JPH0596155U - Hydraulic excavator work attachment - Google Patents

Abstract

(57) [Abstract] [Purpose] Since the boom length and bend angle cannot be changed with the conventional hydraulic excavator, a separate long attachment must be prepared when performing excavation work with a large working range. It was The cost is high, it is uneconomical, and it requires a large storage space, which is unsatisfactory. The present invention solves the above problems. [Structure] With the work attachment of the hydraulic excavator of the present invention, by installing the intermediate boom of the required shape between the rear boom and the front boom, the boom length and bend angle can be changed to accommodate various work contents. I decided to do it. Alternatively, a plurality of pin holes may be opened on each of the base end side and the tip end side of one relay boom, and a desired pin hole may be selected from among the plurality of pin holes so as to be pin-coupled. did.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention mainly relates to a work attachment mounted on a backhoe hydraulic excavator.

[0002]

[Prior Art]

 FIG. 5 is a diagram showing a working range of a hydraulic excavator having a normal integral boom. In the figure, 1 is a lower traveling structure of a hydraulic excavator, 2 is an upper revolving structure, 3 is a work attachment mounted on the front part of the upper revolving structure 2, 4 is a normal integrated boom which is a component of the work attachment 3, 5 is an arm, 6 is a bucket, H1 is the maximum excavation height of the work attachment 3, F1 is the maximum forward reach, and D1 is the maximum excavation depth. In the hydraulic excavator shown in FIG. 5, the work attachment 3 is attached to the front part of the upper swing body 2. A boom 4, an arm 5 and a bucket 6 are sequentially connected to the work attachment 3, and a boom cylinder 7, an arm cylinder 8 and a bucket cylinder 9 are extended / contracted to perform excavation work. FIG. 6 is a side view of a hydraulic excavator having a split boom. In the figure, parts that use the same components as the hydraulic excavator in FIG. 5 are given the same symbols. Reference numeral 10 is a work attachment, 11 is a split boom, 12 is a rear boom of the boom 11, 13 is a front boom, and 14 and 15 are pin joints of the rear boom (12) front end portion and the front boom (13) base end portion. The upper pin and the lower pin, respectively. As shown in FIG. 6, there are some booms that are formed in a divided shape depending on the circumstances of manufacturing the boom for excavation.

[0003]

[Problems to be solved by the device]

 In the conventional hydraulic excavator, the full length of the boom and the bend angle in side view (the angle K0 of the V-shaped boom 4 shown in FIG. 5) cannot be changed. However, depending on the work contents of the hydraulic excavator, excavation is required where the forward distance is farther than F1, the height is higher than H1, and the depth is deeper than D1. In this case, in the conventional technique, the work attachment 3 is replaced with the long attachment. FIG. 7 is a diagram showing a working range of the hydraulic excavator equipped with the long attachment 16. In the figure, 17 is an integrated long boom, 18 is a long arm, H2 is the maximum excavation height of the long attachment 16 (H2 is considerably larger than H1 shown in FIG. 5), F2 is the maximum forward reach (F2 is the figure). 5 is considerably larger than F1), D2 is the maximum excavation depth (D2 is considerably larger than D1 shown in FIG. 5). As mentioned above, when performing excavation work with a large working range, it was necessary to separately prepare a long attachment, which is expensive and uneconomical and requires a large storage space. So I was sick. The present invention aims to solve the above problems.

[0004]

[Means for Solving the Problems]

 In the work attachment of the present invention, a relay boom is installed between the rear boom and the front boom of the split boom according to the work content, and the boom length and the side view bend angle of the boom are adjusted. I chose Alternatively, the pitch dimension between the center of the pin hole of one of the upper pin hole and the lower pin hole at the base end of the relay boom installed between the rear boom and the front boom and between both pin holes Open another pin hole on the arc with half the diameter, and center the shaft center of either the upper pin hole or the lower pin hole at the tip of the relay boom above and Adjust the boom bend angle in side view by opening another pin hole on an arc with the pitch between both pin holes as the radius, and selecting the required pin hole from the above pin holes and connecting the pins. It was to so.

[0005]

【Example】

 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a side view of a hydraulic excavator equipped with a work attachment 19 according to the first embodiment of the present invention. In the figure, the same reference numerals are given to those using the same constituent elements as those in the prior art. Reference numeral 20 is a relay boom, 21 and 22 are pins on the upper side and the lower side of the connecting portion that joins the front end of the rear boom 12 and the base end of the relay boom 20, respectively, and 23 and 24 are the front end of the relay boom 20 and the front boom 13. Pins on the upper side and lower side of the connecting part that joins the base ends. P is the pitch between pins 21-22 and 23-24, l1 is the distance between pins 21-23, l'1 is the distance between pins 22-24, L1 is the full boom length, and K1 is the bend angle of the boom. Is. In the work attachment 19 shown in FIG. 1, a relay boom 20 having a substantially parallelogram shape is attached between the rear boom 12 and the front boom 13. As a result, the work attachment 19 is in a state in which the rear boom 12 of the work attachment 10 of the related art (shown in FIG. 6) is extended, and it is possible to perform a wide range of ordinary excavation particularly by utilizing the front reach.

Next, FIG. 2 is a side view of a hydraulic excavator equipped with a work attachment 25 of a second embodiment of the present invention. In the figure, the same components as those of the work attachment 19 of the first embodiment are designated by the same reference numerals. 26 is a relay boom. In addition, l2 is the distance between the pins 21-23, l'2 is the distance between the pins 22-24, L2 is the full boom length, and K2 is the bend angle of the boom. In the work attachment 25 shown in FIG. 2, a substantially rectangular relay boom 26 is attached between the rear boom 12 and the front boom 13. As a result, in this work attachment 25, since the connecting portion at the tip of the rear boom 12 is bent in a V shape and the front side thereof becomes long, it is possible to dig particularly deeply in the front.

Next, FIG. 3 is a side view of a hydraulic excavator equipped with a work attachment 27 according to a third embodiment of the present invention. In the figure, the same components as those of the work attachment 19 of the first embodiment are designated by the same reference numerals. 28 is a relay boom. In addition, l3 is the distance between the pins 21-23, l3 is the distance between the pins 22-24, L3 is the full boom length, and K3 is the bend angle of the boom. In the work attachment 27 shown in FIG. 3, the relay boom 28 is formed in a rectangular modified quadrangle so that the rear boom 12 and the front boom 13 are substantially aligned by attaching the relay boom. Therefore, the boom of the work attachment 27 becomes a long arm, and excavation at a particularly high place can be performed.

Next, FIG. 4 is a side view of a relay boom 29 used in the work attachment according to claim 2 of the present invention. In the figure, 30 is an upper pin hole at the base end of the intermediate boom 29, 31 and 32 are lower pin holes, 33 is an upper pin hole at the tip of the intermediate boom 29, and 34 and 35 are lower pin holes. Next, the construction of the work attachment according to claim 2 of the present invention (not shown as an overall side view, but will be sequentially described with reference to FIGS. 1, 2 and 3) will be described. The same components as those of the work attachment of claim 1 are used with the same reference numerals. In the work attachment according to claim 2 of the present invention, a plurality of arcs are formed on a circular arc having a radius P about the pin hole axis center of the upper pin hole 30 at the base end portion of the intermediate boom 29 installed between the rear boom 12 and the front boom 13. The lower pin holes 31, 32 are opened, and a plurality of lower pin holes 34, 34 are formed on an arc having a radius P about the pin hole axis of the upper pin hole 33 of the tip end of the intermediate boom 29. By opening a hole 35 and selecting a desired pin hole from the above-mentioned pin holes and connecting it to the distal end portion of the rear boom 12 and the proximal end portion of the front boom 13 by a pin, the bend angle of the boom in side view can be adjusted. did.

Next, the operation of the work attachment according to claim 2 of the present invention will be described. First, the first case of mounting the relay boom 29 will be described. Select the pin holes 30 and 31 at the base end of the intermediate boom 29, and pivotally attach the pins 21 and 22 to the end of the rear boom 12. Then, pin holes 33 and 34 at the tip of the intermediate boom 29 are selected, and the pins 23 and 24 are pivotally attached to the rear end of the front boom 13. The shape of the work attachment in the first case (including the bend angle and the entire length of the boom) is substantially the same as that of the work attachment 19 shown in FIG. Therefore, by performing the attachment in the first case, the same function as that of the work attachment 19 shown in FIG. 1 can be exhibited.

Next, a second case of mounting the relay boom 29 will be described. Select the pin holes 30 and 32 at the base end of the intermediate boom 29, and pivotally attach the pins 21 and 22 to the front end of the rear boom 12. Then, select the pin holes 33 and 35 at the tip of the intermediate boom 29, and pivotally attach the pins 23 and 24 to the rear end of the front boom. The shape of the work attachment in the second case is substantially the same as that of the work attachment 25 shown in FIG. Therefore, by performing the attachment in the second case, it is possible to exhibit the same function as that of the work attachment 25 shown in FIG.

Next, a third case of mounting the relay boom 29 will be described. Intermediary boom 29 Select the pin holes 30 and 31 at the base end of the intermediate boom 29 and pivotally attach the pins 21 and 22 to the front end of the rear boom 12. Then, select the pin holes 33 and 35 at the tip of the intermediate boom 29, and pivotally attach the pins 23 and 24 to the rear end of the front boom. The shape of the work attachment in the third case is substantially the same as that of the work attachment 27 shown in FIG. Therefore, by performing the attachment in the third case, it is possible to exhibit the same function as that of the work attachment 27 shown in FIG. As described above, by selecting a desired pin hole from a plurality of pin holes opened in one relay boom 29 and connecting the pins, a work contact corresponding to a wide range and various work contents is performed. The shape and size of the instrument can be adjusted.

[0012]

[Effect of the device]

 Since the boom length and bend angle cannot be changed with the conventional hydraulic excavator, a long attachment had to be prepared separately when performing excavation work with a large working range. The cost was high, it was uneconomical, and a large storage space was required, which was unsatisfactory. However, in the work attachment of the present invention, a relay boom is installed between the rear boom and the front boom of the split boom in response to the work content, and the boom length and side bend angle of the boom are adjusted. I decided to do it. Alternatively, the pitch between the upper and lower pin holes of the base end of the relay boom installed between the rear boom and the front boom is centered on the center of the pin hole and the pitch between the two pin holes. Drill another pin hole on a circular arc with the dimension as the radius, and center the shaft center of either the upper pin hole or the lower pin hole at the tip of the relay boom above or both Adjust the boom's side view bend angle by opening another pin hole on an arc with the pitch between the pin holes as the radius, and selecting the desired pin hole from the above pin holes and connecting the pins. did. That is, in the present invention, a relay boom and a front boom are provided between the rear boom and the front boom, so that the boom length and bend angle can be changed to accommodate various work contents. Alternatively, a plurality of pin holes are opened on the base end side and the tip end side of one relay boom, and the desired pin hole is selected from the plurality of pin holes to connect the pins. By doing so, the shape and size of the work attachment can be adjusted in a wide range and corresponding to various work contents. Moreover, the manufacturing cost of the relay boom is much cheaper than the manufacturing cost of long attachments, and the storage space is small, so it is economical.

[Brief description of drawings]

FIG. 1 is a side view of a hydraulic excavator equipped with a work attachment according to a first embodiment of the present invention.

FIG. 2 is a side view of a hydraulic excavator equipped with a work attachment according to a second embodiment of the present invention.

FIG. 3 is a side view of a hydraulic excavator equipped with a work attachment according to a third embodiment of the present invention.

FIG. 4 is a side view of a relay boom used in the work attachment according to claim 2 of the present invention.

FIG. 5 is a diagram showing a working range of a hydraulic excavator having a boom according to the related art.

FIG. 6 is a side view of a hydraulic excavator having a conventional split boom.

FIG. 7 is a diagram showing a working range of a hydraulic excavator equipped with a conventional long attachment.

[Explanation of symbols]

 2 Upper revolving structure 3,10,19,25,27 Work attachment 4,11 Boom 5 Arm 6 Bucket 12 Rear boom 13 Front boom 20, 26, 28, 29 Intermediate boom 21, ~, 24 pin 30, ~, 35 pin hole

Claims (2)

[Scope of utility model registration request] 1. A work attachment in which a boom, an arm, and a work tool are sequentially connected to a front portion of an upper swing body to form a work attachment, and the boom is formed into a front and rear divided shape by pin connection. The work of a hydraulic excavator characterized in that a relay boom is installed between the rear boom and the front boom of the boom according to the work content, and the boom length and the side view bend angle of the boom are adjusted. attachment. 2. A work attachment is formed by sequentially connecting a boom, an arm, and a work tool to a front part of an upper swing body, and further, the boom is formed in a divided form of a rear boom, a relay boom, and a front boom, and connecting parts are respectively formed. A work attachment that is connected by an upper pin and a lower pin, with the center of the shaft center of either the upper pin hole or the lower pin hole at the base end of the relay boom and both Open another pin hole on an arc whose radius is the pitch dimension between the pin holes, and set the axial center of either the upper pin hole or the lower pin hole at the tip of the relay boom above. Bend angle of the boom in side view by opening another pin hole on an arc centered at and the radius between both pin holes and selecting the required pin hole from the above pin holes I'll adjust A work attachment for a hydraulic excavator, which is characterized in that