JP2013096051A - Hydraulic hose constraining structure for work machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hydraulic hose constraining structure for a work machine, capable of constraining a hydraulic hose arranged in a relatively narrower space while avoiding the operation of excessive force on an additional clamp mounting bolt by the oscillation of the hydraulic hose, thus avoiding the breakage of a mounting part of an additional clamp over a long period.SOLUTION: Between a plurality of existing clamps 10, 11 for constraining an existing hydraulic hose, a plate-like bracket 46 is bridged and mounted while being fastened jointly with the existing clamps 10, 11 using bolts 48, 49 to be tightened to a vertical plate 2 or the like of a revolving frame of the work machine. Additional clamps 40, 41 for constraining an additional hydraulic hose are mounted on the bracket 46 at positions different from those of the existing clamps 10, 11.

Description

  The present invention relates to a structure for restraining a hydraulic hose in a working machine such as a hydraulic excavator, and more specifically, in a case where it is difficult to install restraint parts for a hydraulic hose because the installation space for the hydraulic hose is narrow. However, it is related to the restraint structure of the hydraulic hose that can be restrained so that the hydraulic hoses do not interfere with each other by using a clamp that restrains the hydraulic hose. Thus, the present invention relates to a structure suitable for adding an additional hydraulic hose to an existing hydraulic hose.

  The hydraulic excavator drives a hydraulic pump by a prime mover such as an engine mounted on the upper swing body, and the hydraulic oil discharged from the hydraulic pump is supplied to the travel motor, the swing motor and the work via a control valve on the upper swing body. Supply to various hydraulic actuators such as hydraulic cylinders provided at the joints of the front. In order to control the control valve, a pilot valve is provided in the lower part of the cab or the like. And in order to connect between a hydraulic pump, a control valve, its pilot valve, and between a control valve and a hydraulic actuator, a hydraulic hose is arrange | positioned in narrow spaces, such as on the turning frame of an upper turning body.

  In order to prevent movement of the hydraulic hose arranged on the swivel frame during operation of the work machine, generally, a mounting seat is provided on the swivel frame, and the hydraulic hose is fixed by a clamp attached to the mounting seat. In the working machine having such a hydraulic hose, when an optional device is arranged, it is necessary to add a hydraulic hose.

  When adding a hydraulic hose in this way, the space to place the added hydraulic hose is narrow, or there are highly flammable items such as a hydraulic hose or electrical harness around, so it is possible to add a screw seat by welding. When this is difficult, conventionally, the hydraulic hose using a clamp is not restrained, and the surface of the hydraulic hose is sometimes protected by a metal protector.

  Moreover, as another prior art when adding a hydraulic hose, as described in Patent Document 1, an additional clamp can be used without adding a new screw seat to the screw seat of the existing hydraulic hose clamp. Some existing clamps are mounted side by side with a common mounting bolt.

  FIG. 10 is a plan view showing a structure which is a kind of attachment structure of the additional clamp described in Patent Document 1, and FIG. 11 is a view taken along arrow I in FIG. FIG. 12 is a plan view showing a structure for attaching this additional clamp. 10 and 11, reference numeral 1 denotes a swing frame of a hydraulic excavator, 1a denotes a reinforcing plate thereof, and 2 denotes one of left and right vertical plates provided on the swing frame 1 so as to protrude upward. The plate 2 serves to reinforce the revolving frame 1 and attaches a boom or boom cylinder (not shown). 3 is a turning device provided between the left and right vertical plates 2, and 3a is the turning motor. Reference numeral 4 denotes a combination of control valves for switching and controlling the supply of hydraulic oil from a hydraulic pump (not shown) to various hydraulic actuators.

  6 is a hydraulic hose for supplying hydraulic oil from a hydraulic pump (not shown) to one side (bottom chamber side or rod chamber) of the boom cylinder, and 7 and 8 are one side (left side or right side) of a lower traveling body (not shown). ) Of hydraulic hoses for supplying hydraulic oil to the travel motor. These hydraulic hoses 7 and 8 are arranged in a space between the inner wall of the vertical plate 2 and the wall surface of the turning motor 3a. 10 and 11 are existing clamps provided for fixing one hydraulic hose 6 of the two hydraulic hoses for the boom cylinder to the vertical plate 2, and 12 is for fixing the hydraulic hoses 7 and 8 to the vertical plate 2. Is an existing clamp.

  14 is a hydraulic hose for supplying hydraulic oil to an optional device such as a breaker or a crusher. In the case of a breaker, this hydraulic hose 14 is connected to a pressure chamber for supplying pressure oil. In the case of a crusher, the hydraulic hose 14 is connected to a pressure chamber that supplies hydraulic oil when the crusher is closed. As an optional hydraulic hose, in addition to the hydraulic hose 14 in the case of a breaker, there is a hydraulic hose that is used as a return circuit, and in the case of a crusher, supplies hydraulic oil when the crusher is opened. The hydraulic hose is not shown in the figure because it is arranged in other parts on the revolving frame 1.

  Reference numerals 15 and 16 denote additional clamps which are fixedly attached to the existing clamps 10 and 11 in order to fix the additional hydraulic hose 14. As shown in FIG. 12, these additional clamps 15 and 16 overlap the existing clamps 10 and 11, respectively. Then, these existing clamps 10 and 11, additional clamps 15 and 16, and bolts 18 and 18 for fastening that are inserted into bolt insertion holes provided in the vertical plate 2 are attached to nuts 19 and 19 welded to the back surface of the vertical plate 3. The additional clamps 15 and 16 are attached by screwing and fastening.

  FIG. 13 is a plan view showing another conventional example of the attachment structure of the additional clamp, FIG. 14 is a view taken along the arrow J, and FIG. 15 is a plan view showing the attachment structure of the additional clamp. In the conventional example of this figure, a plate-like bracket 22 is attached by joint fastening using the bolt 18 for fastening the existing clamps 10 and 11 to the vertical plate 2, and the additional hydraulic hose 14 is restrained to each bracket 22. For this purpose, additional clamps 24 and 25 are attached. Reference numeral 26 denotes a fastening bolt for the additional clamps 24 and 25, and 27 denotes a nut for screwing these bolts 26 together.

JP 2000-73393 A

  However, in the case of the conventional example in which the hydraulic hose to be added is not constrained by the clamp and is protected by covering the hydraulic hose with a metal protector, the hydraulic hose protected only with the metal protector is not subject to vibration or hydraulic pulsation. There is a problem that the protector may be damaged by the swinging of the hydraulic hose due to the damage, the protector may damage surrounding parts, or the hydraulic hose itself to be protected may be damaged.

  Further, even if the mounting structure of the additional clamps 15 and 16 shown in FIGS. 10 to 12 is adopted, it must be mounted on the existing clamps 15 and 16 in a narrow space between the turning motor 3a and the vertical plate 2. In a narrow space, it becomes difficult to adopt.

  In addition, in the structure in which the additional clamps 24 and 25 shown in FIGS. 13 to 15 are attached to the existing clamps 10 and 11 via the bracket 22 in a cantilever manner, the hydraulic hose swings due to vibration of the airframe or hydraulic pulsation, There is a problem that an excessive force acts on the bolts 18 that fasten the bracket 22 to the existing clamps 10 and 11 and the bolts 18 are easily damaged.

  In view of the above-described problems, the present invention can dispose and restrain the hydraulic hose in a relatively narrow space in the work machine, and excessively attach the additional clamp mounting bolt to the clamp by the swing of the hydraulic hose. It is an object of the present invention to provide a hydraulic hose restraint structure in which the action of force is avoided and damage to the attachment portion of the additional clamp can be avoided over a long period of time.

The hydraulic hose restraining structure of the working machine according to claim 1 is:
A plate-like bracket is attached to a plurality of existing clamps that restrain an existing hydraulic hose together with a bolt that is fastened to the clamp mounting portion of the work machine together with the existing clamp, and is attached in a bridge shape,
An additional clamp for restraining an additional hydraulic hose is attached to the bracket at a position different from the existing clamp.

  According to the present invention, since the bracket for attaching the additional clamp is attached to a plurality of existing clamps in a bridging manner by tightening the bolts together, the body is compared with the case where the bracket is attached to the existing clamp in a cantilever manner as in the prior art. Since the stress on the co-fastening bolt caused by the vibration of the hydraulic hose due to vibration or hydraulic pulsation is distributed to the co-fastening bolts to which multiple existing clamps are attached, the load on the co-tightening bolt is reduced and the co-tightening bolt is used. Bolt damage is prevented.

  In addition, a bracket is attached to multiple existing clamps with bolts for joint tightening, and an additional clamp is attached to this bracket. Since the burden on the bolts for joint fastening is reduced, the distance that separates the additional clamp from the position of the existing clamp The mounting hose can be expanded, the mounting structure variation can be expanded, the structure of the bracket adapted to the complicated space can be realized, and the mounting position of the additional clamp to the bracket can be set, and the hydraulic hose suitable for the actual situation The restraint structure can be realized.

It is a perspective view which shows an example of the working machine to which the restraint structure of the hydraulic hose of this invention is applied. It is a top view which shows an example of the site | part to which the restraint structure of the hydraulic hose of this invention is applied. FIG. 3 is a view taken in the direction of arrow E in FIG. 2. It is a top view which shows one Embodiment of the restraint structure of the hydraulic hose of this invention. It is F arrow line view of FIG. It is GG sectional drawing of FIG. It is the H arrow line view of FIG. 5 which shows the attachment structure of the additional clamp of this Embodiment. It is a top view which shows the attachment structure of the additional clamp of this Embodiment. (A) is a front view showing an additional clamp of the present embodiment, (B) is a side view thereof, (C) is a plan view thereof, and (D) and (E) are this additional clamp on the back side and front side, respectively. It is the perspective view seen more. It is a top view which shows the prior art example of the restraint structure by the additional clamp of a hydraulic hose. It is I arrow directional view of FIG. It is a top view which shows the attachment structure of the conventional additional clamp shown in FIG. 10, FIG. It is a top view which shows the other conventional example of the restraint structure by the additional clamp of a hydraulic hose. It is a J arrow line view of FIG. It is a top view which shows the attachment structure of the conventional additional clamp shown in FIG. 13, FIG.

  FIG. 1 is a perspective view showing a hydraulic excavator as an example of a working machine to which the hydraulic hose restraint structure of the present invention is applied. In FIG. 1, reference numeral 30 denotes a lower traveling body, and a turning frame 1 is installed on the lower traveling body 30 via a turning device 3. The revolving frame 1 is mounted with a power unit 31 including a prime mover and a hydraulic pump driven by the prime mover, the control valve combination 4 (see FIG. 2), a cab 32, and the like.

  Further, a boom 34 is attached to the revolving frame 1 between the left and right vertical plates 2 (only one vertical plate 2 is shown in FIG. 2) and can be raised and lowered by a boom cylinder 33. An arm 36 is attached to the tip of the arm 36 so as to be rotatable by an arm cylinder 35, and a bucket 38 is attached to the tip of the arm 36 so as to be rotatable by a bucket cylinder 37. This hydraulic excavator is equipped with a breaker that vibrates the chisel by pressure oil from a hydraulic pump instead of the bucket 38, and other working tools such as a bowl-shaped crusher, and is adapted to the functions of dismantling, crushing work and other working tools In this case, the hydraulic hose 14 is additionally used as an option.

  FIG. 2 is a plan view showing a state before the hydraulic hose 14 is provided in the hydraulic excavator, and FIG. 2 and 3, the same reference numerals as those in FIGS. 10 to 15 indicate the same parts and portions, and therefore, duplicate description is omitted.

  4 is a plan view showing a state in which a hydraulic hose 14 for supplying hydraulic oil to an optional device is provided, FIG. 5 is a view as seen from the direction of arrow F in FIG. 4, and FIG. 6 shows a structure for attaching a clamp for attaching the hydraulic hose 14. It is GG sectional drawing of FIG. As shown in FIGS. 2, 4, and 6, the space between the vertical plate 2 provided on the revolving frame 1 and the revolving motor 3 a is narrow, and the hydraulic hose 14 is used in this space by using additional clamps 40 and 41. Is placed and restrained. In FIG. 5, 42 is a hydraulic pipe connected to an actuator (not shown) added as an option. This hydraulic pipe 42 is restrained by the vertical plate 2 by a clamp 43, and the hydraulic hose 14, the hydraulic pipe 41, Are connected by a joint 44.

  7 is a view taken in the direction of the arrow H in FIG. 5 showing the mounting structure of the additional clamps 40 and 41 in FIG. 6, and FIG. 8 is a plan view showing the mounting structure of the clamp. As shown in FIGS. 7 and 8, the additional clamps 40 and 41 are attached to the existing clamps 10 and 11 via plate-like brackets 46 attached to the plurality of existing clamps 10 and 11 in a bridging manner.

  FIG. 9 is a view showing a bracket 46 used for attaching the clamp. The bracket 46 has mounting holes 46a and 46b for mounting to the existing clamps 10 and 11 by fastening together. Further, an attachment hole 46c for attaching the additional clamp 40 is formed on one end side of the bracket 46, and a nut 46d for attaching the additional clamp 40 is welded to the back surface of the portion where the attachment hole 46c is attached. Further, a seat screw 46f having a screw hole 46e for attaching the additional clamp 41 is welded to the other end side of the bracket 46 on the surface thereof.

  As shown in FIG. 8, the existing clamp 10 includes two pieces 10 a and 10 b that sandwich the hydraulic hose 6, and each piece has a bolt insertion hole 50 through which a bolt 48 is inserted. Similarly, the existing clamp 11 includes two pieces 11a and 11b that sandwich the hydraulic hose 6, and each piece has a bolt insertion hole 51 through which a bolt 49 is inserted. As shown in FIG. 7, each piece 10 a, 10 b, 11 a, 11 b has a semicircular recess for holding the hydraulic hose 6. Further, as shown in FIG. 8, the vertical plate 2 is provided with bolt insertion holes 52 and 53 through which the bolts 48 and 49 are inserted, and bolts are respectively provided on the back surface of the vertical plate 2 provided with these bolt insertion holes 52 and 53. Nuts 54 and 55 for screwing 48 and 49 are welded.

  The additional clamp 40 includes two pieces 40 a and 40 b that sandwich the hydraulic hose 14, and each piece has a bolt insertion hole 59 through which the bolt 57 is inserted. Similarly, the additional clamp 41 includes two pieces 41a and 41b that sandwich the hydraulic hose 14, and each piece has a bolt insertion hole 60 through which a bolt 58 is inserted. The pieces 40 a, 40 b, 41 a, 41 b of these additional clamps 40, 41 also have a semicircular recess for holding the hydraulic hose 14.

  As shown in FIG. 8, the bracket 46 is attached to the existing clamps 10 and 11 by overlapping the bracket 46 on the existing clamps 10 and 11, and the bolts 48 and 49 for fastening together are bolt insertion holes 50 of the existing clamps 10 and 11. 51 and the vertical plate 2 are inserted into the bolt insertion holes 52 and 53, screwed into the nuts 54 and 55, and fastened.

  Further, the additional clamps 40 and 41 are attached to the bracket 46 by overlapping the additional clamps 40 and 41 with the bracket 46 and inserting the bolts 57 and 58 into the bolt insertion holes 59 and 60 of the additional clamps 40 and 41, respectively. This is performed by screwing into the screw hole 46e of the seat screw 4f and fastening.

  As described above, in the present embodiment, the bracket 46 for attaching the additional clamps 40 and 41 is attached to the plurality of existing clamps 10 and 11 by fastening the bolts 48 and 49 together. Compared with the conventional structure to be attached to the bolt, when the plurality of existing clamps 10 and 11 are attached to the fastening bolts 48 and 49 due to the vibration of the airframe or the swing of the hydraulic hose accompanying the hydraulic pulsation, 49, the burden on the fastening bolts 48, 49 is reduced, and damage to the fastening bolts 48, 49 is prevented.

  Further, as shown in FIG. 8, the additional clamps 40 and 41 are indicated by a distance L larger than the width W of the existing clamps 10 and 11 (the width in the axial direction of the hydraulic hose gripped by the existing clamps 10 and 11). It is possible to install them separately. For this reason, it can be adapted to a complicated space such as between the swing motor 3a and the vertical plate 2, and the degree of freedom of the mounting position of the additional clamps 40, 41 with respect to the bracket 46 is increased, and the hydraulic hose suitable for the actual situation can be obtained. A restraint structure can be realized. Further, it is possible to realize a structure suitable for a space structure such as forming a bent portion of the bracket at a position away from the existing clamps 10 and 11.

  The present invention can also be applied to the case where an additional clamp is provided in a portion other than the space between the turning motor 3a and the vertical plate 2. The present invention can also be applied to other hydraulic working machines other than hydraulic excavators. Moreover, when implementing this invention, a various change and addition are possible in the range which does not deviate from the summary of this invention.

  1: turning frame, 2: vertical plate, 3: turning device, 3a: turning motor, 4: control valve combination body, 10, 11: existing clamp, 14: additional hydraulic hose, 30: lower traveling body, 31: power unit, 32: cab, 33: boom cylinder, 34: boom, 35: arm cylinder, 36: arm, 37: bucket cylinder, 38: bucket, 40, 41: additional clamp, 46: bracket, 46a, 46b: mounting hole, 46d: nut, 46f: seat screw, 48, 49: bolt for joint fastening, 54, 55: nut, 58, 59: bolt

Claims (1)

A plate-like bracket is attached to a plurality of existing clamps that restrain an existing hydraulic hose together with a bolt that is fastened to the clamp mounting portion of the work machine together with the existing clamp, and is attached in a bridge shape,
A hydraulic hose restraint structure for a working machine, wherein an additional clamp for restraining an additional hydraulic hose is attached to the bracket at a position different from the existing clamp.

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