JP2005002672A - Blade for bulldozer - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a blade for a bulldozer, which can further save the weight thereof. <P>SOLUTION: The blade for the bulldozer has a front-side base plate (11) and wing plates (12) which are fixed to right and left edges of the base plate and inclined toward front right and left edges, respectively. The base plate (11) has notches (11a) formed at right and left edges thereof corresponding to locations that are each behind the wing plate (12). In this manner unnecessary portions at the right and left edges of the the base plate are cut away, and therefore the entire weight of the base plate can be sufficiently reduced. Further the front-side base plate (11) has vertically divided wear plates (31, 32) fixed to a front surface thereof. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a bulldozer blade.
[0002]
[Prior art]
The bulldozer for earthing is provided with a blade for earthing rock in the front part of a vehicle body having a crawler type traveling device so as to be able to swing up and down, and traveling while carrying earth and sand or rocks with this blade, or carrying it, or It is used for operations such as leveling by pushing the earth while operating the blade up and down. The structure of this blade is described in Patent Document 1, for example, and FIGS. 5 and 6 are a side view and a plan view of the conventional blade described in Document 1, respectively. 5 and 6, the blade is a front plate (corresponding to a base plate of the present invention) 51 extending to the left and right ends of the blade, and the front and left ends of the front plate 51 toward the front left and right ends, respectively. Inclined and fixed wing plates 52 and 52, a plurality of U-shaped reinforcing plates 55 fixed to the rear surface portion of the front plate 51 along the left and right direction, the left and right wing plates 52 and 52, and the front plate 51 And a plate material 54 fixed to the upper and lower sides and the side surface of a substantially triangular column-shaped space 53 formed between the two. A rear plate 56 is fixed between the upper and lower reinforcing plates 55, and a plate member 54 is fixed to the side surface portion of the reinforcing plate 55.
[0003]
Further, although not described in Patent Document 1, for example, as shown in FIG. 7, a plurality of pieces of wear for replacement at the time of wear are provided on the front plate 51 of the blade and the front surfaces of the left and right wing plates 52, 52. Plates 61, 62, 63, and 64 are fixed to each other. That is, a wear plate 61 is provided at a substantially central portion of the front plate 51, wear plates 62 and 62 are provided at the left and right portions, wear plates 63 and 63 are provided at the left and right wing plates 52 and 52, and the front plate 51 and the wing are provided. Wear plates 64 and 64 are fixed along crossing portions where the plates 52 and 52 cross each other.
[0004]
[Patent Document 1]
Japanese Utility Model Publication No. 7-24432 (page 1-2, Fig. 1-2)
[0005]
[Problems to be solved by the invention]
By the way, in the bulldozer, a heavy blade is provided in front of the vehicle body. Therefore, when the vehicle body moves up and down during leveling work or the like, the blade moves along with it, and the movement from the inertia due to the weight of the blade occurs, so that the vehicle body itself is easily moved up and down by the movement. As described above, when the vehicle body moves up and down due to the response, it is very difficult to perform a vertical movement operation for maintaining the blade position at substantially the same height with respect to the ground. In addition, since the weight of the blade is large, it is difficult to improve the followability of the vertical movement of the blade. From the above, in order to suppress the vibration of the vehicle body caused by the vertical movement of the blade during leveling work and to improve the blade operability, the weight reduction of the blade has hitherto been a major issue.
[0006]
However, in the conventional blade shown in FIGS. 5 and 6, since the left and right end portions of the front plate 51 are extended to the rear of the left and right wing plates 52, 52, the weight ratio of the front plate 51 Becomes larger and the weight increases as a whole. In view of this, the right and left extending portions of the front plate 51 may be reduced in weight by forming holes of a predetermined size, but sufficient effects are not obtained.
Further, as shown in FIG. 7, a plurality of thick wear plates 61 to 64 are fixed to the front surface of the front plate 51 and the left and right wing plates 52, 52 in order to improve durability against wear and exchangeability. Therefore, the weight of the blade must be increased.
[0007]
As described above, the weight reduction of the blade is not yet sufficient, and it is required to achieve further weight reduction.
[0008]
An object of the present invention is to provide a bulldozer blade that can be further reduced in weight in order to achieve the above-described problems.
[0009]
[Means, actions and effects for solving the problems]
In order to achieve the above object, the first invention is a bulldozer blade in which a wing plate is fixed to a left and right end portion of a base plate on a front surface so as to incline toward the front of the left and right ends. It is set as the structure which formed the notch part in the site | part located back.
[0010]
According to the first aspect of the present invention, the base plate can be sufficiently reduced in weight by notching unnecessary portions at the left and right end portions and removing them reliably. For this reason, since the blade can be further reduced in weight, the responsiveness of the vertical movement of the blade can be improved, and the operability of the blade can be improved.
[0011]
According to a second aspect of the present invention, in a bulldozer blade in which a wear plate is fixed to the surface of a front base plate, the wear plate is divided into upper and lower parts.
[0012]
According to the second invention, the lower wear plate usually wears more than the upper part due to a large frictional force caused by earth and sand during excavation, so that only the lower wear plate is thickened, and the lower wear plate is By reducing the plate thickness, the weight of the blade can be further reduced. Further, when the lower wear plate is worn, it is only necessary to replace the lower wear plate, so that the replacement work becomes very easy and the maintenance cost of the blade can be reduced.
[0013]
According to a third aspect of the present invention, in the bulldozer blade of the first aspect, the wear plate is vertically divided and fixed to the surface of the base plate.
[0014]
According to the third aspect of the invention, in addition to reducing the weight of the base plate, the weight of the wear plate can be reduced at the same time, so that the blade can be sufficiently reduced in weight.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below in detail with reference to the drawings.
[0016]
1 is a top view of a blade according to the present invention, FIG. 2 is a rear view thereof, and FIG. 3 is a left side view of FIG. 1 to 3, the blade 1 is extended from the center of the front surface to the left and right wings and is curved forwardly in a concave shape, and the left and right ends of the base plate 11 are inclined toward the front of the left and right ends. And a wing plate 12 that is concavely curved forward. Notch portions 11a and 11a are formed in unnecessary portions (in the present example, approximately the center portion in the vertical direction) at the left and right end portions of the base plate 11 located behind the wing plate 12. Further, reinforcing members 13, 14, 15 having a substantially U-shaped cross section are fixed to the rear surface of the base plate 11 with the openings being in contact with the base plate 11, and the base plate avoiding the notches 11 a, 11 a. 11, the reinforcing members 13 and 15 are provided up to the left and right ends, and the reinforcing member 14 is provided between the notches 11a and 11a.
[0017]
An outer cover is provided between the upper end of the base plate 11 and the upper reinforcing member 13, between the reinforcing members 13 and 14, between the reinforcing members 14 and 15, and between the reinforcing member 15 and the lower end of the base plate 11. 16a, 16b, 16c, 16d are fixed. In addition, brackets 17 and 17 for attaching a hydraulic cylinder 25 for tilting the blade 1 are fixed to the left and right end portions of the rear surface portion of the reinforcing member 13, and not shown in the left and right end portions of the rear surface portion of the reinforcing member 15. Brackets 18 and 18 are attached to the left and right support frames (not shown) for connecting the vehicle body and the blade 1 so as to be swingable. A bracket 19 for attaching an arm (not shown) that is connected between the support frame and the blade 1 and holds the posture of the blade 1 is fixed to the central portion of the rear surface portion of the reinforcing member 15 in the left-right direction. The left and right reinforcing members 13 and 15 have a minimum length L1 between the left and right brackets 17 and 17 and between the left and right brackets 18 and 18, respectively. It is formed to be smaller than the outer width dimension L2 by a predetermined length.
[0018]
In addition, the brackets 17 and 17 and the brackets 18 and 18 are made of a casting, and the weight is reduced while maintaining the strength.
[0019]
Further, reinforcing members 21 are fixed to a plurality of upper and lower portions between the wing plates 12 and 12 and the vertically extending portions of the base plate 11 excluding the notches 11a and 11a at the rear of the wing plates 12 and 12. ing. And the covers 22 and 22 which cover the upper surface and side surface of the rear space of the wing plates 12 and 12 provided with the plurality of reinforcing members 21 are fixed. The side surfaces of the covers 22, 22 are inclined from the front to the rear inner side so as to connect the outer ends of the wing plates 12 in the left-right direction and the front ends of the outer ends of the reinforcing members 13, 15. Inclined portions 22a and 22a are formed. The angles of the inclined portions 22a, 22a are set to values that minimize the planar view area, that is, the weight of the plurality of reinforcing members 21 as much as possible. A plurality of reinforcing materials 23 and 23 are fixed to the outer surface of the corner portion formed by the side surface portion along the left and right outer ends of the reinforcing materials 13 and 15 and the inclined portions 22a and 22a.
[0020]
Blade members 3, 4, and 4 are fixed to lower ends of the base plate 11 and the left and right wing plates 12, 12, respectively.
[0021]
FIG. 4 is a front view of the blade. As shown in FIG. 4, an upper wear plate 31 is fixed to the upper front part of the base plate 11, a lower wear plate 32 is fixed to the lower part, and an upper wear plate 33 is attached to the upper front parts of the left and right wing plates 12, 12. A lower wear plate 34 is fixed to the lower part. The lower wear plates 32 and 34 are thicker than the upper wear plates 31 and 33, and have high wear resistance. In addition, thick wear plates 35 and 35 are fixed to corners formed by the base plate 11 and the left and right wing plates 12 and 12.
[0022]
With the above configuration, the following effects can be obtained.
Notch portions 11 a and 11 a are formed in unnecessary portions of the left and right end portions of the base plate 11, leaving the portions of the base plate 11 to which the left and right ends of the reinforcing members 13 and 15 to which the brackets 17 and 18 are fixed are fixed. For this reason, since the weight of the base plate 11 can be reduced to the minimum necessary, the overall weight of the blade 1 can be further reduced. This makes it difficult for the bulldozer to swing in the front-rear direction and improves the responsiveness of the vertical movement of the blade, thereby improving the operability of the blade 1.
[0023]
In addition, the wear plate is divided into a fast wear lower portion and a slow wear upper portion, and the upper wear plates 31, 33 are made thinner than the lower wear plates 32, 34, so that the overall weight of the blade 1 is achieved. Can be made lighter. As a result, the blade 1 can be easily operated in the same manner as described above, and the responsiveness of the vertical movement of the blade can be improved. Furthermore, since only the lower wear plates 32, 34 having a large amount of wear can be exchanged, the exchange work is very easy and the maintenance cost of the blade 1 can be reduced.
[0024]
Furthermore, the length of the left and right extending portions of the base plate 11 and the reinforcing members 13 and 15 located behind the left and right wing plates 12 and 12 is set to the minimum necessary length, and the left and right sides of the base plate 11 and the reinforcing members 13 and 15 are provided. Provided behind the wing plates 12, 12 by increasing the inclination angle of the side inclined portions 22 a, 22 a of the covers 22, 22 connecting the front part of the end part and the left and right outer ends of the left and right wing plates 12, 12. The weight of the reinforcing material 21 is suppressed to be small. Thereby, the weight of the blade can be further reduced.
[Brief description of the drawings]
FIG. 1 is a top view of a blade according to the present invention.
FIG. 2 is a rear view of the same.
FIG. 3 is a left side view of FIG. 2;
4 is a front view of the blade of FIG. 1. FIG.
FIG. 5 is a side view of a conventional blade.
FIG. 6 is a plan view of a conventional blade.
FIG. 7 is a front view of a conventional blade.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Blade, 3, 4 ... Blade member, 11 ... Base plate, 11a ... Notch part, 12 ... Wing plate, 13, 14, 15 ... Reinforcement material, 16a, 16b, 16c, 16d ... Outer cover, 17 ... Bracket, DESCRIPTION OF SYMBOLS 18 ... Bracket, 19 ... Bracket, 21 ... Reinforcing material, 22 ... Cover, 22a ... Inclined part, 23 ... Reinforcing material, 31 ... Upper wear plate, 32 ... Lower wear plate, 33 ... Upper wear plate, 34 ... Lower wear plate 35 ... Wear plate, 51 ... Front plate (base plate), 52 ... Wing plate, 54 ... Plate material, 55 ... Reinforcement plate, 56 ... Rear plate, 61, 62, 63, 64 ... Wear plate.

Claims (3)

In a bulldozer blade in which a wing plate (12) is fixedly attached to the left and right ends of the front base plate (11) by inclining toward the front of the left and right ends,
A bulldozer blade characterized in that a notch (11a) is formed in a portion located at the rear of the wing plate (12) at the left and right ends of the base plate (11). In the bulldozer blade with the wear plate secured to the surface of the front base plate (11),
A bulldozer blade characterized in that the wear plates (31, 32) are divided vertically. The bulldozer blade according to claim 1,
A bulldozer blade characterized in that a wear plate (31, 32) is vertically divided and fixed to the surface of a base plate (11).

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