JPH04115886U - Crane outrigger device - Google Patents

Abstract

(57) [Summary] [Purpose] To increase the effective stroke of an overhanging cylinder by reducing its attachment dimensions to an outrigger beam without increasing the overall length of the extended cylinder in its contracted state. [Structure] A bracket 13 is attached to the attachment end of the overhanging cylinder 6 to the outrigger beam 2 in a direction perpendicular to the axis of the cylinder 6.
is provided with a pair of attachment parts 16, 16 extending in the direction of the proximal end of the outrigger beam, and these attachment parts 16, 16 are attached to the outrigger beam 2 with an axis 19, which is orthogonal to the cylinder axis.
It is attached by 19.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention is a crane that improves the mounting structure of the overhanging cylinder to the outrigger beam. This relates to the outrigger device of the engine.

0002

[Conventional technology]

The outrigger device of a crane is stretched out to the side of the vehicle body during crane work, causing damage to the vehicle body. It plays the role of lifting and supporting and increasing the lifting capacity.

0003 The configuration of a conventional outrigger device will be explained with reference to FIGS. 3 to 5.

0004 1 is an outrigger box fixed to the traveling body frame of the lower traveling body (not shown) Then, outrigger beam 2 slides into this outrigger box 1 in a telescopic manner. The outrigger beam 2 An outrigger jack 3 that expands and contracts in the vertical direction is provided at the tip.

[0005] 4 is the jack cylinder of this outrigger jack 3, 5 is the outrigger float It is.

[0006] The extending cylinder 6 that extends and stores the outrigger beam 2 is a cylinder tube. The proximal end of the outrigger box 7 is connected to the proximal end of the outrigger box 1 via the proximal bracket 8. It is attached by a flat shaft 9, and the tip of the rod 10 is inserted through the tip side bracket 11. It is attached to the tip of the outrigger beam 2 by a horizontal shaft 12.

[0007]

[Problem that the idea aims to solve]

In such an outrigger device, the extension width of the outrigger beam 2 (outrigger beam 2) The larger the amount of protrusion from trigger box 1), the higher the stability of the original vehicle body support. Therefore, the rated hanging load increases accordingly.

[0008] In this case, the length of the outrigger beam 2 depends on the length of the outrigger box 1. Since the length of the outrigger box 1 is determined by the vehicle width, the length of the outrigger box 1 is determined by the vehicle width. In order to increase the overhang width of the outrigger beam 2 for a vehicle width of The stroke length of the cylinder 6 should be made as long as possible.

[0009] However, since the mounting position on the proximal end side of the overhanging cylinder 6 is limited by the vehicle width, The cylinder 6 cannot be extended toward the proximal end.

0010 On the other hand, an outrigger jack 3 is installed on the extension line of the rod side of the overhanging cylinder 6. The jack 3 determines the front end position of the rod side end, so the overhang Therefore, the cylinder 6 cannot be extended toward the rod side.

[0011] Therefore, there is an upper limit for the total length L1 of the cylinder 6 in the contracted state, and within that In order to increase the stroke length, an overhanging cylinder for outrigger beam 2 must be It is necessary to reduce the mounting dimension L2 of the holder 6.

0012 However, in this case, with the conventional outrigger device, the outrigger beam 2 As a means of mounting the cylinder rod side end, attach a bracket to the rod end as shown. The bracket 11 is installed so as to protrude in the direction of the cylinder axis, and this bracket 11 is attached to the horizontal axis 12. Since it is attached to the outrigger beam 2, the dimensions required for attaching this rod side end are The modulus L2 becomes longer.

[0013] Therefore, out of the limited total cylinder length L1, the mounting dimension L2 becomes longer. Since the cylinder tube 7 and rod 10 have to be shortened, the overhang cylinder The effective stroke of Da 6 was to be reduced. For this reason, especially in recent When the vehicle width is reduced in response to the demand for smaller cranes, the overhang width also increases. This caused a problem in that the rated hanging load decreased.

[0014] Therefore, in this invention, the overall length of the extended cylinder in the contracted state is not made long. , the same series by minimizing the mounting dimensions of the same cylinder to the outrigger beam. We propose a crane outrigger device that can increase the effective stroke of the crane. This is what we provide.

[0015]

[Means to solve the problem]

This invention consists of an outrigger box fixed to the undercarriage of a crane and a The outrigger beam, which extends over the outrigger box and is retractably fitted, and this The outrigger box is provided between the tip of the outrigger beam and the base of the outrigger box. Out of the crane equipped with an overhanging cylinder that extends and retracts the trigger beam In the rigging device, attachment to the outrigger beam in the above-mentioned overhanging cylinder A bracket is attached to the end in a direction perpendicular to the axis of the cylinder. The kit is provided with a pair of attachment parts that extend toward the proximal end of the outrigger beam. Both mounting parts are attached to the outrigger beam by an axis perpendicular to the cylinder axis. It is something that is attached.

[0016]

[Effect]

According to this configuration, it is necessary to attach the overhang cylinder to the outrigger beam. The dimensions of the bracket are not the length of the distal end bracket as in the conventional case. This installation dimension can be reduced because the thickness of the mounting plate is sufficient. Therefore, this The length of the cylinder tube and rod can be lengthened by the reduction, so the length of the cylinder can be increased. Effective stroke can be increased.

[0017]

【Example】

An embodiment of the present invention will be described with reference to FIGS. 1 and 2.

[0018] In this example, the same parts as those in the prior art shown in FIGS. 3 to 5 are given the same reference numerals. They are shown with numbers and their repeated explanations are omitted.

[0019] A bracket 13 is attached to the end of the rod 10 in the overhanging cylinder 6. There is.

[0020] This bracket 13 has a vertical wall 14 orthogonal to the cylinder axis, and The tip of the pad 10 fits into the connecting hole 15 provided in the center of the vertical wall 14. It is fixed in place by welding, etc.

[0021] The bracket 13 also has mounting walls 16, 16 on both the front and rear sides of the vertical wall 14. Parallel to both front and rear walls of trigger beam 2, point it in the direction of the base end of the beam (outrigger jack). A mounting hole 17 is provided in the mounting walls 16, 16 on both sides. , 17 are provided.

[0022] On the other hand, on both the front and rear walls of the outrigger beam 2, the overhanging cylinder 6 is in a reduced state. Cylindrical bosses 18, 18 are fixed inward at locations facing the mounting walls 16, 16 on both sides. At the same time, horizontal mounting pins 19, 19 pass through these bosses 18, 18, and One end is fixed to the bosses 18, 18, and this mounting pin 1 The other ends of 9, 19 are fitted into the mounting holes 17, 17.

[0023] As a result, the mounting walls 16, 16, that is, the bracket 13 is attached to the outrigger beam. 2, the expansion and contraction force of the extending cylinder 6 is connected to the bracket 13, the mounting pins 19, 1 9. It is transmitted to the outrigger beam 2 via the bosses 18, 18, and the same beam 2 is extended. and is configured to be stored.

[0024] Place the rod side end of the overhang cylinder 6 against the outrigger beam 2 as shown above. According to this installed outrigger device, the overhanging series for the outrigger beam 2 is The dimensions in the cylinder axial direction required for installing the cylinder 6 are as follows: Not the length dimension L2 of the racket 11, but the thickness dimension of the bracket 13 (vertical wall 14) The thickness dimension L3 is much smaller than the conventional bracket length dimension L2. Since it is small, this installation dimension can be reduced.

[0025] In the illustrated example, the bosses 18, 18 are closer to the outrigger jack than the bracket 13. Although the bosses 18 and 18 are slightly protruding toward the 3 side, as shown in FIG. is far enough away from outrigger jack 3, so even if it protrudes like this, There is no problem in the direction.

[0026] Therefore, according to this configuration, within the total length L1 in the cylinder contracted state, this mounting The cylinder tube 7 and rod 10 can be reduced by the size (L2-L3). The length can be increased. Therefore, the effective stroke of the same cylinder is increased. can be done.

[0027] By the way, the hydraulic piping of the overhanging cylinder 6 does not move due to its expansion and contraction operation. As shown in the above example, the rod side is usually attached to the outrigger beam 2. However, if there is no problem with the hydraulic piping, conversely connect the rod side to outrigger box 1, The cylinder tube side may be attached to the outrigger beam 2 with the above configuration.

[0028] In addition, the present invention allows the outrigger beam 2 to be extended horizontally as shown in the above embodiment. The so-called H-type outrigger lifts the vehicle body with the outrigger jack 3 After extending the outrigger beam, the outrigger box together with the beam The so-called Can be applied.

[0029]

[Effect of the idea]

As mentioned above, when using the present invention, the outrigger beam in the overhanging cylinder Attach the bracket to the mounting end of the cylinder in a direction perpendicular to the axis of the cylinder. The bracket is provided with a pair of mounting parts extending in the direction of the proximal end of the outrigger beam, Attach both mounting parts to the outrigger beam using an axis perpendicular to the cylinder axis. Therefore, the dimensions required for installing the overhang cylinder to the outrigger beam are is not the length of the conventional distal bracket, but is much smaller than this. The thickness of the bracket is sufficient.

[0030] Therefore, this installation dimension can be reduced, and by this reduction, the cylinder tube And since the length of the rod can be made longer, the total length of the extended cylinder in the contracted state can be increased. The effective stroke of the same cylinder can be increased without making it longer.

[0031] Therefore, compared to conventional equipment, the overhanging width of the outrigger beam has been increased for the same vehicle width. The width of the vehicle can be reduced while maintaining the same overhang width.

[Brief explanation of drawings]

FIG. 1 is a partial horizontal sectional view of an outrigger device showing an embodiment of the present invention.

FIG. 2 is a sectional view taken along the line II-II in FIG. 1;

FIG. 3 is a vertical sectional view showing a conventional outrigger device.

FIG. 4 is a horizontal sectional view of the outrigger device.

FIG. 5 is a partially enlarged view of FIG. 3;

[Explanation of symbols]

1 Outrigger box 2 Outrigger beam 6 Overhanging cylinder 7 Cylinder tube 10 of the cylinder 10 Rod 13 Bracket 14 attached to the rod side end Vertical walls 16, 16 perpendicular to the cylinder axis of the bracket A pair of mounting walls of the bracket (Mounting part) 18, 18 Boss for mounting the bracket 19, 19 Mounting pin (axis perpendicular to the cylinder axis)

Claims (1)

[Scope of utility model registration request] Claim 1: An outrigger box fixed to a lower running body of a crane, an outrigger box overhanging the outrigger box,
A crane outrigger device comprising an outrigger beam fitted in a retractable manner, and an overhanging cylinder provided between a distal end of the outrigger beam and a base end of an outrigger box to extend and store the outrigger beam, A bracket is attached to the attachment end of the overhanging cylinder to the outrigger beam in a direction perpendicular to the axis of the cylinder, and this bracket is provided with a pair of attachment parts extending toward the proximal end of the outrigger beam. An outrigger device for a crane, wherein the outrigger section is attached to the outrigger beam by an axis perpendicular to the cylinder axis.