JPH04119850U - Power swivel blade device - Google Patents

Abstract

(57) [Summary] [Purpose] By making the blade installed at the front of the lower traveling body vertically movable using a hydraulic jack, the configuration is simplified and the blade device can be easily installed on small power shovels. The goal is to [Structure] An upper rotating body 3 is provided on the upper part of the lower traveling body 2 which can freely move, and a bucket working machine A is provided at the front of this upper rotating body 3. In a power shovel equipped with a blade 14 that can be moved vertically, the vertical movement of the blade 14 is performed by a hydraulic jack 18. Since the hydraulic power source, hydraulic equipment, hydraulic piping, etc. can be omitted, it can be easily applied to small power shovels. A blade device can now be attached to the machine.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This idea is based on a power shovel brake that can be moved up and down using a hydraulic jack. related to the code device.

0002

[Conventional technology]

In a conventional power shovel, as shown in Fig. 2, an upper rotating body b is mounted on a lower traveling body a. A bucket working machine c is attached to the front part of this upper revolving body b. There is. In addition, a brake that can be moved up and down by a lift cylinder d is installed at the front of the lower traveling body a. A blade e is installed, and this blade e cuts the groove excavated by the bucket work machine c. In addition to making it possible to carry out backfilling work, it is also possible to perform excavation work using bucket work machine c. When performing cutting work, by grounding the blade e, the digging reaction force is transferred to the blade e. Because of this, it also functions as an outrigger to stabilize the car body. ing.

0003

[Problem that the idea aims to solve]

However, in the conventional blade device, the blade e is connected to a lift cylinder consisting of a hydraulic cylinder. Due to the structure that moves up and down by the cylinder d, oil is required to supply hydraulic pressure to the lift cylinder d. Requires hydraulic equipment such as pressure sources, valves, and swivel joints, as well as hydraulic piping. In the case of a type of power shovel, it is difficult to install these because there is no space for them. What problem was there? In addition, when using Blade e as an outrigger, a lift to support the excavation reaction force is used. Since cylinder d is a hydraulic cylinder, seals etc. may be damaged quickly due to repeated loads. There were also problems such as wear and tear and low durability. This idea was made with the purpose of improving the above-mentioned problems, and the hydraulic jack was used to We provide a power shovel blade device in which the blade moves up and down, and the configuration is This is an attempt to simplify and stabilize work.

0004

[Means to solve the problem]

In order to achieve the above-mentioned purpose, this invention has a rotating mechanism attached to the upper part of the self-propelled undercarriage. An upper revolving body is installed in the system, and a bucket working machine is installed at the front of this upper revolving body. , the above-mentioned power shovel has a blade attached to the front part of the lower running body so that it can move up and down. The blade is moved up and down by a hydraulic jack.

[0005]

[Effect]

This allows the hydraulic power source, hydraulic equipment, hydraulic piping, etc. to move the blade up and down. Since it is not necessary, the blade device can be easily installed on small power excavators. become. Also, when the blade is used as an outrigger, hydraulic pressure can be applied to handle excessive loads. Since the jack does not shrink, the vehicle body becomes more stable.

[0006]

【Example】

An embodiment of this invention will be described in detail with reference to FIG. In the figure, 1 is a power shovel, in which an upper rotating body 3 is mounted on a lower traveling body 2 that can move freely. It is installed so that it can rotate freely. A bucket working machine A is attached to the front part of the upper revolving body 3. The bucket working machine A mentioned above has a boom 5 that can be raised and lowered by a boom cylinder 4. A rotatable arm 7 is pivotally connected to the arm cylinder 6, and the tip of the arm 7 A rotatable bucket 9 is attached to the end by a bucket cylinder 8.

[0007] In addition, a driver's seat 10 and various operating levers 11 are installed on the upper part of the upper revolving body 3. The operator sitting in the driver's seat 10 operates the control lever 11 to operate the bucket work machine. By operating A, bucket work machine A can be used for excavation work, etc. ing.

[0008] On the other hand, a blade 14 is provided in front of the lower traveling body 2. The blade 14 has a pair of frames 14a protruding from the back side. The tip of the lower traveling body 2 is pivotally attached to a bracket 15 protruding from the front surface of the lower traveling body 2 via a pin 16. It is.

[0009] Also, it is installed at the center of the front of the lower running body 2 at a higher position than the bracket 15. A bracket 17 is provided protrudingly, and one of the hydraulic jacks 18 is attached to this mounting bracket 17. The ends are pivotally connected by pins 19. The other end of the hydraulic jack 18 is a mounting bracket protruding from the back of the blade 14. 14b via a pin 20, and is attached to the outer periphery of the other end of the hydraulic jack 18. The lever 21 is removably attached, and the lever 21 is rotated in the direction of arrow B-B. By moving the hydraulic jack 18, the hydraulic jack 18 can be expanded and contracted.

0010 Next, to explain the action, during normal running or light excavation with bucket work machine A, By shortening the hydraulic jack 18 and raising the blade 14, it will not interfere with driving or work. Never become a demon.

[0011] Next, bucket work machine A backfills the trench excavated by bucket work machine A. When carrying out heavy excavation, attach the lever 21 to the hydraulic jack 18 and turn it in the direction of arrow B-B. By moving the hydraulic jack 18, the hydraulic jack 18 is extended until the blade 14 touches the ground. By driving in this state, the blade 14 is used to backfill trenches and level the ground. When doing heavy excavation with bucket work machine A, the brake is The door 14 and hydraulic jack 18 act as outriggers that support the excavation reaction force and stabilize the vehicle body. and use it.

0012 At this time, unlike conventional hydraulic cylinders, it can withstand repeated loads and vibrations. The hydraulic jack 18 supports this without shortening, ensuring the stability of the vehicle body. Be able to do it.

[0013]

[Effect of the idea]

As detailed above, this idea is based on the fact that the blades installed at the front of the undercarriage are oil-oiled. Since it uses a pressure jack to move up and down, it is better than a conventional hydraulic cylinder. Compared to a lift cylinder that moves up and down, it requires less hydraulic power, valves, and swivel joy. It does not require any hydraulic equipment such as a vent or hydraulic piping. This allows the blade device to be easily attached to small power excavators, and , the number of parts can be significantly reduced, making it possible to reduce costs.

[0014] In addition, when using the blade as an outrigger by grounding it during bucket excavation, Even if the excavation reaction force is repeatedly applied to the rail, the hydraulic jack firmly supports it and the oil Because the pressure jack does not contract like a hydraulic cylinder, the stability of the vehicle body is more secure. As the oil ripens, internal seals such as those in hydraulic cylinders may wear out quickly. Since there are no scratches, durability can also be improved.

[Brief explanation of drawings]

FIG. 1 is a perspective view of a power shovel equipped with a blade device according to an embodiment of the invention.

FIG. 2 is a perspective view of a power shovel equipped with a conventional blade device.

[Explanation of symbols]

2 Lower running body 3 Upper revolving body 14 blades 18 Hydraulic jack A Bucket work machine

Claims (1)

[Scope of utility model registration request] Claim 1: An upper revolving body is provided on the upper part of the lower traveling body 2 which can freely move, and a bucket working machine A is provided at the front part of the upper revolving body 3, and a rotating upper part is provided at the front part of the lower traveling body 2. 1. A blade device for a power shovel, in which a blade 14 is attached to the blade 14 so as to be movable up and down, and the blade 14 is moved up and down by a hydraulic jack 18.