JP4973211B2 - Combine with hydraulic oil cooling structure for hydraulic continuously variable transmission - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To efficiently cool the hydraulic fluid of an HST (hydraulic static transmission) that is installed in a surrounded narrow space, in a combine harvester. <P>SOLUTION: A transmission case (3) in an erected state is installed between a threshing apparatus (1) and a reaping apparatus (15), and the HST (4) is arranged in the upper part of the transmission case (3). A hydraulic pipe (5) for connecting a hydraulic circuit inside the HST (4) to the transmission case (3) is arranged in the lateral parts of an engine-cooling fan (6) and a transmission-section fan (7) and installed, by making a plurality of turns meander inside the rotation loci of both the fans (6 and 7), in a side view. <P>COPYRIGHT: (C)2008,JPO&amp;INPIT

Description

The present invention, a hydraulic stepless transmission provided on the driving path of the run line device (hereinafter, referred to as "HST") it relates combined with a cooling structure of.

A crawler travel device is used as the combine travel device, and HST is used for shifting the travel speed. The HST is integrally attached to the transmission case in the vicinity of the control device, and is arranged near the engine. (Refer to FIG. 1, FIG. 2, FIG. 4, FIG. 6, and FIG. 8 of JP-A-2003-116329)
JP 2003-116329 A

  In the above-described prior art, the HST is attached to a transmission case disposed in a narrow space surrounded by the harvesting device and the threshing device on the combine body and in the vicinity of the engine, and oil in the transmission case is used as hydraulic oil. Therefore, there has been a problem that this hydraulic oil is overheated and easily malfunctions.

  Accordingly, an object of the present invention is to efficiently cool the hydraulic fluid of HST provided in the enclosed narrow space.

The present invention takes the following technical means in order to solve the above-described problems.
That is, the invention according to claim 1 is provided with a cutting device (15) on the front side of the vehicle body (11) provided with the crawler traveling device (13), and a cockpit (16) is provided behind the cutting device (15). A cab (17) is provided, and a threshing device (1) is provided at a left rear portion of the cab (17) in the upper part of the vehicle body (11), and a cab (17) on the right side of the threshing device (1). In a combine provided with a Glen tank (18) in a rear part of the rear and an engine (8) for driving the crawler traveling device (13), the mowing device (15) and the threshing device (1), the threshing device ( 1) and a cutting device (15) are provided with a transmission case (3) for driving the crawler traveling device (13) in an upright state , and the engine (8) is installed behind the transmission case (3). Threshing device ( ) To place the power transmission portion of the belt (9) for transmitting power, the the upper portion of the transmission case (3) Place a hydraulic continuously variable transmission having a cooling fan (26) (4), the The hydraulic pipe (5) that connects the hydraulic circuit in the hydraulic continuously variable transmission (4) and the transmission case (3) is located in the rotation locus of the engine cooling fan (6) that cools the engine (8) in a side view. the arranged plurality of times to meander over the rotational locus of the power transmission unit (9) transmission unit cooling fan (7) for cooling a discharge after cooling by the engine cooling fan (6) and the transmission of cooling fan (7) and combined with the hydraulic oil cooling structure of the oil圧無variable transmission you characterized in that is positioned in the pass band of the wind.

According to a second aspect of the present invention, the transmission cooling fan (7) is disposed below the engine cooling fan (6) in a side view, and the engine cooling fan (6) and the transmission cooling fan (7). The hydraulic continuously variable transmission (4) is provided with a cooling fluid (26) for cooling the hydraulic continuously variable transmission (1).
The invention described in claim 3 is provided with a U-shaped support plate (27) attached to the threshing device (1) side, and the engine cooling fan (6) and the transmission portion cooling are mounted on the support plate (27). A plurality of concave grooves (28) opened toward the downwind of the exhausted air after cooling by the fan (7) are formed, and the hydraulic pipe (5) is fitted and held in the concave grooves (28). It is set as the combine provided with the hydraulic fluid cooling structure of the hydraulic continuously variable transmission of 1 or Claim 2.
According to a fourth aspect of the present invention, a wire (31) for locking the crawler traveling device (13) by applying a brake in the transmission case (3) is attached to the brake plate (38), and the brake plate (38) When the brake pedal arm (34) and the cam plate (32) are fixed to the parking shaft (33) and the pedal (35) at the tip of the brake pedal arm (34) is depressed to the maximum depression position, the cam plate (32) The second protrusion (46) formed on the lock plate (36) is engaged with the first protrusion (45) formed on the first shaft (45) to hold the rotational position of the parking shaft (33) at the brake operating position, An unlocking wire (37) connected to the lock plate (36) is connected to a transmission lever (20) for shifting the hydraulic continuously variable transmission (4). The lock release wire (37) is pulled by tilting 20) in the left-right direction, and the second protrusion (46) is disengaged from the first protrusion (45) to release the braking action. Or it is set as the combine provided with the hydraulic-oil cooling structure of the hydraulic continuously variable transmission of Claim 2 or Claim 3.

According to the first aspect of the invention, the output of the hydraulic stepless transmission (4) is to drive the transmission case (3) has been crawlers transmitted to the transmission mechanism provided inside the (13), the The hydraulic oil used at the time does not provide a special cooling device, and in the side view, in the rotation locus of the engine cooling fan (6) , the transmission cooling fan (7) , and the transmission section for cooling the power transmission section (9) A hydraulic pipe 5 that is arranged in a meandering manner a plurality of times over the rotation trajectory of the cooling fan (7) and is positioned in the passage region of exhaust air after cooling by the engine cooling fan (6) and the transmission portion cooling fan (7). is cooling while passing through, it is possible to maintain a good transmission operating condition.
According to the invention described in claim 2, in addition to the effect of the invention described in claim 1, the hydraulic continuously variable transmission (4) itself can be cooled by the cooling fan (26).
According to the invention described in claim 3, in addition to the effects of the invention described in claim 1 or claim 2, it is difficult for the sawdust to be caught on the attachment portion between the support plate (27) and the hydraulic pipe (5).
According to the invention described in claim 4, in addition to the effect of the invention described in claim 1, 2 or 3, the shift lever (20) for shifting the hydraulic continuously variable transmission (4) is tilted left and right. The parking brake can be released.

Next, embodiments of the present invention will be described with reference to the drawings.
In this specification, the left side and the right side refer to directions when the combine 10 is directed in the forward direction.

  As shown in FIG. 1, a crawler traveling device 13 having a pair of left and right traveling crawlers 12, 12 traveling on the soil surface is disposed on the lower side of the vehicle body 11 of the combine 10. A reaping device 15 is provided. A cab 17 having a cockpit 16 is provided behind the reaping device 15, and a threshing device 1 for threshing / selecting the cereals carried from the reaping device 15 by taking it over the vehicle body 11. A Glen tank 18 that is provided on the left rear side of the cab 17 and temporarily stores the grains threshed and selected by the threshing apparatus 1 is disposed on the right side of the threshing apparatus 1 after the cab 17. The auger 19 is connected to the rear part of the grain tank 18 so that the grains in the grain tank 18 are discharged to the outside of the combine 10.

In the combine 10, the operator sits on the cockpit 16 and operates the HST main transmission lever (transmission lever) 20 and the sub transmission lever 21 to change the power of the engine 8 through the HST 4 and the main transmission mechanism in the transmission case 3. Then, the vehicle travels at an arbitrary speed by being transmitted to the left and right traveling crawlers 12 and 12. Further, the operator can make various turns by tilting the steering lever 22 left and right. That is, when the steering lever 22 is tilted in the direction in which the combine 10 is to be turned, a speed difference is given to the left and right traveling crawlers 12 and 12 to change the traveling direction.

  When the harvesting operation of the cereal is performed by running the combine 10, the cereal harvested by the reaping device 15 is delivered to the feed chain 23 of the threshing device 1 by the cereal transportation device 2, and the tip of the threshing device 1 The threshed and threshed grains are shredded by a cutter 24 provided at the rear of the threshing apparatus 1 and released to the field.

The engine 8 that drives the threshing device 1, the crawler traveling device 13, the reaping device 15, and the like is mounted on the front side of the vehicle body 11, on the left side of the cab 17, below the cereal receiving base 29 of the threshing device 1. . The vertically long transmission case 3 has a main transmission transmission mechanism inside, a sprocket shaft 25 that projects to the left and right traveling crawlers 13 and 13 at the bottom, and an HST (hydraulic continuously variable transmission) 4 mounted at the top. is doing. On the rear side of the transmission case 3, a power transmission unit 9 that transmits power from the engine 8 to the threshing device 1 using a belt and a pulley is disposed.

The HST4 is connected to the transmission case 3 and the transmission output shaft is connected to the main transmission mechanism, and the oil supplied to the internal hydraulic pump and hydraulic motor is also used for lubrication in the transmission case 3 and used in the HST4. A hydraulic pipe 5 for returning oil is arranged outside the case, and is meandered a plurality of times to be connected to the transmission case 3. The position of the hydraulic pipe 5 is positioned in the exhaust air passage area after cooling of the engine fan 6 that cools the engine 8 and the transmission part cooling fan 7 provided in the power transmission part 9 so as to be cooled. Reference numeral 26 denotes an HST fan (cooling fan) that cools the HST 4 itself.

The hydraulic pipe 5 is fitted and held in a plurality of concave grooves 28 formed in a support plate 27 bent in a U-shaped side view attached to the threshing device 1 side. The concave groove 28 is leeward with respect to the flow direction A of the exhaust air so that the sawdust is not easily caught on the attachment portion with the hydraulic pipe 5.

5 and 6 show an interlocking mechanism of the parking pedal 35 and the parking lever 41 provided at the foot of the cab 17.
When the brake drum in the transmission case 3 pulls the wire 31 in the cable 30, the brake drum is tightened and the crawler traveling device 13 is locked to stop the traveling. The wire 31 is fixed to the parking shaft 33. When the parking shaft 33 is attached to the brake plate 38, the brake plate 38 moves forward and the wire 31 is pulled.

In addition to the brake plate 38, the cam plate 32 and the brake pedal arm 34 are fixed to the parking shaft 33. When the pedal 35 of the brake pedal arm 34 is depressed, the parking shaft 33 rotates and the brake plate 38 moves forward. Then, the wire 31 is pulled and the parking brake acts. The cam plate 32 that rotates together with the parking shaft 33 is always pulled in the direction in which the wire 31 is loosened by the tension spring 40 hooked on the pin 51 and the pin 50 on the wire mounting plate 52 side. Further, when the protrusion (first protrusion) 45 is formed on the cam plate 32 and the pedal 35 is stepped on to the maximum, the protrusion (second protrusion) 46 of the lock plate 36 is engaged with the protrusion 45. The parking shaft 33 is held at the brake operating position. The lock plate 36 is always pressed against the cam plate 32 by a tension spring 47, and a lock release wire 37 is connected to the opposite side of the tension spring 47 with respect to the fulcrum shaft 48. The lock release wire 37 is connected to the HST main transmission lever 20. When the HST main transmission lever 20 is connected and tilted to the left or right, the lock release wire 37 is pulled to release the lock plate 36 from the cam plate 32, allowing the cam plate 32 to return and releasing the parking brake.

  On the side of the cab 17, a parking lever 41 is provided so that the operator can operate it in a state where it is lowered from the combine 10. A connecting plate 53 connected to the cam plate 32 and a return tension spring 42 are connected to the plate 44 fixed to the rotating shaft 43 of the parking lever 41. When the parking lever 41 is tilted forward, the connecting plate 53 is moved. By pulling the cam plate 32, the parking shaft 33 rotates and the parking brake acts. The tension spring 42 is hooked on the pin 49 of the plate 44 from above, the other end is hooked on the pin 51 from below and the parking lever 41 is tilted, and the axial direction of the parking lever 41 and the tension acting direction of the tension spring 42 Are substantially parallel to each other so that the pulling force is effective and the parking lever 41 can be unlocked lightly.

7, 8, and 8 are perspective views of the right side door in a configuration in which the driver's seat 17 is enclosed by a cabin.
In FIG. 7, the front half 61 of the right side door 60 is directed upward from below, and transparent acrylic plates or glass plates are sequentially projected sideways, so that the operator of the driver's seat 17 keeps the right side door 60 closed and the aircraft. The lower right side of the can be seen.

  In FIG. 8, the upper half of the right side door 62 is used as a window 63 with the top projecting sideways so that the operator of the driver's seat 17 can see the lower right side of the aircraft with the right side door 60 closed.

In FIG. 9, with the configuration of FIG. 8, the upper side of the window 63 is suspended by a hinge 64, and the window 63 is opened so that the lower right side of the machine body can be seen directly.
10 and 11 show a configuration in which the driver's seat 17 is surrounded by a simple pipe-shaped cabin, and loop-shaped side pipes 70 and 71 are erected on the left and right sides. 73, 74, 75, and 76, the front side pipe 72 serves as a handrail when the operator gets forward. Further, the side pipe 71 on the center side of the fuselage is connected to the side of the driver's seat 17 with a pipe 77 at the front and back, and this pipe 77 is used as a pivot fulcrum shaft for the HST main transmission lever 20 and the like. In addition, a hood 78 is stretched over the upper horizontal pipes 73, 74, 75, and 76 to protect the sun.

  In FIG. 12, a gate-shaped front frame 80 is erected on the front side of the driver's seat 17, a plurality of work lamps 81 are mounted side by side on the front side of the upper horizontal rail, and a sun visor 82 is mounted on the rear side of the upper horizontal rail. Yes.

13 and 14, a T-shaped frame 83 is provided extending from the rear side of the driver's seat 17 to the front upper side, and a plurality of work lamps 84 are attached to the upper horizontal beam.
FIG. 15 shows a configuration in which the driver's seat 17 is enclosed by a cabin 86, and a pipe-like hand catcher 85 substantially equal to the height of the cabin 86 is provided in front of the right side door 87 provided to be opened and closed by a hinge 88. It also serves as a handle for getting on and off the operator.

Combine side view Partially enlarged side view of combine Combined parts enlarged side view Expanded front view of combine parts Partially enlarged plan view of the combine Partially enlarged side view of combine Plane cross section of combine mission case Plane cross section of combine mission case Plane cross section of combine mission case Combined side view of a reference example Overall view of the combine in the reference example Combined side view of a reference example Combined side view of a reference example Combine the entire front view of the Reference Example Partially enlarged perspective view of the combine

1 threshing apparatus 3 Transmission Case 4 HST (hydrostatic transmission)
5 Hydraulic pipe 6 Engine cooling fan 7 Transmission section cooling fan
8 engines
9 Power transmission part
11 body
13 crawler travel device 15 mowing device
16 controls
17 cabs
18 Glen Tank
20 HST main shift lever (shift lever)
26 HST fan (cooling fan)
27 support plate
28 grooves
31 wires
32 cam plate
33 parking axes
34 brake pedal arm
35 pedals
37 unlocking wire
38 brake plates
45 protrusions (first protrusion)
46 protrusions (second protrusion)

Claims (4)

A cutting device (15) is provided on the front side of the vehicle body (11) provided with the crawler traveling device (13), and a cab (17) provided with a cockpit (16) is provided behind the cutting device (15), A threshing device (1) is provided on the left rear portion of the cab (17) in the upper part of the vehicle body (11), and a grain tank (18 is provided on the rear portion of the cab (17) on the right side of the threshing device (1). ), And a combine equipped with an engine (8) for driving the crawler travel device (13), the reaping device (15), and the threshing device (1), the threshing device (1) and the reaping device (15) A transmission case (3 ) for driving the crawler travel device (13) is provided between the engine (8) and the threshing device (1) on the rear side of the transmission case (3). Belt movement Transmission part (9) is arranged, wherein an upper portion of the transmission case (3) Place a hydraulic continuously variable transmission having a cooling fan (26) (4), the hydraulic stepless transmission (4) of the The hydraulic pipe (5) connecting the hydraulic circuit and the inside of the transmission case (3) is cooled in the rotation locus of the engine cooling fan (6) for cooling the engine (8) and the power transmission unit (9) in a side view. It has been arranged to meander multiple times over the rotation trajectory of the transmission section cooling fan (7 ) , and is located in the passage area of exhaust air after cooling by the engine cooling fan (6) and the transmission section cooling fan (7). Combine with hydraulic oil cooling structure of the oil圧無variable transmission you characterized. In a side view, the transmission cooling fan (7) is disposed below the engine cooling fan (6), and a hydraulic continuously variable transmission is provided in front of the engine cooling fan (6) and the transmission cooling fan (7). (4) The combine provided with the hydraulic oil cooling structure for the hydraulic continuously variable transmission according to claim 1, wherein a cooling fan (26) for cooling is disposed. A U-shaped support plate (27) is attached to the threshing device (1) side, and the support plate (27) is cooled by the engine cooling fan (6) and the transmission cooling fan (7). The hydraulic pressure according to claim 1 or 2, wherein a plurality of concave grooves (28) opened toward the lee of the exhaust air are formed, and the hydraulic pipe (5) is fitted and held in the concave grooves (28). Combine with hydraulic oil cooling structure for continuously variable transmission. A wire (31) for locking the crawler traveling device (13) by applying a brake in the transmission case (3) is attached to the brake plate (38), the brake plate (38), the brake pedal arm (34), and the cam. When the plate (32) is fixed to the parking shaft (33) and the pedal (35) at the tip of the brake pedal arm (34) is depressed to the maximum depressed position, a first protrusion (formed on the cam plate (32) ( 45) is engaged with the second protrusion (46) formed on the lock plate (36) to hold the rotational position of the parking shaft (33) at the brake operating position, and is connected to the lock plate (36). The unlocking wire (37) is connected to a transmission lever (20) for shifting the hydraulic continuously variable transmission (4), and the transmission lever (20) is tilted in the left-right direction. Thus, the unlocking wire (37) is pulled, and the second protrusion (46) is disengaged from the first protrusion (45) to release the braking action. A combine comprising the hydraulic oil cooling structure for the hydraulic continuously variable transmission according to claim 3.

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