JP6064773B2 - Hydraulic hose arrangement structure - Google Patents

Description

  The present invention relates to a structure for disposing a hydraulic hose on the back side of a front plate disposed between a pair of vertical plates constituting an upper frame of a construction machine such as a hydraulic excavator.

  In the hydraulic excavator described in Patent Literature 1, a front plate is used to dispose a hydraulic hose on the back side of a front plate (sediment discharge guide 30) disposed between a pair of vertical plates (boom foot pin bracket 11). The hydraulic hose 60 is held by a hose clamp 62 attached to the back side of the (sand discharge guide 30) (FIG. 7 of Patent Document 1).

Japanese Patent No. 3902879

  In the arrangement structure of the hydraulic hose described in Patent Document 1, the hose clamp 62 is attached to the back side of the front plate (sediment discharge guide 30). It is difficult to see the hose clamp 62 in the way. That is, in the arrangement structure of the hydraulic hose as described in Patent Document 1, the work is carried out in such a posture as to lean out from the front side of the front plate and look into the back side of the front plate. It is difficult to arrange the hydraulic hose on the back side of the guide 30).

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a hydraulic hose arrangement that can easily perform the operation of arranging the hydraulic hose on the back side of the front plate disposed between the pair of vertical plates. Is to provide a structure.

  The present invention is a hydraulic hose arrangement structure for arranging a hydraulic hose on the back side of a front plate arranged between a pair of vertical plates constituting an upper frame of a construction machine. A clamp member for holding a hydraulic hose and a bracket to which the clamp member is attached. The bracket includes a bracket main body to which the clamp member is attached, and ribs for attachment to the front plate provided at both ends of the bracket main body, and the front plate has a notch. It has been. The mounting ribs are fixed to both left and right ends of the notch in a state where the bracket body is positioned inside the notch.

  According to the present invention, since the bracket main body portion to which the clamp member is attached is positioned inside the notch portion of the front plate, the operator who arranges the hydraulic hose can easily see the clamp member holding the hydraulic hose during the operation. Therefore, according to the structure of the present invention, it is possible to more easily perform the operation of arranging the hydraulic hose on the back side of the front plate disposed between the pair of vertical plates.

It is a side view of a hydraulic excavator which is an example to which the present invention is applied. FIG. 4 is a partial plan view of an upper frame in which some hydraulic hoses are disposed. It is an AA arrow line view of FIG. It is a BB arrow line view of FIG. It is a single-piece figure of the hose clamp shown to FIGS. 2-4 (FIG.5 (b) is CC sectional drawing of Fig.5 (a)). It is an assembly drawing of the hose clamp shown in FIG. It is an assembly drawing which shows the modification of the hose clamp shown in FIG.

  Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings. The present invention is applied to, for example, a hydraulic excavator among various construction machines.

(Configuration of hydraulic excavator)
As shown in FIG. 1, a hydraulic excavator 100 is a construction machine in which an upper swing body 42 is mounted on a crawler-type lower traveling body 41 so as to be rotatable around a vertical axis (turn center) O. Various facilities including the cabin 43 are mounted on the upper frame 20 which is a structure of the upper swing body 42 of the excavator 100. A work attachment 47 including a boom 44, an arm 45, and a bucket 46 is attached to the upper frame 20.

  The upper turning body 42 is turned by the turning motor 31 shown in FIGS. The swing motor 31 of the present embodiment is a hydraulic drive swing motor, but an electric swing motor may be used. The boom 44, the arm 45, and the bucket 46 are operated by a boom cylinder 44a, an arm cylinder 45a, and a bucket cylinder 46a, respectively. The boom cylinder 44a, arm cylinder 45a, and bucket cylinder 46a are all hydraulic cylinders.

  As shown in FIG. 2, a control valve 30 for controlling the supply and discharge of pressure oil is mounted on the upper frame 20, and the arm cylinder 45 a, the bucket cylinder 46 a and the control valve 30 are connected via a hydraulic hose 32. The turning motor 31 and the control valve 30 are connected via a hydraulic hose 33. Note that a hydraulic hose for the boom 44 for connecting the boom cylinder 44a and the control valve 30 is not shown.

  In the following description, the side on which the boom 44, the arm 45, and the bucket 46 are located is referred to as the front direction, and the “front and rear” and “left and right” directions are referred to based on this.

  As shown in FIG. 2 and FIG. 3, the upper frame 20 constituting the upper swing body 42 is composed of a base plate 21 serving as a base, a pair of vertical plates 22 erected on the bottom plate 21 by welding, and the like. Yes. The pair of vertical plates 22 are disposed to face each other with a predetermined interval in the left-right direction of the bottom plate 21.

  The pair of vertical plates 22 is erected on the bottom plate 21 in a direction extending in the front-rear direction of the bottom plate 21. A hole 22a to which the base end portion of the boom 44 is attached via a pin is provided at the top of the front mountain-shaped portion of the vertical plate 22.

  A front plate 23 is disposed between the pair of vertical plates 22. The front plate 23 is fixed to each vertical plate 22 by welding. As shown in FIG. 3, the portion from the substantially central portion to the front portion of the front plate 23 has a shape along the front portion of the vertical plate 22, and a pair of boom cylinders 44 a is attached to this portion. The plate material 24 is fixed by welding. The hole 24a provided in the plate member 24 is a portion to which the base end portion of the boom cylinder 44a is attached via a pin.

(Hydraulic hose arrangement structure)
As shown in FIG. 2, the front plate 23 is provided with a notch 23a. This notch 23a is U-shaped with the rear end side of the front plate 23 opened. Further, the front plate 23 has a U shape in which the width gradually increases from the midway portion in the front-rear direction to the rear end side. Note that it is not always necessary to use the U-shaped cutout portion 23a in which the rear end side of the front plate 23 opens. In other words, the bracket main body 5 described later may be a hole-shaped cutout with a closed periphery that can be disposed inside with a sufficient margin.

  Here, on the back side of the front plate 23, hydraulic hoses 32 for the arm 45 (arm cylinder 45a) and the bucket 46 (bucket cylinder 46a) are arranged along the front plate 23 (see FIG. 3). . These hydraulic hoses 32 are held behind the front plate 23 by the hose clamp 1.

(Hose clamp)
As shown in FIGS. 4 to 6, the hose clamp 1 includes a pair of clamp members 2 and 3 that hold the hydraulic hose 32 in a horizontal row and a bracket 4 to which the clamp members 2 and 3 are attached.

<Clamp member>
One clamp member 2 and the other clamp member 3 are vertically symmetrical, and the material thereof is, for example, rubber. The clamp members 2 and 3 are provided with a plurality of grooves 2a and 3a each having a semicircular cross section. The corresponding grooves 2a and 3a face each other, and the hydraulic hose 32 is held (clamped) at this portion. The clamp members 2 and 3 have holes 2b and 3b through which bolts 8 (fastening members) for fixing the clamp members 2 and 3 to the bracket 4 are inserted. The hole 2b and the hole 3b are overlapped, and the bolt 8 is inserted through this portion.

  In the present embodiment, the cylindrical spacer member 10 is extrapolated to the bolt 8. When the spacer member 10 is not provided, when the clamp member 2 and the clamp member 3 face each other and the hydraulic hose 32 is held in the grooves 2a and 3a and fastened with the bolt 8, the clamp members 2 and 3 may be depending on the fastening force. Excessive compression deformation may occur. On the other hand, since there is the spacer member 10 in this embodiment, the maximum value of the amount of compressive deformation of the clamp members 2 and 3 is the length of the spacer member 10. That is, according to the present embodiment, the clamping force is not excessively large and the clamp members 2 and 3 are not excessively deformed by compression. In other words, the fastening force can be made uniform, and the fastening force can be prevented from changing depending on the installation operator.

  A pressing plate 7 is disposed on the upper surface of the upper clamp member 2. The holding plate 7 has a hole 7a through which the bolt 8 is inserted. By providing the pressing plate 7, the clamp member 2 can be pushed by the surface, and the fastening force can be dispersed. As a result, the holding (holding) force of the plurality of hydraulic hoses 32 can be easily made uniform.

<Bracket>
The bracket 4 is, for example, a steel part having a bracket main body portion 5 to which the clamp members 2 and 3 are attached, and mounting ribs 6 formed at both ends of the bracket main body portion 5, for example, by bending a plate material. It is formed.

  The bracket body portion 5 is a portion to which the clamp members 2 and 3 are fitted and fixed, and has a concave shape (in the present embodiment, a U shape) on the back side of the front plate 23 (FIGS. 4 and 4). 5 etc.). That is, the bracket main body 5 has a concave shape. A hole 5a through which the bolt 8 is inserted is formed in the bracket body portion 5, and a nut 11 into which the bolt 8 is screwed is welded and fixed to the back surface thereof. The clamp members 2 and 3 are fitted from the front side surface of the bracket body 5. In other words, the clamp members 2 and 3 are fitted and contained inside the concave shape of the bracket body 5, and the clamp members 2 and 3 are positioned on the back side of the front plate 23.

  The two mounting ribs 6 formed by bending are portions extending from both ends of the bracket body 5, and holes 6a through which bolts 9 (fastening members) are inserted are formed in these mounting ribs 6. ing.

  As shown in FIGS. 2 and 4, for example, in a plan view, the bracket body 5 of the bracket 4 is positioned inside the U-shaped notch 23 a, and the left and right ends of the notch 23 a The mounting rib 6 is fastened (fixed) with bolts 9. A female screw is cut into a hole in the front plate 23 in which the bolt 9 is inserted, and the mounting rib 6 is fixed by screwing the bolt 9 into the female screw. Note that a nut may be welded to the back surface of the front plate 23, and the mounting rib 6 may be fixed by screwing the bolt 9 into the nut.

  In the present embodiment, the mounting rib 6 is fixed to the front side surface of the front plate 23, but the mounting rib 6 may be fixed to the back side surface of the front plate 23. Moreover, in this embodiment, the bracket main-body part 5 (bracket 4) is located in the foremost part (closed side) of the U-shaped notch parts 23a.

  Here, the bracket body 5 is located on the back side of the front plate 23, and the distance between the bottom surface S 1 of the bracket body 5 and the back surface S 2 of the front plate 23 is a pair of clamp members 2 that hold the hydraulic hose 32. 3 or more (see FIGS. 4 and 5). Here, the thickness t of the pair of clamp members 2 and 3 holding the hydraulic hose 32 is the total thickness of the pair of clamp members 2 and 3 holding the hydraulic hose 32.

  In the present embodiment, the side edges 2c and 3c in the direction in which the hydraulic hose 32 held (clamped) in the clamp members 2 and 3 extends have a continuous convex shape (raised). In the case of the clamp members 2 and 3 of this embodiment, the thickness t is the thickness of the portion excluding the raised side edges 2c and 3c, that is, the clamp members 2 and 3 (superposed). This means the minimum thickness of the clamp members 2 and 3).

  Although the side edges 2c and 3c having a continuous convex shape are not indispensable, by providing the side edges 3c on the lower clamp member 3, the clamp member 3 can be positioned with respect to the bracket body 5. It becomes easy (in other words, the clamp member 3 is not easily detached), and the workability is improved. Similarly, by providing both side edges 2c on the upper clamp member 2, positioning of the pressing plate 7 with respect to the clamping member 2 is facilitated (in other words, the pressing plate 7 is difficult to come off), and workability is improved. In the longitudinal direction of the clamp members 2 and 3, the clamp members 2 and 3 are positioned at the bent portion of the bracket body 5.

  The same effect can be obtained even if the side edges 2c and 3c of the clamp members 2 and 3 are discontinuous (intermittent) convex portions.

(Hydraulic hose arrangement method)
The arrangement | positioning method of a hydraulic hose is illustrated. First, one mounting rib 6 of the bracket 4 is temporarily fixed with a bolt 9 to the front side surface of the end portion of the notch 23 a of the front plate 23. At this time, the bracket 4 is rotatable about the mounting rib 6 portion.

  Next, the clamp member 3 is fitted on (mounted on) the bracket body 5 of the bracket 4. A plurality of hydraulic hoses 32 are placed on the clamp member 3 (in the plurality of grooves 3a). The clamp member 2 with the groove 2a side down is placed on the hydraulic hose 32. Then, the spacer member 10 is inserted into the holes 2 b and 3 b of the clamp members 2 and 3, and the presser plate 7 is placed on top. At the same time, the two mounting ribs 6 are finally fixed to both ends of the notch 23 a of the front plate 23 with bolts 9.

(Function and effect)
According to the hydraulic hose arrangement structure of the present invention, since the bracket body 5 to which the clamp members 2 and 3 are attached is positioned inside the notch 23a of the front plate 23, the clamp members 2 and 3 can be viewed from the front side. The operator who arranges the hydraulic hose 32 can easily see the clamp members 2 and 3 holding the hydraulic hose 32 during the operation. Therefore, the installation operator can easily match the holes 7a, 2a, 3a into which the bolts 8 are inserted. As a result, the operation of arranging the hydraulic hose 32 on the back side of the front plate 23 can be performed more easily than in the past.

  In the present embodiment, the mounting rib 6 of the bracket 4 is fixed (fastened) to the front side surface of the front plate 23, so that the installation operator does not have to turn his hand to the back side of the front plate 23 when mounting the bracket 4. . In other words, the installation operator can work in an easy posture, and the installation work of the hydraulic hose 32 on the back side of the front plate 23 can be performed more easily than in the past.

  Moreover, in this embodiment, the notch part 23a provided in the front board 23 is made into the U-shape which the rear end side of the said front board 23 opens. According to this configuration, the installation work of the hydraulic hose 32 such as the attachment of the clamp members 2 and 3 to the bracket body 5 and the work of holding the hydraulic hose 32 by the clamp members 2 and 3 is easy to see.

  Further, in this embodiment, the bracket body 5 is formed in a concave shape on the back side of the front plate 23, and the clamp members 2 and 3 are fitted into the bracket body 5 from the front side surface of the bracket body 5. Fixed. According to this configuration, the clamp members 2 and 3 are positioned at both end portions of the bracket body 5. Thereby, it is easier to set the clamp members 2 and 3 on the bracket body 5.

  Moreover, since the bracket main-body part 5 is concave shape, the clamp members 2 and 3 are engage | inserted inside the concave shape, and the clamp members 2 and 3 are located in the back surface side of the front board 23 (refer FIG. 3). ) When the attachment moves, the hydraulic hose 32 bends, but the clamp members 2 and 3 are in the position of FIG. 3 (the back side of the front plate 23), so that the hydraulic hose 32 interferes with the front plate 23. prevent.

  Moreover, in this embodiment, the bracket main-body part 5 is located in the back side of the front board 23, and the distance between the bottom face S1 of the bracket main-body part 5 and the back surface S2 of the front board 23 is a pair of clamp which hold | maintained the hydraulic hose 32. The thicknesses of the members 2 and 3 are not less than t. According to this configuration, the hydraulic hose 32 does not contact the back surface of the front plate 23.

(Modification of hose clamp)
FIG. 7 is a view showing a modification of the hose clamp 1 shown in FIG. The difference between the hose clamp 52 according to this modification and the hose clamp 1 shown in FIG. 6 and the like is that the hose clamp 52 does not have the spacer member 10 and the pressing plate 7. Thus, the hose clamp 52 according to the present modification has a simple configuration. In addition, regarding the hose clamp 52, the same code | symbol is attached | subjected about the same components as the hose clamp 1. FIG.

  Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various modifications can be made as long as they are described in the claims.

1: Hose clamp 2, 3: Clamp member 4: Bracket 5: Bracket body 6: Mounting rib 20: Upper frame 21: Bottom plate 22: Vertical plate 23: Front plate 23a: U-shaped notches 32, 33: Hydraulic hose 41: Lower traveling body 42: Upper turning body 44: Boom 45: Arm 46: Bucket 100: Hydraulic excavator

Claims (5)

A hydraulic hose arrangement structure for arranging a hydraulic hose on the back side of a front plate arranged between a pair of vertical plates constituting an upper frame of a construction machine,
A clamp member for holding a hydraulic hose;
A bracket having a bracket body to which the clamp member is attached, and ribs for attachment to the front plate, provided at both ends of the bracket body;
With
The front plate is provided with a notch,
The hydraulic hose arrangement structure, wherein the mounting ribs are fixed to both left and right end portions of the notch portion in a state where the bracket main body portion is positioned inside the notch portion. In the hydraulic hose arrangement structure according to claim 1,
The hydraulic hose arrangement structure, wherein the mounting rib is fixed to a front surface of the front plate. In the hydraulic hose arrangement structure according to claim 1 or 2,
The hydraulic hose arrangement structure, wherein the notch has a U shape with an opening at a rear end side of the front plate. In the hydraulic hose arrangement structure according to any one of claims 1 to 3,
The bracket body is concave,
Fit the clamp member inside the concave shape and enclose it,
The hydraulic hose arrangement structure, wherein the clamp member is positioned on the back side of the front plate. In the hydraulic hose arrangement structure according to any one of claims 1 to 4,
The bracket body is located on the back side of the front plate,
The hydraulic hose arrangement structure characterized in that the distance between the bottom surface of the bracket body and the back surface of the front plate is equal to or greater than the thickness of the pair of clamp members holding the hydraulic hose.