JP2006306236A - Tractor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To separate an operation lever so as not to interfere with another operation lever, to arrange the operation lever at an easy-to-operate position, and to improve the operability of a plurality of the operation levers as a whole. <P>SOLUTION: In the tractor, a driver's seat is provided between a pair of right and left rear wheel fenders, and the plurality of the operation levers is provided between the driver's seat and a first rear wheel fender. At lease one operation lever is supported on an outer surface side of the rear wheel fender, and a grip portion side of the operation lever is projected out to an inner side in a lateral direction of the rear wheel fender while penetrating the rear wheel fender. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a tractor.

The tractor has a driver seat between a pair of left and right rear wheel fenders. Between the driver seat and one rear wheel fender, a main transmission lever, hand accelerator lever, auxiliary control lever, auxiliary transmission lever, PTO lever, etc. Are provided with a plurality of operating levers (for example, Patent Document 1, Patent Document 2, and Patent Document 3).
In this type of tractor, in order to facilitate operation of the operation lever, it is preferable to arrange a plurality of operation levers so as to be concentrated on the right front side of the driver's seat or the like. However, if the plurality of operation levers are concentrated on the front side on the right side of the driver's seat, the plurality of operation levers are too close to each other, making it difficult to operate the operation lever. Therefore, conventionally, in order to dispose the PTO lever, etc. among the plurality of operation levers away from the other operation levers, for example, the PTO lever is disposed on the left side of the driver seat or on the rear side of the driver seat. There are some (for example, Patent Document 1 and Patent Document 2). In this case, since the PTO lever and the like are greatly disengaged from the right front portion side of the driver's seat, which is an easy-to-operate position, there is a problem that it becomes difficult to operate the operation lever such as the PTO lever among the plurality of operation levers. .
JP 2001-206096 A JP 2000-247240 A Japanese Patent Laid-Open No. 10-166882

  In view of the above problems, the present invention allows the operation lever to be separated so as not to interfere with other operation levers, and can be disposed at a position where it can be easily operated, so that the operability of the plurality of operation levers as a whole is improved. It is a thing.

The technical means of the present invention for solving this technical problem is that a driver's seat is provided between the pair of left and right rear wheel fenders, and a plurality of operation levers are provided between the driver's seat and one of the rear wheel fenders. In the tractor
At least one operation lever is supported on the outer surface side of the rear wheel fender, and the grip portion side of the operation lever penetrates the rear wheel fender and protrudes inward in the left-right direction of the rear wheel fender. .
Further, according to another technical means of the present invention, the rear wheel fender is provided with a recessed portion that is recessed outward in the left-right direction, corresponding to the operation lever of 1 above, and the grip portion side of the operating lever has a recessed portion. It is in the point which penetrates and protrudes in the left-right direction inner side of the rear-wheel fender.

According to another technical means of the present invention, the concave portion includes a bottom wall portion that is inclined forward and upward in the left-right direction, and a side wall portion that stands upward from the left-right outer end portion of the bottom wall portion. And an insertion window is provided in the bottom wall portion of the recess, and the grip portion side of the first operation lever is inserted through the insertion window and disposed inward in the left-right direction of the side wall portion. .
Further, according to another technical means of the present invention, a side cover is provided on the outer surface side of the one rear wheel fender so as to cover the base side of the first operation lever from the outside in the left-right direction. A support member for supporting the base side of the one operation lever is provided between the cover and the one rear wheel fender.

  According to another technical means of the present invention, the first operation lever is a PTO lever, and a main transmission lever and a sub-transmission lever are provided on the front side of the PTO lever between the driver's seat and one rear wheel fender. And a hand accelerator lever and an auxiliary control lever are provided.

  According to the present invention, the operation lever can be separated so as not to interfere with other operation levers, and can be disposed at a position where it can be easily operated, so that the operability of the plurality of operation levers as a whole is improved.

Hereinafter, embodiments of the present invention will be specifically described with reference to the drawings.
In FIG. 1, a tractor 1 includes a two-shaft, four-wheeled vehicle body 2, and the vehicle body 2 includes a pair of left and right front wheels 3 and a pair of left and right rear wheels 4. Although the four-wheel drive tractor 1 can be used here, the front wheel 3 can be connected to the power of the front wheel 3 for two-wheel drive.
The vehicle body 2 is configured by connecting a transmission case 7 to the rear part of the engine 5 via a clutch housing 6. The engine 5 and an engine accessory such as a radiator are covered with a bonnet 8 whose top plate can be freely opened and closed. It has been broken.

A hydraulic lifting device 10 having a pair of left and right lift arms 9 is mounted on the rear upper surface of the vehicle body 2, and a work machine (in this embodiment, via the lift arms 9 and the hydraulic lifting device 10). A rotary work machine 11 is detachably mounted on the tractor 1.
Further, as shown in FIG. 2, a plurality of (three in the present embodiment) auxiliary control valves 13 connected to the hydraulic control device of the working machine 11 are stacked and arranged on the upper portion of the hydraulic lifting device 10. Has been.
As shown in FIG. 1, a cabin 15 is provided between the hydraulic lifting apparatus 10 and the engine 5, and the cabin 15 of the present embodiment covers the pair of left and right rear wheels 4 from above to the front. A pair of left and right rear wheel fenders 16 (left rear wheel fender 16L, right rear wheel fender 16R), a pair of left and right front struts 18, a pair of left and right rear struts 19, and the front and rear struts 18 and 19, and A pair of left and right intermediate struts 20 rising from the rear wheel fender 16 approaching the rear strut 18 side, and a box-shaped ceiling portion 21 connecting the upper ends of these struts, is an independent mounting type (on the vehicle body 2). That is detachably mounted on the head).

2 and 3, the cabin 15 includes a bottom plate 22 that connects the lower end of the support column and the rear wheel fender 16 to form the bottom of the cabin 15. The floor sheet 23 provided with the flat part 23a stands up and is deployed.
Further, the rear wheel fender 16 has a rising portion 16a that is arranged to rise from the bottom plate 22, and a curved portion 16b that is bent and extended outward from the vehicle body 2 from the upper edge of the rising portion 16a. ing.
As shown in FIG. 3, the cabin 15 has a driver seat 26 disposed between the left and right rear wheel fenders 16 and above the floor seat 23, and the driver seat 26 and the right rear wheel fender 16R. And a control handle 28 provided in front of the driver's seat 26.

As shown in FIG. 2, the driver's seat 26 is provided on the flat portion 23 a of the floor seat 23 via a seat support 29.
As shown in FIGS. 3 and 4, the front portion of the control unit 27 is connected to the main transmission mechanism via a rod and a push-pull cable to operate the main transmission mechanism (not shown) of the vehicle body 2. Via a main transmission lever 31, an auxiliary transmission lever 32 connected to the auxiliary transmission mechanism via a rod for operating the auxiliary transmission mechanism (not shown) of the vehicle body 2, and a push-pull cable for manual accelerator operation. A hand accelerator lever 33 connected to an accelerator mechanism (not shown) of the vehicle body 2 and one or a plurality (in the present embodiment) connected to the auxiliary control valve 13 to remotely control the hydraulic equipment of the working machine 11 Are provided in a concentrated manner on the front side of the driver's seat 26 between the driver's seat 26 and the right rear wheel fender 16R.

  4 to 7, the PTO lever 36 is supported on the outer surface side of the right rear wheel fender 16R, and corresponding to the PTO lever 36, the right rear wheel fender 16R has a recessed portion 40 that is recessed outward in the left-right direction. Is provided. The PTO lever 36 includes a disk-shaped attachment base 37, a lever rod 38 protruding upward from the attachment base 37, and a gripping portion 39 provided at the upper end of the lever rod 38. The recessed portion 40 includes a bottom wall portion 41 that is inclined forward and outward toward the left and right direction, and a side wall portion 42 that rises upward from the left and right outer end portions of the bottom wall portion 41. An insertion window 43 is provided in the wall portion 41.

The grip portion 39 side of the PTO lever 36 is inserted through the insertion window 43 and is disposed inward in the left-right direction of the side wall portion 42, whereby the grip portion 39 side of the PTO lever 36 is placed on the right rear wheel fender 16 </ b> R (recess 40. ) And protrudes inward in the left-right direction of the right rear wheel fender 16R.
A side cover 47 is provided on the outer surface side of the right rear wheel fender 16R so as to cover the base side of the PTO lever 36 from the outside in the left-right direction, and between the side cover 47 and the right rear wheel fender 16R, A support member 48 that supports the base side of the lever 36 is provided.

The side cover 47 has a rectangular plate-shaped cover plate portion 50 on the center side in the front-rear direction and a pair of front and rear mounting plate portions 51 inclined inward in the left-right direction on both sides in the front-rear direction. The support member 48 is a rectangular plate-shaped support plate portion 53, a guide plate portion 54 bent outward in the left-right direction from the upper end of the support plate portion 53, and bent outward in the left-right direction from the lower end of the support plate portion 53. The connecting plate portion 55 and a pair of front and rear mounting portions 56 projecting outward in the left-right direction from both sides in the front-rear direction of the support plate portion 53 are provided.
A lever insertion window 58 is formed between the guide plate portion 54 of the support member 48 and the support plate portion 53, and a pair of front and rear engagements corresponding to the lever insertion window 58 are provided on both front and rear sides of the guide plate portion 54. Joint recesses 59 and 60 are formed.

A locking groove 61 is provided in the connecting plate portion 55 of the support member 48, and a screw shaft 65 provided at the end of the outer wire 64 of the Bowden wire 63 is inserted into the locking groove 61. The connecting plate 55 is clamped by a pair of nuts 66 that are screwed together, and the end of the outer wire 64 is fixed.
The mounting base 37 of the PTO lever 36 is supported by a mounting plate 69 of the support member 48 by mounting bolts 69 and nuts 70 so as to be swingable back and forth around the left and right axis (support shaft 69a of the mounting bolt 69). . That is, the attachment bolt 69 is fitted and fixed to the support plate portion 53 of the support member 48, the nut 70 is screwed to the attachment bolt 69, and the washer 71 is interposed between the attachment base portion 37 of the PTO lever 36 and the nut 70. The mounting base 37 is rotatably fitted to a support shaft 69a of the mounting bolt 69 between the washer 71 and the head 69b of the mounting bolt 69, so that the base side of the PTO lever 36 is attached to the mounting bolt 69a. 69 is supported so as to be swingable back and forth around a support shaft 69a.

  The lever rod 38 of the PTO lever 36 is made of an elastically deformable metal rod or the like, and in particular, the mounting plate 37 side of the lever rod 38 is formed in a small plate shape so as to be easily elastically deformed in the left-right direction. ing. Then, with the lever rod 38 elastically deformed inward in the left-right direction, the middle portion of the lever rod 38 of the PTO lever 36 is vertically inserted into the lever insertion window 58 of the guide plate portion 54, and the PTO lever 36 is moved to the front side. When the PTO lever 36 is swung back by engaging the engaging recess 59 with the restoring force of elastic deformation of the lever rod 38, the restoring force of elastic deformation of the lever rod 38 is operated. The engagement recess 60 is engaged.

A connecting portion 73 protrudes rearward from the mounting base 37 of the PTO lever 36, and an inner wire 74 of the Bowden wire 63 is connected to the connecting portion 73 via a U-shaped connecting body 75, so that the PTO lever 36 is The PTO lever 36 is connected to the control valve of the PTO clutch via the Bowden wire 63. By swinging the PTO lever 36 backward, the PTO clutch is turned off to stop the rotation of the PTO shaft, and the PTO lever 36 is moved forward. When the PTO clutch is turned on, the PTO clutch is turned on, and the rotational power is transmitted to the PTO shaft.
A pair of front and rear mounting stays 78 are provided on both the front and rear sides of the side cover 47 and the support member 48. Each mounting stay 78 has a fixed plate portion 79, a first mounting plate portion 81, and a second mounting plate portion 82, and the fixed plate portion 79 is fixed to the outer surface of the right rear wheel fender 26R by spot welding or the like. The mounting plate portion 51 of the side cover 47 is superposed on the first mounting plate portion 81 and fastened and fixed by bolts 84 and nuts 85, and the pair of left and right mounting portions 56 of the support member 48 are superposed on the second mounting plate portion 82. Thus, the side cover 47 and the support member 48 are fixed to the right rear wheel fender 16R by a pair of front and rear mounting stays 78. The nut 85 is fixed to the first mounting plate portion 81 by welding or the like, and the nut 88 is fixed to the mounting portion 56 by welding or the like.

The PTO lever 36 is located slightly outward in the left-right direction with respect to the main transmission lever 31, the auxiliary transmission lever 32, the hand accelerator lever 33, and the auxiliary control lever 34, and between the driver seat 26 and the right rear wheel fender 16R. The main transmission lever 31, the auxiliary transmission lever 32, the hand accelerator lever 33, and the auxiliary control lever 34 are arranged in front of the lever 36.
According to the above-described embodiment, the PTO lever 36 is supported on the outer surface side of the right rear wheel fender 16R, and the grip portion 39 side of the PTO lever 36 penetrates the right rear wheel fender 16R and the right rear wheel fender 16R. Since it protrudes inward in the left-right direction, even if the PTO lever 36 is arranged on the right front side of the driver seat 26, it is arranged close to the right rear wheel fender 16R and concentrated on the right front side of the driver seat 26. The plurality of operation levers (the main transmission lever 31, the sub transmission lever 32, the hand accelerator lever 33, and the auxiliary control lever 34) arranged to be arranged as far as possible can be arranged. Accordingly, the PTO lever 36 can be disposed on the right front side of the driver's seat 26 so that it can be easily operated, and can be disposed apart from the other plurality of operation levers. It can be easily operated without any interference with the operation lever. In addition, since the PTO lever 36 can be separated from the concentrated arrangement portion of the plurality of operation levers on the right front portion side of the driver seat 26, the degree of concentration of the operation levers on the right front portion side of the driver seat 26 can be relaxed. From this point, it becomes easy to operate other operation levers. Therefore, the PTO lever 36 can be separated so as not to interfere with other operation levers, and can be disposed at a position where it can be easily operated, so that the operability of the plurality of operation levers is improved as a whole.

  In the above-described embodiment, the PTO lever 36 is supported on the outer surface side of the rear wheel fender 16, and the grip portion 39 side of the PTO lever 36 penetrates the right rear wheel fender 16R so that the right and left sides of the right rear wheel fender 16R Although projecting inward in the direction, instead of the PTO lever 36, the main transmission lever 31, the auxiliary transmission lever 32, the hand accelerator lever 33 or the auxiliary control lever 34 is supported on the outer surface side of the right rear wheel fender 16R. The grip portion side of the operation lever may penetrate the right rear wheel fender 16R and protrude inward in the left-right direction of the right rear wheel fender 16R. Further, not only one PTO lever 36 but also a plurality of operation levers are supported on the outer surface side of the rear wheel fender 16, and the rear wheel fender 16 is penetrated through the rear wheel fender 16 on the rear wheel fender 16. You may make it protrude in the left-right direction inner side of the fender 16. FIG.

  Further, the operation lever such as the PTO lever 36 is supported on the outer surface side of the left rear wheel fender 16L in place of the right rear wheel fender 16R, and the grip portion side of the operation lever passes through the left rear wheel fender 16L. The left rear wheel fender 16L may protrude inward in the left-right direction. In this case, on the left side of the driver's seat 26, an operation lever such as the PTO lever 36 can be disposed on the front side of the driver's seat 26, which is an easy-to-operate place, and can be disposed apart from a plurality of other operation levers. The operation lever such as the PTO lever 36 can be easily operated without the possibility of interference with other operation levers. In addition, since the operation lever such as the PTO lever 36 can be separated from the concentrated arrangement portion of the plurality of operation levers on the front side of the driver seat 26, the concentration degree of the operation lever on the front side of the driver seat 26 is reduced. From this point, it is easy to operate other operation levers.

It is a left view of the tractor which shows one Embodiment of this invention. It is a side view which expands and shows the rear wheel of the tractor and its vicinity. It is a top view inside the cabin. It is a side view of the same control part. It is a side view of the PTO lever part. It is the sectional view on the AA line of the same FIG. It is the BB sectional view taken on the line of FIG.

Explanation of symbols

1 Tractor 16L Left rear wheel fender 16R Right rear wheel fender 26 Driver's seat 31 Main speed change lever 32 Sub speed change lever 33 Hand accelerator lever 34 Auxiliary control lever 36 PTO lever 39 Gripping part 40 Recessed part 41 Bottom wall part 42 Side wall part 43 Insertion window 47 Side cover 48 Support member

Claims (5)

In the tractor in which a driver's seat (26) is provided between the pair of left and right rear fenders (16), and a plurality of operation levers are provided between the driver's seat (26) and one of the rear wheel fenders (16).
At least one operation lever (36) is supported on the outer surface side of the rear wheel fender (16), and the grip (39) side of the operation lever (36) penetrates the rear wheel fender (16) to A tractor that protrudes inward in the left-right direction of the fender (16).   Corresponding to the first operating lever (36), the rear wheel fender (16) is provided with a recessed portion (40) recessed outward in the left-right direction, and the gripping portion (39) side of the operating lever (36) is 2. The tractor according to claim 1, wherein the tractor penetrates the recess (40) and protrudes inward in the left-right direction of the rear wheel fender (16).   The recessed portion (40) includes a bottom wall portion (41) that is inclined forward and upward toward the left and right direction outward, and a side wall portion (42) that stands upward from a left and right outer end portion of the bottom wall portion (41). And an insertion window (43) is provided in the bottom wall part (41) of the recess (40), and the gripping part (39) side of the first operating lever (36) is inserted into the insertion window (43). The tractor according to claim 2, wherein the tractor is disposed inward in the left-right direction of the side wall portion (42).   A side cover (47) is provided on the outer surface side of the one rear wheel fender (16) so as to cover the base side of the one operation lever (36) from the outside in the left-right direction, and the side cover (47 ) And one rear wheel fender (16), a support member (48) for supporting the base side of the one operation lever (47) is provided. Tractor.   The one operation lever (36) is a PTO lever, and a main transmission lever (31) is provided on the front side of the PTO lever (36) between the driver seat (26) and one rear wheel fender (16). A tractor comprising an auxiliary transmission lever (32), a hand accelerator lever (33), and an auxiliary control lever (34).

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