JP3787198B2 - Attachment of work equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to attachments for work machines such as excavators and construction machines.
[0002]
[Prior art]
5 and 6 show a working machine equipped with an example of an attachment conventionally used.
[0003]
Reference numeral 1 denotes a lower traveling body. The lower traveling body 1 has endless rubber crawler shoes 2 on the left and right sides and a soil discharge plate 3 on the front end.
[0004]
Reference numeral 4 denotes a work machine body such as an upper swing body, and the work machine body 4 has a substantially circular plane shape and is attached to the upper portion of the lower traveling body 1 so as to be turnable.
[0005]
Reference numeral 5 denotes a cab, and the cab 5 is mounted on the left side of the front end of the work machine body 4.
[0006]
Reference numerals 6 and 7 denote brackets, and the bracket 6 is fixed to the upper surface of the work machine body 4 so as to be located slightly on the right side (the opposite cab side) from the center of the work machine body 4. The bracket 6 is fixed to the upper surface of the work implement main body 4 so as to be positioned on the front end side of the work implement main body 4 with respect to the bracket 6.
[0007]
Reference numeral 8 denotes a main boom, and a base end portion of the main boom 8 is pivotally supported on the bracket 6 by a pin 9 extending substantially horizontally in the width direction (left-right direction) of the work machine body 4.
[0008]
Reference numeral 10 denotes a boom hoisting cylinder. A cylinder main body 11 of the boom hoisting cylinder 10 is pivotally supported on the bracket 7 by a pin 12 parallel to the pin 9, and a tip end portion of a piston rod 13 of the boom hoisting cylinder 10. Is pivotally supported by a bracket 15 provided at the tip of the main boom 8 by a pin 14 parallel to the pin 9, and when working fluid is supplied to or discharged from the head side fluid chamber or the rod side fluid chamber of the boom hoisting cylinder 10. The main boom 8 undulates around the pin 9.
[0009]
Reference numeral 16 denotes an intermediate boom, and a base end portion of the intermediate boom 16 is pivotally supported by a distal end portion of the main boom 8 by a pin 17 extending in a direction orthogonal to the pin 9.
[0010]
Reference numeral 18 denotes a tip boom, and the tip boom 18 is pivotally supported on the tip of the intermediate boom 16 by a pin 19 parallel to the pin 17.
[0011]
The distal boom 18 is positioned above the intermediate boom 16 from the intermediate portion between the proximal end and the distal end of the distal boom 18 toward the proximal end of the intermediate boom 16 when viewed from the side. An extending cylinder support 20 is provided.
[0012]
Reference numeral 21 denotes a link bar, and the link bar 21 is disposed on the left side (cab side) of the intermediate boom 16 so as to be substantially parallel to the intermediate boom 16.
[0013]
The base end portion of the link bar 21 is pivotally supported by a pair of upper and lower link bar base end support brackets 23, 23 provided on the lower left side of the front end of the main boom 8 by a pin 22 parallel to the pin 17. The front end of the shaft is pivotally supported by a link bar and a cylinder front end support bracket 24 and a link bar front end lower support bracket 25 provided on the left side of the front end boom 18 by a pin 32 parallel to the pin 17.
[0014]
As shown in FIG. 6, when viewed from above, an imaginary line b (the tip boom 18) connecting the pin 19 and the pin 32 to an imaginary line a (belonging to the main boom 8) connecting the pin 17 and the pin 22 described above. Are located in parallel, and the link bar 21 is located in parallel to the intermediate boom 16, and the virtual line a (belongs to the main boom 8) by these intermediate boom 16 and link bar 21, etc. The parallelogram link mechanism 26 is configured with a fixed link.
[0015]
Reference numeral 27 denotes an offset cylinder. The offset cylinder 27 is positioned on the left side (cab side) of the intermediate boom 16 along the upper portion of the left side surface of the intermediate boom 16 and above the link bar 21. Has been placed.
[0016]
The base end portion of the cylinder body 28 of the offset cylinder 27 is pivotally attached to a pair of upper and lower cylinder base end support brackets 30, 30 provided on the left side of the base end of the intermediate boom 16 by a pin 29 parallel to the pin 17. The tip of the piston rod 31 of the offset cylinder 27 is connected to the cylinder tip upper support bracket 33 provided on the left side of the tip boom 18 by the pin 32 described above, the link bar 21 and the cylinder tip support bracket 24. When the working fluid is supplied to or discharged from the head-side fluid chamber or the rod-side fluid chamber of the offset cylinder 27, the intermediate boom 16 swings left and right around the pin 17.
[0017]
When the intermediate boom 16 swings in this way, the main boom 8 and the tip boom 18 are connected via the intermediate boom 16 and the link bar 21 that constitute the parallelogram link mechanism 26 described above. When viewed from above, the tip boom 18 is always kept parallel to the main boom 8 (see FIG. 6).
[0018]
Reference numeral 34 denotes an arm, and a base end portion of the arm 34 is pivotally attached to the distal end boom 18 by a pin 35 parallel to the pin 9.
[0019]
Reference numeral 36 denotes an arm rotation cylinder (see FIG. 5), and the base end portion of the arm rotation cylinder 36 is pivotally supported by the cylinder support portion 20 of the tip boom 18 by a pin 37 parallel to the pin 9. The distal end portion of the piston rod 38 of the arm rotation cylinder 36 is pivotally attached to a bracket 40 provided at the proximal end portion of the arm 34 by a pin 39 parallel to the pin 9. Alternatively, when the working fluid is supplied to or discharged from the rod-side fluid chamber, the arm 34 is rotated around the pin 35.
[0020]
Reference numeral 41 denotes a bucket for performing excavation work. A bracket 42 provided so as to protrude from the back surface of the bucket 41 is pivotally supported by a tip 43 of the arm 34 by a pin 43 parallel to the pin 9.
[0021]
Reference numeral 44 denotes a bucket rotation cylinder, and a cylinder main body 45 of the bucket rotation cylinder 44 is pivotally supported by a bracket 47 provided at a proximal end portion of the arm 34 by a pin 46 parallel to the pin 9, and is also used for bucket rotation. One end of each of the bucket link 50 and the arm link 51 is pivotally supported at the tip of the piston rod 48 of the cylinder 44 by a pin 49 parallel to the pin 9.
[0022]
Further, the other end of the bucket link 50 is pivotally supported by a bracket 42 on the back surface of the bucket 41 by a pin 52 parallel to the pin 9, and the other end of the arm link 51 is supported by a pin 53 parallel to the pin 9. It is pivotally supported in the vicinity of the tip of the arm 34, and when the working fluid is supplied to or discharged from the head side fluid chamber or the rod side fluid chamber of the bucket rotating cylinder 44, the bucket 41 rotates around the pin 43. ing.
[0023]
By the main boom 8, the intermediate boom 16, the tip boom 18, the arm 34, the bucket 41, and the boom hoisting cylinder 10, the offset cylinder 27, the arm rotating cylinder 36, the bucket rotating cylinder 44, and the like that operate these, A work implement attachment is configured.
[0024]
In the attachment of the working machine shown in FIGS. 5 and 6, for example, in a state where the main boom 8 is erected, the arm 34 is rotated so that the tip of the arm 34 approaches toward the cab 5, When the boom 16 is swung to the left, the bucket 41 may come into contact with the cab 5.
[0025]
Therefore, sensors for detecting whether the undulation angle of the main boom 8 with respect to the work implement body 4, the swing angle of the intermediate boom 16 with respect to the main boom 8, and the rotation angle of the arm 34 with respect to the tip boom 18 have reached predetermined values. Based on the detection signal from this sensor, the boom raising cylinder 10, the offset cylinder 27, and the arm turning cylinder 36 are operated before the bucket 41 and the like interfere with the cab 5 based on the detection signal from the sensor. A controller to be stopped is mounted on the work machine main body, and interference between the cab 5 and the bucket 41 is prevented by a cab interference preventing device including these sensors and controllers.
[0026]
As a means for transmitting and receiving signals between the sensor and the controller of the cab interference prevention device, an electric wire 62 for electrically connecting the sensor and the controller is provided on the side surface of the main boom 8 via a number of clamps 63. Attached.
[0027]
[Problems to be solved by the invention]
However, it is not easy to fix the electric wire 62 to the main boom 8 or the like that is a constituent member of the attachment via a large number of clamps 63.
[0028]
Moreover, since the electric wire 62 is supported by the side surface of the main boom 8, the electric wire 62 is caught by obstacles, such as a branch of a tree at the time of work, and the reinforcing bar which protruded from the concrete frame in the demolishing site, and the electric wire 62 will be broken. Sometimes.
[0029]
The present invention solves such a problem, eliminates the need for using a part for fixing an electric wire for supplying electric power to an electric device attached to the attachment, and prevents the electric wire from being exposed to the outside so as not to be broken. An object of the present invention is to provide an attachment for a working machine.
[0030]
[Means for Solving the Problems]
The present invention is provided at a predetermined distance a fluid pipe for supplying and discharging hydraulic fluid to the fluid pressure device constituting the organic and and attachment of the boom which is contoured rotatably supported to the work machine body to the back of the boom In the attachment of the work machine, a wiring insertion pipe extending from the base end portion of the boom toward the distal end portion is provided between the rear surface of the boom and the fluid piping, and the wiring insertion tube is formed by the rear surface of the boom and the two fluid pipings. The electric wire for supplying electric power from the work implement main body to the electric device provided to be sandwiched and attached to the attachment is inserted into the wiring insertion tube .
[0031]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
[0032]
FIG. 1 is a side view showing an example of an embodiment of the present invention, and the same parts as those in FIG.
[0033]
As with the conventional attachment, the working boom is supplied and discharged from the work machine body 4 to the fluid equipment such as the offset cylinder 27, the arm turning cylinder 36, and the bucket turning cylinder 44 shown in FIG. The fluid pipes 54 are arranged side by side as shown in FIG.
[0034]
As shown in FIG. 4, these fluid pipes 54 are placed on the surface of a pipe support base 55 fixed to the back surface of the main boom 8, and the surface of the pipe support base 55 is connected by a pipe clamp 56 and a bolt 57. It is supposed to be fixed on the top.
[0035]
For this reason, as shown in FIG. 3, a predetermined gap 58 having a dimension substantially equal to the height of the pipe support base 55 is provided between the back surface of the main boom 8 and the fluid pipe 54.
[0036]
As shown in FIG. 4, a semi-circular counterbore 59 is formed between the adjacent fluid pipes 54, 54 on the surface of the pipe support base 55. A pipe 60 is fitted and pressed into the counterbore 59 by the adjacent fluid pipes 54, 54.
[0037]
The wiring penetration pipe 60 is a flexible corrugated pipe and extends from the base end portion of the main boom 8 toward the tip end portion as shown in FIGS. 1 and 2. 1 and 3, in contact with the back surface of the main boom 8, it is pressed against the back surface of the main boom 8 by the two fluid pipes 54, 54, as shown in FIGS. 1 and 3. 54 and 54 so as not to be separated from the back surface of the main boom 8.
[0038]
As shown in FIGS. 3 and 4, electric wires 61 and 61 are inserted into the wiring insertion tube 60, and a tip boom 18 (see FIG. 5) or the like is supplied from a power source (not shown) provided in the work machine body 4. It is connected so as to supply power to an electric device such as an illuminating lamp (not shown) attached to the.
[0039]
When assembling the attachment shown in FIG. 1 to FIG. 4, the electric wires 61 and 61 are inserted into the wiring insertion tube 60 in advance.
[0040]
As shown in FIGS. 1 and 4, a pipe support base 55 is fixed to the back of the main boom 8, and after the wiring insertion pipe 60 through which the electric wires 61 and 61 are inserted in advance is arranged, the fluid pipe 54 is arranged. The fluid pipe 54 is fixed on the surface of the pipe support base 55 by the pipe clamp 56 and the bolt 57. The wiring insertion tube 60 is sandwiched between the back surface of the main boom 8 and the fluid pipes 54 and 54.
[0041]
In the above-described embodiment, the case where the wiring insertion pipe 60 is disposed on the back surface of the main boom 8 is illustrated and described. However, the wiring insertion pipe is also similarly applied to booms such as the intermediate boom 16 and the tip boom 18. 60 can be arranged.
[0042]
Note that the attachment of the working machine of the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the present invention.
[0043]
【The invention's effect】
As described above, in the attachment of the working machine of the present invention, various excellent effects as described below can be obtained.
[0044]
(1) In any of the attachments of the work machine according to claim 1 or 2 of the present invention, the wire insertion pipe without exposing the electric wire for supplying power from the work machine main body to the electric device attached to the attachment Therefore, the breakage of the electric wire can be prevented.
[0045]
(2) In the attachment of the work machine according to claim 2 of the present invention, it is not necessary to use a special part to fix the wiring insertion tube through which the electric wire for supplying electric power to the electric device is fixed to the boom. The number of parts and assembly man-hours can be reduced, and the wiring insertion pipe is hidden in the fluid piping, so that the appearance of the mechanical device is improved.
[Brief description of the drawings]
FIG. 1 is a side view showing an example of an embodiment of the present invention.
FIG. 2 is a rear view of FIG. 1 viewed from the II direction.
3 is a cross-sectional view taken along the line III-III in FIG.
4 is a cross-sectional view taken along the line IV-IV in FIG.
FIG. 5 is a side view showing an example of a working machine used conventionally.
6 is a view taken along arrow VI-VI in FIG. 5;
[Explanation of symbols]
4 Work implement body 8 Main boom (boom)
54 Fluid piping 58 Spacing 60 Wiring insertion pipe 61 Electric wire

Claims (1)

Working machine attachment provided at a predetermined interval with respect to undulations capable have a supported boom and back to the fluid pipe for supplying and discharging fluid pressure device to the working fluid which constitutes the attachment of the boom to the working machine body In this case, a wiring insertion pipe extending from the base end portion of the boom toward the distal end portion is interposed between the rear surface of the boom and the fluid piping so that the wiring insertion tube is sandwiched between the rear surface of the boom and the two fluid pipings. An attachment for a work implement, wherein an electric wire for supplying power from the work implement main body to an electrical device attached to the attachment is inserted into a wiring insertion tube.

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