JPH0731963U - Mounting structure of hydraulically operated valve - Google Patents

Abstract

(57) [Summary] [Purpose] To reduce the internal resistance of the pipe of the spool-type hydraulically operated valve of a hydraulic excavator equipped with a hydraulic pump and hydraulic actuator in the front-rear direction to reduce the space. [Structure] The spool 21 of the hydraulic control valve 20 is arranged vertically, and the hydraulic supply port 22 is formed in the front-rear direction.
It is fastened to the frame 26 via the bracket 25. The pipes 23 and 24 that connect the hydraulic operation valve 20 and the hydraulic pumps or hydraulic actuators arranged in the front-rear direction of the vehicle can be made linear in the vicinity of the hydraulic supply port 22, and have a low internal resistance and a small space. Can be small.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a mounting structure for a hydraulic operation valve of a hydraulic excavator.

[0002]

[Prior art]

 FIG. 1 is a side view of a normal hydraulic excavator, in which an upper revolving structure 2 is mounted on a lower traveling structure 1 so as to be freely rotatable. A boom 4 for a working machine and a boom cylinder 5 for driving the boom 4 are mounted in front of the frame 3 of the upper swing body 2. An arm 6 is attached to the tip of the boom 4 and is driven by an arm cylinder 7. A bucket 8 is attached to the tip of the arm 6 and is driven by a bucket cylinder 9. A center swivel joint 10 is mounted at the center of swing of the upper swing body 2, and a swing motor 11 is mounted behind the center swivel joint 10. A hydraulic pump 12 driven by an engine is mounted on the rear portion of the upper swing body 2, and a spool-type hydraulic operating valve 13 is mounted between the swing motor 11 and the hydraulic pump 12. The hydraulic operation valve 13, the hydraulic pump 12, and the hydraulic actuators such as the cylinders are connected by hydraulic piping.

FIG. 3 is a perspective view showing a first example of a conventional hydraulically operated valve mounting structure, in which the arrow indicates the front-rear direction of the vehicle. That is, in the hydraulic operation valve 30, the spool 31 is arranged in the horizontal direction, and the bracket 35 is installed in the frame 3 of the upper revolving structure 2 shown in FIG. It is installed. The hydraulic pipes 33 and 34 are connected to a hydraulic pump or a hydraulic actuator.

FIG. 4 is a perspective view showing a second example of a conventional mounting structure for a hydraulically operated valve, in which the arrow indicates the front-back direction of the vehicle. That is, the hydraulic operation valve 40 has the spool 41 arranged in the vertical direction, and is mounted on the frame 3 of the upper swing body 2 shown in FIG. 1 by the bracket 45 so that the hydraulic pressure supply port 42 is in the left-right direction of the vehicle. There is. The hydraulic pipes 43 and 44 are connected to a hydraulic pump or a hydraulic actuator.

[0005]

[Problems to be solved by the device]

 However, according to the above configuration, since the hydraulic pipes are arranged in the left-right direction or the vertical direction of the vehicle, the hydraulic pipes that connect the hydraulic actuator in the front of the vehicle and the hydraulic pump in the rear to the hydraulic operation valve are As shown in the hydraulic pipes 33 and 34 of FIG. 3 and the hydraulic pipes 43 and 44 of FIG. 4, it is necessary to sharply bend the pipes near the hydraulic pressure supply ports 32 and 42 of the hydraulically operated valves 30 and 40. Therefore, there is a problem that the resistance in the pipe becomes large and the field becomes large.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a mounting structure for a hydraulically operated valve having a small pipe resistance and a small field area.

[0007]

[Means for Solving the Problems]

 In order to achieve the above object, in the hydraulic valve mounting structure according to the present invention, a hydraulic excavator equipped with a spool-type hydraulic valve for controlling the operation of a hydraulic actuator for driving a front working machine is provided. The operation valve is characterized in that the spool is arranged in the vertical direction and the hydraulic pressure supply port is formed in the front-rear direction of the vehicle.

[0008]

[Action]

 According to the above configuration, since the spool of the hydraulically operated valve is arranged in the vertical direction and the hydraulic pressure supply port is formed in the longitudinal direction of the vehicle, the hydraulic pump arranged in the longitudinal direction of the vehicle, or the hydraulic actuator and the hydraulically operated valve are arranged. The pipe connecting to and can be made linear in the vicinity of the hydraulic pressure supply port of the hydraulically operated valve.

[0009]

【Example】

 An embodiment of a mounting structure for a hydraulically operated valve according to the present invention will be described below with reference to the drawings. FIG. 2 is a perspective view showing the mounting structure of the hydraulically operated valve, and the arrows show the front-back direction of the vehicle. That is, with the spool 21 of the hydraulic control valve 20 arranged vertically and the hydraulic supply port 22 formed in the front-rear direction of the vehicle, the horizontal beam 26 of the frame 3 of the upper swing body 2 shown in FIG. Is fastened to. Therefore, the pipes 23 and 24 connecting the hydraulic operation valve 20 and the hydraulic pumps and hydraulic actuators arranged in front of and behind the vehicle are linear near the hydraulic supply port 22, and the internal resistance is small.

[0010]

[Effect of device]

 As described above, according to the present invention, the spool type hydraulic operation valve of the hydraulic excavator equipped with the hydraulic pump or the hydraulic actuator in the longitudinal direction of the vehicle has the spool arranged vertically and the hydraulic supply port is formed in the longitudinal direction of the vehicle. Therefore, the piping connecting the hydraulic pump or the hydraulic actuator to the hydraulically operated valve can be made straight in the vicinity of the hydraulic pressure supply port of the hydraulically operated valve, and the resistance in the pipe is small and the space is small. Further, since the spool is in the vertical direction, there is little difference in clearance due to the weight of the spool, and a structure for mounting the hydraulically operated valve in which the spool can be operated easily can be obtained.

[Brief description of drawings]

FIG. 1 is a side view of a hydraulic excavator.

FIG. 2 is a perspective view showing a mounting structure of the hydraulically operated valve of the present invention.

FIG. 3 is a perspective view showing a first example of a conventional mounting structure for a hydraulically operated valve.

FIG. 4 is a perspective view showing a second example of a conventional mounting structure for a hydraulically operated valve.

[Explanation of symbols]

 20 Hydraulic Control Valve 21 Spool 22 Hydraulic Supply Port 23, 24 Piping

Claims (1)

[Scope of utility model registration request] 1. A hydraulic excavator including a spool-type hydraulically operated valve for controlling the operation of a hydraulic actuator for driving a front working machine or the like, wherein the hydraulically operated valve has a spool arranged vertically and a hydraulic pressure supply port. A mounting structure for a hydraulically operated valve, characterized in that the valve is formed in the front-back direction of the vehicle.