JP7152374B2 - bracket - Google Patents

Description

The present invention relates to a bracket for fixing a structure to a base.

Since the engine, which is the power source of the working machine, is provided with an oil pan at the bottom, it cannot be placed directly on the base. Therefore, Patent Literature 1 discloses a structure in which the engine is fixed to a base via brackets attached to the sides of the engine.

The bracket described in Patent Document 1 includes a vertical plate formed with bolt holes for fixing the bracket to the engine, a horizontal plate formed with bolt holes for fixing the bracket to an anti-vibration mount, and a vertical plate. It is composed of a pair of reinforcing plates provided on the left and right.

JP 2015-17458 A

Here, in Patent Document 1, the vertical plate and the pair of reinforcing plates are formed by bending a flat plate. Therefore, since both the left and right ends of the vertical plate are curved, there is a problem that the plane portion for forming the bolt holes becomes small. On the other hand, when trying to ensure the size of the flat portion, there is a problem that the bracket becomes large.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a bracket for fixing a structure to a base that can be mounted even in a narrow space.

To achieve the above object, the present invention provides a bracket for fixing a structure to a base, wherein a first wall and a second wall are bent into an L-shape, and bolts for fixing the bracket to the base. A first angle formed in the first wall and a third wall and a fourth wall bent into an L-shape through which bolts for fixing the bracket to the structure are inserted. a second angle formed in the third wall, the first angle and the second angle having end surfaces of the third wall and the fourth wall extending from the inner surface of the first wall; and the other end surface of the third wall linearly abuts the inner surface of the second wall, and the second wall and the fourth wall are combined to face each other with a predetermined gap. It is characterized by

ADVANTAGE OF THE INVENTION According to this invention, the bracket which fixes a structure with respect to a base WHEREIN: The structure which can be attached also to a narrow part can be implement|achieved. Problems, configurations, and effects other than those described above will be clarified by the following description of the embodiments.

1 is a side view of a hydraulic excavator that is a representative example of a working machine according to this embodiment; FIG. 1 is a schematic diagram of an engine and an aftertreatment device; FIG. It is an exploded perspective view of the bracket, (A) showing the front side and (B) showing the rear side. It is an assembly perspective view of a bracket, Comprising: (A) shows the front side, (B) shows the back side. FIG. 4 is a perspective view of the bracket attached to the engine; FIG. 4 is a plan view of the bracket attached to the engine; It is a front view of the state where the bracket was attached to the engine.

An embodiment of a working machine according to the present invention will be described with reference to the drawings. FIG. 1 is a side view of a hydraulic excavator 1, which is a representative example of a working machine according to this embodiment. A specific example of the working machine is not limited to the hydraulic excavator 1, and may be a dump truck, a motor grader, a wheel loader, or the like.

As shown in FIG. 1 , the hydraulic excavator 1 mainly includes a lower running body 2 and an upper revolving body 3 supported by the lower running body 2 so as to be able to turn. The undercarriage 2 has a pair of left and right crawler belts 8 . The pair of left and right crawler belts 8 are rotated independently by being driven by a traveling motor (not shown). As a result, the hydraulic excavator 1 can move forward, backward, and turn. However, the undercarriage 2 may be of a wheeled type instead of the crawler belt 8 .

The upper revolving body 3 is supported by the lower traveling body 2 so as to be revolvable by a revolving motor (not shown). The upper revolving body 3 includes a revolving frame 5 as a base, a front work machine 4 attached to the front center of the revolving frame 5 so as to be rotatable in the vertical direction, a counterweight 6 arranged behind the revolving frame 5, It mainly includes a cab 7 arranged on the front left side of the revolving frame 5 and an engine building 9 .

The front work machine 4 includes a boom 4a supported by the upper revolving body 3 so as to be raised, an arm 4b swingably supported at the tip of the boom 4a, and a bucket swingably supported at the tip of the arm 4b. 4c, and hydraulic cylinders 4d-4f that drive boom 4a, arm 4b, and bucket 4c. The counterweight 6 is for balancing the weight with the front work machine 4, and is a heavy article having an arc shape.

The cab 7 has an internal space where an operator who operates the hydraulic excavator 1 rides. In the interior space of the cab 7, operation devices (steering, pedals, levers, switches, etc.) that receive operator's operations to instruct the operation of the hydraulic excavator 1 are arranged. That is, the hydraulic excavator 1 is operated by an operator riding in the cab 7 operating the operating device.

The engine building 9 is supported by the revolving frame 5 between the counterweight 6 and the cab 7 . The engine building 9 has an internal space that accommodates the engine 10 and an aftertreatment device 20 (see FIG. 2). FIG. 2 is a schematic diagram of the engine 10 and the aftertreatment device 20. As shown in FIG.

The engine 10 generates driving force for operating the hydraulic excavator 1 . More specifically, the engine 10 rotates a hydraulic pump (not shown) that supplies hydraulic fluid to hydraulic actuators. The travel motor, swing motor, and hydraulic cylinders 4d to 4f are operated by supplying hydraulic oil from the hydraulic pump.

The engine 10 mainly includes a cylinder block 11 , a flywheel housing 12 adjacent to the cylinder block 11 in the left-right direction (horizontal direction), and an exhaust pipe 13 for discharging exhaust gas from the cylinder block 11 . Since the specific configuration of the engine 10 is well known, detailed description thereof will be omitted.

A side surface (first side surface) 11a of the cylinder block 11 and a side surface (second side surface) 12a of the flywheel housing 12 are horizontally adjacent to each other. A side surface 12a of the flywheel housing 12 is recessed from a side surface 11a of the cylinder block 11, as shown in FIG. That is, a step is formed between the side surface 11 a of the cylinder block 11 and the side surface 12 a of the flywheel housing 12 .

The aftertreatment device 20 is arranged adjacent to the engine 10 in the left-right direction. More specifically, the aftertreatment device 20 is arranged adjacent to the flywheel housing 12 of the engine 10 . The post-treatment device 20 includes, for example, a first post-treatment device 21 for removing particulate matter in the exhaust gas discharged from the engine 10 through the exhaust pipe 13, and a urea catalyst for the exhaust gas discharged from the first post-treatment device 21. and a second aftertreatment device 22 for additionally reducing NOx (nitrogen compounds).

An engine (object) 10 is fixed to a base 9 a of an engine building 9 via brackets 30 and 40 . More specifically, the bracket 30 is fixed to the side surface 11a of the cylinder block 11 and the base 9a via anti-vibration rubber. Also, the bracket 40 is fixed to the side surface 12a of the flywheel housing 12 and the base 9a via anti-vibration rubber. Brackets 30 and 40 are also attached to the opposite side surface of engine 10 .

Here, the side surface 11a of the cylinder block 11 has a relatively large space for mounting the bracket 30 thereon. On the other hand, the side surface 12a of the flywheel housing 12 has a narrow width in the left-right direction and is close to the post-processing device 20, so there is little space for mounting the bracket 40 thereon. Therefore, in this embodiment, the bracket 40 attached to the side surface 12a of the flywheel housing 12 has the structure shown in FIGS.

FIG. 3 is an exploded perspective view of the bracket 40, where (A) shows the front side and (B) shows the rear side. FIG. 4 is an assembled perspective view of the bracket 40, where (A) shows the front side and (B) shows the rear side. The bracket 40 is configured by combining a first angle 41 and a second angle 42 .

The first angle 41 is an L-shaped member having a first wall 43 and a second wall 44 that intersect each other. The second angle 42 is an L-shaped member having a third wall 45 and a fourth wall 46 that intersect each other. Typically, the first wall 43 and the second wall 44 are orthogonal and the third wall 45 and the fourth wall 46 are orthogonal.

The first wall 43 and the second wall 44 are formed by bending a flat plate. That is, the connecting portion of the first wall 43 and the second wall 44 is curved. Similarly, the third wall 45 and the fourth wall 46 are formed by bending a flat plate. That is, the connecting portion between the third wall 45 and the fourth wall 46 is curved. Hereinafter, a surface connecting to the inner side of the curve is referred to as an "inner surface," a surface connecting to the outer side of the curve is referred to as an "outer surface," and a surface intersecting the inner and outer surfaces is referred to as an "end surface."

The first wall 43 has an inner surface 43a, an outer surface 43b, a front end surface 43c, a rear end surface 43d, and a left end surface 43e. The second wall 44 has an inner surface 44a continuous with the inner surface 43a, an outer surface 44b continuous with the outer surface 43b, a front end surface 44c continuous with the front end surface 43c, a rear end surface 44d continuous with the rear end surface 43d, and an upper end surface 44e. have

The third wall 45 has an inner surface 45a, an outer surface 45b, an upper end surface 45c, a lower end surface 45d, and a right end surface 45e. The fourth wall 46 has an inner surface 46a continuous with the inner surface 45a, an outer surface 46b continuous with the outer surface 45b, an upper end surface 46c continuous with the upper end surface 45c, a lower end surface 46d continuous with the lower end surface 45d, and a front end surface 46e. have

A first bolt hole 47 is formed in the first wall 43 . The first bolt hole 47 penetrates the first wall 43 in the thickness direction. Also, the first bolt hole 47 is formed substantially in the center of the first wall 43 . A bolt for fixing the bracket 40 to the base 9 a is inserted through the first bolt hole 47 .

A front end face 44c of the second wall 44 is inclined in a direction of approaching the rear end face 44d as the distance from the first wall 43 increases. In other words, the width of the second wall 44 in the front-rear direction (that is, the distance between the front end surface 44c and the rear end surface 44d) becomes shorter as the distance from the first wall 43 increases. In other words, the width of the second wall 44 in the front-rear direction increases as it approaches the first wall 43 .

The third wall 45 is formed with a plurality of second bolt holes 48a, 48b, 48c, 48d, and 48e (hereinafter collectively referred to as "second bolt holes 48"). The second bolt hole 48 penetrates the third wall 45 in the thickness direction. A bolt for fixing the bracket 40 to the engine 10 (more specifically, the side surface 12 a of the flywheel housing 12 ) is inserted through the second bolt hole 48 .

The second bolt holes 48a, 48b, 48c are arranged along _an imaginary line L1 extending in the vertical direction. The _second bolt holes 48d, 48e, 48f are arranged along an imaginary line L2 extending in the vertical direction. The virtual lines L ₁ and L ₂ extend parallel to each other at positions spaced apart in the left-right direction. In other words, the imaginary line L1 is _a line connecting the centers of the second bolt holes 48a, 48b, 48c. A virtual line L2 is a line connecting the centers of the _second bolt holes 48d, 48e, and 48f.

The number of second bolt holes 48 formed in the third wall 45 is not limited to the above example. At least _one second bolt hole 48 should be formed on the imaginary line L1. Also, at least one _second bolt hole 48 may be formed on the imaginary line L2. That is, it is sufficient that the third wall 45 is formed with the second bolt holes 48 at two locations spaced apart in the left-right direction.

A front end face 46e of the fourth wall 46 is inclined in a direction of approaching the third wall 45 with increasing distance from the lower end face 46d. In other words, the width of the fourth wall 46 in the front-rear direction (that is, the distance between the front end surface 46e and the inner surface 45a of the third wall 45) becomes shorter with increasing distance from the lower end surface 46d. Furthermore, in other words, the width of the fourth wall 46 in the front-rear direction increases as it approaches the lower end surface 46d.

In the bracket 40, the lower end surfaces 45d and 46d of the third wall 45 and the fourth wall 46 contact the inner surface 43a of the first wall 43, and the right end surface 45e of the third wall 45 contacts the inner surface 44a of the second wall 44. , the second wall 44 and the fourth wall 46 are formed by combining the first angle 41 and the second angle 42 so that the second wall 44 and the fourth wall 46 face each other with a predetermined interval in the left-right direction. The horizontal direction is an example of the facing direction.

Also, the first angle 41 and the second angle 42 are joined by welding the contact portions. Therefore, the first angle 41 and the second angle 42 are combined with their contact surfaces shifted to form a step for fillet welding at the contact portion.

More specifically, as shown in FIG. 4A, the lower end surface 46d of the fourth wall 46 contacts the inner surface 43a of the first wall 43 at a position shifted to the right from the left end of the inner surface 43a. . That is, the left end of the inner surface 43a of the first wall 43 is exposed. As a result, a step is formed between the first wall 43 and the fourth wall 46 by the inner surface 43 a of the first wall 43 and the outer surface 46 b of the fourth wall 46 .

Further, as shown in FIG. 4A, a portion of the right end face 45e of the third wall 45 is located behind the rear end of the second wall 44. As shown in FIG. That is, the rear end of the right end surface 45e of the third wall 45 is exposed. As a result, a step is formed between the second wall 44 and the third wall 45 by the rear end surface 44 d of the second wall 44 and the right end surface 45 e of the third wall 45 .

Furthermore, as shown in FIG. 4B, a portion of the lower end surface 45d of the third wall 45 is located behind the rear end of the first wall 43. As shown in FIG. That is, the rear end of the lower end surface 45d of the third wall 45 is exposed. As a result, a step is formed between the rear end surface 43d of the first wall 43 and the lower end surface 45d of the third wall 45 between the first wall 43 and the third wall 45 .

The first bolt hole 47 is arranged between imaginary lines L ₁ and L ₂ . In other words, the first bolt hole 47 is located between the centers of the _second bolt holes 48a, 48b, 48c on the imaginary line L1 and the centers of the _second bolt holes 48d, 48e, 48f on the imaginary line L2. , is formed on the first wall 43 . Note that the first bolt hole 47 may be arranged at the midpoint of the virtual lines L ₁ and L ₂ as long as it is arranged between the virtual lines L ₁ and L ₂ , or may be shifted from the midpoint. good too.

The second wall 44 and the fourth wall 46 face each other with a predetermined gap in the left-right direction. Typically, the second wall 44 and the fourth wall 46 are arranged in parallel. Also, the second wall 44 and the fourth wall 46 project forward from the third wall 45 . Since the front end surfaces 44c and 46e are inclined surfaces, the second wall 44 and the fourth wall 46 project less from the third wall 45 as the distance from the first wall 43 increases.

A second wall 44 and a fourth wall 46 are arranged at both ends of the third wall 45 in the left-right direction. The second wall 44 and the fourth wall 46 serve as reinforcing members that enhance the strength of the bracket 40 . And between the 3rd wall 45 and the 4th wall 46 is curved. On the other hand, the second wall 44 and the third wall 45 are not curved. In other words, the planar inner surface 44a of the second wall 44 and the planar inner surface 45a of the third wall 45 are linearly in contact (perpendicular).

FIG. 5 is a perspective view of the bracket 40 attached to the engine 10. As shown in FIG. 6 is a plan view of the bracket 40 attached to the engine 10. FIG. FIG. 7 is a front view of the bracket 40 attached to the engine 10. FIG.

As shown in FIGS. 5 to 7, the bracket 40 contacts the outer surface 45b of the third wall 45 with the side surface 12a of the flywheel housing 12 and the outer surface 44b of the second wall 44 at the step between the side surfaces 11a and 12a. It is fixed to the side surface 12a of the flywheel housing 12 by a bolt inserted through the second bolt hole 48 while facing each other.

At this time, as shown in FIG. 7, it is desirable to arrange the second wall 44 as close as possible to the step between the side surfaces 11a and 12a. On the other hand, as shown in FIG. 6, the fourth wall 46 may be off the side surface 12a of the flywheel housing 12 if all the second bolt holes 48 face the side surface 12a.

According to the above embodiment, for example, the following operational effects are obtained.

According to the above embodiment, of the left and right ends of the third wall 45, only the portion between it and the fourth wall 46 (that is, the left end) is curved, and the portion between it and the second wall 44 (that is, the right end) is curved. not Thereby, the plane portion for forming the second bolt hole 48 can be widened in the third wall 45 . As a result, it is possible to obtain the bracket 40 that can be attached to a narrow portion such as the side surface 12 a of the flywheel housing 12 .

Further, according to the above embodiment, the first wall 43 and the fourth wall 46, the first wall 43 and the third wall 45, the second wall 44 and the third wall 45 are brought into contact so as to form a step. As a result, the first angle 41 and the second angle 42 can be joined by fillet welding. As a result, the strength of bracket 40 can be improved.

Further, according to the above embodiment, since the first bolt holes 47 are arranged between the virtual lines L ₁ and L ₂ , the load applied to the bolts inserted through the plurality of second bolt holes 48 is leveled. can be made As a result, it is possible to prevent the load from concentrating on some bolts, so that the diameter of each bolt can be reduced. As a result, it is possible to further improve the mountability in narrow spaces.

In addition, in the above embodiment, the second wall 44 and the fourth wall 46 function as reinforcing members. However, the load applied to the second wall 44 and the fourth wall 46 increases downward (that is, closer to the first wall 43). Therefore, as in the above-described embodiment, the bracket 40 is appropriately reinforced by increasing the amount of forward protrusion of the second wall 44 and the fourth wall 46 downward (that is, closer to the first wall 43). can be done.

On the other hand, when inserting a bolt through the first bolt hole 47 , a tool is inserted from above the bracket 40 into the space surrounded by the second wall 44 , the third wall 45 and the fourth wall 46 . At this time, by shortening the amount of forward protrusion of the second wall 44 and the fourth wall 46 upward (that is, moving away from the first wall 43), when inserting the bolt into the first bolt hole 47, the tool Alternatively, the operator's hand can be prevented from interfering with the second wall 44 and the fourth wall 46 .

The above-described embodiments are illustrative examples of the present invention and are not intended to limit the scope of the present invention only to those embodiments. Those skilled in the art can implement the invention in various other forms without departing from the spirit of the invention.

Reference Signs List 1 hydraulic excavator 2 undercarriage 3 upper swing body 4 front work machine 4a boom 4b arm 4c bucket 4d, 4e, 4f hydraulic cylinder 5 revolving frame 6 counterweight 7 cab 8 track 9 building cover 9a base 10 engine 11 cylinder block 11a , 12a side surface 12 flywheel housing 13 exhaust pipe 20 post-treatment device 21 first post-treatment device 22 second post-treatment device 30, 40 bracket 41 first angle 42 second angle 43 first wall 44 second wall 45 third wall 46 fourth wall 47 first bolt holes 48, 48a, 48b, 48c, 48d, 48e, 48f second bolt holes 43a, 44a, 45a, 46a inner surface 43b, 44b, 45b, 46b outer surface 43c, 44c, 46e front end surface 43d , 44d rear end surface 43e left end surface 44e, 45c, 46c upper end surface 45e right end surface 46d lower end surface

Claims (4)

In the bracket that fixes the structure to the base,
a first angle in which a first wall and a second wall are bent into an L shape, and a first bolt hole through which a bolt for fixing the bracket to the base is inserted is formed in the first wall;
a third wall and a fourth wall bent into an L shape, and a second angle formed in the third wall with a second bolt hole through which a bolt for fixing the bracket to the structure is inserted;
The first angle and the second angle are such that the end surfaces of the third wall and the fourth wall abut the inner surface of the first wall, and the other end surface of the third wall is aligned with the inner surface of the second wall. wherein the second wall and the fourth wall are combined so as to face each other with a predetermined gap therebetween. A bracket according to claim 1, wherein
A bracket, wherein the first angle and the second angle abut to form a step and are joined by fillet welding the stepped portion. A bracket according to claim 1, wherein
The third wall is formed with the second bolt holes along imaginary lines spaced apart from each other in the facing direction of the second wall and the fourth wall,
A bracket, wherein the first bolt hole is formed in the first wall between centers of two of the second bolt holes. A bracket according to claim 1, wherein
The bracket, wherein the second wall and the fourth wall project from the third wall in a decreasing amount as the distance from the first wall increases.

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