JP4618269B2 - Construction machinery - Google Patents

Description

  The present invention relates to a construction machine on which an engine is mounted.

  Some construction machines such as cranes have an engine unit and a radiator mounted on the main body frame. Here, the engine unit is provided with a front fixed portion and a rear fixed portion fixed to the main body frame before and after the engine unit, and the radiator is fixed to the radiator fixed to the main body frame. Part. In the construction machine, the engine unit and the radiator are supported on the main body frame by individually fixing the front fixed portion, the rear fixed portion, and the radiator fixed portion to the main body frame. The

  Here, the operation of mounting the engine unit and the radiator on the main body frame is troublesome, and the operation of connecting the engine unit and the radiator to the main body frame is performed in a complicated space on the crane main body side. Is difficult to do. In particular, when the crane main body is downsized for transporting the construction machine itself in order to reduce the transportation cost, the connecting work is very troublesome. It is also difficult to adjust the relative position of the engine unit and the radiator on the main body frame.

On the other hand, Patent Document 1 discloses a hydraulic excavator in which the engine unit and the radiator are mounted on the main body frame via a support frame. The support frame is provided with a fixed portion to which a front fixed portion, a rear fixed portion of the engine unit, and a radiator fixed portion of the radiator are fixed, respectively. The side fixed portion and the radiator fixed portion of the radiator are fixed to the respective fixed portions, whereby the engine unit and the radiator are installed on the main body frame via the support frame. According to this structure, the engine unit and the radiator can be assembled to the main body frame at a time, and the labor for assembling the engine unit and the radiator individually in a narrow installation space of the hydraulic excavator body can be saved. Therefore, the efficiency of the assembly work is improved. In addition, the relative position between the engine unit and the radiator can be adjusted in advance on the support frame, so that work efficiency is improved.
JP-A-5-147444

  However, in the construction machine described in Patent Document 1, all of the front-side fixed portion, the rear-side fixed portion of the engine unit, and the radiator fixed portion of the radiator are fixed to the support frame. Since the frame requires at least the length from the rear fixed part of the engine unit to the radiator fixed part of the radiator, its weight increases, and the engine unit is assembled to the main body frame. There is a problem that work efficiency deteriorates when the engine unit is transported. Furthermore, there is a problem that the weight of the construction machine itself cannot be sufficiently reduced, and the cost for reducing the transportation cost of the construction machine itself cannot be secured sufficiently.

  In view of such circumstances, an object of the present invention is to provide a construction machine capable of reducing the weight around the engine unit while improving the working efficiency when the engine unit is assembled.

  As means for solving the problems, the present invention is a construction machine comprising an engine and a main body frame on which the engine is mounted, and is provided in front of the engine unit including the engine and the engine unit. A radiator, and a support frame for supporting the engine unit and the radiator on the main body frame in a state where the engine unit and the radiator are connected to each other, and the engine unit includes a front side cover provided on a front side portion thereof. A fixed portion and a rear fixed portion provided at a rear portion, the radiator has a radiator fixed portion, and the support frame is provided at a rear end of the support frame; The front fixed part of the engine is fixed to the front of the support frame and the front end of the support frame. A radiator fixing portion to which the radiator fixing portion is fixed; and a support frame fixing portion to be fixed to the main body frame, wherein the main body frame includes a support frame fixing portion to which the support frame fixing portion is fixed; A rear fixed portion to which a rear fixed portion of the engine unit is fixed, and the engine unit and the radiator include a front fixed portion of the engine unit fixed to the engine fixing portion and the engine unit and the radiator. With the radiator fixed part of the radiator fixed to the radiator fixing part, the support frame fixed part of the support frame is fixed to the support frame fixing part of the main body frame, and the rear fixed part of the engine unit The portion is fixed to the rear fixing portion of the main body frame, so that it is supported by the main body frame ( Motomeko 1).

  In this construction machine, only the front fixed portion and the radiator fixed portion of the front fixed portion and the rear fixed portion of the engine unit and the radiator fixed portion of the radiator are fixed to the support frame, Since the rear fixed portion of the engine unit is fixed to the main body frame without the support frame, the support frame can be reduced in size and weight. Moreover, since the engine unit and the radiator can be assembled to the engine unit in a state in which the engine unit and the radiator are integrated with each other, the assembling work is facilitated. In particular, when the engine has a fan and the radiator has a shroud covering the fan, the relative position between the fan and the shroud is adjusted in advance on the support frame side, not on the main body frame. Work efficiency is improved. The reduction in size and weight of the support frame as described above reduces the weight around the engine unit, improves the efficiency of the transport operation of the engine unit, and thus the overall assembly operation, and reduces the transportation cost of the construction machine itself.

  In the present invention, the support frame includes a left support frame and a right support frame that are spaced apart from each other on the left and right sides, and the right support frame includes a right portion of a front fixed portion of the engine unit. A right engine fixing portion to be fixed; a right radiator fixing portion to which a right portion of a radiator fixing portion of the radiator is fixed; and a right support frame fixing portion to be fixed to a right portion of the main body frame; The left support frame includes a left engine fixing portion to which a left portion of a front fixed portion of the engine unit is fixed, a left radiator fixing portion to which a left portion of a radiator fixed portion of the radiator is fixed, and the main body frame It is preferable to have a left side support frame fixed portion fixed to the left side portion.

  In this structure, the support frame is further reduced in weight, and the engine unit and the radiator can be stably supported. That is, the support frame is separated from the left and right, and is lighter than that of the left and right integrated. In addition, since the engine unit and the radiator are supported on the main body frame by the left and right support frames, stable support between the engine unit and the radiator is ensured.

  In particular, if the left support frame and the right support frame are separated from each other and only connected to each other only via the engine unit or the radiator, the entire support frame is more reliably reduced in weight. (Claim 3).

  Moreover, in this invention, it is preferable that the said support frame fixed part is provided in the rear-end part of the said support frame (Claim 4).

  In this structure, the front portion of the engine unit having a large mass is stably supported on the main body frame side via the support frame. For example, the support state of the engine unit is more stable and the load of the support frame is higher than that of the support frame fixed portion provided on the front end portion of the support frame, that is, the radiator fixed portion side. Less.

  In the present invention, the engine unit includes an output transmission member that is coupled to a rear end portion of the engine and transmits the output of the engine to the outside, and the rear fixed portion is provided on the output transmission member. (Claim 5).

  In this structure, since the main body frame supports the output transmission member provided at the rear end of the engine without the support frame, the output transmission member is supported more stably.

  As described above, in the construction machine according to the present invention, weight reduction around the engine unit can be realized while improving the efficiency of assembling the engine unit to the main body frame.

  An embodiment according to a construction machine of the present invention will be described with reference to FIGS. Here, the case where the construction machine is a crane will be described.

  FIG. 1 is a schematic side view showing the overall configuration of the crane 10, and FIG. 2 is a schematic top view showing a part of the crane 10 omitted.

  The crane 10 includes a revolving body 12, a traveling body 14 that supports the revolving body 12 in a turnable manner, and a work body 17 connected to the revolving body 12.

  The working body 17 includes a boom 16, a mast 18, a boom guy line 19, a main hook 40, auxiliary hooks 42, a plurality of sheaves, and a plurality of winches.

  The boom 16 and the mast 18 rotate in the undulation direction in conjunction with each other. The boom 16 and the mast 18 are connected to the revolving body 12 so that the base ends thereof are rotatable in the up-and-down direction, and the tip ends are connected to each other via the boom guy line 19.

  A boom hoisting winch 20 is attached near the base end of the mast 18. The boom hoisting winch 20 winds and unwinds the boom hoisting rope 21, and the boom hoisting rope 21 is routed so that the mast 18 is rotated by the winding and unwinding. Specifically, a sheave block 30 in which a plurality of sheaves are arranged at the tip of the mast 18 is provided, and a sheave block 31 corresponding to the sheave block 30 is provided at the rear end of the revolving structure 12 (see FIG. 2). The boom hoisting rope 21 is stretched between the sheave blocks 30 and 31. The boom hoisting winch 20 changes the distance between the sheave blocks 30 and 31 by winding and unwinding the boom hoisting rope 21, whereby the mast 18 and the boom 16 interlocked therewith. Is rotated in the undulation direction.

  The boom 16 is equipped with a main winding winch 22 and an auxiliary winding winch 24 for winding and lowering the suspended load.

  The main winding winch 22 winds and unwinds the main winding rope 44, thereby winding and lowering the suspended load by the main winding rope 44. Specifically, a main winding sheave block 32M is rotatably provided at the tip of the boom 16, and a plurality of sheaves are arranged adjacent to the main winding guide sheave 32M. 36, the main winding rope 44 drawn from the main winding winch 22 is hung on the main winding guide sheave 32M, and the main winding sheave block 36 and the main load sheave block It spans between the sheave block 37 provided on the hook 40. Accordingly, the main winding winch 22 changes the distance between the sheave blocks 36 and 37 by winding and unwinding the main winding rope 44, thereby winding and lowering the main hook 40. .

  Similarly, the auxiliary winding winch 24 winds and unwinds the auxiliary winding rope 46, thereby winding and lowering the suspended load by the auxiliary winding rope 46. Specifically, an auxiliary winding guide sheave 32S is rotatably provided coaxially with the main winding guide sheave 32M, and a point sheave 34 is rotatably provided at a position adjacent to the auxiliary winding guide sheave 32S. The auxiliary winding rope 46 drawn out from the auxiliary winding winch 24 is hung on the auxiliary winding guide sheave 32S and is suspended from the point sheave 34. Therefore, the auxiliary winding winch 24 winds up and lowers the auxiliary hook 42 for suspended loads connected to the end of the auxiliary winding rope 46 by winding and feeding out the auxiliary winding rope 46.

  Each winch has a hydraulic motor and a drum, and the drum is rotated and driven by the hydraulic motor to wind and feed the rope. The hydraulic motor operates in response to supply of oil at a predetermined pressure from a hydraulic pump (not shown) that operates in response to an output of an engine 51 described later.

  The revolving body 12 has a pair of side walls 12a and 12a having a plurality of cross beams 71a and 71b (see FIGS. 3 and 4. In each figure, only two cross beams 71a and 71b are shown for convenience. One lateral beam is referred to as a front lateral beam 71a, and the other lateral beam is referred to as a rear lateral beam 71b. Near the center of the main body frame 70, an engine housing portion 12b for housing an engine unit 50 and the like to be described later is provided.

  FIG. 3 shows a schematic side view of the engine unit 50 and the like in a state accommodated in the engine accommodating portion 12b, and FIG. 4 shows a schematic top view thereof. In FIG. 3, the side wall 12a is not shown for convenience.

  The engine housing portion 12b houses an engine unit 50, a radiator 60, and a support frame 80 therein. In the engine housing portion 12b, as shown in FIG. 3 or FIG. 4, the front side portion of the engine unit 50 and the radiator 60 are connected to the support frame 80 through the support frame 80. The rear part of the engine unit 50 is supported by the rear lateral beam 71b without a support frame 80, while being supported on the lateral beam 71a.

  The front lateral beam 71a and the rear lateral beam 71b are arranged in parallel to each other, and have a support frame fixing part 72 and a rear side fixing part 74, respectively.

  The support frame fixing portion 72 includes a horizontally extending flange formed at the upper end portion of the front side beam 71a, and a support frame fixed portion 85 (to be described later) of the support frame 80 is fixed to the upper surface thereof with a bolt or the like. .

  The rear side fixing portion 74 is a plate material extending in the horizontal direction, and protrudes left and right outward from the upper end of a connecting wall 74a extending upward from the rear side beam 71b. On the upper surface of the rear side fixing portion 74, a rear side fixed portion 54b (described later) provided in the engine unit 50 is fixed with a bolt or the like.

  The engine unit 50 includes an engine 51, a cooling fan 52, and a power divider (output transmission member) 54. In the engine unit 50, the power divider 54 distributes the output of the engine 51 to a plurality of hydraulic pumps for supplying predetermined oil to hydraulic motors (not shown) provided in the winches and the traveling body 14, respectively. To do.

  The engine 51 is provided with front fixed portions 51b on the left and right sides of the front portion of the main body 51a. The front-side fixed portion 51b extends outward from the lower end portion of the connection plate 51c connected to the left and right side walls of the main body portion 51a of the engine 51. The front-side fixed portion 51b is fixed to an engine fixing portion 83, which will be described later, provided on the support frame 80 with a bolt or the like via a vibration isolating rubber 100.

  The cooling fan 52 blows air to the radiator 60 and cools the radiator 60. The cooling fan 52 is connected to the front end portion of the engine 51 via a rotating shaft 53.

  As described above, the power divider 54 distributes the output of the engine 51 to the plurality of hydraulic pumps. The power divider 54 is connected to the rear end portion of the engine 51 via an output shaft 55. The power divider 54 is provided with rear fixed portions 54b fixed to the rear fixing portions 74 of the rear lateral beams 71b via the anti-vibration rubber 100 at the left and right lower ends of the main body portion 54a. It has been.

  The rear fixed portion 54b extends outward from a lower end portion of a connection plate 54c connected to the left and right side walls of the main body portion 54a of the power divider 54. The rear fixed portion 54b is formed with a plurality of bolt holes that penetrate vertically and allow predetermined bolts 112 to be inserted therethrough. Then, the bolt 112 inserted through these bolt holes fastens the rear fixed portion 54b and the rear fixed portion 74 of the rear lateral beam 71b with the anti-vibration rubber 100 interposed therebetween, The rear fixed portion 54 b is fixed to the rear fixing portion 74. By this fixing, the power divider 54 and the rear portion of the engine unit 50 are fixed to the rear lateral beam 71b, that is, the main body frame 70. Specifically, the bolt 112 is formed in a state in which a vibration isolating rubber 100 is interposed between a lower surface of the rear fixing portion 74 and an upper surface of a washer 120 attached below the rear fixing portion 74. The rear fixing portion 74 and the rear fixed portion 54b are fastened by screwing with a nut 114 attached to the lower surface of 120.

  The radiator 60 is for cooling the cooling water or the like of the engine 51. The radiator 60 includes a radiator main body 61 and a shroud 62. The radiator body 61 is formed in a substantially rectangular parallelepiped shape. The shroud 62 covers the cooling fan 52 and is formed in a substantially cylindrical shape that protrudes rearward, that is, toward the engine unit 50 from the rear surface of the radiator body 61. Here, the weight of the radiator 60 is sufficiently smaller than that of the engine unit 50.

  The radiator 60 is provided with a radiator fixed portion 63 that is fixed to a radiator fixing portion 84 (to be described later) of the support frame 80 at the lower left and right ends thereof. The radiator 60 is fixed to a position in front of the engine unit 50 and the shroud 62 covering the cooling fan 52 by fixing the radiator fixed portion 63 to the radiator fixing portion 84. The

  The support frame 80 supports the engine unit 50 and the radiator 60 on the front lateral beam 71 a of the main body frame 70 in a state where the front side portion of the engine unit 50 and the radiator 60 are connected. The support frame 80 includes a left support frame 80L and a right support frame 80R that are spaced apart from each other and are separated from each other. The left main body block 82, the right main body block 82 (hereinafter referred to as the main body block 82), and the left engine fixed Portion 83, right engine fixing portion 83 (hereinafter referred to as engine fixing portion 83), left radiator fixing portion 84, right radiator fixing portion 84 (hereinafter referred to as radiator fixing portion 84), left support frame fixed portion 85, and right support frame fixed portion 85. (Hereinafter referred to as support frame fixed portion 85). Here, the left support frame 80L and the right support frame 80R have a symmetrical structure. FIG. 5 is a side view and a rear view of the support frame 80 and the front fixed portion 51b in a state where the front fixed portion 51b of the engine 51 is fixed to an engine fixing portion 83 (to be described later) of the support frame 80, respectively. (A) and (b).

  The support frame 80 extends from the front portion of the engine 51 to the front end of the radiator 60. Specifically, it extends from the front fixed portion 51 b of the engine 51 to the radiator fixed portion 63 of the radiator 60.

  The main body block 82 is a structure composed of a plurality of standing walls 82a and lateral walls 82b. The main body block 82 has a shape extending from the front fixed portion 51b of the engine 51 in the left-right direction and extending forward from the tip.

  The engine fixing portion 83 is a portion to which the front fixed portion 51b of the engine 51 is fixed. The engine fixing portion 83 is a plate-like member that extends in parallel with the front-side fixed portion 51 b of the engine 51 and is provided at the rear end of the main body block 82. The engine fixing portion 83 is formed with a plurality of bolt holes that penetrate vertically and allow predetermined bolts 112 to be inserted therethrough. Then, the bolt 112 inserted through these bolt holes fastens the engine fixing portion 83 and the front side fixed portion 51b of the engine 51 with the anti-vibration rubber 100 interposed therebetween, whereby the engine fixing portion A front-side fixed portion 51 b of the engine 51 is fixed to the upper surface of 83 through the vibration-proof rubber 100. More specifically, the bolt 112 has a vibration isolating rubber 100 interposed between the lower surface of the engine fixing portion 83 and the upper surface of the washer 120 attached below the engine fixing portion 83. The engine fixing portion 83 and the front side fixed portion 51b are fastened by screwing with a nut 114 attached to the lower surface.

  Here, a rib 51g is formed between the front fixed portion 51b and the connection plate 51c connected to the front fixed portion 51b, and the main body portion of the engine 51 connected to the connection plate 51c. 51a is configured to be stably supported by the engine fixing portion 83 through the connection plate 51c and the front-side fixed portion 51b.

  The radiator fixing portion 84 is fixed to the radiator fixed portion 63 of the radiator 60. The radiator fixing portion 84 is provided at the front end portion of the main body block 82. The radiator fixing portion 84 is formed with a plurality of bolt holes penetrating in the vertical direction and allowing predetermined bolts 112 to be inserted therethrough. Then, the bolt 112 inserted through these bolt holes fastens the radiator fixing portion 84 and the radiator fixed portion 63 of the radiator 60, whereby the radiator fixed portion 63 is fixed to the radiator fixing portion 84.

  As described above, the support frame 80 has the engine fixing portion 83 fixed to the front fixed portion 51b of the engine 51, and the radiator fixing portion 84 fixed to the radiator fixed portion 63 of the radiator 60. Thus, the front side portion of the engine unit 50 including the engine 51 and the power divider 54 is connected to the radiator 60.

  The support frame fixed portion 85 is fixed to the support frame fixing portion 72 provided on the front lateral beam 71 a of the main body frame 70. The support frame fixed portion 85 is provided at the rear end portion of the main body block 82. The support frame fixed portion 85 has a shape extending substantially horizontally and constitutes a bottom wall of the support frame 80. The support frame fixed portion 85 is formed with a plurality of bolt holes that penetrate vertically and allow predetermined bolts 112 to be inserted therethrough. The bolts 112 inserted through these bolt holes fasten the support frame fixed portion 85 and the support frame fixed portion 72, so that the support frame fixed portion 85 is connected to the front lateral beam 71 a of the main body frame 70. The support frame fixing portion 72 is fixed.

  As described above, the support frame 80 has the support frame fixed portion 85 fixed to the support frame fixing portion 72 of the main body frame 70, so that the engine unit 50 and the radiator 60 are connected to the main body frame 70. To support.

  Next, a procedure for mounting the engine unit 50 and the radiator 60 on the main body frame 70 will be described. FIG. 6 is a top view showing a state in which the support frame 80 is fixed at a predetermined position using a positioning jig 110 described later.

  First, the engine unit 50 and the radiator 60 are connected by the support frame 80. Here, this connection is performed using the positioning jig 110. The positioning jig 110 has the same length as the radiator 60 in the left-right direction. Further, the positioning jig 110 is fixed at the same position as the radiator fixed portion 63 of the radiator 60, that is, the radiator fixed portion 63 is fixed. A temporary fixed portion 163 configured to be fixed to the radiator fixing portion 84 of the support frame 80 is provided.

  As shown in FIG. 6, the temporarily fixed portions 163 of the positioning jig 110 are respectively fixed to the radiator fixing portions 84 of the support frame 80. As a result, the left and right positions of the support frame 80 are fixed. That is, the left support frame 80L and the right support frame 80R are disposed at appropriate positions in the left-right direction.

  Next, the engine unit 50 is placed on the support frame 80 so that the front-side fixed portion 51 b of the engine 51 is disposed at a position corresponding to the engine fixing portion 83 of the support frame 80. At this time, the anti-vibration rubber 100 is interposed between the front side fixed part 51b and the engine fixing part 83. Then, the front-side fixed portion 51b and the engine fixing portion 83 are in a state where the anti-vibration rubber 100 is sandwiched between them, and between the lower surface of the engine fixing portion 83 and the upper surface of the washer 120. Fastening with bolts 112 with rubber 100 sandwiched. Thereby, the front side part of the engine unit 50 is fixed to the support frame 80 on both the left and right sides. Thereafter, the positioning jig 110 is removed from the support frame 80.

  Next, the radiator 60 is disposed at a position where the shroud 62 covers the cooling fan 52 without interfering with the cooling fan 52, and the radiator fixed portion 63 of the radiator 60 and the radiator fixing portion of the support frame 80. 84 is fastened with a bolt 112, and the radiator 60 is fixed to the radiator fixing portion 84. Thereby, the engine unit 50 and the radiator 60 are integrated.

  Next, the integrated engine unit 50, radiator 60, and support frame 80 are carried into the engine housing portion 12b. Specifically, the integrated engine unit 50, the radiator 60, and the support frame 80 are lifted by a loading crane or the like, and the engine unit 50 or the like is supported by the support frame fixed portion 85 of the support frame 80. The rear side fixed portion 54b of the power divider 54 is arranged at a position corresponding to the rear side fixing portion 74 of the rear side horizontal beam 71b so as to be arranged at a position corresponding to the support frame fixing portion 72 of the front side cross beam 71a. They are placed on the transverse beams 71a and 71b, that is, on the main body frame 70 so as to be arranged.

  After that, the support frame fixed portion 85 and the support frame fixing portion 72 are fastened with bolts 112, and the anti-vibration rubber 100 is sandwiched between the rear fixed portion 54b and the rear fixed portion 74. The engine unit 50 is supported on the main body frame 70 only by fastening with the bolts 112 in the depressed state. Specifically, the support frame fixed portion 85 and the support frame fixing portion 72 are fastened with bolts 112, and the support frame fixed portion 85 is fixed to the support frame fixing portion 72. Accordingly, the front portion of the engine unit 50 and the radiator 60 are supported by the front lateral beam 71a of the main body frame 70 via the support frame 80. Further, the anti-vibration rubber 100 is sandwiched between the rear-side fixed portion 54b and the rear-side fixing portion 74, and between the lower surface of the rear-side fixing portion 74 and the upper surface of the washer 120. In a state where the vibration rubber 100 is sandwiched, the bolt 112 is used to fasten the rear fixed portion 54 b to the rear fixing portion 74. Accordingly, the rear portion of the engine unit 50 is supported on the rear lateral beam 71b of the main body frame 70.

  As described above, according to the present invention, of the front fixed portion 51b and the rear fixed portion 54b of the engine unit 50 and the radiator fixed portion 63 of the radiator 60, the front fixed portion 51b and the radiator fixed portion are included. Since only the fixing portion 63 is fixed to the support frame 80 and the rear fixed portion 54b is fixed to the main body frame 70 without the support frame 80, the support frame 80 is reduced in size. As a result, the weight around the engine unit 50 is reduced, the efficiency of the transfer work and the like when the engine unit 50 is assembled is improved, and the weight of the crane 10 as a whole is reduced. In particular, when the cooling fan 52 is connected to the engine unit 50 and the radiator 60 is provided with the shroud 62 that covers the cooling fan 52 as described above, the engine unit 50 and the radiator 60 Since the relative position is adjusted when the support frame 80 is attached, the accuracy of the relative position is ensured, and interference between the cooling fan 52 connected to the engine unit 50 and the shroud 62 of the radiator 60 can be avoided. It becomes.

  Further, if the support frame 80 is composed of a left support frame 80L and a right support frame 80R that are spaced apart from each other on the left and right, the support frame 80 can be further reduced in weight. In addition, since the left and right sides of the engine unit 50 and the radiator 60 are supported on the main body frame 70 by the left support frame 80L and the right support frame 80R, respectively, stable support between the engine unit 50 and the radiator 60 is ensured. Is done. In particular, if these support frames 80 are independently separated and are connected to each other only via the engine unit 50 or the radiator 60, it is necessary to provide a connecting member or the like for connecting the left and right support frames 80. Therefore, the entire support frame 80 is more reliably reduced in weight.

  Further, if the support frame fixed portion 85 is provided at the rear end portion of the support frame 80, the front portion of the engine unit 50 having a large mass is stabilized on the main body frame 70 side via the support frame 80. Therefore, the support state of the engine unit 50 is more stable and the strength of the support frame 80 is less than that in which the support frame fixed portion 85 is provided at the front end portion of the support frame 80. Become.

  Further, when a power divider 54 that transmits the output of the engine 51 to the outside is connected to the rear end portion of the engine 51, the main body can be provided by providing the rear fixed portion 54 b in the power divider 54. Since the frame 70 directly supports the power divider 54, the power divider 54 is supported more stably.

  Here, although this embodiment demonstrated as the crane 10 as the said construction machine which concerns on this invention, this construction machine is not restricted to a crane.

  The present invention also includes the left support frame 80L and the right support frame 80R integrated in the left-right direction. However, if the left support frame 80L and the right support frame 80R are separated as in the above-described embodiment, effects such as the weight reduction of the support frame 80 can be obtained.

  The specific structure of the support frame 80 is not limited to the above. The power divider 54 may be omitted, and the rear fixed portion 54 b may be provided in the rear portion of the engine 51.

  In the above embodiment, the case where the front fixed portion 51b of the engine 51 and the engine fixing portion 83 of the support frame 80 are fastened with the anti-vibration rubber 100 interposed therebetween is shown. Instead of the anti-vibration rubber 100, a structure for suppressing vibration may be provided in the support frame 80. In this case, the front side fixed portion 51 b is directly fixed to the engine fixing portion 83. Similarly, the anti-vibration rubber 100 between the rear fixed portion 54b of the power divider 54 and the rear fixed portion 74 of the rear lateral beam 71b may be omitted. In this case, the rear fixed portion 54 b is directly fixed to the rear fixed portion 74.

1 is a schematic side view of a crane according to an embodiment of the present invention. It is a schematic top view of FIG. It is a schematic side view which shows support structures, such as an engine unit, in the crane shown in FIG. FIG. 4 is a schematic top view of FIG. 3. (A) It is a schematic side view of the support frame shown in FIG. (B) It is a rear view of (a). It is explanatory drawing for demonstrating the mounting points, such as an engine unit shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Crane 12 Revolving body 14 Traveling body 16 Boom 17 Working body 18 Mast 50 Engine unit 51 Engine 52 Cooling fan 54 Power divider (output transmission member)
54b Rear fixed portion 51b Front fixed portion 60 Radiator 62 Shroud 63 Radiator fixed portion 70 Body frame 72 Support frame fixing portion 74 Rear fixing portion 80 Support frame 80R Right support frame 80L Left support frame 83 Engine fixing portion 84 Radiator Fixed part 85 Support frame fixed part 100 Anti-vibration rubber

Claims (5)

A construction machine comprising an engine and a main body frame on which the engine is mounted,
An engine unit including the engine;
A radiator provided in front of the engine unit;
A support frame for supporting the engine unit and the radiator on the main body frame in a state where the engine unit and the radiator are coupled;
The engine unit has a front fixed portion provided in a front portion thereof, and a rear fixed portion provided in a rear portion thereof,
The radiator has a radiator fixed portion,
The support frame is provided at a rear end of the support frame to fix a front fixed portion of the engine unit, and is provided at a front end of the support frame to fix the radiator fixed portion. A radiator fixing portion and a support frame fixed portion fixed to the main body frame;
The main body frame has a support frame fixing portion to which the support frame fixing portion is fixed, and a rear side fixing portion to which a rear side fixing portion of the engine unit is fixed,
The engine unit and the radiator are supported by the support frame in a state where a front fixed portion of the engine unit is fixed to the engine fixing portion and a radiator fixed portion of the radiator is fixed to the radiator fixing portion. The frame fixed portion is fixed to the support frame fixing portion of the main body frame, and the rear fixed portion of the engine unit is fixed to the rear fixed portion of the main body frame, thereby being supported by the main body frame. Construction machinery characterized by that. The construction machine according to claim 1,
As the support frame, having a left support frame and a right support frame that are spaced apart from each other on the left and right,
The right support frame includes a right engine fixing portion to which a right portion of a front fixed portion of the engine unit is fixed, a right radiator fixing portion to which a right portion of a radiator fixed portion of the radiator is fixed, and the main body frame Right side support frame fixed portion fixed to the right side portion of
The left support frame includes a left engine fixing portion to which a left portion of a front fixed portion of the engine unit is fixed, a left radiator fixing portion to which a left portion of a radiator fixed portion of the radiator is fixed, and the main body frame And a left support frame fixed portion fixed to the left portion of the construction machine. The construction machine according to claim 2,
The construction machine, wherein the left support frame and the right support frame are separated from each other and are connected to each other only through the engine unit and the radiator. In the construction machine in any one of Claims 1-3,
The construction machine according to claim 1, wherein the support frame fixed portion is provided at a rear end portion of the support frame. In the construction machine in any one of Claims 1-4,
The engine unit includes an output transmission member that is coupled to a rear end portion of the engine and transmits the output of the engine to the outside.
A construction machine, wherein the output transmission member is provided with the rear fixed portion.

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