JPS6141802Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a turning operation device for a working machine such as a vertical hole hydraulic excavator, and in particular, an extension arm or a multi-stage telescoping device that extends and retracts from a boom attached to the front of a vertical hole hydraulic excavator. This item relates to a swing operation device for positioning the swing lock of a shaft hydraulic excavator, etc., in which the driver's cab (chamber) of a pit hydraulic excavator, etc. equipped with a deep-digging attachment such as an arm extends out to a position where the excavation point can be seen directly. It is.

Conventionally, in this type of vertical hole hydraulic excavator, the tip of the driver's cab (base) is almost on the same end surface as the lower traveling body (vehicle body), and the excavation point cannot be seen directly from the operator's cab, unlike in general excavators. A system has already been proposed in which the chamber extends outside the lower traveling body so that the inside of the excavation hole can be seen sufficiently from the driver's cab.

However, when the driver's cab is extended, the distance between the driver's cab and the position of the swing lock on the upper rotating body increases, and when performing positioning operations for the swing lock, the pin hole provided in the lower traveling body and the pin on the upper rotating body side need to be aligned. If they are not on the same axis (do not match), the driver must return to the driver's cab each time and perform fine rotation operations using the rotation control lever to align the positions. There was a problem in that the user had to go back and forth between the two positions to position the swing lock.

This idea was made in view of the above,
Separately from the swing control lever provided in the cab (cabin), an auxiliary swing control lever is provided near the swing lock position, and the driver moves back and forth between the cab (cabin) and the swing lock position many times when operating the swing lock. This makes it possible to perform the positioning operation of the swing lock without any trouble.

The following will explain the embodiments shown in the drawings.

Reference numeral 1 denotes an upper revolving body, and 2 denotes a lower traveling body, on which the upper revolving body 1 is rotatably mounted.

Reference numeral 3 denotes a driver's cab (chamber) extending in front of the upper revolving body 1, and the driver's cab includes a seat 4, a swing operation lever 5, and a travel/boom/arm operation lever 6.
6′, 6″ are arranged, and these levers 5,
6, 6', 6'' are connected to the control valve 8 via connecting rods 7, 7', . . . , respectively.

Reference numeral 9 denotes a swing lock handle attached to the upper revolving body 1, which is engaged and disengaged by a locking device 10 constituted by, for example, a pin provided on the upper revolving body 1 and a pin hole installed in the lower rotating body 2. Locks and unlocks the rotation of the upper revolving body 1.

Reference numeral 11 denotes an auxiliary swing operation lever disposed in the middle of the connecting rod 7 connecting the swing operation lever 5 and the control valve 8, close to the swing lock handle 9, and is used to perform the same swing operation as the swing operation lever 5. be.

Note that this auxiliary turning operation lever 11 is connected to the connecting rod 7.
By making it removable, or engaging and disengaging with a clutch, it is used only when necessary and prevents erroneous operation at other times.

This idea has the above-mentioned configuration, and is suitable for normal turning and
Traveling and operation of the boom and arm etc. can be done by sitting on the overhanging driver's cab (chamber) 3 in exactly the same way as in the conventional device. When performing the operation, the auxiliary swing operating lever 11 and the connecting rod 7 are connected, and the position of the swing lock pin and the pin hole is adjusted as in the conventional method by connecting the auxiliary swing operation lever 11 and the connecting rod 7, and performing the swing lock operation with the other hand while performing a small swing operation with the lever 11. It is a hassle for the driver to rely on his intuition and to perform fine turning operations and back and forth between the driver's cab (chamber) 3 and the turning lock handle 9 many times to check whether the pin positions are aligned. Freed from inefficient operations.

As described above, according to the present invention, positioning for the turning lock operation can be performed easily and in a short time, and the driver's fatigue can be reduced.

[Brief description of the drawings]

FIG. 1 is a plan view showing an embodiment of the present invention, and FIG. 2 is a front view thereof. 1... Upper rotating body, 2... Lower traveling body, 3...
Driver's cab, 5... Swivel operation lever, 8... Control valve, 9... Swivel lock handle, 11...
...Auxiliary rotation control lever.

Claims (1)

[Scope of utility model registration request] A turning operation installed in the driver's cab (room) in a working machine such as a hydraulic excavator, which is equipped with an upper rotating body and a lower traveling body, and the upper rotating body is appropriately fixed to the lower traveling body by a locking device. A swing operation device characterized in that an auxiliary swing operation lever connected to the same control valve as the lever is provided close to a swing lock handle.