JPH089872B2 - Working device for earthmoving vehicle - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a working device mounted on an earthmoving vehicle for use.

<Prior Art> Conventionally, a working device including a support body mounted on an earthmoving vehicle and a blade mounted on the support body has been widely used for snow removal work and the like. Among such working devices, there are those equipped with an angle mechanism or those equipped with an angle mechanism and a slide mechanism in order to deal with various work conditions and objects. In the working device including the angle mechanism, the blade is swung in the front-rear direction about a turning axis extending in the up-down direction. Further, in the working device including the angle mechanism and the slide mechanism, the blade is swung in the front-rear direction about the swivel axis extending in the up-down direction and is relatively moved laterally with respect to the support body.

<Disadvantages of Prior Art> However, in a working device including a conventional angle mechanism (in addition, a slide mechanism), this is because the blade cannot be vertically swung about a swivel axis extending in the front-rear direction. Therefore, there are the following problems to be solved. That is, when the tilt link of the earthmoving vehicle is operated during the blade angle work to change the front-rear angle (pitch angle, excavation angle) of the blade, the lower edge of the blade, that is, the cutting edge is inclined and it is substantially effective on a flat road surface. Not parallel to top. More specifically, for example, when the left end (or right end) of the blade is angled forward and the right end (or left end) of the blade is angled rearward, the tilt link of the earthmoving vehicle is operated to tilt it backward. And its left edge (or right edge) lower edge is located above the right edge (or left edge) lower edge, and the blade is inclined downward from the left edge (or right edge) to the right edge (or left edge). To do. When the tilt link is operated to tilt the blade forward in the above-mentioned state, the lower edge of the left end portion (or right end portion) is located below the lower edge of the right end portion (or left end portion), contrary to the above. However, the lower edge of the blade is inclined upward from the left end (or right end) toward the right end (or left end). Therefore, the angle of the blade can not be changed substantially during the angle work, and various conditions such as snow removal work (ice burn, stripping of compressed snow, or removal of damp or dry snow) Can't deal with it satisfactorily.

In order to solve the above problems, a working device including a tilt mechanism in addition to an angle mechanism and a slide mechanism is disclosed in, for example, Japanese Utility Model Laid-Open No. 47-17402. In this working device, a support, a fixed flange, a ring, a rotating plate, a sliding support, and the like are interposed between the carrier and the blade (excavation plate). The fixed flange and the ring have a cylindrical shape having a central axis of rotation extending in the front-rear direction, and the sliding support has a U-shaped cross section and is configured to project to the front of the rotating plate. That is, since these members require a relatively large space in the front-rear direction, the total length of the working device is lengthened forward and the weight balance is deteriorated. In other words, the blade becomes farther forward than the center of gravity of the work vehicle, which reduces the penetration force,
Therefore, workability deteriorates. Further, pitching is likely to occur during work, and it becomes difficult to evenly shape a road surface or the like.

<Object of the Invention> The present invention has been made on the basis of the above facts, and its main object is to provide a tilt mechanism in addition to an angle mechanism and a slide mechanism, while being able to reduce the total length of a working device. To provide a working device for an earthmoving vehicle.

<Means for Solving and Actions Thereof> According to the present invention, a support body mounted to the front end of an earthmoving vehicle and a first swing center axis extending vertically in the front end portion of the support body are freely rotatable. A mounted first support, a second support mounted so as to be rotatable about a second swing center axis extending in the front-rear direction with respect to the support body and the first support; A working blade mounted laterally movably on the second support, and a support body and the first support for pivoting the first support about the first pivot axis. A fluid pressure cylinder mechanism for angles that is interposed between
A tilting fluid pressure cylinder mechanism interposed between the support body and the second support for pivoting the second support about the second pivot axis, and the blade in the lateral direction. A slide fluid pressure cylinder mechanism interposed between the second support and the blade for moving the first support and the second support, and the first support and the second support extend in the lateral direction, respectively. The main body plate of the second support body is provided adjacent to each other, and arcuate guide grooves extending in the vertical direction are formed at both ends of the main body plate of the second support body. Both ends are formed in an arc shape extending in the vertical direction and are slidably received in the guide grooves of the second support, respectively, and are spaced apart in the vertical direction from the main body plate of the second support in the lateral direction. A pair of guide grooves extending to the A pair of guided rails that extend in the lateral direction at intervals in the vertical direction are formed on the back surface of the card, and the pair of guided rails are slidably received in the pair of guide grooves, respectively. An earthworking vehicle working device is provided.

Since the present invention is configured as described above, the working blade can be swung about the first swivel center axis extending in the vertical direction by the action of the angle fluid pressure cylinder mechanism. The working blade can be slid laterally by the action of the cylinder mechanism. Furthermore, in addition to the above-mentioned effects, the working blade can be swung about the second swivel center axis extending in the front-rear direction by the effect of the tilting fluid pressure cylinder mechanism. This allows the lower edge of the blade to be adjusted substantially parallel to a flat road surface or the like even if the front-rear angle of the blade is changed during the angle work of the blade, so that it is possible to sufficiently satisfy a wide range of working conditions. be able to.

Further, in the above-described present invention, the first support and the second support each include a body plate that extends laterally and is adjacently arranged in the front-rear direction, and in that state,
The second support is pivotable about a second pivot axis extending in the anteroposterior direction with respect to the first support, and the blade is laterally slidable with respect to the second support. With this configuration, the distance between the front end of the support body and the blade is significantly shortened, and the total length of the working device can be kept short in spite of the addition of the tilt mechanism. The penetrating force is maintained, and therefore workability is also maintained. Also, pitching during work is less likely to occur, and the road surface and the like can be shaped evenly.

<Preferred Specific Example of the Invention> A specific example of a working apparatus configured according to the present invention will be described below with reference to the accompanying drawings.

1 and 2, the illustrated working device includes a support main body 2 mounted on the front end of an earthmoving vehicle such as a loader and a first working body.
The support 4, the second support 6 and the blade 8 are provided. The support body 2 has a substantially triangular shape, and a pair of plates 10a and 10b projecting rearward are provided at both ends of the rear end portion thereof. The support body 2 is mounted on an earthmoving vehicle as required through a quick coupler 12 which is known per se. The illustrated quick coupler 12 is composed of a hook 14 provided on the upper ends of a pair of plates 10a and 10b, and a hitch 16 that is detachably engaged with the hook 14, and the hitch 16 is a lift arm 18 of an earthmoving vehicle and It is connected to the tilt link 20 as required.

Referring also to FIG. 3 and FIG. 4, the first support 4 is arranged in the lateral direction (the direction perpendicular to the paper surface in FIGS. 1 and 3, the vertical direction in FIG. 2 and the lateral direction in FIG. 4). ) Is provided with an elongated body plate 22, and an upper plate 24 and a lower plate 26 extending in the lateral direction are provided at the upper and lower ends of the back surface of the body plate 22.

The first support 4 is connected to the support body 2 as follows. An inverted L-shaped bracket 28 extending upward and projecting forward is provided at the center of the front end of the support body 2, and a pair of brackets projecting forward is provided on the front surface thereof.
30 are provided. On the other hand, a boss 32 is provided between the upper plate 24 and the lower plate 26 of the first support 4. Then, the pair of brackets 30 in the support body 2
By locating the upper plate 24 and the lower plate 26 on the first support 4 in between and then mounting the connecting pin 34 through these brackets 28 and 30 and the upper plate 24, the lower plate 26 and the boss 32, One support body 4 is mounted rotatably in the front-rear direction indicated by arrows 36 and 38 (FIG. 2) around a connecting pin 34 (which constitutes a first pivot center axis extending in the vertical direction). A pair of angle fluid pressure cylinder mechanisms 40a and 40b are interposed between the first support body 4 and the support body 2. For example, one side 40a of a pair of fluid pressure cylinder mechanisms, which can be composed of hydraulic cylinder mechanisms, has its cylinder side rotatably connected between a pair of brackets 42 provided on the left side of the support body 2, and its rod side has a first side. It is rotatably connected between a pair of brackets (not shown) provided at the left end of the first support 4 (Fig. 3). Also, the other fluid pressure cylinder mechanism
The cylinder 40b is pivotally connected between a pair of brackets (not shown) provided on the right side of the support body 2 on the cylinder side, and the pair of rods 40b is provided on the right end of the first support 4 on the rod side. The brackets 45 (FIGS. 3 and 4) are pivotally connected to each other (the fluid pressure cylinder mechanism 40b is omitted in FIG. 4).

The second support 6 also comprises an elongated body plate 46. The body plate 46 extends in the lateral direction on the front side of the first support body 4, and in a specific example, the lower end portion thereof is connected to the support body 2 and both end portions thereof are connected to the first support body 4. It is slidably received in a defined pair of guide grooves 48 (see in particular FIGS. 4 and 5). To explain further,
A mounting bracket 50 is attached to the lower end of the center of the second support 6 on the back surface of the body plate 46 in the longitudinal direction. A pair of support sleeves 52 are fixed to the mounting bracket 50 at intervals in the vertical direction, and a trunnion 54 is rotatably mounted between the pair of support sleeves 52.
On the other hand, the lower end of the support body 2 is provided with plates 56 and 58 at intervals in the front-rear direction (the left-right direction in FIGS. 1 to 3 and the direction perpendicular to the paper surface in FIG. 4). A pivot pin 60 is rotatably mounted between the plates 56 and 58. One end of the pivot pin 60 penetrates the plate 58 and projects forward, and the other end penetrates the plate 56 and projects rearward, and the other end of the pivot pin 60 is pulled out to prevent the pivot pin 60 from coming off. A stop member 61 is attached. The central portion of the trunnion 54 of the second support 6 and one end of the pivot pin 60 of the support 2 are pivotally connected via a pin 62 extending in the lateral direction. Therefore, the second support body 6 and the support body 2 are vertically arranged around the pivot pin 60 (which constitutes the axis line extending in the front-rear direction) and the pin 62 (which constitutes the axis line extending in the lateral direction). In the front-back direction, with
Further, the trunnion 54 (which constitutes the above-mentioned axis extending in the vertical direction) is pivotally connected in the front-rear direction. In addition, a pair of guide grooves 48 (a pair of guide grooves 48) are formed on the rear surface of both ends of the second support 6 as shown in an enlarged view in FIG.
Are defined in substantially the same manner, and in FIG. 5, only one of the second support bodies 6 defined at the right end is shown). That is, a plate 64 is provided on the rear surface of the body plate 46.
Is fixed, and a tapping plate 66 is fixed to the outer side portion of the plate 64 extending in the longitudinal direction. After the outer plate 70 is positioned on the back surface of the tapping plate 66 via the shim member 68, the outer plate 70 and the shim member 68 are positioned.
The guide groove 48 is defined between the plate 66 and the outer plate 70 by screwing the bolt 72 onto the tapping plate 66 via the guide groove 48. The inner surfaces of the pair of guide grooves 48 are open,
Its bottom surface extends vertically in an arc shape (see also FIG. 4). Both end edges of the main body plate 22 of the support body 4 of FIG. 1 are formed in an arc shape corresponding to the bottom shape of the pair of guide grooves 48, and the both end portions are vertically movable in the pair of guide grooves 48, respectively. Accepted by. In addition, as described later, the first
Even when the second support body 6 pivots in the vertical direction with respect to the support body 4 of FIG.
Both ends of the body plate 22 project downward as compared with the central portion so that the 48 is sufficiently engaged (see FIG. 4). First
In connection with the support body 4 and the second support body 6 of FIG. 1 being slidable, the connecting pin 34 (first pivot axis) and the trunnion 54 (vertical axis) are moved up and down. Aligning with the direction, one turning center axis line that is substantially linear is formed. Since the second support body 6 is mounted as described above, the plate 66 and the outer plate defining the guide groove 48 are formed.
By the action of 70, the pivoting movement of the second support 6 with respect to the first support 4 about the pin 62 and the pivoting movement of the trunnion 54 about the first support 4 are surely prevented, and thus the first support 4 moves in the arrow direction. When it is swung in the direction indicated by 36 (or 38) (FIG. 2), the second support body 6 is also swung integrally therewith with the axis extending in the vertical direction as the center. On the other hand, since the both ends of the main body plate 22 are slidably received in the pair of guide grooves 48, the second support member 6 has the pivot pin 60 (the second pivot center axis extending in the front-rear direction). (Also configured)) as a center, and is vertically rotatable relative to the first support body 4. It should be noted that the action of the connecting pin 34 reliably prevents relative pivoting movement of the first support 4 with respect to the support body 2 about the axis extending in the lateral direction, so that the first support 4 and the second support 4 The support 6 does not rotate integrally with the pin 62.

Between the support body 2 and the second support body 6, a tilting fluid pressure cylinder mechanism 78 for turning the second support body 6 in the directions shown by arrows 74 and 76 (FIG. 4) is interposed. There is. The output rod 80 of the fluid pressure cylinder mechanism 78, which may be composed of a hydraulic cylinder mechanism, is rotatably connected to a mounting bracket 84 provided at the right end of the second support body 6 via a pin 82, and its cylinder side is The connecting pin 34 is connected to the upper end of the connecting pin 34 so as to be pivotable about its central axis and somewhat vertically about an axis substantially perpendicular to the central axis. The fluid pressure cylinder mechanism 78
In order to hold the cylinder side of the connecting pin 34 at a required position, a sleeve-shaped upper spacer 86 and a lower spacer 88 are fitted on the connecting pin 34, and the upper spacer 86 and the lower spacer 88 between the connecting pin 34 are The above-mentioned cylinder side is connected to the above-mentioned part as required. Fluid pressure cylinder mechanism for tilt
By connecting one side of the 78 (cylinder side in the specific example) to the connecting pin 34 as in the specific example, the gap between both connecting portions of the fluid pressure cylinder mechanism 78 can be maintained even when the blade 8 is angulated as described later. Virtually unchanged,
Therefore, no external force acts on the tilting fluid pressure cylinder mechanism 78 at the time of the angle.

Further, the blade 8 has a curved front board 90 which acts as a work surface, and a cutting edge 92 is provided at the lower end of the front board 90 over substantially the entire width. The blade 8 is mounted on the front side of the second support 6 so as to be movable in the lateral direction. In the specific example, the second support 6
An upper guide groove 94 and a lower guide groove 96 are defined on the front surface of the main body plate 46 at substantially the same intervals as those shown in FIG. 5 (see FIGS. 2 to 4). Figure). That is, the upper support plates 98 protruding upward are fixed to the front surfaces of both ends of the main body plate 46, and the tapping plates 100 are fixed to the front surfaces of the upper support plates 98, respectively.
An outer plate 104 is positioned on each tapping plate 100 via a shim member 102, and the outer plate 104 and the shim member are positioned.
By screwing bolts 106 onto tapping plate 100 through 102, upper support plate 98 and outer plate 10
A guide groove whose lower surface is open is defined between the four. The pair of guide grooves are aligned in the lateral direction to form an upper guide groove 94 extending in the lateral direction. Further, lower support plates 106 projecting downward are also provided on the front surfaces of both ends of the main body plate 46, and the tapping plates 108 are fixed to the front surfaces of the lower support plates 106, respectively. An outer plate 112 is attached to each tapping plate 108 via a shim member 110.
Is positioned and the bolt 114 is screwed into the tapping plate 108 through the outer plate 112 and the shim member 110 to define a guide groove having an open upper surface between the lower support plate 106 and the outer plate 112. There is. The pair of guide grooves are also aligned in the lateral direction to form a lower guide groove 96 extending in the lateral direction. On the other hand, a substantially L-shaped elongated upper member 116 and lower member 118 are provided on the upper and lower ends of the back surface of the blade 8.
The upper guided rail 120 and the lower guided rail 122 are provided on the upper surface of the upper member 116 and the lower surface of the lower member 118, respectively. The upper guided rail 120 and the lower guided rail 122 extend over almost the entire width of the blade 8 in the longitudinal direction,
The upper guided rail 120 is in the upper guide groove 94 defined in the second support body 6, and the lower guided rail 122 is in the second support body 6.
It is received in the lower guide groove 96 defined in 1 above so as to be slidable in the lateral direction. In the specific example, the tapping plate is used so that the above-described sliding of the blade 8 is smoothly performed.
A bearing 124 acting on the upper surface of the upper guided rail 120 is arranged between 100 and the shim member 102, and a bearing 126 acting on the lower surface of the lower guided rail 122 is provided between the tapping plate 108 and the shim member 110. It is arranged.

A fluid pressure cylinder mechanism 128 for sliding (FIG. 3) for moving the blade 8 in the lateral direction is interposed between the second support 6 and the blade 8. Fluid pressure cylinder mechanism 12 that can be composed of hydraulic cylinder mechanism 12
A rod side of 8 is rotatably connected between a pair of brackets 130 provided on the front surface of the main body blade 46 of the second support body 6, and a cylinder side thereof is provided on a rear surface of the blade 8 with a pair of brackets (not shown). ) Is connected so that it can rotate freely.

The illustrated working apparatus further includes a sled 132, and the sled 132 is disposed at both ends of the back surface of the main body blade 22 in the first support body 4 (see the sled 132 in FIGS. 3 and 4). Abbreviated). The sled 132 may have a configuration known per se.

The working effects of the working device having the above-described configuration are as follows.

To make the blade 8 angling, one fluid pressure cylinder mechanism 40a for angle is contracted (or extended) and the other fluid pressure cylinder mechanism 40 for angle is used.
It suffices if b is expanded (or contracted). As a result, the first support 4 is swung with respect to the support body 2 about the connecting pin 34 (first swivel center axis), and the second support 6 and the second support 6 are formed integrally with the first support 4. The blade 8 is also swiveled in the same manner, so that the working blade 8 has an arrow 36 (or 38).
The angling is performed in the direction shown in (Fig. 2) as required (in Fig. 2, the case of angling in the direction shown by the arrow 36 is shown by a chain double-dashed line).

To slide the blade 8, the fluid pressure cylinder mechanism 128 for sliding may be extended (or contracted). Thus, the blade 8 is slid laterally along the upper guide groove 94 and the lower guide groove 96 with respect to the second support body 6, and thus the working blade 8 is, for example, the arrow 134 (or 136) (see FIG. 2). ) Is slid as required in the direction indicated by (). (In FIG. 2, the blades are moved in the directions indicated by arrows 36 and 1 in the state in which the blades are made to hang in the direction indicated by arrow 36).
The part indicated by the chain double-dashed line when moved in the direction indicated by 36).

In order to tilt the blade 8, the tilting fluid pressure cylinder mechanism 78 may be expanded (or contracted). As a result, the second support 6 is pivoted with respect to the support body 2 about the pivot pin 60 (second pivot axis) in the direction indicated by the arrow 74 (or 76) (Fig. 4), and thus the work is performed. The blade 8 pivots integrally with the second support 6 and is tilted as required. At this time,
The first support 4 does not pivot in the direction indicated by the arrow 74 (or 76), and both ends of the main body plate 22 of the first support 4 are guide grooves defined by both ends of the second support 6. Move relatively within 48. Thus, when tilted, as can be easily understood from FIG. 4, the right end portion (or left end portion) of the blade 8 is
Moves downward and its left end (or right end) moves upward, and the tilt link 20 of the earthmoving vehicle is operated to change the front-rear angle of the blade 8 so that the lower edge of the blade 8 (lower edge of the cutting edge 92). Even if the vehicle is inclined, the inclination can be compensated as required and the lower edge can be made substantially parallel to a flat road surface or the like.

The fluid pressure cylinder mechanisms 40a, 40b, 78 and 128 can be expanded and contracted by utilizing the fluid pressure from a fluid pressure source such as the hydraulic pressure source of the earthmoving vehicle.

Since the working device 2 as described above is provided with the tilt mechanism in addition to the angle mechanism and the slide mechanism, it can satisfactorily deal with a wider range of conditions than the conventional one.

Further, the first support body 4 and the second support body 6 are composed of plate-shaped body plates 22 and 46, and the tilting fluid pressure cylinder mechanism 78 is interposed between the support body 2 and the second support body 6. Since the work device 2 is used, the length of the working device 2 in the front-rear direction can be shortened and the weight of the entire working device 2 can be reduced.

Although one specific example of the working apparatus configured according to the present invention has been described above, the present invention is not limited to this specific example, and various modifications and corrections can be made without departing from the scope of the present invention. is there.

For example, in a specific example, a pair of guide grooves 48 are provided at both ends of the second support body 6, and both end portions of the main body plate 22 of the first support body 4 are slidably received in the pair of guide grooves 48. However, on the contrary, a pair of guide grooves is provided at both ends of the first support body 4, and both end portions of the second support body 6 are slidably positioned in the pair of guide grooves. May be.

Further, for example, in the specific example, the support body 2 is attached to the front end of the earthmoving vehicle via the quick coupler 12, but the invention is not limited to this, and the support body 2 is directly attached to the earthmoving vehicle. It can be similarly applied to the one having the form.

<Effects of the Invention> According to the working apparatus of the present invention, the working apparatus can be shortened in total length while having the tilt mechanism in addition to the angle mechanism and the slide mechanism.

Since the working apparatus of the present invention is provided with the tilt mechanism in addition to the angle mechanism and the slide mechanism, even if the front-rear angle of the blade is changed during the angle work of the blade, the lower edge of the blade is set against a flat road surface or the like. Since they can be adjusted substantially parallel to each other, they can satisfactorily correspond to a wide range of working conditions.

Furthermore, the distance between the front end of the support body and the blade is significantly shorter than the conventional device, and the total length of the working device can be kept short in spite of the addition of the tilt mechanism, which has a substantial effect on the weight balance. , The predetermined penetration force is maintained, and workability is also maintained satisfactorily. Also, pitching during work is less likely to occur, and the road surface and the like can be shaped evenly.

[Brief description of drawings]

FIG. 1 is a side view showing a specific example of a working apparatus constructed according to the present invention. FIG. 2 is a plan view of the working device shown in FIG. FIG. 3 is a sectional view showing a part of the working device shown in FIG. FIG. 4 is a cross-sectional view showing the right portion of the working device of FIG. 1 viewed from the back side. FIG. 5 is a sectional view taken along the line VV in FIG. 2 ... Support body 4 ... 1st support body 6 ... 2nd support body 8 ... Blade 22 ... Body plate 34 ... Connecting pin (1st rotation center axis line) 40a and 40b ... For angles Fluid pressure cylinder mechanism 46 …… Body blade 60 …… Pivot pin (second pivot axis) 78 …… Tilt fluid pressure cylinder mechanism 128 …… Slide fluid pressure cylinder mechanism

Claims (1)

[Claims] 1. A support body mounted on the front end of an earthmoving vehicle,
A first support body mounted on the front end of the support body so as to be rotatable about a first swing center axis line extending in the vertical direction; and a first support body extending in the front-rear direction with respect to the support body and the first support body. 2nd mounted so as to be freely rotatable around the center axis of rotation of 2
Support body, a working blade laterally movably mounted on the second support body, the support body and the support body for rotating the first support body around the first rotation center axis. First
Fluid pressure cylinder mechanism for angle interposed between the support body and the second support body for swinging the second support body around the second swing center axis line. A tilting fluid pressure cylinder mechanism interposed between the second supporting member and the blade for moving the blade in the lateral direction. Each of the first support body and the second support body includes a body plate extending laterally and adjacently arranged in the front-rear direction, and extends vertically in both ends of the body plate of the second support body. An arc-shaped guide groove is formed, and both ends of the main body plate of the first support body are formed in an arc shape extending in the vertical direction and are slidably received in the guide grooves of the second support body, respectively. 2 upper and lower on the body plate of the support A pair of guide grooves extending in the lateral direction are formed at intervals in the vertical direction, and a pair of guided rails extending in the horizontal direction are formed on the back surface of the blade at intervals in the vertical direction. Are respectively slidably received in the pair of guide grooves, respectively.