JP6036359B2 - Construction machine valve fixing structure - Google Patents

Description

  The present invention relates to a valve fixing structure for a construction machine.

  2. Description of the Related Art Conventionally, there is known a construction machine including an attachment connected to the front side of an upper swing body so as to be raised and lowered (for example, see Patent Document 1). Usually, the attachment is composed of a boom, an arm, and a bucket. For example, a dismantling operation or the like can be performed by attaching a crusher or the like to the tip of the arm instead of the bucket.

  Here, in order to drive an additional attachment such as a crusher, it is necessary to add hydraulic piping. Patent Document 1 discloses a configuration provided with an extension pipe clamp for fixing the extension pipe to the attachment when the hydraulic pipe is added in accordance with a change in the specification of the attachment.

JP 2002-327453 A

  By the way, when an additional attachment is not mounted, it is conceivable to connect a stop valve to the tip of the hydraulic piping in order to shut off the oil flow to the added hydraulic piping. However, the clamp device disclosed in Patent Document 1 does not disclose any configuration for fixing the stop valve to the arm of the attachment.

  Therefore, prepare an arm that is welded with a plate with a screw hole to fix the stop valve and an arm that is not welded with a plate with a screw hole, etc., and select an arm that is selected according to the specifications of the additional attachment. It can be considered to be assembled in the device. However, preparing the two types of arms in advance has the problem that parts management becomes complicated and a large storage location needs to be secured.

  This invention is made | formed in view of this point, The objective is to enable it to fix with respect to an attachment the stop valve connected to the edge part of hydraulic piping with a comparatively simple structure. .

  The present invention relates to an upper swing body, an attachment connected to the front side of the upper swing body so as to be raised and lowered, a hydraulic pipe routed along the attachment, and an oil pipe connected to an end of the hydraulic pipe. A valve fixing structure of a construction machine for fastening and fixing the stop valve to a fastening block joined to the attachment and formed with a screw hole. A solution was taken.

That is, the first invention comprises an adapter member sandwiched between the stop valve and the attachment,
In the adapter member, a screw hole and a fitting hole for fitting the fastening block are formed at intervals from each other,
The stop valve is formed with first and second insertion holes through which the first and second fastening bolts are inserted,
The stop valve is fastened and fixed to the adapter member by inserting the first fastening bolt through the first insertion hole and fastening it to the screw hole of the adapter member. The adapter member is fastened together and fastened to the fastening block by inserting a bolt into the second insertion hole and fastening the bolt into the screw hole of the fastening block. .

  In the first invention, the adapter member is sandwiched between the stop valve and the attachment, and the stop valve is fixed to the fastening block via the adapter member. Specifically, since the screw hole and the fitting hole are formed in the adapter member, the stop valve is fastened and fixed to the adapter member by fastening the first fastening bolt to the screw hole of the adapter member. The Further, by fastening the second fastening bolt to the screw hole of the fastening block fitted in the fitting hole of the adapter member, the stop valve and the adapter member are fastened together and fastened to the fastening block.

  With such a configuration, the stop valve connected to the end of the hydraulic piping can be fixed to the attachment with a relatively simple configuration. Specifically, the attachment is originally provided with a fastening block for attaching a clamp member that holds the hydraulic piping. However, the positions of the first and second insertion holes formed in the stop valve do not correspond to the screw hole positions of the fastening block, or only one screw hole of the fastening block is formed in the first place. The stop valve cannot be fastened and fixed to the fastening block. Therefore, it is necessary to prepare an attachment arm separately provided with a fastening block dedicated to fixing the stop valve and an attachment arm not provided with a fastening block dedicated to fixing the stop valve, which makes it difficult to manage parts. There is.

  On the other hand, in the present invention, by inserting the adapter member between the stop valve and the attachment, using the fastening block originally provided on the attachment, the stop valve is connected to the fastening block via the adapter member. It can be fastened and fixed. Thereby, it is not necessary to replace the arm of the attachment in accordance with the presence or absence of the stop valve, and parts management is not complicated. Moreover, a stop valve can be retrofitted to an existing construction machine simply by inserting an adapter member.

According to a second invention, in the first invention,
The fastening block is joined to the attachment by being welded along the peripheral edge of the fastening block,
A concave portion for avoiding interference with a weld bead generated at a peripheral portion of the fastening block is formed on the surface of the adapter member on the attachment side.

  In the second invention, a recess is formed on the surface of the adapter member on the attachment side. The recess is recessed so as to avoid a weld bead generated at the peripheral edge of the fastening block.

  With such a configuration, since the adapter member does not contact the weld bead, the adapter member is not fastened and fixed to the attachment in an inclined posture. Thereby, rattling of the stop valve and the adapter member can be suppressed and fixed securely.

According to a third invention, in the first or second invention,
The insertion hole is formed in a long hole shape extending along the longitudinal direction of the attachment.

  In the third invention, since the fitting hole is formed in a long hole shape, the adapter member can be slid along the fitting hole.

  With such a configuration, the pitch distance between the screw hole of the adapter member and the screw hole of the fastening block is finely adjusted so as to correspond to the pitch distance between the first and second insertion holes of the stop valve. Therefore, it is possible to secure an adjustment allowance for absorbing a dimensional error of the part.

  According to the present invention, the stop valve is fastened and fixed to the fastening block via the adapter member by using the fastening block originally provided on the attachment by sandwiching the adapter member between the stop valve and the attachment. can do. Thereby, it is not necessary to replace the arm of the attachment in accordance with the presence or absence of the stop valve, and parts management is not complicated. Moreover, a stop valve can be retrofitted to an existing construction machine simply by inserting an adapter member.

It is a side view which shows the structure of the construction machine which concerns on embodiment of this invention. It is a top view which shows the structure of a stop valve. It is side surface sectional drawing which shows the structure of the stop valve of the state from which the distribution | circulation of oil was permitted. It is side surface sectional drawing which shows the structure of the stop valve of the state by which the distribution | circulation of oil was interrupted | blocked. It is a perspective view which shows the structure of an adapter member. It is a side view which shows the state which fastened and fixed the stop valve to the arm. It is a side view which shows the state which fitted the adapter member in the fastening block. It is a rear view which shows the state before attaching a stop valve and an adapter member to an arm. It is a rear view which shows the state after attaching a stop valve and an adapter member to an arm. It is a perspective view which shows the structure of the adapter member which concerns on other embodiment.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. It should be noted that the following description of the preferred embodiment is merely illustrative in nature and is not intended to limit the present invention, its application, or its use. In each figure, the up / down and front / rear / left / right directions are indicated by arrows. Unless stated otherwise, the vertical direction will be described according to the directions indicated by these arrows.

  FIG. 1 is a side view showing a configuration of a construction machine according to an embodiment of the present invention. As shown in FIG. 1, the construction machine 10 is connected to a lower traveling body 11, an upper revolving body 12 that is pivotably connected to the lower traveling body 11, and a undulating structure that is connected to the front side of the upper revolving body 12. And an attachment 20.

  A swing post 13 is provided on the front side of the upper swing body 12. A swing bracket 14 is attached to the swing post 13 via a swing pin (not shown) extending in the vertical direction. The swing bracket 14 swings so as to be rotatable in the horizontal direction around the swing pin.

  The attachment 20 includes a boom 21 and an arm 25, and a boom cylinder 22 and an arm cylinder 26 for driving them. The base end portion of the boom 21 is connected to the swing bracket 14 via a boom connecting shaft 21a. The boom 21 is rotatably supported by an expansion / contraction operation of the boom cylinder 22. The arm 25 is rotatably connected to the tip of the boom 21 via an arm connecting shaft 25a. The arm 25 is rotatably supported by an expansion / contraction operation of the arm cylinder 26. Note that a bucket (not shown) is rotatably connected to the tip of the arm 25.

  In the construction machine 10 according to the present embodiment, by attaching an additional attachment such as a crusher to the tip of the arm 25 instead of the bucket, various work contents such as a dismantling work can be handled. Here, in order to drive an additional attachment such as a crusher, it is necessary to add a hydraulic pipe 28 and connect it to a drive cylinder (not shown). The added hydraulic pipe 28 is routed along the side surface of the arm 25. A stop valve 30 is connected to the tip of the hydraulic pipe 28.

  As shown in FIGS. 2 to 4, the stop valve 30 includes a valve main body 31 for connecting the hydraulic pipe 28, and a fixing portion 33 that is integrally formed with the valve main body 31 and fixed to the side surface of the arm 25. It has. The fixing portion 33 is formed with a first insertion hole 33a and a second insertion hole 33b spaced apart from each other.

  A valve passage 32 through which hydraulic oil flows is formed in the valve main body 31. At both ends of the valve passage 32, connection ports 32a formed with female threads for connecting a pipe joint 28a (see FIG. 6) of the hydraulic pipe 28 are opened. The valve passage 32 is opened and closed by an opening / closing valve 35.

  The on-off valve 35 includes a spherical valve body portion 36 disposed at the axial center of the valve passage 32, and a valve shaft that is integrally formed with the valve body portion 36 and extends upward through the valve body portion 31. And a flange portion 38 formed integrally with the tip end portion of the valve shaft portion 37.

  A stopper pin 39 for restricting the rotation angle of the flange portion 38 is press-fitted into the upper surface of the valve main body portion 31. Specifically, a cutout portion 38a is formed on the outer peripheral edge of the flange portion 38 by cutting out a part thereof. The stopper pin 39 is disposed at the notch position of the flange portion 38 in plan view. That is, when the flange portion 38 is rotated in the circumferential direction, one end portion or the other end portion in the circumferential direction of the notch portion 38 a comes into contact with the stopper pin 39. Thus, the rotation angle is regulated according to the circumferential length of the notch 38a of the flange 38.

  A through hole 36a is formed in the valve body portion 36 so as to penetrate the center position of the spherical portion. Here, the flange portion 38 is rotated, and the on-off valve 35 is set so that the through hole 36a of the valve body portion 36 and the valve passage 32 of the valve body portion 31 extend in parallel as shown in FIG. Then, the circulation of oil to the valve passage 32 is permitted.

  On the other hand, when the flange portion 38 is rotated and the on-off valve 35 is set so that the through hole 36a of the valve body portion 36 and the valve passage 32 of the valve body portion 31 are orthogonal to each other as shown in FIG. The valve passage 32 is blocked by the valve body 36, and the oil flow to the valve passage 32 is blocked. In a state where the valve passage 32 is closed by the valve body portion 36, the closing bolt 29 is fastened and fixed to the connection port 32a on the side where the hydraulic pipe 28 is not connected (see FIG. 6).

  Hereinafter, a fixing structure of the stop valve 30 which is a characteristic part of the present embodiment will be described. As shown in FIGS. 5 to 9, the stop valve 30 is fastened and fixed to the side surface of the arm 25 via the adapter member 40. The adapter member 40 is formed with a screw hole 41 and a fitting hole 42 spaced from each other. A recess 43 extending in the longitudinal direction is formed on the surface of the adapter member 40 on the arm 25 side. Thereby, the adapter member 40 is formed in the cross-sectional concave shape.

  A fastening block 45 is welded to the side surface of the arm 25. Specifically, the fastening block 45 is joined to the side surface of the arm 25 by being welded along the peripheral edge thereof. At the periphery of the fastening block 45, a weld bead 47 having a thickness due to welding work is generated. The fastening block 45 is for attaching a clamp member (not shown) for holding the hydraulic pipe 28 and has a screw hole 46 formed therein.

  As shown in FIG. 7, the fitting hole 42 of the adapter member 40 is formed in a long hole shape that extends along the longitudinal direction of the arm 25. The fastening block 45 is fitted into the fitting hole 42. Here, since the recess 43 is formed on the surface of the adapter member 40 on the arm 25 side, the adapter member 40 does not interfere with the weld bead 47 at the peripheral edge of the fastening block 45. Thereby, the adapter member 40 does not come into contact with the weld bead 47 to be inclined, and the adapter member 40 can be brought into contact with the side surface of the arm 25 while suppressing the rattling of the adapter member 40.

  The stop valve 30 is fastened and fixed to the side surface of the arm 25 by a first fastening bolt 51 and a second fastening bolt 52. Specifically, the first fastening bolt 51 is inserted into the first insertion hole 33 a formed in the fixing portion 33 of the stop valve 30 and is fastened to the screw hole 41 of the adapter member 40. Thereby, the stop valve 30 is fastened and fixed to the adapter member 40.

  On the other hand, as shown in FIG. 8, the second fastening bolt 52 is inserted into the second insertion hole 33 b formed in the fixing portion 33 of the stop valve 30 and is inserted into the insertion hole 42 of the adapter member 40. The screw hole 46 of the fastening block 45 is fastened. Accordingly, the stop valve 30 and the adapter member 40 are fastened together by the second fastening bolt 52 and fastened and fixed to the fastening block 45 (see FIG. 9).

  As described above, in the valve fixing structure of the construction machine 10 according to the present embodiment, the adapter member 40 is sandwiched between the stop valve 30 and the arm 25, and the stop valve 30 is connected to the fastening block via the adapter member 40. 45 is fixed. Specifically, the stop valve 30 is fastened and fixed to the adapter member 40 by the first fastening bolt 51, and fastened to the fastening block 45 by being fastened together with the adapter member 40 by the second fastening bolt 52. Fixed.

  Accordingly, the stop valve 30 can be fastened and fixed to the fastening block 45 via the adapter member 40 using the fastening block 45 originally provided on the arm 25 of the attachment 20. Therefore, it is not necessary to replace the arm 25 according to the presence or absence of the stop valve 30, and component management is not complicated. Further, the stop valve 30 can be retrofitted to the existing construction machine 10 only by inserting the adapter member 40 therebetween.

<< Other Embodiments >>
About the said embodiment, it is good also as following structures.

  In the present embodiment, the configuration in which the concave portion 43 of the adapter member 40 is recessed so as to extend in the longitudinal direction of the adapter member 40 and has a concave cross section has been described. However, the interference with the weld bead 47 at the peripheral portion of the fastening block 45 is described. If it can avoid, the shape of the recessed part 43 will not be specifically limited. For example, the shape corresponding to the peripheral portion of the fastening block 45 may be recessed, or the both end wall portions in the width direction may be inclined to form a trapezoidal cross section as shown in FIG.

  Moreover, in this embodiment, although the fitting hole 42 of the adapter member 40 was formed in the long hole shape, it does not specifically limit to this form. For example, it may be formed in a rectangular shape according to the outer shape of the fastening block 45. Further, if the outer shape of the fastening block 45 is a round shape, the fitting hole 42 may be formed in a round hole shape.

  As described above, the present invention is extremely useful because it provides a highly practical effect that a stop valve connected to an end of a hydraulic pipe can be fixed to an attachment with a relatively simple configuration. Industrial applicability is high.

DESCRIPTION OF SYMBOLS 10 Construction machine 12 Upper revolving body 20 Attachment 28 Hydraulic piping 30 Stop valve 33a 1st insertion hole 33b 2nd insertion hole 40 Adapter member 41 Screw hole 42 Insertion hole 43 Recessed part 45 Fastening block 46 Screw hole 47 Weld bead 51 1st 1 fastening bolt 52 2nd fastening bolt

Claims (3)

An upper swing body, an attachment connected to the front side of the upper swing body so as to be raised and lowered, a hydraulic pipe routed along the attachment, and an end of the hydraulic pipe connected to block the flow of oil A valve fixing structure of a construction machine for fastening and fixing the stop valve to a fastening block that is joined to the attachment and has a screw hole formed thereon,
Comprising an adapter member sandwiched between the stop valve and the attachment;
In the adapter member, a screw hole and a fitting hole for fitting the fastening block are formed at intervals from each other,
The stop valve is formed with first and second insertion holes through which the first and second fastening bolts are inserted,
The stop valve is fastened and fixed to the adapter member by inserting the first fastening bolt through the first insertion hole and fastening it to the screw hole of the adapter member. A construction machine characterized in that a bolt is inserted into the second insertion hole and fastened to a screw hole of the fastening block, whereby the adapter member is fastened together and fastened to the fastening block. Valve fixing structure. In claim 1,
The fastening block is joined to the attachment by being welded along the peripheral edge of the fastening block,
A valve fixing structure for a construction machine, wherein a concave portion for avoiding interference with a weld bead generated at a peripheral portion of the fastening block is formed on a surface of the adapter member on the attachment side. In claim 1 or 2,
The valve fixing structure for a construction machine, wherein the fitting hole is formed in a long hole shape extending along a longitudinal direction of the attachment.

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