TWI581701B - Combine harvesters - Google Patents

Description

Combine harvester

The invention relates to a combine harvester.

The combine harvester includes a traveling device, a harvesting device, and a threshing device, and performs harvesting, threshing, and screening while traveling. As a conventional combine harvester, for example, Patent Document 1 discloses a power transmission device such as a general-purpose combine harvester, that is, a grain bar harvested by a harvesting unit (harvesting device) is transferred to an upper threshing chamber by a conveying device (degranulation) In the threshing unit of the apparatus, the transported grain stem is threshed by the rotationally driven processing cylinder in the upper threshing chamber. The power transmission device of the universal combine harvester is a device that transmits the driving force of the engine to the harvesting device, the threshing portion of the threshing device, and the screening portion of the threshing device, and is configured to be disposed below the upper threshing chamber and the upper threshing chamber, respectively. A plurality of pulleys on both sides of the screening unit of the threshing apparatus; and a belt and a rotating shaft that connect the pulleys to each other.

[Prior Art Literature]

Patent Document 1: Japanese Patent Laid-Open Publication No. 2002-238341

However, since the power transmission device of the universal combine harvester described in Patent Document 1 has a plurality of pulleys provided on both sides of the upper threshing chamber and the screening unit, it is necessary to arrange the belts that connect the pulleys to each other. The left and right sides of the upper threshing chamber and the screening portion, or the rotating shaft that connects the pulleys to each other, transmits a driving force to the gear box of the upper threshing chamber. In this way, it is necessary to arrange the belts on both sides of the upper threshing chamber and the screening portion, or to make the rotating shaft pass through the gear box, and the space occupied by the power transmission device is enlarged, resulting in an increase in the size of the combine harvester itself, and thus there is still further improvement. room. Further, in the power transmission device of the universal combine harvester described in Patent Document 1, it is necessary to arrange the belts on both sides of the upper threshing chamber and the screening portion, or to pass the rotating shaft through the upper threshing chamber, thereby improving durability and maintenance. There is still room for further improvement in terms of ease of maintenance.

The present invention has been made in view of the above circumstances, and it is an object of the invention to provide a combine that increases the durability and maintainability by miniaturizing a power transmission device that transmits a driving force of an engine to a harvesting device and a threshing device.

In order to achieve the above object, the present invention takes the following technical measures.

In other words, the invention according to claim 1 is a combine harvester comprising: a harvesting device 5 provided at a front portion of the living body; a screening portion 6 provided at a left and right side of the grain container 8 and having a lower portion, and an upper threshing apparatus a threshing device 10 of the portion 7; and a power transmission device 9 provided at a front portion of the threshing device 10 and transmitting a driving force of the engine 3 to the harvesting device 5 and the threshing device 10, wherein the combiner is characterized by the power The transmission device 9 includes a first rotating member 91 that is rotationally driven by the driving force of the engine 3 and supplies a driving force to the screening unit 6; The first rotating member 91 is rotationally driven to transmit the driving force to the second rotating member 92 of the threshing portion 7; and is rotationally driven by the transmission of the driving force from the second rotating member 92. And the driving force is supplied to the third rotating member 93 of the above-described harvesting device 5.

The invention according to claim 2, wherein the second rotating member 92 is disposed above the first rotating member 91 and utilizes the first rotating member 91. The transmission of the driving force is rotationally driven to the processing cylinder 73 provided in the threshing unit 7, and the third rotating member 93 is disposed between the first rotating member 91 and the second rotating member 92 in the vertical direction. The transmission of the driving force of the two rotating members 92 drives the conveying device 56 provided in the harvesting device 5.

The invention according to claim 2, characterized in that the combine harvester according to claim 2 is characterized in that it includes a front threshing frame 23 which is disposed forward of the threshing apparatus 10 and formed to have a width. It is narrower than the threshing apparatus 10, and is disposed on the left side of the front end of the front portion of the threshing apparatus 10, and the first rotating member 91 is disposed behind the threshing front frame 23, and is rotated in front of the threshing front frame 23. The first support member 115 of the third rotating member 93 is freely supported.

The invention according to claim 3, wherein the first rotating member 91 is disposed in a space K formed between the threshing front frame 23 and the grain container 8 in the invention. And the second rotating member 92 and the third rotating member 93.

In addition, the invention described in claim 5 is as described in claim 4 The harvester is characterized in that the first belt 96 that interlocks the first rotating member 91 with the engine 3 is disposed to be biased against the second belt 107 that interlocks the second rotating member 92 with the first rotating member 91. The portion of the grain container 8 described above.

The invention according to claim 5, wherein the third belt 116 that interlocks the third rotating member 93 with the second rotating member 92 is disposed in comparison with the combine of claim 5; The second belt 107 is biased against the portion of the grain container 8.

The invention according to claim 7 is characterized in that the threshing front frame 23 has a structure in which two plate members 26 are arranged at intervals in the front-rear direction, and is rotatably provided. The second support member 94 that supports the first rotating member 91 and the first support member 115 are coupled to the plate member 26.

The invention according to claim 7 is characterized in that the combiner according to claim 7 is characterized in that the first tension roller 98 that applies tension to the first belt 96 is supported at the front end portion of the first roller support sheet 99. The base end portion of the first roller support piece 99 is rotatably attached to the front degranulation frame 23.

The invention according to claim 9 is characterized in that the combiner according to claim 8 is characterized in that the base end portion of the first roller support piece 99 is rotatably attached to the first tension support portion 100, and The first tension support portion 100 is detachably attached to the threshing front frame 23.

The effects of the present invention are as follows.

According to the present invention, it is possible to miniaturize the power transmission device 9 that transmits the driving force of the engine 3 to the harvesting device 5 and the threshing device 10, and can Maintenance of high combine harvesters.

1‧‧‧ Combine harvester

2‧‧‧ body frame

3‧‧‧ engine

3a‧‧‧Engine Pulley

4‧‧‧Traveling device

5‧‧‧ Harvesting device

6‧‧‧Screening Department

7‧‧‧Degranulation

8‧‧‧ Grain Container

9‧‧‧Power transmission device

10‧‧‧ threshing device

21‧‧‧Central horizontal framework

22‧‧‧ upper horizontal frame

23‧‧‧Degranulation front frame

24‧‧‧Processing room guide frame

25‧‧‧ plumb frame

26‧‧‧ board parts

27‧‧‧Operating seats

28‧‧‧ cab

41‧‧‧ Tracks

51‧‧‧ auger frame

51a‧‧‧floor

51b‧‧‧ left and right side panels

51c‧‧‧ Back panel

52‧‧‧Auger

53‧‧‧ Harvesting knives

54‧‧‧扒搂轮

55‧‧‧ Harvesting Department

56‧‧‧Transporting device

57‧‧‧Shell

58‧‧‧Transportation agency

61‧‧‧ screening room

62‧‧‧Shake screening department

63‧‧‧Air supply and air separation machine

71‧‧‧Processing room

73‧‧‧Processing cylinder

74‧‧‧Processing cylinder shaft

75‧‧‧Processing teeth

76‧‧‧Processing Network

81‧‧‧Draining auger

91‧‧‧First pulley (first rotating part)

91a‧‧‧ small diameter pulley

91b‧‧‧ Large diameter pulley

92‧‧‧Second pulley (second rotating part)

92a‧‧‧path pulley

92b‧‧‧ Large diameter pulley

93‧‧‧ Third pulley (third rotating part)

94‧‧‧Support parts (second support parts)

95‧‧‧ drive shaft

96‧‧‧First Belt

97‧‧‧First tension applying section

98‧‧‧First tension roller

99‧‧‧First roll support piece

100‧‧‧First tension support

101‧‧‧First Tension Bearing Department

102‧‧‧ bolt

103‧‧‧Stretched coil spring

104‧‧‧Support parts

105‧‧‧ Gearbox

106‧‧‧ drive shaft

107‧‧‧Second belt

108‧‧‧Second tension applying section

109‧‧‧Second tension roller

110‧‧‧Second roller support

111‧‧‧Rotating pin

112‧‧‧Second tension bearing

113‧‧‧Drawing coil spring

114‧‧‧Rotary axis

115‧‧‧Support metal parts (first support part)

116‧‧‧ Third Belt

117‧‧‧ Third tension applying section

118‧‧‧ Third tension roller

119‧‧‧third roll support piece

120‧‧‧Rotating pin

121‧‧‧ Third Tension Bearing Department

122‧‧‧Stretched coil spring

123‧‧‧Lined idler

124‧‧‧ Bearing

125‧‧‧With slot

125a‧‧‧ with the bottom of the slot 125

K‧‧‧ Space

L‧‧‧ track

Fig. 1 is a side view showing a schematic configuration of a combine harvester according to an embodiment.

Fig. 2 is a plan view showing a schematic configuration of a combine harvester according to an embodiment.

Fig. 3 is a side view of the power transmission device of the combine harvester of the embodiment as seen from the grain container side.

Figure 4 is a cross-sectional view taken along line a-b-c of Figure 3 .

Fig. 5 is a side elevational view showing, in an enlarged manner, a second tension supporting portion of the combine of the embodiment.

Fig. 6 is a cross-sectional view showing a liner type idler of the combine of the embodiment.

Fig. 7 is a transmission line diagram of the combine harvester of the embodiment.

Hereinafter, embodiments of the present invention will be described in detail based on the drawings. Further, the present invention is not limited to the embodiment. Further, the constituent members in the following embodiments include constituent members that can be easily replaced by those skilled in the art, or substantially the same constituent members.

(embodiment)

1 is a side view showing a schematic configuration of a combine harvester according to an embodiment, FIG. 2 is a plan view showing a schematic configuration of a combine harvester according to an embodiment, and FIG. 3 is a view showing a grain from a power transmission device of a combine of the embodiment. Side view of the container side, Figure 4 is along the abc line in Figure 3. Fig. 5 is a side elevational view showing a second tension support portion of the combine of the embodiment, Fig. 6 is a cross-sectional view of the inner idler of the combine of the embodiment, and Fig. 7 is a combine of the embodiment. Drive line diagram. In addition, in the following description, the front-back direction is the front-back direction of the combine harvester 1. Further, the front-rear direction is the traveling direction when the combine harvester 1 is advanced, and the front side in the forward direction is referred to as the front side and the rear side is referred to as the rear side. Further, the vehicle width direction is a direction orthogonal to the front-rear direction, and the right side on the front side in the forward direction is referred to as the right side, and the left side on the front side in the forward direction is referred to as the left side. Further, the vertical direction is a direction orthogonal to the front-rear direction and the vehicle width direction. These front and rear directions, the vehicle width direction, and the vertical direction are mutually textual.

The combine harvester 1 of the present embodiment shown in Fig. 1 is a general-purpose combine harvester capable of threshing, while harvesting grain rods such as rice, soybeans, and buckwheat while using the power generated by the engine 3 as a power source. As shown in FIGS. 1 and 2, the combine harvester 1 includes a machine body frame 2, an engine 3 as a power source, a traveling device 4, a harvesting device 5, a threshing device 10, a grain container 8, and a power transmission device 9.

The body frame 2 constitutes a frame-shaped structural member of the vehicle body of the combine harvester 1. As shown in Fig. 1, the body frame 2 includes a center horizontal frame 21 (corresponding to a frame, as shown in Fig. 3) provided at a side portion of a screening unit 6 to be described later of the threshing apparatus 10, and an upper level above the threshing device 7. Frame 22 (shown in Figure 3); threshing front frame 23; and process chamber guide frame 24.

As shown in FIG. 1, the threshing front frame 23 is disposed so as to stand upright in the vertical direction at a position forward of the threshing apparatus 10, and is formed to have a width ratio threshing. The width of the device 10 in the vehicle width direction is narrow. Further, the left end of the front threshing frame 23 coincides with the left end of the front portion of the threshing apparatus 10 (arranged at a position overlapping in the front-rear direction), and the right end of the front threshing frame 23 is disposed on the left side of the right end of the front portion of the threshing apparatus 10. . As shown in FIG. 3, the threshing front frame 23 is provided with two vertical frames 25 which are erected in the vertical direction at intervals in the vehicle width direction (only one of the front side is shown in FIG. 3); Two plate members 26 that are vertically overlapped with each other in the front-rear direction of the body frame 2 are connected to each other.

As shown in FIG. 3, the process chamber guide frame 24 is disposed between the upper horizontal frame 22, that is, the threshing device 7 and the threshing front frame 23, and connects the upper horizontal frame 22 and the threshing front frame 23. Moreover, as shown in FIG. 1, between the threshing front frame 23 and the grain container 8, that is, the screening part 6, the threshing apparatus 7, the threshing front frame 23, the conveyance apparatus 56 of the harvesting apparatus 5, the cab 28, and A space K is formed between the grain containers 8.

The engine 3 is mounted on the front side in the front-rear direction of the body frame 2. The engine 3 is a source of generation of the driving force used in the combine harvester 1. The engine 3 is an internal combustion engine, and a heat engine that converts the energy of the fuel into a mechanical operation and outputs the same as a rotational power by burning the fuel in the combustion chamber. Further, the engine 3 is disposed below the cab 28 on which the operator's seat 27 is provided on the body frame 2.

The traveling device 4 is provided on the lower side in the vertical direction of the body frame 2. The traveling device 4 drives the entire combine harvester 1 by the driving force from the engine 3. The traveling device 4 has a crawler belt 41. The crawler belts 41 are provided at a distance in the vertical direction of the body frame 2 at intervals in the vehicle width direction. Through The crawler belt 41 is driven by the driving force transmitted from the engine 3, so that the traveling device 4 causes the entire combine harvester 1 to travel forward and backward toward the front side.

The harvesting device 5 is provided at the front of the body frame 2. The harvesting device 5 is driven by the driving force from the engine 3 to harvest the grain bar, and transports the harvested grain bar to the threshing apparatus 10 or the like. The harvesting device 5 is driven by the driving force from the engine 3 to harvest the grain stem, and includes a harvesting portion 55 and a conveying device 56. The harvesting portion 55 is configured to include the auger frame 51 and the auger 52. The auger frame 51 includes a bottom plate 51a, a pair of right and left side plates 51b in the vehicle width direction, and a rear plate 51c. The auger 52 is disposed in the auger frame 51 in the vehicle width direction, and is rotatably supported. Further, the harvesting portion 55 is provided with a harvesting cutter 53 on the front side edge portion of the bottom plate 51a in the front-rear direction, and a pick-up wheel 54 for the grain stem is provided above the harvesting cutter 53. The idler wheel 54 is provided to freely adjust the position in the front-rear direction and the height in the vertical direction. The harvesting device 5 harvests and takes in the grain stem by the harvesting cutter 53 by driving the auger 52 or the like while traveling by the power transmitted from the engine 3.

The conveying device 56 is provided on the rear side of the harvesting portion 55, and more specifically between the harvesting portion 55 and the body frame 2. The conveying device 56 conveys the grain rod to the threshing device 10 by the driving force from the engine 3. The conveying device 56 is configured to include a casing 57 and a conveying mechanism 58. The outer casing 57 is formed in a quadrangular shape in cross section, and extends from the rear plate 51c of the auger frame 51 toward the threshing apparatus 10 on the rear side in the front-rear direction. The end portion of the outer casing 57 on the rear side in the front-rear direction is attached to the threshing front frame 23. Further, the outer casing 57 is attached to the threshing apparatus 7 by a connecting cylinder (not shown). The conveying mechanism 58 is disposed in the outer casing 57 inside. By driving the conveying mechanism 58 by the power transmitted from the engine 3, the conveying device 56 conveys the grain stem from the harvesting unit 55 to the threshing apparatus 10.

The threshing apparatus 10 is provided in the back of the harvesting apparatus 5, and the side of the grain container 8, and has the lower part part 6 and the upper threshing part 7. The screening unit 6 is disposed above the body frame 2 and behind the conveying device 56 of the harvesting device 5. Further, the screening unit 6 is provided on the side of the grain container 8 and on the left side of the body frame 2. The screening unit 6 is a device that separates inclusions such as straw of the grain stem and the grain by the threshing unit 7 by the driving force from the engine 3 . The screening unit 6 is provided at a side portion of the center horizontal frame 21, and includes a screening chamber 61, a shaking and screening unit 62 provided in the screening chamber 61, and a blower 63 and the like. The screening chamber 61 removes inclusions from the object to be treated containing the grain after being threshed by the threshing unit 7 by the blowing of the air blowing and swaying filter unit 62 driven by the air blowing means 63 driven by the driving force transmitted from the engine 3. The grain is screened and recovered. The object to be treated is the debris after the processing cylinder 73 of the threshing device 7 is threshed from the grain rod.

The threshing portion 7 is provided above the body frame 2 and behind the conveying device 56 of the harvesting device 5. Further, the threshing portion 7 is provided on the side of the grain container 8 and on the left side of the body frame 2. The threshing unit 7 threshes the grain rod conveyed by the driving force from the engine 3 . That is, the threshing portion 7 is a device that separates the grain from the grain rod harvested by the harvesting device 5.

The threshing portion 7 is disposed above the screening portion 6 and between the central horizontal frame 21 and the upper horizontal frame 22. The threshing unit 7 includes a processing chamber 71, a processing cylinder 73 provided in the processing chamber 71, a processing cylinder shaft 74, and the like. Processing cylinder 73 is formed in a cylindrical shape, and a plurality of processing teeth 75 are provided on the outer peripheral surface. The processing cylinder shaft 74 is formed in a cylindrical shape and inserted into the inner side of the processing cylinder 73 so as to be integrally rotatable. The processing cylinder shaft 74 and the processing cylinder 73 are integrally rotatably supported in the processing chamber 71 with the rotation axis as a rotation center. The axis of rotation is parallel to the front-rear direction of the combine harvester 1. The treatment cylinder 73 threshes the cereal rod while rotating the treatment cylinder shaft 74 with the driving force from the engine 3 while rotating the processing shaft. The lower side of the processing cylinder 73 of the processing chamber 71 in the vertical direction is surrounded by the processing net 76.

The grain container 8 is disposed on the side of the threshing apparatus 10. The grain container 8 is used to temporarily store the grain after threshing of the threshing device 10. The grain container 8 is connected to the discharge auger 81. The discharge auger 81 conveys the grain in the grain container 8 by the driving force from the engine 3 and goes to the outside of the grain container 8.

The power transmission device 9 is installed at the right end of the threshing front frame 23, and is provided at a side portion of the front portion of the threshing device 10 that faces the grain container 8. The power transmission device 9 transmits at least the driving force of the engine 3 to the conveying device 56 of the harvesting device 5, the screening portion 6 of the threshing device 10, and the threshing portion 7 of the threshing device 10.

As shown in FIGS. 3, 4, and 7, the power transmission device 9 includes a first pulley 91 (first rotating member), a second pulley 92 (second rotating member), a third pulley 93 (third rotating member), and the like. . These first pulleys 91 and second pulleys 92 and third pulleys 93 are disposed in the space K.

The first pulley 91 is rotationally driven by the driving force of the engine 3, and supplies the driving force to the screening unit 6. The first pulley 91 is integrally provided coaxially The small-diameter pulley 91a and the large-diameter pulley 91b are provided, and the large-diameter pulley 91b is disposed at a position offset from the small-diameter pulley 91a by the grain container 8, and is supported by a plate member 26 connected to the rear side of the threshing front frame 23. The (second support member) 94 is rotatably supported. Thereby, the first pulley 91 is disposed behind the threshing front frame 23 and below the processing chamber guide frame. A drive shaft 95 coupled to the screening unit 6 is attached to the first pulley 91.

A first belt 96 that connects the engine 3 and the first pulley 91 is stretched over the large diameter pulley 91b of the first pulley 91 and the engine pulley 3a attached to the output shaft of the engine 3. The first belt 96 is biased by the first tension applying portion 97.

As shown in FIG. 3 , the first tension applying unit 97 includes a first tension roller 98 , a first roller support piece 99 , a first tension support unit 100 , and a first tension receiving unit 101 . The first tension roller 98 is disposed below the first belt 96, abuts against the first belt 96, and imparts tension to the first belt 96. The first roller support piece 99 rotatably supports the first tension roller 98 at the front end portion. Further, the first roller support piece 99 is freely rotatable about the base end portion attached to the front frame threshing frame 23 by the first tension support portion 100. The first tension support portion 100 is for rotatably mounting the base end portion of the first roller support piece 99 on the threshing front frame 23. The first tension support portion 100 is detachably attached to the front threshing frame 23 by bolts 102 or the like. The first tension receiving portion 101 urges the first roller support piece 99 in the direction in which the first tension roller 98 approaches the first belt 96, and is attached to the right side surface of the screening portion 6. The first tension receiving portion 101 is provided with a base end portion and a screening portion 6 attached to the first roller supporting piece 99 in order to force the first roller supporting piece 99 in the direction in which the first tension roller 98 approaches the first belt 96. The tension coil spring 103 and the like. Further, the first tension applying unit 97 described above is a clutch of the threshing apparatus 10, and is connected to an operating device of a steering unit (not shown) by a wire or the like.

The second pulley 92 is rotationally driven by transmitting a driving force from the first pulley 91, and supplies a driving force to the threshing portion 7. The second pulley 92 is disposed above the first pulley 91 and coupled to the processing cylinder 73 of the threshing portion 7, and the processing cylinder 73 is rotationally driven by transmitting a driving force from the first pulley 91. The second pulley 92 includes a small-diameter pulley 92a and a large-diameter pulley 92b which are integrally provided coaxially. The small-diameter pulley 92a is disposed at a position offset from the large-diameter pulley 92b by the grain container 8, and is used on the front side of the front frame 23 of the threshing front frame. The support member 104 to which the plate member 26 is coupled is rotatably supported. A drive shaft 106 of the gear case 105 that connects the second pulley 92 and the processing cylinder 73 of the threshing unit 7 of the threshing apparatus 10 is attached to the second pulley 92.

A second belt 107 that connects the first pulley 91 and the second pulley 92 is placed on the large diameter pulley 92b of the second pulley 92 and the small diameter pulley 91a of the first pulley 91. Thus, the first belt 96 is placed at a position offset from the second belt 107 by the grain container 8. The second belt 107 applies tension by the second tension applying portion 108.

The second tension applying unit 108 includes a second tension roller 109 , a second roller support piece 110 , a rotation pin 111 , and a second tension receiving portion 112 . The second tension roller 109 is disposed behind the second belt 107, abuts against the second belt 107, and applies tension to the second belt 107. The second roller support piece 110 rotatably supports the second tension roller 109 at the front end portion. In addition, the second roller support piece 110 The center horizontal frame 21 is rotatably mounted around the rotation pin 111 provided at the center. The second tension receiving portion 112 urges the second roller support piece 110 in the direction in which the second tension roller 109 approaches the second belt 107, and is mounted on the center horizontal frame 21. The second tension receiving portion 112 is for urging the second roller support piece 110 in the direction in which the second tension roller 109 approaches the second belt 107, and as shown in FIG. 5, is provided at the base end of the second roller support piece 110. And a tension coil spring 113 on the central horizontal frame 21 and the like. In addition, the locus L (indicated by a chain line in FIG. 3) of the outer edge of the second tension roller 109 when the second roller support piece 110 is rotated about the rotation pin 111 is the axis of the rotation pin 111. When viewed in the direction, the trajectory where the outer edge of the inner liner type idler 123 to be described later does not overlap. In the present embodiment, the trajectory L is a trajectory that is lower than the outer edge of the inner liner type idler pulley 123 when viewed from the axial direction of the rotation pin 111.

The third pulley 93 is rotationally driven by transmitting a driving force from the second pulley 92, and supplies a driving force to the conveying device 56 of the harvesting device 5. The third pulley 93 is disposed above the first pulley 91 and below the second pulley 92, and is coupled to the conveying device 56 of the harvesting device 5, and drives the conveying device 56 by transmitting a driving force from the second pulley 92. A rotating shaft 114 coupled to the conveying device 56 of the harvesting device 5 is attached to the third pulley 93. The rotating shaft 114 is rotatably supported by a supporting metal member (first supporting member) 115 coupled to the plate member 26 on the front side of the threshing front frame 23. The rotation shaft 114 is rotatably supported on the support metal member 115, and the third pulley 93 is rotatably supported on the support metal member 115 provided in front of the threshing front frame 23.

A third belt 116 that connects the second pulley 92 and the third pulley 93 is placed on the small diameter pulley 92a and the third pulley 93 of the second pulley 92. Thus, the third belt 116 is placed at a position closer to the grain container 8 than the second belt 107. The third belt 116 is biased by the third tension applying portion 117.

The third tension applying unit 117 includes a third tension roller 118 , a third roller support piece 119 , a rotation pin 120 , and a third tension receiving portion 121 . The third tension roller 118 is disposed in front of the third belt 116 and abuts against the third belt 116 to apply tension to the third belt 116. The third roller support piece 119 rotatably supports the third tension roller 118 at the front end portion. Further, the third roller support piece 119 is rotatably attached to the gear case 105 around the rotation pin 120 provided at the center. The third tension receiving portion 121 urges the third roller support piece 119 in a direction in which the third tension roller 118 approaches the third belt 116, and is attached to the gear case 105. The third tension receiving portion 121 is provided with a tensile spiral attached to the third roller supporting piece 119 and the gear case 105 in order to force the third roller supporting piece 119 in the direction in which the third tension roller 118 approaches the third belt 116. Spring 122 and the like. Further, the third tension applying unit 117 is a clutch of the harvesting device 5, and is connected to an operating device of a steering unit (not shown) by a wire or the like.

Further, on the rotating shaft 114 of the third pulley 93, an inner idler type idler 123 as an idler is rotatably provided. The inner paddle idler 123 abuts against the second belt 107 and rotates with the rotation of the second belt 107. Further, as shown in FIG. 6, the inner liner type idler 123 is rotatably supported by the rotary shaft 114 by two bearings 124. The two bearings 124 are provided with an inner wheel, an outer wheel, and a plurality of rotatably disposed between the inner and outer wheels The rolling bearing of the rotating body is provided at both end portions of the inner-liner idler gear 123 in the direction of the rotating shaft 114. In the present embodiment, as shown in FIG. 6, the two bearings 124 are provided on the outer side in the direction of the rotation axis 114 than the bottom portion 125a of the outermost groove 125 of the inner liner type idler 123.

The combine harvester 1 configured as described above drives the traveling device 4 by the power generated by the engine 3, and harvests the grain stem by the harvesting device 5 while traveling. At this time, the harvesting device 5 separates the grain stems by the weeding body and smashes them into the auger frame 51 by the boring wheel 54, and harvests by the harvesting cutter 53. Then, the combine harvester 1 conveys the grain rod harvested by the harvesting device 5 to the processing chamber 71 of the threshing unit 7 of the threshing apparatus 10 by the conveyance device 56. Then, the combine harvester 1 rotates the processing cylinder 73 in the processing chamber 71 by the driving force transmitted from the engine 3 with the processing cylinder shaft 74 as a center of rotation and threshing the grain stem. The grain or the like after the threshing falls through the treatment net 76 to the screening chamber 61. Further, the combine harvester 1 screens the grain in the screening chamber 61 of the screening unit 6 by the blowing of the air blowing and the swaying and filtering unit 62, and stores the selected grain in the grain container 8. in.

Further, the power transmission device 9 of the combine harvester 1 configured as described above uses the driving force of the engine 3 to cause the first belt 96 to recirculate around the engine pulley 3a and the large-diameter pulley 91b of the first pulley 91, and to the first pulley. The large diameter pulley 91b of 91 is rotationally driven. Then, the drive shaft 95 rotates integrally with the first pulley 91 by the rotation of the large-diameter pulley 91b of the first pulley 91, and transmits the driving force of the engine 3 to the screening unit 6.

Further, the small-diameter pulley 91a and the large-diameter pulley 91b are integrally rotated by the rotation of the large-diameter pulley 91b of the first pulley 91, and the large diameter of the second belt 107 on the small-diameter pulley 91a and the second pulley 92 of the first pulley 91 The circumference of the pulley 92b is looped. Then, the large-diameter pulley 92b of the second pulley 92 is rotationally driven by the loop running of the second belt 107. Further, by the rotation of the large-diameter pulley 92b of the second pulley 92, the drive shaft 106 of the gear case 105 rotates integrally with the second pulley 92, and the driving force of the engine 3 is transmitted to the threshing portion 7.

Further, the small-diameter pulley 92a rotates integrally with the large-diameter pulley 92b by the rotation of the large-diameter pulley 92b of the second pulley 92, and the third belt 116 is returned around the small-diameter pulley 92a and the third pulley 93 of the second pulley 92. Walk in circles. Then, the third pulley 93 is rotationally driven by the loop running of the third belt 116. Further, by the rotation of the third pulley 93, the rotating shaft 114 rotates integrally with the third pulley 93, and the driving force of the engine 3 is transmitted to the harvesting device 5. In this way, the power transmission device 9 transmits the driving force of the engine 3 to the screening unit 6 of the threshing device 10, the threshing portion 7 of the threshing device 10, and the harvesting device 5.

Further, the rotating shaft 114 includes two sprocket wheels that drive the conveying mechanism 58 of the conveying device 56 and one sprocket that drives the harvesting portion 55. The transport mechanism 58 has two chains that are wound around the two sprocket wheels on the rear side and two driven sprocket wheels on the front side, and a plurality of transport plates that are mounted across the two chains. Further, a chain is wound around the sprocket, the sprocket that is driven by the harvesting cutter 53, and the sprocket that drives the auger 52 and the idler 54. That is, the driving force transmitted to the rotating shaft 114 is separately It is transmitted to the harvesting cutter 53, the auger 52 and the boring wheel 54. The other end of the drive shaft having a sprocket at one end is provided with a shifting mechanism. The shifting mechanism is a mechanism that converts the rotation transmitted to the propeller shaft into a reciprocating rotational motion and outputs it to the harvesting tool drive shaft. Further, the reciprocating rotational motion of the harvesting tool drive shaft drives the harvesting cutter 53 and the grass-harvesting cutter erected on the left side portion of the harvesting device 5 via an arm (not shown).

According to the combine harvester 1 of the embodiment described above, the first pulley 91, the second pulley 92, and the third pulley of the power transmission device 9 are provided only on the side surface of the front portion of the threshing apparatus 10 that faces the grain container 8. 93, therefore, it is not necessary to provide the first pulley 91, the second pulley 92, the third pulley 93, and the like on both sides of the threshing apparatus 10. Therefore, the belts 96, 107, and 116 that connect the pulleys 91, 92, and 93 to each other can be provided only on the side surface portion of the threshing apparatus 10 that faces the grain container 8, and the power transmission device 9 can be downsized and can be realized. The miniaturization of the combine harvester 1 itself is achieved. Further, the pulleys 91, 92, 93 constituting the power transmission device 9 and the belts 96, 107, 116 connecting the pulleys 91, 92, 93 to each other can be provided only on the side surface portion of the threshing apparatus 10 that faces the grain container 8. In other words, durability and maintenance can be improved compared to the case where these members are provided on both sides.

Further, according to the combine 1 of the embodiment, the second pulley 92 is disposed above the first pulley 91, and the third pulley 93 is disposed above the first pulley 91 and below the second pulley 92, so that it can be placed in the lead These pulleys 91, 92, 93 are arranged in the vertical direction. Therefore, it is possible to reliably suppress the expansion of the space occupied by the power transmission device 9, and it is possible to realize the movement. The miniaturization of the force transmission device 9 enables the size of the combine harvester 1 itself to be reduced.

Further, according to the combine harvester 1 of the embodiment, the first pulley 91 is disposed behind the threshing front frame 23, and the supporting metal member 115 that rotatably supports the third pulley 93 is disposed in front of the threshing front frame 23. Therefore, at least the first pulley 91 and the second pulley 92 can be disposed below the processing chamber guide frame 24, and these pulleys 91 and 92 can be disposed under the processing chamber guide frame 24 to be formed in the space K. Therefore, the distance between the engine 3 and the threshing device 7 can be shortened, and further reduction in size of the combine harvester 1 can be achieved.

Further, according to the combine harvester 1 of the embodiment, since the first pulley 91, the second pulley 92, and the third pulley 93 are provided in the space K formed between the front frame 23 and the grain container 8, the operation can be shortened. The distance between the seat 27 and the threshing apparatus 7 can further reduce the size of the combine harvester 1.

Further, according to the combine harvester 1 of the embodiment, since the first belt 96 is disposed at a position offset from the second belt 107 by the grain container 8, the first belt 96 can be removed after maintenance and the second belt is removed. Belt 107. Therefore, the number of times of loading and unloading of the belts 96 and 107 when the threshing apparatus 7 is attached and detached can be suppressed, and the maintainability can be improved.

Further, according to the combine harvester 1 of the embodiment, since the third belt 116 is disposed at a position offset from the second belt 107 by the grain container 8, the third belt 116 can be removed after maintenance and the second belt is removed. Belt 107. Therefore, the number of times of loading and unloading of the belts 107 and 116 when the harvesting device 5 is attached and detached can be suppressed. Improves maintenance.

Further, according to the combine harvester 1 of the embodiment, the front threshing frame 23 includes two plate members 26 that connect the vertical frames 25 and overlap each other in the front-rear direction, and the support member 94 and the supporting metal members 115 are coupled to the plate member 26 . Therefore, the mechanical strength of the front frame 23 after the threshing can be improved.

Further, according to the combine harvester 1 of the embodiment, the first roller support piece 99 that rotatably supports the first tension roller 98 at the distal end portion is attached to the pre-separation frame 23, so that the first roller support piece 99 can be improved. The rigidity of the first tension support portion 100 mounted on the threshing front frame 23 allows the first tension roller 98 to reliably apply tension to the first belt 96.

Further, according to the combine harvester 1 of the embodiment, the inclination and the displacement of the first tension roller 98 can be easily corrected by detaching the first tension support portion 100.

Further, according to the combine harvester 1 of the embodiment, since the first tension receiving portion 101 that urges the first roller supporting piece 99 is attached to the screening portion 6, the rigidity of the first tension receiving portion 101 can be improved, and the first The tension roller 98 can reliably apply tension to the first belt 96.

In the combine harvester 1 according to the embodiment, the rotation pin 111 constituting the rotation center of the second roller support piece 110 that rotatably supports the second tension roller 109 at the distal end portion is attached to the center of the side portion of the screening unit 6. In the horizontal frame 21, the rigidity of the portion where the second roller support piece 110 is attached to the center horizontal frame 21 can be improved, and the second tension roller 109 can reliably apply tension to the second belt 107.

In addition, according to the combine harvester 1 of the embodiment, since it will be the second The second tension receiving portion 112 that urges the roller supporting piece 110 is attached to the center horizontal frame 21 provided on the side portion of the screening portion 6, so that the rigidity of the second tension receiving portion 112 can be improved, and the second tension roller 109 can reliably The second belt 107 is given tension.

Further, in the combine harvester 1 according to the embodiment, the rotation pin 120 constituting the rotation center of the third roller support piece 119 that rotatably supports the third tension roller 118 at the distal end portion is attached to the gear case 105, so that the third tension is applied. The roller 118 can reliably apply tension to the third belt 116.

Further, according to the combine harvester 1 of the embodiment, since the third tension receiving portion 121 that urges the third roller supporting piece 119 is attached to the gear case 105, the rigidity of the third tension receiving portion 121 can be improved, and the third The tension roller 118 can reliably apply tension to the third belt 116.

Further, according to the combine harvester 1 of the embodiment, the idler pulley 123 that abuts against the second belt is provided on the rotating shaft 114 of the third pulley 93, so that the stretch margin of the second tension roller 109 can be secured.

Further, according to the combine 1 of the embodiment, since the idle gear 123 is the lining type idler 123, the second belt 107 can be driven even if it interferes with the lining idler 123.

Further, according to the combine 1 of the embodiment, the trajectory L of the second tension roller 109 when the second roller support piece 110 is rotated is a trajectory that does not overlap the lining idler 123, so that the maximum number of times can be ensured. The extension of the tension roller 109.

Further, according to the combine harvester 1 of the embodiment, the bearing 124 that rotatably supports the inner liner type idler 123 is provided in the inner liner type idler. Since both ends of the 123 shafts in the direction of the rotating shaft 114 are formed, the size of the bearing 124 can be reduced, and the cost can be reduced.

Further, the combine harvester according to the embodiment of the present invention described above is not limited to the above-described embodiment, and various modifications can be made within the scope of the claims.

3‧‧‧ engine

3a‧‧‧Engine Pulley

4‧‧‧Traveling device

5‧‧‧ Harvesting device

6‧‧‧Screening Department

9‧‧‧Power transmission device

10‧‧‧ threshing device

52‧‧‧Auger

53‧‧‧ Harvesting knives

54‧‧‧扒搂轮

55‧‧‧ Harvesting Department

56‧‧‧Transporting device

58‧‧‧Transportation agency

62‧‧‧Shake screening department

63‧‧‧Air supply and air separation machine

73‧‧‧Processing cylinder

74‧‧‧Processing cylinder shaft

81‧‧‧Draining auger

91‧‧‧First pulley (first rotating part)

91a‧‧‧ small diameter pulley

91b‧‧‧ Large diameter pulley

92‧‧‧Second pulley (second rotating part)

92a‧‧‧path pulley

92b‧‧‧ Large diameter pulley

93‧‧‧ Third pulley (third rotating part)

95‧‧‧ drive shaft

96‧‧‧First Belt

97‧‧‧First tension applying section

106‧‧‧ drive shaft

107‧‧‧Second belt

114‧‧‧Rotary axis

116‧‧‧ Third Belt

117‧‧‧ Third tension applying section

Claims (8)

A combine harvester comprising: a harvesting device (5) disposed at a front portion of the body frame; and a threshing device (10) disposed on the left and right sides of the grain container (8) and having a lower screening portion (6) and An upper threshing portion (7); a power transmission device (9) provided at a front portion of the threshing device (10), and transmitting a driving force of the engine (3) to the harvesting device (5) and the threshing device (10) And a pre-granulation frame (23) disposed forward of the threshing device (10) and formed to have a width narrower than the threshing device (10), the threshing front frame (23) being compared to the threshing device ( 10) The right end of the front portion is disposed on the left side; the combiner is characterized in that the power transmission device (9) includes a first rotating member (91) disposed behind the threshing front frame (23), and The driving force of the engine (3) is rotationally driven, and the driving force is supplied to the above-described screening portion (6); the second rotating member (92) is transmitted by the driving force from the first rotating member (91) Rotating drive, and supplying driving force to the above-mentioned threshing portion (7); third rotating member (93), utilizing from The driving force of the second rotating member (92) is rotationally driven, and the driving force is supplied to the harvesting device (5); and the first supporting member (115) is disposed on the front threshing frame (23) The third rotating member (93) is rotatably supported in front of the front. The combine harvester according to claim 1, wherein the second rotating member (92) is disposed above the first rotating member (91), and the driving force is transmitted from the first rotating member (91) to the above The processing cylinder (73) provided in the threshing unit (7) is rotationally driven; and the third rotating member (93) is disposed between the first rotating member (91) and the second rotating member (92) in the vertical direction, and is utilized. The transmission of the driving force from the second rotating member (92) drives the conveying device (56) provided in the harvesting device (5). The combine harvester according to claim 1, wherein the first rotating member (91) and the second rotation are disposed in a space (K) formed between the threshing front frame (23) and the grain container (8). Component (92) and third rotating component (93). A combine harvester according to claim 3, wherein the first belt (96) that interlocks the first rotating member (91) with the engine (3) is disposed in comparison with the second rotating member (92) The second belt (107) linked by the first rotating member (91) is biased against the portion of the grain container (8). A combine harvester according to claim 4, wherein the third belt (116) for interlocking the third rotating member (93) with the second rotating member (92) is disposed in comparison with the second belt (107) ) the part of the grain container (8). The combine harvester as recited in claim 5, wherein the above-mentioned threshing front frame The frame (23) is configured to arrange two plate members (26) at intervals in front and rear; a second support member (94) that rotatably supports the first rotating member (91) and the first support member (115) is coupled to the plate member (26). The combine harvester of claim 6, wherein the first tension roller (98) that imparts tension to the first belt (96) is supported at a front end portion of the first roller support sheet (99); the first roller The base end portion of the support piece (99) is rotatably attached to the above-described threshing front frame (23). The combine harvester according to claim 7, wherein the base end portion of the first roller support piece (99) is rotatably attached to the first tension support portion (100), and the first tension support portion (100) The detachable front frame (23) is detachably mounted.