JPH0720338U - Attachment assembly equipment for construction machinery - Google Patents

Abstract

(57) [Summary] [Purpose] In a construction machine in which a boom is supported on the vehicle body so that it can be swung up and down, and an attachment is detachably attached to the tip side of the boom, it is easy to attach and detach the attachment to the tip side of the boom. In addition, the attachment posture of the attachment attached can be easily changed. [Structure] A boom b that is mounted on a vehicle body a so that it can be raised and lowered freely.
A base bracket 4 is rotatably assembled to the tip end side of the base via a toggle link mechanism 2 operated by a hydraulic cylinder 20, and a brim-shaped mounting collar portion 4b is provided on the tip end side of the base bracket 4. At the base end side of the machine, the assembling flange 4b is provided.
A brim-shaped assembly bracket 5 that is bonded to and overlaps with each other is provided, and the work machine is assembled by closing the assembly flange 4b and the assembly bracket 5 with the set bolts 44 ... Be sure to remove the work implement by releasing it.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a construction machine such as a backhoe configured by mounting a working machine such as a bucket on the tip side of a boom that can be rotatably and rotatably supported on the vehicle body, and is assembled on the tip side of the boom that is mounted on the vehicle body. The present invention relates to improvements in attachment devices for attachments such as shovels, hydraulic breakers, and rippers.

[0002]

[Prior art]

 In the construction machine, assembling means for mounting the attachment on the tip side of the boom to be mounted on the body of the construction machine is as shown in FIG. Regarding a means for assembling the bucket c as a working machine on the tip end side, a connecting shaft hole w1 is provided in the tip end portion of the arm 1 forming the boom b, and a toggle link mechanism operated by the hydraulic cylinder 20 is provided. 2 are provided with connecting shaft holes y1 and the connecting shaft holes w1 and y1 are overlapped with the connecting shaft holes w2 and y2 which are opened to the mounting bracket 3 mounted at the base end of the bucket c. Then, the bucket c is mounted by inserting the connecting shaft and setting by tightening the tightening nut.

When replacing the bucket c with the hydraulic breaker d, for example, the connecting shaft to which the bucket c is assembled is pulled out, the bucket c is lowered, and then the hydraulic breaker d is lifted. The connecting shaft holes w2 and y1 to be opened in the mounting bracket 3 mounted on the base end side are the connecting shaft hole w1 on the tip side of the boom b and the connecting shaft hole on the tip end of the toggle link mechanism 2. It is performed by superimposing it on y1 and inserting the connecting shaft to set it.

[0004]

[Problems to be solved by the device]

 As for the attachment means of the attachment in the construction machine described above, as for the attachment means of the bucket c, a heavy bucket c is lifted and the connecting shaft holes w2 and y2 of the mounting bracket 3 of the bucket c are attached to the tip side of the boom b. There is a problem that the assembling work becomes a difficult work because the shafts are overlapped with the connecting shaft holes w1 and y2 so that the shaft cores are aligned and the connecting shaft is inserted and set in that state.

Further, when exchanging the working machine, with the mounted working machine supported, first, the connecting shaft is pulled out, the work machine is subsequently removed, and the working machine is replaced and mounted. When the machine is lifted and the above-mentioned assembling work is performed, there is a problem that the detaching work for replacement is troublesome and difficult.

Further, when the working machine is the above-mentioned bucket c, depending on the working state, the bucket c may be assembled in a downward posture with its opening opening facing downward. There are cases where it is convenient and cases where it is convenient for the work to assemble it with the opening facing upwards. In such a case, the bucket c has to be reassembled so that the mounting posture of the bucket c is rotated by 180 degrees. However, even in this case, there is a problem that a troublesome detaching work must be performed.

[0007]

【Purpose】

 The present invention has been made in order to solve the above-mentioned problems occurring in the conventional means.A boom is rotatably and rotatably supported on a vehicle body, and an attachment is detachably attached to the tip end side of the boom. To provide a new means to easily attach and detach the attachment to and from the tip side of the boom in the construction machine to be assembled, and to change the assembly posture of the attached attachment. The purpose.

[0008]

[Means for Solving the Problems]

 As a means for achieving the above-mentioned object, the present invention provides a base bracket, which is mounted on a tip end side of a boom which is supported on the upper surface of a vehicle body so that it can be rotatably and rotatably supported, via a toggle link mechanism operated by a hydraulic cylinder. Assemble freely, and integrally install a brim-shaped assembling flange part that crosses in the left-right direction on the tip side of it, and provide a rotation center hole for inserting the central shaft 45 at the center part of the assembling flange part. Establish a set bolt hole for inserting the set bolt in the peripheral area equally facing the rotation center hole, and connect the work piece to the base end of the set bolt hole with the flange-shaped assembly flange part. A bracket-shaped mounting bracket that overlaps is provided, and a rotation center hole is provided in the center part of the bracket, and a set bolt that equally opposes the rotation center hole at a position corresponding to the set bolt hole of the assembly flange part at the peripheral part. For construction machines with holes It is intended to raise the assembling device of attachment.

[0009]

【Example】

 Next, embodiments will be described in detail with reference to the drawings. The same reference numerals are used for the constituent members having the same effects as those of the conventional means.

FIG. 3 is a side view of the main part of the construction machine embodying the present invention during the attachment of the attachment to the tip of the boom. In FIG. 3, most of b is omitted in the figure. 1, a boom that is rotatably supported on the upper surface of a vehicle body a of a construction machine, 1 is an arm that is flexibly connected to the tip of the boom b so as to form the tip of the boom b, 2 Is a toggle link mechanism assembled to the arm 1 and rotated by a hydraulic cylinder 20, 4 is a base bracket for assembling the working machine, c is a bucket as a working machine, and 5 is a base end portion of the bucket c. The assembled bracket is shown.

As shown in FIG. 1, the boom b is a normal one in which the arm 1 is connected to the tip side so as to be bent and rotatable, and the hydraulic cylinder 20 is attached to the upper surface side of the arm 1. The base ends of the link rods 2a and 2b of the toggle link mechanism 2 are connected to the tip end of the piston 200 into and out of which the link rods 2a and 2b are connected. One of the link rods 2a and 2b is pivotally connected to the arm 1 and the other end of the link rod 2a is provided with a connecting shaft hole y1 for connecting a working machine. . Further, a connecting shaft hole w1 paired with the connecting shaft hole y1 is opened at the tip of the arm 1.

The base bracket 4 is composed of a connecting portion 4 a that is connected to the tip of the arm 1 and a brim-shaped assembling flange portion 4 b for assembling the working machine. In the connecting portion 4a, connecting shaft holes w2 and y2 corresponding to the connecting shaft holes w1 and y1 are formed. The connecting shaft holes w2 and y2 are formed on the distal end side of the arm 1. By overlapping the w1 and the connecting shaft hole y1 provided in the toggle link mechanism 2, inserting the connecting shafts 40 and 41, and tightening with the tightening nut, as shown in FIG. Like the mounting bracket 3 integrally provided to the working machine such as c, it is assembled and attached to the tip side of the boom b.

Further, as shown in FIG. 5, the brim-shaped mounting collar portion 4b for assembling the working machine is formed in a plate shape having a substantially rectangular shape in a front view, and has the above-mentioned connecting portion. The front end side of the connecting portion 4a is laterally crossed, and is joined to the front surface of the bag-shaped portion formed on the front end side of the connecting portion 4a in a brim shape, and is integrally connected to the connecting portion 4a by welding. A rotation center hole 42 for inserting the central axis is formed in the center portion of the collar-shaped mounting collar portion 4b, and the rotation center hole 42 is vertically arranged with the rotation center hole 42 as the symmetrical axis center in the peripheral portion. And set bolt holes 43 are formed at positions symmetrically arranged to the left and right.

Therefore, the base bracket 4 is formed separately from the working machine such as the bucket c, and is connected to the tip side of the boom b by the connecting portion 4a thereof, which is shown in FIG. It becomes a state. Then, the working machine is removably assembled to the assembled brim portion 4b on the front end side of the base bracket 4 in this state via the assembled bracket 5 provided therein.

The assembling bracket 5 provided on the working machine is formed in a plate shape having substantially the same shape so as to be overlapped with the assembling flange portion 4b of the above-mentioned base bracket 4, and is joined to the assembling flange portion 4b. A rotation center hole 50 and a set bolt hole 51 are opened at positions corresponding to the rotation center hole 42 for insertion and the set bolt hole 43 for insertion of the set bolt, respectively.

As shown in FIGS. 7, 8 and 9, the brim-shaped mounting bracket 5 is a base end of each working machine such as a bucket c, a hydraulic breaker d, a ripper e, and a lift arm f. It is attached by welding to the side in a brim shape and integrally welded, and this brim-shaped assembling bracket 5 is joined so as to overlap with the brim-like assembling brim portion 4b provided on the base bracket 4 described above. Then, the set bolts 44 are connected to each other by closing them, and the set bolts 44 are connected to each other to release the connection, whereby the work machine is attached and detached.

Next, FIG. 10 and FIG. 11 show a posture in which the open mouth is upward without removing the bucket c, which is a working machine assembled to the base bracket 4 via the assembly bracket 5, from the tip side of the boom b. It is explanatory drawing at the time of converting into a downward attitude.

That is, as shown in FIG. 10, when the bucket c is assembled in a downward posture, the assembly flange portion 4b of the base bracket 4 and the assembly bracket 5 on the base end side of the bucket c are assembled. The set bolts 44 that close the and are removed, and are inserted into the rotation center hole 42 of the assembly collar portion 4b and the rotation center hole 50 of the assembly bracket 5, and the bucket c is set with the center shaft 45 as a fulcrum shaft. When rotated by 180 degrees, the bucket c is in an upward posture. In this state, the set bolt holes 43 of the assembling flange portion 4b of the base bracket 4 and the set bolt holes 51 of the assembling bracket 5 of the bucket c are overlapped with each other, and the set bolts 44 are inserted and tightened. By wearing it, the work of reassembling the bucket c in the upward posture is completed.

The center shaft 45 fitted into the rotation center holes 42 and 50 is fixedly mounted on the assembling flange portion 4b of the base bracket 4, and here, the assembling bracket 5 on the working machine side is provided. The rotation center hole 50 may be fitted and tightened with a nut. As a result, the work machine can be attached and detached only once while being supported by the central shaft 45, and the work can be further facilitated.

[0020]

[Effect of device]

 As described above, in the attachment mounting apparatus for the construction machine according to the present invention, the toggle link mechanism 2 that is operated by the hydraulic cylinder 20 is provided on the tip side of the boom b that is mounted on the vehicle body a so as to be erected and rotatable. The base bracket 4 is rotatably assembled through the base bracket 4, and a brim-shaped mounting collar portion 4b is provided on the tip end side of the base bracket 4, and the mounting collar portion 4b is mounted on the base end side of the working machine. A brim-shaped mounting bracket 5 that is bonded to and overlaps with the mounting bracket 4 is provided, and the mounting bolt 4b and the mounting bracket 5 are connected so as to rotate independently around the central axis 45, and then the set bolt 44 The work machine is assembled by closing with ... and the work machine is removed when the work is released. Therefore, when attaching or detaching the work machine, the work machine is connected to the toggle link mechanism 2 on the tip side of the boom b. Connection shaft 40 / Without troublesome work of inserting and removing the 1, it will be capable of desorbing the working machine with a simple operation.

[Brief description of drawings]

FIG. 1 is an overall schematic diagram of a conventional construction machine with a working machine removed.

FIG. 2 is a side view of a hydraulic breaker as an example of a working machine of the same construction machine.

FIG. 3 is a side view of a main part of a construction machine embodying the present invention, on the way of assembling a base bracket and a bucket as a working machine.

FIG. 4 is a side view of the main part of the same with the base bracket assembled.

FIG. 5 is a front view of the base bracket assembled to the main part of the same.

FIG. 6 is a rear view of the assembly bracket of the working machine assembled on the base bracket of the main part of the above.

FIG. 7 is a side view showing a state in which a hydraulic breaker is installed as a working machine for the essential parts of the same.

FIG. 8 is a side view showing a state in which a ripper is assembled as a working machine of the same as above.

FIG. 9 is a side view showing a state in which a lift arm is assembled as a working machine for the essential parts of the same.

FIG. 10 is a partially cutaway side view showing a state in which a bucket as a working machine of a main part of the same is assembled.

[Fig. 11] Fig. 11 shows the posture of the assembled bucket of the same as above.
It is a partially broken side view of a state of being rotated by 0 degree.

[Explanation of symbols]

a ... vehicle body, b ... boom, c ... bucket, d ... hydraulic breaker, e ... ripper, f ... lift arm, w1, w2 ...
y1 / y2 ... connecting shaft hole, 1 ... arm, 2 ... toggle link mechanism, 2a / 2b ... link rod, 20 ... hydraulic cylinder,
200 ... Piston, 3 ... Mounting bracket, 4 ... Base bracket, 4a ... Coupling portion, 4b ... Assembling flange portion, 40/41
... connecting shaft, 42 ... rotation center hole, 43 ... set bolt hole,
44 ... Set bolt, 45 ... Center shaft, 5 ... Assembly bracket, 50 ... Rotation center hole, 51 ... Set bolt hole.

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[Procedure amendment]

[Submission date] October 20, 1993

[Procedure Amendment 1]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 5

[Correction method] Change

[Correction content]

[Figure 5]

[Procedure Amendment 2]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 6

[Correction method] Change

[Correction content]

[Figure 6]

Claims (2)

[Scope of utility model registration request] 1. A base bracket 4 is rotatably assembled to a tip end side of a boom b rotatably and rotatably supported on an upper surface of a vehicle body a via a toggle link mechanism 2 operated by a hydraulic cylinder 20. A brim-shaped assembling flange portion 4b that crosses in the left-right direction is integrally provided on the tip side, and a rotation center hole 42 for inserting the central shaft 45 is provided at the center portion of the assembling flange portion 4b, while rotating at the peripheral portion. A set bolt hole 43 for inserting the set bolt 44 is opened so as to face the center hole 42 equally, and the work machine is joined to the brim-shaped assembling flange portion 4b at the base end side thereof to be superposed. Is provided with a collar-shaped mounting bracket 5, and a rotation center hole 50 is provided at the central portion thereof, and a rotation center hole 50 is provided at a position corresponding to the set bolt hole 43 of the assembling collar portion 4b at the peripheral portion. By providing set bolt holes 51 ... Attachment assembly equipment for construction machinery 2. A brim-shaped mounting collar portion 4 of the base bracket 4.
The set bolt hole 43, which is opened in b, is attached to the assembling flange 4
Central shaft 45 or rotation center hole 4 installed in the central portion of b
Arranged vertically and horizontally with 2 as the center,
A set bolt hole 51, which is opened corresponding to the set bolt hole 43 in the flange-shaped assembly bracket 5 of the working machine, is formed in the central portion of the assembly bracket 5, a central shaft 45, and a rotation center hole 50 for insertion. 2. The attachment assembling device for a construction machine according to claim 1, wherein the attachment device is arranged symmetrically with respect to the top and bottom and left and right.