JPH0941414A - Boom mounting/demounting device and method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily mount/demount a boom by itself by attaching a movable frame to a swing frame and connecting a boom cylinder to the movable frame to form a carne. SOLUTION: One ends 31a, 32a of a boom 31 and a boom cylinder 32 are attached to the front of a body frame 1 for an upper swing structure 23 via pins 33, 34, respectively. After the end of the boom 31 is placed on the under carriage of a trailer, one end 43a of a movable frame 43 is connected to the body frame 1 via a pin 42 and the other end is connected to the rod end 32b of a boom cylinder 32 removed from the boom 31 via pin 44 to form a crane. A hook 45 provided for the pin 44 is connected to a hook 41 for the boom 31 via a hoisting accessory 46 to expand the boom cylinder 32 so that the boom 31 can be suspended up and down. Therefore, the boom is easily mounted/ demounted by itself without requiring another crane.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a boom attaching / detaching device for a working machine used in a construction machine such as a hydraulic excavator, and more particularly to an attaching / detaching device by itself which does not require a crane or the like.

[0002]

2. Description of the Related Art A conventional boom attaching / detaching device will be described by taking a hydraulic excavator having a boom as an example of a working machine.
First, the hydraulic excavator 20 will be described with reference to FIG. The lower traveling body 21 can freely travel back and forth by a traveling motor (not shown). An upper revolving unit 23 that can be turned by a turning motor (not shown) is mounted on an upper portion of the lower traveling unit 21 via a swing circle 22. A work machine 30, a machine cabin 26, an operator cabin 27, and a counterweight 28 are attached to the upper swing body 23. The work machine 30 includes a boom 31, an arm 36, a bucket 38, a boom cylinder 32, and an arm cylinder 3.
7, a bucket cylinder 39, etc., for excavating earth and sand.

The boom 31 and the boom cylinder 32 are attached at their one ends to the front part of the vehicle body frame 1 of the upper swing body 23 by pins 33 and 34, respectively, and the boom cylinder 3 is attached.
The other end of 2 is attached to the center of the boom 31 by a pin 35. This boom 31 is pin 3 by the boom cylinder 32.
It is connected by 3 and can swing up and down. Also,
An arm 36 is attached to the tip of the boom 31, and the arm 36 is rotatable by an arm cylinder 37. Further, a bucket 38 is attached to the tip of the arm 36, and the bucket 38 has a tilt lever 39a and a link 39b.
The bucket cylinder 39 is rotatable via the.

By the way, when a hydraulic excavator is transported,
It is often necessary to remove the work equipment such as booms and arms when the equipment is fully equipped when the weight exceeds the weight stipulated by the Road Traffic Law, or when the road is bent or narrow. Also, the working machine is not only for transportation,
It is often necessary to remove it for inspection and maintenance. Among the working machines, the arms and buckets can be attached and detached by themselves by using the hoisting motion of the boom, but the booms cannot be attached and detached by themselves, and a separate crane was required for attachment and detachment.

[0005]

However, the operating sites of hydraulic excavators are often inconvenient places such as mountainous areas, and preparing a crane every time the boom is attached or detached complicates the schedule adjustment and costs too much. There's a problem. .

Focusing on the above-mentioned conventional problems, the present invention attaches a movable frame to a vehicle body frame of an upper swing body, connects a boom cylinder to this movable frame, and can easily attach and detach the boom by itself. It is an object of the present invention to provide a detachable device.

[0007]

To achieve the above object, a boom attaching / detaching device according to the present invention has a boom attached to a body frame, one end attached to the body frame, and the other end attached to the boom. A boom attaching / detaching device for attaching / detaching a boom to / from a construction machine having a boom hydraulic cylinder for swinging the boom up and down.
Of the movable frame 43 having one end attached to the vehicle body frame 1 and the other end attached to the boom hydraulic cylinder 32, and a suspender attached to the movable frame 43. 46 and a boom 31 are connected to each other, and the boom 31 is hung.

Further, in the above construction, the suspension means for suspending the boom is attached to the pin 44 or the movable frame 43 for connecting the boom hydraulic cylinder 32 and the movable frame.

A boom attaching / detaching method according to the present invention includes a boom attached to a vehicle body frame, a boom hydraulic cylinder having one end attached to the vehicle body frame and the other end attached to the boom, and the boom being swingably swingable. A boom attaching / detaching method for attaching / detaching a boom to / from a construction machine, comprising connecting a movable frame attached to a vehicle body frame and a boom hydraulic cylinder, and connecting the boom hydraulic cylinder at a position separated from an upper surface of the boom. A boom attaching / detaching method, characterized in that a movable frame on a side to be connected is connected to a boom, and the movable frame is raised and lowered by operating a hydraulic cylinder for the boom to lift and lower the boom.

[0010]

According to the above construction, in order to remove the boom, the bucket and the arm are first removed from the boom by a conventional method, and then the tip of the boom is placed on the trailer. Next, one end of the movable frame is connected to the revo frame with a pin, and the other end is connected with the rod end of the boom cylinder removed from the boom by another pin to form a crane. By connecting the boom to the pin that connects the movable frame and the boom cylinder to the movable frame with a lifting tool, and operating the boom cylinder,
Since the boom can be hoisted and hung, the boom can be easily attached and detached by itself without the need for a separate crane.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A concrete embodiment of a boom attaching / detaching device according to the present invention will be described below with reference to the drawings. The same parts as those in FIG. 13 will be described with the same reference numerals.

1 to 4 show a boom attaching / detaching device according to the first embodiment. FIG. 1 is a side view of the boom attaching / detaching device. 2 is a sectional view taken along line JJ of FIG. 3 is the X of FIG.
It is a perspective view. FIG. 4 is a view in which the movable frame is mounted on the upper surface of the boom.

First, FIG. 1 will be described. Boom 3
1, and one end 31a of the boom cylinder 32, and 3
2a are attached to the front part of the body frame 1 of the upper swing body 23 by pins 33 and 34, respectively. A hanging hook 41 is provided on the upper surface of the boom 31. One end of a movable frame 43 is rotatably attached to the upper end of the vehicle body frame 1 by a pin 42.

As shown in FIG. 2, the other end of the movable frame 43 is connected on both sides with spacers 47, 48, the hook 45, and the rod end 32b of the boom cylinder 32 by a pin 44, and both ends are locked by stoppers 49. are doing. A hook 45 provided in the center of the pin 44 is rotatably attached. One end of the suspending tool 46 is connected to a hook 41 provided on the boom 31 shown in FIG. 1, and the other end is connected to a hook 45 attached to a pin 44 so as to be rotatable. As shown in FIG. 3, the movable frame 43 is provided with a mounting hole 43d so that a bolt (not shown) provided on the upper surface of the boom 31 as shown in FIG. Has become.
The movable frame 43 may be fixed to the side surface of the boom 31.

Next, a method for removing the boom 31 will be described with reference to FIGS. 1 to 4 and FIGS. 5 shows the first step, FIG. 6 shows the second step, and FIG. 7 shows the third step. First, the first step of FIG. 5 will be described. In the hydraulic excavator 20 shown in the figure, the arms and the bucket are already removed, and the boom is removed (1) to (7). (1) Operate the boom cylinder 32 to place the tip of the boom 31 on the trailer 50. In this case, it is desirable to install the cart 51 with rollers under the tip of the boom 31.
Next, referring to FIG. 6, the following (2) to (5) are performed. (2) The movable frame 43 is attached to the vehicle body frame 1 by the pins 42. (3) Boom 31 to rod end 3 of boom cylinder 32
Remove the mounting pin 35 of 2b. (4) The rod end 32b of the boom cylinder 32, the end 43b of the movable frame 43, and the hook 45 are connected to the pin 4
Connect by 4. (5) Hook 45 and boom 3 provided on this pin 44
The suspending tool 46 is attached between the hooks 41 provided on the upper surface of 1. Next, referring to FIG. 7, the following (6) to (7) are performed. (6) Remove the mounting pin 33 at one end 31a of the boom 31 to put the boom 31 in a free state. (7) When the boom cylinder 32 is shortened, the movable frame 43 rotates about the pin 42 as a fulcrum, and the pin 44
It is possible to lower the boom 31 suspended from the hook 45 provided in the lower part and lower the boom 31 to the chassis of the trailer 50. The method for removing the boom has been described above, but the procedure for attaching the boom may be the reverse of the above. Also, when the blade is lowered to the ground for inspection and maintenance, the same procedure as above may be performed.

According to such a first embodiment, the boom 3
The end 43 of the movable frame 43 is connected to the vehicle body frame 1 by the pin 42 after the tip of the vehicle 1 is placed on the chassis of the trailer 50. The other end 43b is connected to the rod end 32b of the boom cylinder 32 removed from the boom 31 by a pin 44 to form a crane. The hook 45 provided on the pin 44 and the hook 41 of the boom 31 are connected by a hoisting tool 46, and the boom cylinder 32 can be hoisted and hoisted by expanding and contracting the boom cylinder 32. Therefore, a separate crane is required. The boom can be easily attached and detached by itself.

The movable frame 43 is always mounted on the upper surface or the side surface of the boom 31, so that the movable frame 43 can be easily attached and detached.

FIG. 8 shows another embodiment of the boom suspension means. Incidentally, the components denoted by the same reference numerals as those in FIG. The locking member 46a of the hanging tool is attached to the tip portion 43b of the movable frame 43. A suspender 46b is attached to the locking member 46a. This hanging tool 46
Alternatively, b may be locked to the hanging hook 41 provided on the upper surface of the boom 31.

FIG. 9 shows another embodiment of the mounting bracket for the movable frame. Except for the mounting bracket 2 of the movable frame 43, the description is omitted because it is the same as that of the first embodiment. The mounting bracket 2 of the movable frame 43 is attached to the revolving frame 1 with bolts 3. The movable frame 43 is attached to the bracket 2 by a pin 42a.

According to such a mounting bracket 2,
Processing for attaching the movable frame 43 to the swivel frame 1 is easy. Movable frame 43 and bracket 2
Can be removed when not needed.

FIG. 10 shows another embodiment of the movable frame. Except for the movable frame 43A, it is the same as the first embodiment, and the description thereof is omitted. The movable frame 43 of the first embodiment is elongated and a suspension fulcrum 43c is added.

According to such a movable frame 43A,
Since the suspension fulcrum can be used properly when removing the long boom and according to the suspension condition, a wide range of suspension work is possible.

FIG. 11 shows another embodiment in which a movable rope is used. Except for the movable rope 43B portion, it is the same as in the first embodiment and its explanation is omitted. The movable frame 43 of the first embodiment is replaced with a movable rope 43B and two hooks 45a.

According to such a movable rope, the movable rope 43B can be easily manufactured and handled and stored easily.

12 and 13 show a boom attaching / detaching device according to the second embodiment. The hydraulic excavator 20A shown in FIG. 12 is different from the conventional hydraulic excavator 20 shown in FIG.
The mounting positions of A and the boom cylinder 32A on the revolving frame 1A are upside down. FIG. 13 shows a boom attaching / detaching device in which the movable frame 43C is attached to the revolving frame 1A of the hydraulic excavator 20A shown in FIG.
The operation is the same as that of the first embodiment, and the explanation is omitted.

According to the second embodiment described above, since the movable frame 43C and the boom cylinder 32A are close to each other, the work of connecting the movable frame 43C and the boom cylinder 32A is easy, and the mounting position of the boom 31A is easy. Since the lower part is located below, it is easy to attach and detach the boom 31A.

[0027]

As described above, according to the boom attaching / detaching device and the method of the present invention, the movable frame is attached to the revolving frame, and the boom cylinder and the movable frame are connected to form a crane. Since it can be lifted and lowered, the boom can be easily attached and detached by itself without the need for a separate crane.

[Brief description of drawings]

FIG. 1 is a side view of a boom attaching / detaching device according to a first embodiment of the present invention.

FIG. 2 is a view as viewed from A in FIG. 1;

FIG. 3 is a view as viewed from B in FIG. 2;

FIG. 4 is a diagram in which a movable frame is mounted on the upper surface of a boom.

FIG. 5 is a first process diagram of boom removal.

FIG. 6 is a second process diagram of boom removal.

FIG. 7 is a third process diagram of boom removal.

FIG. 8 is an explanatory view of another embodiment of the hanging tool according to the present invention.

FIG. 9 is an explanatory view of another embodiment of the mounting bracket of the movable frame according to the present invention.

FIG. 10 is an explanatory view of another embodiment of the movable frame according to the present invention.

FIG. 11 is an explanatory view using a movable rope according to the present invention.

FIG. 12 is a side view of the boom attaching / detaching device according to the second embodiment of the present invention.

FIG. 13 is an explanatory diagram of a mounted state of the movable frame of the same.

FIG. 14 is a side view of the hydraulic excavator.

[Explanation of symbols]

1, 1A ... Revolving frame, 2 ... Bracket, 20, 20
A ... Hydraulic excavator, 21 ... Lower traveling body, 23 ... Upper swing body, 30 ... Working machine, 31, 31A ... Boom, 32, 32
A ... Boom cylinder, 33, 34, 35 ... Pin, 36 ...
Arms, 37 ... Arm cylinders, 38 ... Buckets, 39
... bucket cylinders, 41, 45, 45a ... hooks, 4
2, 44 ... Pins, 43, 43A, 43C ... Movable frame, 43B ... Movable rope, 46a ... Locking members, 46, 4
6b ... Hanging device.

Claims (3)

[Claims] 1. A boom from a construction machine comprising: a boom attached to a vehicle body frame; and a boom hydraulic cylinder having one end attached to the vehicle body frame and the other end attached to the boom, and the boom hydraulic cylinder swingably swings the boom. In the boom attaching / detaching device to attach / detach,
When the boom is suspended, a suspender is attached at a position separated from the upper surface of the boom, and the movable frame has one end attached to the vehicle body frame and the other end attached to the boom hydraulic cylinder, and the suspender attached to the movable frame. A boom attaching / detaching device comprising: a suspending unit that suspends the boom by connecting the boom and the boom. 2. The boom attaching / detaching device according to claim 1, wherein the suspending means for suspending the boom is attached to a pin or a movable frame for connecting the boom hydraulic cylinder and the movable frame. 3. A boom from a construction machine comprising a boom attached to a body frame, a boom hydraulic cylinder having one end attached to the body frame, the other end attached to the boom, and the boom hydraulic cylinder swingably swinging the boom. How to attach / detach the boom
The boom hydraulic cylinder is connected to the movable frame attached to the vehicle body frame, the boom hydraulic cylinder, and the boom is connected to the boom hydraulic cylinder at a position apart from the top surface of the boom. The boom attaching / detaching method is characterized in that the movable frame is raised / lowered by the operation of to lift the boom, and the boom is suspended to attach / detach the boom.