JP6152004B2 - Piping structure of construction machinery - Google Patents

Description

  The present invention relates to a piping structure of a construction machine.

  Conventionally, construction machines used for excavation work such as earth and sand are known. Such a construction machine includes a working device that is movable by hydraulic pressure. The working device includes a joint structure, a hydraulic device arranged in the joint structure, and a hydraulic hose connected to the hydraulic device (see, for example, Patent Document 1).

  By the way, the hydraulic hose is guided to the hydraulic equipment through the opening of the turning device. In a conventional construction machine, there is a hydraulic hose that is fixed at the front portion of the swivel device and is bent at the portion (see the arrow portion in FIG. 7). For this reason, in such a construction machine, there are many exposed portions of the hydraulic hose, and there has been concern about the occurrence of damage to the hydraulic hose. Moreover, in the conventional construction machine, the hydraulic hose is fixed in the vertical direction, and some of the hydraulic hoses are bent at a high position (see an arrow portion in FIG. 7). For this reason, in such a construction machine, there is a problem that the hydraulic hose passes in front of the cockpit and the field of view of the operator is narrowed.

JP 2007-16596 A

  An object of the present invention is to provide a piping structure of a construction machine that can reduce the damage of a hydraulic hose and can ensure a wide field of view of an operator.

  The problem to be solved by the present invention is as described above. Next, means for solving the problem will be described.

According to a first aspect of the present invention, there is provided a piping structure for a construction machine including a working device including a joint structure, a hydraulic device disposed in the joint structure, and a hydraulic hose connected to the hydraulic device. And a boom bracket pivotally supported by the support bracket, and the hydraulic hose extends along a vertical direction of a side surface of the support bracket. Guided, curved along the upper surface of the support bracket, and guided along the upper surface of the support bracket .

According to a second aspect of the present invention, a swing frame that supports the support bracket is provided, and the hydraulic hose is guided along a front end portion of an upper surface of the swing frame .

  As effects of the present invention, the following effects can be obtained.

  According to the first aspect of the present invention, the hydraulic hose is guided to the hydraulic equipment through the vicinity of the rotation fulcrum of the joint structure while being fixed in the horizontal direction. Thereby, since the exposed part of a hydraulic hose decreases, the failure case of a hydraulic hose can be reduced. Furthermore, since the hydraulic hose does not pass through the front of the cockpit, the operator's field of view can be secured widely.

The hydraulic hose is guided along the upper surface of the support bracket. Thereby, since the exposed part of the hydraulic hose is shielded by the support bracket, it is possible to reduce damage to the hydraulic hose. Furthermore, since the hydraulic hose does not pass through a high position, a wide field of view for the operator can be secured.

The hydraulic hose is guided along the vertical direction of the side surface of the support bracket, being curved along the upper surface of the support bracket. Thereby, since the exposed part of the hydraulic hose is shielded by the support bracket, it is possible to reduce damage to the hydraulic hose. Moreover, since the hydraulic hose is guided along the vertical direction of the side surface of the support bracket, piping work of the hydraulic hose and the like are facilitated.

According to invention of Claim 2 , a hydraulic hose is guided along the front-end part of the upper surface of a swing frame. As a result, the exposed portion of the hydraulic hose is shielded by the swing frame, so that damage to the hydraulic hose can be reduced.

The perspective view which shows a construction machine. The side view which shows a construction machine. The front view which shows a construction machine. The figure which expanded the area | region Ra in FIG. The figure which expanded the area | region Rb in FIG. The figure which expanded the area | region Rc in FIG. The figure which shows the part corresponded to area | region Ra in the conventional construction machine.

  First, the construction machine (hereinafter referred to as “backhoe”) 100 will be briefly described. The technical idea of the present invention can be applied not only to the backhoe 100 described below but also to other vehicles such as a backhoe loader.

  FIG. 1 is a perspective view showing the backhoe 100. FIG. 2 is a side view thereof, and FIG. 3 is a front view thereof. In addition, in the figure, the front-back direction, the up-down direction, and the left-right direction of the backhoe 100 are represented.

  As shown in FIGS. 1 to 3, the backhoe 100 mainly includes a traveling device 1, a work device 2, and a turning device 3.

  The traveling device 1 causes the backhoe 100 to travel. The traveling device 1 includes a pair of left and right crawlers 11, a hydraulic motor 12 (see FIG. 2), and the like. The traveling device 1 can move forward and backward and turn by the hydraulic motor 12 moving the left and right crawlers 11.

  The work device 2 performs excavation work such as earth and sand. The work device 2 includes a joint structure 21, a hydraulic device 22, a hydraulic hose 23, and the like. The work device 2 enables excavation operation by the hydraulic device 22 moving the joint structure 21. The hydraulic hose 23 guides hydraulic oil supplied to the hydraulic equipment 22 or hydraulic oil discharged by the hydraulic equipment 22.

  The turning device 3 turns the work device 2. The turning device 3 includes a swing frame 31, a hydraulic motor 32 (see FIG. 2), a diesel engine 33 (see FIG. 2), and the like. The turning device 3 enables a right turn or a left turn when the hydraulic motor 32 moves the swing frame 31. The diesel engine 33 drives a hydraulic pump or the like.

  Below, while explaining the structure of the working device 2 in detail, the piping structure of the backhoe 100 which concerns on this embodiment is demonstrated.

  As described above, the work device 2 includes the joint structure 21, the hydraulic device 22, the hydraulic hose 23, and the like.

  The joint structure 21 includes a boom 21a, an arm 21b, and a bucket 21c. The hydraulic equipment 22 in the present application refers to a boom cylinder 22a, an arm cylinder 22b, a bucket cylinder 22c, and hold valves 22d and 22e. Further, the hydraulic hose 23 is represented as hydraulic hoses 23a, 23b, 23c,.

  One end of the boom 21 a is supported by a boom bracket 34, and is rotated by a boom cylinder 22 a that is a hydraulic device 22. More specifically, the boom 21a is rotated by a boom cylinder 22a that expands and contracts around the rotation axis S1 of the boom bracket 34 (see arrow A in FIG. 2). The hydraulic hose 23a is guided to the boom cylinder 22a through the vicinity of the rotation axis S1, which is a rotation fulcrum.

  One end of the arm 21 b is supported by the other end of the boom 21 a and is rotated by an arm cylinder 22 b that is a hydraulic device 22. More specifically, the arm 21b is rotated by an arm cylinder 22b that expands and contracts around the rotation axis S2 of the boom 21a (see arrow B in FIG. 2). The hydraulic hose 23b is guided to the arm cylinder 22b along the boom 21a through the vicinity of the rotation axis S1, which is a rotation fulcrum.

  One end of the bucket 21 c is supported by the other end of the arm 21 b and is rotated by a bucket cylinder 22 c that is a hydraulic device 22. Specifically, the bucket 21c is rotated by a bucket cylinder 22c that expands and contracts around the rotation axis S3 of the arm 21b (see arrow C in FIG. 2). The hydraulic hose 23c passes through the vicinity of the rotation shaft S1, which is a rotation fulcrum, and is guided to the bucket cylinder 22c along the boom 21a and the arm 21b.

  In addition, in the present backhoe 100, a hold valve 22d, which is a hydraulic device 22, is disposed on the boom cylinder 22a (see FIG. 2). A hold valve 22e, which is a hydraulic device 22, is also disposed in the arm cylinder 22b (see FIG. 3). The hold valves 22d and 22e shut off the flow of hydraulic oil so that the bucket 21c does not drop suddenly when the hydraulic hoses 23a and 23b are damaged. The hydraulic hose 23d is guided to the hold valve 22d through the vicinity of the rotation axis S1, which is a rotation fulcrum. Further, the hydraulic hose 23e passes through the vicinity of the rotation axis S1, which is a rotation fulcrum, and is guided to the hold valve 22e along the boom 21a.

  The backhoe 100 according to the present embodiment is characterized by the piping method of the hydraulic hoses 23d and 23e. Therefore, the piping method will be described below by paying attention to the hydraulic hoses 23d and 23e. However, the same piping method can be applied to the other hydraulic hoses 23a, 23b, and 23c. Moreover, it is possible to apply the same piping method also about the hydraulic hose supposing that other hydraulic equipment is provided.

  FIG. 4 is an enlarged view of the region Ra in FIG. FIG. 5 is an enlarged view of the region Rb in FIG. FIG. 6 is an enlarged view of the region Rc in FIG. In addition, in the figure, the front-back direction, the up-down direction, and the left-right direction of the backhoe 100 are represented.

  As shown in FIGS. 4 to 6, the backhoe 100 includes a clamp 35 for fixing the hydraulic hoses 23d and 23e.

  The clamp 35 is formed by bending a metal wire and is welded perpendicularly to the swing frame 31. More specifically, the clamp 35 is formed in a rectangular shape and is welded perpendicular to the left-right direction. For this reason, the hydraulic hoses 23d and 23e pass through the inside of the clamp 35 and are guided in parallel to the left-right direction. In other words, the hydraulic hoses 23d and 23e are fixed in the horizontal direction. The hydraulic hoses 23d and 23e are guided to the hydraulic equipment 22 through the vicinity of the rotation shaft S1 which is a rotation fulcrum.

  As described above, the hydraulic hoses 23d and 23e are guided to the hydraulic equipment 22 (hold valves 22d and 22e) through the vicinity of the rotation fulcrum of the joint structure 21 while being fixed in the horizontal direction. As a result, in the backhoe 100 according to the present embodiment, the exposed portions of the hydraulic hoses 23d and 23e are reduced, so that damage cases of the hydraulic hoses 23d and 23e can be reduced. Furthermore, in the backhoe 100 according to the present embodiment, the hydraulic hoses 23d and 23e do not pass in front of the cockpit, so that the operator's field of view can be secured widely.

  As a matter of note, the hydraulic hoses 23d and 23e are stretched in a straight line without being bent from the clamp 35 to the vicinity of the boom 21a. Therefore, the scooped wood or the like does not catch the bent portions of the hydraulic hoses 23d and 23e. This is a particularly important factor in order to obtain the effect of reducing the damage cases of the hydraulic hoses 23d and 23e.

  Below, the piping structure of this backhoe 100 is demonstrated in detail.

The backhoe 100 includes the boom bracket 34 described above and a support bracket 34 a that pivotally supports the boom bracket 34 . The support bracket 34 a is formed by welding a metal plate. The support bracket 34 a has its upper surface is parallel to the weld relative to the horizontal direction.
Further, the clamp 35 is welded to a position proximate the upper surface of the support bracket 34 a. Accordingly, hydraulic hoses 23d · 23e is the street the inner clamp 35, along the upper surface of the support bracket 34 a (see arrow in FIG. 4).

Thus, hydraulic hoses 23d · 23e is guided along the upper surface of the support bracket 34 a. Thus, the backhoe 100 of the present embodiment, since the exposed portion of the hydraulic hoses 23d · 23e is blocked by the support bracket 34 a, can be reduced damage cases of the hydraulic hoses 23d · 23e. Furthermore, in the backhoe 100 according to the present embodiment, the hydraulic hoses 23d and 23e do not pass through high positions, so that the operator's field of view can be secured widely.

As considerations, hydraulic hoses 23d · 23e without flexing the upper surface of the support bracket 34 a, a state stretched in a straight line. Therefore, not rub the support bracket 34 a swings the hydraulic hoses 23d · 23e. This is a particularly important factor in order to obtain the effect of reducing the damage cases of the hydraulic hoses 23d and 23e.

Furthermore, the support bracket 34 a is a side are welded perpendicularly to the lateral direction. Further, the clamp 35 is welded to a position close from the side surface of the support bracket 34 a. That is, the clamp 35 has an upper surface and a side surface of the support bracket 34 a is welded to the vicinity of the orthogonal portion. Accordingly, hydraulic hoses 23d · 23e, when guided along the side of the support bracket 34 a, passes through the inside of the clamp 35 while being curved, it is of along the upper surface of the support bracket 34 a (arrow in FIG. 5 reference). In the backhoe 100, for ease of piping work or the like of hydraulic hoses 23d · 23e, it is set to be guided along the hydraulic hoses 23d · 23e on the side surface of the support bracket 34 a.

Thus, hydraulic hoses 23d · 23e is guided along the side of the support bracket 34 a, is curved along the upper surface of the support bracket 34 a. Thus, the backhoe 100 of the present embodiment, since the exposed portion of the hydraulic hoses 23d · 23e is blocked by the support bracket 34 a, can be reduced damage cases of the hydraulic hoses 23d · 23e. Further, since the hydraulic hoses 23d · 23e is guided along the side of the support bracket 34 a, plumbing, etc. of the hydraulic hoses 23d · 23e is facilitated. Furthermore, in the backhoe 100 according to the present embodiment, the hydraulic hoses 23d and 23e do not pass through high positions, so that the operator's field of view can be secured widely.

As considerations, hydraulic hoses 23d · 23e without flexing the sides of the support bracket 34 a, a state stretched in a straight line. Therefore, not rub the support bracket 34 a swings the hydraulic hoses 23d · 23e. This is a particularly important factor in order to obtain the effect of reducing the damage cases of the hydraulic hoses 23d and 23e.

The support bracket 34 a is supported by the swing frame 31. Accordingly, hydraulic hoses 23d · 23e, when guided along the upper surface of the swing frame 31, curved at the lower end portion of the support bracket 34 a, is the along the sides of the support bracket 34 a (an arrow in FIG. 6 Part reference). In the backhoe 100, the hydraulic hoses 23d and 23e are guided along the upper surface of the swing frame 31 in consideration of the ease of piping work of the hydraulic hoses 23d and 23e.

Thus, hydraulic hoses 23d · 23e is guided along the upper surface of the swing frame 31, is bent along the side surface of the support bracket 34 a. Thus, the backhoe 100 of the present embodiment, since the exposed portion of the hydraulic hoses 23d · 23e is blocked by the support bracket 34 a, can be reduced damage cases of the hydraulic hoses 23d · 23e. Further, since the hydraulic hoses 23d · 23e is guided along the swing frame 31 and the support bracket 34 a, plumbing, etc. of the hydraulic hoses 23d · 23e is facilitated. Further, in the backhoe 100 according to the present embodiment, the hydraulic hoses 23d and 23e do not pass through a high position, so that the operator's field of view can be secured widely.

  As a matter of note, the hydraulic hoses 23d and 23e are stretched from the clamp 36 to the clamp 36 without being bent on the upper surface of the swing frame 31. Therefore, the hydraulic hoses 23d and 23e are not shaken and rubbed against the swing frame 31 and other structures. This is a particularly important factor in order to obtain the effect of reducing the damage cases of the hydraulic hoses 23d and 23e.

  Other feature points will be described below.

In the backhoe 100, hydraulic hoses 23a · 23b · 23c passes the vicinity of the pivot point of the joint structure 21 out of the hole provided in the support bracket 34 a, a hydraulic device 22 (the boom cylinder 22a, an arm cylinder 22b , Bucket cylinder 22c,). Therefore, hydraulic hoses 23d · 23e merges above the hydraulic hose 23a · 23b · 23c supporting bracket 34 a, in bundled state is from passing in the vicinity of the pivot point of the joint structure 21. This prevents the hydraulic hoses 23a, 23b, 23c,... From being disturbed even when the joint structure 21 is excavated. Further, the hydraulic hoses 23a, 23b, 23c,... Sway and do not rub against other structures. In particular, since the hydraulic hoses 23d and 23e pass through the vicinity of the rotation fulcrum of the joint structure 21 while being fixed in the horizontal direction, the hydraulic hoses 23d and 23e have an advantage that the swing width is further reduced.

100 backhoe (construction machinery)
DESCRIPTION OF SYMBOLS 1 Traveling device 11 Crawler 12 Hydraulic motor 2 Working device 21 Joint structure 22 Hydraulic equipment 23 Hydraulic hose 3 Turning device 31 Swing frame 32 Hydraulic motor 33 Diesel engine 34 Boom bracket
34a Support bracket 35 Clamp

Claims (2)

A piping structure of a construction machine including a joint device, a hydraulic device arranged in the joint structure, and a hydraulic hose connected to the hydraulic device,
A support bracket that rotatably supports the joint structure in the left-right direction; and a boom bracket that is pivotally supported by the support bracket;
The hydraulic hose is
Guided along the vertical direction of the side surface of the support bracket,
Curved along the upper surface of the support bracket,
A piping structure for a construction machine, which is guided along an upper surface of the support bracket . A swing frame for supporting the support bracket;
The hydraulic hose is
The piping structure for a construction machine according to claim 1, wherein the piping structure is guided along a front end portion of an upper surface of the swing frame .

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