JP3533673B2 - Tractor muffler cooling configuration - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tractor muffler.
Related to cooling configuration . It can be used as a riding tractor for management work. 2. Description of the Related Art An engine muffler of a tractor is configured to protrude above an engine hood on a vehicle body to exhaust air, or to exhaust air to a lower soil surface or a side. Depending on the form, the noise is loud and crops may be damaged by high heat exhaust. The present invention solves such a defect and provides an engine muffler and a muffler cover that covers the engine muffler below the front portion of the vehicle body, and further includes a cooling air for cooling the muffler.
It also reduces damage to crops caused by crops . According to the present invention, an engine (E) is supported by a pair of left and right engine frames (16, 16) arranged at a front portion of a vehicle body.
6, 16) are connected to each other to form a bumper (5), and a horizontal frame (17) is provided between the engine frames (16, 16) at a predetermined interval behind the bumper (5). A muffler (2) connected to an exhaust pipe (15) of the engine (E) is provided below and in front of the engine (E), and the upper and lower sides of the muffler (2) are covered with muffler covers (21, 3). In a tractor forming an exhaust path (4) through which the cooling air of the muffler (2) passes, exhaust gas in the muffler (2) is passed through a tail pipe (23) provided in the muffler (2) to the bumper (5). ), And the front end of the exhaust path (4) is connected to an exhaust port (6) formed by the bumper (5), the horizontal frame (17) and the engine frames (16, 16). And before The muffler cooling structure of the tractor, characterized in that the upwardly configured to exhaust air to the cooling air of the muffler (2). [0004] When the engine is driven, cooling is performed.
The wind is guided to an exhaust path in the muffler cover, absorbs heat released from the muffler while passing through the exhaust path, and is exhausted from an exhaust port at the front of the vehicle body. Therefore, the heat radiation effect of the muffler can be enhanced . The exhaust of the muffler is van
And the cooling air is exhausted above the bumper.
And the exhaust vent formed by the horizontal frame and the engine frame
Crops are damaged by heat
There is no . [0005] A tractor body 1 includes a steering handle 7
The vehicle has a front wheel 8 and a rear wheel 9 that can be steered by the vehicle, and is driven by an engine E mounted on a front part of the vehicle to be driven by four wheels. Reference numeral 10 denotes a cockpit, and reference numeral 11 denotes a connecting device for connecting a working machine to a rear portion. Reference numeral 12 denotes an oil pan, 13 denotes a clutch housing, and 14 denotes a steering post. At the front of the vehicle body 1, an engine frame 16 on which an engine E is mounted is provided on both the left and right sides in parallel along the front-rear direction. The bumper 5 is provided at an appropriate interval in front of the portion 17. The engine E is mounted on the engine frame 16, has a radiator 18 and a radiator fan 19 at a front portion, and has an upper side covered with a bonnet 20. A muffler 2 connected to an exhaust pipe 15 of the engine E is provided at the bottom, and a gap between the muffler 2 and the radiator 18 at the front of the engine is covered and blocked by an upper muffler cover 21, and a lower portion of the muffler 2 is covered by a lower muffler cover 3. I do. Also, these upper and lower muffler covers 2
This is a form surrounded by the engine frame 16 and the horizontal frame portion 17 of the first and third engines. The bonnet 20 and the upper muffler cover 2
1 and the like, the rear lower end of the engine room is communicated with the upper rear part of the lower muffler cover 3 through an air outlet 22, and a part of the cooling air that has cooled the engine E is blown through the air outlet 22. To guide the air into the muffler cover 3. An exhaust passage 4 is formed at an appropriate interval between the muffler 2 and the lower muffler cover 3. The front end of the exhaust passage 4 is communicated with the exhaust passage 6 between the horizontal frame portion 17 and the bumper 5, and The cooling air sent into the exhaust passage 4 from the opening 22 can be discharged upward from the exhaust opening 6 to the front. Reference numeral 23 denotes a tail pipe for discharging and guiding exhaust gas from the muffler 2 and has an exhaust port 24 above one side of the bumper 5. The bottom of the muffler cover 3 is covered with a heat insulating plate 26 with a heat insulating material 25 interposed therebetween. Such a heat insulating material, a heat insulating plate, and the like may also cover the left and right sides of the muffler cover 3. Reference numeral 27 denotes a bracket for mounting the muffler cover 3, which is configured to be detachable from the horizontal frame portion 17. 28 is a muffler cover 3 and a heat insulating plate 2
6, and a mounting bolt for the bracket 27 is inserted therethrough. When covering with the heat insulating plate 26 as described above, even when the tractor for raised floors runs over the crop A, even if the crop is in direct contact with the lower surface of the heat insulating plate 26, thermal damage is caused. I do not receive. 5 and 6 is different from the above example in that narrow guides 29 for preventing the sliding of the crop A are attached to both left and right sides of the muffler cover 3. FIG. 7 is different from the above example in that a vertical air-cooled engine with the crankshaft 66 of the engine E directed vertically is used. An intake port 68 is provided at an upper portion of the engine cover 67, and the wind sucked from the intake port 68 by the rotation of the fan 69 is supplied to the engine frame 1.
The air is blown into the exhaust path 4 through the air outlet 22 between the floor board 77 on the upper surface 6 and the upper muffler cover 21. Insulation material 2
Reference numeral 5 has air permeability, and slits 78 and 79 are formed in the muffler cover 3 and the heat insulating plate 26 so that the wind pressure of the exhaust passage 4 can escape directly to the outside from the slits 78 and 79. 80 is an output pulley of the engine. In FIG. 8 to FIG.
(For example, a seedling plant 30)
In the operation wire 31 (inner wire), the operation wire can be divided or connected to the vehicle body 1 side and the seedling planter 30 side from an intermediate position. The seedling transplanter 30 has a seedling transplanter body 34 having a separate planting device or the like on the soil surface by a seedling planting device 33 while feeding the seedlings supplied to the seedling mounting table 32.
6, a float 38 is provided at the rear of the vehicle body 1 so as to be capable of ascending and descending control, and a float 38 whose front end can freely swing up and down around a rear float shaft 37 is provided below the seedling plant 34. A link 54 formed by pivoting a spool 52 of a lift control valve 39 of a hydraulic circuit provided on a seedling plant body 34 between a bracket 45 integral with the float 38 and the spool 40.
, The raising and lowering control valve 39 is switched by the upward movement of the float 38 to raise the seedling transplanting body 34 by the lift cylinder 36, and the lowering of the float 38 lowers the seedling transplanting body 34, and Is controlled so that the height of the seedlings with respect to the soil surface is kept constant and the seedling planting depth is kept constant. The float 38 is constantly tensioned downward by a spring 51. An operation lever 41 is provided on the vehicle body 1 side.
By moving the float 38 upward through the wire 31,
The raising and lowering control valve 39 is operated by the spool 40 to maintain the seedling plant 34 at an appropriate raised position. Further, the operation of the operation lever 41 causes the cam lever 42 to operate, and the pressure is applied to the spring 44 for adjusting the sensitivity via the inner wire 49 so as to be interlocked. The spring 44 extends between a bracket 45 fixed to the float 38 and a hinge 47 of an expansion / contraction link 46 for connecting the float 38 and the seedling plant 34 in an expandable / contractible manner.
7 is connected to one end of the spring 44 by passing the inner wire 49 passing through the outer wire 48 to be received by the outer wire 48, and the tension of the spring 44 is increased by pulling the inner wire 49 by the operation of the cam lever 42. This makes it difficult for the float 38 to move up and down, that is, makes the sensitivity of the float 38 insensitive. Conversely, inner wire 4
When the screw 9 is loosened, the tension of the spring 44 is reduced and the sensitivity of the float 38 is increased. The guide panel 50 of the operating lever 41 is provided with a locking portion for locking the operating position, and the operating position allows the vertical position of the float 38 to be operated to select the elevation control valve 39 and the sensitivity. However, the inner wire 31 connected between the operation lever 41 and the bracket 45 of the float 38 locks the distal end of the outer wire 43 to the distal end of the link 54 and pulls the inner wire 31. As a result, the space between the float 38 and the link 54 is attracted and lifted against the spring 51. A coupler 55 is provided in the middle of the inner wire 31 and the outer wire 43 to provide a tractor body 1
The inner wire 31 and the outer wire 43 can be connected and separated by the coupler 55 when the seedling planter is attached to or detached from the plant. Assuming that the vehicle body 1 side is A and the seedling transplanter side is B, the connectors 56A, 56B at the tips of the inner wires 31A, 31B.
The connector 56 that fits and connects between the connector 5 and the connector 5
6B, a groove 57 is formed on the side surface of the socket portion so that the connector 56A can be freely moved in and out.
A slit 58 is formed so that the portion can freely move in and out and locks the connector 56A. As a result, the connectors 56A and 56B are disengaged when they are moved to the side, but are not disengaged when pushed or pulled in the wire direction. The cylindrical connecting case 59 for accommodating the connector 56 has a long hole 70 through which the connector 56A can enter and exit, and a lock plate 71 on the other side. A long hole 72 to be inserted is formed. The lock plate 71 is a bracket 7 integrated with the connection case 59.
The connector 56B is pushed in by a bolt 74 screwed into the connector case 3, and can be fixed by pressing the movable connector 56B located in the connection case 69. 75 is the outer wire 43A
And screw it to the tip of the connection case 59,
It is an outer support that can adjust the tension of the inner wire 31. Reference numeral 76 denotes an outer receiver which receives the outer wire 43B and receives the distal end of the connection case 59 in opposition to the outer wire 43B. With the operation lever 41 holding the float 38 at the adjustment operation position, the inner wire 3
When the outer wire 43 is separated from the inner wire 3, the outer holder 75 is screwed into the connection case 69 to separate the inner wire 3.
The connection case 59 is rotated so that the groove 57 of the connector 56B is aligned with the elongated hole 70, the bolt 74 is tightened, and the connector 56B is pressed and fixed by the lock plate 71. Connect the outer wire 43A to the outer
And the inner wire 31A is moved in the lateral direction, and the connector 56A at the tip is connected to the groove 5 of the connector 56B.
7 and the slot 70. At this time, the inner wire 31
The connector 56A of A can move from the long hole 70 to the outer receiver 75 side through the inside of the connection case 69. By removing the outer holder 75 from the connection case 69, the inner wire 31A, the outer holder 75, and the like can be separated from the connection case 69 that fixes and holds the inner wire 31B with the lock plate 71. Therefore, the relationship between the inner wire 31B and the float 38 to the elevation control valve 39 is the same as before the separation. The inner wires 31A, 31B and the outer wires 43A, 4
In order to connect the 3Bs to each other, the procedure may be reversed. It is needless to say that such a structure in which the operation wires can be freely connected and separated can be used for other wires 48 and 49 as needed. Further, in the case of a seedling planting machine, various operations such as a wire for performing an operation for inserting and exiting a marker for alignment, a clutch wire, and an interlocking wire can be used as a wire for connecting with the vehicle body 1 side. FIG.
In FIG. 18 to FIG. 18, in order to make the seedling plant 30 inclined forward and downward so that it can be easily connected to the rear end of the link mechanism 35 at the rear of the vehicle body 1, the rear end of the seedling plant 34 is provided with an auxiliary Wheel 6
0 is provided. Auxiliary wheels 61 are also provided at the front, and the auxiliary wheels 60, 61 are grounded to move the heavy multi-row seedling planting machine 30 at the front end of the seedling plant 34. Link mechanism 3
5 Can be connected by engaging the hitch at the rear end. When the hitch hood 62 is engaged and the link mechanism 35 is lifted up by the extension of the lift cylinder 36, the seedling transplanter 30 floats, and the rear auxiliary wheel 60 can be turned upward and stored. . The rear auxiliary wheel 60 is
At the center of the rear end of the seedling plant 34, a crank arm 63 is used to freely rotate forward and backward by a fixed angle, and when moved rearward, the auxiliary wheel 60 is located below and is grounded below the rear of the float 38. Is supported in a state in which is floated, and when it is turned to the front side, it is stored at a position above the float 38 so as not to hinder seedling planting by the seedling planting device 33. The crank arm 63 has a petal 64, and a rear end of the seedling plant 34 has a handle 65. In a state where the float 38 of the seedling plant 30 is grounded or can be grounded, the handle 65 The auxiliary wheel 60 can be easily taken in and out by operating the petal 64 with the foot while lifting the hand by hand.

[Brief description of the drawings] FIG. 1 is a partial side view of a tractor. FIG. 2 is a perspective view of a part thereof. FIG. 3 is a perspective view of a part thereof. FIG. 4 is an overall side view. FIG. 5 is a perspective view showing another embodiment. FIG. 6 is a front sectional view thereof. FIG. 7 is a side view showing another embodiment. FIG. 8 is a side view of the float portion. FIG. 9 is a side view of the vehicle-side operation lever. FIG. 10 is a side view of a wire connecting portion. FIG. 11 is a back sectional view thereof. FIG. 12 is a back sectional view thereof. FIG. 13 is a side view of the seedling transplanter. FIG. 14 is a side view of the seedling planter. FIG. 15 is a perspective view showing a part of the operation. FIG. 16 is a perspective view showing a part of the operation. FIG. 17 is a plan view of a seedling planter. FIG. 18 is a rear view thereof. [Explanation of symbols] 1 Body 2 Muffler 3 Muffler cover 4 Exhaust path 5 bumper 6 Exhaust port E engine

Continuation of the front page (72) Inventor Minoru Matsuoka 1st department of Yakura, Tobe-cho, Iyo-gun, Ehime Pref. Iseki Agricultural Machinery Co., Ltd. Engineering Department (56) JP, A) JP-A-6-316224 (JP, A) JP-A-3-104482 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) B60K 13/04 B60K 11/04 B62D 25/08

Claims (1)

(57) Claims 1. An engine (E) is supported by a pair of left and right engine frames (16, 16) arranged at a front portion of a vehicle body, and front ends of the engine frames (16, 16). A bumper (5) is formed by connecting them together, and a horizontal frame (17) is bridged between the engine frames (16, 16) at a predetermined interval behind the bumper (5), and the engine (E) ), A muffler (2) connected to an exhaust pipe (15) of the engine (E) is provided below and in front of and below the muffler (2).
In a tractor which is covered with the muffler (2) and forms an exhaust path (4) through which the cooling air of the muffler (2) passes, a tail pipe (23) provided in the muffler (2) with exhaust gas in the muffler (2) ), The air is exhausted above the bumper (5), and the front end of the exhaust path (4) is exhausted by the exhaust formed by the bumper (5), the horizontal frame (17), and the engine frame (16, 16). A muffler cooling structure for a tractor, wherein the muffler (2) is connected to an air outlet (6) to discharge the cooling air from the muffler (2) upward.