JP4688536B2 - Dozer equipment - Google Patents

Description

  The present invention relates to a dozer device used for a turning work machine, for example.

Conventionally, for example, as a dozer device attached to the front part of a swivel work machine (backhoe), a back plate for arm connection is fixed to the front plate for forming a single earth discharge surface by welding, and left and right cylindrical shapes are attached to this back plate There is one in which the tip of the support arm is fixed by welding (see, for example, Patent Document 1).
JP-A-7-300875

In order to form the support arm in a cylindrical shape as in a conventional dozer device, for example, a plate material must be formed by bending a plurality of times, which takes time for manufacturing and increases costs.
In order to solve this, for example, it is conceivable to form a cylindrical support arm by firmly connecting two horizontal plates by fillet welding between two vertical plates.
However, in this case, the upper ends of the vertical plates protrude upward from the upper surface of the upper horizontal plate, and soil accumulates on the upper part of the support arm by excavation work or dozer work of the backhoe. Expected to be difficult to remove.

  The present invention has been made in view of such circumstances, and a cylindrical support arm can be easily formed by welding an L-shaped material in cross-section and an inverted L-shaped material, and the upper portion of the support arm. It is an object of the present invention to provide a dozer device that makes it easy to remove soil placed on the surface.

In order to achieve the above object, the present invention has taken the following technical means.
First, in the dozer device 2 in which a pair of left and right support arms 38R and 38L is provided with a blade 39, the support arms 38R and 38L are formed of a cross-sectional L-shaped material 42 having a vertical portion 42a and a horizontal portion 42b, and A cross-section inverted L-shaped material 43 having a horizontal portion 43b and a vertical portion 43a is welded to form a cylindrical shape having a hollow portion therein, and the horizontal portion 43b of the inverted L-shaped material 43 is L A T-shaped joint is welded to the vertical portion 42 a of the letter-shaped member 42, and the upper edge 45 of the vertical portion 42 a of the L-shaped member 42 is protruded upward from the lateral portion 43 b of the inverted L-shaped member 43. And

According to this, the support arms 38R, 38L can be formed in a cylindrical shape by welding the L-shaped material 42 and the inverted L-shaped material 43 to each other, and the support arms 38R, 38L are formed on one side. Since only the vertical portion 42a of the L-shaped member 42 protrudes upward from the horizontal portion 43b of the inverted L-shaped member 43, the soil placed on the upper side of the support arms 38R and 38L is opposite to the vertical portion 42a. Can be easily paid.
Second, the vertical widths of the vertical portions 42a and 43a of the L-shaped material 42 and the inverted L-shaped material 43 increase from the base end portions of the support arms 38R and 38L toward the distal end portion on the blade 39 side. It is characterized by being formed.

According to this, the support arms 38R and 38L that support the blade 39 can have sufficient rigidity to withstand the dozer operation.
Third, the blade 39 includes a front blade 54 provided at the tip of each support arm 38R, 38L, and a central rear blade 55 fixed to the back surface of the front blade 54 between the left and right support arms 38R, 38L. The left and right support arms 38R, 38L are provided with vertical portions 42a of the L-shaped members 42 on the inner sides in the left-right direction of the left and right support arms 38R, 38L, and on the front side of the vertical portions 42a. As the upper edge 45 of the portion 42a heads forward, a rising portion 47 is formed that rises upward, and the left and right ends of the central rear blade 55 are the vertical portions of the L-shaped members 42 of the left and right support arms 38R and 38L. The front member 42a is welded to the front side of the inverted L-shaped member 43, and the rising member 48 corresponding to the raised portion 47 of the L-shaped member 42 is welded.

  According to this, the strength of the support arms 38 </ b> R and 38 </ b> L can be improved by providing the rising portion 47 on the front side of the L-shaped material 42 and welding the rising member 48 on the front side of the inverted L-shaped material 43. Since the rising member 48 is provided only on the front side of the inverted L-shaped material 43, the soil on the support arms 38R and 38L can be wiped off from the middle portion thereof.

  According to the present invention, a cylindrical support arm can be easily formed by welding a cross-sectional L-shaped plate material and an inverted L-shaped plate material, and the support arm has an L-shaped material on one side. Since only the vertical portion protrudes upward from the lateral portion of the inverted L-shaped material, the soil placed on the upper portion of the support arm can be easily removed from the opposite side of the vertical portion.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
6 and 7, reference numeral 1 illustrates a turning work machine (backhoe) having the dozer device 2 of the present invention. This turning work machine 1 is mainly composed of a lower traveling device 3 and an upper turning body 4.
The traveling device 3 includes a pair of left and right traveling bodies 5 each having a rubber cover, and a crawler traveling apparatus is employed in which the traveling bodies 5 are driven by a traveling motor. A dozer device 2 is provided at the front portion of the traveling device 3.

The swivel body 4 has a swivel base 8 that is supported on the traveling device 3 so as to be able to turn left and right around a swivel axis in the vertical direction, and an excavation device 9 provided at a front portion of the swivel base 8. On the swivel base 8, a cabin 10 forming an operator cab is mounted.
The excavator 9 includes a swing bracket 12 supported by a pair of upper and lower support brackets 11 provided at the front portion of the swivel base 8 so as to be swingable left and right around the vertical axis, and a base side of the swing bracket 12 around the horizontal axis. A boom 13 pivotally mounted and supported so as to swing up and down, and an arm 14 pivotally mounted around the horizontal axis on the tip side of the boom 13 and supported so as to swing back and forth. The arm 14 is provided with a bucket 15 provided so as to be able to perform a squeeze / dump operation.

A rear upper surface and a right upper surface of the swivel base 8 are covered with a bonnet 22, and a driver's seat is disposed on the left side in the left-right direction on the swivel base 8, and the driver's seat is covered with a cabin 10.
On the swivel base 8, an engine, a fuel tank, a hydraulic pump, a hydraulic oil tank, a control valve, a radiator, an oil cooler, a reserve tank, a battery, and the like are arranged.
As shown in FIG. 5, the traveling device 3 includes a traveling frame 25, and the traveling frame 25 is roughly divided into a center frame 31 and side frames 32 disposed on both the left and right sides of the center frame 31. It is configured.

Support brackets 35 that support the dozer device 2 are provided at the left and right ends of the front side of the center frame 31, and a cylinder support that supports a dozer cylinder 36 that moves the dozer device 2 up and down at the left and right center portions of the front side of the center frame 31. A bracket 37 is provided.
As shown in FIGS. 1, 2, and 6, the dozer device 2 includes a pair of left and right support arms 38R and 38L, and a blade 39 supported by the support arms 38R and 38L.
The base ends of the left and right support arms 38R and 38L are pivotally supported about a horizontal axis 40 by a support bracket 35 provided on the center frame 31 so as to be swingable up and down.

The support arms 38R and 38L are formed in a cylindrical shape having a hollow portion inside by welding an L-shaped material (regular L-shaped material) 42 and an inverted L-shaped material 43. As shown in FIG. 3, the L-shaped member 42 is a metal plate bent into an L shape. An L-shaped material may be used for the L-shaped material 42.
The inverted L-shaped material 43 uses an L-shaped plate material whose cross section is the same as that of the L-shaped material 42, and is inverted in an inverted state with respect to the L-shaped material 42. It is welded to the letter material 42.

  As shown in FIGS. 2 and 3, the L-shaped member 42 includes a vertical portion 42a along the vertical direction, and a horizontal portion 42b that extends horizontally from the lower end of the vertical portion 42a and is shorter than the vertical portion 42a. Have. On the other hand, the inverted L-shaped material 43 has a horizontal portion 43b along the horizontal direction and a vertical portion 43a extending downward from the side end of the horizontal portion 43b. As shown in FIGS. 2 and 3, the length of the vertical portion 42a of the L-shaped member 42 and the length of the vertical portion 43a of the inverted L-shaped member 43 at the arbitrary positions in the longitudinal direction of the support arms 38R and 38L are the same. Similarly, the length of the horizontal portion 42b of the L-shaped material 42 and the length of the horizontal portion 43b of the inverted L-shaped material 43 are the same.

In addition, the length of the horizontal part 42b of the L-shaped material 42 can also be formed longer than the vertical part 42a. Similarly, the length of the horizontal part 43b of the inverted L-shaped material 43 is longer than the length of the vertical part 43a. Alternatively, it may be formed longer.
The horizontal portion 43b of the inverted L-shaped material 43 is fixed to the vicinity of the upper end of the vertical portion 42a of the L-shaped material 42 by T-shaped joint welding.
Accordingly, the upper edge 45 of the vertical portion 42a of the L-shaped member 42 protrudes upward from the lateral portion 43b of the inverted L-shaped member 43, and the upper portions of the support arms 38R and 38L are only on one side of the left and right sides. The upper edge 45 of the vertical portion 42a of the L-shaped material 42 is projected. As a result, even when soil is placed on the upper surfaces of the support arms 38R and 38L by dozer work or backhoe excavation work, the soil can be easily wiped off to the side opposite to the vertical portion 42a.

The horizontal portion 42b of the L-shaped member 42 is fixed to the vertical portion 43a of the inverted L-shaped member 43 protruding downward by T-shaped joint welding. Therefore, the lower edge 46 of the vertical portion 43 a of the inverted L-shaped material 43 protrudes below the lateral portion 42 b of the L-shaped material 42.
By welding the L-shaped material 42 and the inverted L-shaped material 43 in this way, the vertical portions 43a of the L-shaped material 42 and the inverted L-shaped material 43 are formed on the left and right side walls of the cylindrical support arms 38R and 38L. Thus, the lateral portion 43b of the inverted L-shaped member 43 serves as the upper wall portion of the support arms 38R and 38L, and the lateral portion 42b of the L-shaped member 42 serves as the lower wall portion.

As described above, since the L-shaped member 42 and the inverted L-shaped member 43 are connected by T-shaped welding, the cylindrical support arms 38R and 38L can be easily integrated by fillet welding. Can be formed.
The vertical width of the vertical portion 42a of the L-shaped member 42 and the vertical portion 43a of the inverted L-shaped member 43 are gradually increased from the base end portions of the support arms 38R and 38L toward the distal end portion on the blade 39 side. Is formed. As a result, the support arms 38R and 38L have improved rigidity and can secure sufficient strength to withstand the dozer work by the blade 39.

The upper surface of the horizontal portion 43b of the inverted L-shaped material 43 is a straight line inclined at a predetermined angle with respect to the center line X of the support arms 38R and 38L shown in FIG. The upper edge 45 of the vertical portion 42a of L-shaped member 42 is formed to approximately the same angle with an inclined straight line shape and inclination of the lateral portions 43b, are substantially parallel to the upper surface of the front Kiyoko portion 43b .
As shown in FIGS. 2 and 6, the L-shaped member 42 is located on the inner side in the left-right direction of the support arms 38R, 38L arranged on the left and right. Therefore, the vertical portion 42a of each L-shaped member 42 is also provided inside the left and right support arms 38R and 38L, and serves as the inner wall in the left and right direction of each support arm 38R and 38L.

As shown in FIG. 1, on the front side of the vertical portion 42a, there is an upright portion 47 that gradually rises upward in front of the support arms 38R and 38L, that is, from the base end side toward the tip end side. And is integrally formed. The upper edge 47a of the upright portion 47 is formed in a linear shape that is largely inclined with respect to the center line X than the upper edge 45 of the linear vertical portion 42a described above.
On the other hand, on the front side of the inverted L-shaped member 43, a rising member 48 corresponding to the rising portion 47 of the L-shaped member 42 is provided. The rising member 48 is formed by forming a plate member separate from the inverted L-shaped member 43 into a triangular shape having the same size as the raised portion 47, and upward on the front side of the lateral portion 43 b of the inverted L-shaped member 43. It is fixed by welding so that it protrudes.

As shown in FIGS. 2 and 6, the rising member 48 is provided substantially in parallel with the rising portion 47 of the L-shaped member 42 along the longitudinal direction of the support arms 38R and 38L. However, it is flush with the outer surface in the left-right direction of the vertical portion 43 a of the inverted L-shaped material 43.
The blade 39 is formed by integrating a front blade and a rear blade disposed on the front and rear sides by welding or the like. That is, the blade 39 includes a front blade 54 fixed to the front ends of a pair of left and right support arms 38R and 38L, a central rear blade 55 fixed to a back surface 59 of the front blade 54 between the left and right support arms 38R and 38L, A side rear blade 56 is secured to the back surface 59 of the front blade 54 between the support arms 38R, 38L and the respective ends of the front blade 54.

As shown in FIGS. 1, 2, and 4, the front blade 54 is formed in a plate shape using an iron plate or a steel plate, and side plates 57 are provided at both left and right ends thereof. The front blade 54 is formed in a slightly curved shape so that it gradually moves backward as it goes from its lower end to the upper and lower substantially central part, and gradually moves forward as it goes from its upper and lower central part to the upper part. The upper end is bent backward.
The front ends of the support arms 38R and 38L are welded to the back surface of the front blade 54. The upright portions 47 and the upright members 48 of the support arms 38R and 38L are welded to the upper side of the upper and lower central portions of the front blade 54. A strip-shaped plate material is welded to the lower end portion of the front blade 54 over substantially the entire width in the left-right direction, and this plate material portion serves as a claw portion 39 a of the blade 39.

The central rear blade 55 forms a box-shaped portion 58 in the left and right central portion of the blade 39 together with the left and right support arms 38R and 38L and the front blade 54. The central rear blade 55 is located at a substantially central portion in the left-right direction of the front blade 54, and is formed in a U-shape in cross-sectional view with an opening on the front side and the left and right sides made of an iron plate or a steel plate.
More specifically, the central rear blade 55 has an upper wall 60 whose upper front end (front opening side) is welded to the upper portion of the rear surface 59 of the front blade 54, and a lower front end that is positioned below the rear surface 59 of the front blade 54. It is configured by connecting the welded lower wall 61 with a back wall 62 on the rear side. The upper wall 60, the lower wall 61, and the back wall 62 are integrally formed.

The left and right ends of the central rear blade 55, that is, the left and right ends of the upper and lower walls 60 and 61 and the back wall 62 are front sides of the vertical portion 42a of the L-shaped member 42 provided inside the left and right support arms 38R and 38L. The left and right central portions of the blade 39 are box-shaped and the box-shaped portion 58 is formed.
The left and right end portions of the upper wall 60 of the central rear blade 55 are welded so as to overlap the upright portion 47 of the vertical portion 42 a of the L-shaped member 42. As shown in FIGS. 1 and 4, the upper wall 60 is welded to the vertical portion 42 a of the L-shaped member 42 so as to be inclined at substantially the same angle as the inclination angle of the upright portion 47.

As described above, by forming the raised portion 47 in the vertical portion 42a of the L-shaped member 42 provided on the left and right inner sides of the support arms 38R and 38L, it is sufficient for welding the left and right end portions of the central rear blade 55. A long welding length can be secured at the front portions of the support arms 38R and 38L.
Further, the strength of the front portion of the support arms 38R, 38L is improved by providing the rising portion 47 and the rising member 48 on the front side of the support arms 38R, 38L, and the front blade is provided on the front side of the support arms 38R, 38L. 54 and the central rear blade 55 can be welded to ensure sufficient strength, and the soil or the like that has entered between the upright portion 47 and the upright member 48 can be wiped back, so that the support arms 38R, 38L Sufficient soil removal at the top can be secured.

A cylinder support bracket 63 that supports the tip of the dozer cylinder 36 is provided on the back surface of the central rear blade 55, that is, the back wall 62, and the tip of the dozer cylinder 36 pivots around the horizontal axis. It is supported.
As shown in FIG. 4, the side rear blade 56 forms a box-shaped portion 64 on the left and right sides of the blade 39 together with the left and right support arms 38 </ b> R and 38 </ b> L and the front blade 54. The side rear blades 56 are located on both sides in the left-right direction of the front blade 54, and are formed in a U-shaped cross-sectional view that is opened on the front side and the left and right sides with an iron plate or a steel plate. The front-rear width of the side rear blade 56 is set smaller than the front-rear width of the center rear blade 55.

The side rear blade 56 has an upper wall 65 whose upper front end (front opening side) is welded to the vertical center of the back surface 59 of the front blade 54, and a lower front end at the lower portion of the back surface 59 of the front blade 54. The welded lower wall 66 is connected to the rear side by a back wall 67, and the upper wall 65, the lower wall 66, and the back wall 67 are integrally formed.
The front and rear widths of the upper wall 65 and the lower wall 66 of the side rear blade 56 are smaller than the upper wall 60 and the lower wall 61 of the central rear blade 55, and the back wall 67 of the side rear blade 56 is the back of the central rear blade 55. It is located in front of the wall 62.

The left and right edges of the side rear blade 56, that is, the left and right edges of the upper and lower walls 65, 66 and the back wall 67 are the vertical portions 43 a of the inverted L-shaped member 43 provided outside the left and right support arms 38 R, 38 L and The side plate 57 is welded by welding or the like, whereby the left and right sides of the blade 39 are box-shaped and the box-shaped portion 64 is formed.
Therefore, as shown in FIG. 6, the back surface (back wall 62) side of the central rear blade 55 protrudes to the base end side of the support arms 38 </ b> R and 38 </ b> L from the back surface (back wall 67) side of the side rear blade 56. The welded portion 70 of the back wall 62 of the central rear blade 55 with respect to the left and right support arms 38R, 38L is more supported than the welded portion 71 of the back wall 67 of the side rear blade 56 with respect to the left and right support arms 38R, 38L. It is located on the base end side of 38L.

A reinforcing member 73 formed of an iron plate, a steel plate, or the like is welded between the side rear blade 56 and the left and right support blades 39, that is, on the rear portion of the side rear blade 56.
The dozer apparatus 2 configured as described above can perform a predetermined dozer operation by vertically swinging the support arms 38R and 38L around the horizontal axis 40 by expansion and contraction of the dozer cylinder 36.
In the above embodiment, the support arms 38R and 38L are formed by integrally forming the raised portion 47 on the front side of the L-shaped member 42 and welding a separate rising member 48 on the front side of the inverted L-shaped member 43. Although illustrated, the same plate material as the rising member 48 is welded to the front side of the L-shaped member 42 using a plate member having the same shape as the inverted L-shaped member 43 without providing the rising portion 47 on the L-shaped member 42. Thus, the support arms 38R and 38L may be formed.

  According to this, since the same board | plate material can be shared by the L-shaped material 42 and the inverted L-shaped material 43, the manufacturing cost of the support arms 38R and 38L can be reduced.

It is a side view of the traveling apparatus provided with the dozer device of an embodiment of the invention. It is a top view of a dozer device. It is an AA arrow line sectional view of FIG. It is a side view of the front part of a dozer device. It is a front view of a strike frame. It is a top view of the turning work machine provided with the dozer device. It is a side view of the turning work machine provided with the dozer device.

Explanation of symbols

2 Dozer device 38L Support arm 38R Support arm 39 Blade 42 L-shaped material 43 Inverted L-shaped material 45 Upper edge 47 Upright portion 48 Upright member 54 Front blade 55 Central rear blade 56 Side rear blade

Claims (2)

In a dozer device (2) in which a pair of left and right support arms (38R, 38L) is provided with a blade (39),
The support arm (38R, 38L) is provided with a cross-sectional L-shaped material (42) having a vertical portion (42a) and a horizontal portion (42b), and a horizontal portion (43b) and a vertical portion (43a). The cross-section inverted L-shaped material (43) is welded and formed into a cylindrical shape having a hollow portion inside,
The horizontal portion (43b) of the inverted L-shaped material (43) is T-jointed to the vertical portion (42a) of the L-shaped material (42), and the vertical portion (42a) of the L-shaped material (42). ) Projecting upward from the lateral portion (43b) of the inverted L-shaped material (43) ,
The vertical portions (42a, 43a) of the L-shaped material (42) and the inverted L-shaped material (43) are moved from the base end portion of the support arm (38R, 38L) toward the blade (39) side distal end portion. It is formed so that the vertical width becomes large,
On the front side of the vertical portion (42a) of each L-shaped member (42) of the left and right support arms (38R, 38L), the upper edge (45) of the vertical portion (42a) stands upward as it goes forward. The dozer apparatus characterized by integrally forming the upper part (47) . The blade (39) includes a front blade (54) provided at the tip of the left and right support arms (38R, 38L) and a back surface of the front blade (54) and the left and right support arms between the left and right support arms (38R, 38L). The central rear blade (55) fixed to (38R, 38L) and the back surface (59) of the front blade (54) between the left and right support arms (38R, 38L) and the respective ends of the front blade (54). ) And left and right side rear blades (56) fixed to the left and right support arms (38R, 38L),
The left and right support arms (38R, 38L) are provided with the vertical portion (42a) and the upright portion (47) of each L-shaped member (42) inside the left and right support arms (38R, 38L) in the left-right direction, Weld with the left and right ends of the center rear blade (55),
The rising member (48) corresponding to the rising portion (47) of the L-shaped material (42) is flush with the outer surface in the left-right direction on the front side of the vertical portion (43a) of the inverted L-shaped material (43). The dozer device according to claim 1, wherein the dozer device is welded .

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