JP2002070068A - Installation structure for piping of working machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To protect hydraulic piping in a working machine having a boom mounted rotatably on a swiveling body constituted in such a manner as to be able to swivel, an arm mounted rotatably on the boom, and a working attachment mounted rotatably on the arm. SOLUTION: The hydraulic piping 42 disposed between the boom 6 and a cover 41 is fixed through an integrally constituted holding implement 47, and electric wiring 44 is disposed in the lateral section of the hydraulic piping 42.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technique of a pipe mounting structure for a working machine disposed on a turning work vehicle.

[0002]

2. Description of the Related Art Conventionally, in a turning work vehicle equipped with an excavating work machine such as a backhoe, a boom, an arm, and a work attachment constituting the work machine are driven by a hydraulic actuator such as a hydraulic cylinder. ,
Hydraulic actuators of these working machines are supplied with pressurized oil through hydraulic hoses from hydraulic pumps disposed on the revolving superstructure. Hydraulic hoses for supplying pressurized oil to the arm cylinder and the bucket cylinder are piped along the back surface of the boom, and are fixed to the back surface of the boom in several places by fixing brackets. A hydraulic hose that supplies pressure oil to a boom cylinder disposed in front of the boom passes through a boom bracket that rotatably supports the boom and is connected to the boom cylinder. And, the hydraulic hose that is piped to the base end of the boom that performs the pivoting operation and the connecting portion between the arm and the boom has been bent so as to be able to follow the pivoting operation. The boom cylinder is provided with a cylinder cover for covering and protecting the front of the boom cylinder.

[0003]

However, as described above,
If hydraulic hoses that supply hydraulic oil to hydraulic actuators such as arms and work attachments were piped along the back of the boom and fixed at several places with mounting brackets, the appearance would not be good, Also, if the hydraulic hose is damaged, the pressurized oil scatters around the boom, soiling the working machine and the turning work vehicle, and may cause an operator. The hydraulic hose piped to the base end of the boom passes through the boom bracket, and the hydraulic hose piped to the connection between the arm and the boom passes between the attachment cylinder brackets that support the attachment cylinder at the base end of the arm. The hydraulic hose is passed through to prevent the hydraulic hose from colliding with an obstacle or the like and being damaged.However, in these parts, the hydraulic hose is bent and piped. There was a risk that the hydraulic hose would protrude outside and collide with obstacles and be damaged.

[0004]

In order to solve the above problems, the present invention uses the following means. 2. A boom rotatably attached to a revolving structure that is pivotable, an arm rotatably attached to the boom, and a work attachment rotatably attached to the arm. In the pipe mounting structure for a working machine having the above, the hydraulic pipe provided between the boom and the cover is fixed via an integrally formed holder.

According to a second aspect of the present invention, a boom rotatably attached to a revolving body which is configured to be pivotable, an arm rotatably attached to the boom, and a rotatably attached to the arm. In a pipe attachment structure for a working machine having a work attachment, a hydraulic pipe is provided between a boom and a cover.

[0006]

Next, an embodiment of the present invention will be described with reference to the drawings. 1 is an overall side view of the turning vehicle, FIG. 2 is a plan view thereof, FIG. 3 is a front view thereof, FIG. 4 is a rear view thereof, FIG. 5 is a side view showing a bonnet rotating configuration, FIG. FIG. 7 is a side view showing a lower configuration of the boom, FIG. 7 is a plan sectional view showing a holding configuration of the hydraulic piping, and FIG.
FIG. 9 is a plan sectional view showing a configuration for holding the hydraulic piping when protecting the electric wiring, and FIG. 9 is a perspective assembly view of the same.

The construction of the turning work vehicle of the present invention will be described. This will be described with reference to FIGS. The turning work vehicle supports a revolving unit 2 at the upper center of the crawler-type traveling device 1 so as to be able to turn left and right. are doing. Above the revolving superstructure 2, a bonnet 14 for covering an engine or the like
And a seat 16 is attached above the hood 14. In front of the seat 16, there is provided a driving operation unit 15 which is configured by arranging levers for performing driving operation and the like on a front column 19. A step 20 is arranged between the front column 19 and the bonnet 14 of the operation section 15.

[0008] A boom bracket 1 is provided at the front end of the revolving unit 2.
The lower end of the boom 6 is supported on the boom bracket 12 so as to be vertically rotatable. The boom 6 is bent forward at an intermediate portion, and is formed in a substantially “C” shape having a bent portion 6d in a side view. An arm 5 is rotatably supported at an upper end of the boom 6, and a bucket 4 as a work attachment is rotatably supported at a tip of the arm 5. A working machine 7 is configured by the boom 6, the arm 5, the bucket 4, and the like.

The boom 6 is connected to the boom cylinder 1
1, the arm 5 is rotated by the arm cylinder 10
The bucket 4 is rotated by the
Is rotated. The boom cylinder 11, the arm cylinder 10, and the bucket cylinder 9 are configured as hydraulic cylinders.
The hydraulic pump is provided in the bonnet 14 and supplied with hydraulic oil through a hydraulic hose to be driven to expand and contract. The boom cylinder 11 is a boom bracket 1
The arm cylinder 10 is interposed between the cylinder supporting portion 12b of the second boom 2 and a boom cylinder bracket 36 provided on the front of the middle of the boom 6, and the arm cylinder 10 is provided with an arm cylinder bottom bracket 31 and an arm
The bucket cylinder 9 is interposed between the bucket cylinder bracket 30 and the bucket bracket 29 connected to the bucket 4.

An opening 31 is provided in the lower part of the revolving structure 2, and a cylinder rod of the swing cylinder 32 projects from the opening 31. The rear end of the swing cylinder 32 is rotatably supported by the frame 17 of the revolving unit 2. The tip of a cylinder rod of the swing cylinder 32 is connected to the boom bracket 12, and the boom bracket 12 is rotated left and right with respect to the revolving unit 2 by the swing cylinder 32.

The frame 17 is formed integrally with a counterweight at the rear of the revolving superstructure 2. At the front, the frame 17 pivotally supports the boom bracket 12,
The rear part constitutes a counterweight. The boom bracket 12 is rotatably supported at the front of the frame 17. The central portion of the frame 17 constitutes a lower portion of the revolving structure 2 and connects a rear counterweight portion.

A side opening 14b is provided on the side of the revolving unit 2, and a rear opening 52 and a lower opening 5 are provided at the rear.
3 are provided. The side opening 14 b is provided on the left side of the hood 14. A radiator is provided inside the side opening 14b, and the side opening 1 is provided.
It is cooled by the air taken in from 4b. The rear opening 52 is provided above the rear of the frame 17, and the lower opening 53 is provided at the lower rear of the frame 17. The air introduced through the side opening 14b is discharged from the revolving unit 2 through the rear opening 52 and the lower opening 53.

The hood 14 provided on the revolving superstructure 2 is
As shown in FIG. 5, it is configured to be rotatable backward.
The bonnet 14 is rotatably connected to the rear upper portion of the frame 17 at the lower rear portion. When the bonnet 14 is closed, the lower end of the bonnet 14 is locked by a locking tool or the like at a position where the lower end of the bonnet 14 abuts on the step 20, and is held in a closed state. When the engine or the like is to be serviced, the locking tool and the like are released and the hood 14 is rotated rearward.

Next, the structure of the cover 41 of the hydraulic hose disposed on the back of the boom 6 will be described with reference to FIG. The cover 41 is fixed to the lower back surface of the boom 6. Two bolts 45 are inserted into the cover 41 at upper and lower portions, respectively, and are fixed to the boom 6 by four bolts 45. Arm cylinder 10
Alternatively, a hydraulic pipe 42 connected to the bucket cylinder 9
Is extended from the lower part of the step 20 to the front part by the front part of the revolving superstructure 2, and is stored between the cover 41 and the back surface of the boom 6. A work light 43 is provided on a side surface of the boom 6.
4 is supplied with electric power.

Next, a configuration for holding the hydraulic pipe 42 between the cover 41 and the boom 6 will be described with reference to FIG. The cover 41 has a U-shape in cross section, and is disposed with the opening side facing the back of the boom 6. A washer 48 is fixedly provided on the back surface of the boom 6, and a bolt 45 is screwed onto the washer 48. Washer 4
Numerals 8 are provided on the back surface of the boom 6 so as to correspond to upper and lower positions of the cover 41, and two are provided on the right and left sides, respectively. The seat 46 and the holder 47 are inserted into the washers 48, and the hydraulic pipes 42 are held between the seat 46 and the holder 47. The lower part of the holder 47 is cut in an arc shape so as to increase the contact area with the hydraulic pipe 42. In the notched portion, the upper surface of the hydraulic pipe 42 contacts the holder 47 and the lower surface contacts the seat 46. In other words, the hydraulic pipe 42 is fixed to the cover 41 at the place where the seat 46 and the holder 47 are fixed.
Is sandwiched by

The sheet 46 and the holder 47 are made of a member such as an elastic member that performs elastic deformation. In the present embodiment, the distance between the cover 41 and the boom 6 is reduced by screwing the bolt 45 onto the washer 48 in the present embodiment. The holder 47 provided between the cover 41 and the boom 6 is pressed against the hydraulic pipe 42, deforms, and comes into close contact with the hydraulic pipe 42. Similarly, the seat 46 is in close contact with the hydraulic pipe 42. Accordingly, the hydraulic pipe 42 is securely held, and the hydraulic pipe 42 does not shift even when the boom 6 rotates.

The holding member 47 is integrally formed, and
The four holding pipes 47 hold the four hydraulic pipes 42. The holder 47 is inserted and fitted into the two washers 48, 48 and positioned. The hydraulic pipes 42 disposed on the left and right of the washer 48 are connected to the boom 6 near the washer 48.
It is something to hold down to the side. Since the hydraulic pipe 42 can be held by one holding tool 47 at one location, the holding tool 47 can be easily assembled, and the reliability of holding the hydraulic pipe 42 is improved. Further, since the seat 46 disposed below the hydraulic pipe 42 is also formed of one member, the assembling can be facilitated.

Next, a configuration for protecting the wiring 44 connected to the work light 43 with the cover 41 will be described with reference to FIG.
This will be described with reference to FIG. The wiring 44 is provided between the cover 41 and the back surface of the boom 6, and is provided on the side of the hydraulic pipe 42. Hydraulic piping 42
As described above, between the cover 41 and the boom 6,
It is provided between the holder 47 and the sheet 46. As shown in FIG.
The wiring 44 is arranged inside the cover 41 so as to cover the inside. In this case, the washers 48 are also arranged so as to be shifted to the side opposite to the wiring 44. Further, a rib 51 is provided inside the cover 41, and the rib 51
4 is extended in the direction of FIG. The rib 51 is provided between the hydraulic pipe 42 and the wiring 44 to avoid contact between the wiring and the pipe 42 and to prevent the wiring 44 from entering the position where the pipe 42 is arranged. Further, by providing the rib 51, the positioning of the wiring 44 on the cover 41 can be easily performed.
And the arrangement of the pipe 42 can be easily performed. By arranging the wiring 44 inside the cover 41, the wiring 44 can be protected,
Wiring does not enter the field of view of the worker and distracts during work.

[0019]

According to the first aspect of the present invention, a boom rotatably mounted on a revolving structure which is rotatable, an arm rotatably mounted on the boom, and a rotatably mounted on the arm. In the pipe mounting structure of the working machine having the work attachment provided, the hydraulic pipe provided between the boom and the cover is fixed via the integrally formed holding tool, so that the fixing configuration of the hydraulic pipe is simplified. And assemblability is improved.

According to a second aspect of the present invention, a boom rotatably attached to a revolving body configured to be pivotable, an arm rotatably attached to the boom, and a rotatably attached to the arm. In a pipe attachment structure for a working machine having a work attachment, a hydraulic pipe is provided between a boom and a cover, and an electric wiring is provided on a side of the hydraulic pipe. The member can protect the electric wiring. In addition, the aesthetic appearance of the boom is improved because the electrical wiring is disposed within the cover.

[Brief description of the drawings]

FIG. 1 is an overall side view of a turning work vehicle.

FIG. 2 is a plan view of the same.

FIG. 3 is a front view of the same.

FIG. 4 is a rear view of the same.

FIG. 5 is a side view showing a hood rotation configuration.

FIG. 6 is a side view showing a lower structure of the swing body and the boom.

FIG. 7 is a plan sectional view showing a configuration for holding a hydraulic pipe.

FIG. 8 is a cross-sectional plan view showing a configuration for holding hydraulic piping when protecting electric wiring.

FIG. 9 is a perspective assembly view of the same.

[Explanation of symbols]

 6 Boom 41 Cover 42 Hydraulic piping 44 Wiring 45 Bolt 46 Seat 47 Holder 48 Washer 51 Rib

Claims (2)

[Claims] 1. A boom rotatably mounted on a revolving structure that is configured to be rotatable, an arm rotatably mounted on the boom, and a work attachment rotatably mounted on the arm. In the pipe mounting structure for a working machine according to the above, the hydraulic pipe provided between the boom and the cover is fixed via an integrally formed holding member. 2. A boom rotatably attached to a revolving structure configured to be pivotable, an arm rotatably attached to the boom, and a work attachment rotatably attached to the arm. In a pipe mounting structure for a working machine, a hydraulic pipe is provided between a boom and a cover, and electrical wiring is provided on a side of the hydraulic pipe.