JPH10310371A - Winch fitting structure in wheel crane - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve a problem that winch device fitting space is narrowed by a reinforcing part or the reinforcing part covers over a drum in case of providing the reinforcing part on the outer surface side of a boom supporting plate for supporting a boom in conventional winch fitting structure. SOLUTION: In a wheel crane with a winch device 3 arranged at the outside part of one boom supporting plate 21, a reinforcing part 22 of outward protruding shape is formed at the upper end part of the boom supporting plate 21 on the arranged side of the winch device 3, over a specified length range in the lengthwise direction of the boom supporting plate 21, and the winch device 3 is fitted in such a way that a reduction gear 5 is positioned below the reinforcing part 22 in the posture of the reduction gear 5 facing the boom supporting plate 21 and that the reinforcing part 22 and the reduction gear 5 overlap at least partially from the top view. There is therefore no hindrance to fitting of the winch device 3 even in case of providing the boom supporting plate 21 with the reinforcing part 22.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wheel crane in which a winch device is arranged on a side of a boom on a swivel base, and more particularly to a winch mounting structure in such a wheel crane.

[0002]

2. Description of the Related Art In a conventional wheel crane, a winch device is mounted on a swivel at the rear of a boom, at a rear end of a boom, or on a swivel at a side of the boom. Things, etc.

However, the arrangement of the winch device on the swivel table behind the boom has the disadvantage that the length of the swivel projecting rearward becomes long and the turning radius at the rear end of the swivel table becomes large. Also, in the case where the winch device is arranged on the upper surface of the rear end of the boom, when the elevation angle of the boom becomes large,
The winch device protrudes rearward, and there is a risk that the winch device will interfere with the structure, especially when turning.

FIGS. 5 and 6 show a conventional example in which a winch device is arranged on a swivel table on the side of a boom. FIG. 5 shows a partial plan view of a wheel crane. This conventional wheel crane has a swivel 2 mounted on a vehicle body 1 and a pair of left and right boom support plates on the swivel 2. 21 and 21 are erected. A base end of the boom 11 is pivotally connected between the boom support plates 21 and 21 by a shaft 13. In this type of wheel crane, the center between the two boom support plates 21 and 21 is required to secure an installation space for the cab 10 outside one of the boom support plates 21 (the upper boom support plate in FIG. 5). (Center line Q) is slightly smaller than the rotation center P of the swivel base 2 by the width of the anti-cab 1
It is deviated to the 0 side.

The winch device 3 has two main hooks and two sub-hooks. Each of the winch devices 3 is provided on one side of the boom support plate 21 (the side opposite to the cab 10). Are located in Each of the winch devices 3 includes a hydraulic motor 4, a speed reducer 5, a drum 6, and a brake device 7. In the conventional winch mounting structure, the drum 6, the brake device 7, and the speed reducer 5 are arranged in this order from the side of the boom support plate 21 toward the outside of the vehicle, and then they are mounted on the winch mounting base 31. Assembled. The hydraulic motor 4 is arranged on the same side of the speed reducer 5 as the drum 6 and in parallel with the drum.

[0006] The space (width W from the outer surface of the boom support plate 21 to the outer end of the vehicle width) on the winch device mounting side on the vehicle body 1 is, as described above, the driver's cab 10
The width W is limited to be relatively small in order to secure the installation space of the drum 6, the brake device 7, and the speed reducer 5
Are slightly larger than their total length L when they are arranged coaxially. Therefore, when the winch device 3 is assembled with the drum 6 positioned closest to the boom support plate 21, it is necessary to install the winch device 3 such that the side plate 6 a of the drum 6 is close to the outer surface of the boom support plate 21. is there.

By the way, in a large wheel crane,
When a heavy load is carried out by the boom 11, a large reaction force (buckling force) acts on the boom pivoting portions of the boom support plates 21 and 21 at that time. Thus, the boom support plate 2
As a countermeasure against the buckling force acting on the boom support plates 21 and 21, it is conceivable to reinforce the boom support plates 21 and 21, but in that case, it is effective to increase the thickness of the boom support plate 21 in the thickness direction. When reinforcing the boom support plate 21,
Two side plates are juxtaposed or the boom support plate 2
1 can be made to have a thickness only at the upper end thereof, but the increased thickness is formed on the outer surface side of the boom support plate 21 (because the boom 11 is provided on the inner surface side of the boom support plate 21). , Cannot protrude).

[0008]

However, when the thickness is increased to reinforce the boom support plate 21 on the winch device mounting side, the space W on the winch device mounting side is reduced by the increased thickness. If the space required for installing the winch device 3 having the desired capacity (total length L) cannot be secured, the winch device 3 having a small overall length L (small winch capability) must be employed. . Further, in order to reinforce the boom support plate 21, only the upper end of the boom support plate 21 is thickened and installed so that the winch device 3 is located below the reinforcing portion (outwardly bulging portion). However, when the drum 6 is installed in a state where the drum 6 is located at the innermost side as in a conventional winch mounting structure, the reinforcing portion is covered on the drum 6 and is wound around the drum 6. Since the wire rope interferes with the reinforcing portion, there has been a problem that measures such as reducing the effective width of the drum 6 have to be taken.

In view of the above-mentioned problems of the conventional winch mounting structure, the present invention provides a winch for a wheel crane in which a winch device can be assembled without trouble even if a reinforcing portion is formed on a boom support plate. It is intended to provide a mounting structure.

[0010]

The present invention has the following structure as means for solving the above-mentioned problems.

According to a first aspect of the present invention, a pair of left and right boom support plates for supporting a boom so that the boom can be raised and lowered are erected on a swivel that is mounted on a vehicle body so as to be able to turn horizontally. The present invention is directed to a winch mounting structure in a wheel crane in which a winch device is arranged on an outer portion of a boom support plate.

The winch device includes a hydraulic motor, a speed reducer, and a drum, and is assembled in such a manner that the rotary shaft of the hydraulic motor and the rotary shaft of the drum are located in parallel on the same side of the speed reducer. .

At the upper end of the boom support plate on the side where the winch device is disposed, a reinforcing portion projecting outward is formed over a predetermined length range in the length direction of the boom support plate. This reinforcing portion may be formed by simply bending the upper end of the boom support plate outward, or by attaching another reinforcing member to the outer surface of the upper end of the boom support plate by welding or the like. The reinforcing portions may be formed on the left and right boom support plates in the same manner. However, the boom support plate on the side where the winch device is not mounted may be formed by another method (for example, the entire surface of the boom support plate is thickened). Or double).

In the winch mounting structure according to the first aspect of the present invention, the winch device is connected to the boom support plate on which the reinforcing portion is formed, and the speed reducer is attached to the boom support plate in a posture facing the boom support plate. It is mounted so that it is positioned lower and at least part of the reinforcing portion and the speed reducer overlap in plan view. The speed reducer of the winch device may be mounted in a state as close to (or in contact with) the outer surface of the boom support plate as possible below the reinforcing portion. Further, the width of the reinforcement or the vertical width thereof can be made as large as possible without impairing the attachment and function of the winch device. Further, in the winch mounting structure according to the first aspect, the winch device can be directly mounted on the outer surface of the boom support plate, or can be mounted on the winch support by mounting the winch support to the boom support plate. .

In the winch mounting structure according to the first aspect of the present invention, the space just below the reinforcing portion formed at the upper end of the boom support plate can be used as a space for installing the speed reducer of the winch device, and the outwardly extending reinforcing portion is provided on the boom support plate. Is formed, the entire winch device will fit within the outer end of the vehicle width. In addition, even when the reinforcing portion of the boom support plate is formed, the drum of the winch device does not overlap the reinforcing portion in the vehicle width direction in plan view,
The wire rope wound around the drum does not interfere with the reinforcing portion.

According to a second aspect of the present invention, in the winch mounting structure for a wheel crane according to the first aspect, the winch device is previously assembled into a winch mounting base to form a unit, and each winch unit is provided. It is configured to be detachably attached to the side of the boom support plate.

As described above, when the winch device is unitized in advance, the winch unit can be assembled together with the winch unit on the boom support plate side, and the winch device can be removed together with the winch unit during maintenance.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 1 to 4. The wheel crane of this embodiment has a swivel 2 mounted on a vehicle body 1, and the swivel 2 A driver's cab 10, a boom (telescopic boom) 11, and a winch device 3 are mounted thereon.

The swivel 2 has a pair of left and right boom support plates 2.
1 and 21 are erected. Each of the boom support plates 21 and
1 has a considerable length in the front-back direction. And
The base end of the boom 11 is pivotally connected between the boom support plates 21 and 21 by a shaft 13 at a position near the rear end.
The boom 11 is raised and lowered by an up-and-down cylinder 12 (a pair of left and right in the illustrated example).

The operator's cab 10 is mounted on the right side of the swivel 2 as viewed from the rear side of the vehicle body 1, and the winch device 3 is mounted on the left side of the swivel 2 as viewed from the rear side of the vehicle body 1. I have. In the following description, the term “right side” or “left side” refers to a state viewed from the rear side of the vehicle body 1.

As shown in FIG. 4, each of the left and right boom support plates 21 and 21 has one iron plate erected on the revolving base 2 at a slightly wider interval than the width of the boom 11.
As shown in FIG. 2, the boom support plates 21 and 21 are located at the center (center) between the boom support plates 21 and 21 in order to secure an installation space for the cab 10 on the right side of the swivel 2. The line Q) is slightly displaced to the left from the rotation center P of the swivel 2. Therefore, the space on the vehicle body 1 on the side where the winch device 3 is mounted (the width W from the outer surface of the left boom support plate 21 to the outer end of the vehicle width shown in FIG. 4) is relatively limited.

By the way, in a large wheel crane, if only one iron plate is erected as each of the boom support plates 21 and 21, there is an anxiety in terms of strength.
In the present application, reinforcing portions 22, 22 protruding outward are provided at the upper end portions of the boom support plates 21, 21.
Is formed over a considerably long range in the length direction. In this embodiment, as the reinforcing portions 22, 22, an outer bent portion 23 in which the upper ends of the boom support plates 21, 21 are respectively bent outward is formed, and an L-shaped cross section is formed below the outer bent portion 23. The reinforcing plate 24 is formed by welding. A cavity surrounded by a reinforcing plate 24 is formed below the outer bent portion 23. Thus, each boom support plate 21, 21
When the boom 11 is formed with the reinforcing portions 22, 22, even when the boom 11 performs a heavy load handling operation, the boom support plates 21, 21 are formed.
Sufficient strength can be secured.

A winch support 26 for mounting a winch unit 30, which will be described later, is attached to a lower portion of the outer surface of the left boom support plate 21 on which the winch device 3 is disposed. As shown in FIGS. 3 and 4, the winch support 26 has two front and rear spaces with an interval therebetween.
With the respective winch supports 26, 26 oriented in the vehicle width direction, their respective base ends are welded to the outer surface of the boom support plate 21.

The winch device 3 has a hydraulic motor 4, a speed reducer 5, a drum 6, and a brake device 7. In this embodiment, two winch devices 3 are used for main winding and auxiliary winding. And each of the winch devices 3, 3
Is a method of assembling the hydraulic motor 4, the drum 6, and the reduction gear 5 in advance with the rotation axis of the hydraulic motor 4 and the rotation axis of the drum 6 being positioned in parallel on the same side of the reduction gear 5. The device 7 is separately assembled to the drum 6.

Each of the winch units 3 and 3 is assembled on a single winch mount 31 in advance to form a winch unit 30. The winch mount 31 is formed in a substantially box shape by a bottom plate 32, left and right side plates 33, 33, a front plate 34, and a rear plate 35. In each of the left and right side plates 33, 33, two holes 36 for penetrating the two drums 6, 6 are formed front and rear. As shown in FIG. 3, the bottom plate 32 of the winch mount 31 is positioned such that the drums 6, 6 correspond to the holes 36, 36, and the hydraulic motors 4, 4 are positioned on the lower side of the bottom plate 32. It has been transformed to do.

The winch devices 3 and 3 are assembled to the winch mount 31 as follows. That is, the winch devices 3, 3 are assembled with the hydraulic motor 4, the speed reducer 5, and the drum 6 (with the brake device 7 removed) and the drums 6, 6 are attached to the winch mount 3
1 is inserted from the outside of the right side plate 33 into the holes 36, 36, and a plurality of outer end portions of the respective speed reducers 5, 5 are bolted to the outer surface of the right side plate 33 (reference numeral 37 in FIG. 3). The brake device 7 is attached to the left end (projecting outward from the left side plate 33) of 6 to be integrated. In the installed state of the winch device, as shown in FIG. 4, each of the speed reducers 5 and 5 protrudes outward (to the right) from the right side plate 33. A sheave block 61 for winding the wire ropes 60 wound around the drums 6 is attached to the upper portion of the winch mount 31.

The winch unit 30 integrated in this way is placed on the winch supports 26, 26 together with the winch unit 30, as shown in FIGS. 32 is fastened to each of the winch supports 26, 26 with bolts 38 (four in total), and the front end and the rear end of the right side plate 33 of the winch mounting base 31 are each bolted with left and right booms 39 (six in total). It is fastened to the support plate 21 and assembled. In the winch mounting structure of this embodiment, the cover 8 is mounted on the outside of the winch unit 30 after the winch unit 30 is mounted on the side of the boom support plate 21. The winch unit 30 can be lowered from the winch supports 26, 26 without removing the bolts 38, 39 from the assembled state.

In the assembled state of the winch unit 30, each of the speed reducers 5 and 5 is connected to the reinforcing portion 2 of the left boom support plate 21.
Below, the reinforcing portion 22 and the portion near the right end of each of the speed reducers 5 and 5 overlap in plan view. That is, the reinforcing portion 22
And each speed reducer 5 overlap in the vehicle width direction in the range of the symbol M in FIG. In the assembled state of the winch unit 30, the entire width of the drum 6 is located outside the outer end of the reinforcing portion 22 of the boom support plate 21.

As described above, when the winch devices 3, 3 are assembled in a state where the reinforcing portion 22 of the left boom support plate 21 and the speed reducer 5 overlap in the vehicle width direction (overlap width M) in plan view, The space immediately below the reinforcing portion 22 of the boom support plate 21 can be used as a space for installing the speed reducer 5 of the winch device 3. Accordingly, even when the boom support plate 21 is formed with the reinforcing portion 22 protruding outward, the entire winch device 3 can be accommodated in the outer end of the vehicle width. Further, even when the reinforcing portion 22 is formed at the upper end of the boom support plate 21, the drum 6 of each of the winch devices 3 is viewed in a plan view.
Does not overlap with the reinforcing portion 22 in the vehicle width direction, so that the wire rope 60 wound around the drum 22 does not interfere with the reinforcing portion 22.

If each of the winch devices 3, 3 is previously assembled on the winch mounting base 31 to form a unit, the winch unit 30 can be installed together with the winch unit 30 on the side of the boom support plate 21. Can be easily performed and the winch unit 30 can be removed together with the winch unit 30 during maintenance, so that maintenance work can be performed in a wide place.

[0031]

The winch mounting structure for the wheel crane according to the present invention has the following effects.

[0032] In the winch mounting structure effects present a first aspect of the present invention according to claim 1, winch device 3
At the upper end of the boom support plate 21 on the side where is disposed, a reinforcing portion 22 having a shape protruding outward is formed over a predetermined length range in the length direction of the boom support plate 21 and the winch device 3 is mounted. Boom support plate 21 formed with the reinforcing portion 22
On the other hand, the speed reducer 5 is positioned below the reinforcing portion 22 with the speed reducer 5 facing the boom support plate 21 and at least a part of the reinforcing portion 22 and the speed reducer 5 overlap in a plan view. It is installed as follows. Therefore, in the assembled state of the winch device 3, the reinforcing portion 2 of the boom support plate 21
2 can be effectively used as a space for installing the speed reducer 5 of the winch device 3. Even if the boom support plate 21 is formed with the reinforcing portion 22 protruding outward, the winch of the desired capacity (overall length L) can be obtained. There is an effect that the device 3 can be placed and installed in the outer end of the vehicle width. In addition, even when the reinforcing portion 22 is formed at the upper end of the boom support plate 21, the drum 6 of the winch device 3 does not overlap with the reinforcing portion 22 in plan view. There is an effect that the wire rope 60 wound around does not interfere with the reinforcing portion 22.

According to the second aspect of the present invention, in the winch mounting structure of the first aspect, the winch device 3 is mounted on the winch mounting base 31 to form a unit, and the winch unit 30 and the boom support plate 21 are unitized. It is detachably attached to the side of. Therefore,
When the winch device is assembled, the winch unit 30
Can be installed on the side of the boom support plate 21, so that the assembly work can be performed easily. Also, the maintenance work of the winch device 3 can be performed in a wide place by removing the winch unit 30. This has the effect of becoming

[Brief description of the drawings]

FIG. 1 is a side view of a wheel crane provided with a winch mounting structure according to an embodiment of the present application.

FIG. 2 is a partial plan view of FIG.

FIG. 3 is an enlarged sectional view taken along the line III-III of FIG. 2;

FIG. 4 is an enlarged sectional view taken along the line IV-IV of FIG. 2;

FIG. 5 is a partial plan view of a wheel crane provided with a conventional winch mounting structure.

FIG. 6 is an enlarged sectional view taken along the line VI-VI of FIG. 5;

[Explanation of symbols]

1 is a vehicle body, 2 is a turntable, 3 is a winch device, 4 is a hydraulic motor, 5 is a speed reducer, 6 is a drum, 7 is a brake device, 1
1 is a boom, 21 is a boom support plate, 22 is a reinforcing part, 30
Is a winch unit, and 31 is a winch mount.

Claims (2)

[Claims] 1. A pair of left and right boom support plates (21, 21) for vertically supporting a boom (11) on a swivel (2) mounted on a vehicle body (1) so as to be horizontally swingable. A hydraulic motor (4), a speed reducer (5), and a drum (6), and a rotation axis of the hydraulic motor (4) and a rotation axis of the drum (6) are parallel on the same side of the speed reducer (5). In a wheel crane in which the winch device (3) assembled in a state where the winch device (3) is disposed is located outside the one boom support plate (21), the boom support plate (2) on the side where the winch device (3) is disposed
A reinforcing portion (22) having a shape protruding outward at the upper end of (1).
Is formed over a predetermined length range in the length direction of the boom support plate (21), and the winch device (3) is moved with respect to the boom support plate (21) on which the reinforcing portion (22) is formed. , The reduction gear (5)
The reduction gear (5) is positioned below the reinforcement part (22) in a posture facing the boom support plate (21), and at least one of the reinforcement part (22) and the reduction gear (5) in plan view. A winch mounting structure for a wheel crane, wherein the winch is mounted so that the parts overlap. 2. The winch device (3) according to claim 1, wherein
A winch in a wheel crane characterized in that the winch unit (30) is preliminarily assembled into a unit, and the winch unit (30) is removably assembled to the side of the boom support plate (21). Mounting structure.