CN115245091A - Combine harvester - Google Patents

Abstract

A combine harvester. Conventionally, since a seal member is provided in an operation groove of a main shift lever, deterioration of the seal member due to lever operation, abrasion or damage of the seal member, and protection of an internal mechanism may not be prevented. The combine harvester comprises: a traveling device, a harvesting device and a threshing device which are driven by the rotation of an engine are respectively arranged, an operation part for operating the traveling device, a front side operation part is arranged at the front side of a seat of the operation part, a side operation part is arranged at the side part of the seat, a main speed change lever for performing speed change operation of the traveling speed of a machine body is arranged at the side operation part, the main speed change lever is configured to move to the front and back direction relative to a panel of the operation part through a guide rail part arranged at the operation part, a detection device for detecting the front and back movement position of the main speed change lever is arranged at the guide rail part, and a sealing part which is arranged at the main speed change lever and seals a lever moving groove of the panel moves integrally with the front and back movement of the main speed change lever.

Description

Combine harvester

Technical Field

The invention relates to a combine harvester.

Background

Conventionally, a configuration is known in which a main shift lever is provided in a manipulation unit, and the traveling speed of a machine body is shifted when the main shift lever is operated in the front-rear direction (patent document 1).

Further, a structure in which a seal member is provided in an operation groove of a main shift lever is known (patent document 2).

Documents of the prior art

Patent document

Patent document 1: japanese patent No. 6432855

Patent document 2: japanese patent laid-open No. 2020-93586

Disclosure of Invention

The former of the above-described known examples is configured to move the main shift lever in a forward and backward direction in an arc shape by a lateral axis in the left-right direction, and therefore, it is necessary to increase the distance from the main shift lever to the center of rotation, and extend the configuration of the main shift lever to a position below the operating portion.

In the latter known example, since the seal member is provided in the operation groove of the main shift lever, it is not possible to prevent the deterioration of the seal member due to the lever operation, and the seal member may be worn or broken, thereby failing to protect the internal mechanism.

In the present invention, the structure of the operation mechanism of the main shift lever is designed to ensure good operability, and the mounting structure of the seal member is designed to prevent the deterioration of the seal member associated with the forward and backward movement of the steering lever in order to reduce the installation space of the operation mechanism and to prevent the deterioration of the seal member.

The invention of claim 1 is a combine harvester, comprising: the traveling device 2, the harvesting device 4 and the threshing device 3 driven by the rotation of the engine are respectively provided, and an operation part 6 for operating them is provided, a front side operation part 12 is provided on the front side of a seat 10 of the operation part 6, a side part operation part 11 is provided on the side part of the seat 10, a main shift lever 15 for performing a shift operation of the traveling speed of the machine body is provided on the side part operation part 11, the main shift lever 15 is moved in the front-rear direction with respect to a panel 20 of the operation part 6 by a rail member 23 provided on the operation part 6, a detection device 21 for detecting the front-rear movement position of the main shift lever 15 is provided on the rail member 23, and a seal member 60 provided on the main shift lever 15 for closing a lever moving groove 17 of the panel 20 is moved integrally with the front-rear movement of the main shift lever 15.

The invention according to claim 2 is a combine harvester, wherein a seal support plate 65 that supports a seal member 60 that moves together with a main transmission lever 15 is provided on a rail member 23.

The invention according to claim 3 is a combine harvester, wherein the seal member 60 is attached to an upper surface of an attachment plate 27, the attachment plate 27 is provided on the shaft portion 26 of the main shift lever 15 and has a rectangular shape in plan view, and the seal support plate 65 is provided with an opening 66 through which the main shift lever 15 moves forward and backward.

The invention according to claim 4 is a combine harvester, and a tilt restricting mechanism 49 for restricting the left and right movement of a main transmission lever 15 is provided in a guide rail member 23.

In the invention according to claim 1, since the main shift lever 15 linearly moves in the front-rear direction with respect to the panel 20 of the operating section 6 in a side view, the operation amount of the main shift lever 15 can be sufficiently ensured, the vertical width of the operation mechanism of the main shift lever 15 can be reduced, and the space for installing the main shift lever 15 particularly in the vertical direction can be made compact, compared to the structure of the conventional circular arc main shift lever 15, and the seal member 60 provided in the main shift lever 15 and closing the lever movement groove 17 of the panel 20 moves integrally with the front-rear movement of the main shift lever 15, and therefore, by attaching the seal member 60 to the main shift lever 15 side, friction and violent collision can be suppressed, and damage to the seal member 60 can be prevented, compared to the case where only the main shift lever 15 moves with respect to the seal member 60.

In the invention according to claim 2, since the seal support plate 65 that supports the seal member 60 that moves together with the main shift lever 15 is provided in the rail member 23, the seal member 60 can move while being supported by the seal support plate 65, deformation of the seal member 60 can be prevented, and the seal support plate 65 can be reliably closed.

In the invention according to claim 3, since the seal member 60 is attached to the upper surface of the attachment plate 27, the attachment plate 27 is provided to the shaft portion 26 of the main shift lever 15 and has a rectangular shape in plan view, and the seal support plate 65 is provided with the opening 66 for movement of the guide plate 29 which moves forward and backward along with the forward and backward movement of the main shift lever 15, the seal member 60 can be easily attached to the main shift lever 15 by the attachment plate 27, and the seal member 60 can be reliably made to follow the forward and backward movement of the main shift lever 15.

In the invention according to claim 4, since the guide rail member 23 is provided with the tilting restriction mechanism 49 for restricting the left-right movement of the main shift lever 15, excessive tilting operation can be restricted when the main shift lever 15 moves left and right, the operational feeling can be improved, and deterioration or damage of the seal member 60 can be prevented.

Drawings

Fig. 1 is a side view of a combine harvester.

Fig. 2 is a top view of the combine.

Fig. 3 is a perspective view of the main gear lever.

Fig. 4 is a perspective view of the main shift lever with the seal member attached thereto.

Fig. 5 is a side view of the main gear lever.

Fig. 6 is a perspective view of the main gear lever, the mounting plate, the fixing plate and the guide plate.

FIG. 7 is a front view of the main shift lever.

FIG. 8 is a rear view of the main shift lever.

Fig. 9 is a partial longitudinal front view of the main shift lever.

Fig. 10 is a rear view of the dump limiting mechanism.

Figure 11 is a partial top view of a seal support plate portion.

FIG. 12 is a front view of another embodiment of the main shift lever mechanism.

FIG. 13 is a front view of another embodiment of the main shift lever mechanism.

Description of the reference symbols

1: a machine body frame; 2: a running device; 3: a threshing device; 4: a harvesting device; 5: a grain box; 6: an operation section; 10: a seat; 11: a side operation panel; 12: a front side operation panel; 13: a steering lever; 14: a display monitor; 15: a main gear lever; 16: a sub-gear shift lever; 17: a rod moving slot; 18: an advancing side groove; 19: a retreating side groove; 20: a panel; 21: a detection device; 23: a guide rail member; 25: a rod portion; 26: a shaft portion; 27: mounting a plate; 28: a fixing plate; 29: a guide plate; 29A: a roller; 30: a bolt; 32: a moving groove; 34: an upper side groove; 35: a lower side groove; 37: a rotating shaft; 38: an operation transmission mechanism; 39: an arm; 40: a connecting mechanism; 41: a snap-fit pin; 41A: a sliding member; 42: a moving groove; 43: a connector; 45: installing a shaft; 46: a substrate; 49: a toppling-limiting mechanism; 50: an operation limiting plate; 51: a limiting groove; 52: a restriction body; 53: a spring; 54: a housing; 55: a bolt; 57: a gap; 58: a mounting member; 60: a sealing member; 65: a seal support plate; 66: an opening part; 67: a bolt; 75: a groove.

Detailed Description

An embodiment of the present invention will be described with reference to the drawings, in which reference numeral 1 denotes a machine body frame, reference numeral 2 denotes a traveling device below the machine body frame 1, reference numeral 3 denotes a threshing device provided at a position above the machine body frame 1, reference numeral 4 denotes a harvesting device provided at a front side of the threshing device 3, reference numeral 5 denotes a grain tank for storing grains, and reference numeral 6 denotes an operation unit for operating the machine body.

The operation unit 6 is provided with a seat 10 on which an operator sits, a side operation panel 11 provided on a side of the seat 10, and a front operation panel 12 provided on a front side of the seat 10.

A steering lever 13 is provided on the right side of the front operation panel 12, and a display monitor 14 is provided on the left side of the steering lever 13. The steering lever 13 is configured to move the harvesting unit 4 up and down when operated in the forward and backward direction, and to be capable of changing the traveling direction when operated in the leftward and rightward direction.

The side operation panel 11 is provided with a main shift lever (HST lever) 15, a sub-shift lever 16, and the like.

Reference numeral 17 denotes a lever moving groove for moving the main shift lever 15 provided on the panel 20 of the side operation panel 11, and the lever moving groove 17 is formed by a forward side groove 18 and a backward side groove 19.

The main shift lever 15 of the shift lever stops output rotation of a hydraulic continuously variable transmission (not shown) at a neutral position between the forward groove 18 and the reverse groove 19 to stop traveling.

The hydraulic continuously variable transmission device switches the output rotation of an engine (not shown) to the normal rotation or reverse rotation direction and increases or decreases the output rotation speed of the engine.

When the front side of the main shift lever 15 is operated to the forward side groove 18 of the lever moving groove 17, the output rotation of the hydraulic continuously variable transmission is increased in the forward rotation direction to drive the traveling device 2 forward, and when the rear side of the main shift lever 15 is operated to the backward side groove 19 of the lever moving groove 17, the output rotation of the hydraulic continuously variable transmission is increased in the backward rotation direction to drive the traveling device 2 backward to retract the machine body.

The front and rear operation positions of the main shift lever 15 are detected by a position detection device (potentiometer) 21 provided below the panel 20 of the side operation panel 11, and the traveling speed of the traveling device 2 is shifted based on position detection information (signal) of the main shift lever 15 by the position detection device 21.

Since the conventional main shift lever 15 is configured to rotate back and forth in an arc about a rotation fulcrum provided at a lower portion, and the hydraulic continuously variable transmission is operated by the amount of rotation, in order to secure the amount of operation (amount of movement) of the main shift lever 15, it is necessary to increase the distance (vertical length) between the operation portion of the main shift lever 15 and the rotation center, and accordingly, the installation space of the main shift lever 15 and the attachment mechanism of the main shift lever 15 becomes wider in the vertical direction.

In the present invention, a guide rail member 23 which is long in the front-rear direction is provided below a panel 20 of a side operation panel 11, a main shift lever 15 is moved forward and backward by sliding along the guide rail member 23, and a detector 21 which detects the forward-and-backward movement position of the main shift lever 15 is provided below the guide rail member 23.

That is, the main shift lever 15 moves back and forth while linearly sliding with respect to the side operation panel 11 in a side view, the front and rear positions of the main shift lever 15 are detected by the detection device 21, and information (signal) of the position detection of the main shift lever 15 by the detection device 21 is output to the hydraulic continuously variable transmission device to perform a shifting operation of the traveling speed.

Therefore, since the front-rear position of the main shift lever 15 that moves forward and backward by sliding is detected by the detection device 21, the operation amount of the main shift lever 15 can be sufficiently secured in the front-rear direction as in the conventional example, and the installation space of the main shift lever 15, particularly in the vertical direction, can be made compact, compared to the conventional example in which the main shift lever 15 is moved in an arc about the pivot point.

In other words, since the main shift lever 15 is moved forward and backward by sliding along the rail member 23 provided in the operating unit 6 without performing circular rotation, the vertical widths of the moving mechanism and the detecting mechanism of the main shift lever 15 are reduced only by the vertical thicknesses of the rail member 23 and the detecting device 21.

The main shift lever 15 and the detection device 21 may have any configuration, and in one example, the main shift lever 15 is provided with a shaft portion 26 at a lower portion of a lever portion 25, and a fixing plate 28 having a longitudinal plate shape is attached to the shaft portion 26 in a fixed state.

The upper portions of the pair of right and left guide plates 29 are attached to the fixed plate 28 by bolts 30. The lower portion of the guide plate 29 is attached by inserting bolts 30 into moving grooves (moving holes) 32 of the rail members 23 provided below the panel 20.

Therefore, the main shift lever 15 is configured to move back and forth integrally with the fixed plate 28 and the guide plate 29 with respect to the fixed-side rail member 23, and the fixed plate 28 and the guide plate 29 may have a height having a vertical width that allows the main shift lever 15 to be smoothly guided back and forth, and thus, the main shift lever can be configured compactly.

The moving groove 32 is formed with an upper groove 34 through which the upper bolt 30 moves and a lower groove 35 through which the lower bolt 30 moves.

The guide rail member 23 is provided with a rotating shaft 37, the detecting device 21 is configured to detect the operating position of the main shift lever 15 by detecting the rotation amount of the rotating shaft 37, the rotating shaft 37 and the main shift lever 15 are coupled by an operation transmitting mechanism 38, and the operation transmitting mechanism 38 converts the front-back movement of the main shift lever 15 into a rotational movement and transmits the rotational movement to the rotating shaft 37.

In the embodiment, the detection device 21 is configured by a so-called "rotary potentiometer" which converts the rotation amount transmitted to the rotary shaft 37 by the operation transmission mechanism 38 into a detection.

Therefore, the vertical width of the operating mechanism of the main shift lever 15 and the detecting device 21 can be easily made compact.

The operation transmission mechanism 38 for connecting the rotary shaft 37 and the main shift lever 15 is optional, and in the illustrated example, the guide rail member 23 is formed in a T-shape in a side view of the machine body, the rotary shaft 37 is rotatably provided at a lower portion of the guide rail member 23, a lower portion of the operation detection arm 39 is attached to the rotary shaft 37, and an upper portion of the arm 39 and the lever portion 25 are connected by the connection mechanism 40.

Therefore, when the main shift lever 15 moves forward and backward, the arm 39 is pivoted via the coupling mechanism 40, and the amount of rotation of the rotary shaft 37 caused by the pivoting of the arm 39 is detected by the detector 21.

As described above, the operation transmission mechanism 38 is constituted by the arm 39 and the coupling mechanism 40.

Therefore, the main shift lever 15 and the detector 21 are associated with each other by the operation transmission mechanism 38, so that the operation position of the main shift lever 15 can be detected by the detector 21, and the space above and below the operation transmission mechanism 38 can be reduced.

The coupling mechanism 40 is arbitrary in structure, and in the illustrated example, the coupling mechanism 40 is configured by providing an engagement pin 41 on one of the arm 39 side and the guide plate 29 side, and a moving groove (moving hole) 42 on the other of the arm 39 side and the guide plate 29 side.

Therefore, the vertically long movement groove 42 and the engagement pin 41 that moves in the movement groove 42 can convert the front-rear linear movement of the main shift lever 15 into the rotational movement, and the vertical width of the operation mechanism of the main shift lever 15 can be reduced while sufficiently securing the operation amount of the main shift lever 15, and the installation space of the main shift lever 15, particularly in the vertical direction, can be made compact.

In the embodiment, the coupling mechanism 40 is provided with a moving groove 42 at an upper portion of the arm 39, and the fixed engaging pin 41 is engaged with the moving groove 42 and the guide plate 29.

Therefore, when the engagement pin 41 moves forward and backward by the forward and backward operation of the main shift lever 15, it abuts against the inner peripheral surface of the movement groove 42 of the arm 39 and presses forward or backward, and the arm 39 pivots about the rotary shaft 37, whereby the operation of the main shift lever 15 is transmitted to the rotary shaft 37, and the detection device 21 detects the operation amount of the main shift lever 15.

Reference numeral 43 denotes a connector for connecting the detection device 21 to the control unit.

The rail member 23 is provided with a mounting shaft 45 in the front-rear direction in a fixed state at a portion below a portion where the rotary shaft 37 and the detection device 21 are provided, the mounting shaft 45 is rotatably provided only on a base plate 46, and the base plate 46 is mounted on a fixed portion on the machine body side.

Therefore, the guide rail member 23 is rotated in the left-right direction about the mounting shaft 45, and allows tilting operation of the main shift lever 15 in the left-right direction, and the main shift lever 15 is moved into any one of the forward groove 18 and the reverse groove 19 of the lever moving groove 17 by the tilting operation at the neutral position T of the lever moving groove 17.

An operation limiting plate 50 of a tilting limiting mechanism 49 for limiting tilting operation of the main shift lever 15 in the left-right direction is provided at a rear portion of the lower side of the rail member 23.

The operation restricting plate 50 is provided with restricting grooves 51 on both right and left sides thereof, and restricts tilting operation of the main shift lever 15 in the right and left direction when restricting bodies (balls) 52 are engaged with the restricting grooves 51 by the elastic force of springs 53.

Therefore, the main shift lever 15 can be prevented from falling excessively at the neutral position T of the lever movement groove 17 and from colliding with the groove edge of the lever movement groove 17, and the operational feeling can be improved.

Reference numeral 54 denotes a housing which incorporates the regulating body 52 and the spring 53 and is attached to the base plate 46 so as to be adjustable in vertical position. Reference numeral 55 denotes a bolt for adjusting the height of the housing 54, and the height of the housing 54 (the regulating body 52) is adjusted by rotating the bolt 55.

A guide member 23 is provided at a position below the lower surface of the panel 20 to be activated along the movement of the main shift lever 15.

Therefore, the conventional space for the lever turning radius is not required, and the operation mechanism of the main shift lever 15 can be configured compactly.

A predetermined portion of the rail member 23 is held between a pair of left and right guide plates 29 provided on the main shift lever 15 side, and the guide plates 29 are provided to be slidable in the front-rear direction with respect to the rail member 23.

Therefore, the main shift lever 15 can move in the front-rear direction without tilting in the left-right direction with respect to the rail member 23.

The restricting grooves 51 are provided on both the left and right sides of the operation restricting plate 50 on the lower side of the rail member 23, and the restricting body 52 is engaged with the restricting grooves 51 by the elastic force of the spring 53, thereby restricting the tilting operation of the main shift lever 15 in the left-right direction.

Therefore, the stopper 52 and the spring 53 can be easily assembled, and the spring 53 only needs to be set to an elastic force stronger than the operation force for tilting the main shift lever 15 to the left and right and pressing the stopper 52 against the operation limiting plate 50, so that the elastic force of the spring 53 can be easily set or adjusted.

A rotary shaft 37 serving as a pivot point of the arm 39 is provided at a lower portion of the rail member 23.

Therefore, the right and left strokes of the main shift lever 15 can be made appropriate, and the components can be integrated.

That is, the position of the restricting body 52 is not moved relative to the main shift lever 15, and the operation restricting plate 50 is also moved in the left-right direction of the machine body in accordance with the left-right movement of the main shift lever 15, and the restricting body 52 is fitted into any of the left and right restricting grooves 51 except when moving between the left and right restricting grooves 51, so that the main shift lever 15 cannot be further inclined outward of the restricting body 52, and an appropriate lever operation without being excessively inclined outward can be performed.

Further, since the rotation shaft 37 is provided at the lower portion of the guide rail member 23, the detection device 21 is provided at the rotation shaft 37, and the guide rail member 23 and the detection device 21 are integrally attached to the base plate 46, the components of the guide rail member 23 and the detection device 21 can be integrated, and the assembly can be facilitated.

The main shift lever 15 is tilted in the left-right direction, and the main shift lever 15 and the rail member 23 are rotatably attached to the base plate 46 such that the main shift lever 45 and the rail member 23 rotate about the attachment shaft 45, and the attachment of the attachment shaft 45 and the rail member 23 is fixed by welding.

Therefore, since the mounting shaft 45 is fixed to the rail member 23 by welding in advance, the assembly work of the rail member 23 and the mounting shaft 45 is not required at the assembly site.

Further, since the tilt restricting mechanism 49 for restricting the tilting operation of the main shift lever 15 in the left-right direction is provided at the lower rear portion of the rail member 23, the main shift lever 15 in the non-operated state can be prevented from being swung in the left-right direction.

That is, since the stopper 52 of the tilt stopper mechanism 49 is urged by the elastic force of the spring 53 to engage with any one of the left and right stopper grooves 51 of the operation stopper plate 50, the main shift lever 15 can be prevented from wobbling when not being operated.

A detection device 21 for detecting the rotational position of the rotating shaft 37 is attached to the rotating shaft 37 provided on the guide rail member 23.

Therefore, the detection device 21 can be incorporated in the rail member 23 as the lever unit of the main shift lever 15, and the workability in the production line can be greatly improved.

The guide plates 29 sandwiching the rail member 23 from both the left and right sides are formed of synthetic resin.

Therefore, although the main shift lever 15 conventionally requires a plurality of components such as a bush, a pressing plate, and a fulcrum pin, which increases the cost, the guide plate 29 can serve as a guide for the main shift lever 15, a bush, and a pressing plate, and thus the assembly is easy and the cost can be reduced.

The pair of left and right guide plates 29 sandwiching the rail member 23 are formed in the same left and right shape and are the same member.

Therefore, the number of types of components can be reduced, erroneous assembly at the time of assembly can be prevented, assembly can be easily performed, and cost can be reduced.

The guide plates 29 are fixed at 4 positions, front and rear, upper and lower, by bolts 30, and gaps 57 of a predetermined width are interposed between the left and right guide plates 29 at an upper portion of the guide plates 29, and no gap 57 is provided between the left and right guide plates 29 at a lower portion of the guide plates 29.

The fixing plate 28 and the rail member 23 are each sandwiched by the guide plate 29, but the fixing plate 28 is thicker than the rail member 23.

Further, the boss portion of the guide plate 29 into which the bolt 30 is inserted protrudes from the inner surface of the guide plate 29, and the thickness of 2 boss portions of the left and right boss portions is thinner than the rod fixing plate 28. Therefore, even in a state where the upper front and rear two bolts 30 are screwed, a gap can be generated between the guide plate 29 and the rail member 23.

Further, since the guide plate 29 is formed of resin, the guide plate 29 can be flexibly fastened by screwing the pair of front and rear bolts 30 on the lower side.

Therefore, the balance between the smoothness of the main shift lever 15 during the forward and backward sliding and the lever operation load can be optimally adjusted by the tightening degree of the lower bolt 30.

The upper portions of the left and right guide plates 29 sandwich the fixing plate 28 provided on the main shift lever 15 side from the left and right sides, and the bolts 30 are fixed by penetrating the left and right guide plates 29 and the fixing plate 28.

Therefore, the guide plate 29 can be formed as a coupling member that couples the main shift lever 15 and the rail member 23, and therefore, rattling of the main shift lever 15 can be eliminated to improve the operational feeling.

The lower portions of the left and right guide plates 29 also serve as coupling members for coupling the main shift lever 15 side and the rail members 23.

Therefore, the guide plate 29 also serves as a coupling member for coupling the main shift lever 15 and the track member 23 and a guide member for guiding the forward and backward movement operation of the main shift lever 15, and the operation load of the main shift lever 15 can be adjusted by the guide plate 29, so that the rattling of the main shift lever 15 can be eliminated to improve the operation feeling, and the coupling member and the bush can be integrated with each other to suppress the cost.

A so-called super lock nut is preferably used for the lower bolt 30 that connects the guide plate 29 and the rail member 23.

If the super locknut is used, the operation load of the main shift lever 15 can be adjusted by changing the fastening amount of the bolt 30.

As shown in fig. 9, the bolts 30 may be welded to a weldable metal plate 31 that is separate from the guide plate 29 in advance, and the metal plate 31 may be attached to the guide plate 29 by the bolts 30.

That is, the guide rail member 23 is sandwiched between the 2 guide plates 29 in the left-right direction of the machine body, and the engagement pin 41 is provided on any of the left and right guide plates 29, but the structure is such that the weldable metal plate 31 separate from the guide plate 29 is positioned outside the guide plate 29 on the side where the engagement pin 41 is provided, and is attached by the bolt 30, and the head side (nut) of the bolt 30 and the engagement pin 41 are welded in advance to this metal plate.

This makes it possible to easily attach the bolt 30 and the engagement pin 41.

The guide plate 29 is provided with an engagement pin 41 of the coupling mechanism 40.

Therefore, the lining action and the engagement pin 41 are provided on the guide plate 29 that attaches the main shift lever 15 to the rail member 23, and thus the number of components can be reduced.

Since the tilt restricting mechanism 49 is provided on the guide rail member 23, the tilt restricting mechanism 49 is configured such that the operation restricting plate 50 is provided on the guide rail member 23 that rotates in the left-right direction about the mounting shaft 45 together with the main shift lever 15, and the restricting body 52 that engages with the restricting groove 51 is provided on the side of the base plate 46, the restricting body 52, the spring 53, and the housing 54 of the tilt restricting mechanism 49 can be unitized in addition to the operation restricting plate 50, and the spring force adjustment of the spring 53 is not necessary, and the assembly can be easily performed.

The tilting restriction mechanism 49 restricts the tilting operation of the main shift lever 15 to the outer side of the engagement position when the stopper 52 is engaged with the restriction groove 51, and the stopper 52 of the tilting restriction mechanism 49 is formed of "balls", so that the adjustment of the spring 53 is easy. Further, the operational feeling of the main shift lever 15 can be changed by the shape of the restriction groove 51, and the operational feeling can be easily changed.

The tilt regulating mechanism 49 has a regulating body 52 and a spring 53 built in a housing 54, and the housing 54 is attached to the base plate 46 by a bolt 55 so as to be movable in the vertical direction.

Therefore, by changing the vertical position of the housing 54 with the bolt 55, the engagement force with which the stopper 52 engages with the stopper groove 51 can be adjusted, the adjustment structure of the spring 53 can be simply configured, and the elastic force adjustment itself can be easily performed.

In the embodiment, the housing 54 is formed of a cylinder, and the bolt 55 is formed so that the bolt diameter is larger than the diameter of the ball as the regulating body 52.

That is, the upper portion of the housing 54 is opened to have a smaller diameter than the diameter of the regulating body 52, and the regulating body 52 protrudes from the upper portion of the housing 54, but the regulating body 54 is configured not to fly out, and the lower opening portion of the housing 54 is formed to have a larger diameter than the diameter of the regulating body 52, so that the regulating body 52 can be inserted into the housing 54 from the lower side of the housing 54.

Therefore, when the stopper 52 and the spring 53 are put into the case 54 from the bolt 55 side and the bolt 55 is screwed into the case 54 from the lower side, the assembly can be completed and the assembly of the tilt stopper mechanism 49 is facilitated.

The guide rail member 23 is provided with a seal member 60.

Conventionally, a lever moving groove 17 in the front-rear direction in which the main shift lever 15 moves is formed in the face plate 20, a seal member that closes the lever moving groove 17 is provided on the lower surface of the face plate 20, and a gap in which the main shift lever 15 moves is formed in the center of the seal member.

Therefore, the conventional seal member is fixed to the panel 20 side, and the movement of the main shift lever 15 causes the deterioration of the gap of the seal member, which results in an increase in the gap and entry of foreign matter such as dust below the panel 20. In addition, the presence of the seal member becomes an operation resistance of the main shift lever 15, or the seal member itself is broken and damaged.

In the present invention, the seal member 60 that closes the lever movement groove 17 of the panel 20 through which the main shift lever 15 moves is attached to the main shift lever 15 side, and moves together with the main shift lever 15 in accordance with the operation of the main shift lever 15.

Therefore, since the seal member 60 does not need to be provided with a slit for moving the main shift lever 15, and the seal member 60 can be prevented from being deteriorated by the operation of the main shift lever 15, it is possible to prevent foreign matter such as dust from entering the front operation panel 12 below the panel 20, and the seal member 60 moves together with the main shift lever 15, so that the presence of the seal member 60 does not become the operation resistance of the main shift lever 15.

The seal member 60 is provided in any configuration, and a seal support plate 65 formed to be long in the front-rear direction of the machine body is attached to the rail member 23. The seal support plate 65 is disposed below the lower surface of the panel 20.

The seal support plate 65 is provided with an opening 66 for the attachment plate 27 to move forward and backward, and the attachment plate 27 is positioned in the opening 66. The seal member 60 is attached to the upper surface of the mounting plate 27 by bolts 67.

Therefore, since the seal support plate 65 and the rail member 23 are in a stationary state with respect to the forward and backward movement (forward and backward operation) of the main shift lever 15, when the main shift lever 15 is moved forward and backward in fig. 5, the mounting plate 27 is moved forward and backward in the opening 66 (fig. 11) of the seal support plate 65, and the seal member 60 is moved forward and backward with respect to the seal support plate 65 integrally with the main shift lever 15 and the mounting plate 27 by the movement of the mounting plate 27.

The forward side groove 18 of the lever moving groove 17 is formed to have a width larger than that of the backward side groove 19.

Therefore, the left-right width of the forward-side groove 18 is increased, and the main shift lever 15 can be easily moved from the reverse-side groove 19 to the forward-side groove 18.

The positional relationship between the guide rail member 23 and the tilt restricting mechanism 49 is arranged such that the arm 39 abuts against the operation restricting plate 50 when the main shift lever 15 is operated to the rearmost retraction side of the retraction side groove 19 of the lever movement groove 17.

Therefore, when the main shift lever 15 is moved backward, the main shift lever 15 can be prevented from hitting the retreating side groove 19, and friction caused by the main shift lever 15 hitting the retreating side groove 19 sharply and damage and wear of the retreating side groove 19 due to a strong collision can be prevented.

An attachment plate 27 is attached to the shaft portion 26 of the main shift lever 15.

Therefore, the seal member 60 can be easily moved integrally with the main shift lever 15, and a gap can be prevented from being generated in the lever moving groove 17 depending on the operation position of the main shift lever 15.

A groove 75 is provided in the fixed plate 28 of the main shift lever 15.

Therefore, the wire harness of the main shift lever 15 from the lever portion 25 can be passed.

A wire harness larger than the groove 75 provided in the fixing plate 28 is provided in the rail member 23.

Therefore, the wire harness of the main shift lever 15 from the lever portion 25 can be passed.

The seal member 60 is provided symmetrically on both left and right sides with respect to the main shift lever 15, and closes the lever movement groove 17.

Therefore, as compared with the case where the sealing member is attached to the lower surface of the panel 20 in the related art, the width of the sealing member 60 can be reduced, and the cost can be reduced.

The lever moving groove 17 is disposed such that the forward groove 18 and the reverse groove 19 are positioned in opposite left and right directions with respect to each other with respect to the neutral position T of the lever moving groove 17, and are arranged in opposite directions with respect to the tilting direction of the main shift lever 15.

In the embodiment, the forward-side groove 18 is located on the right side of the neutral position T, and the reverse-side groove 19 is located on the left side of the neutral position T in a plan view.

Therefore, the main shift lever 15 can be prevented from being compactly configured while the attachment plate 27 is seen from the lever moving groove 17 when it is tilted to the left or right at the neutral position T.

Fig. 12 shows another embodiment of the moving mechanism of the main shift lever 15 and the detecting device 21, in which the detecting device 21 is constituted by a so-called "slide potentiometer", a slide member 41A that moves back and forth together with the main shift lever 15 is provided on the main shift lever 15 side, and the front and rear positions of the slide member 41A are detected by the detecting device 21.

The slide member 41A corresponds to the engaging pin 41 provided on the guide plate 29 of the first embodiment.

Therefore, the detection device 21 detects the front-rear position of the slide member 41A (the engagement pin 41) that moves integrally with the front-rear movement of the main shift lever 15, thereby detecting the front-rear position of the main shift lever 15.

Since the main shift lever 15 is guided by the rail member 23 and the guide plate 29 to move forward and backward, the moving mechanism and the detecting mechanism of the main shift lever 15 are configured only by the vertical thicknesses of the rail member 23 and the detecting device 21 without performing circular rotation as in the conventional art, and the vertical width is reduced.

Although not shown, the detection device 21 is attached to the side of the rail member 23 by an attachment member (not shown).

Therefore, the guide rail member 23 and the detector 21 are integrally rotated in the left-right direction about the mounting shaft 45, the tilting operation of the main shift lever 15 in the left-right direction is allowed, and the main shift lever 15 can be moved and operated to the forward-side groove 18 and the backward-side groove 19 of the lever moving groove 17 by the tilting operation of the main shift lever 15 in the left-right direction.

Fig. 13 shows another embodiment of the moving mechanism of the main shift lever 15 and the detecting device 21, in which the detecting device 21 is constituted by a so-called "slide potentiometer", a slide member 41A that moves back and forth together with the main shift lever 15 is provided on the main shift lever 15 side, and the front and rear positions of the slide member 41A are detected by the detecting device 21.

Specifically, the rail member 23 for guiding the movement of the main shift lever 15 is formed in a horizontal plate shape, and a vertically penetrating movement groove 34 for moving the guide plate 29 of the main shift lever 15 is provided in the rail member 23. A pair of upper and lower rollers 29A are provided in the guide plate 29 in a pair in the front-rear direction, and the guide member 23 is sandwiched from the upper and lower sides by the upper and lower rollers 29A.

Accordingly, the main shift lever 15 slides back and forth along the moving groove 34 of the rail member 23.

The guide plates 29 are provided in a pair of right and left, the right and left guide plates 29 are fixedly attached to a vertical plate-shaped fixing plate 28, the fixing plate 28 is fixedly attached to the main shift lever 15, and the fixing plate 28 extends downward from the lower edge of the guide plates 29.

The lower edge of the fixed plate 28 is made to be a slide member 41A, the slide member 41A is made to face the inside of the detection device 21, and the detection device 21 is constituted by a so-called "slide potentiometer" which is provided below the rail member 23 and is capable of detecting a position where linear motion is possible.

Therefore, since the main shift lever 15 moves forward and backward while the guide rail member 23 is sandwiched between the upper and lower rollers 29A, the moving mechanism and the detecting mechanism of the main shift lever 15 can be configured only by the thicknesses of the guide rail member 23 and the detecting device 21 in the vertical direction without performing circular rotation as in the conventional case, and the vertical width can be reduced.

The detection device 21 is provided with a mounting member 58 below the detection device 21, the mounting member 58 is rotatably provided on the base plate 46 by a mounting shaft 45 in the front-rear direction, and the base plate 46 is mounted on a fixed portion on the machine body side.

Therefore, the guide rail member 23, the detector 21, and the mounting member 58 are integrally rotated in the left-right direction about the mounting shaft 45, tilting operation of the main shift lever 15 in the left-right direction is permitted, and the main shift lever 15 can be moved to the forward-side groove 18 and the reverse-side groove 19 of the lever moving groove 17 by tilting operation of the main shift lever 15 in the left-right direction.

Claims (4)

1. A combine-harvester, wherein,

the combine harvester is composed of: a traveling device (2), a harvesting device (4) and a threshing device (3) which are driven by the rotation of an engine are respectively arranged, an operation part (6) for operating the traveling device, a front side operation part (12) is arranged at the front side of a seat (10) of the operation part (6), a side operation part (11) is arranged at the side part of the seat (10), a main gear lever (15) for performing the speed change operation of the traveling speed of a machine body is arranged at the side operation part (11), the main gear lever (15) is configured to move in the front and back direction relative to a panel (20) of the operation part (6) through a guide rail part (23) arranged at the operation part (6), a detection device (21) for detecting the front and back movement position of the main gear lever (15) is arranged at the guide rail part (23), and a sealing part (60) which is arranged at the main gear lever (15) and seals a lever moving groove (17) of the panel (20) moves integrally with the front and back movement of the main gear lever (15).

2. A combine harvester according to claim 1,

a seal support plate (65) that supports a seal member (60) that moves together with the main shift lever (15) is provided on the guide rail member (23).

3. A combine harvester according to claim 2,

the seal member (60) is attached to the upper surface of an attachment plate (27), the attachment plate (27) is provided to the shaft section (26) of the main shift lever (15) and has a rectangular shape in plan view, and the seal support plate (65) is provided with an opening (66) through which the main shift lever (15) can move forward and backward.

4. A combine harvester according to any one of claims 1 to 3,

a tilt limiting mechanism (49) for limiting the left and right movement of the main gear lever (15) is provided on the guide rail member (23).

Images