JP2002144898A - Peripheral structure for transmission device for agricultural working vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To efficiently assemble an agricultural working vehicle by fixing independent plural HSTs 30, 31 to a transmission case in accurately specified relative arrangement without the need for position identification or position adjustment using a measuring tool. SOLUTION: This peripheral structure for a transmission device for the agricultural working vehicle comprises the transmission device 20 in which the plural HSTs 30, 31 in independent structures are each fixed to the transmission case 30a and a transmission belt 51 provided near the transmission device 20, wherein a supporting frame member 40 for supporting a tension imparting mechanism 56 for the transmission belt 51 consists of a joint member in an independent structure for joining the plural HSTs 30, 31 and specifying the relative positions of the HSTs on the transmission case 20a.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mission device peripheral structure such as an agricultural work vehicle equipped with a mission device having a plurality of HSTs.

[0002]

2. Description of the Related Art A plurality of hydrostatic transmissions (hereinafter, referred to as "HST") each having an independent structure are provided with a transmission device bolted to a transmission case, and a transmission belt is provided near the transmission device. There is a structure around a mission device of an agricultural work vehicle that is provided with a vehicle and other related members.
00-108708).

[0003] When a plurality of HSTs are fixed to the transmission case in the above-mentioned structure around the mission device of the agricultural work vehicle, or when a power transmission belt located near the HST or a member related thereto is assembled, each of these members is connected. It is necessary to fix it at a specific position accurately.

[0004]

The plurality of HSTs described above
When fixing the to the transmission case, it is necessary to check the position and adjust the position by using a measuring tool, which requires a lot of trouble. It also requires a lot of trouble in having to assemble it. This is a factor that increases the assembly time of the agricultural work vehicle. An object of the present invention is to provide a peripheral structure of a mission device such as an agricultural work vehicle which can solve such a problem with a simple structure.

[0005]

In order to achieve the above object, according to the present invention, a plurality of independent HSTs are provided with a transmission device fixed to a transmission case, and a transmission belt is provided near the transmission device. In a peripheral structure of a transmission device such as an agricultural work vehicle, a supporting frame member for supporting a tension applying mechanism of the transmission belt couples the plurality of HSTs and defines a relative position of these HSTs on a transmission case. And a connecting member having an independent structure.

According to the present invention, when a plurality of HSTs are fixed to the transmission case, a plurality of HSTs are assembled by assembling the support frame member together with the plurality of HSTs.
Is fixed to the mission case in an accurate specific relative arrangement state without using a position measuring tool.

According to the second aspect of the present invention, a plurality of independent HSTs are provided with a transmission device which is fixed to a transmission case with bolts, and an agricultural work vehicle having a transmission belt near the transmission device. In the peripheral structure of the transmission device, a supporting frame member for supporting the tension applying mechanism of the transmission belt has bolt holes through which the bolts are inserted, and couples the plurality of HSTs through the bolt holes. The HST is constituted by a connecting member having an independent structure for defining a relative position of the HST on the transmission case.

According to the present invention, the support frame member and the H
By inserting a bolt through the bolt hole of ST and screwing this bolt to the corresponding HST or a specific part of the transmission case, a plurality of HSTs can be accurately specified relative to the transmission case without using a position measuring tool. It is fixed in a state.

According to the third aspect of the present invention, a plurality of HSTs each having an independent structure are provided with a transmission device fixed to a transmission case, and input shafts of the respective HSTs are interlocked and connected by a transmission belt. In a peripheral structure of a transmission device such as an agricultural work vehicle, a support frame member for supporting a tension applying mechanism of the transmission belt couples the plurality of HSTs and defines a relative position of the HSTs on a transmission case. And a connecting member having an independent structure.

According to the present invention, when a plurality of HSTs are fixed to the transmission case, the support frame member is assembled together with the plurality of HSTs, so that a plurality of HSTs are provided.
And the tensioning mechanism is fixed to the transmission case in a precise specific relative arrangement without using a position measuring tool, and the transmission belt for interlocking the input shaft of each HST can be easily and accurately assembled. Becomes

According to the fourth aspect of the present invention, a plurality of HSTs each having an independent structure are provided with a transmission device which is fixed to a transmission case by bolts, and the input shafts of the respective HSTs are interlocked by a transmission belt. In a peripheral structure of a transmission device such as an agricultural work vehicle connected, a support frame member that supports a tension applying mechanism of the transmission belt couples the plurality of HSTs and determines a relative position of these HSTs on a transmission case. In addition to a coupling member having an independent structure as defined, a cover for the power transmission belt or a mounting seat for the cover is provided.

According to the present invention, in addition to obtaining the same operation as that of the third aspect, the cover cover and the mounting seat of the cover can be formed without the need for independent fixing processing or position adjustment processing. And the transmission belt is fixed in an accurate specific relative arrangement state.

According to the fifth aspect of the present invention, a plurality of HSTs each having an independent structure are provided with a transmission device fixed to a transmission case by bolts, and the input shafts of the respective HSTs are interlocked by a transmission belt. In a peripheral structure of a transmission device such as an agricultural work vehicle connected, a support frame member that supports a tension applying mechanism of the transmission belt couples the plurality of HSTs and determines a relative position of these HSTs on a transmission case. In addition to the coupling member having an independent structure to be defined, a belt retainer for the transmission belt or a mounting seat for the retainer is provided.

According to the present invention, in addition to obtaining the same operation as that of the third aspect, the belt retainer and the mounting seat for the belt retainer do not require any independent fixing process or position adjusting process. The belt is fixed in an accurate specific relative arrangement state with respect to the transmission belt.

According to a sixth aspect of the present invention, a plurality of HSTs each having an independent structure are provided with a transmission device which is fixed to a transmission case by bolts, and a transmission side transmission belt is provided between input shafts of the respective HSTs. In addition to the interlocking connection, the output shaft of the prime mover and the input shaft of an optional HST are linked with the transmission belt of the prime mover in a peripheral structure of a transmission device such as an agricultural work vehicle. A supporting frame member to be supported connects the plurality of HSTs and defines a relative position of the HSTs on a transmission case. In addition to a connecting member having an independent structure, a tensioning mechanism of a tension applying mechanism of a power transmission belt is provided. The configuration includes a spring support member for supporting the spring.

According to the present invention, in addition to obtaining the same operation as that of the third aspect, the spring supporting member does not require these independent fixing processing or position adjusting processing, and the driving power transmission belt is not required. Is fixed in an accurate specific relative arrangement state.

According to the present invention, a plurality of HSTs each having an independent structure are provided with a transmission device fixed to a transmission case, a transmission belt is provided near the transmission device, and a transmission belt is provided above the transmission device. In a peripheral structure of a transmission device such as an agricultural work vehicle having a side column, a support frame member for supporting a tension applying mechanism of the power transmission belt connects the plurality of HSTs to each other, and
In addition to the connecting member having an independent structure for defining the relative position of the side column, a receiving member having a frame structure of the side column is provided.

According to the present invention, in addition to the same effect as that described in the third aspect, the receiving member having the frame structure of the side column also requires a single fixing process and a position adjusting process. Therefore, it is fixed in an accurate specific relative arrangement state with respect to the mission device.

Each of the above-mentioned inventions is embodied as follows, that is, as described in claim 8, the connecting member is bolted to each HST at at least two places. According to this, each HST and the support frame member are firmly connected, so that when the HST is fixed to the transmission case, the relative positions of the plurality of HSTs are more stably held. After the HST is fixed to the transmission case, the supporting frame member is firmly supported by the transmission device.

Further, as described in claim 9, the connecting member is bolted to each HST at at least two places, one of which is connected by a lateral bolt,
The other part is configured to be connected by a vertical bolt. According to this, each HST and the support frame member are more firmly connected by the horizontal bolt and the vertical bolt.

[0021]

1 to 12 relate to a combine having a transmission device peripheral structure according to the present invention. FIG. 1 is a right side view of the combine, FIG. 2 is a plan view of the combine, and FIG. 4 is a right side view of the upper portion of the transmission device, FIG. 4 is a front view of the transmission device, etc., FIG. 5 is a rear view of the transmission device, etc., FIG. 6 is a right side view of the transmission device, etc., and FIG. FIG. 8, FIG. 8 is a plan view of a mission device and the like, FIG. 9 is an explanatory diagram showing an exploded state around the HST of the mission device, FIG. 10 is an explanatory diagram showing an exploded state of a left transmission case portion of the mission device,
FIG. 11 is an explanatory view showing a state where a right transmission case portion and the like of the mission apparatus are disassembled, and FIG. 12 is an explanatory view showing a state where an oil passage line of the transmission apparatus is removed.

In FIGS. 1 and 2, reference numerals 1 and 1 denote a pair of left and right crawler traveling devices, and reference numeral 2 denotes a machine base supported by the crawler traveling devices 1 and 1. 3 is machine base 2
The cutting section 3 is provided at the front of the machine base 2 with a cutting frame 4 supported at the front of the machine base 2 via a horizontal fulcrum shaft (not shown) so as to be able to move up and down. A telescopic cylinder device (not shown) for raising and lowering around the axis is provided. A weeding plate 5 is fixed to the foremost part of the cutting frame 4, and a raised case 6 and a cutting blade 7 are fixed to a portion of the cutting frame 4 behind the weeding plate 5.

Reference numeral 8 denotes a control unit provided on the right side of the foremost part above the machine base 2. Behind the control unit 8, a grain tank 9 is provided.
On the left side of the control section 8 and the grain tank 9, a grain culm transport section 10 and a threshing section 11 are provided. This threshing unit 1
1 is provided with a feed chain 12, a handling cylinder 13, and a processing cylinder 14. Then, the threshing unit 11 and the grain tank 9 are connected via a fryer cylinder 15.

Numeral 16 denotes a straw processing unit provided in the form of an overhang to the rear of the machine base 2, which cuts the straw from a straw transport chain 17 extending obliquely rearward from the back of the handling cylinder 13. And a processing main part 18.

Reference numeral 19 denotes a prime mover provided below the rear part of the control unit 8. Reference numeral 20 denotes a mission device fixed to the front of the machine base 2, and the mission device 20 is linked to the prime mover 19. Reference numeral 21 denotes a grain discharge auger for discharging the grains in the grain tank 9 to the outside.

The combine constructed as described above operates as follows. That is, the rotation of the prime mover 19 is input to the mission device 20, and subsequently transmitted from the mission device 20 to the crawler traveling devices 1, 1, whereby the crawler traveling devices 1, 1 are driven to cause the machine to travel. While the machine is running, the weeding plate 5 is used to squeeze the entanglement between the adjacent streaks of the cultivated culm, the cutting blade 7 cuts the culm caused by the raising device 6, and the cereal culm transport device 10 cuts. Threshing unit 9
The threshing unit 9 threshes this, and the obtained grain is sent to the grain tank 9 by the fryer cylinder 15, while the straw is discharged by the straw chain 17 to the main processing unit 18. Transport,
The processing section 18 cuts the straw and discharges it outside the machine.

Next, the operation unit 8 will be described. A box-shaped seat column 22 that covers the prime mover 19 is provided on the machine base 2 at the rear of the control unit 8, and a driver's seat 23 is provided on the upper surface of the seat column 22. A step surface 24 is formed between the front surface i of the seat column 22 and the front edge j of the steering section, and a steering column 26 having a round steering handle 25 is provided at the front of the steering section 8. Let me do it.

A side column 27 is formed on the machine base 2 on the left side of the control unit 8, and a plurality of lever grooves are provided on the upper surface of the side column 27. Main shift operation lever 28 toward
And the auxiliary transmission operation lever 29 and the like are raised.

Next, the mission device 20 will be described. As shown in FIG. 3, a transmission case 20a is provided.
With four bolts a1, a2, a3, and a4, and the turning HST 31 of the independent structure with four bolts b1, b2, and b.
3, fixed at b4. The transmission case 20a is fixed to the machine base 2, and as shown in FIGS. 4, 10 and 11, a right transmission case portion c2 is provided on a right side surface of the central transmission case portion c1 via a bolt d.
And a left transmission case portion c3 is fixed to the left side surface via a bolt e.

The central transmission case portion c1 is formed as follows, that is, HST fixing seats 202 and 201 are formed at front and rear portions of an upper right side as shown in FIG. 9, and as shown in FIG. A protruding disassembly seat c11 having a length of about several centimeters at a position away from the contact surface c10 with the right transmission case part c2 to the left at, for example, about 10 mm at a lower outer end of the front end face is formed in a vertical shape. And from the contact surface c12 with the left transmission case portion c3 to the right at an outer surface location at the center of the height of the front end face, for example, approximately 10
mm, a protruding disassembly seat c1 similar to
8 is formed integrally in the vertical direction, and as shown in FIG. A protruding disassembly seat c14 is integrally formed in a vertical shape. Further, a cylindrical oil supply port c for replenishing hydraulic oil into the transmission case 20a is provided at a front portion of the upper end surface.
15 is formed integrally, and a through hole c16 (see FIG. 10) through which a left traveling drive shaft 32a is interlockedly connected to the left crawler traveling device 1 is formed on the lower left side surface, and a left traveling drive shaft as shown in FIG. An attachment seat c17 for fixing the shaft case 33a that covers the shaft 32a is formed.

The right transmission case part c2 is constructed as follows, that is, as shown in FIGS. 4 to 7, from the contact surface c21 with the central transmission case part c1 at the lower part of the front and rear end faces. Protruding disassembly seats c22 and c23 each having a length of about several centimeters are formed integrally with each other at a position approximately 10 mm apart to the right, for example, in a vertical direction, and the right crawler traveling device 1 is provided on the lower right side. A through hole c24 (FIG. 1) through which the right traveling drive shaft 32b is linked
1), and a mounting seat c25 for fixing a shaft case 33b for covering the right traveling drive shaft 32b. At this time, the disassembly seat c22 is disposed so as to face the disassembly seat c11.

The left transmission case portion c3 is constructed as follows, ie, as shown in FIGS. 4 to 8, the outer transmission portions at the upper and lower ends of the front and rear end surfaces are brought into contact with the central transmission case portion c1. To the left from plane c31, for example, about 10m
Protruding disassembly seats c32, c33, c34, c3 each having a length of about several cm at four places separated by about m
5 are integrally formed in a vertical orientation, and the disassembly seat c3
2 is opposed to the cylindrical oil supply port c15,
33 is opposed to the disassembly seat c13, and the disassembly seat c3
4 is opposed to the disassembly seat c14, and the disassembly seat c35
Is opposed to the outer side surface of the central transmission case part c1.

Each of the HSTs 30, 31 has a hydraulic pump having input shafts 34a, 34b and a hydraulic motor having output shafts 35a, 35b as shown in FIG. Is rotated by the pressure oil sent from the hydraulic pump, and this rotation is output,
Further, the swash plate has a rotary swash plate (not shown) which is operated from the outside, and the amount and direction of oil supply of the hydraulic motor are changed by the tilt displacement of the rotary swash plate, so that the output shafts 35a, 35
The rotation speed of b is changed steplessly, and the rotation direction is arbitrarily changed.

Then, as shown in FIG. 4 and FIG.
At the hydraulic motor side portions of T30 and T31, circular fitting portions 30a and 31 concentric with the output shafts 35a and 35b of the hydraulic motor.
a, the fitting portions 30a and 31a are formed at specific positions of the mounting seats 201 and 202, and the circular fitting portions 3a and 31a
The output shafts 35a and 35b are accurately positioned at specific positions by fitting these circular fitting portions (not shown) having a male and female relationship with 0a and 31a. . Note that these circular fitting portions are
It is not intended to strictly restrict the displacement of the hydraulic motors 30 and 31 around the output shafts 35a and 35b of the hydraulic motor.

As shown in FIGS. 3 and 8, a hydraulic oil charge pipe 36 is mounted on the upper part of the transmission case 20a, and a hydraulic oil suction line 37 is provided on the front end face of the central transmission case portion c1. Is installed. The charge pipe 36 connects the discharge-side hydraulic oil system of the hydraulic pump of the straight HST 30 and the discharge-side hydraulic oil system of the hydraulic pump of the turning HST 31 to supply hydraulic oil to the hydraulic oil systems of the HSTs 30 and 31. And made of metal. Then, the suction line 37 supplies the hydraulic oil at the hydraulic oil pool in the transmission case 20a to the HST for straight traveling.
30 and a hydraulic pump 38 fixed to the hydraulic pump 38, and a portion formed by a metal pipe 39a and a metal coupling portion 39b as shown in FIG. The upper end of the metal tube 39a and the hydraulic pump 3
8 and a rubber tube portion 40 for coupling the same.

As shown in FIG. 1, a connecting member 40 for integrally connecting the HSTs 30 and 31 to each other is mounted on the upper portion of the transmission case 20a.
This connecting member 40 is specifically configured as follows. That is, as shown in FIGS. 3 to 9, a main plate member 40a is provided which has a hook-shaped cross section and is arranged right above the mission frame 20a so as to face forward and backward. The main plate member 40a is formed with a vertical bolt hole g1 shown in FIG. 9 at a specific location at the front of the horizontal plane, and has a hook-shaped cross section at a specific location on the vertical surface behind the bolt g1. The front vertical member 41 is fixed to form a left-right bolt hole g2 at a specific location at the tip of the vertical member 41, and the front vertical member 41 is formed at a horizontal plane portion.
A right-and-left member 42 having a U-shaped cross section is fixed to the rear of the left and right sides, and a vertical bolt hole g3 is formed at a specific location at the tip of the left-right member 42 and a cylindrical member having a specific length. 43 is fixed in the vertical direction concentric with the bolt hole g3 at the bolt hole g3 of the left-right member 42, and an elongated plate member 44 is obliquely lowered downward at the rear end of the horizontal surface along the front-rear vertical plane. The plate member 44 is fixed in a protruding state, and a left or right bolt hole g4 is formed at a specific location at the tip of the plate member 44.

At this time, the bolt hole g1 in the horizontal plane portion is inserted into the screw hole g1 of the turning HST31 by inserting the bolt h1 inserted therethrough.
0, the screw hole g10 is fixed to the opening of the screw hole g10 by being screwed vertically, and the bolt hole g2 of the front vertical member 41 is connected to the bolt hole g2, the bolt hole g20 of the turning HST 31 and the central transmission case portion c1. The bolt b4 inserted laterally into the bolt hole g21 is inserted into the left transmission case c3.
The screw hole g20 is fixed to the outer opening of the screw hole g20 by screwing into the screw hole. On the other hand, the bolt hole g3 of the left-right facing member 42
The bolt h2 inserted vertically into the bolt hole g3 and the inner hole of the cylindrical member 43 is inserted into the screw hole g30 of the HST 30 for straight traveling.
Screwed into the screw hole g30 opening,
The bolt hole g4 of the plate member 44 is inserted into the bolt hole g4, the bolt hole g40 of the straight traveling HST 30, and the bolt hole g41 of the central transmission case portion c1 by inserting the bolt a4 into the screw hole of the left transmission case portion c3. By screwing, it is fixed to the outside opening of the screw hole g40.

As described above, the connecting member 40 is
The fact that the bolts 0 and 31 are bolted at two places contributes to stably fixing the relative position between the coupling member 40 and each of the HSTs 30 and 31,
One of the fixed portions 0 and 31 is a lateral bolt a
4 and b4, and the other is a vertical bolt h
1, h2 indicates that the connecting member 40 and each HS
This contributes to more strictly fixing the relative position with respect to T30 and T31. In the above specific example, each HST3
Although 0 and 31 were fixedly connected to the connecting member 40 at two places,
Further, it may be possible to fix and fix at many places.

Next, a power transmission mechanism from the prime mover 19 to a required portion of the transmission 20 will be described. As shown in FIGS. 1 and 2, the output shaft 19a of the prime mover 19 and the input shaft 34a of the hydraulic pump of the straight-forward HST 30 of the transmission device 20 are operatively connected via a belt transmission mechanism j0. The belt transmission mechanism j0 includes a pulley 41 fixed to the output shaft 19a and a double pulley 4 fixed to the input shaft 34a.
Endless power transmission belt 4 on one of the pulleys 2
3, a tension applying mechanism 44 for applying an appropriate tension to the transmission belt 43 is provided.

The tension applying mechanism 44 is constructed as follows, ie, as shown in FIGS. 1 and 3, the hook-shaped arm 45 is turned right and left on This hook-shaped arm 4 is attached so that it can swing around the axis.
5, a tension roller 46 for pressing and tensioning the prime mover-side transmission belt 43 is attached to one end, and one end of a tension spring 47 is connected to the other end.
Is connected to an upper part of a spring support member 48 fixed to the upper surface of the main member 40a of the connecting member 40 in an upright manner via an adjusting member 49 shown in FIG.

The transmission of power to the input shaft 34b of the hydraulic pump of the turning HST 31 is performed from the double pulley 42 of the straight HST 30 via the belt transmission mechanism j1, and the belt transmission mechanism j1 is used. Is as follows. That is, the pulley 50 is fixed to the input shaft 34b of the hydraulic pump of the turning HST 31 and the transmission-side transmission belt 51 is wound around the pulley 50 and the other pulley of the double pulley 42 as shown in FIG. In addition, a tension applying mechanism 52 for applying an appropriate tension to the transmission belt 51 is provided. At this time, a support frame member for supporting the tension applying mechanism 52 needs to be provided in the same shape as the machine base 2 and the transmission device 20, and the like. It functions as this support frame member.

The tension applying mechanism 52 is configured as follows: as shown in FIG. 3, a fulcrum is provided on the vertical surface of the main plate 40a of the coupling member 40 so as to project rightward. The shaft 53 is fixed.
A hook-shaped arm 54 is swingably mounted in the direction along the vertical plane facing the front and rear, and a tension roller 55 for pressing and tensioning the transmission belt 51 on one end of the hook-shaped arm 54 is provided at one end of the hook-shaped arm 54. One end of a tension spring 56 is coupled to the other end, and the other end of the spring 56 is coupled to the upper part of the spring support member 48 via a member 57 whose length can be adjusted.

The belt transmission mechanisms j0 and j1 are changed as necessary.
The belt holding member 51 (not shown) is
In this case, for example, a belt holder may be directly fixed to the support frame member 40, or an attachment seat for detachably fixing the belt holder may be provided.

A cover 58 for covering a part of the transmission belt 51 and a portion of the pulley 50 is disposed in the vicinity of the transmission belt 51 and in front of the pulley 50. It is detachably bolted via a mounting seat 59 (see FIG. 4 and the like) fixed vertically to the front end of 40a. This cover 5
Numeral 8 contributes to protecting workers approaching the vicinity of the mowing part 3 and preventing the culm from being involved. The cover 58 may be directly fixed to the support frame member 40.

Referring further to the side column 27 and its related structure, as shown in FIGS. 1 and 2, the side column 27 has a surface plate 27a covering the outer periphery and the surface plate 27a.
And a frame structure 60 for supporting the transmission device 20. The frame structure 60 is formed by connecting a vertical bar member and a horizontal bar member. It is located directly above. The frame structure 60
In order to firmly fix the main plate member 40a, it is preferable to support the lower part of the main frame member 40a on the upper surface side part of the length of the main plate member 40a as shown in FIG. A mounting seat 61 for a frame structure 60 is provided, and the mounting seat 61 and a lower portion of the frame structure 60 are connected by bolts 62. The left and right shaft 63 (see FIG. 9 and the like) fixed to the spring support member 48 supports the operation mechanism member in the side column 27.

The rectilinear operation and the turning operation of the combine are performed in the same manner as in the combine disclosed in Japanese Patent Application Laid-Open No. 2000-108708, that is, the main shift operating lever 28 is pivoted back and forth from its neutral position. by doing,
The swash plate of the hydraulic pump of the straight HST 30 is tilted and displaced,
The displacement changes the rotation speed and rotation direction of the output shaft 35a of the hydraulic motor, and the rotation of the output shaft 35a is transmitted to the left and right crawler traveling devices 1 and 1 via a transmission mechanism in the transmission case 20a, and the circular operation is performed. Under the condition that the steering handle 25 is held in the neutral position, the left and right crawler operating devices 1
1 is rotated at the same speed in the same direction, and the aircraft is moved straight forward or backward in one of the front and rear directions or stopped.

By rotating the round steering wheel 25 from the neutral position to the left or right, the turning HST 31 is turned.
The swash plate of the hydraulic pump is tilted and displaced, and the displacement changes the rotation speed and the rotation direction of the output shaft 35b of the hydraulic motor.
A rotation difference related to the operation direction and operation angle of the round steering wheel 25 is generated in the left and right crawler traveling devices 1 and 1 via the internal transmission mechanism, and the left and right corresponding to the operation of the round steering wheel 25 are generated. It turns at a specific radius toward the side.

Therefore, when the main transmission operation lever 28 is swung back and forth from the neutral position, the round steering handle 2
When the vehicle 5 is swung left and right from the neutral position, the aircraft is turned while traveling forward or backward.

In the above combine, the mission device 2
In order to assemble the peripheral structure, for example, first, the transmission case 20a is assembled, and then the HST 30 for straight traveling is assembled.
And the turning HST 31 with the corresponding mounting seats 201, 20.
2 is assembled in a state in which the fitting portions 30a and 31a are fitted and in a state where it is slightly movable. At this time, each of the HSTs 30 and 31 includes three bolts a1 to a3 and b1 to b3.
3 and temporarily fixed to the mounting seats 201 and 202, and then one bolt a4 and b4 corresponding to each of the HSTs 30 and 31 is inserted into the corresponding bolt holes g2 and g4 of the coupling member 40 and assembled. On the other hand, the other single bolts h1 and h2 corresponding to the respective HSTs 30 and 31 are inserted into the corresponding bolt holes g1 and g3 of the connecting member 40, and the corresponding H
Screw it into the screw holes g10 and g30 in ST30 and ST31. Thereafter, the bolts are tightened evenly by tightening the bolts in an appropriate order and in an appropriate amount.

As a result, the two HSTs 30 and 31 are accurately fixed at a predetermined specific position only by tightening the bolt without performing position confirmation or position adjustment using a measuring tool. Further, the HSTs 30 and 31, a coupling member (support frame member) 40, belt transmission mechanisms j0 and j1, tension applying mechanisms 44 and 52, and a spring support member 4
8. The cover 58 of the power transmission belt 51, the belt retainer (not shown), and the like can be easily and quickly fixed to a specific relative arrangement state without performing position confirmation or position adjustment using a measuring tool.

When disassembling the mission device 20,
For example, first, the bolts connecting the central transmission case portion c1, the right transmission case portion c2, and the left transmission case portion c3 are removed, and then the disassembled seats c11 and c
12, between c13 and c33, between c14 and c34,
Between the transmission case parts c1, c2, and c3, a rod member such as a driver is inserted between the transmission case parts 23, c32, and c35 and the opposing transmission case 20a to incline or apply an impact to the disassembly seat with a hammer or the like. Are separated from each other. Each of the disassembly seats is also used as a chucking seat for a chuck device to grip the transmission case portions c1, c2, and c3 when machining them.

In the above embodiment, the mission device 20
Described the one having two HSTs 30, 31, but the present invention is not limited to this.
The mission apparatus 20 may have three or more HSTs. Further, the peripheral structure of the mission device according to the present invention is not limited to the agricultural work vehicle, but may be applied to other mechanical structures including the mission device. Further, the belt transmission is not limited to the belt transmission mechanisms j0 and j1 of the embodiment, and may be arbitrarily implemented in connection with a belt transmission for another use existing near the transmission device.

[0053]

According to the present invention, the following effects can be obtained. That is, according to the first aspect of the present invention, a plurality of independent HSTs can be measured by the support frame member for supporting the tension imparting mechanism of the transmission belt by specifying the relative positions of the plurality of HSTs. It can be quickly fixed to the mission case in an accurate specific relative arrangement state without requiring position confirmation and position adjustment by use, and the tensioning mechanism can be positioned accurately and quickly without using a position measuring tool. And a support frame member acting to support the tension applying mechanism, and a coupling for coupling a plurality of HSTs, which contributes to the efficiency of assembling the peripheral structure of the transmission device and eventually assembling the agricultural work vehicle. The common use with the member is achieved, so that the structure is not complicated.

According to the second aspect of the present invention, the following effects can be obtained in addition to the effects of the first aspect of the present invention, namely, the support frame member and the bolt holes of the HST, and By passing through the inserted bolt,
A plurality of independent HSTs can be fixed to a mission case in a precise specific relative arrangement state by simple processing without requiring position confirmation or position adjustment by using a measuring tool.

According to the third aspect of the invention, the following effect can be obtained in addition to the effect of the first aspect of the invention, that is, the input shafts of the respective HSTs are interlocked. The transmission belt can be assembled to the transmission case in an accurate specific relative arrangement without the need for position confirmation and position adjustment by using a measuring tool. It is possible to fix the transmission belt in an accurate and fixed relative arrangement state without requiring confirmation or position adjustment.

According to the fourth aspect of the present invention, the following effect can be obtained in addition to the effect of the third aspect of the invention, that is, the input shafts of the respective HSTs are interlocked. The cover for the power transmission belt and the mounting seat for the cover can also be fixed to the power transmission belt in an accurate specific relative arrangement state without the need for such independent fixing processing and position adjustment processing.

According to the fifth aspect of the present invention, the following effect can be obtained in addition to the effect of the third aspect of the invention, that is, the input shafts of the respective HSTs are interlocked. The belt retainer of the power transmission belt and the mounting seat for the power transmission belt can also be fixed to the power transmission belt in an accurate specific relative arrangement state without the need for such independent fixing processing and position adjustment processing.

According to the sixth aspect of the invention, the following effect can be obtained in addition to the effect of the third aspect of the invention. That is, the tension spring of the tension applying mechanism of the power transmission side transmission belt is used. The spring support member for supporting can also be fixed to the prime mover-side transmission belt in an accurate specific relative arrangement state without the need for such independent fixing processing and position adjustment processing.

According to the seventh aspect of the present invention, the following effects can be obtained in addition to the effects of the first aspect of the present invention. It is possible to fix the transmission device to a transmission device or the like in an accurate specific relative arrangement state without the need for a single fixing process or a position adjustment process, thereby contributing to an efficient assembly of the side column skeleton structure.

According to the eighth aspect of the present invention, when a plurality of HSTs are fixed to the transmission case, a plurality of HSTs are connected to the connecting member of each HST at two locations.
In addition to being able to more stably maintain the relative position of
In a state where the HST is fixed to the transmission case, the support frame member composed of the coupling member can be firmly supported by the transmission device.

According to the ninth aspect of the present invention, the effect of the eighth aspect can be further improved by the vertical and horizontal bolts.

[Brief description of the drawings]

FIG. 1 is a right side view of a combine provided with a mission device peripheral structure according to the present invention.

FIG. 2 is a plan view of the combine.

FIG. 3 is a right side view of the vicinity of an upper portion of a transmission device of the combine.

FIG. 4 is a front view of the mission device and the like.

FIG. 5 is a rear view of the transmission device and the like.

FIG. 6 is a right side view of the transmission device and the like.

FIG. 7 is a left side view of the mission device and the like.

FIG. 8 is a plan view of the mission device and the like.

FIG. 9 is an explanatory view showing a disassembled state around the HST of the mission device.

FIG. 10 is an explanatory view showing a state where a left transmission case portion of the transmission device is disassembled.

FIG. 11 is an explanatory view showing a state where a right transmission case portion and the like of the transmission device are disassembled.

FIG. 12 is an explanatory diagram of a state where an oil passage line of the transmission device is removed.

[Explanation of symbols]

 Reference Signs List 19 motor 19a output shaft 20 transmission device 20a transmission case 27 side column 30 HST 31 HST 34a input shaft 34b input shaft 40 support frame member (coupling member) 43 motor-side transmission belt 44 tension applying mechanism 47 tension spring 51 transmission-side transmission belt 56 Tension applying mechanism 58 Covering cover 59 Mounting seat 60 Frame structure 61 Receiving member a1 Bolt a2 Bolt a3 Bolt a4 Bolt g1 Bolt hole g2 Bolt hole g3 Bolt hole g4 Bolt hole h1 Bolt h2 Bolt

 ──────────────────────────────────────────────────続 き Continuing on the front page F term (reference) 2B076 AA03 BA03 DA02 DA15 DB02 3D042 AB11 BA02 BB00 3J049 AA01 BB05 BB10 BB14 BC03 CA07 3J063 AA13 AB01 AB22 AB44 AC03 BA01 BA03 BA04 BA05 BB12 BB27 BB46 CA01 CB21 CD53

Claims (9)

[Claims] In a peripheral structure of a transmission device such as an agricultural work vehicle having a transmission device provided with a transmission device in which a plurality of HSTs each having an independent structure are fixed to a transmission case and having a transmission belt near the transmission device,
A support frame member supporting the tension imparting mechanism of the transmission belt is formed of a connecting member having an independent structure connecting the plurality of HSTs and defining a relative position of the HSTs on a transmission case. Mission device peripheral structure such as agricultural work vehicles characterized by the following. 2. A peripheral structure of a transmission device such as an agricultural work vehicle having a transmission device provided with a transmission device in which a plurality of HSTs each having an independent structure are fixed to a transmission case by bolts and having a transmission belt near the transmission device. A support frame member for supporting the tension imparting mechanism of the transmission belt has bolt holes through which the bolts are inserted, and couples the plurality of HSTs through the bolt holes to form the HST on the transmission case.
A peripheral structure of a mission device such as an agricultural work vehicle, comprising a connecting member having an independent structure for defining a relative position of the ST. 3. An agricultural work vehicle or the like in which a plurality of HSTs each having an independent structure are provided with a transmission device which is fixed to a transmission case by bolts, and input shafts of the respective HSTs are interlocked and connected by a transmission belt. In the transmission device peripheral structure, an independent structure in which a support frame member for supporting the transmission belt tension applying mechanism connects the plurality of HSTs and defines a relative position of these HSTs on a transmission case. A peripheral structure of a mission device for an agricultural work vehicle or the like, comprising: a connecting member. 4. An agricultural work vehicle or the like in which a plurality of HSTs each having an independent structure are provided with a transmission device which is fixed to a transmission case by bolts, and input shafts of the respective HSTs are connected to each other by a transmission belt. In the transmission device peripheral structure, an independent structure in which a support frame member for supporting the transmission belt tension applying mechanism connects the plurality of HSTs and defines a relative position of these HSTs on a transmission case. And a cover for the power transmission belt or a mounting seat for the cover in addition to the connecting member described above. 5. An agricultural work vehicle or the like in which a plurality of HSTs each having an independent structure are provided with a transmission device which is fixed to a transmission case by bolts, and input shafts of the respective HSTs are linked to each other by a transmission belt. In the transmission device peripheral structure, an independent structure in which a support frame member for supporting the transmission belt tension applying mechanism connects the plurality of HSTs and defines a relative position of these HSTs on a transmission case. A peripheral device for a transmission device such as an agricultural work vehicle, comprising a belt retainer for the power transmission belt or a mounting seat for the retainer, in addition to the coupling member described above. 6. A transmission device in which a plurality of independent HSTs are fixed to a transmission case with bolts to a transmission case, and input shafts of the respective HSTs are interlocked to each other by a transmission-side transmission belt. In a peripheral structure of a transmission device such as an agricultural work vehicle in which the output shaft of the HST and an input shaft of an arbitrary HST are interlocked with a power transmission belt, a supporting frame for supporting a tension applying mechanism of the transmission belt. A member couples the plurality of HSTs and the HSTs on the transmission case.
Agricultural work vehicles, etc., characterized by being provided with a spring supporting member for supporting a tension spring of a tension applying mechanism of the prime mover side transmission belt, in addition to an independent structure coupling member that defines the relative position of Mission equipment peripheral structure. 7. A transmission device comprising: a plurality of independent HSTs each having a transmission device fixed to a transmission case; and a transmission belt near the transmission device.
In a peripheral structure of the transmission device such as an agricultural work vehicle having a side column above the transmission device, a support frame member for supporting a tension applying mechanism of the power transmission belt connects the plurality of HSTs to a transmission case. A peripheral structure of a mission device such as an agricultural work vehicle, comprising a coupling member having an independent structure for defining the relative positions of the above HSTs and a receiving member having a frame structure of the side column. 8. The HST according to claim 1, wherein at least two bolts are connected to each HST.
The peripheral structure of a mission device such as an agricultural work vehicle according to any one of the above. 9. The connecting member is bolted to each HST in at least two places, one of which is connected by a lateral bolt and the other is connected by a vertical bolt. A peripheral structure of a mission device such as an agricultural work vehicle according to any one of claims 1 to 6.