JPH0649554U - Hydraulic excavator counterweight - Google Patents

Abstract

(57) [Abstract] [Purpose] In a conventional hydraulic excavator, ear-shaped protrusions protruding forward are provided at both left and right ends of the counterweight,
The left and right sides of the engine compartment are protected.
However, when the excavator accidentally collides with a structure such as an electric pole when the hydraulic excavator turns, the impact is large and adversely affects various devices of the hydraulic excavator. This problem is solved. [Structure] In the counterweight of the present invention, horizontal belt-shaped side protectors are arranged in a range extending from the outer surface side of the ear-shaped protrusions formed on the left and right ends of the counterweight to the rear surface side of the counterweight. The outer peripheral surface of the vertical cross section is formed in a substantially arcuate shape projecting outward, and a horizontal strip-shaped projection is formed projecting on the rear surface of the counterweight between the left and right side protectors.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention mainly relates to the structure of a counterweight mounted on a construction machine such as a hydraulic excavator or a work vehicle.

[0002]

[Prior art]

 FIG. 6 is a perspective view of a main part of an embodiment of a conventional hydraulic excavator. In the figure, 1 is a lower traveling body of a hydraulic excavator, 2 is an upper revolving structure, 3 is a counterweight, 4 is a rear lamp device arranged at both left and right ends of the counterweight 3, and 5 is an engine hood. As shown in FIG. 6, the counterweight 3 is mounted on the rear portion of the upper swing body 2. However, since the material of the frame of the rear lighting device 4 arranged at the left and right ends of the counterweight 3 is a synthetic resin material, it often causes a collision accident by colliding with another obstacle. Moreover, the left and right outer side surfaces of the engine compartment in front of the counterweight 3 are not sufficiently protected. FIG. 7 is a plan view of the essential parts of another embodiment of a conventional hydraulic excavator. In the figure, reference numeral 6 denotes an ear-shaped protruding portion which is provided at both left and right ends of the counterweight 3'and protrudes forward. By providing the ear-shaped protruding portion 6 as shown in FIG. 7, when the side surface portion of the upper-part turning body 2 ′ near the counterweight 3 ′ collides with another obstacle, the engine room equipment can be protected. it can.

[0003]

[Problems to be solved by the device]

 In the conventional hydraulic excavator, ear-shaped protrusions that protrude forward are provided at both left and right ends of the counterweight to protect both left and right side surfaces of the engine compartment. However, when the excavator accidentally collided with the structure such as an electric pole during turning of the hydraulic excavator, the impact was great and adversely affected various equipment of the hydraulic excavator. An object of the present invention is to provide a counterweight that can solve the above problems.

[0004]

Means for Solving the Problems The counterweight of the present invention is equipped with a counterweight at the rear part of an upper revolving structure, and ear-shaped protrusions protruding forward from the front surface of the counterweight are formed at both left and right ends of the counterweight. However, the counterweight of the hydraulic excavator is designed to protect the engine room in front of the counterweight.The counterweight extends from the outer side of the ear-shaped protrusions formed on the left and right ends of the counterweight to the rear side of the counterweight. Each of them has a strip-shaped side protector arranged horizontally, and the outer peripheral surface of the vertical cross section of the side protector is formed in a substantially arcuate shape projecting to the outside. The strip-shaped projections in the respective directions were formed so as to project.

[0005]

【Example】

 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a side view of a hydraulic excavator equipped with the counterweight 7 of the present invention. In the figure, 8 is a lower traveling body, 9 is an upper revolving structure, 10 is a side protector, 11 is a belt-shaped projection formed on the rear surface of the counterweight 7, and 12 is a rear lamp. FIG. 2 is a perspective view of the counterweight 7 in FIG. FIG. 3 is a partially cutaway plan view seen from A of FIG. In the figure, 13 is an ear-shaped protrusion provided on both left and right ends of the counterweight 7 so as to project forward, and 14 is a filling member such as iron scraps and concrete material filled in the ear-shaped protrusion 13. FIG. 4 is a partially cutaway front view seen from B of FIG. FIG. 5 is a cross-sectional view of the main part viewed from CC of FIG. In the figure, 15 is a bolt for fixing the side protector 10 to the counterweight 7 and attaching it.

Next, the structure of the counterweight 7 of the present invention will be described with reference to FIGS. In the present proposal, horizontal bands are formed in the range from the outer surface side of the ear-shaped protrusions 13 formed at the left and right ends of the counterweight 7 to the rear surface side of the counterweight 7 (reference numeral a in FIG. 1 and FIG. 2). The side protector 10 (refer to the state of reference numeral B shown in FIG. 5) is provided, and the outer peripheral surface of the vertical cross section of the side protector 10 is formed in a substantially arc shape (the shape of reference numeral C shown in FIG. 5) protruding outward. did. A horizontal strip-shaped projection 11 is formed on the rear surface of the counterweight (7) between the left and right side protectors 10 so as to project rearward.

Next, the operation of the counterweight 7 of the present invention will be described. In the counterweight 7 of the present invention, the side protectors are arranged in a horizontal strip shape on the outer side surfaces of the ear-shaped protrusions 13 formed at the left and right ends of the counterweight 7, so that the outer surface side of the ear-shaped protrusions is disposed. When the vehicle collides with an external obstacle, it exerts a cushioning effect to mitigate the impact at the time of collision. Moreover, since the side protector 10 is provided in a range extending from the outer side surface side of the ear-shaped protruding portion 13 to the rear surface side of the counterweight 7, it is necessary to sufficiently widen the defense range in the horizontal direction in the case of a collision to exert a cushioning effect. You can Further, since the horizontal strip-shaped projection 11 is provided on the rear surface of the counterweight (7) between the left and right side protectors 10 and 10, the rear end of the side protector 10 is caught by another obstacle and peeled off. -It can be prevented from falling off.

[0008]

[Effect of device]

 In the conventional hydraulic excavator, ear-like protrusions protruding forward are provided at both left and right ends of the counter weir so as to protect both left and right side surfaces of the engine compartment. However, when the excavator accidentally collided with a structure such as an electric pole during turning of the hydraulic excavator, the impact was great and adversely affected various equipment of the hydraulic excavator. However, in the counterweight of the present invention, since the side protectors are arranged in a horizontal strip shape on the outer surface side of the ear-shaped protrusions formed at the left and right ends thereof, the outer surface side of the ear-shaped protrusion is externally disturbed. When it collides with an object, it exerts a cushioning effect to mitigate the impact at the time of collision. Moreover, since the side protector is provided in a range extending from the outer side surface of the ear-shaped protruding portion to the rear surface side of the counterweight, it is possible to sufficiently widen the range of protection against collision in the horizontal direction and to exert a cushioning effect. In addition, horizontal strip-shaped protrusions are provided on the rear surface of the counterweight between the left and right side protectors, so it is possible to prevent the rear end of the side protector from being caught by other obstacles and falling off. . Further, since the side protector and the strip-shaped projection are arranged in a straight line in the horizontal direction from the outer surface side of the ear-shaped protruding portion of the counterweight to the rear surface side of the counterweight, the appearance of the hydraulic excavator can be enhanced.

[Brief description of drawings]

FIG. 1 is a side view of a hydraulic excavator equipped with the counterweight of the present invention.

FIG. 2 is a perspective view of the counterweight of the present invention in FIG.

FIG. 3 is a partially cutaway plan view seen from A of FIG.

FIG. 4 is a partially cutaway front view seen from B of FIG.

5 is a cross-sectional view of a main part viewed from CC in FIG.

FIG. 6 is a perspective view of a main part of an embodiment of a conventional hydraulic excavator.

FIG. 7 is a perspective view of a main part of another embodiment of a conventional hydraulic excavator.

[Explanation of symbols]

 2, 2 ', 9 Upper revolving structure 3, 3', 7 Counterweight 5 Engine bonnet 6, 13 Ear-shaped protrusion 10 Side protector 11 Belt-shaped protrusion 12 Rear lamp 14 Filling member

Claims (1)

[Scope of utility model registration request] 1. A counterweight is provided at a rear portion of an upper revolving structure, and ear-shaped protrusions protruding forward from a front surface of the counterweight are formed at both left and right ends of the counterweight,
The counterweight of the hydraulic excavator is designed to protect the engine room in front of the counterweight, and is horizontal in the range from the outer surface side of the ear-shaped protrusions formed at the left and right ends of the counterweight to the rear surface side of the counterweight. The side protector is arranged in a vertical direction, and the outer peripheral surface of the vertical cross section of the side protector is formed in a generally arcuate shape that protrudes outward.The counterweight between the left and right side protectors has a horizontal belt shape. A counterweight for a hydraulic excavator, characterized in that the projection is formed to project.