JPH0671988U - Pipe mounting device for construction machinery - Google Patents

Abstract

(57) [Summary] [Purpose] In the pipe mounting device of the prior art, the part of the steel pipe in the middle of the pipe is clamped and fixed to the block with screw holes by the holding metal fitting and the tightening bolt. Therefore, when tightening the steel pipe, the tightening position in the longitudinal direction of the steel pipe cannot be fixed at an accurate position, and the hydraulic hose is
Occasionally, contact interference occurred when the arm was rotated. This problem is solved. [Structure] In the pipe mounting device of the present invention, a bracket plate is fixedly provided on the side surface of the boom, and a relay pipe is fitted into each of a plurality of through holes opened in the bracket plate.
The bores of the plurality of relay pipes are positioned and fixed in the longitudinal direction of the boom, oil pipe connection portions are formed at both ends of the relay pipes, and oil pipes are connected to the oil pipe connection portions at both ends of the relay pipes. As configured.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention mainly relates to a construction machine such as a hydraulic excavator, a hydraulic / pneumatic pipe mounting device equipped on a work vehicle.

[0002]

[Prior art]

 FIG. 6 is a side view of a hydraulic excavator equipped with a pipe mounting device 1 of the related art. In the figure, 2 is an upper revolving structure which is the body of a hydraulic excavator, 3 is a lower traveling structure, 4 is a side digging attachment mounted on the front part of the upper revolving structure 2, and 5 is a rear boom of the side digging attachment 4. , 6 is a front boom, 7 is an upper boom, 8 is an arm, 9 is a bucket, 10 is a boom cylinder, 11 is an arm cylinder, 12 is a bucket cylinder, 13 is an offset cylinder, 14 is a pipe leading to the arm cylinder 11, and 15 is a bucket. A pipe communicating with the cylinder 12 and a pipe 16 communicating with the offset cylinder 13. FIG. 7 is a view showing the pipe mounting device 1 as seen from AA in FIG. In the figure, 17, 18 and 19 are screw hole blocks welded to the side view of the rear boom 5, and 20, 21 and 22 are pressers which are attached so as to face the screw hole blocks 17, 18, and 19, respectively. Metal fittings 23 are tightening bolts. As shown in FIGS. 6 and 7, in the conventional pipe mounting apparatus 1, the pipes 14, 15 and 16 are respectively provided between the block 17 with screw holes 17, 18 and 19 and the press fittings 20, 21 and 22. It is clamped by a tightening bolt 23.

[0003]

[Problems to be solved by the device]

 In many hydraulic excavators, a plurality of hydraulic pipes are arranged side by side along the longitudinal direction of the boom or arm attached to the front part of the hydraulic excavator. A hydraulic hose is used in the vicinity of the pin joint, which is the pivotal joint between the boom tip and the arm base, to prevent pivotal interference. In the conventional pipe mounting device, the portion of the steel pipe in the middle of the pipe is clamped and fixed to the block with screw holes by the holding metal fitting and the tightening bolt. Therefore, when tightening the above-mentioned steel pipe, the tightening position in the longitudinal direction of the steel pipe could not be fixed at an accurate position, and the hydraulic hose could cause contact interference when the boom and arm were rotated. . The present invention aims to solve the above problems.

[0004]

[Means for Solving the Problems]

 The present invention is a construction in which a boom, an arm, a bucket, etc. are connected to a front portion of a vehicle body so as to be rotatable by hydraulic actuators, and pressure oil from a hydraulic source is supplied to the hydraulic actuators through pipes. In the machine, a bracket plate is fixed to the boom or arm, multiple through holes are opened in the bracket plate, relay pipes are inserted into the through holes, and the center direction of the multiple relay pipes is adjusted. Are positioned in the longitudinal direction of the boom or arm, welded and fixed, and oil pipe connection parts are formed at both ends of the relay pipe, and oil pipes are connected to the oil pipe connection parts at both ends of the relay pipe. It was configured to connect to the pipe.

[0005]

【Example】

 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a side view of a main part of a side digging attachment 4'having a pipe mounting device 24 of the present invention. In the figure, the same reference numerals are given to those using the same constituent elements as those in the prior art. 5'is a boom, 25 is a bracket plate of the pipe mounting device 24, 26a and 26b are hydraulic hoses of the pipes leading to the bottom side oil chamber of the arm cylinder 11, and 27a and 27b are bottom side oil chambers of the bucket cylinder 12. The hydraulic hoses of the pipes communicating with each other and 28a and 28b are the hydraulic hoses of the pipes communicating with the bottom side oil chamber of the offset cylinder 13, respectively. FIG. 2 is a detailed view of part B of FIG. In the figure, 29, 30, 31 are through holes formed in the bracket plate 25, and 32B, 33B, 34B are relay pipes. FIG. 3 is a view as seen from CC of FIG. In the figure, 35, 36 and 37 are through holes opened in the bracket plate 25, and 38R, 39R and 40R are relay pipes, respectively. FIG. 4 is a view seen from D in FIG. FIG. 5 is a view showing the oil pipe connecting portions formed at both ends of the relay pipes (32B, 33B, 34B), and a partially cutaway view of the relay pipe 33B is shown as a representative example. In the figure, 41 and 42 are oil pipe connecting portions formed at both ends of the relay pipe 33B. The hydraulic hoses connected to both ends of the relay pipes 38R, 39R, 40R are not shown.

Next, the configuration of the pipe mounting device 24 of the present invention will be described with reference to FIGS. In the pipe mounting device 24 of the present invention, a bracket plate 25 is fixedly installed on the side surface of the boom 5 ', and a plurality of through holes 29, 30, 31, 35, 36, 37 (Fig. 3) is opened and the relay pipes 32B, 33B, 34B, 38R, 39R, 40R are inserted into the through holes, respectively, and the hole center directions of the plurality of interrupted pipes are set substantially in the longitudinal direction of the boom 5 '. Positioning, welding and fixing, and forming oil pipe connection parts (representatively shown in FIG. 5 is a difficult joint type oil pipe connection part 41 and a screw type oil pipe connection part 42) on the respective relay pipe parts, and the relay pipes are formed. (32B, 33B, 34B, 38R, 39R, 40R) By connecting oil pipes such as hydraulic hoses (26a, 26b, 27a, 27b, 28a, 28b shown in FIG. 2) to the oil pipe connecting portions at both ends. It is configured to perform the piping. The oil pipe connecting portion is not limited to the bite joint type and the screw type shown in FIG. 5, but may be a flange joint type or the like if necessary.

Next, the operation of the pipe mounting device 24 of the present invention will be described. According to the present invention, a plurality of relay pipes (32B, 33B, 34B, 38R, 39R, 40R) having oil pipe connection portions formed at both ends of the bracket plate 25 fixedly attached to the side surface of the boom 5'are provided. Is fixed to the boom 5'by welding and fixing it in a substantially longitudinal direction. Therefore, when piping is performed on the side surface of the boom 5 ', oil pipes of a predetermined length (the hydraulic hoses 26a, 26b, 27a, 27b, 28a, 28b shown in FIG. 2 etc.) are provided at both ends of the relay pipe. Connect each. Since the longitudinal position of the relay pipe with respect to the boom 5'and the hole center direction of the relay pipe are accurately positioned and fixed, connecting an oil pipe such as a hydraulic hose of an accurate length to the boom 5 ' The piping can be installed accurately. Therefore, it is possible to prevent the contact interference trouble of the hydraulic hose and the like due to the incorrect mounting of the pipe.

[0008]

[Effect of device]

 In the conventional pipe mounting device, the part of the steel pipe in the middle of the pipe was clamped and fixed to the block with screw holes by the holding metal fitting and the tightening bolt. Therefore, when tightening the above-mentioned steel pipe pipe, it may not be possible to fix the steel pipe in the longitudinal direction at the correct position, and the hydraulic hose may cause contact interference when the boom and arm are rotated. It was However, in the pipe mounting device of the present invention, the bracket plate is fixedly provided on the side surface of the boom, and the relay pipes are inserted into the through holes formed in the bracket plate, respectively, and the plurality of relay pipes are inserted. The bore center direction was positioned and fixed in the longitudinal direction of the boom, the oil pipe connection parts were formed at both ends of the relay pipe, and the oil pipes were connected to the oil pipe connection parts at both ends of the relay pipe. Therefore, when piping is performed on the side surface of the boom, oil pipes such as hydraulic hoses of a predetermined length are connected to both ends of the relay pipe. Since the longitudinal position of the relay pipe with respect to the boom and the hole core direction of the relay pipe are accurately positioned and fixed, connecting the oil pipe such as a hydraulic hose with the correct length will ensure accurate installation of the boom pipe. Can be done in Therefore, it is possible to prevent the contact interference trouble of the hydraulic hose or the like due to the incorrect mounting of the pipe. Therefore, the pipe mounting apparatus of the present invention can improve the positioning accuracy of the pipe.

[Brief description of drawings]

FIG. 1 is a side view of a main part of a side digging attachment equipped with a pipe mounting device of the present invention.

FIG. 2 is a detailed view of a B part in FIG.

FIG. 3 is a diagram viewed from CC in FIG.

FIG. 4 is a view seen from D in FIG.

FIG. 5 is a view showing an oil pipe connecting portion of a relay pipe according to the present invention.

FIG. 6 is a side view of a hydraulic excavator having a pipe mounting device according to a conventional technique.

FIG. 7 is a view showing the pipe mounting device viewed from AA in FIG.

[Explanation of symbols]

1, 24 Pipe mounting device 4, 4'Side digging attachment 5 'Boom 11 Arm cylinder 12 Bucket cylinder 13 Offset cylinder 14, 15, 16 Piping 25 Bracket plate 26a, 26b, 27a, 27b, 28a, 28b Hydraulic hose 29, 30, 31, 35, 36, 37 Through hole 32B, 33B, 34B, 38R, 39R, 40R Relay pipe 41, 42 Oil pipe connection part

Claims (1)

[Scope of utility model registration request] 1. A construction in which a boom, an arm, a bucket, etc. are rotatably connected to a front portion of a vehicle body by hydraulic actuators, and pressure oil from a hydraulic source is supplied to the hydraulic actuators through pipes. In a machine, a bracket plate is fixedly installed on a boom or an arm, a plurality of through holes are opened in the bracket plate, relay pipes are inserted into the through holes, and the hole center directions of the plurality of relay pipes are set. The boom or arm is positioned and fixed in the longitudinal direction, oil pipe connection portions are formed at both ends of the relay pipe, and oil pipes are connected to the oil pipe connection portions at both ends of the relay pipe so that piping is provided for the hydraulic actuator. A pipe mounting device for a construction machine, characterized in that