JPS58145552A - Outrigger device of wheeled work machine - Google Patents

Abstract

PURPOSE:To automatically change an attitude of a jack cylinder to a titled storage attitude and vertical attitude, by meshing movement between a rack and pinion. CONSTITUTION:At use of an outrigger, under a condition where an extension beam 3 is overhung to the outside of a machine body, a jack cylinder 5 is extended in a vertical attitude to ground a float 6 and lift the machine body. At storage, under a condition where the cylinder 5 is contracted to separate a protrusive part 55 from an engagement hollowed part 32, the beam 3 is retracted in to a fixed box 2 and housed. Here immediately before the beam 3 is completely housed in the box 2, a pinion 54 in the upper end of the cylinder 5 is meshed to a rack 21 in the box 2, and the cylinder 5 can be automatically swung to displace from a vertical attitude to a titled storage attitude by meshing movement between the rack 21 and the pinion 54 with a stroke from the position to that the beam 3 is housed.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an outrigger device installed in a wheeled working machine such as a truck crane, rack lane crane, or wheel shovel.

As shown in FIGS. 6 to 8, this type of outrigger device has two sets on the left and right sides of the traveling body A, and the overall H
An overhanging beam C is extended to a fixed box B that is installed in a letter-shaped arrangement and fixed to the traveling body A, and a storage cylinder wLk is installed.
A retractable jack cylinder E having a float D at the lower end is fixed in a vertical position at the tip of the extended beam C.

However, this type of conventional outrigger device has the following problems. That is, this type of wheel-type working machine is subject to various restrictions on vehicle body structure modification because it runs on public roads. The height of the underside of the aircraft from the ground is C or less,
(referred to as aircraft height) is one of them. Therefore, the jack cylinder E of the outrigger device requires an extension stroke that is the above-mentioned height of the aircraft plus a stroke for lifting the aircraft off the ground. For this reason, the overall length of the jack cylinder E inevitably becomes long, and the amount of upward protrusion of the machine body increases accordingly. In this way, the jack cylinder protrudes long above the machine body, so during so-called close work such as piling work or loading work with a truck close to the machine body,
This jack cylinder got in the way and made work extremely inconvenient. This was the first problem.

Further, in order to improve the stability of supporting the fuselage, it is desirable that the overhanging beam C extends as long as possible to the outside of the fuselage.

For this reason, when the overhang beam is retracted, the jack cylinder E
is designed so that it fits completely within the legal aircraft width, but in this case, the outer half of the float D attached to the lower end of the cylinder E will protrude from within the aircraft width.

Therefore, conventionally, the float D was removed one by one when driving on public roads, and this work of attaching and detaching the float was extremely troublesome. Furthermore, due to the necessity of attaching and detaching the float, the flow 1-D has to be made small in order to keep the weight of the float small, which is disadvantageous in terms of the stability of supporting the aircraft body.

In view of the above points, the present invention has been developed to make it possible to reduce the amount of upward protrusion of the jet cylinder while adhering to legal restrictions, and to keep the float within the width of the machine body in the retracted state. The purpose is to obtain a mechanical outrigger device.

The characteristics of the present invention are basically that a jack cylinder is pivotally attached to the tip of an overhang beam so that it can swing in the left and right directions using the upper part as a fulcrum, and the cylinder is pulled toward the overhang beam side and tilted. Based on this basic configuration, the rack and pinion automatically change the posture of the above-mentioned jack cylinder from the tilted storage position to the vertical position and vice versa. The feature of the specific configuration is that it is configured so that it can be executed.

Embodiments of the present invention will be described below with reference to FIGS. 1 to 5.

1 is a traveling body frame, 2 is a fixed box fixed to the frame 1, 3 is an overhanging beam that overhangs this fixed box 2 and is fitted in a retractable manner, 4 is an overhanging cylinder, and 5 is a tip of the overhanging beam 3. Installed jack cylinder,
6 is a float attached to the lower end of the jack cylinder 5. The overhanging cylinder 4 has a rod end attached to the inner surface of the distal end of the overhanging beam, and a cylinder bottom attached to the inner surface of the proximal end of the fixed box 2. The extending and contracting operation of the overhanging cylinder 4 causes the overhanging beam 3 to be attached to the fixed box 2. It can be extended and retracted.

In the jacket cylinder 5, the cylinder tube 51 is on the lower side,
The rod 52 is arranged at the tip of the overhang beam 3 in the opposite position to the conventional jack cylinder with the upper side, and the rod end is pivotally connected to the overhang beam 3 via a horizontal pin 53 along the longitudinal direction of the fuselage. ing.

In this way, the cylinder 5 is attached to the tip of the overhanging beam so that it can swing in the left-right direction of the aircraft (0 width direction) using the upper part as a fulcrum. From the posture, as shown in FIG. 1, it is constructed so that it can be pulled and rotated toward the overhanging beam 3 using the upper part as a fulcrum and stored in the beam 3 in an inclined posture.

Also, a pinion 5 is attached to the upper end of this jack cylinder 5, that is, the tip of a rod 52 that is pivotally connected to the overhang beam 3.
4 are integrally provided, and a rack 21 that engages with the pinion 54 from above when the overhanging beam 3 is stored is fixedly installed at the tip of the fixed box 2. When the overhang beam 3 is in the retracted state, the rack 21 and the pinion 54 mesh with each other, and this meshing force holds the jack cylinder 5 in the inclined retracted position, causing the rack 21 # to collide with the overhang beam 3 at the beginning of its extension and at the end of its retraction. The gear cylinder 5 is configured to be automatically oscillated from the tilted storage position to the vertical position, or vice versa, by the meshing movement of the pinion 54. In addition, in order to allow the Nihinion 54 to smoothly detach from or engage with the rack 21 when the overhanging beam 3 is extended and stored, an outer end that can be attached to the rack 21 is provided as shown in FIG. 2.3. The tips of the two-stage teeth 21M and 21b are removed in steps.

Next, the locking means for holding the jack cylinder 5 in a vertical position will be explained.
A convex portion 55 is provided on both the front and rear surfaces of the cylinder tube 51, extending from the upper end to a predetermined lower position. on the other hand,
At the lower part of the inner surface of the front and back sides of the tip of the overhanging beam 3,
The guide piece 31 is fixed along an arc curve centered on the swing fulcrum 53 of the jack cylinder 5.
The lower end surface of the convex portion 55 is opposed to the guide piece 31. The guide piece 61 is formed with an engagement opening 32 whose center line is a perpendicular line drawn from the swinging fulcrum 53 of the jack cylinder 5 and has a width that allows the convex portion 55 to engage. When the cylinder is in a vertical position, the protrusion 55 faces the upper part of the engagement recess 32, and when the cylinder is extended, the protrusion 55 enters the engagement recess 32 as shown in FIGS. It is designed to engage and hang.

Note that cutouts 22 and 33 are provided on the lower surfaces of the distal ends of the fixed box 2 and the overhanging beam 3 to allow the jack cylinder 5 to swing. Also, 23 is fixed box 2
A lock hole 64 is provided on the upper surface of the tip of the overhang beam 6.
This double-ended lock hole 23 is a lock hole provided on the upper surface of the tip of the
．． A lock pin 7 is inserted into 34 to lock the overhang beam 3 in the retracted state.

The float 6 includes a pin 56 protruding from both front and back sides of the lower end of the cylinder tube of the cylinder tube 5, and a vertically long elongated hole 62 (shown in FIG. 3) provided in the float mounting seat 61.
It is pivotally connected so that it can swing in the left-right direction.

In such a configuration, when using the outriggers, the overhanging beam 3 is extended from outside the aircraft to the side as shown in Fig. 4, the jack cylinder 5 is extended in a vertical position, and the float 6 is grounded. Float the aircraft and perform various tasks in this state. In this case, the jack cylinder 5 is locked in the vertical position by the convex portion 55 of the cylinder tube 51 engaging with the engaging recess 32 of the guide piece 31 provided on the overhang beam 3, as described above, and during work. sideways swing,
Prevents it from falling sideways.

However, when retracting the outriggers from this state,
With the jack cylinder 5 contracted and the convex portion 55 disengaged from the engagement recess 32, the overhanging beam 3 is pulled into the fixed box 2 and stored. In this case,
Immediately before the overhang beam 3 is completely retracted into the fixed box 2, the pinion 54 at the upper end of the jack cylinder 5 engages with the rack 21 of the fixed box 2, and from this point until the overhang beam 3 is completely retracted. During the stroke, the jack cylinder 5 is automatically oscillated from the vertical position to the inclined retracted position due to the meshing movement of the rack 21 and the pinion 54. At this time, the float 6 is in close contact with the lower surface of the fixed box 2 while maintaining its horizontal position.

When the overhanging beam 3 is extended out from this cap, the jack cylinder 5 changes from the inclined retracted position shown in FIG. 1.2 to the vertical position shown in FIG. When the pinion 54 is in this vertical position, the pinion 54 is automatically swung to the rack 2.
It deviates from 1.

As mentioned above, with this outrigger device in which the jack cylinder 5 is stored in the overhang beam 3 in an inclined position when the outriggers are not in use, when the jack cylinder 5 is in a vertical position when in use, Since the cylinder 5 protrudes below the overhang beam 3, in other words, the cylinder 5 can be made to protrude below the aircraft to reduce the distance from the ground, so the required stroke of the cylinder 5 to float the aircraft is is smaller than that of conventional outrigger devices. Therefore, the overall length of the jack cylinder can be reduced accordingly.

In addition, by hanging the jack cylinder 5 in a vertical position and protruding downward from the fuselage, the cylinder 5
It is possible to reduce the amount by which the plane protrudes upward from the fuselage.

Therefore, when using this outrigger device, the synergistic effect of two points: (1) being able to reduce the overall length of the jack cylinder 5, and @ being able to project the same cylinder 5 downwards into the fuselage; This means that the amount of protrusion can be kept much smaller compared to conventional devices. Therefore, there is no fear that the jack cylinder 5 will interfere with nearby work such as piling work, unlike in the past, which is very useful for work.

On the other hand, when the outriggers are retracted, the float 6 is drawn to the overhang beam 3 side together with the jack cylinder 5 and completely fits on the lower surface of the fixed box 2. In other words, the float 6 does not protrude outward from the fuselage, which is different from the conventional device. Thus, there is no need to remove the float 6 from the jack cylinder 5 one by one when driving on public roads. Also, since there is no need to attach or detach the float in this way, there is no need to suppress the weight of the float 6, so the float 6 can be attached to the outside of the aircraft in the retracted state. The float 6 can be made as large as possible without protruding in the opposite direction, thereby increasing the stability of supporting the aircraft body.

Moreover, in this device, the swinging displacement between the vertical position and the tilted storage position of the jack cylinder 5 is controlled by the pinion 54 at the upper end of the jack cylinder 5 and the fixed box 2.
Since I made it to be performed by the interlocking movement of 1,
There is no need to provide a dedicated drive source such as a hydraulic cylinder for the swinging displacement of the jack cylinder 5, and the structure in this respect is extremely simple, resulting in low costs and no need for any extra operations. . Also, the jack cylinder 5
It is possible to reliably and smoothly change the posture from the tilted storage posture to the vertical posture and vice versa.

By the way, the locking means for locking the jack cylinder 5 in the vertical position is not limited to the above embodiment. For example, a locking pin that can be elastically retracted is provided on both the front and back surfaces of the tip of the overhanging beam 3, and this locking pin can be inserted into the jack. It is also possible to automatically engage the lock pin in the lock hole provided on the cylinder 5 side, or manually insert the lock pin into the lock hole provided in both the jack cylinder 5 and the overhang beam 3. You may also do so. In addition, in the above embodiment, the cylinder 5 was installed at the tip of the overhanging beam with the cylinder tube 51 facing downward, but of course the cylinder 5 was installed with the cylinder tube 51 facing upward as in the prior art. You may. In this case, the pinion 54 may be fixed to the base end of the cylinder tube 51.

However, according to the above embodiment, since the rod 52 is hidden within the overhanging beam 3, it is possible to prevent damage to the rod 52 that is likely to occur, oil leakage, and malfunction due to this, and also prevent locking means that should be added to the cylinder 5. Since the cylinder tube 51 only needs to be processed for such purposes, the processing becomes easy.

Furthermore, the rack and pinion referred to in the present invention refer to the rack (plate-like rack) and pinion (in the narrow sense) as shown in the above embodiments.
It does not refer only to the combination of small gears, but also includes combinations such as round bar racks and small gears, pin racks and small gears, racks and pin wheels, ended chains and chain wheels, etc.

As described above, according to the present invention, when the outriggers are retracted, the jack cylinder is pulled toward the overhanging beam using the upper part as a fulcrum and is stored in the beam in an inclined position, thereby allowing the jack cylinder to move more easily than the conventional device. Since the amount by which the Tsuki cylinder protrudes upward from the machine body can be significantly reduced, it is advantageous for close work such as pile driving work. In addition, since the float can be stored within the width of the machine along with the jet cylinder, there is no need to attach or detach the float every time you drive on public roads, and the float diameter can be increased to improve stability during outrigger work. It is possible.

Further, according to the present invention, the position change operation of the above-mentioned jack cylinder from the tilted storage position to the vertical position and vice versa can be performed by the pinion and fixed box provided at the upper end of the cylinder without using a special dedicated drive source. Since this is done automatically by the meshing movement of the provided racks, the structure is simple, the cost is low, no extra operations are required, and the above posture change operation can always be performed reliably and smoothly. It is possible.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view of an embodiment of the present invention in a stored state; FIG. 2 is an enlarged view of the rack and pinion portion in the same state;
3 is a view equivalent to FIG. 2 showing the initial state of the overhanging beam, FIG. 4 is a view equivalent to FIG. 1 in the same extended state, and FIG. FIG. 6 is a schematic side view of the entire truck crane for explaining a conventional example, FIG. 7 is a plan view thereof, and FIG. 8 is an enlarged rear view thereof. 1... Traveling body frame, 2... Fixed box, 21
. . . rack, 3 . . . overhang beam, 5 . . . jack cylinder, 55 . Patent applicant Kobe Steel, Ltd.

Claims (1)

[Claims] 1. A fixed box fixed to the wheeled traveling body,
An overhanging beam that overhangs this fixed box and is fitted in a retractable manner, and a top end of this overhanging beam that can be oscillated between a vertical position and an inclined retracted position where the lower part is drawn inward of the overhanging beam. It is equipped with a jack cylinder having a float at its lower end, which is pivoted so as to be able to swing in the left and right directions using the upper part as a fulcrum. A rack that engages with the pinion is fixed at the tip of the fixed box, and the gear cylinder is moved from the tilted storage position to the vertical position by the meshing movement of the rack and pinion at the beginning of the extension of the extension beam and at the end of the retraction thereof. An IJ device for a wheel-type working machine characterized by having an S configuration that allows for reverse rocking displacement.