JP2004123360A - Counterweight device of working vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce the distance from a turning center to a turning member at a rearmost end by solving a problem wherein the occupied area in the turning work is increased by the distance from a rear end of a turntable (3) to a rear end of a counterweight (19) because the counterweight (19) of a working vehicle is brought into contact with a rear end of a portion protruded backward of a rear end of a turning bearing of the turntable (3) and fitted to the backward side of the rear end. <P>SOLUTION: In a counterweight device of a working vehicle, a counterweight 6a is fitted to a side surface on an outer surface side of a plate member 3b on the forward side of a rear end of a turntable 3. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
According to the present invention, a pair of plate-like members which are attached to a base of a vehicle via a swing bearing so as to be able to swing freely and project parallel to the rear of the swing bearing from the rear end of the swing bearing, and can be freely raised and lowered at the rear end of the swing base. The present invention relates to a counterweight device for a work vehicle having a boom supporting a base end thereof, and an up-and-down cylinder connected between a proper position of a swivel table and a proper position of the boom.
[0002]
[Prior art]
A conventional counterweight device for a working vehicle is disclosed in Japanese Patent Publication No. 52-24727.
[0003]
In this counterweight device, a swivel (3) is mounted on a base of a work vehicle (mobile crane) (1) via a swivel bearing so as to be swivelable. The swivel base (3) has a portion protruding rearward from the rear end of the swivel bearing.
[0004]
The boom (6) is extendable and contractable, and supports (5) the base end portion so as to be able to undulate and rise at the base rear end of the swivel (3). The up-and-down cylinder (8) is connected between an appropriate position at the front end of the swivel base (3) and an appropriate position at the base end boom (6a) of the boom (6), and drives the boom (6) so as to be able to undulate.
[0005]
The swivel (3) has a counterweight attachment / detachment device (including an arm (16)) attached to the rear end of the protruding portion. After the counterweight (19) is pulled up to a predetermined position at the time of mounting by the counterweight attaching / detaching device, the counterweight (19) is moved to the swivel (3) by the pin (23) of the arm (16) supporting the upper part of the counterweight (19). The counterweight (19) is fixedly attached to the swivel (3) by fixing and fixing the counterweight (19) to the lower swivel (3) by the connecting device (25). With this configuration, the counterweight (19) has its front end in contact with the rear end of the swivel base and is mounted further rearward than this rear end.
[0006]
The counterweight attached in this manner acts on the work vehicle as a reversing moment during work, and is therefore convenient for work stability.
[0007]
[Patent Document]
JP-B-52-24727 [0008]
[Problems to be solved by the invention]
By the way, the work vehicle (1) turns around the turning center (radial center of the turning bearing) in the work, but the distance to the rear end of the counterweight (19) fixed to the turning table (3) turns. If it is longer from the center, the occupied area at the time of turning operation becomes larger. This requires a large work space for the work vehicle (1) at the work site, and reduces the space for work other than the work vehicle (1). For this reason, there has been a problem that the work efficiency of the entire work site may be reduced.
[0009]
SUMMARY OF THE INVENTION It is an object of the present invention to provide a configuration of a counterweight device for a work vehicle that reduces a distance from a turning center to a rearmost member that turns.
[0010]
[Means for Solving the Problems]
In order to solve the above problems, a counterweight device for a work vehicle according to the present invention is configured as follows.
[0011]
According to claim 1 of the present invention, the counterweight device of the working vehicle is mounted on the base of the vehicle via a slewing bearing so as to be pivotable, and a pair of right and left protruding portions from the rear end of the base rearward from the rear end of the slewing bearing. A work vehicle having a plate-like projecting swivel, a boom supporting the base end of the swivel at the rear end thereof so as to be able to be raised and lowered, and an up-and-down cylinder connected between the right place of the swivel and the right place of the boom. Wherein the counterweight is attached to a front side of a rear end of the swivel base and to a side surface on an outer surface side of the protruding portion.
[0012]
With this configuration, the member at the rearmost end from the turning center is a member at the rear end of the swivel. The distance from the turning center to the rearmost member can be reduced by the thickness of the counterweight in the front-rear direction.
[0013]
According to claim 2 of the present invention, the counterweight device of the work vehicle is pivotally mounted on the base of the vehicle via a slewing bearing, and its base is attached to the base of the vehicle. A work vehicle having a plate-like projecting swivel, a boom supporting the base end of the swivel at the rear end thereof so as to be able to be raised and lowered, and an up-and-down cylinder connected between the right place of the swivel and the right place of the boom. Wherein the counterweight is attached to a space inside the swivel base between a plane connecting the left and right lower ends of the protruding portion and the lower surface of the stored boom.
[0014]
With such a configuration, in addition to the effect of the first aspect, the counterweight does not protrude in the width direction from the plate-shaped member, so that the turntable including the counterweight can be downsized in the width direction.
[0015]
According to a third aspect of the present invention, the swivel base of the counterweight device for a work vehicle according to the first or second aspect is configured such that a base is raised in a columnar shape on the swivel bearing and a protruding portion is provided rearward from a rear end of the swivel bearing near an upper end. And a pair of left and right plate-like projections.
[0016]
With such a configuration, the effect according to claim 1 or 2 can be applied to a work vehicle having a tall structure near the swivel.
[0017]
According to a fourth aspect of the present invention, the up / down cylinder of the counterweight device for a work vehicle according to the second or third aspect is mounted along a lower surface of the boom, and the counterweight is mounted on a swivel-side up / down cylinder mounting bracket. Alternatively, the boom-side up / down cylinder mounting bracket is mounted in a space inside the swivel base between the rear end of the rear bracket and the rear end of the swivel base.
[0018]
With this configuration, in addition to the effects of the second and third aspects, the counterweight can be arranged so as to most effectively give the reversing moment of the space in the swivel base.
[0019]
According to a fifth aspect of the present invention, the counterweight of the counterweight device for a work vehicle according to the second, third or fourth aspect is configured such that the counterweight overlaps at least a part with the undulating cylinder in a side view or a plan view. It was constructed by attaching to the inner space.
[0020]
With such a configuration, in addition to the effects of the second, third, or fourth aspect, even when the counterweight is additionally provided, the space inside the swivel table at the position acting as the reversing moment can be used.
[0021]
BEST MODE FOR CARRYING OUT THE INVENTION
A first embodiment of a counterweight device for a work vehicle according to the present invention will be described with reference to FIGS.
[0022]
1 is a base, 2 is a swivel bearing, 3 is a swivel base, 3a is a swivel base, 3b is a plate member of the swivel base, 3c is a rear end member of the swivel base, and 4 is a boom. , 4a is a base end boom, 5 is an up-and-down cylinder, 6, 6a are counterweights, A is a vehicle, and CL is a turning center.
[0023]
The swivel 3 is attached to the base 1 of the vehicle A via a swivel bearing 2 so as to be swivelable. The swivel base 3 has a swivel base 3 a fixed to the swivel bearing 2, and a pair of left and right parallel plate-like members 3 b projecting rearward from the rear end of the swivel bearing 2 from the rear end of the swivel base 3 a. The rear ends of the pair of plate members 3b, 3b are connected by a rear end member 3c located in the left-right direction.
[0024]
The swivel base 3 supports the base end of a base end boom 4a of the boom 4 which is telescopic at the rear end so as to be able to rise and fall. The up-and-down cylinder 5 is connected between an appropriate position of the swivel base 3 and an appropriate position of the base end boom 4a, and drives the boom 4 so that the boom 4 can be raised and lowered.
[0025]
It is preferable that the rear end of the counterweight 6a enters the inside of an arc C1 having a radius R1 passing through the rear end of the swivel 3 centering on the center of the swivel 3 (radial center of the swivel bearing) CL. ) Is attached to the outer side surface 3b1 of the plate-like member 3b by welding. Other mounting methods such as bolts may be used.
[0026]
With this configuration, the rearmost member from the turning center CL is the rear end member 3c of the turning table. The distance from the turning center CL to the rearmost member can be reduced by the thickness of the counterweight in the front-rear direction. The distance from the turning center CL to the rearmost member can be reduced while the counterweight 6a that gives the reversing moment to the work vehicle is provided.
The work vehicle performs a turning operation around the turning center CL in the work, and the occupied area at the time of the turning operation is a circle which is a trajectory of the rear end member 3c of the turning table 3. Therefore, the occupied area at the time of the turning operation is not determined by the counter weight 6a fixed to the turning table 3. As a result, the space for other work other than the work vehicle is reduced as much as possible, and therefore, the work efficiency of the entire work site is reduced.
[0027]
Next, a second embodiment of the counterweight device for a work vehicle according to the present invention will be described with reference to FIGS.
[0028]
Reference numeral 3d denotes a turntable interior space portion, 3e denotes a connection plate, and 6b denotes a counterweight. Other reference numerals are the same as those used in the description of the first embodiment, and a description thereof will be omitted.
[0029]
In the second embodiment, the mounting position of the counterweight 6b is different from the mounting position of the counterweight 6a in the first embodiment.
The counter weight 6b is attached to the turntable interior space 3d between the plane connecting the lower ends of the left and right plate members 3b and the lower surface of the stored boom 4. It may be attached by welding to the inside of the rear end member 3c or the inside of the plate-shaped member 3b, and may be another attachment method using bolts or the like. If there is a connecting plate 3e connecting the pair of plate members 3b, it may be mounted on the connecting plate 3e, so that the counter weight 6b is supported during assembly. Since it is not necessary to assemble, assembly can be performed easily.
[0030]
With this configuration, the rearmost member from the turning center CL is the rear end member 3c of the turning table. The distance from the turning center CL to the rearmost member can be reduced by the thickness of the counterweight in the front-rear direction. The distance from the turning center CL to the rearmost member can be reduced while the counterweight 6b that gives the work vehicle a reversing moment is provided.
Further, since the counter weight 6b does not protrude outward in the width direction from the plate-shaped member 3b, it is possible to reduce the size of the turntable including the counter weight in the width direction.
The work vehicle performs a turning operation around the turning center CL in the work, and the occupied area at the time of the turning operation is a circle which is a trajectory of the rear end member 3c of the turning table 3. Therefore, the occupied area at the time of the turning operation is not determined by the counter weight 6b fixed to the turning table 3. As a result, the space for other work other than the work vehicle is reduced as much as possible, and therefore, the work efficiency of the entire work site is reduced.
[0031]
Next, a third embodiment of the counterweight device for a work vehicle according to the present invention will be described with reference to FIGS.
[0032]
Reference numeral 11 denotes a base, 12 denotes a swivel bearing, 13 denotes a swivel base, 13a denotes a swivel base, 13b denotes a plate-shaped member of the swivel base, 13c denotes a rear end member of the swivel base, and 14 denotes a boom. , 14a are base end booms, 15 is an up / down cylinder, 16 and 16a are counterweights, B is a vehicle, and CL1 is a turning center.
[0033]
The swivel base 13 is attached to the base 11 of the vehicle B via a swivel bearing 12 so as to be free to swivel. The swivel base 13 fixes the swivel base 13 a rising up in a columnar shape to the swivel bearing 12, and moves a pair of plate-like members 13 b parallel to the left and right from the rear end of the upper end of the swivel base 13 a behind the rear end of the swivel bearing 12. It protrudes. The rear ends of the pair of plate members 13b, 13b are connected by a rear end member 13c located in the left-right direction.
[0034]
The swivel base 13 supports the base end of the base boom 14a of the boom 14 which can be extended and retracted at the rear end so as to be able to move up and down. The up-and-down cylinder 15 is connected between a proper position of the swivel base 13 and a proper position of the base end boom 14a, and drives the boom 14 to be able to move up and down.
[0035]
The counterweight 16a is attached to the outer side surface 13b1 of the plate-like member 13b by welding. Other mounting methods such as bolts may be used. The rear end of the counterweight 16a is located forward of the rear end of the swivel base 13 (inside of an arc C11 having a radius R11 and passing through the rear end of the swivel base 13 around the center of rotation (radial center of the swivel bearing) CL1). Better to enter).
[0036]
With this configuration, the rearmost member from the turning center CL1 becomes the rear end member 13c of the swivel. The distance from the turning center CL1 to the rearmost member can be reduced by the thickness of the counterweight in the front-rear direction. The distance from the turning center CL1 to the rearmost member can be reduced while the counterweight 16a that gives the reversing moment to the work vehicle is provided.
Further, since the swivel base 13 has the swivel base 13a that stands up in a columnar shape, even a work vehicle having a high structure (a cab, a tool box, or the like) near the swivel base 13 can be used. Therefore, interference with these high structures can be avoided, and the counter weight 16a can be provided.
The work vehicle performs a turning operation around the turning center CL <b> 1 in the operation, and the occupied area at the time of the turning operation is a circle which is a trajectory of the rear end member 13 c of the turning table 13. Therefore, the occupied area at the time of the turning operation is not determined by the counter weight 16a fixed to the turning table 13. As a result, the space for other work other than the work vehicle is reduced as much as possible, and therefore, the work efficiency of the entire work site is reduced.
[0037]
Next, a fourth embodiment of the counterweight device for a work vehicle according to the present invention will be described with reference to FIGS.
[0038]
Reference numeral 13d denotes a space inside the swivel base, 13e denotes a connection plate, and 16b denotes a counterweight. Other reference numerals are the same as those used in the description of the third embodiment, and a description thereof will be omitted.
[0039]
In the fourth embodiment, the mounting position of the counter weight 16b is different from the mounting position of the counter weight 16a of the third embodiment.
The counter weight 16b is attached to the space 13d in the swivel base between the plane connecting the lower ends of the left and right plate members 13b and the lower surface of the stored boom 14. It may be attached by welding to the inside of the rear end member 13c or the inside of the plate-like member 13b, and may be another attachment method using bolts or the like. When there is a connecting plate 13e connecting the pair of plate members 13b, 13b, the connecting member 13e may be mounted on the connecting plate 13e. In this case, the counterweight 16b is supported during assembly. Since it is not necessary to assemble, assembly can be performed easily.
[0040]
With this configuration, the rearmost member from the turning center CL1 becomes the rear end member 13c of the swivel. The distance from the turning center CL1 to the rearmost member can be reduced by the thickness of the counterweight in the front-rear direction. The distance from the turning center CL1 to the rearmost member can be reduced while the counterweight 16b that gives the reversing moment to the work vehicle is provided.
Further, since the swivel base 13 has the swivel base 13a that stands up in a columnar shape, even a work vehicle having a high structure (a cab, a tool box, or the like) near the swivel base 13 can be used. Thus, interference with these high structures can be avoided, and the counter weight 16b can be provided.
The work vehicle performs a turning operation around the turning center CL <b> 1 in the operation, and the occupied area at the time of the turning operation is a circle which is a trajectory of the rear end member 13 c of the turning table 13. Therefore, the occupied area at the time of the turning operation is not determined by the counter weight 16b fixed to the turning table 13. As a result, the space for other work other than the work vehicle is reduced as much as possible, and therefore, the work efficiency of the entire work site is reduced.
[0041]
Further, the counterweight 16b in the fourth embodiment of the counterweight device for a work vehicle according to the present invention may be as follows.
[0042]
Reference numeral 15a denotes a mounting portion of the undulating cylinder 15.
[0043]
The up / down cylinder 15 is mounted along the lower surface of the base end boom 14a, and the counterweight 16b is provided between the rear end of the up / down cylinder mounting bracket 15a of the up / down cylinder 15 and the rear end member 13c of the swivel base 13. Is mounted on the turntable interior space 13d. The mounting bracket for the up / down cylinder 15 may be any mounting portion on the rear side of the swivel-side up / down cylinder mounting bracket 15a or the boom-side up / down cylinder mounting bracket.
[0044]
Along with the effect of the fourth embodiment, the arrangement can be made such that the turning over moment is most effectively provided in the swivel space 13d.
[0045]
The counterweight 6b according to the second embodiment of the work vehicle counterweight device of the present invention can also achieve the same configuration and effect as the counterweight 16b.
[0046]
Further, the counterweight 16 in the fourth embodiment of the counterweight device for a work vehicle according to the present invention may be as follows.
[0047]
Reference numeral 16c is a counterweight.
[0048]
The counterweight 16c is attached to the turntable interior space 13d so that at least a part of the counterweight 16c overlaps the undulating cylinder 15 in a side view or a plan view.
[0049]
In addition to the effect of the fourth embodiment, even when the counter weight is additionally provided, the turntable interior space 13d at the position acting as the reversing moment can be used.
[0050]
In the above description, the counterweight is described as an integral type. However, the counterweight may be divided into a plurality of parts and may be mounted in various shapes depending on the mounting location.
[0051]
In addition, the base and the protruding portion of the swivel base are described as being separate members from the base member and the protruding member, and they are connected to each other. .
[0052]
Furthermore, the truck has been described as an example of a truck crane truck and a high-altitude truck, but it is needless to say that the present invention can be applied to other trucks that include a swivel, a boom, and an up-and-down cylinder and require a counterweight.
[0053]
【The invention's effect】
First, in claim 1 of the present invention, the counterweight device of the work vehicle is mounted on the base of the vehicle via a slewing bearing so as to be pivotable, and the protruding portion is provided rearward from the rear end of the slewing bearing from the rear end of the base. It has a pair of left and right projecting swivels, a boom that supports its base end at the rear end of the swivel so as to be able to raise and lower, and an up-and-down cylinder connected between the right place of the swivel and the right place of the boom. A counterweight device for a work vehicle, wherein a counterweight is attached to a front side of a rear end of the swivel base and to an outer side surface of the protrusion.
[0054]
With this configuration, the member at the rearmost end from the turning center is a member at the rear end of the swivel. The effect is that the distance from the center of rotation to the rearmost member can be reduced by the thickness of the counterweight in the front-rear direction.
[0055]
According to claim 2 of the present invention, the counterweight device of the work vehicle is pivotally mounted on the base of the vehicle via a slewing bearing, and its base is attached to the base of the vehicle. A work vehicle having a plate-like projecting swivel, a boom supporting the base end of the swivel at the rear end thereof so as to be able to be raised and lowered, and an up-and-down cylinder connected between the right place of the swivel and the right place of the boom. Wherein the counterweight is attached to a space inside the swivel base between a plane connecting the left and right lower ends of the protruding portion and the lower surface of the stored boom.
[0056]
With such a configuration, in addition to the effect of the first aspect, the counterweight does not protrude in the width direction from the plate-shaped member, so that the size of the turntable including the counterweight can be reduced in the width direction. is there.
[0057]
According to a third aspect of the present invention, the swivel base of the counterweight device for a work vehicle according to the first or second aspect is configured such that a base is raised in a columnar shape on the swivel bearing and a protruding portion is provided rearward from a rear end of the swivel bearing near an upper end. And a pair of left and right plate-like projections.
[0058]
With such a configuration, the effect according to claim 1 or 2 can be applied to a work vehicle having a tall structure in the vicinity of the turntable together with the effect according to claim 1 or 2.
[0059]
According to a fourth aspect of the present invention, the up / down cylinder of the counterweight device for a work vehicle according to the second or third aspect is mounted along a lower surface of the boom, and the counterweight is mounted on a swivel-side up / down cylinder mounting bracket. Alternatively, the boom-side up / down cylinder mounting bracket is mounted in a space inside the swivel base between the rear end of the rear bracket and the rear end of the swivel base.
[0060]
With such a configuration, the counterweight can be arranged so as to most effectively give the reversing moment of the space inside the swivel base, in addition to the effect of the second or third aspect.
[0061]
According to a fifth aspect of the present invention, the counterweight of the counterweight device for a work vehicle according to the second, third or fourth aspect is configured such that the counterweight overlaps at least a part with the undulating cylinder in a side view or a plan view. It was constructed by attaching to the inner space.
[0062]
With such a configuration, in addition to the effect of the second, third, or fourth aspect, even when the counterweight is additionally provided, the space inside the swivel table at the position acting as the reversing moment can be used.
[Brief description of the drawings]
FIG. 1 is a side view showing a truck crane to which a counterweight device for a work vehicle according to the present invention is applied.
FIGS. 2A and 2B are explanatory diagrams showing the first embodiment, in which FIG. 2A is a side view and FIG. 2B is a plan view.
FIGS. 3A and 3B are explanatory views showing a second embodiment, in which FIG. 3A is a side view and FIG. 3B is a plan view.
FIG. 4 is a side view showing an aerial work vehicle to which the work vehicle counterweight device of the present invention is applied.
FIGS. 5A and 5B are explanatory diagrams showing a third embodiment, in which FIG. 5A is a side view and FIG. 5B is a plan view.
FIGS. 6A and 6B are explanatory diagrams showing a fourth embodiment, in which FIG. 6A is a side view and FIG. 6B is a plan view.
[Explanation of symbols]
1, 11 bases,
2,12 slewing bearing,
3, 13 swivel,
3b, 13b plate member of the swivel base,
3d, 13d turntable interior space,
4, 14 boom,
5,15 undulating cylinder,
6, 6a, 6b, 16a, 16a, 16b, 16c counterweight,
A, B vehicles

Claims (5)

The base is pivotally attached to the base of the vehicle via a swivel bearing, and the protruding part is protruded from the rear end of the base into a pair of left and right plates protruding rearward from the rear end of the swivel bearing. A counterweight device for a work vehicle having a boom that supports its base end in an up-and-down manner, and an up-and-down cylinder connected between a proper position of a swivel and a proper position of the boom,
A counterweight device, wherein a counterweight is attached to a front side of a rear end of the swivel base and on an outer side surface of the protrusion. The base is pivotally attached to the base of the vehicle via a swivel bearing, and the protruding part is protruded from the rear end of the base into a pair of left and right plates protruding rearward from the rear end of the swivel bearing. A counterweight device for a work vehicle having a boom that supports its base end in an up-and-down manner, and an up-and-down cylinder connected between a proper position of a swivel and a proper position of the boom,
A counterweight device for a working vehicle, wherein a counterweight is attached to a space inside a swivel table between a plane connecting the left and right lower ends of the protruding portion and a lower surface of the stored boom. 3. The swivel table according to claim 1, wherein the swivel base is configured such that a base portion is raised in a column shape on the swivel bearing, and a protruding portion protrudes rearwardly from a rear end of the swivel bearing in a pair of left and right plates near an upper end. Work vehicle counterweight device. The up / down cylinder is attached along the lower surface of the boom, and the counterweight is attached to the rear end of the rear bracket of the swivel-side up / down cylinder mounting bracket or the boom-side up / down cylinder mounting bracket and to the back of the swivel. 4. The counterweight device for a working vehicle according to claim 2, wherein the counterweight device is attached to a space inside the swivel table between the ends. 5. The work vehicle according to claim 2, wherein the counterweight is attached to the turntable interior space such that at least a part of the counterweight overlaps with the undulating cylinder in a side view or a plan view. Counterweight device.

Images