JP2000120104A - Attachment connecting device for construction machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To drill a vertical groove on a slope without a preliminary work by providing a derricking means rotationally movable up and down, a right and left rotationally moving means rotationally movable right and left, and a tilt means rotationally movable around the shaft in the longitudinal direction of a revolving super structure. SOLUTION: A ring 52 having a through hole in the (x)-axis direction is fixedly provided on the extreme end of the rod 46a of a hydraulic cylinder 46. Meanwhile, a bar-like projection 53 is fixedly provided on a connecting member 18, and the extreme end of the bar-like projection 53 is constituted so as to be able to be fitted to the hole of the ring 52. Under the condition in which the connecting member 18 and a second connecting member 40 are connected together while putting together the faces of both, the bar-like projection 53 is inserted into the hole of the ring 52. Consequently, when the rod 46a of the hydraulic cylinder 46 is extended or contracted, the bar-like projection 53 is rotationally moved up and down around a connecting pin 42, and as a result, the connecting member 18 is controlled to be rotationally movable around the (x)-axis. Hereby, a vertical groove can be drilled even on the inclined ground by tilting an attachment, and a groove or the like at optional angle can be easily drilled regardless of inclination of the ground surface.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention belongs to the technical field of a connecting device for connecting an attachment of a construction machine to an upper revolving superstructure.

[0002]

2. Description of the Related Art FIG. 5 shows an example of a conventional hydraulic excavator. The hydraulic shovel 10 has a swing unit 12 mounted on a lower traveling unit 11, and an upper swing unit 13 provided on the swing unit 12. On the upper revolving unit 13, an operator cab 14, a house 15 for storing equipment,
A counterweight 16 and the like are provided, and a connecting portion 19 is provided at a tip of the upper swing body 13 for connecting an attachment 17 for work. Attachment 1
Reference numeral 7 denotes a boom 21, an arm 22, and a bucket 23, each of which is rotatably connected to a pin by a pin, and connected to a connecting portion 19 via a connecting member 18. The boom cylinder 21,
The rotation angles of the arm cylinder 22 and the bucket cylinder 23 are controlled.

FIG. 6 shows details of a conventional connection structure of a connection member 18. As shown in FIG. FIG. 6A is a side view, and FIG. 6B is a plan view as viewed from arrows XX. As shown in FIG.
8 is rotatably connected to a connecting portion 19 of the upper rotating body 13 by a pin 28, and the turning angle thereof is
9. The boom 21 is rotatably connected to the connecting member 18 by a connecting pin 30, and the turning angle is controlled by a boom cylinder 24.

As shown in FIG. 7, the vertical direction of the upper revolving unit 13 is the z-axis, the front-rear direction is the x-axis, and the left-right direction is the y-axis.
If it is defined as an axis, the conventional attachment coupling device is z
Although it is configured to be rotatable around the axis and the y axis, x
It could not rotate around the axis. Therefore, even when it is desired to excavate the vertical groove 33 on a slope as shown in FIG. 8, only the groove 34 perpendicular to the slope 31 could be excavated.

Therefore, under the conventional apparatus, when it is desired to excavate the vertical groove 33, a horizontal ground 35 is formed on a part of the slope 32 as shown in FIG. Excavation of the groove 33 or laying of a rug on the lower side of the sloping ground to maintain the horizontal structure of the upper revolving structure 13 and excavate the vertical groove 33 as shown in FIG.

[0006]

In the conventional apparatus, when excavating a vertical ditch on a slope, a preliminary operation of leveling a part of the ground or laying a rug is required, and the work efficiency is reduced. This has been a problem. Excavation of a diagonal trench in a horizontal ground also causes the same problem as described above, which has been a problem. The present invention has been made under the above-described background, and an object of the present invention is to provide a construction machine such as a hydraulic shovel capable of excavating a vertical groove on a slope without the above-mentioned preliminary work.

[0007]

The present invention employs the following means to solve the above-mentioned problems. That is, claim 1
The invention described in a connecting device for connecting an attachment of a construction machine to an upper revolving structure of the construction machine, wherein the upper and lower turning means which can be turned up and down, the left and right turning means which can be turned left and right, and the upper turning means The present invention is characterized in that a tilt means is provided which is rotatable around an axis in the longitudinal direction of the body.

According to a second aspect of the present invention, in the first aspect of the present invention, a hydraulic cylinder is provided in the tilt means so that the rotation angle can be controlled.

According to a third aspect of the present invention, in the first aspect of the present invention, the tilting means is provided with means such as a screw or a gear so that the rotation angle can be manually controlled.

The invention according to a fourth aspect is characterized in that the tilt means of the first to third aspects is provided with a releasable tilt fixing means. When tilting, the tilt fixing means is released and fixed after tilting. That is, the tilt fixing means fixes the rotation angle in a non-tilted state or in a tilted state.

[0011]

FIG. 1 is a side view of a connecting device provided with a tilt mechanism according to an embodiment of the present invention, FIG. 2 is a front view, and FIG. 3 is a plan view. FIG. 4A is a diagram viewed from an arrow AA in FIG. 3, and FIG. 4B is a diagram viewed from an arrow BB in FIG. 3. Hereinafter, embodiments of the present invention will be described with reference to the drawings. The detailed description of the same components as those described in the conventional device will be omitted.

In FIG. 1, the connecting portion 18 of the attachment 17 is connected to the connecting portion 19 of the upper swing body 13 by the second connecting member 4.
0. The connection between the connecting portion 19 and the second connecting member 40 is rotatably connected in the left-right direction by the pin 28 as in the above-described conventional device. FIG. 3 is a plan view showing details of the connection structure between the connection member 18 and the second connection member 40. FIGS. 4A and 4B show the attachment 17.
FIG. 5 is a diagram showing a mechanism for tilting the camera. 3, the second connecting member 40 and the connecting member 18 are connected by a connecting pin 42 so as to be rotatable around a longitudinal axis, that is, an x-axis in FIG. One end of the connecting pin 42 is fixed to a hole provided in the connecting member 18 by press fitting or the like, and the other end is inserted into a hole 43 provided in the second connecting member 40 and is rotatably supported. In addition, the connection is not disengaged by means not shown, for example, a means such as a stopper ring.

The second connecting member 40 is provided with a shallow recess 44 in a part of its surface to adjust contact friction with the connecting member 18 or to make good surface contact. Further, a cavity 45 is provided for attaching and operating a hydraulic cylinder 46 to the recess 44. The hydraulic cylinder 46 is supported by a pin 48 so as to be rotatable in the direction of the arrow in FIG. One end of the pin 48 is supported by a hole (not shown) provided in the second connecting member 40, and the other end is supported by a hole 50 provided in the connecting member 18.

A ring 5 having a through hole at the tip of the rod 46a of the hydraulic cylinder 46 in the x-axis direction (front-back direction in the drawing)
2 is fixed. On the other hand, the rod-shaped protrusion 5
3 is fixed, and the tip of the rod-shaped projection 53 is
It is configured to be able to fit with the hole of. Connecting member 18 and second
The rod-shaped projection 53 is inserted into the hole of the ring 52 in a state where the connecting member 40 is connected with the two surfaces together. Therefore, when the rod 46a of the hydraulic cylinder 46 is expanded and contracted,
3 is rotated up and down around the connecting pin 42, and as a result, the connecting member 18 is controlled to be rotatable around the x-axis.

Since the present embodiment has the above-described configuration, the attachment 17 is provided in the same manner as the above-described conventional device.
It can move up and down around the axis, can rotate left and right around the z axis, and can tilt around the x axis. The tilt angle is controlled by the hydraulic cylinder 46. Therefore, the hydraulic shovel of the present embodiment is shown in FIG.
It is possible to excavate the vertical groove 33 by tilting the attachment 17 even on a slope as shown in FIG.

In the above embodiment, the hydraulic cylinder 46 is used to control the tilt angle, but the tilt driving means is not limited to this. The tilt angle may be manually controlled by using a worm gear or the like instead of the hydraulic cylinder. Further, the connection pins 42 are not limited to those described above, and other methods may be used. Furthermore, although the pin 48 of the hydraulic cylinder 46 is supported by both the connecting member 18 and the second connecting member 40, the pin 48 may be independently supported by the second connecting member 40.

Further, a means for fixing the tilt (not shown) may be provided to fix a non-tilted state (a state where the tilt angle is zero) and a tilt state. For example, a plurality of pin holes are provided on the circumference of the connection pin 42 of the connection member 18, and a projection pin is provided on the second connection member 40 so as to be movable in the pin hole direction. When inserting the pin into the pin hole to fix the tilt state and tilt, or when releasing the tilt and returning to the original state, the projection pin is retracted to disengage the projection pin from the pin hole.

As described above, when the tilt fixing means is provided, the risk that the attachment is erroneously tilted can be prevented. Also, the above-described hydraulic cylinder 4
In the case where the tilt is controlled by 6, the hydraulic pressure does not need to be applied in the fixed state, so that the control becomes easy. Although the above-described tilt means fixes the tilt state at a constant angular pitch, the tilt means may be fixed at any continuous tilt angle.

The embodiments and examples of the present invention have been described in detail with reference to the drawings. However, the specific configuration is not limited to the examples, and the design can be changed without departing from the gist of the present invention. The present invention is included in the present invention. For example, the present invention is not limited to a hydraulic shovel, but also belongs to the scope of the present invention when used for another construction machine.

[0020]

As described above, according to the structure of the present invention, since the means for tilting the attachment is provided, it is possible to excavate the vertical groove (or hole) even when the ground is inclined. Further, there is obtained an effect that a groove or the like can be easily excavated at an arbitrary angle regardless of the inclination angle of the ground.

[Brief description of the drawings]

FIG. 1 shows a side view of a schematic configuration of an embodiment of the present invention.

FIG. 2 shows a front view of a schematic configuration of an embodiment of the present invention.

FIG. 3 is a plan view showing the configuration of the present embodiment.

4A shows a second connecting member viewed from the arrow AA in FIG. 3, and FIG. 4B shows a connecting member viewed from the arrow BB in FIG.

FIG. 5 shows a side view of a conventional hydraulic excavator.

FIG. 6A is a side view of a connecting portion of a conventional hydraulic shovel. (B) is a plan view of a connecting portion of a conventional hydraulic shovel.

FIG. 7 shows a rotatable direction of a conventional coupling device.

FIG. 8 shows grooves that can be excavated by a conventional hydraulic excavator.

FIG. 9 shows an example in which a vertical groove is dug on a slope with a conventional hydraulic excavator.

FIG. 10 shows another example of digging a vertical groove on a slope with a conventional hydraulic excavator.

[Explanation of symbols]

 17 Attachment 18 Connecting member 24 Boom cylinder (up and down means) 29 Hydraulic cylinder (left and right rotating means) 40 Second connecting member 42 Connecting pin (tilt means) 46 Hydraulic cylinder (tilt means) 48 Support pin 52 Ring (tilt means) 53 rod-shaped protrusion (tilt means)

Claims (4)

[Claims] 1. A connecting device for connecting an attachment of a construction machine to an upper revolving structure of the construction machine, comprising: an up-and-down rotatable means; An attachment connecting device for a construction machine, comprising a tilting means rotatable around an axis in the front-rear direction of the body. 2. The attachment connecting device for a construction machine according to claim 1, wherein the tilt means is provided with a hydraulic cylinder so that a rotation angle can be controlled. 3. The attachment connecting device for a construction machine according to claim 1, wherein said tilt means is provided with means such as a screw or a gear so that the rotation angle can be manually controlled. 4. The attachment connecting device for a construction machine according to claim 1, wherein said tilt means is provided with a releasable tilt fixing means.