JP2005344429A - Hydraulic hose protective device for construction machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent damage to a plurality of hydraulic hoses caused by interference with a boom cylinder or the like by stopping forward movements of the plurality of hydraulic hoses in a swing bracket. <P>SOLUTION: A regulating plate 23 for regulating the forward movements of the plurality of hydraulic hoses is fixedly provided in front of the plurality of hydraulic hoses 22 in the swing bracket 22 with a boom cylinder 21 connected in a vertically turnable manner to the vicinity of the front part to drive a boom 18. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a hydraulic hose protection device for a construction machine, and in particular, the forward movement of a plurality of hydraulic hoses at a swing bracket portion is stopped to prevent the plurality of hydraulic hoses from interfering with a boom cylinder or the like. The present invention relates to a hydraulic hose protection device for a construction machine.

  A structural example of the swing bracket portion in the conventional construction machine will be described with reference to FIGS. 3 and 4. 3 is a plan view of the swing bracket portion, and FIG. 4 is a cross-sectional view taken along the line AA of FIG. 3 and 4, the upper plate 1 and the bottom plate 2 constituting the swivel frame of the upper swivel body are appropriately spaced in the vertical direction at the front end portion of the upper swivel body in a construction machine such as a small hydraulic excavator. And protruding. And the swing bracket 3 comprised as follows is connected with the front-end | tip part of this upper board 1 and the bottom board 2 so that left-right rotation is possible.

  That is, an upper bracket 5 having an inverted U-shaped cross section is provided in which the tip of the upper plate 1 is sandwiched from above and below via a boss 4, and the upper bracket 5 is formed by a short upper connecting pin 6. An upper connecting portion 7 is configured to be rotatably connected to the distal end portion of the plate 1. Further, a lower bracket plate 10 fixed to the bracket lower plate 8 via a pivot bracket 9 is provided, and the tip of the bottom plate 2 is attached to the boss 11 by the bracket lower plate 8 and the lower bracket plate 10. The bracket lower plate 8 and the lower bracket plate 10 are pivotally connected to the tip of the bottom plate 2 by a short lower connection pin 12 so that the lower connection portion 13 is It is configured.

  A pair of vertical plates 14 and 14 are erected on both sides of the bracket lower plate 8. The lower surfaces of the pair of vertical plates 14 and 14 are respectively fixed to the bracket lower plate 8, and the opposite sides of the pair of vertical plates 14 and 14 are fixed to both sides of the upper bracket 5. The upper connecting portion 7, the lower connecting portion 13, the pivot bracket 9 and the pair of vertical plates 14 and 14 are assembled as described above to constitute the swing bracket 3.

  The swing bracket 3 is connected to the tip portions of the upper plate 1 and the bottom plate 2 constituting the turning frame in the upper turning body by the upper connecting portion 7 and the lower connecting portion 13 so as to be turnable left and right. . Between the vertical plates 14 and 14 near the upper ends of the pair of vertical plates 14 and 14, a boom pivot portion 17 is formed by the boss 15 and the connecting pin 16, and the boom 18 can be moved up and down on the boom pivot portion 17. It is connected. A boom cylinder pivot 20 is formed by a connecting pin 19 on the pivot bracket 9 which is a slightly lower front end of the swing bracket 3, and the boom 18 is mounted on the boom cylinder pivot 20. A boom cylinder 21 for driving is coupled so as to be rotatable up and down.

  A plurality of hydraulic hoses 22 are drawn from the upper swing body side into the swing bracket 3 through the space between the upper connecting portion 7 and the lower connecting portion 13. The plurality of hydraulic hoses 22 are raised upward through the space between the boom pivoting portion 17 and the upper connecting portion 7 while being bent in a substantially S shape within the swing bracket 3, and include the boom 18. Pressure oil is supplied to and discharged from a plurality of driving bodies for driving the apparatus.

  In addition to the boom 18, the working device includes an arm attached to the tip of the boom 18 so as to be able to move up and down, a bucket attached to the tip of the arm so as to be rotatable. In addition to the boom cylinder 21, the plurality of drive bodies include the arm cylinder for driving the arm, the bucket cylinder for driving the bucket, and the like.

  By the way, the plurality of hydraulic hoses are raised to the boom side that performs the up-and-down operation after being pulled out of the lower part of the construction machine into the swing bracket that performs the left-right rotation operation. For this reason, when a lower traveling body entrains foreign matter such as waste material during traveling of the construction machine, the foreign matter may come into contact with the plurality of hydraulic hoses and cause damage to the plurality of hydraulic hoses. Further, during the operation of the swing bracket, the boom, and the like, a plurality of hydraulic hoses move along with the operation of these constituent members, and there is a possibility that damage is caused by the contact of the plurality of hydraulic hoses with the constituent members including them. .

  On the other hand, as a prior art related to protection of a hydraulic hose of a construction machine, for example, the following hydraulic excavator pipe protection structure is known. In this prior art, a swing bracket is connected to a bracket pivot part protruding in the vicinity of the front end of the upper swing body by a swing pin so that the swing bracket can be pivoted to the left and right, and between the bottom plate of the upper swing body and the bracket pivot part. The hydraulic piping drawn out from is passed below the swing pin and connected to a plurality of hydraulic cylinders for driving the work device. A pipe protection plate for protecting at least a part of the lower surface of the hydraulic pipe is disposed below the hydraulic pipe (see, for example, Patent Document 1).

  As another conventional technique, for example, the following swivel construction machine is known. In this prior art, a swing post (corresponding to the swing bracket) is formed in a horizontal U shape so that the top end of the upper plate of the revolving frame is sandwiched from above and below, and is connected to the top end of the upper plate by a short upper connecting pin. An upper bracket, a lower bracket formed in a horizontal U shape so as to sandwich the bottom plate tip of the revolving frame from above and below, and connected to the bottom plate tip by a short lower connection pin, and both side portions of the upper bracket And the both side parts of the said lower bracket are each fixed, and it comprises a pair of vertical board formed integrally with this upper bracket and lower bracket. In the vicinity of the upper ends of the pair of vertical plates, a boom pivot portion for pivotally supporting the boom is provided. In the vicinity of the front ends of the pair of vertical plates, the boom cylinder is pivotally supported. A boom cylinder pivot is provided.

Then, the hydraulic hose group extending from the control valve group in the swivel frame protrudes into the swing post through between the upper connecting pin and the lower connecting pin, and moves upward while bending in an S shape within the swing post. It rises and is connected to the hydraulic piping group of the working device through the space between the boom pivot and the upper bracket. Since the hydraulic hose group passes between the upper connection pin and the lower connection pin and is raised upward in the swing post, the hydraulic hose group is prevented from projecting to the lower side of the swing frame ( For example, see Patent Document 2).
JP 2000-273905 A (page 3, FIG. 1). JP 2001-214467 A (page 6, FIG. 9).

  In the prior art shown in FIG. 3 and FIG. 4, the plurality of hydraulic hoses pass from the upper swing body side between the upper connecting portion and the lower connecting portion in which a pair of vertical plates are erected on the left and right. Has been pulled in. Therefore, the plurality of hydraulic hoses are protected on the left, right, upper, and lower sides. However, the plurality of hydraulic hoses are pulled up into a swing bracket that rotates left and right, and then are raised to the boom side that performs a lifting operation while bending in a substantially S shape. Further, a boom cylinder is attached to the front portion of the swing bracket so as to be rotatable up and down. For this reason, when the swing bracket rotates, the plurality of hydraulic hoses move forward in the swing bracket and interfere with the boom cylinder and the like, and there is a possibility that damage is still caused by this interference.

  In the prior art described in Patent Document 1, a pipe protection plate for protecting at least a part of the lower surface of the hydraulic pipe is disposed below the hydraulic pipe. For this reason, the hydraulic piping is protected in the lower part thereof, but the front of the hydraulic piping has the same problem as the prior art shown in FIGS.

  Further, in the prior art described in Patent Document 2, the configuration in which the hydraulic hose group is pulled out into the swing bracket is substantially the same as the conventional technology shown in FIG. 3 and FIG. No further protection is taken against the hose group. For this reason, this conventional technique has the same problem as the conventional technique shown in FIGS.

  Therefore, there is a technical problem to be solved in order to prevent the plurality of hydraulic hoses from moving forward in the swing bracket and prevent the plurality of hydraulic hoses from being damaged due to interference with the boom cylinder or the like. The present invention aims to solve this problem.

  The present invention has been proposed in order to achieve the above object, and the invention according to claim 1 is a swing bracket connected to a vicinity of a front end portion of an upper swing body in a construction machine so as to be rotatable left and right, and the swing A boom pivotably connected to a boom pivot formed near the upper portion of the bracket and a cylinder pivot supported near the front of the swing bracket are pivotally coupled to drive the boom. And a hydraulic cylinder that is pulled out from the upper swing body side into the swing bracket and raised upward in the swing bracket to supply and discharge pressure oil to a plurality of drive bodies that drive the work device including the boom. In a construction machine including a plurality of hydraulic hoses, the plurality of hydraulic hoses are disposed in front of the plurality of hydraulic hoses in the swing bracket. To provide a hydraulic hose protection system for a construction machine comprising fixedly regulation plate for regulating the movement towards.

  According to this configuration, when a swinging operation or the like occurs in the swing bracket, the restriction plate stops the forward movement of the plurality of hydraulic hoses at the bent portion that is raised upward in the swing bracket. . Therefore, the plurality of hydraulic hoses can avoid interference with a boom cylinder or the like disposed at the front portion of the swing bracket. Further, since the forward movement of the plurality of hydraulic hoses is stopped, sagging occurs at the rear part of the swing bracket, and the movement at the rear part of the swing bracket becomes smooth.

  According to a second aspect of the present invention, an upper plate and a bottom plate that constitute a swivel frame in the upper swing body are provided at the front end portion of the upper swing body so as to protrude at an appropriate interval in the vertical direction. The upper connecting portion connected to the upper plate with a short upper connecting pin and the lower connecting portion connected to the bottom plate with a short lower connecting pin are rotated in the vicinity of the front end portion of the upper swing body. The plurality of hydraulic hoses are connected to each other, and provide a hydraulic hose protection device for a construction machine that is drawn into the swing bracket through the upper connecting portion and the lower connecting portion.

  According to this configuration, the lower surfaces of the plurality of hydraulic hoses can be avoided from being exposed. Therefore, when the construction machine is traveling or the like, it is possible to avoid foreign substances such as waste material that the lower traveling body is involved from contacting the lower surfaces of the plurality of hydraulic hoses.

  According to a third aspect of the present invention, the swing bracket includes a pair of vertical plates standing on both sides of the upper connection portion and the lower connection portion, and both ends of the restriction plate are connected to the pair of vertical plates. Provided is a hydraulic hose protection device for a construction machine fixed to a board.

  According to this configuration, the restriction plate can be easily attached to a more appropriate position with respect to the plurality of hydraulic hoses.

  According to the first aspect of the present invention, since the restriction plate for restricting the forward movement of the plurality of hydraulic hoses is fixed in front of the plurality of hydraulic hoses in the swing bracket, the plurality of hydraulic hoses are provided in the swing bracket. It is possible to prevent the hydraulic hoses from being damaged due to interference with the boom cylinder or the like by stopping the forward movement of the hydraulic hoses. In addition, the plurality of hydraulic hoses have the advantage that the movement at the rear part of the swing bracket can be made smooth by generating slack at the rear part of the swing bracket.

  According to a second aspect of the present invention, an upper plate and a bottom plate that constitute a swivel frame in the upper swing body are provided at the front end portion of the upper swing body so as to protrude at an appropriate interval in the vertical direction. The upper connecting portion connected to the upper plate with a short upper connecting pin and the lower connecting portion connected to the bottom plate with a short lower connecting pin are rotated in the vicinity of the front end portion of the upper swing body. The plurality of hydraulic hoses are pulled out into the swing bracket through the space between the upper connecting portion and the lower connecting portion, so that the plurality of hydraulic hoses can be connected. In addition, when the construction machine is traveling, it is possible to avoid the waste material or the like that the lower traveling body gets into contact with the lower surfaces of the plurality of hydraulic hoses, resulting in damage to the lower surfaces of the plurality of hydraulic hoses. Can prevent There is an advantage in that.

  According to a third aspect of the present invention, the swing bracket includes a pair of vertical plates standing on both sides of the upper connection portion and the lower connection portion, and both ends of the restriction plate are connected to the pair of vertical plates. Since it is fixed to the plate, the restriction plate can be easily installed at a more appropriate position with respect to multiple hydraulic hoses, and damage to the multiple hydraulic hoses due to interference with the boom cylinder etc. There is an advantage that it can be prevented more appropriately.

  The purpose of stopping the forward movement of the plurality of hydraulic hoses in the swing bracket and preventing the multiple hydraulic hoses from being damaged due to interference with the boom cylinder, etc. The upper plate and the bottom plate constituting the revolving frame in the upper revolving structure are protruded at appropriate intervals in the vertical direction, and the upper connecting portion formed on the upper plate and the lower side formed on the bottom plate A swing bracket connected to the vicinity of the front end portion of the upper swing body by the connecting portion so as to be turnable to the left and right; a boom connected to a boom pivoting portion formed near the upper portion of the swing bracket; A boom cylinder for driving the boom, which is connected to a cylinder pivot part formed near the front part of the swing bracket so as to be pivotable up and down, and the upper swinging body side A plurality of drive bodies that pass between the upper connection portion and the lower connection portion and are drawn into the swing bracket and are raised upward in the swing bracket to drive the work device including the boom. In a construction machine including a plurality of hydraulic hoses for supplying and discharging pressure oil, a restriction plate for restricting the forward movement of the plurality of hydraulic hoses is fixed in front of the plurality of hydraulic hoses in the swing bracket. It was realized by installing.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a plan view of a hydraulic hose protection device for a construction machine according to the present embodiment, and FIG. 2 is a cross-sectional view taken along line BB in FIG. In FIG. 1 and FIG. 2, the same or equivalent components as those in FIG. 3 and FIG. 4 are denoted by the same reference numerals as those in FIG.

  First, the structure of the hydraulic hose protection device for the construction machine according to the present embodiment will be described. As shown in FIGS. 1 and 2, the swing bracket 3 is formed at the front end portions of the upper plate 1 and the bottom plate 2 that constitute the turning frame in the upper turning body of the construction machine by the upper connecting portion 7 and the lower connecting portion 13. It is connected so that it can rotate left and right. A pair of vertical plates 14 and 14 are erected on both sides of the bracket lower plate 8 in the swing bracket 3, that is, on both sides of the upper connecting portion 7 and the lower connecting portion 13.

  A plurality of hydraulic hoses 22 are provided between the upper connecting portion 7 and the lower connecting portion 13 in which the pair of vertical plates 14 and 14 are erected on both sides as described above from the upper swing body side. It passes through the swing bracket 3. After being pulled out into the swing bracket 3, the plurality of hydraulic hoses 22 are raised to the side of the boom 18 that moves up and down while bending in a substantially S shape.

  In this embodiment, the plurality of hydraulic hoses 22 drawn out into the swing bracket 3 and raised upward interfere with the boom cylinder 21 and the like attached to the front portion of the swing bracket 3. Therefore, a rectangular regulation plate 23 for regulating the forward movement of the plurality of hydraulic hoses 22 is provided in front of the plurality of hydraulic hoses 22 in the swing bracket 3. It is fixed. Both ends of the restriction plate 23 are fixed to the pair of vertical plates 14 and 14 via attachment plates 24 and 24.

  Next, the operation of the hydraulic hose protection device for a construction machine configured as described above will be described. When a swinging operation or the like occurs in the swing bracket 3, the restriction plate 23 stops the forward movement of the plurality of hydraulic hoses 22 that are raised and bent upward in the swing bracket 3. Therefore, the plurality of hydraulic hoses 22 can avoid interference with the boom cylinder 21 and the like disposed at the front portion of the swing bracket 3. Further, since the forward movement of the plurality of hydraulic hoses 22 is stopped, a slack (a portion in FIG. 2) is generated at the rear part of the swing bracket 3, and the movement at the rear part of the swing bracket 3 becomes smooth.

  The plurality of hydraulic hoses 22 are guided into the swing bracket 3 through a space between the upper connecting portion 7 and the lower connecting portion 13 in which a pair of vertical plates 14 and 14 are erected on both sides. For this reason, it is avoided that the lower surfaces of the plurality of hydraulic hoses 22 are exposed. Therefore, when the construction machine is traveling, it is possible to prevent foreign matter such as waste material that the lower traveling body is involved from contacting the lower surfaces of the plurality of hydraulic hoses 22.

  As described above, in the hydraulic hose protection device for a construction machine according to the present embodiment, the forward movement of the plurality of hydraulic hoses 22 in the swing bracket 3 is stopped by the restriction plate 23, so that the plurality of hydraulic hoses 22 are stopped. It is possible to prevent damage due to interference with the boom cylinder 21 or the like. In addition, since the plurality of hydraulic hoses 22 are guided into the swing bracket 3 through the space between the upper connecting portion 7 and the lower connecting portion 13, a plurality of foreign materials such as waste materials are generated when the construction machine is traveling. It is possible to avoid contact with the lower surfaces of the hydraulic hoses 22 and to prevent the lower surfaces of the plurality of hydraulic hoses 22 from being damaged.

  The present invention can be variously modified without departing from the spirit of the present invention, and the present invention naturally extends to the modified ones.

The top view of the hydraulic hose protection apparatus of the construction machine which concerns on the Example of this invention. Sectional drawing which follows the BB line of FIG. The top view of the swing bracket part in the conventional construction machine. Sectional drawing which follows the AA line of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Top plate 2 Bottom plate 3 Swing bracket 6 Upper connection pin 7 Upper connection part 9 Pivot bracket 12 Lower connection pin 13 Lower connection part 14 Vertical plate 17 Boom pivot part 18 Boom 20 Boom cylinder pivot part 21 Boom cylinder 22 Hydraulic pressure Hose 23 regulation plate

Claims (3)

A swing bracket connected to the vicinity of the front end portion of the upper swing body in the construction machine so as to be turnable to the left and right, a boom connected to a boom pivoting portion formed in the vicinity of the upper portion of the swing bracket, and the swing bracket. A boom cylinder for driving the boom, and is pulled out from the upper swing body side into the swing bracket and is moved upward in the swing bracket. In a construction machine including a plurality of hydraulic hoses that are supplied to and discharged from a plurality of drive bodies that drive the working device including the boom,
A hydraulic hose protection device for a construction machine, wherein a restriction plate for restricting forward movement of the plurality of hydraulic hoses is fixed in front of the plurality of hydraulic hoses in the swing bracket.   At the front end portion of the upper swing body, an upper plate and a bottom plate that constitute a swing frame in the upper swing body are protruded at an appropriate interval in the vertical direction, and the swing bracket has a short upper side on the upper plate. The upper connecting portion connected by a connecting pin and the lower connecting portion connected by a short lower connecting pin to the bottom plate are connected to the vicinity of the front end portion of the upper swing body so as to be able to turn left and right. 2. The hydraulic hose protection device for a construction machine according to claim 1, wherein the plurality of hydraulic hoses are drawn into the swing bracket through between the upper connecting portion and the lower connecting portion.   The swing bracket includes a pair of vertical plates erected on both sides of the upper connection portion and the lower connection portion, and both ends of the restriction plate are fixed to the pair of vertical plates. The hydraulic hose protection device for a construction machine according to claim 1 or 2, characterized in that:

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