JPS6042152Y2 - Wedge-shaped rock crusher - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a wedge-shaped rock crusher that crushes rock by inserting a wedge into a hole in the rock.

Conventionally, as shown in Figure 1, this type of crusher inserts a pair of guides a, a into a hole B in rock A, and inserts a wedge between the pair of guides a, a using a hydraulic cylinder C. A device is known in which the rock A is broken by generating a strong force (rock breaking force) N in the direction of (penetration) and tearing the rock A through a guide.

F is the penetration force. However, a wedge a is connected to a pair of guides b,
When penetrating between wedges b, frictional resistance occurs in the sliding part between wedge a and guide b, and the penetration force F is reduced by the frictional resistance and cannot be effectively used as rock-breaking force N, making it impossible to obtain a large rock-breaking force N. It has the following defects.

In addition, grease (molybdenum disulfide paste, etc.) is applied to the sliding parts to lubricate them and reduce the friction coefficient of the sliding parts, thereby reducing frictional resistance.
1. Glue must be applied by hand to guide b, which reduces work efficiency, and if the rock has a large resistance to breaking, the surface pressure on the sliding part (wedge surface) increases, resulting in galling.

Once galling occurs, the rock-splitting force against the penetration force cannot be increased, which is undesirable.

The present invention was developed in view of the above circumstances, and its purpose is to reduce the friction coefficient of the sliding part between the wedge and the guide, thereby reducing the frictional resistance when the wedge penetrates, and to reduce the need for lubricant for each operation. To provide a wedge-shaped rock crusher that does not require coating.

Hereinafter, embodiments of the present invention will be described with reference to FIG. 2 and subsequent figures.

FIG. 2 is an overall front view, and the cylinder 1 is a cylindrical main body 2.
It has a structure in which a piston 4 having a piston rod 3 is slidably inserted therein to form a lowering chamber 5 and a raising chamber 6.

A mounting plate 7 is fastened to the lower end surface 2a of the main body 2 with bolts 8. A pair of vertical pieces 9, 9 are welded and fixed to the mounting plate 7, and the pair of vertical pieces 9, 9 have a circular arc shape. Notch 10,1
0 are formed to face each other, and the piston rod 3 passes through the hole 11 of the mounting plate 7, contacts the pair of notches 10, 10 in a slidable manner, and protrudes below the vertical piece 9.

A wedge 12 is attached to a flange 13 on the lower end surface 3a of the piston rod 3.
are connected by bolts 14 through the piston rod lower end surface 3a.
A projecting piece 15 and a groove 16 that fit into each other are formed at the center position of the piston rod 3 and the center position of the wedge upper end surface 12a, so that the piston rod 3 and the wedge 12 can be connected concentrically.

Reference numeral 17 is a recess for locking a tool for rotating the piston rod 3.

The wedge 12 has downwardly tapered tapered surfaces 18.18 on both sides.
It has a structure in which unit wedge pieces 19 are continuously formed, and a pair of guides 20,
20' is arranged.

The guides 20 are formed by connecting a unit wedge side surface 18 which is a tapered surface and an inner surface 21 which is a tapered surface having the same angle, and a pair of depressions 22 are provided at the upper ends of the pair of guides 20. 22 are fixed by welding.

In other words, notches 23 having the same shape as the cross section of the guide 20 are formed in the block 22, and each guide 20 is fixed to each notch 23 by welding.

Connecting members 24 made of an elastic material such as a spring plate are connected to each of the vertical pieces 9 and each block 22 to connect the guide 20 and the cylinder 1.

Further, the lower end surfaces and both side surfaces of the pair of brackets 22, 22 are coated with a rubber material 25, and are fixedly tightened with bolts 27 via a presser piece 26.

As shown in FIG. 6, a groove 21a is formed in the inner tapered surface 21 of the pair of guides 20, 20'.
Plates 28 made of a low-friction material are fitted into each of the plates 1a to reduce sliding resistance with the wedge 12.

The low-friction material may be a plastic material such as a synthetic resin or a high molecular weight resin, or a metal material containing these materials and subjected to a low-friction treatment.

21b is a hole into which a plate extrusion tool is inserted.

Further, the pair of guides 20, 20' are structured as shown in FIG.

One guide 20 has a pair of protruding walls 31 and 31 on both sides of a main body 30 having an inner tapered surface 21 and an arcuate outer surface 29, and the other guide 20'
The other guide 20' has a pair of protruding walls 33, 33 integrally formed on both sides of a main body 32' having an inner tapered surface 21 and an arcuate outer surface 32. The cross section is U-shaped, with a protruding wall 3
The pair of guides 20, 20' are connected in an annular manner with the inner surface 33a of the projection wall 31 in contact with the outer surface 31a of the projecting wall 31, and the wedge 12 is inserted into the inner surface 33a of the wedge 12 so that the outer surface 31a of the protruding wall 31 contacts the inner surface 33a of the projection wall 31. 19a, 19a are in contact with the pair of protruding wall inner surfaces 31b.

Further, a sealing material 3 such as rubber is provided on the pair of protruding wall end surfaces 33b.
4 is fixed in the longitudinal direction with screws 35, and the sealing material 3
A pair of guides 20,
20' is sealed.

Further, the tip portions 20, . 2
0'A has a small diameter with the slope 36 as the boundary, as shown in FIG.
A presser plate 39 is fixed to the inner surface 21 of the lower end of one of the guides 20, and is located opposite to the bottom plate 38 with a gap between the presser plate 39 and the bottom plate 38. A sealing material 40 such as rubber is provided in a crimped state to seal the lower fitting portions of the pair of guides 20, 20'.

Because of this, the insides of the pair of guides 20, 20' are reliably sealed, and lubricating fluid is injected into the insides.

Therefore, when the piston rod 3 of the cylinder 1 is extended, the wedge 1
2, the tapered surfaces 18, 18 on both sides slide along a pre 28 made of a low-friction material as shown in FIG. 9, and the pair of guides 20, 20' are laterally spread apart to generate a rock-splitting force N. Therefore, it can crush rock.

In addition, since the sliding part between the wedge 12 and the guides 20, 20' is made of a plate 28 made of a low-friction material, the coefficient of friction is reduced, reducing the frictional resistance when the wedge penetrates, and effectively reducing the penetration force F. It can be used as power.

Therefore, a large rock-splitting force can be obtained.

Furthermore, there is no need to apply a lubricant such as grease for each crushing operation, which simplifies the operation and prevents galling even if the rock breaking resistance becomes large.

Also, since it is only necessary to replace the plate 28, the guide 20
, 20 do not need to be replaced, resulting in lower cost.

When removing the plate 28, a tool may be inserted through the hole 21b and the plate 28 may be pushed out.

In addition, as shown in FIG. 10, the plate 28 has a recess 28a.
If the lubricant is stored in that part, the recess 28a becomes an oil sump, and when a high surface pressure is applied to the plate 28 when the plate 12 is penetrated, the oil sump 28a deforms as shown by the tenth imaginary line. The lubricating oil inside is pushed out and flows out to the sliding parts.

Note that when the rice cake 12 is removed and the surface pressure is removed, the plate 28 elastically returns to its original state, and the lubricating oil that has flowed out flows into the recess 28.
Return to inside a.

Therefore, the lubricating oil is automatically pumped (outflow and return action) in the recess 28a according to changes in surface pressure, and the sliding parts can be lubricated without providing a special oil supply mechanism.
In other words, friction work can be minimized even under large rock-splitting forces.

As shown in FIG. 11, if a wedge surface 21'a is formed in the groove 21a of the guide 20 so that when the plate 28 is elastically deformed, the plate 28 protrudes and locks onto the wedge surface 21'a. This is preferable because the installation strength under high surfaces is strong.

Further, as shown in FIGS. 12 and 13, a recess 118a may be formed on both tapered surfaces 18 of the wedge 12, and the plate 2 may be attached to this recess R18a.

In addition, as shown in FIGS. 14 and 15, the guide 20.2
The inner surface 21 of 0' may be a parallel surface, and the plate 28 may be attached to this inner surface.

In this way, the guide 20 can be easily processed.

As shown in FIGS. 16 and 17, the plate 28 may have a resin surface plate 28C stretched and fixed to a metal back plate 28b, and a number of recesses 28a formed on the surface thereof.

The present invention is as described above, with wedge 12 and guide 20.20'
By reducing the friction coefficient of the sliding part with the wedge, it is possible to reduce the frictional resistance when the wedge penetrates.

Therefore, penetration force can be effectively used as rock breaking force,
You can obtain a large amount of rock-splitting power.

Further, there is no need to apply lubricant every time the crushing operation is performed, making the operation easier.

[Brief explanation of the drawing]

Fig. 1 is a diagram explaining the principle, Fig. 2 is an overall front view showing an embodiment of the present invention, Fig. 3 is a side view, Fig. 4 is a sectional view taken along the ■-IV line, and Fig. 5 is a sectional view taken along the ■-■ line. Figure 6 is a vertical cross-sectional view of the wedge and guide, Figure 7 is a cross-sectional view along the line ■-■, Figure 8 is a detailed view of the ■ part,
Fig. 9 is an explanatory diagram of the operation, Fig. 10 is a sectional view showing another example of the plate, Fig. 11 is a sectional view showing another example of plate attachment, and Fig. 12 is a schematic longitudinal sectional view of the second embodiment. , FIG. 13 is a cross-sectional view of this, FIG. 14 is a vertical cross-sectional view of the third embodiment, and FIG.
FIG. 5 is a bottom view of this plate, FIG. 16 is a sectional view showing another example of the plate, and FIG. 17 is a front view. 12 is a wedge, 18 is a tapered surface on both sides, 20 and 20' are guides, 21 is an inner tapered surface, and 28 is a plate.

Claims (1)

[Scope of utility model registration request] Guides 20° 20' having an inner tapered surface 21 are arranged on both sides of the wedge 12 having tapered surfaces 18, 18 on both sides, and the wedge piece 12 is inserted between the guides 20, 20' and pushed apart to crush it. In the crusher configured to
A wedge-shaped rock crusher characterized in that a plate 28 made of a low-friction material is provided at the sliding portion between the guide 2 and the guides 20, 20'.