JP2009243212A - Clamp apparatus for oil hydraulic piping of construction machinery - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce the weight of a clamp apparatus for oil hydraulic pipings, reduce the number of parts and work man-hours, and increase holding power of oil hydraulic pipings. <P>SOLUTION: The clamp apparatus 13 for oil hydraulic pipings of construction machinery is constituted so as to arrange oil hydraulic pipings 12 and 12 in a work machine mounted to an upper turning body and clamp the oil hydraulic pipings 12 and 12 by a clamp member 14. The clamp member 14 is made of a synthetic resin or rubber, and clamp grooves 18 for fitting and clamping the oil hydraulic pipings 12 and 12 are formed in the clamp member 14. The clamp grooves 18 and 18 each have approximately an C-shaped cross section having approximately the same diameter as the outer diameter of the oil hydraulic pipings 12 and 12. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a clamp device for hydraulic piping for construction machines, and more particularly to a clamp device for hydraulic piping for construction machinery configured to clamp hydraulic piping of a working machine mounted on an upper swing body with a clamp member. Is.

  2. Description of the Related Art Conventionally, in a construction machine such as a hydraulic excavator in which an upper swing body is rotatably mounted on a lower traveling body, a work machine including a boom, an arm, a bucket, and the like is disposed in the upper swing body. . A boom cylinder, an arm cylinder, and a bucket cylinder are attached to the boom, arm, and bucket.

  A hydraulic pump as a hydraulic source is installed on the upper swing body (vehicle body) side of the construction machine, and the hydraulic pump and the various cylinders are connected by hydraulic piping. Therefore, the pressure oil delivered from the hydraulic pump is supplied to various cylinders through the hydraulic piping, whereby the boom cylinder, arm cylinder and bucket cylinder are driven independently of each other.

  The hydraulic piping of the construction machine is provided for each boom cylinder, arm cylinder, and bucket cylinder. The hydraulic piping is disposed along the back surface of the boom, and appropriate portions of the hydraulic piping are fixed and held by a hydraulic piping clamping device.

  As shown in FIG. 4 or FIG. 5, for example, a conventional hydraulic piping clamp device is made of a metal upper clamp member (hydraulic piping retainer clamp member) 21 and a lower clamp member which are formed in a square or corrugated shape when viewed from the front. 22 and a bolt (fastening means) 23.

When the hydraulic pipes 24, 24 are clamped by the hydraulic pipe clamping device, the hydraulic pipes 24, 24 are set between the upper clamp member 21 and the lower clamp member 22, and then the upper clamp member 21, the lower clamp member The hydraulic pipes 24 and 24 are clamped between the upper clamp member 21 and the lower clamp member 22 by clamping the bolt 22 with the bolt 23. Reference numeral 25 in the figure denotes a rear surface of the boom or a bracket fixed to the rear surface.
JP-A-11-200408.

  In the above prior art, when the upper clamp member and the lower clamp member are fastened with fastening means such as bolts in order to clamp and fix the hydraulic piping, the operator holds the hydraulic piping with the left hand and holds the tool in the right hand. The bolt must be tightened. For this reason, there has been a problem that the number of work steps at the time of clamping of the hydraulic piping increases and it takes time.

  Moreover, since fastening means such as bolts are required to fasten the upper clamp member and the lower clamp member, the number of parts increases, and in addition, since the upper clamp member and the lower clamp member are formed of a metal material, The overall weight of the clamping device for hydraulic piping increases. Furthermore, when there is a dimensional error of a predetermined value or more in the processing accuracy of the upper clamp member, the lower clamp member or the hydraulic piping, the holding force for the hydraulic piping becomes insufficient.

Therefore, there is a technical problem to be solved in order to reduce the weight of the hydraulic piping clamp device, reduce the number of parts and work, and increase the holding force for the hydraulic piping. 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 characterized in that a hydraulic pipe is disposed on a work machine mounted on an upper swing body, and the hydraulic pipe is connected to a clamp member. In the clamping device for hydraulic piping of a construction machine configured to clamp, the clamping member is formed of synthetic resin or rubber, and the clamp for fitting and fixing the hydraulic piping to the clamping member A clamp device for hydraulic piping of construction machinery having a recessed groove is provided.

  According to this configuration, since the clamp groove is formed in the clamp member made of synthetic resin or rubber, the operator pushes the hydraulic pipe into the clamp groove with one hand, so that the hydraulic pipe is fitted and fixed to the clamp groove. Is done.

  According to a second aspect of the present invention, there is provided a clamp device for a hydraulic pipe for a construction machine according to the first aspect, wherein the clamp groove is formed in a substantially C-shaped cross section having substantially the same diameter as the outer diameter of the hydraulic pipe. .

  According to this structure, the opening edge part of the clamp groove | channel with the substantially C-shaped cross section recessedly provided in the synthetic resin or rubber-made clamp members has required elasticity. Therefore, when the hydraulic pipe is pushed into the clamp groove and fitted and fixed, the opening edge of the clamp groove is elastically deformed, and the outer peripheral surface of the hydraulic pipe is pressed and held.

  According to a third aspect of the present invention, there is provided a clamp device for hydraulic piping for construction machinery according to the first or second aspect, wherein the clamp member is provided with a plurality of the clamp grooves in parallel with each other.

  According to this configuration, since the plurality of clamp grooves are provided in the clamp member in parallel to each other, the plurality of hydraulic pipes are fixed to the same clamp member in the same direction.

  According to the first aspect of the present invention, the hydraulic pipe can be pushed and fitted into the clamp groove of the clamp member with one hand, so that the hydraulic pipe can be quickly fixed with one touch. In this case, fastening means such as metal upper clamp members and bolts, which are conventionally required, are no longer necessary, and the number of parts of the clamp device for hydraulic piping can be greatly reduced. Since the clamp member is made of synthetic resin or rubber, the weight of the entire hydraulic piping clamp device is significantly reduced as compared with the prior art.

  In addition, since the bolt fastening work is not necessary when clamping the hydraulic piping, the number of work steps can be reduced. Further, even when the dimensional accuracy of a hydraulic pipe or the like is low, the error in the dimensional accuracy can be absorbed by the elastic deformation of the opening edge of the clamp groove, so that the holding force for the hydraulic pipe increases.

  In the invention according to claim 2, in the state in which the hydraulic pipe is fitted and fixed to the clamp groove having the substantially C-shaped cross section, the opening edge of the clamp groove presses and holds the outer peripheral surface of the hydraulic pipe. In addition to the effect of the first aspect of the invention, there is a merit that the holding force for the hydraulic piping is further increased.

  Since the invention according to claim 3 can fix the plurality of hydraulic pipes in parallel to one clamp member, in addition to the effect of the invention according to claim 1 or 2, the plurality of hydraulic pipes are arranged neatly at one place. Can be held.

  The present invention aims to reduce the weight of a hydraulic piping clamp device, reduce the number of parts, reduce the number of work steps, and increase the holding force for the hydraulic piping. In the clamping device for hydraulic piping of a construction machine, wherein the hydraulic piping is disposed on the work machine mounted on the construction machine, and the hydraulic piping is clamped by the clamping member, the clamping member is made of synthetic resin or rubber. In addition, the clamp member is provided with a concave recess for fitting and fixing the hydraulic pipe.

  Hereinafter, a preferred embodiment of the present invention will be described with reference to the drawings. FIG. 1 shows a hydraulic excavator as a construction machine to which a hydraulic piping clamp device of the present invention is applied. In the figure, an upper swing body 2 is mounted on a crawler type lower traveling body 1 so as to be rotatable, and a cab 3 is placed on one front side of the upper swing body 2. In addition, a work machine is placed at the front center part of the upper swing body 2, and the work machine is composed of a boom 4, an arm 6, a bucket 8 and various cylinders 5, 7, 9 for driving them.

  More specifically, the boom 4 is attached to the front center portion of the upper swing body 2 so as to be able to be raised and lowered, and an arm 6 is pivotally attached to the tip portion of the boom 4 so as to be swingable. Further, a bucket 8 is pivotally attached to the tip of the arm 6 so as to be rotatable.

  As shown in FIG. 2, a turning motor 10 is provided in the vicinity of the turning center portion of the upper turning body 2, and a control valve 11 is attached to the rear portion of the turning motor 10. The control valve (hydraulic switching adjustment unit) 11 serves to distribute pressure oil generated by a hydraulic pump (not shown) to the swing motor 10, the boom cylinder 5, the arm cylinder 7 and the bucket cylinder 9. ing.

  The control valve 11 and the various cylinders 5, 7, 9 are connected by pipe-shaped hydraulic pipes 12, 12, 12, respectively, and pressure oil is sent to the various cylinders 5, 7, 9 through the hydraulic pipes 12, 12, 12. It is configured to be able to supply. The hydraulic pipes 12, 12, 12 are arranged on the back surface of the boom 4 and / or the arm 6 so as to extend in the longitudinal direction of the boom 4 and / or the arm 6. It is fixed and held by a piping clamping device 13.

  FIG. 3 is a partially cutaway enlarged view showing a hydraulic piping clamp device 13 (hereinafter simply referred to as “clamp device 13”). For convenience of explanation, this figure shows an example in which two hydraulic pipes 12 and 12 are fixed to one clamp device 13, but one or three or more hydraulic pipes are attached to one clamp device 13. 12, 12, and 12 can also be configured to be fixed. Although the hydraulic pipes 12 and 12 in the illustrated example have the same outer diameter, the outer diameters of the hydraulic pipes 12 and 12 may be different from each other. The diameter is set according to the outer diameter of the hydraulic pipes 12 and 12.

  As shown in FIG. 3, the clamp device 13 includes a block-shaped clamp member 14, and a hole 15 having a bottom surface portion is opened at the center of the upper surface of the clamp member 14. The clamp member 14 is formed of a synthetic resin material that can be elastically deformed. However, the clamp member 14 may be formed of a rubber material according to the usage situation.

  Further, the clamp member 14 is fixed directly to the back surface of the boom 4 and / or the arm 6 via a fixing means. In the present embodiment, the fixing means includes a nut 16 integrated by welding on the back surface of the boom 4 and / or the arm 6, and a bolt 17 that is screwed to the nut 16. The bottom surface of the 14 holes 15 is fixed to the back surface of the boom 4 and / or the arm 6. The clamp member 14 can be attached to the back of the boom 4 and / or the arm via a bracket.

Clamp grooves 18 and 18 for fitting and holding the hydraulic pipes 12 and 12 are recessed in the left and right sides of the hole 15 on the upper surface of the clamp member 14. The clamp grooves 18 and 18 are formed to extend in parallel with the longitudinal direction of the boom 4.

  The clamp grooves 18 and 18 are formed in a substantially C-shaped cross section, and the width of the opening edge of the clamp grooves 18 and 18 is set slightly smaller than the diameter of the hydraulic pipes 12 and 12. Furthermore, the diameter of the clamp grooves 18 and 18 is set to be substantially the same as the outer diameter of the hydraulic pipes 12 and 12.

  When the hydraulic pipes 12 and 12 are clamped by the clamp device 13, the operator applies the hydraulic pipes 12 and 12 to the opening edges of the clamp grooves 18 and 18 with one hand, and the hydraulic pipes 12 and 12 are clamped to the clamp grooves 18 and 18, respectively. Just push it into the back of the 18th. As a result, the opening edges of the clamp grooves 18 and 18 are pushed wide by the outer peripheral surface of the hydraulic pipes 12 and 12 in the pushing direction, and the outer peripheral surfaces of the hydraulic pipes 12 and 12 contact the inner peripheral surfaces of the clamp grooves 18 and 18. It moves to the position where it comes into contact and is fitted.

  In this case, since the clamp member 14 is formed of a synthetic resin having a required elastic deformation force, after the hydraulic pipes 12 and 12 are fitted, the opening edges of the clamp grooves 18 and 18 are elastically moved to the inner surface side by the reaction force. The elastically deformed portion is deformed and comes into close contact with the outer peripheral surfaces of the hydraulic pipes 12 and 12 in a pressed state. Therefore, the holding force with respect to the hydraulic pipes 12 and 12 is increased by the pressing action of the opening edges of the clamp grooves 18 and 18, and the hydraulic pipes 12 and 12 are not likely to be detached from the clamp grooves 18 and 18 by an unexpected external force.

  As described above, according to the present invention, since the clamp grooves 18 and 18 are formed in the synthetic resin clamp member 14, the operator pushes the hydraulic pipes 12 and 12 into the clamp grooves 18 and 18 with one hand. The hydraulic pipes 12 and 12 can be fitted and fixed with one touch, and the fixing strength of the hydraulic pipes 12 and 12 is improved. At that time, since the bolt fastening work which has been conventionally required is not required, the number of work steps is reduced.

  Further, the conventional clamping means for the hydraulic pipe presser and the fastening means such as bolts, which are required in the past, become unnecessary, the number of parts of the clamping device 13 is reduced, and the clamping member 14 of the present invention is formed of synthetic resin. Therefore, the weight of the clamping device 13 as a whole can be significantly reduced.

  In particular, even when the dimensional accuracy of the hydraulic pipes 12, 12, etc. is low, the error of the dimensional accuracy of the hydraulic pipes 12, 12 is absorbed by the elastic deformation action of the opening edges of the clamp grooves 18, 18. , 12 is further increased.

  Further, since the plurality of clamp grooves 18, 18... Are provided in the clamp member 14 in parallel with each other, the plurality of hydraulic pipes 12, 12,. Further, the clamping device 13 can be unitized so as to be compatible with a plurality of hydraulic pipes 12, 12... Having different specifications, and a highly flexible layout design can be easily realized.

  In the above-described embodiment, the cross-sectional shape of the clamp grooves 18 and 18 is formed in a substantially C-shape. However, the present invention should not be limited to this, and the elastic deformation force of the clamp member 14, the size of the hydraulic pipes 12 and 12, etc. Depending on the design matters, for example, it may be formed in a U-shape or a substantially semicircular shape.

  It should be noted that 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.

1 is an overall side view of a hydraulic excavator to which a hydraulic piping clamp device of the present invention is applied. The top view of the clamp apparatus for hydraulic piping of FIG. 1 is a partially cutaway enlarged view showing a hydraulic piping clamp device according to an embodiment of the present invention. Explanatory drawing which shows an example of the clamp apparatus for conventional hydraulic piping. Explanatory drawing which shows the other example of the conventional clamp apparatus for hydraulic piping.

Explanation of symbols

4 Boom 12 Hydraulic Piping 13 Hydraulic Piping Clamping Device 14 Clamp Member 15 Hole 16 Nut 17 Bolt 18 Clamp Groove

Claims (3)

In the clamping device for hydraulic piping of a construction machine, in which hydraulic piping is disposed on the working machine mounted on the upper swing body, and the hydraulic piping is configured to be clamped by a clamp member,
The clamp member is formed of synthetic resin or rubber, and a clamp groove for fitting and fixing the hydraulic pipe is recessed in the clamp member. Clamping device.   2. The clamping device for hydraulic piping for construction machines according to claim 1, wherein the clamping groove is formed in a substantially C-shaped section having substantially the same diameter as the outer diameter of the hydraulic piping.   3. The clamping device for hydraulic piping for construction machines according to claim 1, wherein a plurality of said clamping grooves are provided in parallel to each other on said clamping member.

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