JP5702004B1 - Engine cooling system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To develop a device capable of sufficiently exerting cooling performance which has not been used up in the past by directing cooling air uniformly to a radiator body. An engine cooling device of the present invention rotates a radiator main body 61 through which coolant of the engine 4 is guided, a radiator fan 63 that blows cooling air, a shroud 62 that prevents escape of cooling air, and the radiator fan 63. In an apparatus for cooling the engine 4 by cooling the cooling liquid in the radiator main body 61 with the cooling air, the fan main body 64 and the radiator fan 63 are provided. A plurality of flow guide blades 606 that converge from the periphery toward the center are provided between them, and thereby the cooling air generated by the radiator fan 63 is guided to the entire area of the radiator main body 61. It is. [Selection] Figure 1

Description

  The present invention relates to an engine cooling apparatus to which an internal combustion engine is applied.

As a cooling system for internal combustion engines, a liquid cooling method using water as a cooling medium is generally adopted. Cooling air is effectively guided to the radiator body with the assistance of a cooling fan. Then, the coolant circulating at a high temperature is cooled, and the engine is cooled again by circulating around the combustion chamber and cylinder of the engine.
By the way, in such a cooling mode, in the case of a so-called push-in type in which cooling air is blown to the radiator body by a cooling fan, the entire range of the radiator body does not effectively perform the cooling action. Specifically, the cooling air is not effectively sent to the front part of the fan boss which is the center of the cooling fan, and as a result, the central part of the radiator main body corresponding to this part is not sufficiently cooled. . In other words, if the radiator main body is viewed alone, even if it has sufficient cooling performance, the cooling air supply state is not sufficient and the cooling performance is not sufficiently exhibited. In other words, while applying a small radiator main body, the cooling air can be sufficiently cooled even when applied to a larger engine by improving the blowing state of the cooling air.
When viewed from an actual device, for example, in the case of a pavement material cutting device in which a push-type engine cooling method is often employed, when a required cutting depth increases, a large engine is required accordingly. On the other hand, the overall shape of the apparatus requires current dimensional specifications and cannot be enlarged. As long as there is such a request, the radiator main body, which is a main member of the cooling device, must be applied with a specification applied to a conventional small engine. However, even though a small radiator body is naturally applied, it is required to exhibit sufficient performance for cooling a large engine.

JP 2012-002022 A

  The present invention has been made in consideration of such actual demands, and by uniformly directing the cooling air to the radiator main body, the cooling performance which has not been used up in the past has been achieved. The technical issue is the development of a device that can be fully used.

The engine cooling device according to claim 1,
A radiator body to which engine coolant is guided, a radiator fan that blows cooling air to the radiator body, a shroud that surrounds the radiator fan to prevent escape of cooling air, a fan pulley that transmits rotation to the radiator fan, and this fan pulley A device for cooling the engine by cooling the coolant in the radiator body with cooling air from the radiator fan,
A plurality of flow guide blades that converge from the periphery toward the center are provided between the radiator body and the radiator fan, and the cooling air generated by the radiator fan is guided by the flow guide blades over the entire area of the radiator body. On the other hand, the shroud has a funnel portion surrounding the radiator fan having a slightly larger shape so as not to interfere with the peripheral edge of the radiator fan, and a fan pulley for transmitting rotation to the radiator fan is used for transmitting rotation. In order to adjust the tension of the fan belt, the installation position of the fan belt can be freely changed, and the shroud surrounding the radiator fan also moves in accordance with the change of the installation position of the fan pulley .

In addition to the requirement of claim 1, the engine cooling device according to claim 2 has a fan bracket that supports the fan pulley as appropriate for a configuration for changing the installation position of the fan pulley that transmits rotation to the radiator fan. The fan bracket body fixed to the peripheral member of the fan and the movable fan bracket that directly supports the fan pulley, while the configuration in which the shroud moves is compared with the radiator stand that is the shroud support member. The shroud is slidably supported by a guide, and the shroud and the movable fan bracket are connected so that the shroud moves in response to the movement of the radiator fan. It is.

  In addition to the requirements of the first or second aspect, the engine cooling device according to a third aspect of the present invention is configured such that each of the diversion blades is curved in an S shape in a front view and is formed into a deformed spiral as a whole. It is characterized by this.

  The engine cooling device according to a fourth aspect is characterized in that, in addition to the requirements of the first, second, or third aspect, with respect to the flow guide blade, a width dimension near a peripheral portion is narrower than other portions. It consists of

  According to a fifth aspect of the present invention, in addition to the requirements of the first, second, third, and fourth aspects, the flow guide blade is provided in a radiator stand that is a member that supports a radiator main body and a shroud. It is characterized by this.

The engine cooling device according to claim 6 is characterized in that the device according to any one of claims 1 to 5 is applied to a pavement material cutting device.

First, according to the first aspect of the present invention, the cooling air is directed to the entire range including the central portion of the radiator main body, and the original performance of the radiator main body can be fully exhibited. In addition, the shroud is shaped so as to surround the periphery of the radiator fan almost closely, and the cooling air generated by the radiator fan is prevented from being dissipated to the outside and supplied so that it is directed forward. Is done. In addition, the installation position of the fan pulley integrated with the radiator fan can be freely changed to adjust the tension of the fan belt, and the configuration of the drive transmission system on the fan pulley side can be simplified. In addition, the shroud can be moved together with the radiator fan, and the space between the shroud and the radiator fan can be formed closely. Therefore, it is not necessary to make the shroud into an oval shape to allow the radiator fan to move. It is possible to prevent wasteful release.

According to the second aspect of the present invention, in order to change the installation position of the fan pulley, this is achieved by a combination of the fan bracket body and the movable fan bracket, while the shroud is moved in such a manner that the shroud and the radiator stand are slid. It can be moved freely and can have a rational configuration.

According to the third or fourth aspect of the present invention, the flow guide blade is curved in an S shape and is formed in a deformed spiral shape as a whole. Although it is configured more narrowly and has not been fully analyzed in terms of hydrodynamics, this allows the cooling air to be directed evenly including the center of the cooling fan to the front of the cooling fan, and to cool the radiator body evenly Can do.

According to the fifth aspect of the present invention, a radiator stand is used as an arrangement portion of the flow guide blade, and a rational arrangement can be achieved.

According to the invention described in claim 6 , sufficient performance for cooling a large engine is exhibited while a small radiator main body is applied, and a large engine can be mounted without increasing the external dimensions of the paving material cutting device. It becomes. As a result, an apparatus capable of deep cutting with the same ease of handling as the conventional machine can be obtained.

It is a perspective view which shows the pavement material cutting device to which this invention is applied, and also shows a decomposition | disassembly state. It is a disassembled perspective view which mainly shows the drive system member from the engine of the same apparatus to a cutter blade. It is a disassembled perspective view which shows the cooling device of the engine of an apparatus same as the above. It is a side view which shows the cutter blade drive system member of an apparatus same as the above. It is sectional drawing in the vv line | wire in FIG. 4 which shows the assembly state of the output shaft periphery of an apparatus same as the above. It is the front view (a) of the engine cooling device of an apparatus same as the above, and the top view (b). It is a top view same as the above. It is a front view which shows the state of tension adjustment of the fan belt in the cooling device of the engine of an apparatus same as the above. It is a side view which shows the movable support structure of the shroud in the cooling device of the engine of an apparatus same as the above.

  The mode for carrying out the present invention includes an embodiment described below, and also includes embodiments that are variously improved based on this technical idea.

Hereinafter, the present invention will be specifically described based on illustrated embodiments.
First, reference numeral 1 denotes a pavement material cutting device as an example to which the present invention is applied. This device acts on a pavement surface P to form a cutting groove Ps. Although the name of the device is a cutting device, a cutting groove or the like may be processed, and it may not always be cut, but it is commonly used as the device name. As for the outline of this, first, the wheel device 2 is provided for the main body body 10 and can be moved by driving the engine or pushing and pulling by an operator as appropriate. And the engine 4 which applied the internal combustion engine which drives the cutter apparatus 3 and the wheel apparatus 2 in the main body 10 is provided.
The present invention relates to a device for cooling the engine 4.

Hereinafter, the pavement material cutting device 1 will be specifically described.
First, the body body 10 is provided with a cover panel 11 that covers the internal mechanism with respect to the chassis frame 100, in which the engine 4, various devices of the drive system from the engine 4 to the cutter device 3, and cooling of the engine are provided. A device for performing operation and various devices for an operation transmission system are provided. Moreover, the gauge rod 12 which can be laid down so that it may extend ahead of the main body 10 is provided, and this gauge rod 12 is provided with the roller 122 for moving the gauge piece 121 and the pavement surface P smoothly at the front-end | tip. It is.
Further, the main body 10 is provided with a forward operation handle 13 extending rearward thereof and an elevating operation handle 14.

Next, the wheel device 2 provided below the main body 10 will be described.
As the wheel device 2, a main wheel 21 is provided at the rear of the device. In the following, in this embodiment, the operator pushes the pavement material cutting device 1 in a state where the advance operation handle 13 is steered, and the moving direction is defined as the front. The main wheel 21 may be one that freely rolls or may be driven in consideration of an operation load or the like as appropriate. In driving, it is preferable that the HST device is driven by a hydraulic pump driven by the engine 4 to adjust the speed of the wheel and perform forward and reverse rotation.
Further, a sub wheel 22 is provided in front of the main wheel 21. The auxiliary wheel 22 is provided at the tip of the auxiliary wheel arm 23, and the base of the auxiliary wheel arm 23 is supported by an arm pivot 231, and although not shown, a link member or the like extending from the arm pivot 231 is used as the auxiliary wheel arm. The main body 10 can be set to an appropriate angle from the front-up state to the substantially horizontal state by rotating the head 23 by a certain angle. This setting operation is performed by the elevating operation handle 14.
Incidentally, when performing a normal cutting operation of the pavement surface P, the main body 10 is operated with its lower surface substantially horizontal.

Next, the cutter device 3 will be described.
The cutter device 3 has a cutter blade 30 as a main member, and this is attached to an outer end portion of a main shaft 32 supported by a bearing 31 attached to the lower surface of the main body 10. The rotation is transmitted from the engine 4 to the main shaft 32, and the cutter blade 30 is rotationally driven.

Hereinafter, the engine 4 serving as a driving source of the cutter blade 30, the cutter driving system device 5 that transmits the output of the engine 4, and the cooling system device 6 of the engine 4 will be described.
First, reference numeral 40 denotes an engine body, which is mounted with a crankshaft arranged so as to be orthogonal to the moving direction of the pavement material cutting device 1 when mounted on the chassis frame 100 of the body body 10. Is done. That is, the engine 4 is in a so-called horizontal state. The engine body 40 includes a flywheel 401 as an output end, and the flywheel 401 is provided on the side surface opposite to the cutter blade 30 as an example. The engine block 402 is mounted on the chassis 110 via an adapter-like engine base 41. The engine base 41 includes a mounting bracket 410 for mounting on the chassis 110 at an appropriate position. The chassis 110 and the mount bracket 410 are attached to the main body 10 in a shock-proof manner via rubber bushes 411.
Of course, the engine base 41 and the engine block 402 are appropriately fixed by fixing bolts, and the engine base 41 is integrated with the engine block 402 so to speak.

Further, an output shaft 42 is connected to the flywheel 401 of the engine body 40 in a fixed state. That is, the output shaft 42 includes a flange 421 and a shaft-like pulley shaft 422, and the portion of the flange 421 is fixed to the outer surface of the flywheel 401 with a bolt or the like. As a result, the output shaft 42 is provided so as to protrude from the flywheel 401. The output pulley 43 is provided in a state in which the output pulley 43 is fixed in the rotational direction by a key structure so as to be fitted onto the pulley shaft 422 of the output shaft 42.
A pulley groove is provided on the outer peripheral portion of the output pulley 43. The pulley groove includes a blade pulley groove 431 and an auxiliary machine system pulley groove 432. That is, the blade pulley groove 431 is a groove for winding a belt for driving the cutter blade 30, while the auxiliary system pulley groove 432 drives the oil pump of the HST mechanism when the apparatus is automatically driven, for example. In addition, a belt for driving a vacuum pump for collecting cutting powder is wound.

A support bracket 44 is provided as a support structure for the output shaft 42 and the output pulley 43.
That is, the support bracket 44 supports the distal end side (free end side) of the output shaft 42 and includes a bracket stay 441 and a bearing case holder 442. The bracket stay 441 is formed integrally with the engine base 41 and protrudes from the engine base 41 in the same direction as the protruding direction of the output shaft 42.
A female thread 441 a is formed on the end surface of the tip of the bracket stay 441, and the bearing case holder 442 is fixed by a fastening bolt 444 using this part. As a result of such a configuration, the support bracket 44 takes a form in which it is fixed to the engine block 402 as a whole.

Further, the bearing case holder 442 is provided with a circular hole-shaped bearing space 442a at the tip, and a bolt hole 442b corresponding to the 441a on the base end side. The output shaft 42 is supported by the bearing 45 with respect to the bearing case holder 442. In this supporting state, the bearing case 451 that supports the bearing 45 is first attached so as to be fitted into the bearing space 442 a of the bearing case holder 442 in the support bracket 44. In attaching the bearing case 442, an O-ring groove 442c is formed in the bearing space 442a of the bearing case holder 442, and the O-ring 453 is fitted therein to hold the bearing case 451 in a floating support state. Then, the end portion of the output shaft 42 is fixed by a shaft fixing bolt 455 through an appropriate spacer 454. On the other hand, a bearing case stopper 456 is applied to the outer surface of the bearing case 451, and the bearing case holder 442 in the support bracket 44 is sandwiched between the bearing case 451 and the bearing case stopper 456 by bolting the both. Fix it. As a result, the output shaft 42 is supported at the tip with respect to the support bracket 44 and is in a state where both ends of the flywheel 401 side and the tip are supported. On the other hand, when viewed as a support mode by the support bracket 44, the support bracket 44 supports the output shaft 42 in a cantilever state as shown in FIG. The bracket stay 441 that supports the bearing case holder 442 takes a form of being disposed on the cutter drive shaft 50 side of the cutter drive system device 5 with respect to the output shaft 42. On the other hand, there is no member that supports the bearing case holder 442 on the opposite side of the bracket stay 441.
In this embodiment, two members of the support bracket stay 441 and the bearing case holder 442 are combined, but they may be configured as an integral member.

Next, the cutter drive system device 5 driven by the output shaft 42 and the output pulley 43 will be described.
First, reference numeral 50 denotes a cutter driving shaft, which is a member that transmits power to the main shaft 32 disposed so as to extend in the width direction on the lower surface of the main body 10, and a speed change mechanism or the like is appropriately used. The power is transmitted to the main shaft 32 via the main shaft 32. Of course, there is a case where power is transmitted without using a transmission.
On the other hand, the rotation of the engine 4 is transmitted from the cutter drive belt 51 to the cutter drive shaft 50. The cutter drive belt 51 is connected to the tension pulley 52 and the output pulley 43 attached to the output shaft 42. It is wound endlessly so as to pass through a driven pulley 53 and a guide pulley 54 provided on the cutter drive shaft 50. In the claims, the “endless belt” is used for the cutter driving belt 51 because a method such as chain driving can be considered. The engine rotation drive is not necessarily limited to the belt drive.

Next, the cooling system device 6 for the engine 4 according to the present invention will be described. 1, 3, 6, 7, 8 and 9, the cooling system device 6 includes a radiator stand 60 as a supporting member, and a radiator body 61, a radiator fan 63, a fan pulley 64, and a fan bracket 65 as main members. Composed.
First, the radiator stand 60 supports the radiator main body 61 and the shroud 62, and projects a frame mounting bracket 602 for mounting on the chassis frame 100 of the main body body 10 with respect to the frame main body 601 while holding the radiator forward. A bracket 603 is provided.
In the radiator holding bracket 603, the lower member is a receiving plate member shape, which is indicated by reference numeral 603a, and the upper portion is seen in the radiator plane direction and has a flat plate shape with a bolt hole for attaching the radiator. The upper radiator holding bracket is indicated by reference numeral 603b.

Further, the frame main body 601 is provided with a shroud guide 604, and includes a lower shroud guide 604a and an upper shroud guide 604b. Each of the shroud guides 604 is a member having an angle cross section as an example, and has a long bolt hole 604c on a mounting surface to the frame main body 601, and an appropriate interval for sandwiching the shroud between the frame main body 601 is obtained. It is configured as follows. Reference numeral 604d denotes those fixing bolts.
A plunger bolt 604e is further screwed into a vertical portion of the shroud guide 604, and the bolt hole to be screwed is defined as an adjustment bolt hole 604f. The upper shroud guide 604b integrally supports a cleaner bracket 604g that supports an air cleaner of the engine 4.

  Further, the frame main body 601 is provided with a shroud face plate 605 on the shroud side, and as an example, the frame main body 601 includes an oval shroud opening 605a having a somewhat longer lateral width. Further, a flow guide blade 606 is disposed in front of the shroud face plate 605. The flow guide blade 606 is configured to have a spiral shape as a whole by combining a plurality of metal plate-like members bent in a substantially S shape. A base portion 606a, which is the central portion of the flow guide blade 606, is fixed in a converged state by a base support plate 606b, and a tip 606C of one of the flow guide blades 606 extends near the inner peripheral surface of the frame main body 601 and is shroud. It is fixed to the face plate 605 by welding. The flow guide blade 606 is formed so that the width dimension thereof is somewhat reduced at the tip end portion 606c. The flow guide blade 606 has a function of receiving cooling air from a radiator fan 63 described later and guiding the cooling air uniformly to the radiator body 61.

Next, the radiator body 61 will be described. The radiator main body 61 has a configuration in accordance with a conventional method. A radiator core 611 is provided at the center, an upper tank 612 is provided above the radiator core 611, and a lower tank 613 is provided below the upper tank 612. A radiator hose is connected to the engine 4 from the upper tank 612 and the lower tank 613, and cooling water is circulated according to a conventional method. Since it is a general structure, a detailed description is omitted.
When attaching to the radiator stand 60, a packing 614 is interposed in order to provide buffer support with the frame body 601 and to prevent leakage of cooling air.

  Next, the shroud 62 will be described. This has a flange portion 622 with respect to the funnel portion 621, and the funnel portion 621 has a circular shape in which the radiator fan 63 is almost densely packed. The upper and lower edges of the flange portion 622 are slide edges 622a, which are slidably fitted between the radiator stand 60 and the shroud guide 604, and the shroud 62 is located with respect to the radiator stand 60. It can be moved left and right. As a mechanism for this, the shroud 62 is provided with a shift receiving arm 622b on one side edge.

Next, the radiator fan 63 will be described.
The radiator fan 63 is a resin member that includes a fan blade 631 and a fan boss 632. As an example, the fan blade 631 takes the form of seven blades. A fan pulley 64 is fixed to the fan boss 632 to rotate the radiator fan 63. In this case, a pulley bearing 642 is fitted into the center of the fan boss 632, and a pulley shaft 643 is protruded rearward to fix the pulley to the fan bracket side. That is, the pulley shaft 643 has a female screw rod 643 a protruding rearward and a fixing nut 643 b fitted therein to be fixed to the fan bracket 65.

Next, the fan bracket 65 will be described.
The fan bracket 65 is a member that supports the female screw rod 643 a of the pulley shaft 643 of the fan pulley 64, and the fan bracket main body 651 is fixed to the chassis frame 100 of the main body 10. The fan bracket main body 651 includes a frame mounting portion 652 for mounting to the frame, and includes a fan support plate 653 so as to extend horizontally therefrom. The fan support plate 653 is provided with an elongated hole-like adjustment hole 653a, and provided with a tension bolt hole 653b on an end surface thereof, and an adjustment bolt 653c is fitted therein.

The movable fan bracket 654 is supported with respect to such a fan bracket main body 651. That is, the movable fan bracket 654 can be adjusted in the left-right direction while being supported by the fan support plate 654a, and the shaft receiving hole 654a is opened at the center thereof. Further, a guide projection 654b is provided on the side of the guide projection 654b. The guide projection 654b is fitted in the adjustment hole 653a to ensure the movement of the movable fan bracket 654 in the left-right direction. Further, an adjustment screw 654c is provided on the end face of the movable fan bracket 654, and this adjustment screw 654c performs an action of shifting the movable fan bracket 654 to the left and right by screwing the adjustment bolt 653c.
In other words, this mechanism slides the fan pulley 64 with the radiator fan 63 to the left and right to substantially adjust the tension of the fan belt 644.

In the present invention , since the shroud 62 has a dimension of the funnel portion 621 that is substantially dense with the outer diameter of the radiator fan 63, the shroud 62 is not affected by the movement of the radiator fan 63 due to the left / right tension adjustment. As long as it does not follow, there is a risk of interference contact between the fan blade 631 and the funnel portion 621. Therefore, in the present invention , a shroud shift rod 655 is formed so as to protrude from the movable fan bracket 654, and the tip end portion and the shift receiving arm 622b in the shroud 62 are connected via an appropriate spacer 655a.
With this configuration, as a result of adjusting the fan belt 644 by moving the fan pulley 64 to the left and right with the radiator fan 63, even if the position of the radiator fan 63 is shifted, the shroud 62 is also moved together. It is configured to be movable.
Incidentally, in order to avoid mutual interference contact, the fan blade and the shroud of the related art had a slightly oval shape in which the opening of the shroud was not circular but expanded sideways. As a result, the leakage of the cooling air generated by the radiator fan was inevitable.

The pavement material cutting apparatus 1 to which the present invention is applied has the above-described configuration. Hereinafter, a pavement material cutting mode using this will be described.
First, the outline of the cutting will be described. The engine 4 is started as appropriate, and the rotation is transmitted to the cutter blade 30 according to a conventional method. After such rotation start-up, the cutter blade 30 is allowed to act on the pavement surface P to appropriately form the cutting groove Ps.
≪Operation of drive mechanism≫

At this time, in the above embodiment of the pavement material cutting apparatus 1 to which the present invention is applied, the output shaft 42 of the engine 4 is supported by the bearing 45 in the support bracket 44 at the free end side. With this configuration, the output pulley 43 is provided inside the portion supported by the bearing 45, that is, between the bearing case holder 442 in the support bracket 44 and the flywheel 401. As a result, even if the crankshaft length increases and the position of the flywheel protrudes to the side of the conventional small engine, there is no conventional cantilever bearing or bearing holder, so the output pulley 43 is As a result, the output pulley can be disposed without increasing the lateral width as a whole.
The output shaft 42 is so supported as to be supported on the flywheel 401 side and supported on the free end side, so that the output shaft 42 is supported at both ends. Even if you receive it, you can support this in a balanced manner. In particular, in driving, the cutter driving belt 51 is loaded so as to be pulled toward the tension pulley 52 side of the cutter driving system device 5, but the bearing case holder 442 in the support bracket 44 has a base in that direction. The output can be effectively supported.
Further, in this layout, the support bracket 44 supports the free end of the output shaft 42 in a cantilever manner, and the number of members covering the output shaft 42 around the output shaft 42 is reduced. As a result, maintenance to peripheral devices, replacement work of the cutter drive belt 51 and the like can be easily performed.
The accessory system pulley groove 432 is wound with an accessory belt, and drives the HTS and the vacuum pump.
≪Cooling system operation≫

When the engine 4 is operated in this state, the cooling system 6 must naturally perform a stable operation of cooling water for cooling the engine 4.
In the present invention, the flow guide blade 606 is provided by using the radiator stand 60 as an example, and the cooling air generated by the radiator fan 63 due to the action of the radiator stand 60 is usually affected by the fan boss 632 in general. The cooling air is well guided to the central part. As a result, the cooling air is guided to the entire radiator core 611. In particular, the shroud 62 for guiding the cooling air surrounds the position near the outer periphery of the funnel portion 621, and since there is no unnecessary gap, the radiator fan 63 can effectively send the cooling air.
When the tension of the fan belt 644 is adjusted by moving the fan pulley 64 with the radiator fan 63, the position of the radiator fan 63 is shifted, but the following operation is performed correspondingly. That is, the movable fan bracket 654 of the fan bracket 65 moves, and accordingly, the shroud shift rod 655 connected to the movable bracket bracket 654 operates to move the shroud 62. As a result, the shroud 62 also moves in response to the movement of the radiator fan 63. As a result, it is not necessary to make the opening form of the shroud 62 into an oval shape that allows lateral movement, and cooling effectively. Wind can be blown into the radiator body 61.

P Pavement surface Ps Cutting groove 1 Pavement material cutting device 2 Wheel device 3 Cutter device 4 Engine 5 Cutter drive system device 6 Cooling system device

DESCRIPTION OF SYMBOLS 1 Pavement material cutting device 10 Main body body 100 Chassis frame 110 Chassis 11 Cover panel 12 Gauge rod 121 Gauge piece 122 Roller 13 Progression operation handle 14 Lifting operation handle

2 Wheel device 21 Main wheel 22 Secondary wheel 23 Secondary wheel arm 231 Arm pivot

3 Cutter device 30 Cutter blade 31 Bearing 32 Spindle

4 Engine 40 Engine body 401 Flywheel 402 Engine block

41 Engine base 410 Mount bracket 411 Rubber bush

42 Output shaft 421 Flange 422 Pulley shaft

43 Output pulley 431 Blade pulley groove 432 Auxiliary system pulley groove

44 Support bracket 441 Bracket stay 441a Female thread 442 Bearing case holder 442a Bearing space 442b Bolt hole 442c O-ring groove 444 Tightening bolt

45 Bearing 451 Bearing case 453 O-ring 454 Spacer 455 Shaft locking bolt 456 Bearing case stopper

5 Cutter drive system device 50 Cutter drive shaft 51 Cutter drive belt 52 Tension pulley 53 Driven pulley 54 Guide pulley

6 Cooling System 60 Radiator Stand 601 Frame Main Body 602 Bracket 603 Radiator Holding Bracket 604 Shroud Guide 604a Lower Shroud Guide 604b Upper Shroud Guide 604c Long Bolt Hole 604d Fixing Bolt 604e Plunger Bolt 604f Adjust Bolt Hole 605 Shroud Surface Plate 60 Blade 606a Base 606b Base support plate 606c Tip

61 Radiator body 611 Radiator core 612 Upper tank 613 Lower tank 614 Packing

62 shroud 621 funnel part 622 flange part 622a slide edge 622b arm

63 Radiator fan 631 Fan blade 632 Fan boss

64 Fan pulley 642 Pulley bearing 643 Pulley shaft 643a Female thread rod 643b Fixing nut 644 Fan belt

65 Fan bracket 651 Fan bracket body 652 Frame mounting portion 653 Fan support plate 653a Adjustment hole 653b Tension bolt hole 653c Adjustment bolt 654 Movable fan bracket 654a Shaft receiving hole 654b Guide protrusion 654c Adjustment screw 655 Shroud shift rod 655a Spacer

Claims (6)

A radiator body through which engine coolant is guided, a radiator fan that blows cooling air to the radiator body, a shroud that surrounds the radiator fan to prevent escape of the cooling air, and a fan pulley that transmits rotation to the radiator fan,
With a fan bracket to support this fan pulley,
In the apparatus for cooling the engine by cooling the cooling liquid in the radiator body with cooling air from the radiator fan,
A plurality of flow guide blades that converge from the periphery toward the center are provided between the radiator body and the radiator fan, and the cooling air generated by the radiator fan is guided by the flow guide blades over the entire area of the radiator body. On the other hand, the shroud has a funnel portion surrounding the radiator fan having a slightly larger shape so as not to interfere with the peripheral edge of the radiator fan, and a fan pulley for transmitting rotation to the radiator fan is used for transmitting rotation. An engine cooling device characterized in that the installation position of the fan belt can be freely changed to adjust the tension of the fan belt, and the shroud surrounding the radiator fan also moves in accordance with the change of the installation position of the fan pulley .
The configuration for changing the installation position of the fan pulley that transmits the rotation to the radiator fan consists of a fan bracket body in which a fan bracket that supports the fan pulley is fixed to an appropriate peripheral member, and a movable fan bracket that directly supports the fan pulley. On the other hand, the configuration in which the shroud moves is configured such that the shroud is slidably supported by the shroud guide with respect to the radiator stand that is a support member of the shroud. and the claim 1 engine cooling apparatus, wherein the also moves the shroud in response to movement of the radiator fan by being connected to the movable fan bracket.
The engine cooling apparatus according to claim 1 or 2 , wherein each of the flow guide blades is curved in an S shape when viewed from the front, and is configured in a deformed spiral shape as a whole.
The engine cooling device according to claim 1 , wherein the flow guide blade has a width dimension near a peripheral portion narrower than other portions.
The diversion blades, according to claim 1, characterized in that provided on the radiator stand is a member for supporting the radiator body and the shroud, the engine cooling system of 3 or 4.
The engine cooling device according to any one of claims 1 to 5 , wherein the device is applied to a pavement material cutting device.

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