JP3986694B2 - Auxiliary wheel device for mobile work machines - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an auxiliary wheel device for a mobile work machine.
[0002]
[Prior art]
In a mobile work machine, especially a mobile work machine with a heavy equipment mounted on a vehicle such as a super-large crane truck, the wheel load applied to each of the traveling wheels of the vehicle is extremely large. Usually, the vehicle and the crane apparatus mounted on the vehicle are separated and moved individually. However, when the work position (crane vehicle installation position) is changed in the premises work, the work efficiency is remarkably impaired if the vehicle and the crane apparatus are separated each time. Therefore, when the work position is changed in the premises work, auxiliary wheels are attached to the vehicle, and the weight on each of the traveling wheels is reduced due to the weight burden of the auxiliary wheels, so that the vehicle and the crane are not separated from each other. Is moved in the integrated form (see, for example, JP-A-7-315118).
[0003]
[Problems to be solved by the invention]
However, in the conventional auxiliary wheel device such as the above-mentioned known example, a telescopic beam is fixed to the side portion of the vehicle so as to be able to advance and retreat in the vehicle width direction from the side portion, and a jack cylinder is attached to the tip of the beam. Since the auxiliary wheel device is attached, when the auxiliary wheel device is attached / detached, the work of attaching / detaching the beam to / from the vehicle and the operation of attaching / detaching the auxiliary wheel device to / from the beam are required, which is extremely complicated. . Further, since it is necessary to use a dedicated member such as the beam for mounting the auxiliary wheel device, there is a problem that the number of members of the auxiliary wheel device as a whole is large and the cost is increased.
[0004]
Furthermore, since the auxiliary wheel in the conventional auxiliary wheel device has a structure in which the traveling direction is fixed only in the vehicle length direction of the vehicle and cannot be steered, the crane vehicle is moved on the premises with the auxiliary wheel device mounted. However, there is also a problem that the movement range when the auxiliary wheel device is mounted is limited, and the mobility, which is the greatest feature of the crane truck, cannot be fully exhibited.
[0005]
Accordingly, the present invention has been made with the object of providing a low-cost auxiliary wheel device that can be easily and quickly attached and detached and can maintain the mobility of the work machine in a mobile work machine such as a super large crane vehicle. It is a thing.
[0006]
[Means for Solving the Problems]
In the present invention, the following configuration is adopted as a specific means for solving such a problem.
[0007]
In the first invention of the present application, a telescopic girder that is capable of traveling by traveling wheels and that is movable forward and backward in a direction substantially orthogonal to the traveling direction of the traveling base is mounted on a traveling base. And an auxiliary wheel device used in a mobile work machine configured by arranging an outrigger device comprising a cylinder mechanism provided at the distal end portion of the telescopic girder and attached to the telescopic girder of the outrigger device. A mechanism, a bracket member attached to the support mechanism via a turning mechanism, and extending in a direction substantially perpendicular to the turning axis of the turning mechanism and viewed from the turning axis direction with respect to the turning axis It is characterized by comprising an auxiliary wheel rotatably supported on the bracket member via an axle that is deviated in the radial direction of the turning mechanism.
[0008]
According to a second invention of the present application, in the auxiliary wheel device for a mobile work machine according to the first invention, the support mechanism is connected in an openable / closable manner, and in the opened state, the telescopic girder passes from the opening side. On the other hand, in the closed state, a pair of left and right holding members that hold the telescopic girder from both sides in the width direction and are fixed thereto, and a pair of holding members on each of the pair of holding members. A pair of left and right swing arms connected to the swing end along the plane parallel to the opening and closing direction and to which the auxiliary wheel is attached via the turning mechanism and the bracket member on the swing end side, and the pair of left and right And a driving means that swings the pair of left and right swing arms synchronously in a state where the pair of left and right holding members are set in a closed state. It is characterized by that.
[0009]
【The invention's effect】
In the present invention, the following effects can be obtained by adopting such a configuration.
[0010]
(1) An auxiliary wheel device for a mobile work machine according to the first invention of the present application includes a support mechanism for detachably attaching the auxiliary wheel device to an extendable girder of an outrigger device provided on a traveling base; A bracket member attached to the support mechanism via a turning mechanism, and extends in a direction substantially perpendicular to the turning axis of the turning mechanism, and the turning mechanism with respect to the turning axis when viewed from the turning axis direction. And an auxiliary wheel rotatably supported by the bracket member via an axle disposed in a deviated radial direction.
[0011]
Therefore, according to the auxiliary wheel device of the mobile work machine of the present invention,
(A) Since the auxiliary wheel device is mounted on the traveling base using the outrigger device provided on the traveling base, for example, the conventional auxiliary wheel device is dedicated for mounting the auxiliary wheel device. Compared to the structure in which the member is provided, the structure of the entire auxiliary wheel device is simplified and the number of members is reduced, and the auxiliary wheel device can be provided at a lower cost.
(B) Since the turning axis of the turning mechanism and the axle supporting the auxiliary wheel are displaced in the radial direction of the turning mechanism as seen from the direction of the turning axis, the auxiliary wheel has a caster function. As a result, the auxiliary wheel is steered to follow the steering direction of the traveling base, and the traveling traveling property of the traveling base with the auxiliary wheel device attached is ensured. Mobility is maintained, and by extension of the movable area, work efficiency can be expected to improve.
Etc. are obtained.
[0012]
(2) In the second invention of the present application, in addition to the effects described in (1) above, the following specific effects can be obtained. That is, in the present invention, the support mechanism for supporting the auxiliary wheel to the telescopic girder mounted on the outrigger is connected to be freely opened and closed, and in the open state, the passage of the telescopic girder is allowed from the opening side, In the closed state, a pair of left and right holding members that hold the telescopic girder from both sides in the width direction and are fixed thereto, and each of the pair of holding members is parallel to the opening and closing direction of the holding member A pair of left and right swing arms to which the auxiliary wheel is attached via the swing mechanism and the bracket member, and a pair of left and right swing arms. Since it is composed of driving means that swings in synchronization with the pair of left and right swing arms in a state where the pair of left and right holding members are set in a closed state,
(A) The auxiliary wheel device can be easily and quickly attached to and detached from the telescopic girder of the outrigger device by opening and closing the pair of left and right holding members. Compared to the case where a member such as a beam is required to be attached / detached, the attaching / detaching operation of the auxiliary wheel device to / from the traveling base can be simplified and speeded up, thereby improving the work efficiency of the mobile work machine. Can also contribute,
(B) With the pair of left and right holding members closed, and with the support mechanism attached to the telescopic girder of the outrigger device of the traveling base, the pair of left and right swing arms is synchronized with the driving means as appropriate. By swinging, the height in the vertical direction of the auxiliary wheel provided at the swinging ends of the pair of left and right swing arms is adjusted with respect to the traveling base. The relative relationship with the wheel load applied to the traveling wheel on the traveling base side can be easily made into an appropriate state, and thus the safety when the mobile work machine is moved with the auxiliary wheel device mounted, and Reliability is improved,
Etc. are obtained.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an auxiliary wheel device for a mobile work machine according to the present invention will be described in detail based on preferred embodiments.
[0014]
1 and 2 show a super large crane vehicle Z as an example of a mobile work machine including the auxiliary wheel device X according to the present invention. This crane vehicle Z is swung through a swivel seat 4 on a loading platform 2 of a vehicle 1 (corresponding to a “traveling base” in the claims) having a large number of traveling wheels 3, 3,. A crane device Y (corresponding to the “working device” in the claims) having the telescopic boom 5 attached to the platform 6 is pivotably attached, and a pair of left and right fronts are mounted at positions close to the front of the vehicle body of the loading platform 2 The side outrigger devices 8 and 8 are attached to the rear portion of the vehicle body, and a pair of left and right rear outrigger devices 9 and 9 are respectively attached in the vehicle width direction. Each of the outrigger devices 8, 8, 9, 9 has the same structure, and is a base end girder 51 fixedly arranged on the cargo bed 2 side and an intermediate portion inserted in the base end girder 51. A telescopic girder 50 including a girder 52 and a front end girder 53 inserted in the intermediate girder 52 is provided, and a cylinder mechanism 49 is attached to the front end portion of the front end girder 53 in the vertical direction. A ground plate 48 is connected to the lower end of each.
[0015]
In this crane vehicle Z, since it is very large and heavy, when moving through public roads, the vehicle 1 and the crane device Y are separated and moved separately. As described above, when the installation location is moved on the premises in consideration of workability and the like, it is customary to move the vehicle 1 with the crane device Y mounted in an operating state. (In this case, each of the outrigger devices 8 and 9 is in an overhanging state where the telescopic girder 50 is extended, and the cylinder mechanism 49 is contracted so that the ground plate 48 is appropriately separated from the ground. ) However, when the crane vehicle Z is moved in its operating state as described above, an excessive wheel load is applied to each of the traveling wheels 3, 3,. As described above, the reliability may be impaired. Therefore, in the crane vehicle Z of this embodiment, the pair of left and right front outrigger devices 8, 8 of the vehicle 1, the pair of left and right rear outrigger devices 9, 9, or the pair of left and right front outrigger devices 8, 8 and the rear-side outrigger devices 9 and 9 are each equipped with an auxiliary wheel device X described below, and the traveling wheels 3, 3,. The wheel load is optimized to ensure reliability when moving. Hereinafter, the structure and function of the auxiliary wheel device X will be described based on FIGS. 3 to 5 by taking as an example the case where the pair of left and right front-side outrigger devices 8 and 8 (the distal beam 53 portion) is mounted. Explained.
[0016]
As shown in FIGS. 3 and 4, the auxiliary wheel device X is detachably attached to the front-side outrigger devices 8, 8 provided on the vehicle 1 side. 11 supports a plurality of (four in this embodiment) auxiliary wheels 16, 16,.
[0017]
As described above, the support mechanism 11 supports the auxiliary wheels 16, 16,... On the telescopic beam 50 side of the front-side outrigger device 8, and includes a pair of left and right holding members 12, 12 and left and right. A pair of swing arms 13 and 13 and a hydraulic cylinder 14 (corresponding to “driving means” in the claims) are configured.
[0018]
The holding member 12 is configured by opposing a pair of plate members having a length larger by a predetermined dimension than the height dimension of the distal end girder 53 of the telescopic girder 50 at a predetermined interval and integrating them. In addition, a contact plate 23 is provided on the inner side, and a protrusion 22 protruding from the contact plate 23 to a predetermined height is attached to the contact plate 23. This holding member 12 is used by a pair of left and right, and each of these holding members 12 and 12 is formed in the opposite direction. The pair of left and right holding members 12 and 12 are connected so that one end portions 12a and 12a thereof can be relatively displaced by a straight connecting member 21 via fulcrum pins 31 and 31, respectively. The other end portions 12 b and 12 b provided with the projections 23 and the protrusions 22 can be fastened and unfastened by fastening bolts 34.
[0019]
As shown in FIG. 3, the pair of left and right holding members 12 and 12 includes the connecting member 21 provided on the one end 12a and 12a side and the protrusion 22 provided on the other end 12b and 12b side. , 22 and a “closed state” in which a rectangular space is formed between them, and as shown in FIG. 5, the pair of holding members 12, 12 are inclined outward from both ends of the connecting member 21. It is possible to select the “open state” drawn out by.
[0020]
In the “closed state” shown in FIG. 3, the distal end girder 53 of the telescopic girder 50 is located inside the pair of holding members 12, 12, and the connecting member 21 is placed on the upper surface of the front end girder 53. The pair of holding members 12 and 12 are opposed to both side surfaces of the distal end girder 53, and the pair of protrusions 22 and 22 are opposed to the lower surface of the distal end girder 53. In this state, the other end portions 12b, 12b of the pair of holding members 12, 12 are fastened by the fastening bolts 34, so that the pair of holding members 12, 12 are fixed to the distal end girder 53 side. (In other words, the auxiliary wheel device X as a whole is fixed to the tip beam 53 side).
[0021]
As shown in FIG. 4, a pair of left and right clamp mechanisms 19, 19 are provided on one side of the connecting member 21, and the pair of left and right holding members 12, 12 are in the “closed state” and the tip In the state fixed to the girder 53, the pair of clamp mechanisms 19, 19 are clamped to a flange portion 52a provided at the outer end of the intermediate girder 52, and the pair of left and right holding members 12, 12 (extended Is designed to regulate the displacement of the auxiliary wheel device X as a whole in the direction of the telescopic beam axis.
[0022]
Further, when the pair of left and right holding members 12, 12 are set in the “open state” shown in FIG. 5, the width dimension of the opening portion is larger than the width dimension of the distal end girder 53 by a predetermined dimension. Accordingly, in the “open state”, the distal end girder 53 can be inserted through the opening.
[0023]
The swing arm 13 is a member having a substantially “H” -shaped side surface, and one end 13 a of the swing arm 13 is rotatable relative to the middle step in the length direction of the holding member 12 via a fulcrum pin 32. It is connected. The swing arm 13 is used as a pair on the left and right sides, and is manufactured independently of each other, and its one end 13a, 13a is connected to the pair of left and right holding members 12, 12, respectively. . In addition, the pair of left and right swing arms 13 and 13 are connected to each other by the hydraulic cylinder 14 via fulcrum pins 33 and 33 between the middle step portions 13c and 13c in the length direction. Accordingly, each of the swing arms 13 and 13 is in a state in which the positions of the one ends 13a and 13a are fixed (specifically, the holding members 12 and 12 are in the “closed state” and are moved toward the distal end spar 53. In the fixed state), the hydraulic cylinder 14 is swung in a synchronized state around the fulcrum pins 32 and 32 by the expansion and contraction of the hydraulic cylinder 14.
[0024]
A bracket member 15 is connected to the other ends 13 b and 13 b of the swing arms 13 and 13 via the turning mechanism 10. The bracket member 15 is mounted with a pair of left and right auxiliary wheels 16 and 16 via an axle 20 disposed in a direction orthogonal to the turning axis of the turning mechanism 10. In this case, as shown in FIG. 3, the turning axis of the turning mechanism 10 and the axle 20 are displaced by a dimension S in the radial direction of the turning mechanism 10 when viewed from the axial direction of the turning axis. Yes. Therefore, when the auxiliary wheel 16 is grounded and a running resistance is applied thereto, the axle 20 is positioned on the opposite side of the running direction with respect to the turning axis by receiving the running resistance. The wheel 16 always rolls in the traveling direction (a so-called “caster function”).
[0025]
The turning mechanism 10 is provided with a lock mechanism 18 for fixing and holding the bracket member 15 (that is, the auxiliary wheels 16 and 16) at a predetermined turning position with respect to the swing arm 13. . A suspension hook 24 for suspension work of the auxiliary wheel device X is provided on the other end 13b side of the swing arm 13. Further, an accumulator 17 for accumulating hydraulic oil supplied to the hydraulic cylinder 14 is disposed on the side surface of the swing arm 13.
[0026]
The above is the specific structure of the auxiliary wheel device X.
Subsequently, an operation of mounting the auxiliary wheel device X will be described.
Attaching / detaching the auxiliary wheel device X The attaching / detaching of the auxiliary wheel device X to / from the vehicle 1 is performed using another crane device or the like.
[0027]
When mounting the auxiliary wheel device X, first, the front-side outrigger devices 8 and 8 and the rear-side outrigger devices 9 and 9 are projected together to support the vehicle 1 in a floating state. Thereafter, the operation of moving the auxiliary wheel device X placed on the ground is started. That is, first, the fastening bolt 34 provided between the pair of left and right holding members 12 and 12 is removed, and in this state, the other ends 13b and 13b of the pair of left and right swing arms 13 and 13 are respectively attached. Lifting wires 25 and 25 are attached to the provided suspension hooks 24 and 24, respectively, and the auxiliary wheel device X is lifted by attaching the other crane using the lifting wires 25 and 25. Then, since the weight of the support mechanism 11 is applied to both end portions thereof, as shown in FIG. 5, the center portion hangs down and the pair of left and right holding members 12 and 12 are in the “open state”. Accordingly, the auxiliary wheel device X is moved to the position just above the front-side outrigger device 8 of the vehicle 1 in this suspended state, and then gradually lowered to hold the pair of left and right arms in the “open state”. The holding members 12 and 12 are fitted from the opening portion to the front end beam 53 portion of the front side outrigger device 8 from above. When the connecting member 21 comes into contact with the upper surface of the tip girder 53 due to the descent of the auxiliary wheel device X, further descent is restricted, so that the lifting wires 25, 25 are loosened and the pair of left and right The holding members 12, 12 swing around the fulcrum pins 31, 31 on the one end 12 a, 12 a side so as to gradually approach the side surface of the tip beam 53, and the pair of left and right swing arms 13, 13 and these The auxiliary wheels 16, 16 provided respectively on the swinging arms 13, 13 gradually turn downward about the fulcrum pins 32, 32 on the one end 13 a, 13 a side of the swing arms 13, 13. As shown by the above, the pair of left and right holding members 12 and 12 are stopped in a state where they are abutted against the side face of the distal end girder 53. Therefore, after the stop, the pair of left and right holding members 12, 12 are fastened together by the fastening bolt 34, and the pair of left and right holding members 12, 12 are fixed to the distal end girder 53, thereby the auxiliary wheel device X. Is completed on the front-side outrigger device 8 side (at this time, the clamping operation of the clamping mechanism 19 is also performed).
[0028]
When the auxiliary wheel device X is completely attached, as shown in FIG. 3, the contact plates 23 and 23 and the protrusions 22 and 22 provided on the pair of left and right holding members 12 and 12 are connected to the tip. The lower end corners of the girder 53 are in close contact with each other, and the load applied to the auxiliary wheel device X through the front-side outrigger device 8 is supported by this portion.
[0029]
When the operation of attaching the auxiliary wheel device X to the front-side outrigger device 8 is completed, the hydraulic cylinder 14 is then expanded and contracted appropriately to increase the height of the auxiliary wheels 16, 16,. Adjust the dimensions. Thereafter, the cylinder mechanism 49 of the front-side outrigger devices 8, 8 and the rear-side outrigger devices 9, 9 is contracted to lower the vehicle 1 in a floating state, and each of the traveling wheels 3, 3,. Ground. At this time, the traveling wheels 3, 3,... Are grounded together with the auxiliary wheels 16, 16,..., And the traveling wheels 3, 3,. In this case, the weight of each auxiliary wheel 16, 16,... Is inappropriate for the weight of the traveling wheel 3, 3,. Therefore, traveling performance or reliability is not sufficiently ensured. Therefore, by adjusting the height position of each auxiliary wheel 16, 16,... Plan
[0030]
In addition, the removal operation | work of the said auxiliary wheel apparatus X from the said front side outrigger apparatus 8 after completion | finish of a movement operation | work is performed in the reverse procedure to the said attachment operation | work, and description here is abbreviate | omitted.
[Brief description of the drawings]
FIG. 1 is a side view of a crane truck provided with an auxiliary wheel device according to the present invention.
FIG. 2 is a view taken in the direction of arrows II-II in FIG.
FIG. 3 is an enlarged view of the auxiliary wheel device according to the present invention shown in FIG. 1;
4 is a view taken along arrow IV-IV in FIG. 3;
FIG. 5 is a side view showing a state when the auxiliary wheel device according to the present invention is attached or detached.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 is a vehicle, 2 is a loading platform, 3 is a traveling wheel, 4 is a turning seat, 5 is a telescopic boom, 6 is a turning platform, 8 is a front side outrigger device, 9 is a rear side outrigger device, 10 is a turning mechanism, 11 is a support Mechanism, 12 is a holding member, 13 is a swing arm, 14 is a hydraulic cylinder, 15 is a bracket member, 16 is an auxiliary wheel, 17 is an accumulator, 18 is a lock mechanism, 19 is a clamp mechanism, 20 is an axle, and 21 is a connection Material, 22 is a protrusion, 23 is a contact plate, 24 is a hanging hook, 25 is a lifting wire, 31 to 33 are fulcrum pins, 34 is a fastening bolt, 48 is a grounding plate, 49 is a cylinder mechanism, 50 is a telescopic girder , 51 is a base beam, 52 is an intermediate beam, 53 is a front beam, X is an auxiliary wheel device, Y is a crane device, and Z is a crane vehicle.

Claims (2)

A traveling base that can be traveled by a traveling wheel and on which an appropriate working device is mounted is provided on an extendable girder that is movable forward and backward in a direction substantially perpendicular to the traveling direction of the traveling base, and a distal end portion of the telescopic girder An auxiliary wheel device used for a mobile work machine configured by arranging an outrigger device comprising a provided cylinder mechanism,
A support mechanism detachably attached to the telescopic girder of the outrigger device;
A bracket member attached to the support mechanism via a turning mechanism;
The bracket member via an axle that extends in a direction substantially orthogonal to the turning axis of the turning mechanism and is offset in the radial direction of the turning mechanism with respect to the turning axis when viewed from the turning axis direction. An auxiliary wheel device for a mobile work machine, characterized in that the auxiliary wheel device is provided with an auxiliary wheel that is rotatably supported by the motor. In claim 1,
The support mechanism is openably and closably connected and allows the telescopic girder to pass from the opening side in the open state, while holding the telescopic girder from both sides in the width direction in the closed state. A pair of left and right holding members to be fixed;
Each of the pair of holding members is swingably connected along a plane parallel to the opening / closing direction of the holding member, and the auxiliary wheel is connected to the swing end side via the turning mechanism and the bracket member. A pair of left and right swing arms to which
Driving means arranged to straddle between the pair of left and right swing arms and to swing the pair of left and right swing arms synchronously in a state where the pair of left and right holding members are set in a closed state. An auxiliary wheel device for a mobile work machine, comprising:

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