KR20040017709A - Rod for braker - Google Patents

Abstract

PURPOSE: A detachable rod for a breaker is provided to expand the life span of the rod, the breaker, and an excavator by reducing the wear of a pointed unit of the rod, to improve working efficiency by quickly and easily replacing the pointed unit when the pointed unit is worn out, and to maximally reduce cost for the expendable rod by replacing only the front end of the rod. CONSTITUTION: A detachable rod(10) for a breaker is composed of a rod unit(11) mounted to the breaker; a front end unit(12) detachably combined to the outer front end of the rod unit by a combining device to form the outer front end of the rod; and a pointed unit(13) of high hardness attached and installed to the end of the front end unit. The combining device comprises a bolt and a nut formed at the rod unit and the front end unit, respectively; a spring washer(22) inserted between the rod unit and the front end unit; holes formed at the sides of the bolt and the nut to communicate each other in combining the rod unit and the front end unit; and a combining pin(25) penetrated and installed to the hole.

Description

Removable rod for breaker {Rod for braker}

The present invention relates to a breaker used for installation in heavy equipment, and more particularly to a removable rod for a breaker mounted on the breaker.

Generally, a breaker widely used as a crushing equipment in construction and civil works is used to crush rock, concrete, asphalt, etc. by using a hydraulic source of the equipment mounted on mobile equipment such as an excavator.

Such a breaker is generally provided with a hydraulic cylinder that is hydraulically stretched inside the body and supplies a hydraulic pressure controlled by the valve to a plurality of chambers formed in the hydraulic cylinder, thereby causing the piston rod to reciprocate at high speed, The piston rod has a structure in which a rod for performing a crushing operation is installed at the tip.

Therefore, the impact force generated when the front end of the reciprocating piston rod collides with the inner end of the rod is transmitted to the to-be-destructed object such as rock through the end of the rod directly contacting the rod and the to-be-disturbed object to crush the to-be-destructed object.

In this case, the rod that transmits the impact force of the cylinder has a disadvantage that the attachment directly contacting the to-be-destructed body is gradually worn out as the use time increases, and more particularly, when the hard material such as rock is crushed.

When the attachment of the rod is worn in this way, the centering work of the attachment is difficult when the rock is excavated, and the excavation of only the desired part becomes difficult, and the amount of impact transmitted to the main body by the reaction force during the excavation becomes larger than when the attachment is not worn. This shortens the life of the breaker or excavator equipped with the breaker.

Therefore, conventionally, worn rods are removed from the breaker, the attachment is sharpened with a grinder, heat treated, and reused. This operation takes a lot of time and effort to reduce work efficiency, and the reprocessed rod is also attached by using several times. Is again worn or severe, there is a problem that the heat-treated part is crushed and cut, and in order to continue the work, it is necessary to have a plurality of spare rods to continue the crushing work while repairing the rod, and according to the purchase of expensive equipment rod Economic losses will occur.

In addition, the above-described conventional rod has a disadvantage in that the whole can not be used even if the rest of the rod is usable when the attachment is crushed and cut by expensive equipment having a length of 80-100 cm and a weight of 50-60 kg. .

Accordingly, the present invention has been made to solve the above-mentioned problems, the object of the present invention is to provide a breaker detachable rod for improving the strength of the rod attachment to lower the wear rate and extend the life.

In addition, the present invention is another object to provide a removable rod for the breaker to be able to reuse the rod only by replacing the attachment by making it possible to replace the attachment from the rod.

1 is a perspective view showing a removable rod for a breaker according to the present invention,

2 is a cross-sectional view showing an assembled state of the rod according to the present invention;

Figure 3 is a perspective view showing a fastening means of the rod according to another embodiment of the present invention.

Explanation of symbols on the main parts of the drawings

10: rod 11: rod part

12: tip 13: attached

20: female thread 21: male thread

22: spring washer 23,24,33,34: hole

25,35: Fastening pin 30: Square block

31: Flange 32: Insertion groove

In order to achieve the object as described above, the rod of the present invention, the rod portion is installed on the breaker and the front end portion that is detachably coupled to the outer end of the rod portion by means of fastening means to form the outer end of the rod, the end of the end portion It is made to include the attachment of high hardness to be attached to.

The fastening means for attaching and detaching the rod portion and the tip portion is not particularly limited except that the rod portion should be fastened without any gaps or flows to prevent vibration due to impact during the breaker operation.

To this end, the fastening means are formed in each of the rod portion and the tip portion, a pair of male and female screws, a spring washer inserted between the rod portion and the tip portion, and a fastening pin penetrating the rod portion and the tip portion to prevent rotation of the tip portion. It may include.

The male screw and the female screw may be used in the form of a triangular shape or an arc of the thread, and preferably a square screw having a rectangular shape is used.

In addition, the rod portion and the tip portion is made of a conventional steel material, the attachment is preferably made of a special material steel having a high hardness, such as high carbon steel or cemented carbide.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a perspective view showing a removable rod for a breaker according to the present invention, Figure 2 is a cross-sectional view showing the assembled state of the rod according to the present invention.

According to the above-described drawings, the rod 10 of the present invention has a rod portion 11, one end of which is installed inside the body of the breaker 50, and a fastening means connected to the outer end of the rod portion 11. It includes a front end portion 12 that is detachably installed to form the front end of the rod 10, and the cemented carbide material attachment 13 is attached to the end of the front end portion 12.

The tip portion 12 and the attachment 13 are joined by welding or the like, and have a conical shape and a smoothly connected structure as a whole. As for the method of welding the distal end portion 12 and the attachment 13, which is a release material, a conventional method such as friction welding is used, and thus the description thereof will be omitted.

The attachment 13 may be used in addition to cemented carbide material, high hardness special steel, such as high carbon steel, and the industrial diamond can be further attached to the surface.

Looking at the fastening means for fastening the front end portion 12 and the rod portion 11, the inner end of the front end portion 12, that is, the opposite side of the attachment 13, the internal thread having a thread of a rectangular cross section inwardly ) Is processed and a male screw 21 having a threaded section having a square cross-section that is engaged with the female screw 20 is formed at the tip of the rod portion 11 so as to be screwed together.

In addition, a spring washer 22 fitted to the male screw 21 is installed between the rod portion 11 and the tip portion 12 to push the rod portion 11 and the tip portion 12 elastically so that the female screw 20 is provided. And confidentiality between the male screw 21 is further maintained.

In addition, the tip portion 12 is provided at the side of the male screw 21 and the female screw 20 of the rod part 11 and the tip part 12 so as to prevent the female screw 20 from being released from the male screw 21. Holes 23 and 24 penetrating through the center are formed to communicate with the female screw 20 and the male screw 21 in a state where it is completely fastened to (11), and the fastening pin 25 is formed through the holes 23 and 24. It is a structure to be inserted.

Therefore, the rotation of the female screw 20 and the male screw 21 is controlled by the fastening pin 25 to prevent the tip portion 12 from being released from the rod portion 11.

In this case, the fastening pin 25 forms a hook hook for hooking at one end so that it can be easily withdrawn from the hole.

Meanwhile, according to another embodiment of the present invention, as shown in FIG. 3, the fastening means includes a square block 30 formed at the front end of the rod part 11 and an outer side of the square block 30. Protruding into the horizontal flange 31, the square block 30 and the insertion groove 32, the square block 30 is formed to be cut inward from the side of the front end portion 12 so that the flange 31 is inserted; Holes 33 and 34 communicating with the side surfaces of the insertion grooves 32 and fastening pins 35 to be inserted into the holes 33 and 34 to fix the tip portion 12 to the rod portion 11.

According to the fastening means, when the flange 31 integrally formed in the square block 30 and the square block 30 is fitted into the insertion groove 32 cut to the side of the tip portion 12, the flange 31 is inserted into the insertion groove. It is caught by the (32), it is possible to prevent the tip portion 12 from being separated in the axial direction from the rod portion (11).

In addition, the fastening pin 35 is for preventing the square block 30 from being separated from the insertion groove 32 along the insertion direction. For this purpose, the holes 33 and 34 are formed in the square block 30 and the insertion direction. It is formed at a different angle and preferably at right angles to the insertion direction of the square block 30.

Therefore, when the square block 30 at the bottom of the rod 11 is fully inserted into the insertion groove 32 of the tip portion 12 cut to one side, the hole 33 and the insertion groove 32 formed in the square block 30 are completely inserted. The holes 34 formed therein are in communication with each other, and the rod part and the tip part can be assembled by inserting the fastening pin through the hole, and the tip part can be easily removed from the rod part through the reverse order of the assembly process. will be.

Hereinafter will be described the operation of the present invention.

The rod part 11 constituting the rod 10 of the present invention is mounted to the breaker 50, and a tip end portion 12 to which the attachment 13 is welded is detachably installed at the outer end thereof.

That is, the operator inserts the female screw 20 formed in the tip portion 12 with the male screw 21 formed at the outer end of the rod portion 11 and screwes the tip portion 12 in one direction to screw the tip portion to the rod portion 11. Assemble (12). At this time, the spring washer 22 is fitted to the male screw 21 and is installed between the rod portion 11 and the tip portion 12.

When the tip portion 12 is completely screwed into the rod portion 11, the hole 23 formed in the rod portion 11 and the hole 24 formed in the tip portion 12 coincide with each other and penetrate the center of the rod 10. To communicate in a single hole.

Therefore, the operator can complete the assembly of the tip portion 12 to the rod portion 11 by fitting the fastening pin 25 through the holes (23, 24).

As such, when the rod 10 is assembled, the breaker 50 may be operated to place the attachment 13 attached to the tip portion 12 at a desired fracture point to perform a fracture operation such as rock.

Here, the attachment 13 attached to the tip portion 12 is made of a high hardness material, unlike the tip portion 12 or the rod portion 11, it is possible to reduce the amount of wear as possible.

On the other hand, if the attachment 13 is worn to some extent as the rod 10 continues to be used, the operation may be continued by newly replacing only the tip portion 12 in the rod portion 11.

To replace the tip part 12, first, the fastening pin 25 inserted into the holes 23 and 24 is removed, and the screw 12 is screwed by rotating the tip part 12 from the rod part 11 using a jig. By releasing the 21 and the female screw 20, the tip portion 12 can be easily removed from the rod portion 11.

When the used tip 12 is removed in this way, the new tip 12 is screwed into the rod 11 and the replacement is completed by inserting the fastening pin 25 through the holes 23 and 24.

It can be seen that the present invention provides a breaker rod having a significantly innovative function as described above. While exemplary embodiments of the present invention have been shown and described, various modifications and other embodiments may be made by those skilled in the art. Such modifications and other embodiments are all considered and included in the appended claims, without departing from the true spirit and scope of the invention.

According to the removable rod for a breaker according to the present invention as described above, it is possible to reduce the attachment wear of the rod to extend the life of the rod and the life of the breaker or excavator, so that the replacement can be carried out quickly and easily in the case of attachment wear Can improve the work efficiency.

In addition, by replacing only the tip of the rod, it is possible to reduce the cost of the rod, which is a consumable, as much as possible, thereby reducing costs.

Claims (6)

A rod part installed in the breaker, A front end portion detachably coupled to the outer end of the rod by a fastening means to form an outer end of the rod, A detachable rod for a breaker comprising a high hardness attachment is attached to the end of the tip. According to claim 1, wherein the fastening means are formed in each of the rod portion and the tip end of the pair of male and female screws, a spring washer inserted between the rod portion and the tip portion and the male and female threads formed on the side of the rod portion and the tip portion Removable rod for a breaker, characterized in that it comprises a hole in communication with each other when fastening, fastening pins installed through the hole. According to claim 1, wherein the fastening means is a square block formed at the front end of the rod portion, a flange protruding outwardly horizontally formed on the side of the square block, the square block and the inner side from the side of the front end portion so that the flange is inserted Removable rod for a breaker comprising a notched insertion groove, a hole formed in communication with the side of the square block and the insertion groove and a fastening pin fitted to the hole. 3. The removable rod for a breaker according to claim 2, wherein the male screw and the female screw are square screws having a square thread. The breaker of claim 1, wherein the attachment is made of high hardness steel such as high carbon steel or cemented carbide. 6. The removable rod of claim 5, wherein the attachment further includes an industrial diamond attached to a surface thereof.