JPS6118614B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a two-way blade for an earth-moving vehicle, and more particularly, to an earth-moving vehicle two-way blade, which is attached to an earth-moving vehicle and whose front or rear surface is selectively used as a working surface depending on the work to be performed. Regarding.

As a two-way blade that is attached to an earthmoving vehicle, the front side is used as a working surface when performing so-called pushing work, etc., and the rear side is used as a working surface when performing so-called pulling work or raking work, etc. Already published in Utility Model Publication No. 16451 and Utility Model Publication No. 16451.
Publication No. 25093, Publication of Utility Model Publication No. 1972-34961, Publication of Utility Model Publication No. 1973
As disclosed in JP-A-143101, JP-A-49-45504, JP-A-51-24003, JP-A-51-116001, etc., the blade body is divided into an upper part and a lower part, There is a known structure in which the lower end of the upper part and the upper end of the lower part are connected to each other so as to be rotatable, and the upper part and the lower part are relatively rotated to position them at a desired relative angular position. be. In such a known two-way blade, as described in the above-mentioned publication, when the front surface of the blade body is used as a working surface, the upper and lower parts are positioned at a required relative angle position and the upper and lower parts are The front surface of the blade body, which is defined by the cooperation of the front surfaces of The rear surface of the blade body defined by the cooperation of the rear surfaces of the upper and lower parts is turned into a concave curved surface suitable for pulling work or raking work, etc., and thus the front surface of the blade body can be used as a working surface. When carrying out pushing work using
When performing pulling work or raking work using the rear surface of the blade body as a work surface,
Each is intended to be able to perform the intended task fully and effectively.

However, in the above-mentioned known two-way blade, in addition to (a) rotatably connecting the upper and lower parts of the divided blade bodies to each other, the upper and lower parts of the blade bodies are relatively rotated to achieve the desired relative position. It is necessary to provide a rotational positioning mechanism for positioning the blade at an angular position, which results in a relatively complicated and expensive structure. (c) By relatively rotating the upper and lower parts of the blade body, the blade body may be damaged or damaged in a relatively short period of time due to collision with objects such as rocks. The front or rear surface of the blade body is intended to be a concave curved surface suitable for each task, but the curvature at the connection between the upper and lower parts is limited to a specific range. (d) When using the rear surface of the blade body as a working surface, the effective working surface is limited to a part of the rear surface of the blade body, resulting in the so-called There are various problems or drawbacks, such as the relatively small amount.

The present invention has been made in view of the above-mentioned circumstances, and its main purpose is to provide a new and superior two-way blade for earth-moving vehicles that is free from the above-mentioned problems and drawbacks found in known two-way blades for earth-moving vehicles. That's true.

According to the present invention, there is provided a blade body having a front board defining a concave curved front surface suitable for pushing work, etc., and a rear board defining a concave curved rear surface suitable for pulling work, raking work, etc., and both sides of the blade body. a pair of side plates fixed to the section, each of the pair of side plates each having a
It is rotatably connected to the tip of each of the pair of push arms or lift arms of the earthmoving vehicle, and is rotatably connected to the tip of each of the pair of tilt mechanisms of the earthmoving vehicle, and furthermore, at least one of the pair of side plates is On the other hand, when the pair of tilt mechanisms is tilted back to a required position in order to make the concave curved rear surface into a state suitable for carrying out raking work, at least one of the pair of push arms or lift arms is moved. at least one first stop surface abutting a third stop surface disposed thereon; At least one second stop surface is provided that comes into contact with a fourth stop surface provided on at least one of the pair of push arms or lift arms when the tilt mechanism is tilted forward to a desired position. A two-way blade for an earthmoving vehicle is provided.

Further, according to the present invention, there is provided a blade body having a front board defining a concave curved front surface suitable for pushing work, etc., and a rear board defining a concave curved rear surface suitable for pulling work, raking work, etc.; a pair of side plates fixed to both sides of the
Each of them is rotatably connected to the tip of a pair of push arms or lift arms of the earthmoving vehicle, and is rotatably connected to the tip of each of a pair of tilt mechanisms of the earthmoving vehicle, and further connected to the pair of side plates. When the pair of tilt mechanisms is tilted back to a required position in order to make it suitable for carrying out raking work using the concave curved rear surface, at least one of the pair of push arms or lift arms at least one abutting third stop surface disposed on one side;
The pair of push arms or at least one second stop surface abutting a fourth stop surface disposed on at least one of the lift arms;
A stop surface is provided on at least one of the pair of side plates or the blade body, and a first indicator piece is provided on at least one of the pair of side plates or the blade body, and a first indicator piece is provided on at least one of the pair of push arms or the lift arm or of the pair of tilt mechanisms. A second indicator piece is provided on at least one side, and the first indicator piece and the second indicator piece are configured to make the concave curved rear surface suitable for performing a pulling operation. A two-way blade for an earthmoving vehicle is provided, characterized in that the two-way blades are aligned with each other when positioned at a desired position by the action of a pair of tilt mechanisms.

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a two-way blade for an earthmoving vehicle constructed in accordance with the present invention will now be described in more detail with reference to the accompanying drawings.

Referring to FIGS. 1 and 2, a two-way blade for an earthmoving vehicle, generally designated by the number 2, includes a blade body 4. As shown in FIGS. This blade body 4 includes a front board 6 defining a concave curved front surface suitable for carrying out pushing operations, etc., and a rear board 8 defining a concave curved rear surface suitable for carrying out pulling operations, raking operations, etc. and has. In the illustrated example, the front board 6 and the rear board 8 of the blade body 4 have substantially the same shape, and the second
In the figure, they are positioned so as to be symmetrical with respect to the center plane extending in the vertical direction, and are therefore defined by the curvature of the concave curved front surface defined by the front surface of the front board 6 and the rear surface of the rear board 8. The curvature of the concave curved rear surface is substantially the same. Both end edges of a top plate 10 are fixed to the top ends of the front board 6 and the top ends of the rear board 8 by an appropriate method such as welding, and thus the top ends of the front board 6 and the top ends of the back board 8 are connected to the top plate 10. are firmly connected to each other via.

It is convenient that cutting edges 12 are preferably removably attached to the front lower end of the front board 6 and the rear lower end of the rear board 8, respectively. In the illustrated embodiment, as clearly shown in FIG. 2, mounting auxiliary plates 14 are provided on the rear surface of the lower end of the front board 6 and the front surface of the lower end of the rear board 8, respectively, and project downwardly beyond the lower ends thereof. are firmly fixed by a suitable method such as welding, and the cutting edge 12 is removably attached to the attachment auxiliary plate 14 by bolts 16 and nuts 18. Preferably, the head of the bolt 16 is housed in a circular recess formed in the surface of the cutting edge 12 so as not to interfere with the smoothness of the surface of the cutting edge 12.

The illustrated blade body 4 is further provided with a reinforcing intermediate plate 20 which is firmly fixed at one end to the rear surface of the front board 6 and at the other end to the front surface of the rear board 8 by an appropriate method such as welding. There is. Further, a bottom plate 22 is fixed between the lower end of the rear surface of the front board 6 and the lower end of the front surface of the rear board 8.
In the illustrated example, the bottom plate 22 is a front bottom plate firmly fixed by an appropriate method such as welding between the mounting auxiliary plate 14 fixed to the front board 6 and the reinforcing intermediate plate 20. 22a, and a rear bottom plate 22b firmly fixed between the mounting auxiliary plate 14 fixed to the rear board 8 and the reinforcing intermediate plate 20 by an appropriate method such as welding.

On both sides of the blade body 4 as described above,
A pair of side plates 23 are fixed. In the illustrated example, a pair of side plates 2
3 has a main side plate 24 fixed to the side end of the blade main body 4, and an auxiliary side plate 26 fixed somewhat inside the main side plate 24.
Preferably, a protection plate 28 made of a highly hard material is fixed to the lower end of the main side plate 24, which has a generally triangular shape as a whole. The auxiliary side plate 26 located across the concave curved front surface and the concave curved rear surface of the blade body 4 has substantially the same external shape as the main side plate 24 on the concave curved rear surface side of the blade body 4; As can be seen from FIG. 2, the concave curved front side of the blade exists only in the upper part of the blade body 4.

Next, a method of mounting the two-way blade 2, which includes the blade main body 4 and a pair of main side plates 24 and auxiliary side plates 26 as described above, on an earthmoving vehicle will be explained. The upper ends of the main side plate 24 and the auxiliary side plate 26 protrude upwardly and slightly forwardly beyond the upper end of the blade body 4, and between the upper ends of the main side plate 24 and the auxiliary side plate 26, the pin 27 is rotatably connected to the tip of each of a pair of tilt mechanisms of an earthmoving vehicle such as a dozer (or loader). Further, a portion of the main side plate 24 and the auxiliary side plate 26 that is located below the portion where the tip of the tilt mechanism is connected (i.e., between the upper end portions of the main side plate 24 and the auxiliary side plate 26) is connected to the pin 29. It is rotatably connected to the tip of each of a pair of push arms (or lift arms) of an earthmoving vehicle. In the illustrated case, the earthmoving vehicle (only a portion of which is shown) is a dozer, which includes a pair of push arms 30 and a hydraulic cylinder mechanism having a cylinder 32 and a rod 34, with the rear end of the cylinder 32 covered with a cover 36. The ends have a pair of tilt mechanisms 38 which are pivotally mounted to the push arm 30. The upper ends of the auxiliary side plates 26 of the main side plates 24 are rotatably connected to the tips of each of the pair of tilt mechanisms 38 (more specifically, to the tips of the rods 34). In addition, the main side plate 24
The upper half of the blade main body 4 is cut out between the main side plate 24 and the auxiliary side plate 26, and the part between the main side plate 24 and the auxiliary side plate 26 corresponding to a position slightly above the middle part of the blade main body 4 is cut out. It is rotatably connected to the tips of a pair of push arms 30.

In the illustrated example, the pair of push arms 30 are further provided with an outer surface and an inner surface, respectively.
A stop block 44 is provided having a first stop surface 40 and a second stop surface 42, and also on the outer surface of each of the pair of primary side plates 24 and the inner surface of each of the pair of auxiliary side plates 26, respectively. A first stop piece 48 having a stop surface 46 (constituting a third stop surface) and a second stop piece 52 having a stop surface 50 (constituting a fourth stop surface) are disposed on the stop surface 46 . There is. Furthermore, on at least one side, preferably both sides, of the two-way blade 2, the first indicator piece 54 attached to the main side plate 24 and the tip of the tilt mechanism 38 (more specifically, the rod 34
An indicator 58 is provided, which includes a second indicator piece 56 attached to the tip of the indicator. At least one of the first indicator piece 54 and the second indicator piece 56 constituting the indicator 58 adjusts the angle with respect to the main side plate 24 or the tip of the tilt mechanism 38, and thus the angle between the first indicator piece 54 and the second indicator piece 56 is adjusted. It is preferable that the two-way blade 2 be mounted so that the angle of the two-way blade 2 with respect to the push arm 30 when the two indicator pieces 56 match each other can be adjusted as appropriate.

In the illustrated example as described above, a total of four stop blocks 44 are disposed on each of the outer and inner surfaces of each of the pair of push arms 30,
Accordingly, a total of four first stop pieces 48 and a total of four second stop pieces 52 are provided on the main side plate 24 and the auxiliary side plate 26, but if desired, stop blocks can be installed. 44, the first stop piece 48, and the second stop piece 52 may each be reduced to one to three pieces. Also, the first stop surface 40 and the second stop surface 4 are connected by the stop block 44.
Although the two stop surfaces 40 and 42 are defined, the first stop surface 40 and the second stop surface 42 can also be defined by separate members. Furthermore, the first indicator piece 54 forming part of the indicator 58 may be attached to the auxiliary side plate 26 or the auxiliary side plate 26 instead of the main side plate 24 as long as it is located in a position where it can be easily seen by the operator of the earthmoving vehicle. The second indicator piece 56 can also be attached to the blade main body 4, and at the same time, the second indicator piece 56 can also be attached to the tip of the push arm 30 (or lift arm) instead of the tip of the tilt mechanism 38.

Next, the effects of the two-way blade 2 for earthmoving vehicles as described above will be explained.

The two-way blade 2 mounted on the earthmoving vehicle as described above is moved to its first position by the tilt back and tilt forward of the tilt mechanism 38 (in the illustrated case, the contraction and expansion of the hydraulic cylinder mechanism having the cylinder 32 and the rod 34). Two-dot chain line 2A in figure 2
Between the state shown by and the state shown by two-dot chain line 2B,
It is rotated around the tip of the push arm 30.

When the tilt mechanism 38 is tilted back to bring the two-way blade 2 into the state shown by the two-dot chain line 2A in FIG. 2, the first stop piece 4 fixed to the main side plate 24 and the auxiliary side plate 26
The stop surface 46 of 8 abuts the first stop surface 40 of a stop block 44 fixed to the push arm 30, thus preventing the two-way blade 2 from pivoting further clockwise in FIG.
When the two-way blade 2 is brought into the state shown by the two-dot chain line 2A in FIG. 2, the concave curved rear surface of the bucket main body 4 is used as a working surface, and the back movement of the earthmoving vehicle, etc. Therefore, it is possible to effectively perform a raking operation (for example, work to collect the object such as earth and sand piled up on an upright wall at a desired position while lowering it) on the object to be treated. During such work,
The load acting on the blade body 4 from the object to be processed is transferred to the main side plate 24, the auxiliary side plate 26, the first stop piece 48, and the stop block 4.
4 to the push arm 30, thereby preventing excessive load from acting on the tilt mechanism 38, and
Undesirable torsional stresses on the cross member (not shown) extending between the cross members are reduced. Therefore, the weight of the tilt mechanism 38, cross member, etc. can be reduced. Furthermore, as can be understood from FIG. 2 in particular, since the two-way blade 2 itself has a highly rigid structure, it can be made lighter than conventional blades.

When the tilt mechanism 38 is tilted forward and the two-way blade 2 is brought into the state shown by the two-dot chain line 2B in FIG. 50 abuts a second stop surface 42 of a stop block 44 fixed to the push arm 30, thus preventing the two-way blade 2 from further pivoting counterclockwise in FIG. Then, install the two-way blade 2 as shown in Figure 2.
When the state shown by the dotted chain line 2B is established, as can be understood from FIG. 2, the concave curved front surface of the bucket main body 4 is used as a working surface, and the forward movement of the earthmoving vehicle is effective against the objects to be treated, such as earth and sand. It can be rotated for pushing work etc. During such work, the load acting on the blade body 4 from the object to be processed is transferred to the main side plate 24 and the auxiliary side plate 2.
6. An excessive load is transmitted to the push arm 30 via the second stop piece 52 and the stop block 44, thereby preventing an excessive load from acting on the tilt mechanism 38, and a cross member extending between the pair of push arms 30 ( (not shown) is reduced.

On the other hand, due to the action of the tilt mechanism 38, the first indicator piece 54 attached to the main side plate 24 and the tip of the tilt mechanism 38 (more specifically, the rod 3
When the two-way blade 2 is positioned so that the second indicator piece 56 attached to the tip of the tip of the blade 4 coincides with the second indicator piece 56, the two-way blade 2 is positioned as shown in FIG.
The state is as shown by the dotted chain line 2C. When the two-way blade 2 is brought into the state shown by the two-dot chain line 2C in FIG. 2, as can be seen from FIG. Therefore, it is possible to effectively perform work on the object to be processed.

According to the two-way blade 2 for an earthmoving vehicle constructed according to the present invention as described above, the structure is relatively simple and therefore inexpensive, and the risk of breakage or damage is extremely low. It can be provided with a concave curved front surface that is most suitable for pushing work, etc., and a concave curved rear surface that is most suitable for pulling work, raking work, etc. Further, as can be understood from the two-dot chain lines 2A and 2C in FIG. The concave curved rear surface can be effectively used as a working surface over almost its entire height, and excellent effects such as the so-called pocket can be made sufficiently large are achieved.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing a specific example of a two-way blade for an earthmoving vehicle constructed according to the present invention.
FIG. 2 is a cross-sectional view of the two-way blade for the earth-moving vehicle shown in FIG. 1, and a diagram simply showing various states of the earth-moving vehicle using chain double-dashed lines. 2... Two-way blade for earthmoving vehicles, 4...
Blade body, 6... Front board, 8... Rear board, 12... Cutting edge, 23... Side plate, 24... Main side plate, 26...
... Auxiliary side plate, 30 ... Push arm, 38 ... Tilt mechanism, 44 ... Stop block, 48 ... First stop piece, 52 ... Second stop piece, 54 ... First indicator piece, 56 ...Second indicator piece, 58...Indicator.

Claims (1)

[Claims] 1. A blade body having a front board defining a concave curved front surface suitable for pushing work, etc., and a rear board defining a concave curved rear surface suitable for pulling work, raking work, etc.; a pair of side plates fixed to both sides, each of the pair of side plates is rotatably connected to the tip of each of the pair of push arms or lift arms of the earthmoving vehicle; It is rotatably connected to the tip of each of the pair of tilt mechanisms of the vehicle, and furthermore, at least one of the pair of side plates is in a state suitable for carrying out raking work using the concave curved rear surface. at least one first stop surface that comes into contact with a third stop surface disposed on at least one of the pair of push arms or lift arms when the pair of tilt mechanisms is tilted back to a required position in order to and disposed on at least one of the pair of push arms or lift arms when the pair of tilt mechanisms is tilted forward to a required position in order to make the concave curved front surface suitable for carrying out a pushing operation. A two-way blade for an earthmoving vehicle, characterized in that the blade is provided with at least one second stop surface that comes into contact with the fourth stop surface. 2. The two-way blade for an earthmoving vehicle according to claim 1, wherein cutting edges are removably attached to the front lower end of the front board and the rear lower end of the rear board, respectively. 3. The two-way blade for an earthmoving vehicle according to claim 1 or 2, wherein an upper surface plate is fixed between the upper end of the front board and the upper end of the rear board. 4. A two-way earthmoving vehicle according to any one of claims 1 to 3, wherein a bottom plate is fixed between the lower rear end of the front board and the lower front end of the rear board. blade. 5. Each of the pair of side plates protrudes upward beyond the upper end of the blade body, and the portion of each of the pair of side plates that protrudes upward beyond the upper end of the blade body corresponds to the tilt of the pair. Claim 1, wherein the mechanism is connected to the tip of each of the mechanisms, and a portion of each of the pair of side plates located below the portion is connected to the tip of each of the pair of push arms or lift arms. The two-way blade for earthmoving vehicles according to any one of Items 1 to 4. 6. The two-way earthmoving vehicle according to any one of claims 1 to 5, wherein the front board and the rear board are positioned so as to be symmetrical to each other and have substantially the same shape. Blade 7 Each of the pair of side plates has a main side plate fixed to a side end of the blade body and an auxiliary side plate fixed to the blade body at a position somewhat inside the main side plate. A two-way blade for an earthmoving vehicle according to any one of claims 1 to 6. 8. A blade body having a front board defining a concave curved front surface suitable for pushing work, etc. and a rear board defining a concave curved rear surface suitable for pulling work, raking work, etc., and a blade body fixed to both sides of the blade body. a pair of side plates, each of the pair of side plates is rotatably connected to the tip of each of the pair of push arms or lift arms of the earth-moving vehicle, and a pair of tilt mechanisms of the earth-moving vehicle. is rotatably connected to the tip of each of the pair of side plates, and furthermore, at least one of the pair of side plates is provided with a pair of side plates for making the concave curved rear surface suitable for carrying out the raking operation. When the tilt mechanism is tilted back to a desired position, at least one first stop surface comes into contact with a third stop surface provided on at least one of the pair of push arms or lift arms, and the concave curved front surface When the pair of tilt mechanisms is tilted forward to a required position in order to be in a state suitable for performing a pushing operation, a fourth stop disposed on at least one of the pair of push arms or lift arms. At least one second stop surface is provided that abuts against a surface, and a first indicator is provided on at least one of the pair of side plates or the blade body, and a first indicator piece is provided on at least one of the pair of side plates or the blade body, and a first indicator piece is provided on at least one of the pair of side plates or the blade body. A second indicator piece is provided on at least one of the lift arms or at least one of the pair of tilt mechanisms, and the first indicator piece and the second indicator piece perform a pulling operation using the concave curved rear surface. A two-way blade for an earthmoving vehicle, characterized in that when the two-way blades are positioned at a desired position by the action of the pair of tilt mechanisms, they are brought into alignment with each other in order to be in a state suitable for carrying out the work. 9. The two-way blade for an earthmoving vehicle according to claim 8, wherein at least one of the first indicator piece and the second indicator piece is attached so as to be able to freely adjust its angular position. 10 Each of the pair of side plates protrudes upward beyond the upper end of the blade body, and the portion of each of the pair of side plates that protrudes upward beyond the upper end of the blade body corresponds to the tilt of the pair. Claim 1, wherein the mechanism is connected to the tip of each of the mechanisms, and a portion of each of the pair of side plates located below the portion is connected to the tip of each of the pair of push arms or lift arms. The two-way blade for earthmoving vehicles according to item 8 or 9. 11 Each of the pair of side plates has a main side plate fixed to a side end of the blade body and an auxiliary side plate fixed to the blade body at a position somewhat inside the main side plate. A two-way blade for an earthmoving vehicle according to any one of claims 8 to 10.