JPH0534283Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a bumper strip attachment device for a power shovel.

[Conventional technology]

As shown in FIG. 6, horizontal angle members C are welded to both side walls of the lower end of the swivel base of a conventional power shovel, and the angle members function as bumpers when the swivel base collides with a foreign object while rotating. is commonly done.

[Problem that the invention attempts to solve]

When transporting a power shovel on the road, it is mounted on a transport vehicle such as a truck or trailer depending on its own weight, but the width of trucks is restricted to 2.5 m or less, and the width of trailers, etc. is restricted to 3 m or less. In contrast, the width of the driver's cab is 0.9 to improve comfort.
It tends to be ~1 m or more. For this reason, even large power shovels transported on trailers,
If the boom is positioned on a vertical plane in the longitudinal direction that includes the rotation axis of the swivel base, the angle member C may protrude to the side beyond the vehicle width limit. As shown in the figure, the boom 6 is shifted to the side opposite to the operator's cab 7 with respect to the longitudinal vertical plane (0-0) including the rotation axis of the swivel base 1, so as not to impair the lateral stability during digging. However, as shown in FIG. 7, the angle member C may protrude to the side of the truck 8 beyond the vehicle width limit.

[Means for solving problems]

The present invention deals with this problem, and when installing bumper strips on both sides of the lower end of the swivel base of a power shovel, the upper and lower horizontal guide rails 2,
3 is fixed so as to form a groove between both horizontal guide rails, and the open end of the bumper strip 4 having a V-shaped or curved cross section close to this is slid in the longitudinal direction. An arm 13 fixed to the front end of the bumper strip is attached to a bracket movably fitted and fixed to the front wall of the lower end of the swivel table in parallel with the sliding direction of the bumper strip.
The bumper strip is characterized in that it is provided with a fastening means for detachably connecting the tips of the bumper strips with pins 16.

[Effect]

According to the above configuration, the sliding direction of the bumper strip by the upper and lower horizontal guide rails attached to the side wall of the lower end of the swivel table and the bracket protruding and fixed to the front wall of the lower end of the swivel table are parallel to each other. When the power shovel is transported on the road, if the pin 16 is removed from the bracket or the arm of the bumper strip, the bumper strip can be pulled forward from the dovetail groove between the upper and lower horizontal guide rails, and the width of the power shovel can be adjusted to fit the width of the transport vehicle. When digging with a power shovel, insert the open end of the bumper strip from the front end into the groove between the upper and lower horizontal guide rails, and the arm of the front end of the bumper strip can be held within the width. It can be fixed to the bracket of the swivel base with a pin 16.

〔Example〕

1 to 4, upper and lower guide rails 2 and 3 forming dovetail grooves are bent and formed on the upper and lower sides of a band plate portion 5, respectively, and the band plate portions are attached to the lower end of the side wall of the bottom frame 1a of the swivel base 1. An embodiment of the present invention is shown welded to the
A boom 6 is attached to a swivel base 1 rotatably attached to crawlers 9 on both sides via a turntable 10.
The base end of the boom cylinder 11 is pivoted so that it can be raised and lowered freely, and an arm cylinder 12 is attached to the tip of the boom.
As in the prior art, a bucket is rotatably attached to the tip of an arm (not shown) which is rotatably pivoted in a vertical plane by a bucket cylinder.

If there is a possibility that the angle members C on both sides protrude laterally than the vehicle width of the transport vehicle 8 as shown in Fig. 7, the upper and lower horizontal guide rails 2 and 3 should be attached to both side walls of the bottom frame 1a, respectively. However, the width of the right half where the driver's cab 7 is not attached with respect to the longitudinal vertical plane (0-0) including the turning axis is the width of the left half of the driver's cab attached side. For large power shovels that are smaller than the width, the present invention is applied only to the lower end side wall of the bottom frame 1a on the driver's cab installation side, and the angle material C is welded to the lower end side wall of the bottom frame on the opposite side. be able to.

The bumper strip 4 having a V-shaped curved cross section has a short arm 13 welded at its base end to the apex of its front end.
The tip of the bracket 3 is fixed by a removable pin 16 between upper and lower brackets 14 and 15, which are protruded and fixed to the front wall of the bottom frame 1a.

Therefore, if a large impact force P is applied by a foreign object to the apex of the bumper strip 4 fitted in the dovetail groove between the upper and lower horizontal guide rails 2 and 3, the upper and lower bumper strips 4 will open due to the impact force. The expansion component force Pa at the end is received by the upper and lower guide rails 2 and 3, respectively, and the pressing component force Pb acting on the strip portion 5 is received by the side wall (channel steel) of the bottom frame 1a. Therefore, the impact is buffered by the elastic deflection of the upper and lower guide rails 2 and 3 and the deformation of the bumper strip 4 due to the expansion force.

The case where the cross section of the bumper strip 4 is a V-shaped curved section has been described above, but the bumper strip 4 has a fifth section.
As shown in the figure, it is possible to have a curved cross section similar to a V-shape, and in this case, the upper and lower guide rails 2 and 3
Although the amount of bumper strip protrusion E from the bumper strip is reduced compared to the case shown in FIG. 4, the impact absorption function of the bumper strip curved in an arc is increased. In FIG. 5, members given the same reference numerals as those in FIG. 4 indicate corresponding members.

[Effect of idea]

According to the present invention, the upper and lower horizontal guide rails 2, 3
By making the power shovel protrude by a small amount D from the side wall of the lower end of the swivel table, it is possible to eliminate the risk of the bumper strip of the power shovel protruding outside the vehicle width of the transport vehicle during road transport and causing a traffic accident. The width can be increased, which improves the driver's comfort, and the crawler of the power shovel does not interfere with the insertion and removal of the pin of the bumper strip fastening means attached to the front wall of the lower end of the swivel table, making it easier to turn. The bumper strips can be easily attached and detached from the outside of the swivel table, and there is no risk that workers will have to go through the trouble of attaching and detaching the bumper strips to the power shovel before or after transporting the power shovel on the road. be.

[Brief explanation of the drawing]

Fig. 1 is a side view of a power shovel equipped with the device of the present invention, Fig. 2 is a detailed view of section A in Fig. 1, Fig. 3 is a front view thereof, and Fig. 4 is a sectional view taken along line B-B in Fig. 2. FIG. 5 is a sectional view corresponding to FIG. 4 of another embodiment, and FIGS. 6 and 7 are rear views of a conventional power shovel and a rear view showing the state in which it is mounted on a truck, respectively. 6...Boom, 7...Driver's cab, 8...Truck, 9...Crawler, 10...Turntable,
11...Boom cylinder, 13...Arm, 14,1
5...bracket, 16...pin.

Claims (1)

[Scope of utility model registration request] When installing bumper strips on both side walls of the lower end of the swivel base of a power shovel, upper and lower horizontal guide rails 2 and 3 are installed at least on the side wall of the lower end of the swivel base 1 on the driver's cab installation side between the two horizontal guide rails. The bumper strip 4 is fixed so as to form a groove, and the open end of a bumper strip 4 having a V-shaped or curved cross section close to this is fitted into the groove so as to be slidable in the longitudinal direction. A bumper strip fastening means is provided on a bracket protruding and fixed to the front wall of the lower end of the swivel table parallel to the sliding direction, for detachably connecting the tip of an arm 13 fixed to the front end of the bumper strip with a pin 16. A power shovel bumper strip mounting device featuring: