JP3027077U - Breaker chisel - Google Patents

Abstract

(57) [Abstract] [Problem] When excavating deeply or breaking rock in a deep place, it is possible to prevent a part of the lateral edge of the breaker to which the chisel is attached from hitting the corner of the upper surface of the excavation site, and to make it deep. Allows you to drill and destroy deep rocks. A lateral width of a cutting edge side 2 of a chisel 1 attached to a breaker a is formed to be wide, and both lateral ends 2c, 2c of the cutting edge side 2 are positioned at both lateral ends c, c of the breaker a in the lateral width direction. It protruded to the outside respectively.

Description

[Detailed description of the device]

[0001]

[Technical field to which the device belongs]

 The present invention relates to a breaker technology used for various kinds of breaking, crushing, and excavating work such as rock breaking, road and building breaking, crushing, and hard earth and sand excavation. The present invention relates to a breaker chisel in which the width of the edge of a chisel for directly breaking and crushing rocks or excavating earth and sand is wider than that of the breaker.

[0002]

[Prior art]

 Conventionally, breakers are used for various types of destruction, crushing and excavation work such as rock destruction, road and building destruction, crushing, and hard sand excavation. The breaker is usually used by mounting it on the arm of a hydraulic excavator. It uses a hydraulic power as a power source to reciprocate a built-in piston up and down at high speed, and the falling piston strikes the rear end of the chisel to cause a chisel. The structure is such that rocks, etc. are destroyed, crushed, and hard soil is excavated at the cutting edge side.

A chisel attached to a breaker generally has a cylindrical shape with a circular cross section, and its cutting edge side is sharp or rounded, and the lateral width of the chisel on the cutting edge side is the chisel. It is smaller than the width of the breaker to be installed.

[0004]

[Problems to be solved by the device]

 However, as mentioned above, the width of the edge of the chisel on the cutting edge side is smaller than the width of the breaker to which the chisel is mounted, so as shown in Fig. 4, when deeply excavating hard earth and sand or breaking rocks in deep places, However, a part of the lateral side edge c of the breaker a to which the chisel b is attached hits the corner of the upper surface of the excavation site, and hard sand cannot be excavated, or rocks at a deep site cannot be destroyed.

The present invention has been made in view of the above problems in order to solve the problems. The purpose of the present invention is to deeply excavate or destroy rocks in deep places. To provide a breaker chisel that can prevent deep excavation and rock destruction in deep places by preventing a part of the lateral side edge of the breaker to which the chisel is attached from hitting the corner of the upper surface of the excavation site. is there.

[0006]

[Means for Solving the Problems]

 In order to achieve the above object, the invention of claim 1 comprises means for forming the width of the chisel attached to the breaker on the cutting edge side to be wider than the width of the breaker.

According to the second aspect of the present invention, the width of the chisel attached to the breaker on the blade edge side is formed to be wide, and both ends of the blade edge side in the width direction are set to be wider than both lateral ends of the breaker. It is composed of means protruding to the outside.

According to a third aspect of the present invention, the width of the chisel attached to the breaker on the blade edge side is formed to be wide, and both lateral ends of the blade edge side are defined to be wider than both lateral ends of the breaker. The cross section of the chisel of the rear end and the rear part that protrudes outside and is inserted and retained in the lower part of the breaker and the part of the protrusion that protrudes downward from the breaker is formed in a circular shape, and the breakers are formed on both sides of the rear part. The blade edge side is formed integrally with the tip of the protrusion with a circular cross section that protrudes downward from the breaker, and the lateral width of the blade edge side is connected to the protrusion of the chisel. The width of the base end is slightly wider than the diameter of the circular protrusion, and the left and right ends in the width direction of the base end on the cutting edge side extend slightly parallel to the cutting edge of the tip, and from there Inclined to both sides While expanding, the left and right lateral width directions are parallel again to form left and right side edges, and the left and right side edges are extended in parallel to the tip edge, and the thickness on the edge side is , The diameter of the protrusion of the chisel at the base end that connects to the protrusion is the same, and the left and right side ends in the widthwise direction spread out to both the left and right sides and toward the blade tip from the tip to the tip of the tip. The front and rear surfaces in the thickness direction are reduced in a straight line toward the front and back, and the front and rear surfaces in the thickness direction coincide and are sharpened at the tip of the tip.

[0009]

[Embodiment of device]

 Hereinafter, the present invention will be described more specifically based on the embodiments of the invention described in the drawings. Here, Fig. 1 is a perspective view of the breaker chisel, Fig. 2 (A) is a front view of the breaker chisel, Fig. 2 (B) is a side view of the breaker chisel, and Fig. 3 is a sectional view at the time of excavation. is there.

In the figure, a breaker a is usually used by being attached to an arm of, for example, a hydraulic shovel or a pneumatic shovel (not shown), and a piston (not shown) that reciprocates up and down at high speed by using hydraulic or pneumatic pressure as a power source is normally used. Is built in. Below the piston of the breaker a, a rear portion 1b side of a chisel 1 described later is inserted and mounted.

The breaker a reciprocates a built-in piston, for example, using hydraulic pressure or air pressure as power, up and down at high speed, and strikes a rear end portion 1 a of the chisel 1 described later with the descending piston to strike the rear end 1 a of the chisel 1. It has a structure in which rocks, etc. are destroyed and crushed at the cutting edge side 2 and hard soil is excavated.

The chisel 1 has a rear end 1a and a rear portion 1b, which are inserted and retained in the lower portion of the breaker a, and a projecting portion 1c protruding downward from the breaker a, whose cross section is the same as the conventional one. It is formed in a circular shape. A throttle portion 1d held by the breaker a is formed on both sides of the rear portion 1b which is inserted into the breaker a. The throttle portion 1d may be formed on only one side of the rear portion 1b depending on the model.

A wide cutting edge side 2 is integrally formed at the tip of a protrusion 1c having a circular cross section that protrudes downward from the breaker a. The cutting edge side 2 is a portion where rocks and the like are directly destroyed and crushed, and hard earth and sand are directly excavated.

The lateral width of the cutting edge side 2 of the chisel 1 is wider than the lateral width of the breaker a on which the chisel 1 is mounted. The left and right side ends 2c, 2c of the lateral edge 2 of the chisel 1 project to the outside from the lateral left and right ends c, c of the breaker a, respectively.

Therefore, when the left and right side surfaces of the excavation hole are vertical, even if the lateral width side ends 2c, 2c of the cutting edge side 2 having a wide lateral width hit the excavation side surface, the lateral width side end c of the breaker a. , C does not hit, and therefore, the lateral side edges c, c of the breaker a hit the corner of the excavation upper surface, and can prevent the excavation by the chisel 1 from being hindered.

The lateral width of the chisel 1 on the cutting edge side 2 is such that the base end portion 2a connected to the projecting portion 1c is slightly wider than the diameter of the circular projecting portion 1c. The left and right ends of the base end portion 2a of the cutting edge side 2 which is slightly wider than the diameter in the lateral width direction extend a little parallel to the cutting edge 2b at the tip, and incline to the left and right sides and toward the cutting edge from there. While expanding, the left and right lateral width directions ahead of which are formed parallel left and right side edges 2c, 2c. The left and right ends 2c, 2c extend in parallel to the cutting edge 2b at the tip thereof.

The thickness of the cutting edge side 2 is the same as the diameter of the protruding portion 1c at the base end portion 2a connected to the protruding portion 1c, and the left and right side ends in the lateral width direction are inclined to the left and right sides. While the front and rear surfaces in the thickness direction are linearly inclined from the expanded portion toward the blade tip 2b at the tip end, the front and rear surfaces in the thickness direction are coincidently pointed at the tip blade tip 2b.

Next, the operation based on the configuration of the embodiment of the invention will be described below. For example, the rear portion 1b side of the chisel 1 formed with the lateral blade edge side 2 is inserted into a breaker a attached to an arm of a hydraulic excavator or a pneumatic excavator (not shown).

In this case, the lateral width direction of the cutting edge side 2 is fitted so as to match the lateral width direction of the breaker a. As a result, both lateral ends 2c, 2c of the chisel 1 on the cutting edge side 2 project outward from both lateral ends c, c of the breaker a.

In this way, after mounting the chisel 1 having the lateral edge 2 formed on the breaker a, for example, a hydraulic shovel or a pneumatic shovel (not shown) is driven to start excavation of hard soil. The chisel 1 mounted on the breaker a reciprocates up and down at high speed, and excavation is performed while breaking the hard soil on the blade edge side 2 of the chisel 1.

Then, when the excavation is continued and the depth of the excavation becomes the same as the protruding length of the chisel 1 and the cutting edge side 2 protruding from the lower surface of the breaker a, the side end surface of the excavation hole is excavated. At this time, in the conventional case, the side end c of the breaker a hits the corner of the upper surface of the excavation hole, and the side end face cannot be excavated.

On the other hand, in this invention, both lateral ends 2c, 2c of the chisel 1 on the cutting edge side 2 project outward from both lateral ends c, c of the breaker a, respectively. Therefore, when the depth of excavation is the same as the protruding length of the chisel 1 and the cutting edge side 2 protruding from the lower surface of the breaker a, when the side end surface of the excavation hole is excavated, the side end c of the breaker a is It is possible to continue the excavation without hitting the corner of the upper surface of the excavation hole, and it becomes possible to excavate a hole deeper than the protruding length of the chisel 1 and the cutting edge side 2.

The invention is not limited to the above-described embodiments of the invention, and it goes without saying that various modifications can be made without departing from the spirit of the invention.

[0024]

[Effect of device]

 As is clear from the above description, according to the breaker chisel according to the inventions of claims 1, 2 and 3, the rock of a chisel protruding from the lower surface of the breaker and a rock at a deeper portion than the protruding length of the cutting edge side is excavated. In the case of breaking the chisel, it is possible to prevent a part of the lateral edge of the breaker to which the chisel is attached from hitting the corner of the upper surface of the excavation site, which allows the chisel to go deeper without replacing it with a longer one. It is possible to excavate or destroy rocks in deeper areas, increasing the work efficiency.

In addition to the above effects, the left and right ends of the base end portion on the cutting edge side in the lateral width direction extend a little parallel to the cutting edge of the tip, and from there, Since it spreads to both the left and right sides and inclines toward the cutting edge, even if part of dust or earth and sand generated during excavation or rock destruction tries to adhere to the expanding both ends of the cutting edge. Since it is inclined, it is necessary to prevent some dust or earth and sand from sliding down this inclined portion and dropping downward, and attaching some of the dust or earth and sand to both ends of the cutting edge that are widening. You can

[Brief description of drawings]

FIG. 1 is a perspective view of a breaker chisel showing an embodiment of the present invention.

FIG. 2A is a front view of a breaker chisel showing an embodiment of the present invention. (B) is a side view of a breaker chisel showing an embodiment of the present invention.

FIG. 3 is a cross-sectional view at the time of excavation showing an embodiment of the present invention.

FIG. 4 is a cross-sectional view of conventional excavation.

[Explanation of symbols]

 1 Chisel 1a Rear end part 1b Rear part 1c Projection part 1d Drawing part 2 Blade tip side 2a Base end part 2b Blade tip 2c Side end a Breaker b Conventional chisel c side end

Claims (3)

[Scope of utility model registration request] 1. A breaker chisel characterized in that a lateral width of a chisel attached to a breaker on a cutting edge side is wider than a lateral width of the breaker. 2. The chisel mounted on the breaker has a wide width on the blade edge side, and both ends of the blade edge side in the lateral width direction are projected outward from both lateral ends of the breaker. A breaker chisel. 3. A lateral width on the blade edge side of a chisel attached to the breaker is formed to be wide, and both lateral ends of the blade edge side in the lateral width direction are projected outward from both lateral end portions of the breaker, respectively, to the lower portion of the breaker. A circular cross-section is formed on each of the rear end portion and the rear portion of the chisel that is inserted and retained, and the protrusion portion that protrudes downward from the breaker, and the throttle portions that are retained by the breaker are formed on both side surfaces of the rear portion. At the tip of the protruding portion having a circular cross section that protrudes downward from the breaker, the wide blade edge side is integrally formed, and the lateral width of the blade edge side is such that the base end portion that connects to the protruding portion of the chisel has a circular protrusion portion. Make the width slightly wider than the diameter, and the left and right side ends of the base end portion on the cutting edge side in the lateral width direction extend a little in parallel toward the cutting edge of the tip, while inclining to the left and right sides and toward the cutting edge. Expand, The left and right lateral width directions at the tip of the tip again form parallel left and right edges, and the left and right edges are extended in parallel to the cutting edge of the tip, and the thickness on the cutting edge side is connected to the protrusion. The diameter of the protrusion of the chisel is the same at the base end, and the front and rear surfaces in the thickness direction are straight from the point where the left and right ends in the lateral width direction expand while tilting to the left and right. A chisel for a breaker characterized by shrinking while tilting to the front, and the front and rear surfaces in the thickness direction coincide and are sharpened at the tip of the tip.