JPH0320493Y2 - - Google Patents

Description

[Detailed description of the invention] This invention provides the following features to ensure engine cooling performance when operating the engine in a dusty atmosphere.
Regarding devices that remove dust from cooling air and suck it in,
The purpose is to improve the dustproof performance, reduce the rate of dust adhesion to the dustproof screen, and to make it compact.

As a conventional device of this type,
There is one disclosed in Publication No. 12640. In other words, a main air intake chamber is provided in front of the engine radiator, a sub air intake chamber is provided above the main air intake chamber, and a dustproof net is installed at each air intake port on the front of each of the main and sub air intake chambers. By installing a perforated ventilation resistance plate between the main air intake port and the radiator, air is sucked from the main air intake port near the radiator fan on the back of the radiator via the ventilation resistance plate, and at the same time, air is sucked from the main air intake port near the radiator fan on the back of the radiator, and at the same time Negative pressure is also generated in the auxiliary air intake chamber so that air can also be taken in from the auxiliary air intake.

However, this structure has the following drawbacks.

(b) Since the opening ratio of the small ventilation holes is uniform over the entire surface of the ventilation resistance plate, the air intake speed in the central part of the ventilation resistance plate near the radiator fan is faster, and the amount of air intake in the peripheral part further away from this increases. It becomes less. Further, in the sub-air intake port, the air intake speed is increased at the lower portion near the radiator fan, and the amount of air sucked at the upper portion far away is almost eliminated.

As a result, the amount of air taken in is uneven, the total amount of air taken in is small, and the cooling performance of the engine is degraded.In addition, a large amount of floating dust is sucked in at the portion where the air intake speed is high, resulting in poor dustproof performance.

(b) In areas where a large amount of floating dust is sucked in, dust quickly adheres to and accumulates on the dustproof screen, and the screen begins to become clogged.As a result, the air suction area of the dustproof screen becomes narrower, and the air suction speed increases. Since the clogging spreads rapidly, the dust that quickly adheres to and accumulates on the dustproof screen must be removed frequently.

Since the auxiliary air intake chamber protrudes significantly upward above the air intake chamber on the front side of the radiator, the entire device becomes extremely large.

In order to eliminate the above-mentioned drawbacks, the present invention attempts to equalize the intake speed of outside air over the entire surface of the dustproof screen.As a means for this purpose, the engine is covered with a bonnet and the engine is cooled. A wind suction opening is provided in one side wall of the bonnet, a suction chamber is formed on the outside of this side wall, a suction chamber is also formed on the outside of at least one side wall adjacent to this side wall, and both The ventilation chambers are connected through their corner butts, each dustproof screen is installed at the outside air intake on the outside of each ventilation chamber, and each windshield plate is installed between each dustproof screen and each side wall in each ventilation chamber. and connect both wind shield plates at their abutting parts, and within the end of the adjacent side air intake chamber far from the air intake port, between the inner end surface and the edge of the opposite wind shield plate. Ventilation gaps are left in the air, and small ventilation holes are made to adjust the air intake speed, which are distributed over almost the entire surface of each wind shield plate. In order to It is characterized in that the opening ratio of the ventilation holes in the central part of the wind shield plate is set to a smaller value than the opening ratio of the ventilation holes in the peripheral parts.

Hereinafter, embodiments of the present invention will be described based on the drawings.

FIG. 1 shows a combine harvester 1, in which an operator in a control seat 3 of a control section 2 operates a control device 4 to raise grain rods to be planted in a field with a lifting device 5, and a reaping device 6 The paddy is harvested, transported to the rear by a conveying device 7, threshed by a threshing device 8, the resulting waste straw is shredded by a cutting device 9 and released into the field, and the threshed paddy is packed into paddy by a bagging device 10. Pack into bag 11.

A pulling device 5, a reaping device 6, a conveying device 7, and a threshing device 8 are arranged in order from the front on the right side of the fuselage of the combine 1. On the left side of the aircraft, from the front, the control device 4 of the control section 2, the control seat 3, and the bagging device 10 are installed.
is placed. A cutting device 9 is arranged at the rear on the fuselage.

An engine 12 and a bonnet 13 are arranged below the pilot seat 3, and the engine 12 is attached to the bonnet 1.
3, and a pilot seat 3 is fixed on the upper wall of the bonnet 13.

2 through 6 show the mounting system for the engine 12 and bonnet 13. FIG.

The engine 12 and bonnet 13 are connected to the intermediate frame 14
This intermediate frame 14 is attached to the combine harvester 1.
It is positioned and placed on the machine frame 15 by the positioning means 16 and fixed by the fixing means 17.

The intermediate frame 14 has a portal frame 1 on the right edge of the bottom frame 18.
It consists of 9 upright installations. The bottom frame 18 consists of a U-shaped edge frame 20, one radiator support frame 21 and two engine support frames 22 attached to the front and rear sides of the edge frame 20. The radiator support frame 21 is located on the left side, and the engine support frame 22 is located on the right side.

A radiator 23 is supported on a radiator support frame 21 in a vibration-proof manner with vibration-proof rubber 24 . The engine 12 straddles the two engine support frames 22, and vibration isolating rubbers 25, 26 are located at four locations on the front, rear, left and right sides of the lower part of the engine 12.
Anti-vibration support. The right end of the engine 12 enters the portal-shaped interior space of the portal frame 19, and the output shaft 27 that projects outside the right end wall of the engine 12 projects outside the portal-shaped interior space of the portal frame 19. The power of the engine 12 is transmitted from the output shaft 27 to the combine 1
is transmitted to each part of the unit via a V-belt transmission device 28.

The bonnet 13 is formed into a box shape with an open bottom and right side, and the lower edge of the left side of the bonnet 13 is attached to the left side edge of the bottom frame 18 with a hinge 29 so that it can swing open and close. When the bonnet 13 is closed, the right edge of the bonnet 13 touches the portal frame 1.
It is received on the left side surface of 9 and fixed by hand screw type fixing means 30.

The bottom frame 18 of the intermediate frame 14 is the machine frame 1 of the combine harvester 1.
5, is positioned by positioning means 16, and fixed by fixing means 17. In the positioning means 16, after the positioning hole 32 is positioned and fitted into the fixed positioning pin 31, when the intermediate frame 14 is shifted left and right using this as a fulcrum, the spring 3
The structure is such that a movable pin 34 that can be advanced freely at 3 is fitted into and engaged with an elongated hole 35. The fixing means 17 is the bottom frame 2
Each mounting leg 36 protruding outside the four corners of the machine frame 15 is fixed to the machine frame 15 with bolts 37.

A device for dust-proofing and sucking the cooling air of the engine 12 is provided on the left side, front and rear surfaces of the bonnet 13, and this device prevents dust floating around the combine harvester from adhering to the dust-proof net 38 during operation. The following measures have been taken to prevent clogging.

A cooling air intake port 39 for the engine 12 is opened in the center of the left side wall 40 of the bonnet 13.
An air suction chamber 41 is formed on the outer surface of the left side wall 40, and thigh air suction chambers 44 are formed on the outer surfaces of the front side wall 42 and the rear side wall 43, which are adjacent to each other on both sides of the left side wall 40. These suction chambers 41 and 44 communicate with each other at their angular abutting portions.

Outside air intake port 45 on the outside side of each air intake chamber 41, 44
Each dustproof net 38 is provided in each of the air suction chambers 41, 44.
Each windshield plate 4 is installed between each dustproof screen 38 and each left, front, and rear side wall 40, 42, and 43 of the bonnet 13.
6,47 are provided. 3 windshield plates 46,
47 is connected in a wind-shielding manner at the abutting portion.

In the right end portions of the front and rear air suction chambers 44, a large ventilation gap 49 is provided between the right end inner surface 48 and the right end edge of the wind shielding plate 47 facing thereto. A small ventilation gap 51 is also formed between the upper and lower end surfaces 50 of each of the air suction chambers 41, 44 and the upper and lower edges of each of the wind shielding plates 46, 47. Ventilation holes 52, 53 for adjusting the air suction speed are formed distributed over almost the entire surface of each of the wind shielding plates 46, 47.

In order to make the inflow speed of outside air at each dustproof net 38 almost uniform, the opening ratio of the small ventilation hole 52 of the left wind shield plate 46 located outside the air intake port 39 is set to the front and rear shields adjacent to it. The aperture ratio of the ventilation holes 53 of the wind plate 47 is set to be smaller than that of the ventilation holes 53 of the left side windshield plate 46. It is set to a value smaller than the aperture ratio.

When the bonnet 13 is closed, the fuel tank 54 of the engine 12 is placed in the space above the dustproof screen 38 on the rear side as a fixed part that constitutes a part of the combine 1, and the fuel tank 54 of the engine 12 is placed in the space above the dustproof screen 38 on the rear side. It is fixedly supported at the rear part on the upper wall of the portal frame 19.

When the bonnet 13 is opened and swung, the upper edge of the rear outside air intake port 45 is connected to the fuel tank 54.
The opening angle of the bonnet 13 is set by the stopper device 56 so that the bonnet 13 is completely removed laterally to the left and faces an open space. The stopper device 56 consists of a swing arm 57 pivotally supported by the intermediate frame 14, and a sliding cylinder 58 fixed to the inner surface of the front wall 42 of the bonnet 13 in a state that the swing arm 57 is slidably fitted onto the swing arm 57. Locking claw 5 at the tip of the swinging arm 57
9 receives the sliding tube 58, thereby holding the bonnet 13 in an open and swung position.

A pair of left and right mesh fitting grooves 60 is formed on the left and right side edges of each outside air intake port 45, and the upper end of each pair of screen fitting grooves 60 is connected to a dustproof screen at both left and right sides of the upper end edge of the outside air intake port 45. It opens upward as an insertion port 61 of 38. Each dustproof screen 38 is inserted through each insertion port 61 and fitted into each pair of screen insertion grooves 60, thereby being freely inserted and fixed into the outside air intake port 45.

The upper edge 62 of each dustproof screen 38 is bent horizontally toward the bonnet 13 side, and the horizontal upper edge 62
A sponge-like sealing material 63 is pasted on the lower surface of the bonnet 13, and this sealing material 63 contacts the upper surface of the bonnet 13 in a sealed manner. At the same time, the lower edge of the dustproof net 38 comes into airtight contact with the upper surface of the sponge-like sealing material 64 attached to the lower surface of the outside air intake port 45, compressing the sealing material 64 to the middle of its thickness. ing.

In the figure, numeral 65 is a heat shield plate, and the engine 12
This prevents the upper wall of the bonnet 13 from being heated by the radiant heat radiated from the exhaust manifold 66 and muffler 67, and also prevents the radiator from being heated through the radiator 23. fan 6
A part of the cooling air blown from 8 to the engine 12 is guided to the exhaust manifold 66 and the muffler 67 to powerfully cool them, thereby improving exhaust performance.

69 is a tension clutch pulley, which transmits power from the output shaft 27 of the engine 13 to various parts.
The belt transmission device 28 is switched between a transmission state and a transmission cutoff state, and a support arm 70 of this pulley 69 is rotatably supported by a boss 71 fixed to the upper part of the portal frame 19.

A safety cover 72 protects the left side of the operator, and is fixed to the upper part of the gate frame 19 with bolts.

Reference numeral 73 denotes an electric wire, which is routed from the machine frame 15 through the lower end of the front leg of the portal frame 19, along the inner surface facing the portal space of the portal frame 19, and is connected to the clamp 74.
It is clamped at the gantry frame 19, guided to the rear leg of the portal frame 19, and wired from there to the engine 12.

Anti-vibration rubber 25, 2 that provides anti-vibration support for the engine 12
6, a pair of front and rear anti-vibration rubber 2 located on the right side
6 is mounted in an inclined position with its support axis facing diagonally upward toward the engine, thereby preventing the engine 12 from vibrating in the longitudinal direction.
By mounting the support axis in a vertical position, resonance during idling rotation of the engine 12 is prevented, and while collision between the radiator fan 68 and the fan shroud 75 is prevented, the gap between the two can be set small. The cooling capacity is increased by increasing the amount of cooling air.

A sealing material 76 is pasted along the periphery of the air intake surface of the radiator 23, and is attached to the bonnet 13.
The left side wall 40 of the left side wall 40 is in sealing contact. In order to prevent the upper part of the radiator 23 from being pushed to the right side by this contact, the upper rear part of the radiator 23 is supported via a buffer arm device 77. Buffer arm device 7
7 is formed by connecting a fixed arm 78, a turnbuckle 79, and a vibration isolating rubber 80 in a straight line, the fixed arm 78 is fixed to the portal frame 19, and the vibration isolating rubber 80 is fixed to the radiator 23. The upper front part of the radiator 23 is supported by a hot water pipe 81 made of a large diameter rubber hose so as not to tilt to the right.

82 is an accelerator lever for the engine 12;
It is pulled to the left by a return spring 83, and adjusted to the right by a release wire 84 for remote control. The left end of the return spring 83 is anchored to the rear surface of the radiator 23.

The lower surface of the fuel tank 54 is formed into an inclined surface upward to the left, and the lower surface 85 of the fuel tank 54 and the bonnet 1
A triangular space 86 that expands to the left is formed between the upper surface of 3 and the upper surface of 3. On the rear side of the triangular space 86, a pair of front and rear bag receiving rods 87 constituting the bagging device 10 are located. A hole 88 is inserted and set from the left free end to the right proximal end.

When inserting and removing the hanging hole 88 of the paddy bag 11 into and out of the bag holder 87, the operator's hand can be inserted into the triangular space 86, so the operator can bring the bag holder 87 as close as possible to the bonnet 13 and remove the bag. The front and rear dimensions of the stuffing device 10 are significantly shortened, thereby shortening the overall length of the combine harvester 1.

Moreover, since the position of the bag receiving rod 87 is very close to the operator's seat 3, the operator can easily and quickly take out the paddy bag 11 that has been filled with paddy while sitting in the operator's seat 3, or by simply getting off and turning around a little. , a new spare paddy bag 11 can be efficiently set in a packed state.

Further, due to the presence of the triangular space 86, the bonnet 13 can be opened and closed smoothly without colliding with the fuel tank 54.

Reference numeral 89 denotes a direction indicator light, which is fixedly supported on the left side surface of a stay 90 fixed on the rear part of the upper wall of the bonnet 13. The electric wire 91 of this direction indicator light 89 is connected to the machine frame 1.
5, passes through the lower part of the left side wall 40 of the bonnet 13 to the left, goes up the left side of the left side wall 40, passes through the upper part of the left side wall 40 to the right, passes through the upper wall of the bonnet 13, and connects to the direction indicator light 89.
connected to.

Reference numeral 93 designates a protective frame for the dustproof net 38, which is removably fixed to the outer surface of the bonnet 13 with bolts 94.

Note that it is also possible to modify a part of the above embodiment as follows.

A As shown in FIG. 7, the air intake chambers 41 and 44, the dustproof screen 38, and the wind shield plates 46 and 47 are formed in one independent case 95, and this case 95 is attached to the bonnet 13 by welding, rivets, bolts, etc. Secure with the following fixing means.

B: Either the front air intake chamber 44 or the rear air intake chamber 44 is omitted.

C. The electric wire 73 is run inside the rectangular cylindrical inner space of the portal frame 19.

Since the present invention is configured as described above, it has the following effects.

(a) In order to make the inflow speed of outside air through the dustproof net almost uniform over the entire surface of each wind shield, the opening ratio of the small ventilation holes in the wind shield located outside the air intake port should be adjusted to that of the adjacent wind shield. Set the opening ratio of the ventilation holes to a smaller value than the opening ratio of the ventilation holes, and also set the opening ratio of the ventilation holes in the central part of the wind shield located outside the air intake port to a value smaller than the opening ratio of the ventilation holes in the peripheral parts. By setting it to a small value, the air intake speed will be uniform in all parts of all dustproof screens, so the total air intake volume can be increased.
In addition to improving the cooling performance of the engine, the air intake speed can be uniformly slowed down to almost eliminate the suction of floating dust, greatly improving dustproof performance.

(b) Since the air suction speed is uniformly slowed down in all parts of the dustproof screen to almost eliminate the suction of floating dust, there is no possibility of dust adhering to and accumulating on the dustproof screen. As a result, it is possible to omit the complicated work that conventionally required frequent removal of dust that rapidly adheres to and accumulates on the dustproof screen.

C. Since the air intake chamber adjacent to the air intake chamber facing the air intake port is bent at right angles and formed in the bonnet, the adjacent air intake chamber does not protrude outward from the bonnet, and the equipment The whole thing can be compacted.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a perspective view of a combine harvester, FIG. 2 is a longitudinal sectional front view of the portion shown in FIG.
Fig. 3 is a sectional view taken along the line shown in Fig. 2, Fig. 4 is a perspective view of the intermediate frame, Fig. 5 is a vertical sectional side view of Fig. 2, and Fig. 6
The figure is a view taken along the arrow in FIG. 3, and FIG. 7 is a perspective view of a bonnet according to another embodiment. 12...Engine, 13...Bonnet, 38
... Dustproof net, 39 ... Air intake, 40, 42, 43
. . . Side wall, 41, 44 .

Claims (1)

[Scope of utility model registration request] The engine 12 is covered with a bonnet 13, an intake port 39 for the cooling air of the engine 12 is opened in one side wall 40 constituting the bonnet 13, an intake chamber 41 is formed on the outer surface side of this side wall 40, and at least A suction chamber 44 is also formed on the outer surface of one of the adjacent side walls 42, 43, and the two suction chambers 41, 44 are communicated with each other through their angular abutting portions, so that the outside air on the outside surface of each of the suction chambers 42, 43 is communicated. Each dustproof net 38 is provided at the intake port 45,
Each dustproof net 38 and each side wall 4 in each ventilation chamber 41, 44
0, 42, and 43, and connect the two wind shield plates 46, 47 at their abutting portions, and A ventilation gap 49 is provided in the end portion between the inner end surface 48 and the edge of the wind shield plate 47 opposite thereto. The wind shielding plate 46 is positioned outside the air intake port 39 so that the small ventilation holes 52 and 53 are opened and the inflow speed of outside air at the dustproof net 38 is almost uniform over the entire surface of each wind shielding plate 46 and 47. The opening ratio of the ventilation holes 52 is set to a smaller value than the opening ratio of the ventilation holes 53 of the adjacent wind shielding plate 47, and the ventilation of the central part of the wind shielding plate 46 located outside the air intake port 39 is A cooling wind dustproof air suction device for an engine, characterized in that the aperture ratio of the small hole 52 is set to a smaller value than the aperture ratio of the small ventilation hole 52 near the periphery thereof.