JPS60181408A - Blade for civil engineering vehicle - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field The present invention relates to a blade for an earthmoving vehicle as a working device mounted on the earthmoving vehicle.

<Prior Art> Generally, when removing snow that has accumulated on a road or the ground, a blade is attached to an earthmoving vehicle (for example, a wheeled loader) as a working device, and the earthmoving vehicle is used as a snow removal machine. During snow removal work, drivers are unable to spot snow-covered obstacles because they are covered with snow, such as roadside curbs, utility poles, and large stone manhole covers on the ground. Therefore, during snow removal work, a part of the blade (especially the cutting edge fixed to the blade body) that is attached to the earthmoving vehicle accidentally collides with an obstacle on the road, causing damage to the blade (especially the cutting edge). There have been many accidents that have deformed or damaged the hydraulic cylinder mechanisms of earthmoving vehicles.

Therefore, in order to eliminate the above-mentioned accidents, various improvements have been made to the blade so that when a large impact is applied to the blade, it is configured to buffer the impact, which has been proposed and put into practical use. Examples of improved blades include blades that are configured so that the entire blade including the blade body and cutting edge moves back and forth or reversely upon impact, and blades that are configured so that the entire blade including the blade body and cutting edge moves back and forth or reversely due to impact, and blades that are configured to move the entire blade (or part of the blade) attached to the blade body. ) moves up and down or reverses against the force of the suspension ring due to impact, etc. However, in these cases, when the entire blade is moved, the structure becomes larger and it becomes difficult to move during work. If the cutting edge is moved, the cutting edge is held in a working state by the action of a spring.
It is difficult to resist large forces and the blade may swing during operation.

<Object of the Invention> The object of the present invention is to provide a further improved method that can reliably hold a cutting edge in a working state and can reliably buffer a large impact when it is applied to the cutting edge. To provide a blade for an earthmoving vehicle with a simple configuration.

<Summary of the Invention> According to the present invention, in order to achieve the above object, there is provided a cutting edge which includes a blade main body mounted on an earthmoving vehicle and a cutting edge fixed to the lower end thereof.

an edge support, one end of which is pivotably connected to the cutting edge support about a first axis extending laterally to the blade body, and the other end pivoting about a second axis extending laterally to the cutting edge support; a tension bolt mechanism for holding the cutting edge support in a working state by means of a tension bolt interposed between the blade body and the cutting edge support; When an impact is applied to cause the unit to rotate in a predetermined direction about the second axis, the impact acts on the tension bolt of the tension bolt mechanism, and if the impact force caused by the impact is large, the The tension bolt is severed and the cutting edge is pivoted together with the cutting edge support about the first axis and the second axis, so that the impact is dynamically damped. A blade for an earthmoving vehicle is provided.

<Preferred Embodiments of the Invention> Hereinafter, preferred embodiments of the earthmoving vehicle blade constructed according to the present invention will be described with reference to the accompanying drawings.

In FIG. 1, which is a bottom view of a part of the blade for an earthmoving vehicle, the blade 2 for the illustrated earthmoving vehicle includes a blade body 4, a cutting edge support 6, and a cutting edge that are attached to the front end of an earthmoving vehicle (not shown). It is equipped with 8. As understood from FIG. 1, the cutting edge support 6 and the cutting edge 8 extend in the lateral direction of the earthmoving vehicle blade 2 (in the left-right direction in FIG. 1, in the direction perpendicular to the plane of the paper in FIGS. 2 to 4). It is divided into two parts, and a cutting edge 8 is fixed to the lower end of each cutting edge support 6 (in FIG. 1, the left half of the earthmoving vehicle blade 2 is shown, and the cutting edge support 6 located on the left side is and cutting edge 8 and cutting edge support 6 located on the right side
and a part of the cutting edge 8 (ie, the left end). In the following description, the configuration of the left half of the earthmoving vehicle blade 2 will be explained, but the configuration of the right half is substantially the same as the configuration of the left half.

Referring further to FIGS. 2-4 in conjunction with FIG. 1, the blade body 4 includes a blade body portion 10 having a concave curved front surface. The cutting edge support 6 is attached to the blade body 4 in the following manner. The cutting edge support 6 is equipped with a plate body 12, and a pair of plates 1 are provided on the back side of the plate body 12.
Mounting brackets 18 consisting of 6 (in the specific example, 4 are arranged on one of the pluto main bodies 12) are fixed at intervals. On the other hand, at the rear end of the bottom surface of the blade main body 10 of the blade main body 4, there are mounting brackets 22 (four provided on the left half of the blade main body 10 corresponding to the mounting brackets 18 described above) consisting of a pair of plates 20. ) are fixed at intervals. One end of a connecting member 26 is rotatably connected between the plates 20 of each of the mounting brackets 22 via a connecting pin 24, respectively. The other end of the connecting member 26 is pivotally connected between the plates 16 of the mounting bracket 18 via a connecting rod 28 extending laterally. The connecting rod 28 has one end fixed to the end plate 27 fixed to the inner end of the plate body, and the other end connected to a mounting bracket 8 disposed at the left end (therefore, the right end in FIG. 1).
The mounting bracket 18 extends laterally through the plate 16 of a mounting bracket 18 disposed at an intermediate portion of the plate body 12 at its intermediate portion. In the illustrated example, a portion of the plate body 12 is provided with an opening as shown in FIGS. 2 and 3 (as shown in FIGS. 2 and 3).
9 is formed. As described above, the cutting edge support 6 is pivotable with respect to the blade body 4 together with the connecting member 26 around the central axis of the connecting pin 24 (constituting the first axis extending in the lateral direction). At the same time, the connecting member 26 is centered on the central axis of the connecting rod 28 (constituting a second axis extending in the lateral direction).
(See also FIG. 5).

Further, a locking iron 30 extending in the lateral direction is fixed to the upper end of the back surface of the plate main body 12 of the cutting edge support 6 described above. To explain further, the illustrated locking rod 30 is composed of two rod members, one end of which is connected to the end plate 27 of the plate body 12.
The other end is fixed to a mounting block 46 (described later) fixed to the plate main body 12, and the middle part is fixed to the upper rear end of the plate main body 12 and the mounting bracket 18.
is fixed to the upper end of the plate 16.

The other rod member has one end connected to the mounting block 4.
6 (described later), the other end is fixed to the upper end of the plate 16 located outside the mounting bracket 18 disposed at the left end, and the middle part is fixed to the upper end of the back surface of the plate body 12 and the mounting bracket 18. It is fixed to the upper end of the plate 16. As such, the locking rod 30, which is a rod member, extends laterally over substantially the entire width of the plate body 12. On the other hand, receiving portions for receiving the locking rods 30 are defined at the lower end of the blade body 4 at intervals in the lateral direction. In a specific example,
At the front of the bottom surface of the blade main body 10 of the blade main body 4 in the front-rear direction (in the vertical direction in FIG. 1, in the direction perpendicular to the plane of the paper in FIGS. 2 to 4), receiving members 32 are provided at intervals in the lateral direction. (As shown in FIG. 1, there are four provided on the left half of the blade main body lO) are fixed. The three receiving members 32 (excluding the receiving member 32 disposed at the left end of the plate body 12) are composed of a pair of plates 36, and correspond to each of the other mounting brackets 22 except for the mounting bracket 22 located on the outside. And the pair of plates 20
are placed on both sides. Also, one remaining receiving member 32
is composed of a single plate 37, and is disposed at the left end of the plate body 12 in correspondence with the mounting bracket 18 located at the left end. As shown in FIGS. 2 and 3, each of the plates 36 and 37 is formed with a recess 38 that defines a receiving portion that is open to the front.

In connection with the locking rod 30 fixed to the plate body 12 and the receiving part defined in the blade body 4, there is a gap between the blade body 4 and the cutting edge support 6 as shown in FIGS. 1 and 4. Like, tension bolt mechanism 42
is mediated. Although the tension bolt mechanism 42 may be disposed at the end of the cutting edge support 6, it is preferably disposed approximately at the center in the lateral direction of the plate body 12 of the cutting edge support 6 as shown.

Referring to FIG. 4, the tension bolt mechanism 42 includes a tension bolt 44, and a shaft portion 44a of the tension bolt 44 has a V-shaped notch 44b formed around it. This tension bolt 44 is interposed between the blade body 4 and the cutting edge support 6, and holds the cutting edge support 6 in the working condition shown in FIGS. 1 to 4. To explain further, the plate body 12
A mounting block 46 is fixed to the upper end of the rear surface at the center in the lateral direction, and this mounting block 46 has a through hole 48.
is formed. The rear upper end of the mounting block 46 is formed into an arc shape.

Additionally, a mounting block 50 is provided on the bottom of the blade main body 10.
is fixed, and a through hole 52 is also formed in this mounting block 50. Then, the tension bolt 44 mentioned above
The through hole 48 of the mounting block 46 and the mounting block 5
The nut 56 is attached as required by threading the nut 56 through the through hole 52 of 0 to the male screw portion formed at one end of the shaft portion 44a via the washer 54. As shown above, the above cutting edge support 6
The tension 7j of the tension bolt mechanism 42, the bolt 44, the connecting rod 28, the connecting member 26, and the connecting bottle 2
4, it is held in the above-mentioned working state.

In such a working state, as is clear from FIG. received in the recess 38,
In this way, the cutting edge support 6 is reliably held in the above-mentioned working condition. As shown in FIG. 4, the tension bolt 44 is installed so that its axis is substantially perpendicular to the direction in which the cutting edge support 6 is rotated about the connecting rod 28 in the working state. It is preferable to

As described above, the cutting edge 8 is fixed to the cutting edge support 6 attached to the blade body 4. A plurality of holes are formed at the lower end of the main body 12 at intervals in the lateral direction, and a plurality of holes are formed at intervals in the width direction at the vertically intermediate portion of the cutting edge 8. , the cutting edge 8 is fixed to the lower end of the front surface of the main body 12 by a plow bolt 58 and a nut 60 inserted through these holes. It protrudes further downward beyond the lower end.

In the blade 2 having the blade body 4, the cutting edge support 6, and the cutting edge 8 configured as described above, a guide means 62 is further provided on the bottom surface of the blade body 10 (see FIGS. 1 and 3). reference). The guide means 62 has a pair of guide plates 64 that are disposed corresponding to each of the connecting members 26 except for the connecting members 26 located on the outside and that hang downward from the bottom surface of the blade body 10. . Each of the pair of guide plates 64 is disposed on both sides of the connecting member 26.

Therefore, the guide means 62 guides the connecting member 26 when it is pivoted, as will be described later.

Further, an elastic buffer means 6 is provided on the bottom surface of the blade main body 10.
6 (see FIGS. 1 and 3). The renal shock absorbing means 66 is connected to the connecting member 2 guided by the guiding means 62.
6, and includes an elastic buffer member 68 made of, for example, synthetic rubber. The elastic buffer member 68 is fixed at both ends to the blade body 10 by screwing a mounting hole 70 onto a boss 72 (FIG. 4) provided on the bottom surface of the blade body 10, as will be described later. When the connecting member 26 is pivoted in this manner, the connecting member 26 comes into contact with the intermediate portion of the elastic buffer member 68.

Further, a stop piece 74 is fixed to one end of each connecting member 26 guided by the guide means 62 (see FIGS. 1 and 3). The stop piece 74 has a contact surface that comes into contact with the rear end of the bottom surface of the blade main body 10, and the contact surface of the stop piece 74 contacts the cutting edge support 6.
When in the above-mentioned working state, the connecting member 26 comes into contact with the bottom surface of the blade body 10 to prevent the connecting member 26 from turning in a predetermined direction (counterclockwise in FIGS. 2 to 4).

Furthermore, an abutting piece 76 is fixed to the lower surface of each connecting member 26 guided by the guiding means 62 (
(See Figures 1, 3 and 4).

When the cutting edge support 6 is rotated as will be described later, the lower end of the back surface of the plate body 12 of the cutting edge support 6 comes into contact with the lower surface of the contact piece 76.

Next, with reference mainly to FIGS. 3 to 5, the effects of the earthmoving vehicle blade 2 having the above-described configuration will be described.

The blade 2 described above is attached to the front end of an earthmoving vehicle (not shown) and is used, for example, as a snow removal blade. A cutting disposed on the left side of the blade 2 by the forward movement of the earthmoving vehicle (progressing in the direction shown by arrow 78 in FIGS. 3 to 5) during work using the blade 2 (for example, snow removal work). The lower end of edge 8 is on the ground E (second
When the cutting edge supports 6, to which the cutting edge 8 is fixed, are moved around the central axis (second axis) of the connecting iron member 28, the cutting edge support 6 is moved in the direction indicated by the arrow 80 (the third axis). Predetermined directions shown in Figures 3 to 5 (counterclockwise in Figures 3 to 5)
An impact force (moment force) is generated that causes K to rotate, and this impact force acts on the tension bolt 44 of the tension bolt machine 842. When the impact force acting on the tension bolt 44 is large (specifically, the impact force is greater than the strength of the tension bolt 44), the tension bolt 44 is cut by the impact force.

In the illustrated example, since the tension bolt 44 is mounted so that its axis is substantially perpendicular to the direction of rotation of the cutting edge 6 in the working state, the impact force is applied to the tension bolt 44. This acts as a tensile force pulling in the axial direction, and the tension bolt 44 is cut by this tensile force. When the tension bolt 44 is cut, the notch 44b of the tension bolt 44 is cut, as is easily understood.

As described above, when the tension bolt 44 is cut, the holding function of the cutting edge support 6 (more specifically, the function of holding the cutting edge support 6 in the working state) is lost, and the cutting edge support 6 is It is pivotable about the central axis (second axis) of the connecting rod member 28 and the central axis (first axis) of the connecting pin 24. In the illustrated example, the cutting edge support 6 is in the working state. When held, the locking iron 30 fixed to the back surface of the plate body 12 is received in the receiving portion of the blade body 4 (recesses 38 formed in the plates 36 and 37), and is fixed to one end of the connecting member 26. Since the contact surface of the stop piece 74 is in contact with the bottom surface of the blade main body 10, when the tension bolt 44 is cut, the cutting edge support 6 moves in the predetermined direction shown by the arrow 80 (FIGS. 3 to 5). (counterclockwise in the figure)
The connecting member 26 can be rotated only in the direction indicated by the arrow 82 (FIGS. 3 to 5), which is the opposite direction to the predetermined direction.
It is possible to turn only in the clockwise direction (in the figure).

As the earthmoving vehicle moves further forward (in the direction shown by arrow 78) after the holding function is lost as described above, the cutting edge support 6 to which the cutting edge 8 is fixed will move as shown by the solid line in FIG. Arrow 80 (counterclockwise in FIGS. 3 to 5) centering on the connecting red 28
At the same time, the connecting member 26 is pivoted in the direction shown by arrow 28 (see FIG. (clockwise in FIG. 5). When the connecting member 26 is pivoted, the connecting member 26 is guided by a pair of guide plates 64. (If the amount of rotation of the connecting member 26 exceeds a predetermined value, the upper surface of the connecting member 26 will touch the elastic buffer member 62.
The impact caused by the connecting member 26 is buffered.

Further, as the earthmoving vehicle moves forward, the connecting member 26 is further rotated in the direction shown by the arrow 82 about the connecting pin 24 (as shown by the two-dot chain line in FIG. 5), and the cutting edge support 6 is moved toward the connecting rod. It is rotated in the direction shown by the arrow 80 about the member 28. When the cutting edge support 6 is rotated as described above and the amount of rotation of the cutting edge support 6 exceeds a predetermined value, the lower end of the back surface of the plate body 12 is rotated by the connecting member 26.
(The tip of the cutting edge 8 is prevented from coming into contact with the connecting member 26.) In this way, the tip of the cutting edge 8 is prevented from coming into contact with the connecting member 26.

In the above description, a case has been described in which an impact force is applied to the cutting edge 8 disposed on the left side of the blade 2, but an impact force is applied to the cutting edge 8 disposed on the right side of the blade 2. Substantially the same effect will occur in both cases. In this case, the tension bolt of the tension bolt mechanism provided at the right end of the blade 2 is cut.

In the blade 2, as is easily understood, by preparing several types of tension bolts with different strengths, the set load to be cut by the impact force can be changed as appropriate.

As described above, 1 In the blade 2 described above,
When a large impact force is applied to the cutting edge 8, the tension bolt 44 is cut, and the cutting edge 8 can freely rotate around the connecting pin 24 and the connecting rod 28 together with the cutting support 6, so that the impact force can be dynamically reduced. Thus, the blade 2 including the cutting edge 8 can be prevented from being deformed or damaged in the event of a collision.

In addition, in the blade 2, the tension bolt 4
When the earthmoving vehicle advances further after the cutting edge support 4 has been cut, the cutting edge support 6 is pivoted about the second axis and together with the connecting member 26 about the first axis (therefore, the cutting edge support 6 is pivoted about the first axis). Support 6
), it is possible to buffer the impact force caused by the thrust caused by the forward motion of the earth-moving vehicle, and it can be particularly advantageously applied to a type in which the blade 2 is attached to the earth-moving vehicle via a hydraulic cylinder mechanism. can.

Further, in the blade 2, the cutting edge support 6 is restrained in the working state by the tightening force of the tension bolt 44 of the tension bolt mechanism 42 and the nut 56, so that the cutting edge support 6 is reliably kept in the working state. Can hold the blade body 4
Also, the occurrence of so-called backlash between the cutting edge supports 6 can be prevented.

In addition, since the tension bolt mechanism 42 is adopted, 1
It is also possible to easily replace the tension bolt 44 when it breaks.

In addition, in the illustrated Blend 2I/c, the tension bolt mechanism 42 is disposed approximately in the center of the plate body 12 in the lateral direction, so even if an impact is applied to the end of the cutting edge 8, The absorption of the impact force due to the twisting action of the plate body 12 can be reduced, and the impact force can be reliably applied to the tension bolt 44, thereby reducing the strength of the cutting edge support 6. Although specific examples of the earthmoving vehicle blade configured according to the present invention have been described above, the present invention is not limited to such specific examples, and various modifications can be made without departing from the scope of the present invention. It is possible to modify it.

For example, although in the illustrated embodiment the cutting edge support and cutting edge are laterally divided into two halves, they may be divided into three or more horizontal halves, or may be undivided, if desired. However, the desired effect can be achieved.

[Brief explanation of the drawing]

FIG. 1 is a bottom view showing the left half of a blade for an earthmoving vehicle constructed in accordance with the present invention. FIG. 2 is a left side view of the blade in FIG. 1. FIG. 3 is a sectional view taken along the line lll-1■ in FIG. 1. FIG. 4 is a sectional view taken along the TV-TV line in FIG. 1. FIG. 5 is a diagram for explaining the effect when an impact force is applied to the blade of FIG. 1. 2... Blade for earthmoving vehicle 4... Blade body 6... Cutting edge support 8...
... Cutting edge 10 ... Blade body 12 ... Plate body 24 ... Connection bin 26 ... Connection member 28 ... Connection rod 42...Tension bolt mechanism 44...
・Tension bolt

Claims (1)

[Scope of Claims] 1. A blade body to be mounted on an earthmoving vehicle, a cutting edge support having a cutting edge fixed to the lower end thereof, and a first blade body having one end extending laterally to the blade body.
a connecting member pivotally connected to the blade body and the cutting edge support, the other end of which is pivotally connected to the cutting edge support about a second axis extending in the lateral direction; and a tension bolt mechanism for holding the cutting edge support in a working state by a tension bolt interposed between the cutting edge support and the cutting edge support, and for causing the cutting edge to pivot in a predetermined direction about the second axis. When an impact is applied, the impact acts on the tension bolt of the tension bolt mechanism, and if the impact force due to the impact is large, the tension bolt is severed and the core cutting edge is integrated with the cutting edge support into the third 1. A blade for an earthmoving vehicle, characterized in that the blade is pivoted about a first axis and a second axis, so that the impact is dynamically damped. 2. The cutting edge and the cutting edge support are divided into at least two parts in the lateral direction, and the tension bolt mechanism is interposed between each cutting edge support and the support body.
Blades for earthmoving vehicles as described in section. 36. The individual blade for a soft earthmoving vehicle according to claim 2, wherein the tension bolt mechanism is disposed approximately in the lateral center of each cutting edge support. 4. Claim 1, wherein the tension bolt is mounted such that its axis is substantially perpendicular to the pivoting direction in which the cutting support is pivoted about the second core axis in the working state. The earthmoving vehicle blade according to any one of items 1 to 3. 5. The upper end of the back surface of the cutting edge support is provided with a locking rond extending in the lateral direction, while the lower end of the blade body is provided with a receiving part that is open to the front and spaced apart in the lateral direction. 5. An earthmoving vehicle blade according to any one of claims 1 to 4, wherein the locking rod is received in the receptacle when the cutting support is held in the working condition.