JP2014177223A - Work vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a work vehicle capable of increasing working efficiency, without deteriorating operability of a control lever, even when a driver seat is shifted in a longitudinal direction with respect to a machine body.SOLUTION: A work vehicle includes a driver seat 27, at least one of control levers 31 and 32, and movement means 47R, 47L, 48R, 48L and 49 for making the driver seat 27 movable in a longitudinal direction with respect to a machine body. A support part of the control lever is provided movably in the longitudinal direction with respect to the machine body together with the driver seat 27.

Description

  The present invention relates to a work vehicle including a driver's seat, at least one operation lever, and a moving unit that allows the driver's seat to move in the front-rear direction with respect to the airframe.

  A conventional work vehicle can attach a work machine to the vehicle body via a link mechanism and a lifting device for raising and lowering the work machine, and can also disconnect a lift lever that operates the lifting device and transmission of power from the engine to the work machine Some control levers such as a PTO lever are arranged near the driver's seat to improve operability (for example, Patent Document 1).

JP 2000-262106 A

  However, in a work vehicle in which the position of the driver's seat can be changed according to the physique of the operator by making the driver's seat movable in the front-rear direction, the operation lever for the driver's seat can be moved by moving the driver's seat Since the positional relationship changes, the operability of the operation lever is deteriorated. Accordingly, it is an object of the present invention to provide a work vehicle capable of improving work efficiency without deteriorating the operability of the operation lever even when the driver's seat is moved in the front-rear direction with respect to the airframe.

Therefore, the invention described in claim 1
The driver ’s seat,
At least one operating lever;
In a work vehicle comprising a moving means that allows the driver's seat to move in the front-rear direction relative to the aircraft
A support portion of the operation lever is provided to be movable in the front-rear direction with respect to the airframe together with the driver seat.

According to a second aspect of the present invention, in the work vehicle according to the first aspect,
The moving means includes a rail portion extending in the front-rear direction of the aircraft,
A rail receiving portion on which the rail slides;
While supporting the driver's seat, and comprising a pedestal portion provided on the rail,
The support portion of the operation lever is provided on the pedestal portion.

The invention according to claim 3 is the work vehicle according to claim 1 or 2,
An operation lever cover having an operation lever guide for restricting movement of the operation lever during operation;
The operation lever cover is provided so as to be movable in the front-rear direction with respect to the airframe together with the support portion of the operation lever.

The invention according to claim 4 is the work vehicle according to any one of claims 1 to 3,
The support lever support portion is provided to be movable in the front-rear direction with respect to the driver seat.

The invention according to claim 5 is the work vehicle according to any one of claims 1 to 4,
The driver seat and the operation lever support portion, or the driver seat or the operation lever support portion are vibration-proof supported by a vibration-proof member.

  According to the first aspect of the present invention, in a work vehicle including a driver's seat, at least one operation lever, and moving means that allows the driver's seat to move in the front-rear direction with respect to the aircraft, Since the support portion is provided so as to be movable in the front-rear direction with respect to the aircraft with the driver seat, even if the driver seat is moved in the front-rear direction with respect to the aircraft, the positional relationship of the operation lever with respect to the driver seat does not change, It is possible to provide a work vehicle capable of improving work efficiency without deteriorating the operability of the operation lever.

  According to a second aspect of the present invention, the moving means supports a rail portion extending in the front-rear direction of the fuselage, a rail receiving portion on which the rail slides, the driver seat, and the rail. Since the support portion of the operation lever is provided on the pedestal portion, even if the driver seat is moved in the front-rear direction with respect to the fuselage with a simple configuration, Since the positional relationship of the operation lever does not change, it is possible to provide a work vehicle that can improve the work efficiency without deteriorating the operability of the operation lever.

  According to a third aspect of the present invention, an operation lever cover having an operation lever guide for restricting movement of the operation lever during operation is provided, and the operation lever cover is attached to the airframe together with the support portion of the operation lever. Because it is provided so as to be movable in the front-rear direction, even if the driver's seat is moved in the front-rear direction with respect to the aircraft, the operation lever cover also moves following the driver's seat, and the positional relationship of the operation lever with respect to the driver's seat does not change It is possible to provide a work vehicle that can improve work efficiency without deteriorating the operability of the operation lever.

  According to the fourth aspect of the invention, since the support portion of the operation lever is provided so as to be movable in the front-rear direction with respect to the driver seat, the positional relationship of the operation lever with respect to the driver seat can be adjusted. It is possible to provide a work vehicle capable of moving the driver's seat in the front-rear direction with respect to the aircraft while maintaining the positional relationship, improving the operability of the operation lever and improving the work efficiency. it can.

  According to the fifth aspect of the present invention, the driver seat and the operating lever supporting portion, or the driver seat or the operating lever supporting portion are supported by the vibration isolating member. The vibration propagating from the fuselage to the driver's seat can be reduced, the operator's comfort is improved, and the work efficiency is further improved. In addition, vibration propagating from the machine body of the work vehicle to the operation lever can be reduced, and the operability of the operation lever is further improved.

It is a side view of a tractor as an example of the work vehicle of this invention. It is a partial enlarged view of a driver's seat floor. It is a side view for demonstrating the support structure of a driver's seat. It is a front view for demonstrating the support structure of a driver's seat. It is a perspective view for demonstrating attachment of an operation lever. It is a perspective view for demonstrating the support structure of an operation lever.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a side view of a tractor as an example of the work vehicle of the present invention, and FIG. 2 is a partially enlarged view of a driver's seat floor. The tractor 10 (work vehicle) includes an engine E, a radiator, a cooling fan, an air cleaner, a battery, and the like in a bonnet 11. Further, the front part of the hood 11 is provided with a headlamp 12 and a front grill 13 for taking outside air into the hood 11. The engine E, the radiator, and the battery are placed on the chassis 14. In addition, front wheels 15 and 15 are provided on the front left and right of the aircraft, and rear wheels 16 and 16 are provided on the rear left and right. Fenders 17 and 17 are provided so as to cover the left and right rear wheels 16 and 16 from above and inside, respectively.

  A dashboard 18 is provided behind the hood 11 via an air cut plate. The dashboard 18 is provided with a panel for displaying speed, fuel remaining amount and the like. A steering column cover 20 is provided adjacent to the rear of the dashboard 18. A steering wheel 21 is protruded from the upper end of the steering column cover 20. A reverser lever 22 is provided on the left side of the steering wheel 21 on the upper surface of the steering column cover 20. Left and right brake pedals 24 and 24 are provided on the lower right side of the steering column cover 20, and a clutch pedal 25 is provided on the lower left side of the steering column cover 20.

  A driver's seat 27 is provided behind the steering column cover 20 at a predetermined distance. The driver's seat 27 is disposed between the left and right fenders 17 and 17. The driver's seat 27 is attached on the driver's cab 28. A main transmission lever 31 and a lift lever 32 are provided on the right side of the driver seat 27. On the other hand, on the left side of the driver's seat 27, an auxiliary transmission lever 33 and a PTO lever 34 are provided.

  A floor 35 is provided between the cab 28 and the bonnet 11. The floor 35 is used when the driver gets on and off the tractor 10 or puts his / her foot while driving. An accelerator pedal 26 is provided on the right side of the floor 35. Below the floor 35, a transmission case TM incorporating a transmission is arranged. The transmission case TM is fixed to the rear part of the chassis 14. The power from the engine E is transmitted to the rear wheels 16 and 16 via the transmission. Further, a working machine lifting mechanism 36 for lifting the working machine is attached to the rear upper surface of the transmission case TM.

  The support structure of the passenger seat 27 will be described in detail with reference to FIGS. 3 and 4. Seat brackets 41F and 41B extending in the left-right direction are attached to the upper surface of the cab 28 in the front-rear direction. Rail receivers 42R and 42L extending in the front-rear direction are provided on the left and right and supported by seat brackets 41F and 41B. The rails 43R, 43L extending in the front-rear direction are supported by the rail receivers 42R, 42L so as to be slidable in the front-rear direction. A pedestal 44 that supports the driver's seat 27 is attached to the top of the rails 43R and 43L. That is, the driver seat 27 supported by the base 44 can be moved in the front-rear direction by the rail receivers 42R, 42L and the rails 43R, 43L. The rail receiver 42L and the rail 43L are provided with a fixture 45 for fixing the sliding of the rail 43L. The sliding and fixing of the rail 43L is performed by operating a lever 46 provided in the fixture 45. With the fixture 45, the driver's seat 27 supported by the pedestal 44 can be moved in the front-rear direction or fixed.

  Connecting plates 47R and 47L projecting upward are formed on the upper front portion of the pedestal 44, and connecting plates 48R and 48L projecting downward are formed on the front bottom portion of the driver's seat 27. By connecting the connecting plates 47R and 47L and the connecting plates 48R and 48L with the support shaft 49, the driver's seat 27 can be rotated in the front-rear direction with the support shaft 49 as a rotation axis. Anti-vibration springs 50R and 50L that elastically contact and support the driver's seat are fixed to the bottom rear portion of the driver's seat 27. The support structure of the driver's seat 27 is not limited to the above-described configuration as long as the driver's seat 27 can be moved in the front-rear direction.

  Here, the driver's seat 27 is supported by anti-vibration by anti-vibration springs 50R and 50L which are anti-vibration members. Therefore, vibration propagating from the fuselage of the tractor 10 to the driver's seat 27 can be reduced, and the operator's comfort is improved. The driver's seat 27 only needs to be supported by a vibration isolating member, and the configuration of the vibration isolating support is not limited to the above, and the vibration isolating member is not limited to a spring. For example, the vibration isolating member may be rubber that is an elastic member. Moreover, the structure which provides a vibration proof member between the cab 28 and the seat brackets 41F and 41B may be sufficient. The anti-vibration support of the driver's seat 27 may be an anti-vibration support by a pantograph mechanism or an anti-vibration support by a mechanism including a piston and a cylinder. The driver seat 27 may be configured not to be supported by the vibration isolating member.

  Next, a support structure for various operation levers will be described in detail with reference to FIGS. First, the support of the main transmission lever 31 and the lift lever 32 will be described. The main transmission lever 31 and the lift lever 32 are arranged on the right side of the driver's seat 27 and in parallel between the driver's seat 27 and the right fender 17 in the left-right direction of the fuselage. The main transmission lever 31 and the lift lever 32 are rotatable in the front-rear direction of the machine body. The lift lever 32 is disposed closer to the driver's seat 27 than the main transmission lever 31 and on the rear side of the fuselage. The rotation of the main transmission lever 31 and the lift lever 32 is regulated by a main transmission lever guide 52 and a lift lever guide 53 which are through holes provided in the top surface of the lever cover 51R.

  As shown in FIGS. 5 and 6, the main transmission lever 31 and the lift lever 32 are rotatably supported by one lever support member 60R, and are integrally formed. The lever support member 60R is an L-shaped plate member extending in the front-rear direction, and includes a bottom portion 61R and an upper portion 62R. The lever support member 60R is attached to the right side of the upper surface of the base 44, and the bottom 61R is fixed to the base 44 with bolts or the like. The lever support member 60R rotatably supports the main transmission lever 31 and the lift lever 32 on the upper portion 62R. The lever cover 51R is attached to the upper part 62R of the lever support member 60R with a bolt or the like. The lever support member rotatably supports the main transmission lever 31 and the lift lever 32, and can be assembled to a part that moves integrally with the driver seat 27 (for example, the base 44 or the bottom surface of the driver seat 27). What is necessary is just to be a thing and it is not limited to the above-mentioned structure. For example, the lever support member and the lever cover may be integrated. In addition, the lever support member and the pedestal need not be separate members, and the lever support member and the pedestal may be integrated.

  Here, the lever support member 60R is fixed to the pedestal 44 with bolts, but a rubber sheet, which is a vibration proof member, is interposed between the lever support member 60R and the pedestal 44 to dampen the lever support member 44. It is good also as a structure fixed to the base 44 by carrying out anti-vibration support by the member. With such a configuration, vibration propagating from the body of the tractor 10 to the various operation levers can be reduced, and the operability of the various operation levers is improved. In addition, the support part of various operation levers should just be supported by the anti-vibration member, and the structure of the anti-vibration support is not limited to the above, and the anti-vibration member is not limited to the rubber sheet. Absent. For example, the vibration isolating member may be a spring that is an elastic member. Further, the anti-vibration support of the support portions of the various operation levers may be an anti-vibration support by a pantograph mechanism or an anti-vibration support by a mechanism including a piston and a cylinder.

  In addition, it is desirable that the vibration isolating member that supports and supports the support portions of the various operation levers is an elastic member or a vibration isolation mechanism having a strength that does not greatly deform due to a force when operating the various operation levers. If the elastic member etc. is greatly deformed by the force when operating the operation lever (for example, the force that rotates the operation lever), the operation force will be dispersed or the operation direction of the operation lever will change. This is to prevent the operation lever from becoming difficult to operate. Further, when the driver's seat 27 is supported by a vibration isolating member, the support portions of the various operation levers are further supported by the vibration isolating member at a portion where the driver's seat 27 is supported by the vibration isolating member. It is desirable to have a configuration for mounting. With such a configuration, the support portions of the various operation levers are vibration-isolated by the two vibration isolation members of the driver seat and the vibration control members of the support portions of the various operation levers. Vibration transmitted from the machine body to the various operation levers can be reduced more effectively, and the operability of the various operation levers is improved.

  The main transmission lever 31 includes a grip 65 at the upper end of the arm 63 and a rotation shaft 67 at the lower end of the arm 63. The rotation shaft 67 is provided perpendicular to the arm 63, and the tip of the rotation shaft 67 is rotatably attached to the upper portion 62R of the lever support member 60R. The rotating shaft 67 includes a boss 69 perpendicular to the rotating shaft 67, and one end of a push-pull wire 71 is rotatably attached to the tip of the boss 69. The push-pull wire 71 is held by a support bracket 73 protruding from the upper part 62R of the lever support member 60R.

  The lift lever 32 includes a grip 66 at the upper end of the arm 64 and a rotation shaft 68 at the lower end of the arm 64. The rotation shaft 68 is provided perpendicular to the arm 64, and the tip of the rotation shaft 68 is rotatably attached to the upper portion 62R of the lever support member 60R. The rotating shaft 68 includes a boss 70 perpendicular to the rotating shaft 68, and one end of a push-pull wire 72 is rotatably attached to the tip of the boss 70. The push-pull wire 72 is held by a support bracket 74 protruding from the upper part 62R of the lever support member 60R.

  With this configuration, when the main transmission lever 31 is operated, the rotation shaft 67 rotates, and the boss 69 provided on the rotation shaft 67 also rotates, so that the push-pull wire 71 is moved in the front-rear direction. It is pushed and pulled by. The push-pull wire 71 is connected to the speed change mechanism, and operates the speed change mechanism according to the behavior of the push-pull wire 71 to change the speed.

  When the lift lever 32 is operated, the rotation shaft 68 is rotated, and the boss 70 provided on the rotation shaft 68 is also rotated, so that the push-pull wire 72 is pushed and pulled in the front-rear direction. The push-pull wire 72 is connected to the work machine lifting mechanism 36, and the work machine lifting mechanism 36 is operated by the behavior of the push-pull wire 72 to move the lift arm provided in the work machine lifting mechanism 36. The working machine attached to the working machine lifting mechanism 36 is lifted and lowered.

  Next, support of the auxiliary transmission lever 33 and the PTO lever 34 will be described. The auxiliary transmission lever 33 and the PTO lever 34 are arranged on the left side of the driver's seat 27 and in parallel between the driver's seat 27 and the left fender 17 in the left-right direction of the fuselage. The auxiliary transmission lever 33 and the PTO lever 34 are rotatable in the front-rear direction of the machine body. The auxiliary transmission lever 33 is disposed closer to the driver's seat 27 than the PTO lever 34. The rotation of the auxiliary transmission lever 33 and the PTO lever 34 is regulated by an auxiliary transmission lever guide 54 and a PTO lever guide 55 which are through holes provided in the top surface of the lever cover 51L.

  The auxiliary transmission lever 33 and the PTO lever 34 are rotatably supported by one lever support member 60L, and are configured integrally. The lever support member 60L is fixed to the left side of the upper surface of the base 44 with a bolt or the like. The lever cover 51L is attached to the lever support member 60L with a bolt or the like. Push-pull wires (not shown) are connected to the auxiliary transmission lever 33 and the PTO lever 34, respectively. The push-pull wire connected to the sub-transmission lever 33 is connected to the sub-transmission mechanism, and the sub-transmission mechanism is operated by the behavior of the push-pull wire to perform a shift. The push-pull wire connected to the PTO lever 34 is connected to the PTO clutch, and the PTO clutch is operated according to the behavior of the push-pull wire, and power transmission to the PTO shaft is turned on / off, and the rotational speed is changed. The support structure of the sub-transmission lever 33 and the PTO lever 34 is the same as the support structure of the main transmission lever 31 and the lift lever 34 described above, and details thereof are omitted.

  As described above, the main transmission lever 31 and the lift lever 32 have an integral structure that is rotatably supported by one lever support member 60R. The lever support member 60R is fixed to the base 44, and a push-pull wire is provided. By connecting 71 and 72 to each device, the main transmission lever 31 and the lift lever 32 are assembled to the airframe. Further, the auxiliary transmission lever 33 and the PTO lever 34 are integrally configured to be rotatably supported by one lever support member 60L. The lever support member 60L is fixed to the base 44, and the push-pull wire is connected to each device. As a result, the auxiliary transmission lever 33 and the PTO lever 34 are assembled to the airframe.

  Therefore, each operation lever is attached to the base 44 that supports the driver's seat 27 via the support members 60R and 60L. Therefore, when the driver's seat 27 is moved in the front-rear direction with respect to the fuselage, each operation lever also becomes a driver's seat. 27 and move together. Further, the lever covers 51R and 51L also follow and move. That is, the positional relationship of each operation lever with respect to the driver's seat 27 does not change, and the work efficiency can be improved without deteriorating the operability of each operation lever. Further, since a plurality of operation levers can be assembled to the airframe at once, the assembling work is simplified. Here, since each operation lever is connected to each device by a push-pull wire which is a flexible connecting member, even if each operation lever moves in the front-rear direction with respect to the machine body, each operation lever rotates, etc. Can be transmitted to each device.

  In the above example, the operation levers are the main transmission lever 31, the lift lever 32, the auxiliary transmission lever 33, and the PTO lever 34. However, the operation levers are not limited to these, and the arrangement positions of these operation levers. Is not limited.

  Further, the rotation direction of each operation lever is not limited to the front-rear direction rotation of the airframe, and any configuration in which the support portion of each operation lever moves integrally with the driver's seat, for example, The airframe may be rotated in the left-right direction. In addition, an operation lever that can be flexibly rotated in front, rear, left, and right of the airframe may be used.

  In addition, the connection between each operation lever and each device is not limited to the connection with the push-pull wire as described above, and even if the support portion of each operation lever moves relative to the machine body, Any device may be used as long as each device can be operated by a behavior such as movement. For example, a configuration may be provided in which position detection means such as a potentiometer for detecting behavior such as rotation of each operation lever and control means for operating each device based on this position detection means may be provided. With such a configuration, the signal of the position detection means can be transmitted to the control means by a flexible electric wire or radio wave, and even if the support portion of each operation lever moves relative to the machine body, Each device can be operated by behavior such as movement.

  Further, the mounting of each operation lever is not limited to the configuration in which the operation lever is fixed to the pedestal via the lever support member, but may be any configuration as long as the support portion of each operation lever moves integrally with the driver's seat. For example, the lever support member may be configured to be fixed to the pedestal via moving means that allows the lever support member to move in the front-rear, left-right, and up-down directions. The moving means may be, for example, a slide mechanism using a rail and a rail receiver, a pantograph mechanism for moving in the vertical direction, or the like. With such a configuration, the positional relationship of the operation lever with respect to the driver's seat can be adjusted, and the driver's seat can be moved in the front-rear direction with respect to the aircraft while maintaining the positional relationship. The operability can be improved and the work efficiency can be improved.

  The present invention is not limited to tractors, and can be applied to work vehicles and any self-propelled vehicles.

10 Tractor (work vehicle)
27 Driver's seat 31 Main transmission lever 32 Lift lever 33 Sub transmission lever 34 PTO lever 42R, 42L Rail receiver 43R, 43L Rail 51R, 51L Lever cover 52 Main transmission lever guide 53 Lift lever guide 54 Sub transmission lever guide 55 Lift lever guide

Claims (5)

The driver ’s seat,
At least one operating lever;
In a work vehicle comprising a moving means that allows the driver's seat to move in the front-rear direction with respect to the fuselage,
The work vehicle is provided with a support portion of the operation lever that is movable in the front-rear direction with respect to the airframe together with the driver seat. The moving means includes a rail portion extending in the front-rear direction of the aircraft,
A rail receiving portion on which the rail slides;
While supporting the driver's seat, and comprising a pedestal portion provided on the rail,
The work vehicle according to claim 1, wherein a support portion of the operation lever is provided on the pedestal portion. An operation lever cover having an operation lever guide for restricting movement of the operation lever during operation;
The work vehicle according to claim 1, wherein the operation lever cover is provided so as to be movable in the front-rear direction with respect to the airframe together with the support portion of the operation lever.   The work vehicle according to any one of claims 1 to 3, wherein a support portion of the operation lever is provided so as to be movable in the front-rear direction with respect to the driver seat.   5. The driver seat and the support portion of the operation lever, or the driver seat or the support portion of the operation lever are vibration-proof supported by a vibration-proof member. Work vehicle.

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