JPS5849544A - Out-rigger equipment of wheel type working machine - Google Patents

Abstract

PURPOSE:To minimize the extension of a jack cylinder of an out-rigger above a machine by pivoting the jack cylinder to the extremity of a sponson beam so as to be swung left and right. CONSTITUTION:When an out-rigger is used, a stretchable cylinder 4 is stretched to force a sponson beam 3 to the exterior of a machine. At this time, a rod 42 is played to move in the range of the length of the free movement of the pins 31 and 32 inside a slot 44. During the stroke of the idle travel of the rod 42 a link mechanism 7 is turned to displace the jack cylinder 5 from the inclined and housed state to the vertical one. By stretching the jack cylinder 5, the machine is lifted from the ground.

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, rough terrain 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 installed in a fixed box B installed in a letter-shaped arrangement and fixed to the traveling body A, and the overhanging beam C is fitted in a retractable manner, and a telescopic jack having a float D at the lower end is attached to the tip of the overhanging beam C. It is constructed by fixing a cylinder E in a vertical position.

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 of these is the height of the underside of the aircraft from the ground (hereinafter referred to as the aircraft height). Therefore, the jack cylinder E of the outrigger device is required to have an extension stroke equal to 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 above the machine for a long time, so the jack cylinder gets in the way during so-called close-range work such as piling work and loading with a truck close to the machine, making the work very 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
Although it is designed so that it fits completely within the legal aircraft width, 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 every time the vehicle was driven on a public road, 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 weight of the float small, which is disadvantageous in terms of the stability of supporting the aircraft body.

Furthermore, the cylinder tube E1 is
According to the conventional device installed at the tip of the overhanging beam C with the rod E2 facing upward and the rod E2 facing downward, when the outrigger is used, the outside may be applied to the rod E2 exposed to the outside, damaging the rod E2 or damaging the seal. There is also a problem in that the sealing performance of the cylinder E is likely to deteriorate, or foreign matter is likely to adhere to the cylinder, causing oil leakage, malfunction, etc.

In view of the above points, the present invention makes it possible to suppress the amount of upward protrusion of the jack cylinder into the machine body while adhering to legal restrictions, and also allows the float to be kept within the width of the machine body in the retracted state. It is an object of the present invention to provide an outrigger device for a wheel-type working machine that can protect the rod of a jack cylinder and improve the durability of the cylinder, 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 an additional feature is that the above-mentioned jack cylinder is attached to the overhang beam in such a position that the cylinder tube is on the bottom and the rod is on the top.

Embodiments of the present invention will be described below with reference to the drawings.

1 is a traveling body frame, 2 is a fixed box fixed to the frame 1, 6 is an overhanging beam that extends over this fixed box 2 and is fitted in such a manner that it can be stored, and 4 is an overhang for extending and storing this overhanging beam 6. The cylinder 5 is a jack cylinder attached to the tip of the overhanging beam B, and 6 is a float attached to the lower end of the jack cylinder 5.

In the jacket cylinder 5, the cylinder tube 51 is on the lower side,
The upper end of the rod is pivotally connected to the tip of the overhanging beam via a horizontal pin 53 along the front-rear direction of the fuselage, with the rod 52 facing upward, which is the opposite attitude to the conventional jack cylinder. 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 with the upper part as a fulcrum, and when the outriggers are retracted, the cylinder 5 is extended in an inclined position as shown in Fig. 1. It is stored in the beam filter, and when in use, the cylinder 5 is swung into a vertical position and the cylinder tube 51 is pushed out downwards while the rod 52 remains in the extended beam 5-6. ing.

The overhanging cylinder 4 has the proximal end of the cylinder tube 41 attached to the inner surface of the fixed box 2, and the tip of the rod 42 to the inner surface of the tip end of the overhanging beam B.The overhanging cylinder 4 extends and contracts to extend the overhanging beam 6. It can be extended and retracted from the fixed gear 2. The connection structure between the overhang cylinder 4 and the overhang beam B will be described in detail. A bracket 46 is fixed to the rod end of the overhang cylinder 4, and a long hole 44 is provided in the bracket 43 along the direction of expansion and contraction of the cylinder. On the other hand, the overhanging beam B has two horizontal pin holes 1. Ro2
are fixedly installed with a space between them that is smaller than the length of the elongated hole 44, and both pin holes 1. The filter 2 is inserted into and engaged with the elongated hole 44 so as to be movable within a certain length range. In this way, the rod 42 of the overhanging cylinder 4 is connected to the overhanging beam B.
Extends within a certain length range and moves freely in the retracting direction (idle movement)
They are connected seamlessly.

6- Also, the bracket 46 fixed to the rod end of the overhanging cylinder 4 includes a link mounting seat 45 fixedly installed below the bracket, a link mechanism 7 consisting of first and second rings 71 and 72, and a jack cylinder. It is interlocked and connected to the jack cylinder 5 via a link mounting seat 54 fixed to the tip of the rod 5. First link 71 of link mechanism 7
It is formed into a dogleg shape, and its center is pivotally connected to the overhang beam B via a fixing pin 6. The second link 72 is
They are pivotally connected to this first link 71 via a movable pin 7 so as to be rotatable with each other. Further, the first link 71 and the link mounting seat 45 are pivotally connected via an elongated hole 46 in order to convert the linear motion of the rod 42 into rotational motion of the first link 71.

Next, a locking means for locking the jack cylinder 5 in the vertically extended position will be explained. The cylinder tube 51 of the jack cylinder 5 has convex portions 55 protruding from the upper end to the vicinity of the lower end on both the front and rear sides. This convex portion 55 has an outer half 55a in the width direction of the fuselage and an inner half 55b.
(hereinafter, the outer half portion 55a will be referred to as a high portion, and the inner half portion 55b will be referred to as a low portion). On the other hand, left and right blocks 64. The filter 5 is fixed, and this block 34
．． An engagement opening 6 is formed between 35 and 35. The engaging concave portion 6 has a width dimension that allows the high portion 55a to engage with a position facing below the high portion 55a of the convex portion 55 of the cylinder 5 when the cylinder 5 is in the vertically contracted position. It is formed by Therefore, when the jack cylinder 5 is extended in a vertical position, the high portion 55a of the convex portion 55 enters and engages the engagement concave portion 6 from above.

Also, to explain the structure for holding the jack cylinder 5 in a vertically contracted position, a lock pin 8 is elastically attached to the inside of the overhang beam filter via a compression coil spring 81 at the lower end of the longitudinal direction and side surface of the tip of the overhang beam filter. It is kept at will. A vertically long head 82 is connected to the end of the lock pin 8 that projects outside the overhang beam 6.
A pair of cam pieces fixed to the lower outer surface of the tip of the fixed box 2 at a predetermined interval vertically. , 9. On the outer surface of this cam piece, a slanted cam surface 91 is formed that slopes toward the tip of the fixed box 2, and as the overhanging beam moves, the head 82 of the lock pin 8 moves onto this cam surface. By sliding 91,
The lock pin 8 projects inward of the overhanging beam 6, and the tip of the lock pin 8 is configured so as to finally come into contact with the lower portion 55b of the convex portion 55 of the jack cylinder 5 in the vertically contracted position. Lock pin 8 to this convex lower part 55b
Due to this abutting engagement, the jack cylinder 5 is prevented from swinging inward of the overhanging beam in the vertically contracted position.

Note that a notch 21. is provided on the lower surface of the tip of the fixed box 2 and the overhang beam O to allow the swinging of the jack cylinder 5. ro/ is provided. Also, in Figure 1, 2
2 is a lock pin for locking the overhanging beam in the retracted state.

The float 6 is installed in the left-right direction through pins 56 protruding from both front and back sides of the upper end of the cylinder 9-tube 51 of the jet cylinder 5, and a long hole 62 (shown in FIG. 4) provided in the float mounting seat 61. It is pivoted so that it can swing.

Next, the effect will be explained.

When using the outriggers, extend the overhang cylinder 4 from the state shown in Fig. 1 to extend the outrigger beam to the outside of the fuselage as shown in Fig. 5, and then extend the jack cylinder 5 in a vertical position to open the float 6. The aircraft is grounded and the aircraft is floated, and various operations are performed in this state.

Therefore, when the overhanging cylinder 4 starts to extend when the overhanging beam filter is extended, the rod 42 of the cylinder 4 moves the length of the free movement of the pin 31, 32 within the elongated hole 44 of the bracket 4. During the idle movement stroke of the rod 42, the link mechanism 7 is rotated in the direction of the arrow in FIG.
The jack cylinder 5 is automatically and forcibly oscillated from the tilted storage position to the vertical position shown in FIG.

10- At this point, the pins 51 and 32 have finished their free movement within the elongated hole 44, and from this point on, the overhanging beam B will begin to extend.

On the other hand, when the jack cylinder 5 is in the vertical position as described above, the tip of the lock pin 8 is in a state facing the lower part 55b of the convex s55 of the jack cylinder 5, as shown in Fig. 6.4. From this state, as the overhanging beam B moves, the lock pin 8 protrudes into the overhanging beam 6 by the guiding action of the cam surface 91.91 of the cam piece 9.9 provided on the fixed box 2, as described above, and eventually The convex portion contacts the lower portion 55b. This makes it possible to prevent the jack cylinder 5 from swinging while the overhanging beam filter is moving.

When the jack cylinder 5 is extended after the overhang beam is extended, the high portion 55a of the convex portion 55 engages with the engagement recess 66 formed on the inner surface of the overhang beam B, so that the cylinder 5 is extended vertically. Locks into position, prevents sideways swinging and falling during work.

Next, when storing the outriggers, the jack cylinder 5 is contracted, and the overhanging beam 6 is pulled into the fixed box 2 with the high convex portion 55a disengaged from the engagement recess 66 and stored. At the beginning of the retraction of the overhanging beam, the rod 42 of the overhanging cylinder 4 attempts to move independently in the opposite direction to when it is extended, but at this time, the jack cylinder 5 is prevented from swinging in the direction of the tilted posture by the lock pin 8. condition, and the link mechanism 7 does not operate.
Simultaneously with the movement of the rod 42 of the overhang cylinder 4, the overhang beam filter starts moving. Then, just before the overhang beam is completely retracted, the head 82 of the lock pin 8 is connected to the cam piece 9,
By climbing the cam surface 91.91 of 9, the lock pin 8 separates from the lower convex portion 55b, and the jack cylinder 5
The vertical line is released long in a small posture. Therefore, from the time when the overhanging beam B is completely retracted, the rod 42 of the overhanging cylinder 4 moves independently in the opposite direction to when it was extended, and during this time, the jack cylinder 5 is moved by the action of the link mechanism 7 as shown in FIG. It is automatically displaced from the vertical position to the tilted storage position shown in FIG. At this time, the float 6 is in close contact with the lower surface of the fixed box 2 in a horizontal position.

In this way, when the outriggers are retracted, the jack cylinder 5
When using this outrigger device in which the cylinder is housed in the overhang beam 6 in an inclined position, the cylinder 5 protrudes below the overhang beam 6 when the cylinder 5 is placed in a vertical position during use. Since the jack cylinder 5 can be made to protrude downward from the aircraft body to reduce the distance from the ground, the required stroke of the cylinder 5 to float the aircraft body is smaller than that of the conventional one. Therefore, the overall length of the jack cylinder 5 can be reduced accordingly. Further, 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 made smaller 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 protrudes downward from the fuselage due to the synergistic effect of the scales. The amount of upward protrusion of the fuselage 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. , thereby increasing the stability of the aircraft support.

14- Also, install the jack cylinder 5 on the overhang beam B in the opposite position from the conventional one, with the cylinder tube 51 on the bottom and the rod 52 on the top, and when using the outriggers, attach the cylinder tube 51 instead of the rod 52 When using this outrigger device configured to push downward, the rod 52 is protected within the overhanging beam 6 during use, so damage to the rod 52 and sealing of the seal portion by external forces applied to the rod 52 are avoided. This prevents oil leaks, malfunctions, etc., and improves the performance of the cylinder 5.
It has excellent durability. In addition, since the locking means on the cylinder side for locking the cylinder 5 in the vertical position, that is, the convex portion 55 in the second embodiment may be provided on the cylinder tube 51, the cylinder The processing to be performed on the 5th side becomes easier.

By the way, in the present invention, the means for swinging the jack cylinder 5 between the vertical position and the tilted storage position can be modified as appropriate other than the above-mentioned embodiment. By pressing this projecting piece against the tip of the fixed box 2 when the outriggers are stored, the jack cylinder 5 is displaced to a vertical position, and when the outriggers are used, the cylinder 5 is swung to the vertical position by its own weight. You can also make it wet. Further, regarding the locking means for locking the same jack cylinder 5 in a vertical position, for example, a lock pin is provided on both front and rear surfaces or one side of the tip of the overhanging beam filter so as to be elastically retractable, and this lock pin is attached to the jack lifter 5 side. It is also possible to automatically engage the provided lock hole. or,
A lock pin may be manually inserted into a lock hole provided in both the jack cylinder 5 and the overhang beam 6.

As described above, according to the present invention, when the outrigger is 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. As a result, the amount by which the jack cylinder protrudes upward from the machine body can be significantly reduced by 1, which is very advantageous for close work such as piling 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.

Furthermore, according to the present invention, the cylinder is mounted on the overhang beam in the opposite position to the conventional one, with the cylinder tube facing downward and the rod facing upward. The influencing rod can always be protected within the overhanging beam, thereby making it possible to prevent the operational troubles of the jack cylinder, which have frequently occurred in the past, and improve durability.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional front view of an embodiment of the present invention in a stored state;
Figure 2 is a longitudinal sectional front view of the jack cylinder displaced to the vertical position during the same use, and Figure 6 is Figure 2 III.
- An enlarged sectional view along line III, Figure 4 is Figure 6 IV-I
5 is a longitudinal sectional view taken along the V line, FIG. 5 is a longitudinal sectional front view of the 17-state state of use, FIG. 6 is a schematic side view of the entire truck crane for explaining the conventional example, and FIG. 7 is a plan view of the same.
FIG. 8 is an enlarged rear view of the same. 1... Traveling body frame, 2... Fixed box, 6...
... Overhanging beam, 5... Jacket cylinder, 51.
・・Same cylinder tube, 52・・Same rod, 56・
...Pin as the swinging fulcrum of the same cylinder, 6...Float. Patent applicant: Kobe Steel, Ltd. 18- Figure 2-248- Figure 3

Claims (1)

[Claims] 1. 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 having a float at the lower end attached to the tip of the overhang beam. 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. An outrigger device for a wheel-type working machine characterized by being pivoted so as to be swingable in a direction.