JP3927502B2 - Vehicle with crawler type traveling device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a vehicle provided with a crawler type traveling device.
[0002]
[Prior art]
Patent Document 1 discloses a semi-crawler tractor in which a crawler type traveling device (semi-crawler) is independently attached to the left and right instead of the rear wheel tire of a four-wheel drive tractor. This semi-crawler tractor has a vehicle body having a control part, and front wheels are provided on the left and right sides of the front part of the vehicle body, and crawler type traveling devices are provided on the left and right sides of the vehicle body instead of the rear wheels. It has been. The crawler type traveling device causes the tractor to travel forward and backward by circulating and rotating a crawler belt in the circumferential direction.
[0003]
[Patent Document 1]
Japanese Patent Laid-Open No. 11-321729 (FIG. 1)
[0004]
[Problems to be solved by the invention]
However, in the tractor (vehicle) provided with the crawler type traveling device, the upper part of the crawler belt exists at a position away from the upper part of the rear wheel fender at the rear of the vehicle body, and the rear wheel fender as viewed from the driver's seat. It was supposed to be placed in the blind spot.
Therefore, when the vehicle is brought closer to the shore, for example, the position of the outer side edge of the crawler belt in the left-right direction is visually confirmed from the driver's seat, the view is obstructed by the rear wheel fender, and the position confirmation is difficult. .
[0005]
In view of such circumstances, an object of the present invention is to provide a vehicle including a crawler type traveling device that allows an operator to easily check the position of the crawler belt in the left-right direction.
[0006]
[Means for Solving the Problems]
The first specific means for solving the problems in the present invention includes: a vehicle body having a control unit capable of getting on and off from the entrance, a front wheel at the front of the vehicle body, a crawler type traveling device at the rear of the vehicle body, and a lower part of the entrance and exit. And a boarding / alighting means provided with at least one step member on the provided support body, and the step member has a position confirmation portion for confirming the position of the crawler belt in the left-right direction of the crawler type traveling device. It is.
Thereby, the operator can easily confirm the position of the crawler belt in the left-right direction by the position confirmation unit provided in the step member of the getting-on / off means.
[0007]
According to a second specific means for solving the problem in the present invention, the position confirmation portion is set on an extension line passing through the center in the left-right direction of the crawler belt, on an extension line of the outer edge of the crawler belt, or in the vicinity thereof. It is.
As a result, the position confirmation part of the step member is arranged on the extension line passing through the center in the horizontal direction of the crawler belt, on the extension line of the outer edge of the crawler belt, or in the vicinity thereof, and the operator confirms the position confirmation part. By doing so, it becomes possible to easily detect the center position of the crawler belt in the left-right direction and the position of the outer edge in the left-right direction.
[0008]
A third specific means for solving the problem in the present invention is that the position confirmation portion is a substantially central portion in the left-right direction of the step member or an outer edge in the left-right direction.
Thereby, the easily recognizable place such as the center part or the outer edge of the step member can be used as the position confirmation part.
According to a fourth specific means for solving the problems in the present invention, the crawler belt of the crawler type traveling device is stretched in a substantially triangular shape in a side view, and the support body is obliquely forward and downward from the lower part of the entrance / exit. A plurality of step members are provided along the longitudinal direction of the support, and these step members are arranged above the front part of the crawler belt, and a position confirmation part is set at least on the step member at the lowest position. It is that.
[0009]
As a result, the getting-on / off means is disposed in front of the crawler traveling device, so that the circulation of the crawler belt is not hindered. In addition, since the step member at the lowest position has a position confirmation portion and is disposed at a position corresponding to the crawler belt, it is possible to prevent the getting-on / off means from protruding greatly outward in the left-right direction.
According to a fifth specific means for solving the problems in the present invention, the vehicle body has a cabin having a control portion at an upper portion thereof, a door is provided at a passenger entrance of the cabin side portion, and the lower portion of the door is transmitted. The position confirmation part is made visible.
[0010]
Thus, the operator can visually confirm the position confirmation portion through the lower portion of the door without going out of the cabin.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
In this embodiment, as shown in FIGS. 1-3, the agricultural tractor 1 is illustrated as a vehicle provided with the crawler type traveling apparatus.
This tractor 1 is a semi-crawler tractor in which a crawler type traveling device 2 (semi-crawler) is independently provided on the left and right instead of the rear wheel of a four-wheel drive tractor. It is used.
[0012]
A cabin 5 having a control unit 4 is provided at the upper part of the vehicle body 3 of the tractor 1, and a boarding / unloading means 7 is provided at the lower part of the cabin 6. A front wheel 8 is provided at the front and a crawler belt 9 is provided at the rear. A crawler type traveling device 2 is provided that enables the vehicle body 3 to travel by circulating in the direction.
Specifically, an engine 12 is mounted on the front part of the vehicle body 3, and a power transmission case 13 is attached to the rear part via a flywheel housing. The power transmission case 13 is connected to the clutch housing, the transmission case, and the like. It is configured.
[0013]
The front wheels 8 are provided on the left and right sides of a front axle case 16 that is supported by the front axle frame 14 and protrudes in the left-right direction, and serves as steering wheels.
The crawler type traveling device 2 provided at the rear wheel position is attached to the rear end side of the power transmission case 13 on the outer side in the left-right direction of the rear axle case 15 provided in a protruding manner in the left-right direction.
As shown in FIG. 1, the crawler type traveling device 2 includes a single sprocket 17, a pair of front and rear idlers 18, a plurality of wheels 19, and the sprocket 17, the idler 18, and the wheels 19. A crawler belt 9 wound in a triangular shape, a track frame 20, and a transmission case 21 (gear case) are provided. By rotating the sprocket 17, the crawler belt 9 is circulated in the circumferential direction. Thus, the vehicle is configured to travel.
[0014]
More specifically, the track frame 20 is formed of a rectangular cylindrical body and arranged along the front-rear direction, and the idler 18 and the wheels 19 are supported on the track frame 20.
The idler 18 is disposed before and after the track frame 20, and in particular, the front idler 18 is connected to the track frame 20 via a tension adjusting device 43 that adjusts the tension of the crawler belt 9. The tension adjustment device 43 adjusts the tension of the crawler belt 9 by putting the idler 18 in and out.
[0015]
One end of a swing arm 44 is rotatably fixed to the side wall of the tension adjusting device 43, and the other end is rotatably connected to a support portion 25 described later via an urging means 45 such as a compression spring. Yes. Furthermore, a guide ring 46 is provided in the middle of the swing arm 44 on the inner peripheral side of the crawler belt 9, and the guide ring 46 is pressed against the crawler belt 9 side by the urging force of the urging means 45. It is like that.
By pressing the guide wheel 46 against the crawler belt 9, the crawler belt 9 can be prevented from being bent and its position in the left-right direction can be regulated (prevented from coming off).
[0016]
The wheel 19 is disposed below the track frame 20 in the front-rear direction.
The sprocket 17 is disposed above the track frame 20 and above the midway between the front and rear idlers 18 and is fixed to the transmission shaft 26, and the transmission shaft 26 is rotatably supported by the transmission case 21. The transmission case 21 is fixedly attached to the left and right outer end sides of the rear axle case 15 at the rear of the vehicle body.
A support portion 25 is provided at the lower portion of the transmission case 21, and a swing shaft 22 is supported on the support portion 25 so as to be rotatable about a horizontal axis. A frame 20 is attached, and the track frame 20 is supported together with the idler 18 and the wheel 19 so as to be swingable around the axis of the swing shaft 22.
[0017]
The crawler belt 9 is formed in an endless belt shape with rubber, and a rubber driving projection 23 is provided on the inner peripheral side, and a rubber grounding lug 24 is provided on the outer peripheral side at appropriate intervals in the circumferential direction. It has been. The ground lug 24 is disposed substantially corresponding to the drive protrusion 23.
The driving protrusion 23 engages with the sprocket 17 in the circumferential direction and receives a driving force from the sprocket 17, and engages with the wheel 19, the sprocket 17 and the idler 18 in the left-right direction to prevent wheel removal. And a function of preventing the crawler belt 9 from coming off.
[0018]
On the other hand, a cabin 5 is mounted on the rear and upper part of the vehicle body 3, a steering section 4 provided with a steering handle 27 and the like is provided in the front of the cabin 5, and a driver's seat 28 is provided in the rear. On the left and right sides of the cabin 5 are formed entrances 6 for a driver to enter and exit the cabin 5 and doors 29 that can be opened and closed.
A transparent body 31 such as reinforced plastic is fitted into the frame body 30 so that the door 29 can be seen from the outside of the cabin 5, and the frame body 30 has a vertical axis at the approximate center of the side of the cabin 5 via a hinge. It is configured to be supported so that it can rotate freely. Therefore, the door 29 is of a type that opens forward.
[0019]
A boarding / unloading means 7 for facilitating boarding / alighting on the cabin 5 is provided below the left boarding entrance 6.
The getting-on / off means 7 has one rod-like support body 34 composed of a square pipe or the like, and at least one step member 36 provided on the support body 34. The support body 34 is disposed so as to be inclined and protrude downward in a direction away from the vehicle body 3 forward from the mounting bracket 33.
That is, a mounting bracket 33 extending downward is fixed to the lower frame 32 constituting the cabin 5 immediately below the entrance 6 on the left side of the cabin 5, and a mounting piece is attached to the base end (upper end) of the support 34. 35 is fixed, and the vehicle body 3 and the support 34 are fixed by attaching the mounting piece 35 to the mounting bracket 33 with a bolt or the like.
[0020]
Step members 36a and 36b each having a size on which a foot can be placed are fixed to the middle portion and the front end portion (lower end portion) of the support body 34 by welding or the like. The step members 36a and 36b are substantially rectangular plate-like in plan view, and have a grating structure composed of a plurality of elongated vertical frames and horizontal frames, so that the upper surface thereof has a step surface 37 on which a foot can be placed. It has become.
As shown in FIG. 2, the support 34 is fixed to the vehicle body 3 in a direction extending outward in the left-right direction, but the edges of the step members 36a, 36b are attached to the support 34 so as to face in the front-rear direction and the left-right direction. It is fixed.
[0021]
Using the step surfaces 37 of the plurality of step members 36a and 36b as a stepping platform, the driver can go up to the entrance 6 and get on and off the vehicle very easily. Further, as described above, the boarding / exiting means 7 protrudes from the lower part of the boarding / exiting opening 6 to the front outer side. Therefore, the boarding / exiting means 7 is located above the front part of the crawler belt 9 so as not to prevent the crawler belt 9 from circulating. In addition, the operator H can get on and off using both the getting-on / off means 7 and the outer peripheral side of the crawler belt 9.
Further, the central portion 38 of the lower end side step member 36 a attached to the lowermost position of the support 34 is substantially disposed on an extension of the line C passing through the center in the left-right direction of the crawler belt 9. Accordingly, the central portion 38 serves as a position confirmation portion 39 for confirming the position of the crawler belt 9 in the left-right direction, particularly the position of the outer edge 10.
[0022]
The operator H in the cabin 5 visually confirms the position confirmation unit 39 through the lower part of the door 29, the front lower part of the cabin 5, and the like (line of sight G in FIGS. 1 to 3), so that the outer edge of the crawler belt 9 can be obtained. 10 can be recognized.
That is, in the illustrated tractor 1, as shown in FIG. 1, the crawler type traveling device 2 is disposed on the lower side of the vehicle body 3, and the upper part of the crawler belt 9 is located away from the upper part of the rear wheel fender 41. In the blind spot of the rear fender 41 when viewed from the driver's seat 28.
[0023]
Therefore, for example, when the tractor 1 is brought close to the shore R in order to dig a groove in the vicinity of the shore R, the position of the crawler belt 9 with respect to the shore R may be visually confirmed from the driver seat 28. The visibility is blocked by the rear wheel fender 41, making it difficult to confirm the position (see FIG. 3).
Therefore, if the position confirmation part 39 of the lower end side step member 36a which is in a positional relationship corresponding to the crawler belt 9 is visually checked, the position can be known without directly looking at the crawler belt 9. Since the lower end side step member 36a is located on the left front side when viewed from the driver's seat 28, it can be visually confirmed through the lower portion of the left door 29 or the lower left portion of the transparent cabin front.
[0024]
The position confirmation of the crawler belt 9 via the position confirmation unit 39 is particularly effective in a situation where the tractor 1 is moved forward while moving backward.
In order to facilitate visual confirmation, it is preferable to draw a line in the front-rear direction at the center of the lower end side step member 36a.
As a second embodiment of the vehicle according to the present invention, the getting-on / off means 7 may be as shown by a two-dot chain line in FIG. That is, the laterally outer edge 40 of the lower end side step member 36a may be used as the position confirmation portion 39, and may be disposed substantially the same as the extension line E of the laterally outer edge 10 of the crawler belt 9. By doing so, the outer edge 40 of the lower end side step member 36a substantially coincides with the crawler belt outer edge 10, and the outer edge 10 can be recognized more accurately.
[0025]
The configuration other than the getting-on / off means 7 is substantially the same as that of the first embodiment.
As a third embodiment of the vehicle according to the present invention, the getting-on / off means 7 may be as shown in FIG. That is, three step members 36a, 36b, 36b are attached to the support 34. Thereby, the operator H can reach the cabin entrance 6 more easily.
In this case, the lower end side step member 36a can use either the central portion 38 or the laterally outer edge 40 as the position confirmation portion 39. FIG. 6 shows the position of the central portion 38 of the lower end side step portion. The confirmation part 39 is shown as being arranged on an extension line C passing through the center part 38 of the crawler belt 9.
[0026]
The configuration other than the getting on / off means 7 is substantially the same as that of the first embodiment.
In addition, this invention is not limited to the said embodiment, A various deformation | transformation can be carried out.
That is, the position confirmation unit 39 is not limited to the one provided on the lower end side step member 36 a provided at the lowermost end of the support body 34, and other step members, for example, the midway step member 36 b correspond to the crawler belt 9. You may do it. There is no problem even if the position confirmation unit 39 is arranged in the vicinity of the extension line C passing through the center of the crawler belt 9 in the left-right direction and the extension line E of the outer edge 10.
[0027]
Further, the support 34 may be provided so as to protrude substantially laterally outside as long as it does not prevent the crawler belt 9 from circulating, and a plurality of supports 34 may be provided to increase the strength and the like.
Further, the planar shape of the step members 36a and 36b may be an arbitrary shape as long as the foot can be placed thereon. It is not always necessary to have a grating structure, and it may be formed of a single plate material.
The getting-on / off means 7 having the position confirmation part 39 may be provided at the lower part of the entrance / exit 6 on the right side of the cabin 5. In this case, it is effective when the tractor 1 is right-justified. There is no problem even if the boarding and unloading means 7 are respectively provided at the lower part of the boarding gate 6 on both sides of the cabin 5.
[0028]
【The invention's effect】
According to the present invention, the operator H can easily confirm the position of the crawler belt 9 in the left-right direction by visually confirming the position confirmation unit 39 provided on the step members 36a and 36b.
[Brief description of the drawings]
FIG. 1 is a right side view of a tractor having a first embodiment of boarding / exiting means.
FIG. 2 is a plan view of a tractor having the first or second embodiment of the getting on / off means.
FIG. 3 is a front view of a tractor having the first embodiment of the boarding / exiting means.
FIG. 4 is an enlarged right side view of the first embodiment of the getting on / off means.
FIG. 5 is an enlarged rear view of the first embodiment of the getting on / off means.
FIG. 6 is an enlarged rear view of a third embodiment of the getting on / off means.
[Explanation of symbols]
2 Crawler type traveling device 3 Car body 4 Steering part 5 Cabin 6 Entrance / exit 7 Entrance / exit means 8 Front wheel 9 Crawler belt 10 Outer edge 29 (of crawler belt) Door 34 Support body 36 Step member 39 Position confirmation part 40 Outside (step member) Edge C Extension line passing through the center of the crawler belt in the left-right direction E Extension line of the outer edge of the crawler belt

Claims (4)

A vehicle body (3) capable of getting on and off from the entrance / exit (6) and having a driver's seat (28) , a front wheel (8) at the front of the vehicle body, a crawler type traveling device (2) at the rear of the vehicle, and an entrance / exit (6) Boarding means (7) provided with at least one step member (36) on a support body (34) provided below
The upper part of the crawler belt (9) of the crawler type traveling device (2) is located downward from the upper part of the rear wheel fender (41) at the rear of the vehicle body,
The step member (36) protrudes from the lower part of the entrance / exit (6) to the front lower side and to the outer side in the left-right direction and is positioned above the front part of the crawler belt (9). have a position confirmation unit for performing visual confirmation from the driver's seat (28) (39),
The position confirmation part (39) is set on an extension line (C) passing through the center in the left-right direction of the crawler belt (9) or on an extension line (E) of the outer edge (10) of the crawler belt (9). A vehicle equipped with a crawler type traveling device. The position confirmation section (39) is provided with a crawler type traveling device according to claim 1, the left-right direction substantially central portion (38) or the left-right direction outer edge (40) Der characterized Rukoto step member (36) Vehicle. The crawler belt (9) of the crawler type traveling device (2) is stretched in a substantially triangular shape when viewed from the side, and the support (34) is protruded obliquely forward and downward from the lower part of the entrance / exit (6). A plurality of step members (36) are provided along the longitudinal direction of the support (34), and these step members (36) are arranged above the front part of the crawler belt (9). vehicle equipped with a crawler type traveling device according to claim 1 or 2, characterized that you have to set the position confirmation section (39) to a member (36a). The vehicle body (3) has a cabin (5) provided with a control part (4) and a driver's seat (28) in the upper part, and a door (29) is provided at the entrance (6) on the side of the cabin (5). The crawler type according to any one of claims 1 to 3, wherein the position confirmation part (39) is visible from a driver seat (28) through a lower part of the door (29). A vehicle equipped with a traveling device.

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