JPH053566Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial application field The present invention relates to the structure of a driver's cab for construction machinery.

BACKGROUND ART FIG. 4 is a side view of a hydraulic excavator, in which 1 is an upper rotating body, 2 is a lower traveling body, and 3' is a driver's cab attached to the upper rotating body 1. FIG. 5 is a perspective view of the cab body 4' of the driver's cab 3'. 6th
The figure is a side view of the vicinity of the conventional technology operator's cab 3'.
In the figure, 5' is the cab floor plate, 6' is the buffer support,
7' is the bolt, and 8 is the driver's seat. Therefore, the cab floor plate 5' is attached to the upper revolving body 1 via a plurality of buffer supports 6', and the cab body 4' is fixed to the cab floor plate 5' with a plurality of bolts 7'. . The driver's seat 8 is attached to the upper surface of the cab floor plate 5', and the driver sits on the driver's seat 8 to operate the construction machine. Figure 7 is A in Figure 6.
In this detailed view, 9' is a cushion member constituting the buffer support 6', 10 is a cover, and 11 is a bolt and a nut. Therefore, the cab floor plate 5' can be buffered against the upper revolving structure 1, but the cab body 4' is fixed to the cab floor plate 5' with bolts 7'.

Problems to be Solved by the Invention In general, a construction machine operator's cab is supported by buffer supports at an arbitrary number of positions, such as four or six positions, on the upper revolving body. In the prior art operator's cab shown in FIG. 6, the cab floor plate can be buffered against the upper revolving structure at the portion of the buffer support. However, the cushion member constituting the buffer support is made of a material that has a certain degree of hardness. The reason for this is that if a soft material with high elasticity is used for the cushion member, the driver's seat attached to the cab floor plate will shake and vibrate greatly during excavation work or when the construction machine is running on uneven ground. The driver may feel unwell and may experience symptoms of car sickness. Therefore, in the driver's cab of the prior art, a cushion member of the cushioning support has a relatively low elasticity and is fairly hard to be tolerated by the driver. For this reason, the vibration-proofing function of the cushion member is small, and shocks, jolts, and vibrations caused by construction machinery during excavation work or running on uneven ground are directly transmitted to the cab body, which is integrally fixed to the cab floorboard. There was a risk of cracks occurring in the main body. Therefore, the cab body of the prior art is required to be rigid enough to withstand the impact, rocking, and vibration of construction machinery, and the wall thickness and frame width of each component frame are large, and the weight is also large. Production costs were high.

Means for Solving the Problems The means of this invention taken to solve the above problems are as follows: (a) Buffer supports are arranged at multiple locations on the upper revolving body at each of the mounting positions of the operator's cab; In a construction machinery operator's cab installed via a buffer support, the lower part of the cab body and the cab floor plate are connected at multiple locations through buffer bodies, so that the cab body can be buffered against the cab floor plate. In addition, a plurality of Hakiba floor plates were attached to the upper revolving body via buffer supports.

Function A: Since the lower part of the cab body and the cab floor plate are connected at multiple points via shock absorbers, shocks, swings, vibrations, etc. transmitted from the cab floor plate side are prevented from being transmitted by the cushion members of the shock absorbers. eased.

(b) The cab, which is constructed by connecting the cab body and the cab floor plate via a buffer, is mounted on the upper revolving structure via buffer supports placed at multiple locations, so that the transmission from the upper revolving structure is The transmission of shock, rocking, vibration, etc. is alleviated by the cushion member of the buffer support.

Embodiments Hereinafter, embodiments of the present invention will be described in detail based on the drawings. FIG. 1 is a side view of the floating cab device of the present invention. In the figure, 3 is the driver's cab, 4 is the cab body, 5 is the cab floor plate, and 6 is the buffer installed between the cab floor plate 5 and the upper revolving structure 1. support,
8 is the driver's seat. 2 and 3 are detailed views of section B in FIG. 1. Therefore, a cushion member 13a with a plate is attached to the buffer body provided between the lower part of the cab body 4 and the cab floor plate 5, in the case of FIG. 2, the cushion member 13a with a plate is attached to the buffer body 12a, and in the case of FIG. A cushion member 13b is used. Note that the bolts 7a and 7b are both shock absorbers 1.
2a, 12b are mounting bolts.

Next, the structure and function of the float cab device of the present invention will be described with reference to FIGS. 1 to 3. Driver's cab 3
The cab body 4 and the cab floor plate 5 constituting the cab body 4 are connected via a plurality of buffer bodies 12a and 12b arranged at a plurality of locations on the lower part of the cab body 4. Therefore, the cushion members 13a and 13b of the shock absorbers 12a and 12b are made of an elastic material that has the effect of sufficiently alleviating and preventing shocks, swings, vibrations, etc. transmitted from the cab floor plate 5 side. The elastic material is, for example, a non-metallic soft elastic member or a metal spring. On the other hand, buffer supports 6 are arranged at a plurality of locations at the mounting positions of the cab floor plate 5 on the upper revolving structure 1, and the cab floor plate 5 is attached to the upper revolving structure 1 via the plurality of buffer supports 6. There is. Therefore, the cushion member 9 of the buffer support 6 prevents the impact, rocking, vibration, etc. transmitted from the upper revolving structure 1 from being mitigated, and allows the driver to sit in the driver's seat 8 and perform comfortable driving operations. Elastic members such as nonmetals, metals, or combinations of metals and nonmetals are used.

Therefore, the cab body 4 of the operator's cab 3 receives shocks, vibrations, or vibrations generated from the upper rotating body 1 and the lower traveling body 2 of the construction machine. body 12a, 12
The signal is transmitted through the two-stage shock absorbing member shown in b.

Effects of the invention As mentioned above, the float cab device of the invention has the following effects:
The lower part of the cab body and the cab floor plate are connected at multiple points via buffer bodies, respectively, so that the cab body can be buffered against the cab floor plate, and the cab floor plate is connected to the upper revolving body in multiple places via buffer supports. Installed and configured.

In the prior art, the cab floor plate is able to buffer against the upper revolving body at the buffer support portion, but
The cab body and driver's seat are fixed to the cab floorboard. Therefore, when a highly elastic soft member is used as the cushion member of the buffer support, the cushion on the cab floorboard, that is, below the driver's seat, is too soft, causing the driver to feel uncomfortable along with the shaking and vibration of the construction machine. For this reason, it has been necessary to use a hard cushion member with low elasticity as the cushion member of the buffer support. Therefore, the vibration-proofing function of the cushion member was low, and the impact, vibration, vibration, etc. of the construction machine was directly transmitted to the cab floor plate and the cab body, and there was a risk of cracks occurring in the cab body. Therefore, the cab body of the prior art was required to be rigid enough to withstand the impact, rocking, and vibration of construction machinery, and its manufacturing cost was high.

However, in the float cab device of the present invention, cushion members with vibration isolation function and high elasticity are arranged at multiple locations at the bottom of the cab body, and are attached to the cab floor plate via the cushion members, so that the cab body is placed on the upper revolving structure side. Shocks and vibrations transmitted from
Flexibly reduces and prevents vibrations. For this purpose, the frame member of the cab body can maintain its strength with a member that is less rigid than those of the prior art, so it is possible to maintain strength by using a member with lower rigidity than those of the conventional technology. Light weight can be achieved by using synthetic resin, plastic, hard urethane, etc.
On the other hand, the material of the cushion member of the buffer support provided between the upper revolving structure and the cab floor plate is designed to provide the optimal vibration isolation and cushioning properties desired by the driver, with little regard to the strength of the cab body. A cushion member can be used. Therefore, in the float cab device of the present invention, it is possible to reduce the rigidity of the cab body and the cab floor plate, and to expand the visibility by increasing the transparent (glass) part of the cab body, and to reduce the degree of cushioning in the driver's seat area. It is possible to set the seat optimally for the driver, ensure a comfortable seated driving feeling, a wider field of view, and reduce the production cost of the driver's cab.

[Brief explanation of the drawing]

Figure 1 is a side view of the float cab device of the present invention.
Figures 2 and 3 are detailed views of section B in Figure 1, and Figure 4.
5 is a perspective view of the cab body, FIG. 6 is a side view of the vicinity of the conventional cab, and FIG. 7 is a detailed view of section A in FIG. 6. 3, 3'... Driver's cab, 4, 4'... Cab body,
5, 5'... Cab floor plate, 6, 6'... Buffer support, 9, 9'... Cushion member, 12a, 12
b...Buffer body, 13a...Cushion member with plate, 13b...Cushion member.

Claims (1)

[Scope of utility model registration request] Buffer supports are placed at multiple locations on the upper revolving body at multiple locations for installing the driver's cab, and in the driver's cab for construction machinery, which is attached via the multiple buffer supports, the lower part of the cab body and the cab floor plate are installed at multiple locations. A construction machine characterized in that the cab bodies are connected to each other via a buffer body so that the cab body can be buffered against the cab floor plate, and a plurality of cab floor plates are attached to an upper revolving body via buffer supports. Float cab device in the operator's cab.