief description of drawings]

FIG. 1 is an explanatory diagram of a schematic configuration of a jaw crusher and a method for removing a wedge for fixing the jaw plate thereof according to an embodiment of the present invention, in which (a) is a front sectional view showing the schematic configuration, and (b) is a diagram. (a) Partial view taken along the line AA of FIG.
FIG. 7C is an explanatory diagram of a method for removing the wedge.

FIG. 2 is an explanatory view of a configuration of a typical example of a conventional jaw crusher and a method for removing the wedge for fixing the jaw plate, (a) is a front sectional view showing a schematic configuration,
Figures (b) and (b) are explanatory views of a method for removing the wedge.

[Explanation of symbols]

(1) --Crusher body, (2) --Front wall, (2a)-Fixed protrusion, (2b)-Engagement support protrusion, (2c)-Fastening fixed seat, (3)- -Fixed jaw plate, (4)-Swing jaw plate,
(5) --Swing jaw body, (5a)-Front plate, (5b)-Fixed protrusion, (5c)-Engagement support protrusion, (5d)-Through hole, (5e)- Fastening fixed seat, (6) --Wedge, (6a)-Ram loading section, (7) --Wedge, (7a)-Bolt hole, (8) --Mounting bolt, (9) --Mounting Bolt, (10)-Filling material, (R) --Hydraulic ram, (R1)-
Push rod.

Claims (3)

[Claims] 1. An upper end surface of a fixed jaw plate, whose lower end is engaged and supported by an inner lower portion of a front wall of a jaw crusher main body, and which is disposed on an inner surface of the front wall, and an upper inner portion of the front wall. A wedge that is fitted in a wedge shape between the fixed projection and the front wall is fastened to the front wall via a plurality of mounting bolts to fix the wedge to the front wall. A method for removing a wedge for fixing a jaw plate, which is to be removed at the time of inversion or replacement of a plate, wherein the wedge is provided with a ram charging section in which a rear surface portion on both sides of the front wall is cut out in a square shape. When removing the wedge, the hydraulic rams are loaded and arranged in the ram loading portions to operate synchronously, and the wedges are lifted and removed by the pressing force of the hydraulic rams. How to remove the wedge for fixing the jaw plate. 2. A filling member for preventing crushed powder intrusion is removably filled in the ram charging portion, and when the wedge is removed, the filling member is attached to the ram charging portion of the hydraulic ram. The method of removing a wedge for fixing a jaw plate according to claim 1, wherein the wedge is fixed prior to the charging arrangement. 3. A swing jaw plate of a jaw crusher, the lower end of which is engaged with and supported by a lower portion of a front surface of a swing jaw main body, the upper end surface of the swing jaw plate being disposed on the front surface of the main body, and a fixed projection portion provided on a lower portion of the front surface of the main body. The swing jaw is fitted in a wedge shape, and is fastened to a fastening and fixing seat provided at the rear portion of the swing jaw body through a plurality of mounting bolts arranged through through holes provided in the front side plate of the swing jaw body. A method of removing a wedge for fixing a jaw plate to the swing jaw main body, which is to be removed when the swing jaw plate is inverted or replaced, wherein the wedge was fastened when the wedge was removed. Remove the mounting bolts located on both outer sides of the mounting bolts, and remove the A hydraulic ram is arranged between the front side plate of the ing jaw body and the rear fastening and fixing seat, and the tip of the ram is brought into contact with the rear surface of the wedge through the through hole after the mounting bolt is pulled out for synchronous operation. A method for removing a wedge for fixing a jaw plate, characterized in that the wedge is lifted up by the pressing force of the hydraulic ram and removed.