JPH0755662B2 - Combine mission - Google Patents

Description

Description: (a) Field of Industrial Application The present invention relates to a combine mission including a pre-processing auxiliary transmission section and a traveling system transmission section, and more specifically, to a transmission component incorporated in a mission case. Arrangement and its structure.

(B) Conventional technology Conventionally, the mission in combine harvesters is disclosed in
As disclosed in Japanese Patent No. 0718, the main / sub transmission part of the traveling system, the left and right side clutches / brake parts, etc. are built in one mission case, and the combine operates the traveling system by operating these parts. The vehicle is traveling at an appropriate speed.

Further, as shown in Japanese Utility Model Laid-Open No. 54-76232, the main transmission is arranged on the upstream side of the transmission, and the traveling system auxiliary transmission section, the pretreatment system transmission section, the left and right side clutches / brake sections, etc. It is also known to be built in a separate case.

(C) Problems to be Solved by the Invention However, of the above-mentioned conventional missions, the former one has the traveling transmissions housed in the same case,
The mission case becomes large and hinders the assembling work. In particular, in order to disassemble and repair the traveling auxiliary transmission, the large mission case must be disassembled, and it is troublesome to remove the crawler and remove it from the machine body. It is difficult to maintain because it takes time. Moreover, since the input shaft of the mission case is branched and transmitted to the threshing drive system to drive the threshing section at a constant rotation according to the harvested grain, it also has a drawback of making the mission case larger. . Further, there is no disclosure regarding the transmission structure for the pretreatment system transmission unit.

In the latter case, the main transmission is built in a separate case, so the mission case does not become larger than in the former case, but the traveling system auxiliary transmission section and the preprocessing system transmission section are left and right side. Since it is built in the same case together with the clutch / brake device, the mission case also becomes large and maintenance is poor. Moreover, the main transmission is arranged on the upstream side of the transmission of the pre-treatment system transmission unit to transmit the power changed by the main transmission unit to the pre-treatment system transmission unit, so that the raising posture of the grain can be maintained regardless of the increase or decrease of the vehicle speed. However, since the main transmission also has a forward / rearward speed change portion of the traveling system, when the vehicle is reverse-shifted, the pre-treatment system transmission section rotates in the reverse direction. Each part connected to the device will be damaged. Therefore, a special device such as a one-way clutch needs to be additionally provided in the pretreatment system transmission section, which is one of the factors causing a failure and has a drawback of being complicated and expensive.

(D) Means for Solving the Problem The present invention is intended to solve the above-mentioned problems, and for example, as shown in FIG. 1, a mission case may be a main case 9 and side surfaces of the main case. The sub-case 44 is detachably overlapped and fixed to the main case 9 and extends upward.
In addition to incorporating the left and right side clutch / brake unit 11, the pre-processing system auxiliary transmission unit 45 and the traveling system auxiliary transmission unit 46 are incorporated in the sub case 44, and the power from the engine 3 is transmitted via the continuously variable transmission 47. Is transmitted to the drive shaft 50 pivotally supported by the sub case, branched and transmitted from the drive shaft to the pretreatment system auxiliary transmission unit 45 and the traveling system auxiliary transmission unit 46, and further from the traveling system auxiliary transmission unit 46 to the traveling system. It is characterized in that it is configured to be transmitted to the forward / rearward travel switching section 10 and the left and right side clutch brake section 11.

(E) Action Based on the above configuration, the power from the engine 3 is a continuously variable transmission.
The rotation is transmitted to the drive shaft 50 via 47, and the rotations of the pretreatment system auxiliary transmission unit 45 and the traveling system auxiliary transmission unit 46 are simultaneously transmitted by the rotation of the drive shaft 50. Then, the pre-processing system sub-transmission unit 45 can be appropriately transmitted by the switching operation to the pre-processing unit 7 and driven, and the traveling-system sub-transmission unit 46 can be driven.
When the switching operation is performed, the rotation is appropriately changed and the rotation is transmitted to the traveling system forward / reverse switching portion 10, and the forward / reverse traveling is switched by the switching portion and transmitted to the left and right side clutch / brake portion 11.

(F) Example Hereinafter, an example according to the present invention will be described with reference to the drawings.

The combine C has a sprocket S as shown in FIG.
Airframe 2 supported by a crawler 1 driven by
The engine 3 is mounted on one side of the machine body 2 on the rear side, the driver's seat 5 is arranged on the front side, and the Glen tank 6 is installed between them.
An automatic thresher is installed on the other side. Furthermore, Aircraft 2
A pre-processing section 7 is arranged in the front of the so as to be able to move up and down, and a mission case 9 is mounted below the machine body 2 at the rear thereof.

As shown in FIG. 1, the mission case 9 has a main transmission 13 that houses a traveling system forward / reverse switching unit 10, a side clutch / brake unit 11, and a traveling system driving unit 12. And the traveling system forward / reverse switching unit
Reference numeral 10 has clutch shafts 15 and 16 and a center shaft 17, which are rotatably supported by the transmission case 9, respectively. Forward clutch hydraulic clutch 19 and reverse hydraulic clutch 20 are installed on the clutch shafts 15 and 16, respectively. Has been done. Further, the forward clutch 19 is positioned horizontally on the front side of the fuselage and the reverse clutch 20 is positioned on the rear side of the fuselage, and the center shaft 17 is rotatably disposed at the lower center of these clutches 19, 20. It is arranged. Further, the forward hydraulic clutch 19 and the reverse hydraulic clutch
20 clutches have exactly the same shape, and these clutches 1
9 and 20 are gears 2 fixed to clutch shafts 15 and 16, respectively
1, 22 are provided and cases 23, 25 are joined to the back surface thereof. And, in the cases 23 and 25, the piston 26,
27 is slidably fitted to the shafts 15 and 16, respectively, and the pistons 26 and 27 are urged toward the gear 21 and the gear 22 by return springs 29 and 30, respectively. Further, sleeve-shaped gears 31 and 32 are rotatably fitted to the clutch shafts 15 and 16, respectively, and these gears 31 and 32 are provided with a large number of friction plates at their respective ends, and The plates are alternately combined with a large number of friction plates installed in the cases 23 and 25 of the reverse and reverse hydraulic clutches 19 and 20, respectively. A small-diameter gear 33 and a large-diameter gear 35 are fixedly mounted on the center shaft 17, and the sleeve-shaped gears 31, 32 are meshed with the large-diameter gear 35, respectively. A gear 36 is splined to one end of the shaft 15, and is meshed with an idle gear 37 rotatably arranged on the upstream side of the transmission.

On the other hand, the side clutch / brake unit 11 has left and right side clutches CL, CR and left and right side brakes BL, BR,
The left and right side clutches CL, CR are dock gears 41, 41r slidably fitted to one end of left and right steering shafts 39l, 39r rotatably installed in the case 9, and the steering shafts 39l, 39r.
It is composed of a center gear 40 rotatably installed in the middle part of the. The center gear 40 is meshed with the gear 33 to transmit the rotation of the engine 3, and is properly engaged with the left and right dock gears 41 and 41r to transmit the rotation to the left and right steering shafts 39l and 39r. There is. Further, the traveling system drive unit 12 is provided with axles 42l, 42r having a sprocket S fixedly provided at one end from the lower portion of the mission case 9 so as to project left and right, and further, the other end of each of the axles 42l, 42r has a large diameter Gears 43, 43 are fixed, and these gears 43, 43 are meshed with the dock gears 41, 41r, respectively.

A transmission case 44 is integrally fixed to the upper side surface of the transmission case 9 by a plurality of bolts B. The pretreatment sub-transmission unit 45 and the traveling sub-transmission unit 46 are attached to the case 44. And a shaft supporting the driven pulley 49 of the continuously variable transmission 47 from the case 44.
One end 50 is rotatably supported by the case 44 and protrudes. Further, the pre-processing system sub-transmission unit 45 has a transmission shaft 51 having one end protruding outside the case 44 and the other end rotatably supported inside the case 44, and the shaft 51 protrudes from the case 44. A pre-treatment transmission pulley 52 is fixedly installed in this portion, and gears 53, 54 having different numbers of teeth are rotatably installed in the inner part of the case 44 of the shaft 51 and between the gears 53, 54. The shifter 55 is fitted so that it can slide only. In addition, the traveling system auxiliary transmission unit 46 is attached to the case 44.
Has a shaft 56 rotatably supported therein, and transmission gears 57, 59 are rotatably installed on the shaft 56, respectively, and a shifter 60 is slidable between these gears 57, 59. Is fitted to. Further, gears 61, 62, 63 having different numbers of teeth are fixedly provided on the inner portion of the sub case 44 of the shaft 50, and these gears 61, 62 are meshed with the transmission gear 57 and the gear 53, respectively. Further, the gear 63 is simultaneously meshed with the gear 54 and the transmission gear 59. In addition,
A gear 65 is fixedly installed at the end of the shaft 56, and the gear 65 meshes with the idle gear 37 to rotate the rotation appropriately changed by the traveling system sub-transmission unit 46. Ten
Have been communicated to.

On the other hand, a counter case 66 is arranged above the integrated mission cases 9 and 44.
A shaft 67 extends through and is supported by 66, and a hydraulic pump P is bolted to the outside thereof. Further, the shaft 67 is supported at its one end by a drive-side split pulley 69 and its tip is supported by a bracket 70 fixed to the machine body, and the drive-side split pulley 69 is connected to the driven-side split pulley 49. The endless belt b is wound around the continuously variable transmission 47.
Are configured. A transmission pulley 71 is fixed to the other end of the shaft 67, and a gear 72 is fixed to the inner portion of the counter case 66. Further, an endless belt d is wound around the transmission pulley 71, and the pulley 71 is connected to the belt d.
The rotation of the engine 3 is transmitted via. The hydraulic pump P has a driving shaft 73 rotatably supported inside the counter case 66.
A gear 75 is fixed to one end of the
Is meshed with.

Further, as shown in FIG. 2, the plurality of bolts B fixing the transmission case 44 to the main transmission case 9 have a plurality of long holes 44 a formed in the sub case 44.
Are fastened to the main case 9 by inserting them into the main case 9 respectively. By loosening the bolts B ... and swinging the sub case 44, the elongated holes 44a are guided by the bolts B. It can rotate around the clutch shaft 15 shown in FIG. As a result, the driven side split pulley 49 installed in the sub case 44 can be moved. Therefore, the axial distance between the pulley 49 and the drive side split pulley 69 can be changed to change the continuously variable transmission 47.
The tension of the endless belt b can be adjusted.

Since the present embodiment is configured as described above, when the rotation of the engine 3 is transmitted to the transmission pulley 71 by the endless belt d, the drive side split pulley 69 is rotated together with the shaft 67 to drive the continuously variable transmission 47. While driving, the shaft 73 is rotated via the gear 72 and the gear 75 to drive the hydraulic pump P. Further, the shaft 50 rotated by the drive of the continuously variable transmission 47 rotates its rotation by the gears 62, 63 of the gear 5 of the pretreatment system auxiliary transmission unit 45.
3, 54 and gears 61, 63 are transmitted to the transmission gears 57, 59 of the traveling system auxiliary transmission unit 46, respectively, and these gears 53, 54, 57, 59 are simultaneously rotated. When the shifter 55 is switched, the transmission shaft is transmitted from the gear 53 or the gear 54 via the shifter 55.
The rotation is transmitted to 51, the transmission pulley 52 is rotated at the same time, and the pretreatment unit 7 is driven. When the shifter 60 is switched, the appropriately rotated rotation is transmitted from the transmission gear 57 or the transmission gear 59 to the shaft 56 via the shifter 60, and the rotation is further transmitted to the gear 36 via the idle gear 37. It

On the other hand, the traveling system forward / reverse switching unit 10 rotates the gear 21 and the forward hydraulic clutch 19 when the clutch shaft 15 is rotated by the gear 36, and the reverse hydraulic clutch 20 via the gear 21 and the gear 22. Is also rotated at the same time. When pressure oil is fed from the hydraulic pump P to the forward clutch 19, the piston 26 is moved and presses a large number of friction plates, whereby the free gear 31 is rotated together, and Forward rotation is transmitted to the large diameter gear 35 by the gear 31. And
The center shaft 17 rotated by the gear 35 is a small diameter gear.
Forward rotation is transmitted to the center gear 40 of the side clutch / brake unit 11 via 33. Then, the center gear 40 is rotated by the appropriate operation of the side clutch / brake unit 11 via the left and right dock gears 41, 41r and the gears 43, 43, and the left and right axles 42l, 42r.
Further, the axles 42l, 42r drive the crawler 1 via the sprocket S to move the combine C forward.

Further, when pressure oil is fed into the reverse hydraulic clutch 20, the piston 27 is moved and presses a large number of friction plates, whereby the gear 32 in the free state is rotated together with the clutch shaft 16 and the large diameter gear 35. Reverse rotation is transmitted to. And the gear
The small-diameter gear 33, which is rotated in reverse with 35, transmits the rotation to the left and right axles 42l, 42r in the same manner as the normal rotation, and further drives the crawler 1 via the sprocket S to move the combine C backward.

(G) Effects of the Invention As described above, according to the present invention, (1) the mission case includes the main case 9 having the traveling system forward / reverse switching section and the left and right side clutches / brake sections built therein, and the pre-processing system auxiliary shift. By dividing the sub-case 44 into which the part 45 and the traveling system sub-transmission part 46 are installed, each case can be made lighter and smaller, and the assemblability can be improved.

(2) Further, since the sub case 44 is removably superposed and fixed on the side surface of the main case 9, when a failure occurs in the pretreatment system auxiliary transmission unit 45 or the traveling system auxiliary transmission unit 46, Repairing can be easily performed by simply removing the sub case 44 from the main case 9, and the maintainability can be improved.

(3) Moreover, the pretreatment system auxiliary transmission unit 45 and the traveling system auxiliary transmission unit
46, the rotary power that has been changed by the continuously variable transmission 47 provided on the upstream side of the transmission can be further changed in speed by the pretreatment sub-transmission portion 45 and transmitted to the pretreatment portion. The preprocessing work can be performed by appropriately rotating the working portion according to the above, and the traveling system auxiliary transmission portion 46 can also select an appropriate vehicle speed according to the working traveling or the road traveling.

(4) Furthermore, since both auxiliary transmission parts 45 and 46 are configured to branch and transmit from the drive shaft 50 in the same sub case 44, some of the transmission gears provided on the drive shaft 50 can be used for both. It is possible to configure a sub transmission unit by using the sub case 44
Can be more compact and inexpensive.

(5) In addition, the pretreatment system auxiliary transmission unit 45 and the traveling system auxiliary transmission unit
Since 46 is arranged on the transmission upstream side of the traveling system forward / reverse switching unit 10 and the left and right side clutch / brake unit 11, the preprocessing system auxiliary transmission unit 45 is not affected by the forward / reverse switching of the traveling system forward / reverse switching unit 10 at all. Without being transmitted, only one-way rotation is transmitted at all times. Therefore, without intervening a special device such as a one-way clutch, the pre-processing system auxiliary transmission unit 45 is rotated in one direction after being shifted by the continuously variable transmission, and is proportional to the vehicle speed without changing the grain stem orientation or the like. It can be driven at an appropriate rotation speed.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a mission case according to the present invention, FIG. 2 is a side view thereof, and FIG. 3 is a side view showing the entire combine. 3 ... Engine, 9 ... Main case, 10 ... Travel system forward / reverse switching section, 11 ... Left and right side clutch / brake section, 44 ... Sub case, 45 ... Pre-processing system auxiliary transmission section, 46 ...
… Auxiliary transmission section of the traveling system, 47 …… Continuous transmission, 50 …… Drive shaft.

Claims (1)

[Claims] 1. A combine mission comprising a mission case including a pre-processing system auxiliary transmission section, a traveling system auxiliary transmission section, a traveling system forward / reverse switching section, and left and right side clutch / brake sections. The main case includes a case and a sub case that is detachably overlapped and fixed to a side surface of the main case and extends upward, and the main system includes a traveling system forward / reverse switching section and left and right side clutches / brake sections. A preprocessing system auxiliary transmission unit and a traveling system auxiliary transmission unit are built in the sub case, and the power from the engine is transmitted to the drive shaft pivotally supported by the sub case through the continuously variable transmission, and the drive shaft is transmitted from the drive shaft. It branches and is transmitted to the pre-processing system auxiliary transmission unit and the traveling system auxiliary transmission unit, and from the traveling system auxiliary transmission unit to the traveling system forward / reverse switching unit and the left and right side clutch brake units. Motion to combine the mission formed by.