JP2015166513A - Earth-removing device for construction machinery - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an earth-removing device for construction machinery, in which positions of left and right pin holes provided in a bracket welded and fixed to an earth-removing blade do not shift from each other, thereby attachment to a vehicle body becomes easy.SOLUTION: An earth-removing device provided on at least one of front and rear of an undercarriage of construction machinery includes: an earth-removing blade 9 extending in the width direction of the undercarriage; a lifting unit fixed to the undercarriage and interposed between the earth-removing blade 9 and the undercarriage, for lifting the earth-removing blade 9 up and down with respect to the undercarriage; and a bracket 24 fixed to the earth-removing blade 9 and to which the lifting unit is attached. The bracket 24 includes a pair of right attachment part 27 and left attachment part 28 to which the lifting unit is to be attached, which are formed integrally by being joined to a joint part 30.

Description

  The present invention relates to a soil removal device for a construction machine.

  A construction machine of this type, for example, a wheel-type hydraulic excavator, includes a lower traveling body and an upper revolving body provided on the upper part of the upper traveling body. A driver's seat is provided on the left side of the front part of the upper swing body. In addition, a boom, an arm, and a bucket are attached to the upper swing body so as to be rotatable relative to each other. A fuel tank, a hydraulic oil tank, an engine, or the like is mounted at the rear of the upper swing body.

  At least one of the front part and the rear part of the lower traveling body is attached with earth removing work such as earth and sand and a earth removing device for preventing the earth and sand from collecting on the lower side of the vehicle body during the work. Such earth removal work and sediment prevention are performed by a earth removal plate provided in the earth removal device (see, for example, Patent Document 1). The earth removing plate and the lower traveling body are connected by an elevating unit composed of a link, a cylinder and the like. The link of the lifting unit is provided such that a parallel link mechanism is formed between the earth discharging plate and the lower traveling body so that the earth discharging plate can be raised and lowered at a constant ground angle. Are connected to two brackets provided at intervals. The left and right brackets provided on the earth removal plate are directly fixed by welding, and each bracket is provided with a pin hole for connecting a link or the like with a pin. And the earth removal board raises / lowers by extending / contracting the cylinder of the raising / lowering unit pin-connected with the earth removal board and the lower traveling body.

Japanese Utility Model Publication No. 62-72357

  In the soil removal apparatus as described in Patent Document 1, in order to smoothly drive the lifting plate by the lifting unit, the lifting unit link, the connection between the soil discharging plate and the lower traveling body by the cylinder Must be performed with high accuracy. In particular, it is important that the positional relationship between the left and right brackets connecting the link to the earth removal plate and the positions of the pin holes provided in the left and right brackets are formed without positional deviation with respect to the pin axis. However, since each bracket is directly fixed to the earth discharging plate by welding, when attaching the bracket to the earth discharging plate, it is difficult to adjust the positions of the brackets with high accuracy, which requires labor.

  The present invention takes the above-mentioned prior art into consideration, and the construction machine in which the positions of the left and right pin holes provided in the bracket welded and fixed to the earth discharging plate are not shifted from each other, and thus the mounting work to the vehicle body is facilitated. An object of the present invention is to provide a soil removal device.

  In order to achieve the above object, in the present invention, a soil removal device provided in at least one of a front portion and a rear portion of a lower traveling body of a construction machine, the soil removal plate extending in the width direction of the lower traveling body, An elevating unit interposed between the earth removing plate and the lower traveling body and elevating the earth removing plate relative to the lower traveling body, and a bracket fixed to the earth removing plate and attached to the elevating unit The bracket has a pair of right and left mounting portions to which the lifting unit is to be mounted, and the right mounting portion and the left mounting portion are connected by a connecting portion and integrated with each other. A soil removal device for construction machinery is provided.

  Preferably, the right mounting portion and the left mounting portion have a plate shape in which a pin hole for fixing with the lifting unit and the pin is formed in a left-right direction, and the connecting portion includes the right mounting portion and the left mounting portion. And at least substantially the same thickness as the portion.

  Preferably, the connecting portion has a thickness larger than the thickness of the right attachment portion and the left attachment portion, and the right attachment portion and the left attachment portion are provided with an attachment allowance for fixing to the earth discharging plate. ing.

  Preferably, a plurality of bolt holes for fixing bolts to the earth discharging plate are formed in the mounting allowance.

  According to the present invention, since the right mounting portion and the left mounting portion forming the bracket are connected by the connecting portion and integrated with each other, the left and right mounting portions can be formed with high accuracy. For this reason, when attaching the lifting / lowering unit to the bracket, the attaching operation can be efficiently performed without taking time and effort for positioning.

  Moreover, even when the bracket and the lifting unit are pin-fixed, the right mounting portion and the left mounting portion can be integrated to prevent the positions of the pin holes from shifting to each other. Becomes easy.

  Further, by increasing the width direction of the connecting portion and providing the right mounting portion and the left mounting portion with mounting allowance, it becomes easy to perform a welding operation when the bracket is welded to the earth discharging plate.

  In addition, by providing a plurality of bolt holes in the mounting allowance, it is possible to replace only the soil discharge plate in a state where the lifting unit and the bracket are connected, and various soil discharge plates can be replaced according to the application of the construction machine. it can. Therefore, the versatility of the construction machine can be improved. Also, replacement and repair work are facilitated.

It is a schematic side view of the construction machine provided with the earth removal apparatus which concerns on this invention. It is a schematic perspective view of the earth removal board with which the bracket was welded. It is a schematic plan view of the earth discharging board of FIG. It is a schematic rear view of the earth discharging board of FIG. It is a schematic perspective view of the earth removal board with which another bracket was welded. It is a schematic plan view of the earth discharging board of FIG. It is a schematic rear view of the earth discharging board of FIG. It is a schematic perspective view which shows another bracket. It is a schematic perspective view of the attachment exchangeable with the bracket of FIG.

  As an example of a construction machine provided with the earth removing device 1 according to the present invention, a wheeled excavator 2 will be described as shown in FIG. The earth removing device 1 is provided in at least one of the front part and the rear part of the lower traveling body 3 of the wheel excavator 2 (in FIG. 1, an example provided in both the front part and the rear part is shown).

  An upper revolving unit 5 is mounted on the lower traveling unit 3 via a revolving wheel 4. Therefore, the upper turning body 5 can turn with respect to the lower traveling body 3. The upper swing body 5 is provided with a working device 6 including a boom 6a, an arm 6b, and a bucket 6c. A driver's cab (cab) 11 is provided on the front left side of the upper swing body 5. In addition, a counterweight 7 is provided behind the upper swing body 5 to balance the work apparatus 6 as a whole vehicle body.

  Various tanks (not shown) such as an engine, a hydraulic pump, a fuel tank, and a hydraulic oil tank are mounted on the rear portion of the upper swing body 5 and covered with a cover material 8. The earth removal device 1 includes an earth removal plate 9, an elevating unit 10, and a cover unit 12.

  The lifting unit 10 will be described with reference to FIG. The elevating unit 10 is interposed between the earth discharging plate 9 and the lower traveling body 3 and is fixed to the lower traveling body 3. By the lifting unit 10, the earth discharging plate 9 moves up and down with respect to the lower traveling body 3. Specifically, the elevating unit 10 has a parallel link mechanism, and the parallel link mechanism includes an upper link 13 and a lower link 14. The elevating unit 10 includes an attachment plate 15 to be fixed to the lower traveling body 3. One end of each of the upper link 13 and the lower link 14 is pivotally supported by a pair of left and right mounting brackets 16 erected from the mounting plate 15 so as to be rotatable about the rotation shafts 17 and 18 respectively. ing.

  The elevating unit 10 further includes a hydraulic cylinder 19. The hydraulic cylinder 19 is connected to the upper end of the mounting bracket 16 and the lower link 14 via rotary shafts 20 and 21, respectively. At this time, the tube 22 side serving as the base end of the hydraulic cylinder 19 is connected to the first wall body 16, and the rod 23 side is connected to the lower link 14. Therefore, when the hydraulic cylinder 19 contracts, the lower link 14 is pulled up and ascends with the rotating shaft 18 as a fulcrum.

  Next, the earth discharging board 9 will be described. The earth removing plate 9 extends in the left-right width direction of the lower traveling body 3. That is, the earth removal board 9 has a longitudinal direction in the left-right direction. As shown in FIGS. 2 to 4, a bracket 24 is attached to the earth discharging plate 9 by welding. The above-described lifting unit 10 is attached to the bracket 24. Specifically, a pair of right mounting portion 27 and left mounting portion 28 are formed on the bracket 24, and the above-described upper link 13 and lower link 14 are pinned to the right mounting portion 27 and the left mounting portion 28, respectively. Pin holes 25 and 26 for fixing are provided. A pin hole (not shown) is also provided at the other end of the upper link 13 and the lower link 14. The pin hole of the upper link 13 and the pin hole 25 of the bracket 24 are replaced with the pin hole of the lower link 14 and the bracket 24. The pins 13 and 14 and the bracket 24 are connected to each other by inserting a pin (not shown) with the position of the pin hole 26 aligned. As a result, the earth discharging plate 9 and the lifting unit 10 are connected, and the earth discharging plate 9 moves up and down via the links 13 and 14 by the hydraulic cylinder 19.

  More specifically, the right mounting portion 27 includes an upper portion 27a and a lower portion 27b, and the above-described pin holes 25 and 26 are formed in the upper portion 27a and the lower portion 27b, respectively. The upper part 27a consists of two board | plate materials, and the pin hole 25 is formed in each of this board | plate material. The other end of the upper link 13 is inserted between the pin holes in a state of being sandwiched between the upper portions 27a made of the two plates. The pin is inserted from the outside in the left-right direction of the bracket 24, and its position is fixed by a pin receiver 29 formed inside the left-right direction of the upper portion 27a. The same applies to the lower portion 27b, and the left mounting portion 28 has an upper portion 28a and a lower portion 28b similar to the right mounting portion 27. One pin is inserted through each of the upper portions 27a and 28a and the lower portions 27b and 28b.

  Here, the right mounting portion 27 and the left mounting portion 28 are connected by a connecting portion 30 and are integrated with each other. In the example of FIGS. 2 to 4, the connecting portions 30 are provided at a total of three locations including the upper and lower ends of the right mounting portion 27 and the left mounting portion 28, and a substantially central portion. Thus, the right and left attachment portions 27 and 28 can be formed with high accuracy by providing the connecting portion 30 and integrating the right attachment portion 27 and the left attachment portion 28 with each other. Specifically, the bracket 24 in which the left and right attachment portions 27 and 28 are integrated is fixed to the earth discharging plate 9 by welding in advance, and then processing for forming the pin holes 25 and 26 is performed. Thereby, the mutual position accuracy increases without the center positions of the pin holes 25 and 26 in the left and right attachment portions 27 and 28 being shifted. For this reason, when attaching the elevating unit 10 to the bracket 24, it is possible to efficiently and easily perform the attaching operation to the vehicle body (lower traveling body 3) without taking time and effort for positioning. That is, as compared with the case where the right attachment portion 27 and the left attachment portion 28 are separately welded and fixed to the earth discharging plate 9, the positional deviation of the pin holes due to the welding operation is suppressed, and the bracket 24 with high accuracy can be obtained.

  As described above, the upper portions 27a and 28a and the lower portions 27b and 28b of the right attachment portion 27 and the left attachment portion 28 are each formed of two plates. By making the connecting portion 30 substantially the same thickness as these plate materials, the right mounting portion 27 and the left mounting portion 28 can be connected with a minimum amount of material. In addition, when there are two or more connection parts 30, any one place is good also as substantially the same thickness as a board | plate material.

  5 to 7 show the earth discharging plate 9 to which another bracket 31 is fixed by welding. In this example, the connecting portion 30 is a plate-like shape that connects the seat plate 40 made of a single plate to which the right mounting portion 27 and the left mounting portion 28 are fixed together, and the lower ends of the right mounting portion 27 and the left mounting portion 28. The connection member 41 is formed. The seat plate 40 is provided with holes and notches so as to follow the shapes of the right mounting portion 27 and the left mounting portion 28, and the end surfaces of the right mounting portion 27 and the left mounting portion 28 on the soil discharge plate 9 side are seated. It is fixed in contact with the plate 40. The seat plate 40 and the connecting member 41 are larger in thickness than the two plate members forming the upper portions 27a and 28a and the lower portions 27b and 28b, and the seat plate 40 includes the right mounting portion 27 and the left mounting portion 28. An attachment allowance 32 is formed, which is larger than the outer shape of FIG. By providing this attachment allowance 32, in addition to the improvement of the welding workability of the connection part 30 mentioned above, the welding workability of both the attachment parts 27 and 28 is also improved. As a result, when the bracket 24 is fixed to the earth discharge plate 9 by welding, the welding operation is facilitated. Other configurations, operations, and effects are the same as those in the examples of FIGS.

  FIG. 8 shows another example of the bracket 33. The bracket 33 is not used for fixing the above-described attachment allowance 32 for welding, but is used for fixing a bolt with bolts 34 to the earth discharging plate 9 by forming a plurality of bolt holes in the welding allowance 32 ( FIG. 8 shows a state in which the bolt 34 is inserted into the bolt hole provided in the welding allowance 32). When this bracket 33 is used, pin holes are machined into the right mounting portion 27 and the left mounting portion 28 that are integrated in advance at the connecting portion 30, and the bracket 33 is mounted to the lifting unit 10. Then, the bolts 35 are inserted into the bolt holes 36 of the attachment plate 35 attached in advance to the earth discharging plate 9 and fixed to each other. Note that the bolt hole 36 may be provided directly in the earth discharging plate 9.

  In this manner, by providing a plurality of bolt holes in the mounting allowance 32, it is possible to replace only the soil discharge plate 9 in a state where the lifting unit 10 and the bracket 33 are connected, and various soil discharges are possible depending on the use of the construction machine. The board can be exchanged. For example, the replacement can be performed with an attachment 37 as shown in FIG. Therefore, the versatility of the construction machine 2 can be improved. Also, replacement and repair work are facilitated.

DESCRIPTION OF SYMBOLS 1 Earth removal apparatus 2 Wheel type excavator 3 Lower traveling body 4 Swivel wheel 5 Upper revolving body 6 Working device 6a Boom 6b Arm 6c Bucket 7 Counterweight 8 Cover material 9 Earth removal plate 10 Lifting unit 11 Driver's seat 12 Cover unit 13 Upper link 14 Lower link 15 Mounting plate 16 Mounting bracket 17 Rotating shaft 18 Rotating shaft 19 Hydraulic cylinder 20 Rotating shaft 21 Rotating shaft 22 Tube 23 Rod 24 Bracket 25 Pin hole 26 Pin hole 27 Right mounting portion 27a Upper portion 27b Lower portion 28 Left mounting portion 28a Upper portion 28b Lower part 29 Pin support 30 Connecting part 31 Bracket 32 Mounting allowance 33 Bracket 34 Bolt 35 Mounting plate 36 Bolt hole 37 Attachment 40 Seat plate 41 Connection member

Claims (4)

A soil removal device provided on at least one of a front part and a rear part of a lower traveling body of a construction machine,
A drainage plate extending in the width direction of the lower traveling body;
An elevating unit interposed between the earth removing plate and the lower traveling body, and elevating and lowering the earth discharging plate relative to the lower traveling body;
A bracket fixed to the earth discharging plate, to which the lifting unit is attached,
The bracket has a pair of right mounting portion and left mounting portion to which the lifting unit is to be mounted,
The right attachment portion and the left attachment portion are connected by a connecting portion and integrated with each other. The right mounting portion and the left mounting portion are plate shapes in which pin holes for fixing with the lifting unit and the pins are formed in the left-right direction,
The earthing device for a construction machine according to claim 1, wherein the connecting portion has at least substantially the same thickness as the right attachment portion and the left attachment portion. The connecting portion has a thickness larger than the thickness of the right mounting portion and the left mounting portion,
The earth removing device for a construction machine according to claim 2, wherein the right attaching portion and the left attaching portion are formed with attachment margins for fixing to the earth removing plate.   The earthing device for a construction machine according to claim 3, wherein a plurality of bolt holes for fixing bolts to the earthing plate are formed in the attachment allowance.

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