JPH0687169U - Counterweight for construction and work vehicles - Google Patents

Abstract

(57) [Summary] (Modified) [Purpose] In conventional hydraulic excavators, the space between the engine and its accessories, the hydraulic pump and other equipment, and the counterweight is very narrow, and the counterweight is also small. Was an integral structure and was fixedly attached to the vehicle body, so maintenance was extremely difficult. This problem is solved. A counterweight is formed by being divided into a plurality of weights, one of which is fixedly attached to the rear part of the vehicle body, and the other weights 13 and 14 are hinged to the end of the fixed weight. It is configured so that it can be pivotally connected via the so that it can be opened toward the rear of the vehicle body.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention mainly relates to the structure of a counterweight mounted on construction vehicles such as hydraulic excavators and work vehicles.

[0002]

[Prior art]

 FIG. 7 is a plan view of a main part of a hydraulic excavator equipped with a counterweight according to the related art. In the figure, 1 is an upper revolving structure which is a vehicle body, 2 is an upper frame of the upper revolving structure 1, 3 is an engine, 4 is a radiator, 5 is an air cleaner, 6 is a pump attached to the engine 3, and 7 is an engine. Is an oil filter attached to the engine 3, 8 is an injection pump, and 9 is a counterweight. FIG. 8 is a rear view of the main part of FIG. 7. In the figure, 10 is a bolt. As shown in FIG. 7 and FIG. 8, the counter weight 9 of the prior art is integrally formed and is attached to the rear portion of the upper frame 2 at the rear portion of the upper swing body 1 by a plurality of bolts 10. There is. An engine 3, a radiator 4, and an air cleaner 5 are arranged in front of the counterweight 9, and the engine 3 is equipped with a hydraulic pump 6, an oil filter 7, an injection pump 8 and the like. .

[0003]

[Problems to be solved by the device]

 In a hydraulic excavator, an engine, an air cleaner, a radiator, an oil cooler, a hydraulic pump, etc. are arranged in the center of the vehicle body, and the engine is equipped with an injection pump, an oil filter, etc. There are also many opportunities for maintenance due to various types of trouble. Conventionally, however, a counterweight has been provided at the rear of the engine, etc., and in order to minimize the rear end radius of the vehicle body, the space between the engine and other equipment and the counterweight is Very small, cramped and very difficult to maintain. The present invention aims to solve the above problems.

[0004]

[Means for Solving the Problems]

 As a first means, the counterweight of the present invention is formed by dividing the counterweight into a plurality of weights, one of which is fixedly attached to the rear part of the vehicle body, and the other weights are fixed as described above. It was connected to the end of the weight via a hinge so that it could rotate. As a second means, the counterweight is formed by dividing it into two left and right weights, and the left-hand weight is rotated to the left rear end of the vehicle body and the right-hand weight is rotated to the right rear end of the vehicle via hinges. Connected so that they can move. As a third means, either one of the left and right ends of the counterweight is rotatably connected to the side rear end of the vehicle body via a hinge.

[0005]

【Example】

 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a rear view of essential parts of a hydraulic excavator equipped with the counterweight 11 according to claim 1 of the present invention. In the figure, the same reference numerals are given to those using the same constituent elements as those in the prior art. 12 is a fixed weight, 13 is a left weight, 14 is a right weight, and 15 is a hinge. FIG. 2 is a plan view of an essential part of the counterweight 11 shown in FIG.

FIG. 3 is a rear view of the essential parts of a hydraulic excavator equipped with the counterweight 16 according to claim 2 of the present invention. In the figure, 17 is a left weight, 18 is a right weight, and 19 is a hinge. FIG. 4 is a plan view of an essential part of the counterweight 16 shown in FIG. In the figure, 20 is an upper frame.

FIG. 5 is a rear view of the essential parts of a hydraulic excavator equipped with the counterweight 21 according to claim 3 of the present invention. FIG. 6 is a plan view of an essential part of the counterweight 21 shown in FIG. In the figure, 22 is an upper frame.

Next, the structure of the counterweight of the present invention will be described with reference to FIGS. 1 and 2, the counter weight 11 is formed by a fixed weight 12, a left weight 13 and a right weight 14, and the fixed weight 12 is attached to the rear surface portion of the upper frame 2 with a plurality of bolts 10. A left weight 13 and a right weight 14 are connected to the left and right ends of the fixed weight 12 via hinges 15, respectively. 3 and 4, the counterweight 16 is formed by a left weight 17 and a right weight 18, and the left end of the left weight 17 is at the left rear end of the upper frame 20 and the right end of the right weight 18 is at the upper flare. -Connected to the right rear end of the frame 20 via hinges 19, respectively. 5 and 6, the counterweight 21 is integrally formed, and its left end is connected to the left rear end of the upper frame 22 via a hinge 19.

Next, the operation of the counterweight of the present invention will be described. In the counter weight 11 of claim 1, the left weight 13 and the right weight 14 are rotatably connected to both ends of the fixed weight 12 via hinges 15. Therefore, the left weight 13 and the right weight 14 are respectively It can be opened toward the rear of the vehicle. In the counterweight 16 of claim 2, the left weight 17 and the right weight 18 are rotatably connected to the left and right rear end portions of the upper frame 20 via hinges 19, respectively. You can The counterweight 21 according to claim 3 is formed as an integral structure, and its left end portion is connected to the left rear end portion of the upper frame 22 so as to be rotatable via a hinge 19, so that the counterweight 21 is directed toward the rear of the vehicle body. You can open the door. As described above, by opening the counterweight, a part or the whole of the rear surface portion of the vehicle body is opened, and the engine 3, the radiator 4, the air cleaner 5, the hydraulic pump 6, the oil filter 7, the injection pump 8, etc. Makes maintenance easier. The hinge may be formed by forming the end portion of the counterweight into a hinge structure.

[0010]

[Effect of device]

 In conventional hydraulic excavators, the space between the engine, hydraulic pump, and other equipment and the counterweight is very small, and the counterweight has an integral structure and is fixed to the vehicle body. Was very difficult to maintain. However, in the present invention, since the counterweight is attached to the vehicle body by using the hinge, a part or all of the counterweight can be opened toward the rear of the vehicle body. As a result, maintenance of equipment such as the engine and hydraulic pump can be performed easily and effortlessly, and maintenance and safety can be improved.

[Brief description of drawings]

FIG. 1 is a rear view of essential parts of a hydraulic excavator equipped with the counterweight according to claim 1 of the present invention.

FIG. 2 is a plan view of a main part of the counterweight shown in FIG.

FIG. 3 is a rear view of a main part of a hydraulic excavator equipped with the counterweight according to claim 2 of the present invention.

FIG. 4 is a plan view of a main part of the counterweight shown in FIG.

FIG. 5 is a rear view of the essential parts of a hydraulic excavator equipped with the counterweight according to claim 3 of the present invention.

FIG. 6 is a plan view of an essential part of the counterweight shown in FIG.

FIG. 7 is a plan view of a main part of a hydraulic excavator equipped with a counterweight according to the related art.

FIG. 8 is a rear view of the main part of FIG.

[Explanation of symbols]

 1 Upper revolving structure 2,20,22 Upper frame 3 Engine 6 Hydraulic pump 9,11,16,21 Counter weight 10 Bolt 12 Fixed weight 13,17 Left weight 14,18 Right weight 15,19 Hinge

Claims (3)

[Scope of utility model registration request] 1. A construction / work vehicle equipped with an engine, a hydraulic pump, and the like at the center of a vehicle body, and a counterweight at the rear of the vehicle, wherein the counterweight is divided into a plurality of weights. One weight inside is fixed and attached to the rear part of the vehicle body, and the other weights are
A counterweight for a construction / work vehicle, which is rotatably connected to an end of the fixed weight through a hinge so that the counterweight can be opened rearward of the vehicle body. 2. A construction / work vehicle having a central portion of a vehicle body equipped with an engine, a hydraulic pump, etc., and a rear portion provided with a counterweight, wherein the counterweight is divided into two right and left weights. The left weight is connected to the left rear end of the vehicle body, and the right weight is connected to the right rear end of the vehicle body so that they can be pivoted via hinges, respectively, so that a double door can be opened toward the rear of the vehicle. Counterweight for construction and work vehicles. 3. A construction / working vehicle having an engine, a hydraulic pump and the like in the center of the vehicle body and a counterweight in the rear portion thereof, wherein one of the left and right ends of the counterweight is a rear side end of the vehicle body. A counterweight for a construction / working vehicle, which is rotatably connected to a portion via a hinge so that the counterweight can be opened toward the rear of the vehicle body.