JPS58145553A - Outrigger device of wheeled work machine - Google Patents

Abstract

PURPOSE:To store a cylinder in a titled attitude, by pivotally mounting the cylinder to the point end part of an overhung beam to pull the cylinder toward an internal side of the overhung beam. CONSTITUTION:At storage of an outrigger, a jack cylinder 5 is contracted to separate a protrusive part 55 from an engagement hollowed part 34, under this condition an overhung beam 3 is retracted into a fixed box 2 and stored. When the cylinder 5 is contracted, a tooth 54a in the uppermost stage of a rack 54 provided to a cylinder pipe 51 is meshed and adapted from below to a meshing tooth 31a of a pinion 31 in the final contractive period of the cylinder 5, during the stroke from this point of adapted time to completion of contraction of the cylinder 5, the cylinder 5 is turned toward an internal side of the beam 3 by meshing reaction force between the meshed teeth 54a, 31a.

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. 10 to 12, this type of outrigger device is installed in two sets on both the front and rear sides of a traveling body A, each on the left and right sides, in an H-shaped arrangement as a whole, each with a fixed box B fixed to the traveling body A. An overhanging beam C is extended out and fitted in a retractable manner, and a retractable jack cylinder E having a float D at the lower end is fixed in a vertical position at the tip of the overhanging 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 the body structure due to the fact that it runs on public roads. One example of this is the height of the underside of the aircraft below the ground level c (referred to as the aircraft height). 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 jack cylinder E
The overall length of the fuselage will inevitably become longer, and the longer it will protrude upward from the fuselage. In this way, the jack cylinder protrudes for a long time above the machine body, so the jack cylinder gets in the way during so-called close work such as piling work or loading work with a truck close to the machine body, making the work extremely inconvenient. was.

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
The float is designed so that it extends completely within the legal aircraft width, but if this is done, the outer half of the float D attached to the lower end of the shirt cylinder E will protrude from within the aircraft width.

Therefore, conventionally, the float ρ 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 float D has to be made small in order to keep the number of floats 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 an outrigger device for a machine, and its configuration is as follows.

The present invention is configured such that the cylinder is pivoted to the tip of the overhang beam so as to be able to swing in the left and right directions using the upper part as a fulcrum, so that the cylinder can be drawn toward the inside of the overhang beam and stored in an inclined position. This is the basic feature, and in addition to this, the position change operation from the vertical position of the jack cylinder to the above-mentioned tilted storage position and vice versa,
A distinctive feature of the specific structure is that this is automatically performed by a rack on the side of the jack cylinder and a pinion on the side of the overhanging beam.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. Reference numeral 1 denotes a traveling body frame, 2 a fixed box fixed to the frame 1, and 3 an overhanging beam fitted over the fixed box so as to be retractable. , 4 is an overhanging cylinder, 5 is a jack cylinder attached to the tip of the overhang beam 3, and 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 1. The extending and contracting operation of the overhanging cylinder 4 causes the overhanging beam 3 to be attached to the fixed box 2. overhang,
I am trying to store it.

In the jacket cylinder 5, the cylinder tube 51 is on the lower side,
The rod 52 is placed at the tip of the overhang beam 6 in the opposite position to the conventional jack cylinder, with the rod 52 facing upward, and the rod end is pivotally connected to the overhang beam 3 via a horizontal pin 53 along the longitudinal direction of the fuselage. are doing. In this way, the jack cylinder 5
is attached to the tip of the overhanging beam so that it can swing in the left-right (width) direction of the aircraft using the upper part as a fulcrum, and when the outrigger is not in use (when driving on public roads), the cylinder 5 is moved from the vertical position.
As shown in the first section, the overhanging beam 6 is constructed so that it can be pulled inward and rotated using the upper part as a fulcrum and stored in the beam 3 in an inclined position.

Further, a rack 54 is fixed at a position facing the outside of the overhanging beam 3 on the outer surface of the upper end of the cylinder tube 51 of the jack cylinder 5 in a vertical position with teeth facing inward of the beam and continuous up and down. .

On the other hand, the pinion filter 1 is fitted onto a horizontal pin 53 serving as a swinging fulcrum of the cylinder 5 with its teeth facing outward from the overhanging beam, and is fixed to the pin 53 with bolts 32. In this way, a rack 54 that moves in the cylinder axial direction as the cylinder 5 expands and contracts is provided on the jack cylinder 5 side, and a fixed pinion 31 is provided on the overhang beam 3 side. The top tooth 54a of the rack 54 has its tip cut off to have a shorter tooth height than the other teeth, as shown in FIG.
When the jack cylinder 5 is contracted in a vertical position, the uppermost teeth 54a mesh with specific teeth (hereinafter referred to as meshing teeth) 31a of the pinion 31 from below at the final stage of the reduction (immediately before the completion of the reduction). It is configured as follows.

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 36 is fixed along an arc curve centered on the swinging fulcrum 53 of the jack cylinder 5.
The lower end surface of the convex portion 55 is opposed to the guide piece 66. The guide piece 3B is formed with an engagement recess 34 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 projection 55 to engage with the jack cylinder 5. When the cylinder 5 is in a vertical position, the protrusion 55 faces the upper part of the engagement recess 32, and when the cylinder 5 is extended, the protrusion 55 faces the engagement recess 52 as shown in Fig. 2.3. It is now possible to secure the approach.

Note that cutouts 21 and 35 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, 22 is fixed box 2
The lock hole 36 is a lock hole provided on the top surface of the tip of the overhang beam B, and this double-ended lock hole 22
．． Insert the lock pin 23 into the overhang beam 6.
is locked in the stored state.

The float 6 is installed in the left-right direction via pins 56 protruding from both front and back sides of the lower end of the cylinder tube of the jack cylinder 5, and a vertically long elongated hole 62 (shown in No. 6 and 1) provided in the float mounting seat 61. It is pivoted so that it can swing.

In the configuration, the standby time for using IJ is 5.61! As shown in d, with the overhanging beam 3 extended outward from the machine body, the jack cylinder 5 is extended in a vertical position, the float 6 is grounded to float the machine body, and various operations are performed in this state. In this case, the jack cylinder 5
As described above, the convex portion 55 of the cylinder tube 51 engages the engagement recess 34 of the guide piece 33 provided on the overhang beam 6.
By engaging with the handle, it is locked in a vertical position, preventing it from swinging or falling over during work.

When retracting the outriggers from this state, the jack cylinder 5 is contracted, the projection 55 is disengaged from the engagement recess 34, and the overhang beam 6 is pulled into the fixed box 2 and stored. .

In this case, when the cylinder 5 is contracted as described above, at the end of the contraction, the uppermost stage of the rack 54 provided on the cylinder tube 51 of the cylinder 5, as shown in FIGS. 2 to 4, is The teeth 54a mesh with the meshing teeth 31 of the pinion 31 from below, and during the stroke from this point until the contraction of the jack cylinder 5 is completed, the jack cylinder 5 is extended by the meshing reaction force of the meshing teeth 54a and 31a. Rotate towards the inside of the beam.

In this way, finally, the attitude of the jack cylinder 5 is automatically changed from the vertical attitude to the inclined retracted attitude. At this time, the float 6 is in close contact with the lower surface of the fixed box 2 while maintaining its horizontal position.

On the other hand, when changing the posture of the jack cylinder 5 from the above-mentioned inclined storage position to the vertical position (working position), for example, after the overhanging beam 6 is extended, the jack cylinder 5 is extended. In this way, at the same time as the cylinder 5 starts to extend, an engagement reaction force opposite to that at the time of contracting the jack cylinder is applied between the rack 54 and the pinion 31, so that the cylinder 5 is moved during the predetermined stroke at the beginning of the extension. Automatically oscillates into a vertical position. In this state, the tooth tip of the rack uppermost tooth 54a is located outside the tooth tip of the lower gear tooth 1b of the meshing tooth 31a on the pinion 51, and if the jack cylinder 5 is continued to be extended, the rack 54
is removed from the pinion 31 and the cylinder tube 51 is removed.
descends with In this way, by forming the height of the uppermost tooth 54a of the rack 54 to be shorter than the other teeth,
The rack 54 can be reliably engaged and disengaged from the pinion 31 in response to the expansion and contraction operations of the jack cylinder 5. In other words, according to this structure, when the jack cylinder 5 is contracted, the uppermost tooth 54a meshes with the meshing tooth 31m, and the next tooth 54b approaches and opposes the lower tooth 51b of the meshing tooth '51a. Therefore, even if the uppermost tooth 54& and the meshing tooth 31B malfunction due to errors in manufacturing or installation, the meshing action by the lower teeth 54b and 31b is performed. Therefore, the meshing between the rack 54 and the pinion 31 becomes more reliable, and the intended function of automatically changing the attitude of the jack cylinder 5 is more reliably achieved.

As described above, when using this 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, the cylinder 5 Since it protrudes below the overhang beam 3, in other words, the jet cylinder 5 can be made to protrude below the aircraft body, reducing the distance from the ground, thereby making the aircraft float. The cylinder for 5
The required stroke is smaller than that of the conventional method.

Therefore, the overall length of the jack cylinder 5 can be reduced accordingly. Furthermore, by allowing the cylinder 5 to protrude downward from the machine body in a vertical position, the amount by which the cylinder 5 protrudes upward from the machine body can be reduced by J compared to the conventional device.

Therefore, when using this outrigger device, (a) the overall length of the jack cylinder 5 can be reduced, and (b) the cylinder 5 can be protruded downward from the fuselage due to the synergistic effect of the two points. The amount of protrusion can be significantly reduced 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 6 side together with the jack cylinder 5 and completely fits under 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 each time when driving on public roads. Furthermore, by eliminating the need to attach and detach the float, there is no need to suppress the weight of the float 6, so the float 6 can be made as large as possible without protruding outward from the fuselage in the stored state. This increases the stability of the aircraft support and provides scales.

Furthermore, in this device, the swinging displacement of the jack cylinder 5 between the vertical position and the tilted storage position is performed by the meshing movement of the rack 54 provided on the jack cylinder 5 and the pinion 31 provided on the overhang beam 3. As a result, 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, the cost is low, and there are no unnecessary operations. is no longer necessary.

Next, an fJ2 embodiment of the present invention will be described with reference to FIGS. 7 to 9.

In this second embodiment, the cylinder 5 and the cylinder 7 are moved together only at the end of contraction and at the beginning of expansion, and at other times the rack 7 is separated from the cylinder 5 and the pinion is constantly moved. 31 and is in an engaged state. That is, in the above-described first embodiment, an L-shaped rack fitting frame 57 is provided on the outer surface of the upper end of the cylinder tube of the jack cylinder 5 to which the bracket 54 is fixed.
is firmly attached. This rack fitting frame 57 is provided with a keyhole-shaped notch 57a that opens upward at the upper end. On the other hand, the rack 7 is made separately from the jack cylinder 5, and has a leg part 71 that can be fitted into the rack fitting frame 57 at the lower part thereof, and a stepped hole 72 at the base of the leg part 71. An engaging body 74 is provided in the stepped hole 72 via a spring 7.
゛・ is fitted elastically so that it can appear and retract freely. Furthermore, vertically long grooves 75, 75 are provided on both the front and rear surfaces of the rack 7.

On the other hand, a pair of front and rear protrusions 37.37 are protruded from the upper part of the inner surface of the tip wall of the overhanging beam B. Pin inlet/outlet holes 37a are provided on both upper and lower sides of the filter 7. In addition, the cylinders 37b are fixed to the positions where the pin entry/exit holes 37a are provided on the outer surfaces of the protruding pieces 37, 37, and the rack holding pins 38 are inserted into the respective cylinders 37b.・The tip・
are elastically held via springs 38a while protruding from the pin inlet/outlet holes 37&. Furthermore, the same protruding piece 37.3 on the tip wall of the overhanging beam 3
A push pin 39 is fixed at a position below 7. The tip surface 39a of the push pin 39 and the tip surface 74a of the engaging body 74 of the rack 7 are formed into corresponding inclined surfaces.

Therefore, the rack 7 and the pinion 61 are always in mesh with each other, and when the jack cylinder 5 is in the extended position,
The rack 7 is separate from the cylinder 5. At this time, the rack 7 is held within the overhang beam 3 by being pinched from the front and back by the rack holding pins 68 fitted into the grooves 75, 75 on both the front and rear surfaces. Also, at this time, the push pin 39
is inserted into the step hole 72 of the rack 7 and the engaging body 74 is inserted into the step hole 7.
It is pushed inside 2.

When the cylinder 5 is contracted from this state, the rack fitting frame 57 fits into the rack 7 at the end of the contraction, and the contracting force of the cylinder 5, that is, the upward force of the cylinder tube 51 is applied to the rack 7. It is added to the meshing part of the pinion 31. Therefore, as in the case of the first embodiment, the gear cylinder 5 is automatically swung into the tilted storage position by the meshing reaction force acting on the meshing portion. At this time, since the push pinge 9 is difficult to disengage from the stepped hole 72 of the rack 7, the engaging body 74
7a, whereby the rack 7 and the jack cylinder 5 are integrally connected.

Then, when the jack cylinder 5 is extended next, the jack cylinder 5 is oscillated to a vertical position by the reaction force of the engagement between the rack 7 and the pinion 31 at the beginning of the extension. In this way, when the jack cylinder 5 is in the vertical position,
When the engaging body 74 is pushed by the push pin 39 and inserted into the step hole 72, the connection between the rack 7 and the rack fitting frame 37 is released, and at the same time, the rack holding pins 68 are pushed into the groove 75 of the rack 7. It gets stuck in .75. Therefore, if the jack cylinder 5 is subsequently extended, the rack fitting frame 37 will separate from the rack 7, and the jack cylinder 5 will extend with the rack 7 remaining.

According to the configuration of the second embodiment, the rack 7 and the pinion 3
1 are always in mesh with each other, there is no problem of these malfunctions, and therefore the automatic attitude change operation of the jack cylinder 5 becomes even more reliable.

By the way, the cylinder tube 5
According to this device installed at the tip of the overhanging beam with the rod 52 facing downward and the rod 52 facing upward, the rod 52 is hidden within the overhanging beam 3, so the rod 5 is likely to
Damage to the cylinder 2, oil leaks, and malfunctions caused by this can be prevented, and the processing for locking means and the like that should be added to the cylinder 5 can be easily performed because the cylinder tube 51 only needs to be processed.

In the present invention, the locking means for locking the jack cylinder 5 in the vertical position is not limited to the above-mentioned embodiment. It is also possible to automatically engage the lock pin with a lock hole provided on the jack cylinder 5 side, or
Alternatively, a lock pin may be manually inserted into a lock hole provided in both sides of the overhang beam 6 and picked up.

As described above, according to the present invention, when the outriggers are retracted, the jack cylinder is drawn into the overhanging beam using the upper part as a fulcrum and is stored in the beam in an inclined position, thereby making it more advantageous than conventional outrigger devices. This makes it possible to significantly reduce the amount of upward protrusion of the jack cylinder, which is very advantageous for close work such as pile driving. Also,
Since the float can be stored within the width of the machine along with the jack 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.

Further, according to the present invention, the rocking displacement between the vertical position and the tilted storage position of the above-mentioned jack cylinder is performed using the meshing movement between the rack on the jack cylinder side and the pinion on the overhanging beam side. As a result, there is no need to provide a dedicated drive source such as a hydraulic cylinder for the swinging displacement of this jack cylinder, and the structure is extremely simple, resulting in low costs and unnecessary operations. Nothing is needed.

Further, according to the invention described in claim 2: 1. As described above, in the simple structure in which the rack is integrated with the jack cylinder, the meshing between the rack and the pinion is highly reliable; The posture change operation of the jack cylinder can be made more reliable.

[Brief explanation of the drawing]

FIG. 1 is a vertical cross-sectional view of an embodiment of the present invention in a retracted state, FIG. 2 is an enlarged view of the cylinder portion when the cylinder is in a vertical position in the same embodiment, and FIG. 4 is an enlarged view of the rack and pinion part in the state shown in FIG. 2, FIG. 5 is a view equivalent to FIG. 5
FIG. 7 is an enlarged sectional view taken along the line ■-■ in FIG. 10 is a schematic side view of the entire truck crane for explaining the conventional example, FIG. 11 is a plan view thereof, and FIG. 12 is an enlarged rear view thereof. 1... Traveling body frame, 2... Fixed box, 3...
...Extended beam, filter 1...pinion, 31a...
Meshing teeth, 4... overhanging cylinder, 5... jack cylinder, 51... cylinder tube, 52...
Mouth/throat, 54... rack, 54a... top tooth,
6...Float, 7...Rack. Patent applicant: Kobe Steel, Ltd. Figure 2 Figure U Figure 11 Figure 1Z

Claims (1)

[Claims] 1. A fixed box fixed to a wheeled traveling body;
The fixed box is provided with an overhanging beam that is overhanging and retractably fitted into the fixed box, and a jack cylinder provided at the tip of the overhang beam and having a float at the lower end, and the jack cylinder is connected to the end of the overhang beam. In contrast, the upper end of the rod is used as a fulcrum so that the cylinder tube is on the lower side and the rod is on the upper side, and the upper end of the rod is used as a fulcrum so that it can be oscillated between a vertical position and an inclined retracted position where the lower part of the overhanging beam is drawn inward. A rack is mounted on the outer surface of the upper part of the cylinder tube of this jack cylinder in a vertical position that continues vertically with the teeth facing inward of the overhanging beam. The binion is fixed in a position with its teeth facing outward from the overhanging beam, and at the end of the contraction of the jack cylinder, predetermined teeth of the rack and the binion are engaged with each other, and the reaction force of the engagement causes the jack cylinder to move to the tilted storage position. An outrigger device for a wheel-type working machine, characterized in that it is configured to cause rocking displacement. 2. A fixed box fixed to the wheeled traveling body,
The fixed box is provided with an overhanging beam fitted in a retractable manner and overhanging the fixed box, and a jack cylinder provided at the tip of the overhang beam and having a float at the lower end. On the other hand, the cylinder tube is on the lower side and the rod is on the upper side, and the upper end of the rod is used as a fulcrum to swing left and right between a vertical position and an inclined retracted position in which the lower part of the overhanging beam is drawn inward. A rack is fixed on the outer surface of the upper part of this jack cylinder in a vertical position that continues vertically with the teeth facing inward of the overhanging beam, while a binion is attached to the tip of the overhanging vinyl. is fixed in such a manner that the teeth face outward from the overhanging beam, and the tooth height of the topmost tooth of the rack is formed shorter than the others, so that the topmost tooth of the rack is fixed at the end of the reduction stage of the jack cylinder. 1. An outrigger device for a wheel-type working machine, characterized in that the outriggers are configured to mesh with predetermined teeth of a pinion, and the reaction force of the meshing causes the jack cylinder to swing into the tilted storage position.