JP5608689B2 - Weight adjustment wheel and wheel type work vehicle - Google Patents

Description

  The present invention relates to a shaft weight adjusting weight and a wheel-type work vehicle equipped with the shaft weight adjusting weight.

  A wheel-type work vehicle is known in which a counterweight is provided on the rear side of a revolving structure (see Patent Document 1).

  A wheel-type work vehicle has a predetermined weight, for example, 10 to 10, according to vehicle inspection regulations, for a front-wheel-side vehicle body weight (front-wheel-side axle weight) and a rear-wheel-side vehicle body weight (rear-wheel-side axle weight). It is necessary to keep it below 12 tons.

  In the wheeled work vehicle described in Patent Document 1, the counterweight is divided into upper and lower parts of the upper counterweight and the lower counterweight, and only the upper counterweight is removed during traveling while the lower counterweight is attached to the wheeled work vehicle. It is configured to balance the axle load.

JP 2006-188817 A

  Wheel-type work vehicles such as wheel-type hydraulic excavators have vehicle body dimensions such as height dimensions, width dimensions, and length dimensions that are less than or equal to the prescribed dimensions, in addition to the axle weights on the front and rear wheels, as described above. It is necessary to take a running posture. However, in a large work vehicle having a large total weight, the vehicle weight on the front wheel side (front wheel side axle weight) and the vehicle weight on the rear wheel side (rear wheel side axle) while taking a traveling posture that satisfies the body dimensions specified by the vehicle inspection. It is difficult to reduce the weight to a predetermined weight or less.

  In view of this, it is conceivable that the vehicle body dimensions defined by the vehicle inspection are satisfied with the traveling posture as a state in which a work tool (attachment) such as a bucket provided at the tip of the arm of the wheel-type hydraulic excavator is removed. However, when the work implement is removed, the center of gravity of the wheeled excavator is located on the rear side compared to when the work implement is attached. The weight may exceed the prescribed weight specified by the vehicle inspection.

According to the first aspect of the present invention, in order to adjust the axial weight of the wheel type work vehicle, the weight for adjusting the axle load that is mounted in place of the work tool that is rotatably provided at the tip of the arm of the wheel type work vehicle. It is directly or indirectly attached to a plate-like weight part, an arm side attaching part that is directly or indirectly attached to the tip of the arm, and a link member that is connected to a hydraulic cylinder for driving the work tool. A weight for adjusting the axial load.
According to a second aspect of the present invention, in the weight for adjusting the axial load according to the first aspect, the arm-side attachment portion is inserted with a first pin for directly or indirectly attaching the work tool to the tip of the arm. The arm side insertion hole, and the link side attachment portion has a link side insertion hole through which a second pin for attaching the work tool directly or indirectly to the link member is inserted for adjusting the axial load. The weight is attached to the arm and the link member by inserting the first pin into the arm side insertion hole and inserting the second pin into the link side insertion hole.
According to a third aspect of the present invention, in the weight adjustment shaft weight according to the second aspect, the arm-side holding portion that holds the first pin and the link-side holding portion that holds the second pin, It is characterized by being indirectly attached to the arm and the link member via a work tool attaching / detaching device capable of adjusting the holding interval between the pin and the second pin.
According to a fourth aspect of the present invention, there is provided a weight adjusting weight according to any one of the first to third aspects, a running posture detecting means for detecting the posture of the weight adjusting weight at least with respect to the arm, and a running posture detection. The posture of the axle load adjustment weight detected by the means is determined to be a posture that satisfies the vehicle inspection regulations, and the posture of the axle load adjustment weight is determined by the vehicle posture determination means by the vehicle posture determination means. When it is determined that the posture does not satisfy the above-described condition, the wheel-type work vehicle includes notification means for notifying that effect.
According to a fifth aspect of the present invention, in the wheel type work vehicle according to the fourth aspect, the link member has a shaft weight adjusting weight below the arm when the cylinder rod of the hydraulic cylinder for driving the work tool is most extended. The weight adjustment weight is arranged in front of the arm when the cylinder rod of the hydraulic cylinder for driving the work tool is retracted most, and the traveling posture detecting means adjusts the axial weight with respect to the arm. Weight position detecting means for detecting the posture of the weight for use, and the running posture determining means is configured such that the weight adjustment weight is adjusted so that the weight for adjusting the axial load is above the arm side mounting portion and the link side mounting portion is above and forward. When it is detected that it is arranged at a predetermined position, it is determined that the posture of the weight for adjusting the axle load satisfies the vehicle inspection regulations.

  According to the present invention, it is possible to easily satisfy the vehicle body dimensions and the vehicle body weight defined by the vehicle inspection in the wheel type work vehicle by attaching the weight for adjusting the axle load instead of the work tool such as the bucket.

1 is a side view of a wheeled hydraulic excavator that is an example of a wheeled work vehicle according to a first embodiment of the present invention. The height and length dimensions of the wheel-type hydraulic excavator in FIG. 1, the distance from the bucket to the running surface, the vehicle weight on the front wheel side (front wheel side axle weight) and the vehicle weight on the rear wheel side (rear wheel side axle weight) Illustration to explain. The perspective view which shows the weight for axial load adjustment which concerns on the 1st Embodiment of this invention. The side view which shows the state in which the weight for axial weight adjustment of FIG. 3 was attached to the arm and B link. The figure explaining the distance from the weight for axle load adjustment to a running surface. The block diagram which shows the control system structure of the wheel type work vehicle which concerns on the 2nd Embodiment of this invention. The figure which shows the proximity switch provided in the front-end | tip of the arm of the wheel type work vehicle which concerns on the 2nd Embodiment of this invention. The side view which shows the weight for axial load adjustment attached to the arm of the wheel type work vehicle which concerns on the 3rd Embodiment of this invention via the work tool attachment / detachment apparatus. The figure explaining operation | movement of the working tool attachment / detachment apparatus of FIG. The side view which shows the state by which the auxiliary | assistant weight was mounted | worn with the weight for axial load adjustment which concerns on the modification of this invention.

-First embodiment-
DESCRIPTION OF EMBODIMENTS Hereinafter, an embodiment of an axle weight adjusting weight according to the present invention and an embodiment of a wheel type work vehicle equipped with the axle weight adjusting weight according to the present invention will be described with reference to the drawings. FIG. 1 is a side view of a wheeled hydraulic excavator which is an example of a wheeled work vehicle according to the first embodiment of the present invention. For convenience of explanation, the front-rear and vertical directions are defined as shown in FIG.

  The wheel-type hydraulic excavator includes a traveling body 100 and a revolving body 102 that is mounted on the traveling body 100 so as to be able to revolve by a revolving device (not shown). The swivel body 102 is provided with a cab 104 and a two-piece type front working device 110. A counterweight 109 is attached to the rear part of the revolving unit 102 to balance the machine body during work.

  The front work device 110 includes a first boom 105, a second boom 106, an arm 107, and a bucket 108. The first boom 105, the second boom 106, and the arm 107 are driven by a first boom cylinder 115, a second boom cylinder 116, and an arm cylinder 117, respectively, and are raised and lowered. The bucket 108 is attached at the tip of the arm 107 so as to be pivotable in the vertical direction with respect to the arm 107, and is driven by a bucket cylinder 118 which is a bucket driving hydraulic cylinder.

  A pair of plate-like brackets 151 are attached to the base of the bucket 108, and a first pin 141 attached to the tip of the arm 107 and a second pin 142 attached to the link member are inserted into each bracket 151. ing. That is, the bucket 108 is directly attached to the tip of the arm 107 by the first pin 141 and is directly attached to the link member by the second pin 142.

  The link member includes an A link 152A and a B link 152B. One end of each of the A link 152A and the B link 152B is pivotally attached to the tip of the cylinder rod of the bucket cylinder 118 by a pin 143. The other end of the A link 152A is pivotally attached to the arm 107 by a pin 144, and the other end of the B link 152B is pivotally attached to the bracket 151 of the bucket 108 by a second pin 142.

  When the cylinder rod of the bucket cylinder 118 is extended, the A link 152A and the B link 152B operate so as to be separated from each other, and the bucket 108 rotates toward the rear of the arm 107 with the first pin 141 as the rotation center. That is, it works in the cloud.

  When the cylinder rod of the bucket cylinder 118 is retracted, the A link 152A and the B link 152B operate so as to be close to each other, and the bucket 108 rotates toward the front of the arm 107 with the first pin 141 as the rotation center. That is, a dump operation is performed.

  FIG. 2 shows the height H, length L, distance Y from the bucket 108 to the running surface 190, the vehicle weight Wf on the front wheel 120F side, and the vehicle weight on the rear wheel 120R side. It is a figure explaining Wr. Wheel-type hydraulic excavators must meet the regulations of vehicle inspection for vehicle weight and body dimensions. Regarding the vehicle body weight, each of a vehicle body weight Wf on the front wheel 120F side (hereinafter referred to as front wheel side axle weight) and a vehicle body weight Wr on the rear wheel 120R side (hereinafter referred to as rear wheel side axle weight) is set to a predetermined weight (for example, 12 Ton) or less, and the total weight Wa (Wa = Wf + Wr) needs to be restricted to a predetermined weight (for example, 24 tons) or less. Regarding vehicle body dimensions, it is necessary to limit the length dimension L to a predetermined dimension (for example, 12000 mm) or less, the height dimension H to a predetermined dimension (for example, 4000 mm) or less, and the width dimension (not shown) to a predetermined dimension (for example, 2550 mm) or less. is there.

  The traveling posture of the wheeled hydraulic excavator will be described. In order to set the height dimension H of the wheel-type hydraulic excavator to a predetermined dimension or less, the cylinder rod of the bucket cylinder 118 is extended to the stroke end, and the bucket 108 is disposed behind the arm 107. By extending the cylinder rod of the arm cylinder 117 to a predetermined length, the arm 107 is brought into a substantially vertical posture. By extending the cylinder rod of the second boom cylinder 116 to a predetermined length, the second boom 106 is brought into a substantially horizontal posture. The cylinder rod of the first boom cylinder 115 is extended to the stroke end, and the first boom 105 is brought into a substantially vertical posture.

  However, in a large wheeled hydraulic excavator with a large total weight, the balance between the front wheel side axle load Wf and the rear wheel side axle load Wr is adjusted while taking a running posture that satisfies the vehicle body dimensions prescribed by the vehicle inspection. It is difficult to reduce the axial weights Wf and Wr to a predetermined weight or less prescribed by the vehicle inspection.

  In a large wheeled hydraulic excavator with a large bucket 108 and arm 107, it is difficult to take a traveling posture in which the height dimension H is not more than a predetermined dimension prescribed by the vehicle inspection. Therefore, the following measures can be considered as a method of reducing the height dimension of the running posture.

  (1) In order to further rotate the bucket 108 to the rear of the arm 107, a countermeasure for setting the length of the cylinder rod of the bucket cylinder 118 long can be considered. Thus, the bucket 108 is rotated until the position of the lowermost end of the bucket 108 is not the bottom portion of the bucket 108 but the bracket 151 of the bucket 108, so that the distance Y has a margin, and the second boom 106 is provided by the margin. The height dimension H can be reduced by turning the sway downward. However, if the bucket cylinder 118 is extended for a longer time, when the cylinder rod of the bucket cylinder 118 is extended, the bracket 151 of the bucket 108 and the link members 152A, 152B may interfere with each other, There is a possibility that the upper part on the 1-pin 141 side and the lower part on the tip side of the arm 107 interfere with each other.

  (2) It is conceivable that the height dimension defined by the vehicle inspection is satisfied with the traveling posture being the state in which the bucket 108 provided at the tip of the arm 107 of the wheel type hydraulic excavator is removed. However, since the weight of the bucket 108 is as heavy as about 600 kg, for example, when the bucket 108 is removed, the center of gravity of the wheeled hydraulic excavator is located on the rear side compared to when the bucket 108 is attached. As a result, the rear wheel side axle load Wr may become heavy and the rear wheel side axle load Wr may exceed a predetermined weight defined by the vehicle inspection.

  Therefore, in the present embodiment, instead of the bucket 108 rotatably provided at the tip of the arm 107, a weight 160 for adjusting the axle load smaller in size than the bucket 108 is attached, so that the wheel-type hydraulic excavator The purpose is to adjust the axle weight to meet the body dimensions and weight specified by the vehicle inspection.

  FIG. 3 is a perspective view of the axle load adjusting weight 160. The axle weight adjusting weight 160 has a rectangular flat plate-like weight portion 161 and a pair of mounting plates 162 rising vertically from the wide surface of the weight portion 161, and has a weight similar to that of the bucket 108 described above. . The pair of mounting plates 162 are flat and welded to the weight portion 161 so as to be parallel to each other.

  Each of the pair of mounting plates 162 has an arm side insertion hole 162h1 through which the first pin 141 attached to the tip of the arm 107 is inserted, and a link side insertion hole through which the second pin 142 attached to the B link 152B is inserted. 162h2.

  The distance between the arm side insertion hole 162h1 and the link side insertion hole 162h2 is set to the same dimension as the distance between the pair of pin insertion holes provided in the bracket 151 of the bucket 108 described above.

  The distance b (the distance between the inner side surfaces) between the pair of mounting plates 162 is set slightly wider than the width dimension (not shown) of the arm 107. The distance h from each of the arm-side insertion hole 162h1 and the link-side insertion hole 162h2 to the wide surface of the weight part 161 is set to a dimension such that the weight part 161 does not interfere with the arm 107 in the rotation range of the axle load adjusting weight 160. Has been. The pivoting operation of the axle weight adjusting weight 160 will be described later.

  The first pin 141 is inserted into an insertion hole (not shown) provided at the distal end of the arm 107 and the arm side insertion hole 162h1 of the mounting plate 162 in a state where the distal end of the arm 107 is disposed inside the pair of mounting plates 162. Thus, the mounting plate 162 is directly attached to the tip of the arm 107 (see FIG. 4A). The attachment plate 162 is directly attached to the B link 152B by inserting the second pin 142 through the insertion hole (not shown) provided at the end of the B link 152B and the link side insertion hole 162h2 of the attachment plate 162 ( (See FIG. 4 (a)).

  FIG. 4 is a side view showing a state in which a shaft weight adjusting weight 160 is attached to the arm 107 and the B link 152B in place of the bucket. FIG. 4A is a view showing a state in which the cylinder rod of the bucket cylinder 118 is most extended and the shaft weight adjusting weight 160 is positioned below the arm 107, and FIG. FIG. 6 is a view showing a state in which the shaft weight adjusting weight 160 is positioned in front of the arm 107 with the most contraction.

  As shown in FIGS. 4A and 4B, the weight 160 for adjusting the axial load 160 is directly connected to the tip of the arm 107 by the first pin 141 and the second pin 142 in the same manner as the bucket 108. Since it is attached to the link 152B, it can be rotated in the vertical direction around the first pin 141 as the rotation center in accordance with the expansion and contraction operation of the bucket cylinder 118.

  When the cylinder rod of the bucket cylinder 118 is extended, the second pin 142 and the pin 144 are moved away from each other, that is, the A link 152A and the B link 152B are opened, and the shaft weight adjusting weight 160 is moved to the first pin. It rotates in the A direction around 141 as a rotation center. By extending the cylinder rod of the bucket cylinder 118 the most, the weight for adjusting the axial load 160 is disposed below the arm 107 as shown in FIG.

  When the cylinder rod of the bucket cylinder 118 is retracted, the second pin 142 and the pin 144 are moved closer to each other, that is, the A link 152A and the B link 152B are closed, and the axle load adjusting weight 160 is moved to the first pin. It rotates in the B direction around 141 as a rotation center. By retracting the cylinder rod of the bucket cylinder 118 the most, the shaft weight adjusting weight 160 is disposed in front of the arm 107 as shown in FIG.

  That is, in the link member (link mechanism) configured to include the A link 152A and the B link 152B, the shaft weight adjusting weight 160 is disposed below the arm 107 when the cylinder rod of the bucket cylinder 118 is most extended. The weight 160 for adjusting the axial load is arranged in front of the arm 107 when the cylinder rod of the bucket cylinder 118 is retracted most.

  FIG. 5 is a diagram for explaining the distances Ya1 and Ya2 from the axle weight adjusting weight 160 to the running surface 190. FIG. In FIG. 5, in order to compare the state in which the axle weight adjusting weight 160 is mounted with the state in which the bucket 108 is mounted, the outer shape of the bucket 108 is indicated by a two-dot chain line. The distances Yb1 and Yb2 are shown. FIG. 5A is a view showing a state in which the cylinder rod of the bucket cylinder 118 is most extended and the shaft weight adjusting weight 160 is positioned below the arm 107, and FIG. FIG. 6 is a view showing a state in which the shaft weight adjusting weight 160 is positioned in front of the arm 107 with the most contraction.

  As shown in FIG. 5 (a), in the state where the bucket cylinder 118 is extended to the maximum, the length (full length) La1 of the wheel-type hydraulic excavator equipped with the axle weight adjusting weight 160 and the wheel equipped with the bucket 108 are shown. The length dimension (full length) Lb1 of the hydraulic excavator is the same dimension (La1 = Lb1). On the other hand, the distance Ya1 from the traveling surface 190 to the axle load adjusting weight 160 is longer than the distance Yb1 from the traveling surface 190 to the bucket 108 (Ya1> Yb1). For this reason, when the weight 160 for adjusting the axle load is attached, the height dimension (total height) H of the wheeled hydraulic excavator can be reduced by operating the second boom cylinder 116 or the like.

  As shown in FIG. 5B, in the state where the bucket cylinder 118 is most retracted, the length dimension (full length) La2 of the wheeled hydraulic excavator equipped with the axle weight adjusting weight 160 is the wheel equipped with the bucket 108. It is shorter than the length dimension (full length) Lb2 of the hydraulic excavator (La2 <Lb2). The distance Ya2 from the traveling surface 190 to the axle load adjusting weight 160 is longer than the distance Yb2 from the traveling surface 190 to the bucket 108 (Ya2> Yb2). For this reason, when the weight 160 for adjusting the axle load is attached, the height dimension (total height) H of the wheeled hydraulic excavator can be reduced by operating the second boom cylinder 116 or the like.

  As shown in FIGS. 5 (a) and 5 (b), the overall length La2 is longer than the overall length La1 (La2> La1), but the vehicle inspection is regulated even when the bucket cylinder 118 is retracted because the overall length has a margin. When the predetermined length can be satisfied, it is preferable to arrange the second pin 142 so as to be located above and in front of the first pin 141 as shown in FIG.

  When the axle weight adjusting weight 160 is positioned in front of the arm 107 (see FIG. 5B), the axle weight adjusting weight 160 is positioned below the arm 107 (see FIG. 5A). As compared with the above, the total height H can be reduced by the difference (Ya2-Ya1) between the distance Ya2 and the distance Ya1. In the present embodiment, the overall height H of the wheeled hydraulic excavator can be reduced by about 400 to 500 mm. When the axle weight adjusting weight 160 is positioned in front of the arm 107 (see FIG. 5B), the axle weight adjusting weight 160 is positioned below the arm 107 (see FIG. 5A). As compared with the above, the center of gravity of the wheel-type hydraulic excavator is positioned forward, and the rear axle weight Wr can be reduced. Therefore, the weight of the axle weight adjusting weight 160 can be reduced.

  In addition, the weight 160 for adjusting the axial load can increase the weight while suppressing the increase in the total length by setting the thickness of the weight portion 161 to be thick or by setting the length in the left-right width direction to be long. As shown in FIG. 5B, when taking a running posture in which the axle weight adjusting weight 160 is disposed in front of the arm 107, the end of the weight portion 161 on the second pin 142 side is extended to extend the axle weight. The weight of the adjustment weight 160 may be increased.

According to 1st Embodiment described above, there can exist the following effects.
(1) The weight 160 for adjusting the axial load is composed of the plate-shaped weight portion 161 and the pair of mounting plates 162. Since the weight portion 161 is formed in a plate shape, the dimensions can be easily set, and the wheel type when the axle weight adjusting weight 160 is attached is compared with the total height H of the wheel type hydraulic excavator when the bucket 108 is attached. The overall height H of the hydraulic excavator can be easily reduced. Further, by setting the weight of the axle weight adjusting weight 160 to the same weight as that of the bucket 108, it is possible to suppress the rear wheel side axle weight Wr from increasing. As a result, by installing the axle weight adjusting weight 160 instead of the bucket 108, it is possible to easily take a running posture that satisfies the vehicle body dimensions and the vehicle body weight defined by the vehicle inspection.

(2) The shaft weight adjusting weight 160 has the first pin 141 inserted in the arm side insertion hole 162h1 provided in each of the pair of mounting plates 162, and the second pin 142 inserted in the link side insertion hole 162h2. By doing so, it can be directly attached to the arm 107 and the B link 152B. The first pin 141 and the second pin 142 can share the shaft weight adjusting weight 160 and the bucket 108 as pins for mounting the arm 107 and the B link 152B, respectively. Since it can be mounted in the same mounting procedure as in 108, the operator can easily perform the work of mounting the axle load adjusting weight 160 in place of the bucket 108.

(3) Since the pair of mounting plates 162 is welded to the plate-like weight portion 161, the manufacturability is good and the production cost can be reduced.

-Second embodiment-
A wheel-type hydraulic excavator according to the second embodiment will be described with reference to FIGS. 6 and 7. FIG. 6 is a block diagram showing a control system configuration of a wheeled hydraulic excavator according to the second embodiment of the present invention, and FIG. 7 shows an arm 107 of the wheeled hydraulic excavator according to the second embodiment of the present invention. It is a figure which shows the proximity switch 278 provided in the front-end | tip. In the figure, the same or corresponding parts as those in the first embodiment are denoted by the same reference numerals, and differences will be mainly described.

  In the second embodiment, the traveling posture of the wheel-type hydraulic excavator is detected, it is determined whether or not the posture satisfies the vehicle inspection regulations, and it is determined that the posture state cannot satisfy the vehicle inspection regulations. In some cases, the operator can be notified of this.

  As shown in FIG. 6, the wheel hydraulic excavator control device includes a display device 250 (monitor), a display controller 230, and a vehicle body controller 270. The display controller 230 includes a display control unit 231 and a running posture determination unit 232, and the vehicle body controller 270 includes a vehicle body information management unit 271. The display controller 230 and the vehicle body controller 270 are configured to include an arithmetic processing unit having a CPU, a ROM, a RAM, and other peripheral circuits.

  The vehicle body information management unit 271 includes an angle sensor 275 that detects the rotation angle of the first boom 105, an angle sensor 276 that detects the rotation angle of the second boom 106, and an angle sensor 277 that detects the rotation angle of the arm 107. And a proximity switch 278 for detecting that the axial weight adjusting weight 160 is close to the arm 107, and signals from the sensors 275 to 277 and the proximity switch 278 are input. Note that vehicle information such as engine speed, remaining fuel, and coolant temperature (not shown) is also input to the vehicle information management unit 271.

  The proximity switch 278 is a switch that detects the posture of the axial weight adjusting weight 160 with respect to the arm 107. As shown in FIG. 7, the proximity switch 278 is provided on the side near the tip of the arm 107. A contact plate 265 is welded to the mounting plate 162 of the axle weight adjusting weight 160. The contact plate 265 is provided so that the end surface of the contact plate 265 faces the proximity switch 278 when the cylinder rod of the bucket cylinder 118 is retracted most.

  The proximity switch 278 transmits an ON signal to the vehicle body information management unit 271 of the vehicle body controller 270 when the end of the contact plate 265 is close. In other words, when the proximity switch 278 detects that the second pin 142 is disposed at a predetermined position above and in front of the first pin 141, the posture of the axle load adjusting weight 160 is determined by the vehicle inspection. An ON signal indicating that the posture satisfies the regulation is transmitted to the vehicle body information management unit 271 of the vehicle body controller 270. The proximity switch 278 transmits an off signal to the vehicle body information management unit 271 of the vehicle body controller 270 when the end of the contact plate 265 is separated.

  As shown in FIG. 6, the vehicle body information management unit 271 outputs the input vehicle body information to the display control unit 231 of the display controller 230 and travels signals output from the angle sensors 275 to 277 and the proximity switch 278. Output to the posture determination unit 232.

  The running posture determination unit 232 includes a threshold table created in advance, and based on a signal indicating the rotation angle of each of the first boom 105, the second boom 106, and the arm 107, and a signal from the proximity switch 278, It is determined whether or not the driving posture satisfies the vehicle inspection regulations.

  The threshold value table is determined in advance in order to determine a traveling posture state that can satisfy the regulations of the vehicle inspection, and is stored in the traveling posture determination unit 232. The threshold value table includes the first threshold value FB1 and the second threshold value FB2 of the rotation angle of the first boom 105, the first threshold value SB1 and the second threshold value SB2 of the rotation angle of the second boom 106, and the rotation of the arm 107. It has a first threshold value A1 and a second threshold value A2 of the moving angle.

  The traveling posture determination unit 232 determines that the first condition is satisfied when the rotation angle θ of the first boom 105 is within the range of the first threshold value FB1 to the second threshold value FB2 (FB1 ≦ θ ≦ FB2). Determine. The traveling posture determination unit 232 determines that the second condition is satisfied when the rotation angle ω of the second boom 106 is within the range of the first threshold SB1 to the second threshold SB2 (SB1 ≦ ω ≦ SB2). Determine. The traveling posture determination unit 232 determines that the third condition is satisfied when the rotation angle γ of the arm 107 is within the range of the first threshold value A1 to the second threshold value A2 (A1 ≦ γ ≦ A2). judge. When the ON signal is input from the proximity switch 278, the running posture determination unit 232 determines that the fourth condition is satisfied.

  When all of the first to fourth conditions are satisfied, the traveling posture determination unit 232 determines that the wheeled hydraulic excavator is in a traveling posture capable of satisfying the vehicle inspection regulations. When any one of the first to fourth conditions is not satisfied, the traveling posture determination unit 232 determines that the wheeled hydraulic excavator is not in a traveling posture that satisfies the vehicle inspection regulations. When the traveling posture determination unit 232 determines that the wheeled hydraulic excavator is not in a traveling posture that satisfies the regulations of the vehicle inspection, the traveling posture determination unit 232 sends a notification signal to the display control unit 231 to display the fact on the display device 250. Output. When the notification signal is input from the travel posture determination unit 232, the display control unit 231 causes the display device 250 to display an image indicating that the current travel posture does not satisfy the vehicle inspection regulations.

  In the second embodiment, the postures of the first boom 105, the second boom 106, and the arm 107 detected by the angle sensors 275, 276, 277 and the proximity switch 278, respectively, and the weight 160 for adjusting the axial load relative to the arm 107 are provided. It was determined whether or not the posture satisfies the vehicle inspection regulations. When it is determined that any of the postures of the first boom 105, the second boom 106 and the arm 107 and the posture of the axle weight adjusting weight 160 does not satisfy the vehicle inspection regulations, the fact is notified.

According to 2nd Embodiment, in addition to the effect of (1)-(3) demonstrated in 1st Embodiment, there exists the following effect (4).
(4) When the traveling posture does not satisfy the regulations of the vehicle inspection, the display device 250 displays that fact, so the operator can easily determine whether or not the traveling posture is satisfied. Thereby, the operator can efficiently form a proper traveling posture, and can prevent traveling on a public road in an inappropriate traveling state.

  The travel posture determination control process described above may be started by an operator operating a posture check switch (not shown) provided in the driver's seat, or by automatically detecting depression of the accelerator pedal. You may start with.

-Third embodiment-
A wheeled hydraulic excavator according to a third embodiment will be described with reference to FIGS. 8 and 9. FIG. 8 is a side view showing a shaft weight adjusting weight 360 attached to the arm 107 of the wheel-type hydraulic excavator according to the third embodiment of the present invention via the work tool attaching / detaching device 300. FIG. 9 is a diagram for explaining the operation of the work tool attaching / detaching device 300. FIG. 9 shows a state in which the work tool attaching / detaching device 300 is attached to the arm 107 and the B link 152B, and the first pin 141 and the second pin 142 are illustrated as components on the arm 107 side. In FIG. 9, the first mounting pin 341 and the second mounting pin 342 mounted on the axle weight adjusting weight 360 are shown by two-dot chain lines. In the figure, the same or corresponding parts as those in the first embodiment are denoted by the same reference numerals, and differences will be mainly described.

  The axle weight adjusting weight 360 has the same configuration as that of the axle weight adjusting weight 160 described in the first embodiment, and is a rectangular flat plate-like weight portion 361 and a pair that rises vertically from the wide surface of the weight portion 361. The mounting plate 362 is provided. In the third embodiment, the axial weight adjusting weight 360 is indirectly attached to the arm 107 and the B link 152B via the work tool attaching / detaching device 300. The weight for adjusting the axial load 360 can be attached to the work tool attaching / detaching device 300 according to the distance between the pair of mounting plates 362 and the distance from the arm side insertion hole and the link side insertion hole to the wide surface of the weight portion 361. It is set to be length.

  As shown in FIG. 8, the work tool attaching / detaching device 300 is pivotally attached to one end of the B link 152 </ b> B by the second pin 142 and is pivotally attached to the tip of the arm 107 by the first pin 141. Although not shown, the work tool attaching / detaching device 300 rotates about the first pin 141 in the state where the work tool is held by the expansion / contraction operation of the bucket cylinder 118.

  The work tool attaching / detaching device 300 includes a hook-like arm-side holding part 346 and a link-side holding part 345 that hold the first attachment pin 341 and the second attachment pin 342 attached to the work tool such as the bucket 108. It has a mechanism capable of adjusting the holding interval between the first mounting pin 341 and the second mounting pin 342. In the third embodiment, the link side holding portion 345 rotates around the second pin 142 as a rotation center, and the holding interval between the first mounting pin 341 and the second mounting pin 342 can be adjusted.

  As shown in FIGS. 9A and 9B, the work tool attaching / detaching apparatus 300 slides the slide member 347 to the left side in the drawing by tightening a screw bolt (not shown) using a wrench. It can be configured. When the slide member 347 slides to the left in the drawing, the lock member 348 disposed at the tip of the slide member 347 presses the link side holding portion 345. The link side holding portion 345 pressed by the lock member 348 rotates around the second pin 142 as a rotation center. The lock member 348 abuts on the link side holding portion 345 and the slide member 347 and has an upper end surface abutting on the arm side holding portion 346.

  With reference to FIG. 9, the procedure for attaching the weight 160 for adjusting the axle load to the work implement attaching / detaching apparatus 300 will be described. A first attachment pin 341 for indirectly attaching the bucket 108 to the tip of the arm 107 via the work tool attaching / detaching device 300, and for attaching the bucket 108 to the B link 152B indirectly via the work tool attaching / detaching device 300. The second mounting pin 342 is removed, and the first mounting pin 341 and the second mounting pin 342 are inserted through the arm side insertion hole and the link side insertion hole of the shaft weight adjusting weight 160.

  As shown to Fig.9 (a), the holding | maintenance space | interval of the working tool attachment / detachment apparatus 300 is adjusted to a narrow state. The arm attachment portion 346 of the work tool attaching / detaching device 300 holds the first attachment pin 341 attached to the axle weight adjusting weight 360. A screw bolt (not shown) is tightened with a wrench, and the slide member 347 is slid to the left in the figure.

  As the slide member 347 moves to the left side in the figure, the lock member 348 presses the link side holding portion 345 and rotates so that the link side holding portion 345 opens around the second pin 142 as the rotation center. When the screw bolt is tightened to the position where the second mounting pin 342 attached to the shaft weight adjusting weight 360 is held by the link side holding portion 345 and fixed by a lock mechanism (not shown), the lock member 348 is held at a predetermined position. Thus, the state where the second attachment pin 342 is held by the link side holding portion 345 is maintained.

  The procedure for removing the axle load adjusting weight 360 from the work tool attaching / detaching device 300 may be performed by reversing the procedure described above. The procedure for attaching / detaching the bucket 108 to / from the work tool attaching / detaching device 300 is the same as the procedure for attaching / detaching the axle weight adjusting weight 360 described above.

  As shown in FIG. 8, the shaft weight adjusting weight 360 is, as described above, the distance between the arm side holding portion 346 that holds the first mounting pin 341 and the link side holding portion 345 that holds the second mounting pin 342. Are attached to the arm 107 and the B link 152B via a work tool attaching / detaching device 300 that can change the angle.

  In the third embodiment, since the bucket 108 is attached to the arm 107 and the B link 152B via the work tool attaching / detaching device 300, it is possible to set the height within the height defined by the vehicle inspection. Although it becomes difficult as compared with the configuration, the shaft weight adjusting weight 360 having a smaller size than the bucket 108 is mounted on the arm 107 and the B link 152B instead of the bucket 108, as described in the first embodiment ( The same effects as 1) to (3) are obtained. Furthermore, according to 3rd Embodiment, there exists the following effect (5).

(5) Since the weight adjustment weight 360 is attached in place of the bucket 108 attached to the work tool attaching / detaching device 300, the bucket 108 and the weight adjustment weight 360 can be easily replaced. it can.

The following modifications are also within the scope of the present invention, and one or a plurality of modifications can be combined with the above-described embodiment.
[Modification]
(1) The weight of the axle weight adjusting weight may be changeable. For example, as shown in FIG. 10, bolt insertion holes (not shown) are provided at the four corners of the rectangular flat weight portion 461 of the axle weight adjusting weight 460, and the bolt insertion holes (not shown) are similarly provided. The flat auxiliary weight 560 may be attached to the weight portion 461 with a bolt and a nut. By making the auxiliary weight 560 detachable from the weight portion 461 of the axle weight adjusting weight 460, the axle weight adjusting weight 460 can be shared between different models.

(2) In the first to third embodiments described above, the arm-side insertion hole 162h1 and the link-side insertion hole 162h2 are provided in each of the pair of mounting plates 162 and 362, and the arm-side insertion hole 162h1 and the link-side insertion are provided. A first pin 141 for directly attaching to the tip of the arm 107 or a first attachment pin 341 for indirectly attaching to each of the holes 162h2, and a second pin 142 or indirectly for attaching directly to the B link 152B The shaft weight adjusting weights 160 and 360 are attached to the arm 107 and the B link 152B by inserting the second attachment pins 342 for attaching them, but the present invention is not limited to this. For example, each of the mounting plates 162 and 362 may be divided to separately provide an arm side mounting portion that is attached to the tip of the arm 107 and a link side mounting portion that is attached to the B link 152B.

(3) In the second embodiment described above, the postures of the first boom 105, the second boom 106, the arm 107, and the axle load adjusting weight 160 are detected, and whether or not the traveling posture defined by the vehicle inspection is satisfied. However, the present invention is not limited to this. At least the attitude of the axle load adjusting weight 160 with respect to the arm 107 is detected, and it is determined whether or not the detected attitude of the axle load adjusting weight 160 is an attitude that satisfies the vehicle inspection regulations. The detection of the posture of the second boom 106 and the arm 107 and the determination of the posture may be omitted.

(4) In the second embodiment described above, the proximity switch 278 is adopted as the weight position detecting means for detecting the posture of the axial weight adjusting weight 160 relative to the arm 107, but the present invention is not limited to this. Instead of the proximity switch 278, an angle sensor that detects a rotation angle of the axial weight adjusting weight 160 with respect to the arm 107 may be employed.

(5) In the second embodiment described above, an image indicating that the current running posture does not satisfy the regulations for vehicle inspection is displayed on the display device 250 such as a monitor. However, the present invention is not limited to this. . It is good also as a simple structure which lights an indicator.

(6) In the above-described first to third embodiments, the weight portions 161 and 361 are formed in a rectangular flat plate shape, but the present invention is not limited to this. For example, the weight portions 161 and 361 may be formed in a disk shape.

(7) In the first to third embodiments described above, the weights 160 and 360 for adjusting the axle load are attached instead of the bucket 108 of the wheel excavator to adjust the axle weight of the wheel excavator. However, the present invention is not limited to this. Applying the present invention to the adjustment of the axial load of a wheeled work vehicle equipped with various work tools according to the work form, such as a fork, lifting magnet, etc. as a gripping and handling work tool, a crushing device as a crushing work tool, etc. Can do.

  The present invention is not limited to the above-described embodiment, and can be freely changed and improved without departing from the gist of the invention.

  DESCRIPTION OF SYMBOLS 100 Running body, 102 Revolving body, 104 Operator's cab, 105 First boom, 106 Second boom, 107 Arm, 108 Bucket, 109 Counterweight, 110 Front work device, 115 First boom cylinder, 116 Second boom cylinder, 117 Arm cylinder, 118 Bucket cylinder, 141 1st pin, 142 2nd pin, 143, 144 pin, 151 bracket, 152A A link, 152B B link, 160 Weight for adjusting axle load, 161 Weight part, 162 Mounting plate, 162h1 Arm side insertion hole, 162h2 Link-side insertion hole, 230 display controller, 231 display control unit, 232 travel posture determination unit, 250 display device, 265 contact plate, 270 vehicle body controller, 271 vehicle body information tube , 275-277 angle sensor, 278 proximity switch, 300 work tool attaching / detaching device, 341 first mounting pin, 342 second mounting pin, 345 link side holding portion, 346 arm side holding portion, 347 slide member, 348 lock member, 360 Weight adjustment weight, 361 Weight portion, 362 Mounting plate, 460 Weight adjustment weight, 461 Weight portion, 560 Auxiliary weight

Claims (5)

In order to adjust the axle load of the wheel-type work vehicle, a weight for adjusting the axle load that is mounted in place of the work tool that is rotatably provided at the tip of the arm of the wheel-type work vehicle,
A plate-like weight part;
An arm side mounting portion that is directly or indirectly attached to the tip of the arm;
A shaft weight adjusting weight, comprising: a link side attaching portion that is directly or indirectly attached to a link member connected to a hydraulic cylinder for driving the work implement. The axle weight adjusting weight according to claim 1,
The arm side attachment portion has an arm side insertion hole through which a first pin for attaching the work tool directly or indirectly to the tip of the arm is inserted,
The link side attachment portion has a link side insertion hole through which a second pin for attaching the work tool directly or indirectly to the link member is inserted,
The weight for adjusting the axial load is inserted into the arm and the link member by inserting the first pin into the arm side insertion hole and inserting the second pin into the link side insertion hole. Weight for adjusting axle load, characterized by being attached. The weight for adjusting the axial load according to claim 2,
Via a work tool attaching / detaching device capable of adjusting a holding interval between the first pin and the second pin by an arm side holding portion for holding the first pin and a link side holding portion for holding the second pin. The weight for adjusting the axial load is attached to the arm and the link member indirectly. The weight for adjusting the axle load according to any one of claims 1 to 3,
Running posture detection means for detecting the posture of the weight for adjusting the axial load relative to at least the arm;
Traveling posture determination means for determining whether or not the posture of the axle load adjusting weight detected by the traveling posture detection means is a posture satisfying a regulation of vehicle inspection;
A wheel-type work vehicle, comprising: a notifying means for notifying that when the running posture determining means determines that the posture of the axle weight adjusting weight is not a posture satisfying a vehicle inspection regulation. In the wheel type work vehicle according to claim 4,
In the link member, when the cylinder rod of the hydraulic cylinder for driving the working tool is most extended, the weight for adjusting the axial load is arranged below the arm, and the cylinder rod of the hydraulic cylinder for driving the working tool is The shaft weight adjustment weight is configured to be disposed in front of the arm when it is most degenerated,
The travel posture detection means includes weight position detection means for detecting the posture of the weight for adjusting the axial load relative to the arm,
The travel posture determination means is when the weight position detection means detects that the axle load adjusting weight is disposed at a predetermined position above and in front of the link side attachment portion with respect to the arm side attachment portion. The wheel work vehicle is characterized in that it is determined that the posture of the weight for adjusting the axle load satisfies a vehicle inspection regulation.

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