JPH1096248A - Mounting structure of selector valve in construction equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the blowing-in of hot air into a driver's cab by penetrating a piping from a selector valve into a through-hole having a diameter smaller than the selector valve installed to a fire wall while closing the through-hole by the selector valve. SOLUTION: A through-hole communicated with a driver s control room 6 from an engine room 7 is bored to a frame-side wall 5a, and a pipe 9c group extended from a selector valve 9 is penetrated. The through-hole is formed in a diameter smaller than the pipe drawing-out surface section of the valve 9 while the valve 9 applies the pipe drawing-out surface section to the through- hole from the engine room 7 side and installs the pipe drawing-out surface section to the wall 5a. Accordingly, the mounting structure can be simplified because the through-hole need not be closed by using an exclusive closing member, and blowing into the driver's cab 6 of hot air from the engine room 7, the elevation of room temperature and the deterioration of work environment can be prevented, and the length of an oil hose 9d can be shortened, and the heating of the pipe 9c group, the oil hose 9d, etc., in the engine room 7 can be obviated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention belongs to the technical field of construction machines such as hydraulic excavators.

[0002]

2. Description of the Related Art In general, in the case of a construction machine such as a hydraulic shovel, there are a plurality of operation patterns of operation levers, and an operator who has learned any one of them operates a machine having another operation pattern. It is not preferable. Therefore, in such a case, a selector valve capable of switching the operation pattern to a corresponding one is attached. In this case, since it is difficult to inadvertently switch the operation pattern of the selector valve, attempts have been made to store the selector valve in an engine room covered with a hood with a locking device.

[0003]

However, as shown in FIG. 7, a selector valve 16 is attached to a firewall 15 that separates an engine room 13 and a driving cockpit 14, and extends from the selector valve 16, as shown in FIG. The oil hose 17 was further penetrated from a through hole 15b provided separately in the firewall 15, and was connected to a control valve arranged on the operation cockpit side. For this reason, the selector valve 16 mounting portion 1 is attached to the firewall 15.
5a and the through hole 15b for an oil hose are not allowed, and the oil hose 17 passes through the through hole 15b with a gap. In addition to impairing the firewall function, hot air in the engine room is blown into the driving cockpit 14 by the blast action of the suction fan 19 (radiator fan) of the engine, and the operator working in the driving cockpit 14 There is a problem that the working environment is deteriorated, and there is also a problem that the pipe drawn from the selector valve 16 is heated in the engine room 13, and there is a problem that the present invention does not solve.

[0004]

SUMMARY OF THE INVENTION The present invention has been made to solve these problems in view of the above-mentioned circumstances, and has an engine room in which an engine is housed. In a construction machine having a compartment openable and closable via a hood with a locking device, the engine compartment is separated from the operation cockpit by disposing a selector valve capable of switching an operation pattern in the engine compartment. A through hole for penetrating a pipe group extending from the selector valve was formed in the firewall with a diameter smaller than that of the selector valve, and a fuel selector valve was attached to the side of the engine room of the firewall so as to close the through hole. Things. With this configuration, the mounting structure of the selector valve can be simplified, and the through-hole for penetrating the oil hose is closed by the selector valve, so that the hot air in the engine room flows to the driving cockpit. The blowing can be prevented by effectively using the selector valve, and the working environment can be prevented from deteriorating.

In this case, the firewall on which the selector valve is mounted may be a frame-side wall provided on the body frame side on which the engine is mounted. In this case, the control valve mounted on the body frame There is an advantage that the distance to the distance can be shortened.

[0006]

FIG. 1 shows an embodiment of the present invention.
This will be described with reference to FIG. In the drawings, reference numeral 1 denotes a small hydraulic shovel, which is one of construction machines. The hydraulic shovel 1 includes a crawler-type lower traveling body 2 and an upper rotating body 4 equipped with a working device 3 at a front end thereof. Mounted freely.

[0007] The body frame 5 constituting the upper swing body 4
A driver's cockpit 6 is provided on the front side of the vehicle, and an engine room 7 is provided on the rear side. The two rooms 6 and 7 are separated by a firewall. A frame-side wall 5a and a wall main body 8 that partitions a cabin-type operation cockpit 6 and an engine room 7 above the frame-side wall 5a. In the present embodiment, the frame side wall 5a will be described later. The present invention is implemented on the wall 5a. Here, the engine room 7 is configured to be openable and closable by an engine hood 7b having a locking device 7a.

The selector valve 9 has a substantially cylindrical shape, and is provided on one side thereof with a lever 9a for appropriately selecting and setting an operation pattern. On the other hand, on the other side of the selector valve 9 (corresponding to the pipe drawing surface of the present invention), a bolt hole 9b is engraved on the peripheral portion, and
A plurality (16 in the present embodiment) of pipes (corresponding to the pipes of the present invention) 9c are extended and drawn out, and an oil hose 9d is connected to the end of each pipe 9c. The oil hose 9d is set to be connected to hydraulic members such as a control valve 10 and a joystick lever 11 mounted on the front of the body frame 5.

The frame side wall 5a communicates from the engine room 7 side to the driving cockpit 6 side, and the pipe 9
A through hole 5b for penetrating the group c is opened. The diameter of the through hole 5b is smaller than the diameter of the selector valve 9. Further, the through hole 5 of the frame side wall 5a
b At the peripheral portion, mounting holes 5 corresponding to the bolt holes 9b are provided.
c is formed. Then, the other side surface of the selector valve 9 is covered with the frame side wall 5 so as to close the through hole 5b.
a, which is secured to the side of the engine room by bolts 12 from the driving cockpit side.

In the embodiment of the present invention configured as described above, the selector valve 9 is disposed in the engine room 7 covered with the lockable bonnet 7b, so that inadvertent valve switching is prevented. A through hole 5b through which a pipe 9c drawn from the selector valve 9 passes.
Has a smaller diameter than the pipe drawing surface of the selector valve 9, and the selector valve 9 is fixed to the frame side wall 5a such that the drawing surface of the selector valve 9 is applied to the through hole 5b from the engine room 7 side. Is done. As a result, the through-hole 5b for penetrating the pipe 9c is closed by attaching the selector valve 9, and it is not necessary to close the through-hole 5b using a dedicated closing member.
As a result, the mounting structure can be simplified, and
The selector valve 9 can be effectively used to prevent the working environment from deteriorating, such as the hot air from the engine room 7 being blown into the driving cockpit 6 and the room temperature of the driving cockpit 6 rising.

Moreover, in this case, the selector valve 9
Is mounted not on the wall body 8 side but on the body frame side wall 5a, so that there is no need for reinforcement for securing the required mounting strength as in the case of mounting on the wall body 8 side, and the front of the wall body frame 5 The distance from the control valve 10 mounted on the section can be shortened, and the oil hose can be shortened.

Furthermore, since the pipes (pipe and oil hose) from the selector valve 9 do not pass through the engine room 7, it is possible to prevent the pipes from being heated in the engine room 7.

Incidentally, the present invention is not limited to the above-described embodiment. If the selector valve has a flange drawing-out surface portion larger than the selector valve main body, the through-hole is formed by the flange-like drawing. It can be implemented as smaller than the outer shape of the face. In addition, the through hole may be formed not in the frame-side wall but in the upper wall body.

[Brief description of the drawings]

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

FIG. 2 is a plan view of the hydraulic excavator.

FIG. 3 is a rear view of the excavator.

FIG. 4 is a plan view showing a state where a selector valve is mounted.

FIG. 5A is a side view showing a selector valve mounted state, and FIG. 5B is a cross-sectional side view of the main part.

FIG. 6 is a view taken along the line NN of FIG. 5;

FIG. 7A is a schematic plan view showing a conventional example, and FIG. 7B is a schematic side view showing a conventional example.

[Explanation of symbols]

 Reference Signs List 5 body frame 5a frame side wall 5b through hole 5c mounting hole 6 driving cockpit 7 engine room 8 wall body 9 selector valve 9a lever 9b bolt hole 9c piping 9d oil hose 10 control valve 11 joystick lever

Claims (2)

[Claims] 1. A construction machine in which an engine room for storing an engine is formed, and the engine room is configured to be openable and closable via a hood with a locking device, wherein an operation pattern can be switched to the engine room. In arranging the selector valve, the selector valve is configured such that a pipe drawing surface portion for drawing a plurality of pipes is formed, and the plurality of pipes are connected to a firewall partitioning the engine room and the driving cockpit. Construction in which a through hole for penetration is set smaller than the outer shape of the pipe drawing surface, and a selector valve is attached to the firewall so that the pipe drawing surface is applied to the through hole from the engine room side. Mounting structure of selector valve in machine. 2. The structure for mounting a selector valve in a construction machine according to claim 1, wherein the firewall on which the selector valve is mounted is a frame-side wall provided on a body frame side on which an engine is mounted.