JP2002194768A - Mounting structure for hydraulic valve - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable a pilot valve to be easily mounted by means of a simplified structure. SOLUTION: Constitutionally, the pilot valve 33, whose outer periphery is equipped protrusively with a flange part 35, is inserted into an attaching opening 46 formed in a supporting base 41, and the flange part 35 is fastened to the periphery of the attaching opening 46 of the supporting base 41 with a bolt. The supporting base 41 is formed with an inserting opening 47, which communicates with the attaching opening 46 and whereinto the pilot valve 33 can be inserted from a lateral side toward the attaching opening 46. Additionally, a bolt inserting hole is formed in the flange part 35, and a stud bolt 48 inserted into the bolt inserting hole is installed in a standing manner around the attaching opening 46 of the supporting base 41.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hydraulic valve mounting structure.

[0002]

2. Description of the Related Art Some construction machines such as backhoes are provided with a control table having operation levers on the left and right sides of a driver's seat. Inside the control table, a driving machine such as an excavator or a turning motor is driven. Is provided with a pilot valve for operating a control valve for controlling the hydraulic actuator according to the pilot pressure. As shown in FIG. 7, the pilot valve 70 has an operation lever 71 attached to the upper part and a hydraulic pipe connected to the lower part.
2 are provided.

On the other hand, a support table 73 for supporting the pilot valve 70 is provided on the control table 69.
Is formed of a plate material bent in a substantially U-shape, and a mounting port 74 penetrating vertically is formed in an upper wall thereof, and a pilot valve 70 is inserted into the mounting port 74. The mounting port 74 is formed as a relatively large opening for vertically inserting the pilot valve 70, and the flange portion 72 cannot be directly attached to the support base 73. , A mounting plate 75 for mounting the flange portion 72 was separately mounted.

[0004]

In the above conventional structure, the mounting plate 75 is attached to the upper wall of the support base 73 by four bolts, and the flange is fixed to the mounting plate 75 by four bolts. Was attached. Therefore, bolts 76 must be inserted into a total of eight places and nuts must be tightened, which complicates the operation, increases the number of assembling steps, and increases the cost. Also,
Since the mounting plate 75 is required, the number of parts increases.

In order to remove the pilot valve 70 for maintenance or the like, it is necessary to completely remove the bolt and the nut, which makes the operation very troublesome and the possibility of the bolt being lost is large. there were. The present invention simplifies the mounting structure of the hydraulic valve, reduces assembly man-hours,
It is an object of the present invention to provide a hydraulic valve mounting structure in which the number of parts is reduced and maintenance is improved.

[0006]

The present invention employs the following technical means to achieve the above object. That is, according to the present invention, the hydraulic valve 33 having the flange portion 35 protruding from the outer peripheral portion is provided in the mounting port 46 formed in the support base 41.
And a mounting structure for a hydraulic valve, wherein the flange portion 35 is mounted around the mounting opening 46 of the support base 41 by bolting.
The mounting port 4 is communicated with the mounting port 46 and the hydraulic valve 33 is connected to the mounting port 4 in a direction intersecting the opening direction of the mounting port 46.
6, a bolt insertion hole 49 is formed in the flange 35, and the support table 41 is formed.
A stud bolt 48 inserted into the bolt insertion hole 49 is provided upright around the mounting port 46 in FIG.

In this case, the mounting port 46 is inserted through the insertion port 47.
Since the hydraulic valve 33 can be inserted from a direction intersecting the opening direction of the mounting hole 46, the flange portion 35 can be directly bolted to the support base 41 without forming the mounting port 46 as a large opening, Further, by using the stud bolts 48 erected on the support base 41 as the bolts, the bolts can be quickly positioned by being inserted into the bolt insertion holes 49 of the flange portion 35, and can be easily positioned by fastening the nuts to the stud bolts 48. It becomes possible to attach to.

Therefore, a mounting plate as in the prior art is not necessary, and the number of bolt fastening portions can be reduced, the number of parts can be reduced, the number of assembling steps can be reduced, and the work of detaching the valve 33 for maintenance or the like can be easily performed. I can do it. Also,
According to the present invention, the hydraulic valve 33 having the flange portion 35 protruding from the outer peripheral portion is positioned in the mounting port 46 formed in the support base 41, and the flange section 35 is bolted around the mounting port 46 of the support base 41. A mounting structure of a hydraulic valve adapted to be mounted, wherein the support base 41 communicates with the mounting port 46 and directs the hydraulic valve 33 from the direction intersecting the opening direction of the mounting port 46 to the mounting port 46. The support table 41 is formed by forming an insertion port 47 into which the support table 41 is inserted.
A bolt insertion hole 48 is formed around the mounting port 46 in the above, and a stud bolt 48 inserted into the bolt insertion hole 49 is provided upright on the flange portion 35.

In this case, the same operation and effect as those described above are obtained, but the opening direction of the mounting port 46 is set to the vertical direction.
When a connection portion of a hydraulic pipe is formed on the lower side as the hydraulic valve 33, the stud bolt 48 is detached from the bolt insertion hole 49 and the hydraulic valve 33 is moved downward with the hydraulic pipe connected. It can be easily taken out, which is more advantageous in terms of improvement in maintainability. The support table 41 includes an upper wall 44 on which the mounting port 46 is formed, and a vertical wall 4 extending downward from an end of the upper wall 44.
And the insertion slot 47 is formed in a range from the upper wall 44 to the vertical wall 42.

Thus, the hydraulic valve 33 can be suitably inserted and removed without the vertical wall 42 becoming an obstacle.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. FIGS. 5 and 6 show a backhoe 1 employing a hydraulic valve mounting structure according to the present invention.
The backhoe 1 includes a traveling device 3 having a pair of left and right crawler traveling bodies 2, a revolving body 4 provided on the traveling device 3 so as to be rotatable around a vertical axis X, and a revolving body 4. And a drilling device 5 provided at the front of the vehicle.

An operating unit 6 is disposed on the left front side of the revolving unit 4, and the operating unit 6 includes a driver's seat 7, a control table 8 provided on both left and right sides of the driver's seat 7, and a driver's seat 7. , An operation lever, a pedal 9 and the like disposed in front of the vehicle. The upper part of the driver's seat 7 is covered with a canopy 10. A bonnet 11 is disposed on the right and rear portions of the revolving superstructure 4, and an engine 12, a hydraulic pump 13,
A radiator 14, a hydraulic oil tank 15, a control valve 16, a fuel tank 17, a battery 18, and the like are provided.

The excavator 5 is mounted on a swing bracket 19 provided at the front of the revolving unit 4 so as to be swingable about the vertical axis.
A boom 20 supported to be swingable about the left and right axes,
An arm 21 is supported at the tip of the boom 20 so as to be swingable about the left and right axes, and a bucket 22 is supported at the tip of the arm 21 so as to be swingable about the left and right axes. And these boom 20, arm 21, bucket 22
Each is driven by a boom cylinder 23, an arm cylinder 24, and a bucket cylinder 25, which are hydraulic cylinders.

The crawler traveling body 2 is driven by a traveling motor 26 composed of a hydraulic motor,
Is driven by a turning motor composed of a hydraulic motor provided therein. The control valve 16 distributes and supplies hydraulic oil from the hydraulic pump 13 to each cylinder of the excavator 5, the traveling motor 26, the turning motor, and the like. Driver's seat 7
As shown in FIG. 2, the control tables 8 provided on the left and right sides of the cover body 30 include a cover body 30, an operation lever 31 protruding from an upper portion of the cover body 30, And a pilot valve 33 (a hydraulic valve according to the present invention) supported by the support frame 32. The support frame 32 includes a seat table 37 on which the driver's seat 7 is mounted.
(See FIG. 6) via a bracket or the like.

The pilot valve 33 is operated by the operation lever 31 and controls the control valve 16 with pilot pressure based on the operation. The pilot valve 33 has a valve body 34 having a hydraulic pipe connecting portion 34a provided on the lower end surface.
And a flange portion 35 provided on the upper portion of the valve body 34 and protruding outward from the outer peripheral portion, and a mounting portion 36 provided on the upper side of the flange portion 35 and to which the operation lever 31 is mounted. The flange portion 35
Is attached to the support frame 32 via the The operation lever 3 is provided inside the valve body 34.
A plurality of valve bodies operated by one back and forth or left and right swing are provided.

As shown in FIGS. 1 to 3, the support frame 32 includes a pair of left and right side plates 40 extending in the front-rear direction, and a support table 41 is attached to the front side of the side plates 40. The support base 41 includes a front vertical wall 42 protruding upward from the side plate 40, a rear vertical wall 43 also protruding upward from the side plate 40, and disposed at an interval behind the front vertical wall 42,
An upper wall 44 connects upper ends of the front and rear vertical walls 42 and 43, and the front and rear vertical walls 42 and 43 and the upper wall 44 are integrally formed by bending a plate material into a U-shape.

The support table 41 is provided so as to be inclined so that its upper wall faces slightly obliquely forward and upward. A mounting port 46 for inserting and mounting the pilot valve 33 is formed in the upper wall of the support table 41 so as to penetrate vertically and open. An insertion opening 47 is formed at the left front side of the mounting opening 46 to open the mounting opening 46 to the side (diagonally forward left) by notching the upper wall 44 and the front vertical wall 42. , The pilot valve 33 can be inserted from the side (that is, a direction intersecting the opening direction of the mounting port 46) toward the mounting port 46.

Stud bolts 48 are erected at three places around the mounting opening 46 in the upper wall 44.
It is fixed to. On the other hand, the flange portion 35 of the pilot valve 33 has a bolt insertion hole 49 in which the stud bolt 48 is inserted at a corresponding position. Then, as shown in FIG. 1, the pilot valve 33 is positioned at the mounting port 46 while being inserted obliquely downward from the valve body 34 through the insertion port 47 toward the lower side of the upper wall 44, and is positioned at the mounting port 46. The flange portion 35 is placed on the upper wall 44 by inserting the insertion hole 49 into the stud bolt 48.

Thereafter, the nut 50 can be easily attached to the stat bolt 48 by fastening the nut 50 from above the flange portion 35. After the pilot valve 33 is assembled, the nut 50 can be removed from the stud bolt 48 and the flange portion 35 can be removed from the support base 41 for maintenance or the like, and the hydraulic pipe P is connected to the valve body 34. In this state, it is possible to once pull out the upper side of the flange portion 35 from the mounting port 46 to the insertion port 47 side, then put it under the upper wall 44, and pull it out through the space between the left and right side plates 40. .

Since the insertion opening 47 is notched so as to cut not only the upper wall 44 but also the upper part of the front vertical wall 42 downward, the front vertical wall 42 does not hinder the pilot. The insertion and removal of the valve 33 is facilitated.
Further, since the strength of the support base 41 is reduced by forming the insertion opening 47 as compared with the conventional case, the upper wall 44 is not required.
It is preferable to provide a reinforcing rib 39 (see FIGS. 1 and 2) between the rear left side and the rear vertical wall 43. FIG. 4 shows a second embodiment of the present invention.

In the present embodiment, a plurality of stud bolts 48 are erected on the flange portion 35, and a bolt insertion hole 49 into which the stud bolt 48 is inserted is provided in the upper wall 44 of the support base 41. It is formed around. Then, the flange portion 35 is inserted into the lower side of the upper wall 44 together with the valve body 34 through the insertion opening 47, and the stud bolt 48 is inserted into the insertion hole 49 from below, and the stud is inserted from above the upper wall 44. The nut 50 is fastened to the bolt 48. Also in the present embodiment, the pilot valve 33 can be quickly positioned with respect to the support base 41 simply by inserting the stud bolt 48 into the insertion hole 49,
The nut 50 can be easily attached by fastening.

When the pilot valve 33 is to be removed with the hydraulic pipe P connected for maintenance or the like, the nut 50 is removed from the stud bolt 48 so that the left and right side plates 40 are not inserted through the insertion port 47. The space can be extracted downward, so that the maintainability is further improved. The present invention can be appropriately changed in design without being limited to the above embodiment. For example, the insertion opening 47 may be formed only in the upper wall 44, or may be formed in a range from the upper wall 44 to the rear vertical wall 43. The insertion opening 47 may be formed on the right side of the support base 41.

The support table 41 is not limited to the arrangement in which the opening direction (through direction) of the mounting opening 46 is in the vertical direction, but may be in the left, right, front and rear directions, and the like.

[0024]

As described in detail above, according to the present invention, the hydraulic valve can be easily and quickly mounted, the number of assembling steps and the number of parts can be reduced, and the maintainability can be improved.

[Brief description of the drawings]

FIG. 1 is a front view showing a mounting structure of a pilot valve according to a first embodiment of the present invention.

FIG. 2 is a side view of the same.

FIG. 3 is a plan view of the same.

FIG. 4 is a side view showing a mounting structure of a pilot valve according to a second embodiment of the present invention.

FIG. 5 is a plan view of a backhoe.

FIG. 6 is a side view of the backhoe.

FIG. 7 is a perspective view showing a mounting structure of a pilot valve according to the related art.

[Explanation of symbols]

 33 Pilot Valve 34 Valve Body 35 Flange 36 Mounting Part 41 Support 42 Front Vertical Wall 43 Rear Vertical Wall 44 Top Wall 46 Mounting Port 47 Insertion Port 48 Stud Bolt 49 Bolt Insertion Hole

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Yuji Yamashita 64, Ishizukita-cho, Sakai City, Osaka Prefecture Inside the Kubota Sakai Works (72) Inventor Tokuzo Saida 64, Ishizukitacho, Sakai City, Osaka Prefecture Kubota Sakai Co., Ltd. Inside the factory (72) Inventor Toshiaki Otani 64 Ishizukita-cho, Sakai-shi, Osaka F-term in Kubota Sakai Factory (reference) 2D015 BA04 3H051 BB10 CC14 FF07

Claims (3)

[Claims] 1. A hydraulic valve (33) having a flange portion (35) projecting from an outer peripheral portion thereof is positioned at a mounting port (46) formed in a support base (41), and said flange portion (35) is provided.
Is mounted around the mounting port (46) of the support base (41) by bolt fastening, wherein the support base (41) communicates with the mounting port (46) and An insertion port (47) through which a hydraulic valve (33) can be inserted toward the mounting port (46) from a direction intersecting the opening direction of the mounting port (46) is formed, and the flange portion (3) is formed.
5) A bolt insertion hole (49) is formed in the support base (4).
A mounting structure for a hydraulic valve, wherein a stud bolt (48) inserted into the bolt insertion hole (49) is provided upright around the mounting port (46) in 1). 2. A hydraulic valve (33) having a flange portion (35) projecting from an outer peripheral portion thereof is positioned at a mounting port (46) formed in a support base (41), and said flange portion (35) is provided.
Is mounted around the mounting port (46) of the support base (41) by bolt fastening, wherein the support base (41) communicates with the mounting port (46) and An insertion port (47) through which a hydraulic valve (33) can be inserted toward the mounting port (46) from a direction intersecting the opening direction of the mounting port (46) is formed, and the support base (41) is formed.
Around the mounting port (46) at the bolt insertion hole (4).
9) The mounting structure for a hydraulic valve, wherein a stud bolt (48) inserted into the bolt insertion hole (49) is provided upright on the flange portion (35). 3. The support table (41) is provided with the mounting opening (4).
6) having an upper wall (44) and a vertical wall (42) extending downward from an end of the upper wall (44), and the insertion opening (47) is connected to the upper wall (44). 3 or 4, wherein the wall is formed in a range from the vertical wall to the vertical wall.
The mounting structure of the hydraulic valve according to 1.