JPS63149272A - Off-road vehicle - Google Patents

Abstract

PURPOSE:To make it possible to run a vehicle on an excessively dirt off-road area, which vehicle provided in the front and rear section thereof with running means each composed of a plurality of wheels attached at equal intervals on a support frame, by journalling the intermediate section of each support frame to the body, swingably in the longitudinal direction. CONSTITUTION:Front running means 5, 6 and rear running means 15, 15 are are provided in the front and rear sections of a body 1 of a running vehicle. Each front running means 5, 6 (which are similar to rear running means 15, 16, and therefore, the explanation to the rear one is omitted), is composed of two left wheels 2a, 2b and two right wheels 3a, 3b which are arranged with suitable spaces therebetween, and are coupled with each other through the intermediary of support frames 7, 6 having intermediary sections which are coupled to the body 1, swingably in the longitudinal direction, through the intermediary of support shafts 10, 11. Further, the drive power from a hydraulic motor 23 provided on the support frame 7 is transmitted through transmission links 31, 32 to the wheels 2a, 2b, 3a, 3b which are therefore rotated.

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention relates to an uneven terrain vehicle used in agriculture, forestry, mining, snow, civil engineering construction sites, etc. It is possible to drive at high speeds, and in addition, it is possible to obtain sufficient traction force and stable running performance.

(Prior art) Conventionally, as mentioned above, the rough terrain vehicles used in agriculture, forestry, mining, snow, civil engineering work sites, etc. include general vehicles, as well as crawlers and other vehicles with a large ground contact area and sufficient traction power. Vehicles with tracked tracks were used.

(Problems to be Solved by the Invention) However, the above-mentioned rough terrain vehicle having the endless track belt cannot always be said to have perfect ground contact on rough terrain, and may not be able to exert sufficient traction force.

For example, when moving from an uphill slope to a downhill slope, a frontal floating causes a rearward lifting and the body tilting phenomenon becomes noticeable. As a result, the ground contact area becomes smaller, the traction force becomes smaller, and the riding comfort deteriorates significantly. Conversely, when moving from a downhill slope to an uphill slope, only the front and rear ends of the vehicle touch the ground, leaving the middle part floating in the air, reducing the ground contact area, and also causing the body to tilt significantly, resulting in poor ride comfort. .

In addition, general vehicles do not have sufficient ground contact force and traction force compared to tracked bundles, and there is a natural limit to their use on rough terrain.Furthermore, like tracked bundles, the body tilting phenomenon occurs. It was remarkable.

(Means for Solving the Problems) Therefore, in order to solve the above problems, the present invention includes a body,
The above-mentioned traveling vehicle is equipped with a plurality of wheels connected to each other by a support frame at appropriate intervals, or a plurality of traveling means constituted by a track belt attached around the support frame. The intermediate portion of the support frame of the means is connected to the front and rear portions of the body so as to be swingable back and forth.

(Operation and Effect) Since the plurality of wheels or the endless track belt of the traveling means can swing back and forth independently at the front and rear parts of the body through the support frame, each of the plurality of wheels or the endless track belt can It moves up and down freely according to the irregularities of the uneven ground and always remains in contact with the ground, and each of the multiple wheels or part of the endless track belt does not float or jump up, providing sufficient traction and stability. This is something that can change the way you drive. Furthermore, since the tilting phenomenon of the body is alleviated, riding comfort can also be improved.

(Example) Hereinafter, an example of the present invention will be described based on the drawings. 1 to 5 are diagrams showing a first embodiment of an all-terrain vehicle according to the present invention.

In Figure 1.2, 1 is a body, and this body 1
Front traveling means 5 and 6 having front left wheels 2a, 2b and front right wheels 3a, 3b, respectively, are connected to the front part (left part in the figure) of the vehicle. Forward traveling means 5 and 6
The two front left wheels 2a and 2b and the front right wheels 3a and 3b, which are arranged at an appropriate distance from each other, are connected by support frames 7 and 8, respectively, and these support frames 7 and 8 The intermediate portion of is connected to the body 1 via support shafts 10 and 11 so as to be swingable back and forth. Rear traveling means 15 and 16 having rear left wheels 12a, 12b and rear right wheels 13a, 13b, respectively, are connected to the rear portion (right side in the figure) of the body 1. The rear traveling means 15 and 16 respectively connect two rear left wheels 12a and 12b1 and rear right wheels 13a and 13b, which are arranged at an appropriate distance from each other, with support frames 17 and 18. The intermediate portions of the support frames 17 and 18 are connected to the body 1 via support shafts 20 and 21 so as to be swingable back and forth. A hydraulic motor is provided on the opposite side of the support frame 7 between the front left wheels 2a and 2b, and this hydraulic motor 23 rotates the front left wheels 2a and 2b via a transmission link 31, and a chain or the like is wound around the hydraulic motor 23. It can be driven.

Similarly, the hydraulic motors 24 to 26 are connected to the front right wheels 3a, 3b, the rear left wheels 12a, 12b, and the rear right wheels 13a, 1 through transmission links 32 to 34, respectively.
3b can be rotated. The hydraulic motors 23, 25 are controlled by the same pump 36, and the front left wheels 2a, 2b and the rear left wheels 12a, 12b are driven at the same rotation speed. And hydraulic motor 24.26
are controlled by the same pump 37, and the front right wheels 3a,
3b and the rear right wheels 13a, 13b are driven at the same rotation speed. Pumps 36 and 37 are powered by the same engine 39
The discharge amount of the pump 36 is adjusted by a handle 40, and the discharge amount of the pump 37 is adjusted by a handle 41.

As shown in FIG. 3, the handle 40 is placed on the right side of the figure (left side for the driver), and the handle 41 is placed on the left side of the figure (right side for the driver) as shown in the same figure. That is, when the driver operates the handle 40, the front left wheels 2a, 2b and the rear left wheels 12a, 1
By controlling the rotation speed of the wheel 2b and adjusting the handle 41, the front right wheels 3a, 3b and the rear right wheels 13a, 1
3b can be controlled. A hydraulic cylinder 45 for tilting the loading platform 43 as shown by a two-dot chain line is provided in the center of the body l, and this hydraulic cylinder 45 is connected to a pump 38 driven by an engine 39 like the pumps 36 and r. is connected to.

A switching valve 47 is interposed between the hydraulic cylinder 45 and the pump 38, and the switching pulp 47 can be switched by a switching handle 48.

In such an all-terrain vehicle, after driving the engine 39, the pumps 36 and 3 are operated by operating the handles 40 and 41.
Hydraulic motor 23.24.25 by actuating 7
．． 26 is driven, and the winding is further carried out by the transmission link 31.
32, 33, 34, the front left wheels 28% 2b%, the front right wheels 3a, 3b, the rear left wheels 12a, 12b, and the rear right wheels 13a, 13b are rotated and the vehicle travels.

When steering an all-terrain vehicle, the hydraulic motors n, 25, and Hydraulic motor 24.26ρThe number of rotations of one side is higher than the number of rotations of the other, and the left wheels 2a, 2b are
, 22a, 12b and right wheels 3a, 3b, 13a, 1
Steering in a desired direction is achieved by increasing the number of rotations of one of the wheels 3b than the other.

When such an off-road vehicle travels on level ground, as shown in FIG.
does not sway before 1jJe. However, when traveling on rough terrain with severe unevenness, for example, when moving from an upward slope X to a downward slope Y as shown in FIG. 4, the support frame 7.8 of the forward traveling means 5.6 is 10.11, the front left wheels 2a, 2b and the front right wheels 3a, 3b move up and down, respectively, and touch the ground together, and furthermore, the support frames I7.
18 swings forward via the support shaft 20.21, the rear left wheels 12a, 12b and the rear right wheel 13a,
13b also move up and down, respectively, and both touch the ground. Unlike conventional tracked vehicles, the vehicle does not float forward or bounce backward. Therefore, sufficient traction force can be obtained and stable running performance can be obtained.

Furthermore, as shown in FIG. 5, when the front wheels run onto the uneven terrain protrusion Z, even if the wheels 2a and 3a ride on the uneven terrain protrusion 2, the wheels 2b and 3b still touch the flat area P. ing. For this reason, the wheels 2b and 3b that are in contact with the flat part P are affected by the grounding force of the wheels 2a and 3a that have run onto the uneven ground convex part Z.
assist in pushing up. Similarly, when the rear wheels 12a, 13a ride on the rough terrain convex part Z, the wheels 12b,
13b assists in pushing up the wheels 12a and 13a with its ground contact force. In this way, the off-road vehicle according to the present invention can get over the off-road protrusion 2 more easily than before.

Furthermore, as shown in FIG. 5, even if the front wheels 2a, 3a ride on the rough terrain convex part Z, the front part of the body 1 will not be suddenly lifted up. That is, in this case wheel 2
Since wheels b and 3b are in contact with the flat ground P, the front part of the body 1 can only be lifted up to half the height of the height at which the wheels 2a and 3a ride on the uneven ground protrusion 2. However, if the wheels 2b and 3b also ride up to the same height as 2a and 3a, the front part of the body 1 will also be lifted up by the same height, but until the wheels 2b and 3b are in the prone position, the body 1 will be gradually lowered than before. It will be lifted up. Therefore, the sudden tilting phenomenon of the body 1 can be alleviated, and the riding comfort can be improved.

Although hydraulic drive means is used in the first embodiment, mechanical or electric drive means may also be used.

FIG. 6 shows a second embodiment of the invention. In the first embodiment, the forward traveling means 5.6 and the rear traveling means 1
5.16 is one in which two wheels are connected by a support frame, but in this second embodiment, the forward traveling means 55 and the rear traveling means 56 each have endless tracks such as crawlers around the supporting frames 57 and 58. It is equipped with belts 52 and 53. The support frame 57 of the front traveling means 55 is connected to the front part of the body 1 by a support shaft 61 so as to be swingable back and forth, and the support frame 58 of the rear travel means 56 is connected to the rear part of the body 1 by a support shaft 62 so as to be swingable back and forth. Connected for free movement. Sprockets 64 and 65 are provided at both front and rear ends of the support frame 57 so as to be driven simultaneously by one hydraulic motor, and a plurality of guide rollers 67 are rotatably provided at the lower side of the support frame 57. Sprocket 64.65 and guide roller 6
7 are each wrapped with one endless track band 52.

The rear traveling means 56 also has a similar structure. As the sprockets 64 and 65 rotate, the track belt 52 is guided by the guide rollers 67 and comes into contact with the ground one after another, so that the all-terrain vehicle can travel.

The off-road vehicle according to the second embodiment also has the same characteristics as the first embodiment.
Similar to the embodiment, the endless track belts 52 and 53 move up and down freely according to the irregularities of the rough ground and are always in contact with the ground, and a part of the crawler does not float or jump up like in a conventional crawler vehicle. Therefore, sufficient traction force and stable running can be obtained, and the tilting phenomenon of the body 1 can be alleviated, so that riding comfort can be improved.

FIG. 7 shows a third embodiment of the present invention. In the first embodiment, the wheels 2a, 2b, 3a, 3b, 12a,
12b, 13a, 13b were all in direct contact with the ground, but in this third embodiment, these wheels are separated for each traveling means 5, 6, 15, 16 and equipped with endless rollers such as crawlers. Orbital zone 70.71.72.7
3 is installed. Installation of endless track belt 70, etc.
As shown in FIG. 8, each wheel 2a, etc. is made into a double tire, and the wheels provided inside the body 1 are first attached, and then the endless track belt 70 is fitted onto the wheels from the side of the body 1, and then the wheels are attached to the inside of the body 1. 1. This is done by attaching wheels provided on the outside and sandwiching the inner protrusion 70a of the endless track band 70 between the two wheels.

According to this third embodiment, by attaching crawlers or the like directly to the wheels, the ground pressure per unit area is lowered, making it possible to run on wetlands, snowy roads, etc., and even in such soft places. The same effects as in the first embodiment can be obtained. In addition, in the track belt bundle having the structure as in the second embodiment, when traveling on level ground, the ride quality is very poor due to poor cushioning properties, but according to the third embodiment, the wheel The tires exhibit cushioning properties,
Even in such a case, riding comfort does not deteriorate. Furthermore, in a bundle using a track belt having a structure like the second embodiment, if the track belt is cut, it becomes impossible to run, but in this third embodiment, even if the track belt is cut, it cannot run. The inner wheels have driving force, so they will never become unable to run.

In the third embodiment, the endless track belt is mounted by sandwiching its inner protrusion between the double tires, but other methods may be used. For example, protrusions and recesses of various shapes are provided on the outer circumference of tires to increase their driving force.Protrusions that fit into the recesses of the tire are provided inside the track belt, and The endless track belt may be attached around the tire (wheel) by fitting the tire into the recess of the tire. In this way, the outer peripheral protrusion of the tire can serve as a sprocket to rotate the endless track belt, and the wheels do not necessarily have to be double tires. In particular, since the front and rear wheels of one traveling means are rotated synchronously by one drive source such as a hydraulic motor, the endless track belt can be rotated easily and reliably. In addition, when installing the endless track belt,
All you have to do is to fit the respective protrusions and recesses with the tire deflated, and then inflate it.

FIG. 9 shows a fourth embodiment of the present invention. In this fourth embodiment, a directional switching valve 75 is provided between the pump 36 and the hydraulic motor 23, the same valve 76 is provided between the pump 37 and the hydraulic motor 24, and the same valve is provided between the pump 36 and the hydraulic motor 25. 77, and the same valve 78 is interposed between the pump 37 and the hydraulic motor 26. The directional control valves 75, 76, 77, and 78 have a structure as shown in Fig. 10, and they are shown in Fig. 10 (al, ('b), (
It is switched to each position as shown in C). When the directional control valves 75, 76, 77, and 78 are all in the positions shown in the same figure (aJ), the rough terrain vehicle is traveling forward, and when they are all in the positions shown in the same figure (C), the rough terrain vehicle is traveling forward. Furthermore, when the directional control valves 75 and 76 are in the positions shown in the same figure (in the position shown in al, and the directional control valves 77 and 78 are in the same figure), the discharge from the pump 36 and 37 is All of the oil supplied to the hydraulic motors 24 and 26 is supplied to the hydraulic motors 26, so the amount of oil supplied is doubled. 24 can be doubled, and the speed of the all-terrain vehicle is doubled.At this time, the oil in the hydraulic motor 5.26 is only circulated and the rear left wheel 12
a, 12b, and the rear right wheels 13a, 13b are made to spin idly.

In this case, the driving force is transmitted only to the wheels of the forward running means 5.6, which is similar to the part-time running of a four-wheel drive system. Also, during this part-time operation, pump 3
By changing the rotational speed of the hydraulic motors 23, 24 by changing the discharge amount of the hydraulic motors 23, 24, the all-terrain vehicle can be steered using only the wheels of the forward traveling means 5 and 6, thereby improving the steering performance. Furthermore, during this part-time driving, the vehicle speed of the off-road vehicle can be twice that of full-time driving, as mentioned above, so part-time driving is when driving on level ground where the off-road vehicle is simply moved. Are suitable.

FIG. 11 shows a fifth embodiment of the present invention. In this fifth embodiment, the body 1 is separated into a front part 1a and a rear part 1b, and these parts are connected by a joint pin 80. It is designed to be able to rotate (rolling motion) around an axis extending in the front-rear direction.

According to the fifth embodiment, even if the rough terrain convex portion Z is located only on either the left or right side, all the wheels can always be in contact with the ground, so that even more sufficient traction force and stable running can be obtained.

FIG. 12 shows a sixth embodiment of the present invention. In this sixth embodiment, the body 1 is separated into a front part 1a and a rear part 1b, as in the fifth embodiment.
and the rear part 1b are connected by a joint pin 8 whose axis is in the vertical direction of the vehicle (perpendicular to the plane of the paper in the figure), and the front part 1a and the rear part 1b are connected via a joint pin 81 in the horizontal plane of the vehicle (on the plane of the paper in the figure). It is possible to bend it.

Hydraulic cylinders 46 are provided in the front part 1a and the rear part 1b, respectively.
Both ends are fixed, and the front part 1a and the rear part 1b can be bent by extending and contracting the hydraulic cylinder 46, whereby the all-terrain vehicle is steered in a desired direction. According to the sixth embodiment, the turning radius can be made smaller than when steering is performed by changing the left and right wheel rotational speeds, and the steering performance can be improved.

FIG. 13 shows a seventh embodiment of the invention. In this seventh embodiment, the front traveling means 5 and 6 are connected by an axle 83, and this axle 83 is connected to a pin 85 provided in the vertical direction of the vehicle.
It is connected to the body 1 so as to be rotatable within the horizontal plane of the vehicle. Further, an inner gear 87 is provided in the center of the axle 83 concentrically with the pin 85.
7 is engaged with a pinion spool that is integrally provided at the lower end of a steering shaft (not shown) on which a steering wheel 88 is provided. In this seventh embodiment, by rotating the steering wheel 88, the inner gear 87 is rotated via the binion 90,
This makes it possible to rotate the axle frame, ie, the front drive means 5.6, about the pin 85 to effect steering of the off-road vehicle. According to the seventh embodiment, similarly to the sixth embodiment, the turning radius can be reduced and the steering performance can be improved.

FIG. 14 shows an eighth embodiment of the present invention. This eighth embodiment has a front traveling means 5. connected to the front part of the body l.
The support shaft 100.6 defines the back-and-forth swing fulcrum of the support frame 7.8.
101 is arranged to be offset toward the rear side of the body 1 with respect to the center point of the support frame 7.8.

A rear traveling means 1 connected to the rear part of the body 1
The support shafts 103 and 104 that define the back-and-forth swing support points of the support frames 17 and 18 shown in FIG. That is,
The ratio a:b of the wheel spacing that determines the positions of the support shafts 100, 101, and 103, 104 is determined, for example, to be 2:1. Therefore, twice as much load is applied to the wheels 2b, 3b and 12a, 13a as to the wheels 2a, 3a and 12b, 13b. Thereby, the steering performance of the off-road vehicle can be improved. This is because, as shown in FIG. 15, when an attempt is made to steer the rough terrain vehicle to the left by increasing the rotation speed of the right wheel than the left wheel, the wheels 2b and 12a at the middle of the vehicle will move along the steering trajectory. However, since the wheels 2a and 12b at the front and rear ends of the vehicle slip by d from the steering trajectory S, the frictional force acting on the axles 2a and 12b acts as a load and acts as steering resistance. Because it works. From this point, as in this eighth embodiment, the wheel 2a
, 12b is 1/2 that of the wheels 2b, 12a, the frictional force is also 1/2, the steering resistance is also reduced, and the steering performance can be improved. Further, according to the eighth embodiment, since the load applied to the wheels 2a is smaller than that of the wheels 2b, the shock from the road surface when the wheels 2a ride on the rough terrain convex part Z can be reduced, and the ride quality is increased accordingly. can also be improved.

[Brief explanation of the drawing]

1 to 5 are diagrams showing a first embodiment of the all-terrain vehicle according to the present invention, in which FIG. 1 is a side view thereof, FIG. 2 is a drive system diagram in a plan view thereof, and FIG. 3 is a front side view. A front view as seen from the left side (in FIG. 1), FIGS. 4 and 5 are side views showing the function, and FIG. 6 is a side view of the all-terrain vehicle according to the second embodiment of the present invention. , FIG. 7, and FIG. 8 are views showing a third embodiment of the all-terrain vehicle according to the present invention. FIG. 7 is a side view thereof, and FIG. 8 is a track belt attached around the wheels 2a. 70, FIGS. 9 and 10 are diagrams showing a fourth embodiment of the all-terrain vehicle according to the present invention, FIG. 9 is a drive system diagram thereof, and FIGS. 10 fa) and ('b). , (C) are JIC symbol diagrams of each directional switching valve switched to each position, FIG. 11 is a partial cross-sectional plan view of an all-terrain vehicle according to a fifth embodiment of the present invention, and FIG. 12 is a diagram of the present invention. FIG. 13 is a schematic plan view of an all-terrain vehicle according to a sixth embodiment of the present invention; FIG. 14 is a schematic plan view of an all-terrain vehicle according to a seventh embodiment of the present invention;
FIG. 15 is a view showing an eighth embodiment of the all-terrain vehicle according to the present invention, FIG. 14 is a side view thereof, and FIG. 15 is an explanatory view of the operation. 190. Body la, front part lb, rear part 2a, 2b, front left wheel 3a, 3b, front right wheel 5.6.55. ,,forward traveling means7.8.17.18.57.58. ,,Support frame 10.1
1.20.21.61.62.100.101.103
．． 104 ,,, Support shafts 12a , 12b , , Rear left wheels 13a , 13b , , Rear right wheels 15.16.56. ,, Rear traveling means 23.24.25.26. ,,hydraulic motor 31.32.
33.34. ,, winding is transmission link 36.37.38.
,, pump 39, , engine 40.41. , handle 43, , loading platform 45.46. ,,hydraulic cylinder 47,,,switching pulp 48,,,switching handle 52.53.70.71.72.73. ,, Track belt 64.65. ,, Sprocket 67, , Guide roller 1111. H,H,+” 70a,,,inner protrusion 75.76.77.78.,,directional switching valve 80.8
1. , joint pin 83, , axle 87, , inner gear 88, , steering wheel 90, , pinion X10. Uphill slope Y19. Downhill 209. Rough terrain convex part Poo, flat part S00. Steering trajectory patent applicant Okano Kosan Co., Ltd. Agent Patent attorney Yoshiaki Yamaki Figure 3 Figure 4 Figure 5 Figure 6 Figure 7 Figure 8 Figure ρ Figure 11 Figure 15 Procedural amendment (voluntary) 1. Indication of the case Japanese Patent Application No. 1987-195273 2, Title of the invention: Rough-terrain vehicle 3, Person making the amendment” Relationship to the case Address of patent applicant Address: 469 Kuwayama, Edosaki-cho, Inashiki-gun, Ibaraki Name: Okano Kosan Co., Ltd. Company 4, Agent 136 Address 5-6-8 Oshima, Koto-ku, Tokyo Name (8)
771) Patent Attorney Yoshiaki Yamaki Telephone: 03-638-7451 5. Column 7 of "Detailed Description of the Invention" of the specification to be amended, Contents of the amendment <1) On page 11, line 20 of the specification, ``Vehicles traveling on rough terrain'' have been changed to ``Vehicles traveling on rough terrain can be driven on wetlands, snowy roads, etc. by lowering the ground pressure per unit area, and even on such soft places. ,” is corrected. (2) Between line 7 and line 8 of page 12 of the specification, “
Further, according to the second embodiment, since a local concentrated load is not applied due to a part of the crawler floating or jumping up, the crawler is not damaged by such concentrated load and its durability is extremely high. improves. Furthermore, since four crawlers are provided in this second embodiment, even if one of the crawlers is damaged, it is possible to prevent the vehicle from immediately becoming unable to run as in the conventional case. Furthermore, in the past, one motor drove two left and right crawlers, which made the drive transmission structure complicated, large and expensive, but according to this second embodiment, four Since each crawler is driven by its own motor, the drive transmission structure becomes simpler, the crawler etc. can be made smaller, and the cost can be reduced.0, and even if the crawler is damaged, only one of the four Since it is only necessary to replace one part, maintenance costs can be significantly reduced. ” is inserted. (3) On page 20 of the specification, line 4: “Since it is less than,
'' was corrected to ``Since it is less than, as shown in Figure 5.'' (4) Between lines 7 and 8 of page 20 of the specification, ``(Effect of the invention) As explained above, according to the present invention, each of the plurality of wheels or the endless track belt is It moves up and down freely according to the irregularities of the uneven ground and always remains in contact with the ground, and each of the multiple wheels or part of the endless track belt does not lift or jump up, providing sufficient traction force and stable running. In addition, since the tilting phenomenon of the body when riding on the uneven ground convex portion Z is alleviated, the riding comfort can also be improved.Furthermore, according to the second embodiment, the In addition to obtaining the same effects as the first embodiment, it also significantly improves its durability by preventing damage due to localized concentrated loads, and simplifies and downsizes its drive transmission structure and crawler, reducing its price and maintenance costs. Furthermore, even if one of the four crawlers is damaged, it can be prevented from immediately becoming unable to run as in the conventional case.Furthermore, according to the third embodiment, the first and second crawlers In addition to obtaining the same effects as in the embodiment, the cushioning properties are improved compared to a normal crawler vehicle, making the ride more comfortable.Furthermore, the running performance when the crawler is damaged is compared to that in the second embodiment. Further, according to the fourth embodiment, it is possible to selectively realize full-time driving and part-time driving like a four-wheel drive vehicle, and when driving on flat ground, part-time driving can be achieved. By running, the vehicle speed can be doubled and the vehicle can be moved more quickly.Furthermore, according to the fifth embodiment, since the traveling means at the four corners of the vehicle can touch the ground on uneven ground in a twisted state, Even if only one of the means rides on the rough terrain convex part Z, all the traveling means (wheels, etc.) can be reliably grounded, so that even more sufficient traction force and stable traveling can be obtained. According to the seventh embodiment, the steering performance can be further improved.Furthermore, according to the seventh embodiment, the steering performance can be improved in the same manner as the sixth embodiment.Further, according to the eighth embodiment, Steering performance can be improved by reducing the load applied to the wheels at the front and rear ends of the vehicle compared to the load applied to the wheels at the center, and the deterioration of ride comfort when the vehicle runs onto the bumps Z on rough terrain can be reduced. Insert "can be done." (Voluntary amendment to the above procedures) June 10, 1988, Patent Application No. 195273 2, Title of the invention: Rough terrain vehicle 3, Relationship with the person making the amendment Patent applicant Address: Edosaki-cho, Inashiki-gun, Ibaraki Prefecture 469 Kuwayama, Oaza Name: Okano Kosan Co., Ltd. 4, Agent: 136 Address: 5-6-8 Oshima, Koto-ku, Tokyo Name: (8)
771) Patent Attorney Yoshiaki Yamaki Tel: 03-638-7451 5. The "Detailed Description of the Invention" and "Brief Description of the Drawings" columns of the specification to be amended, and the drawings. 6. Contents of the amendment (1) In the third line of page 10 of the specification, the phrase "furthermore" is changed to "also." (2) Between lines 15 and 16 of page 10 of the specification, it is stated that ``Furthermore, the support frame 7 of each traveling means 5.6.15.16
．． 8.17.18 respectively have hydraulic motors 23.24.
25 and 26 are provided individually, and each of these hydraulic motors swings together with the support frame, so if the hydraulic motor is fixed to the body side, or the conventional differential gear in the center of the body, or even the drive shaft. When the driving force is mechanically transmitted to the wheels via a chain, the rocking of the support frame may cause a reaction force to be applied to the drive source via a chain, which may impede the drive or cause a malfunction. "will not occur." is inserted. (3) On page 10, line 17 of the specification, the phrase ``used, but mechanically'' was replaced with ``but mechanically, if it was devised so that it would not be subjected to the reaction force described above. ” he corrected. (4) Between lines 19 and 20 on page 17 of the specification, there is a statement that says, ``In this sixth embodiment, the vehicle is forcibly steered by telescopically operating the hydraulic cylinder. By using the hydraulic drive system as in the first embodiment, the above-mentioned hydraulic cylinder is not necessarily necessary.In other words, for example, if the right wheel rotates more than the left wheel, the vehicle is forced to turn to the left. However, since the body 1 is separated into the front part 1a and the rear part 1b, the front part 1a and the rear part 1b are separated by the steering force as shown in FIG. This is because the joint pin 81 tends to easily bend by itself. (5) Between line 7 and line 8 of page 10 of the specification, “
(Effects of the Invention) As explained above, according to the present invention, each of the tI wheels or the endless track belt moves up and down freely according to the unevenness of the rough ground and is always in contact with the ground, and each of the plurality of wheels or A part of the endless track belt does not lift or spring up, and sufficient traction force and stable running can be obtained. Furthermore, since the tilting phenomenon of the body when the vehicle rides on the uneven terrain convex portion Z is alleviated, the riding comfort can also be improved. Furthermore, the support frame of each traveling means is individually provided with a hydraulic motor, and each of these hydraulic motors swings together with the support frame, so if the hydraulic motor is fixed to the body side or the conventional When the side-wheel drive force is mechanically transmitted via a differential gear, etc., the rocking of the support frame causes a reaction force to be applied to the drive source via a chain, etc., which impedes the drive action. It will not cause damage or malfunction. Further, according to the second embodiment, in addition to obtaining the same effects as the first embodiment, damage due to localized concentrated loads is prevented, durability is significantly improved, and the drive transmission structure, crawler, etc. By simplifying and downsizing, the price and maintenance costs can be reduced, and even if one of the four crawlers is damaged, it can be prevented from immediately becoming unable to run as in the past. Further, according to the third embodiment, in addition to obtaining the same effects as those of the first and second embodiments, the cushioning properties can be improved compared to a normal crawler vehicle, and the riding comfort can be improved. Furthermore, the running performance even when the crawler is damaged can be improved more reliably than in the second embodiment. Further, according to the fourth embodiment, it is possible to selectively realize full-time driving and part-time driving like a four-wheel drive vehicle, and when driving on flat ground, the part-time driving doubles the vehicle speed and makes the vehicle faster. Vehicles can be moved. Further, according to the fifth embodiment, since the traveling means at the four corners of the vehicle can touch down on the rough ground in a state that is twisted with respect to the horizontal plane, only one of the traveling means can run onto the uneven ground protrusion Z. All the means of travel (wheels, etc.) can be securely grounded, providing even more traction and stable running. Furthermore, according to the sixth embodiment, the steering performance can be further improved. In this sixth example 1@p1, the vehicle is forcibly steered by telescopically operating the hydraulic cylinder, but by using the hydraulic drive system as in the first embodiment, the hydraulic cylinder is Not necessarily necessary. Further, according to the seventh embodiment, the steering performance can be improved similarly to the sixth embodiment. Further, according to the eighth embodiment, the load applied to the wheels at the front and rear ends of the vehicle can be reduced compared to the load applied to the wheels at the center, thereby improving steering performance. It is possible to reduce the discomfort caused by riding on a vehicle. ” is inserted. (6) “12th
The figure is... . . . schematic plan view," instead of "1st
2 and 16 are diagrams showing a sixth embodiment of the all-terrain vehicle according to the present invention, and FIG. 12 is a schematic plan view thereof, and FIG.
(2 is an explanatory diagram of its action, corrected as j. (7) Add the drawing (Fig. 16).

Claims (4)

[Claims] (1) Rough terrain equipped with a body and a plurality of wheels connected to each other by a support frame at appropriate intervals, or a plurality of traveling means constituted by a track belt attached around the support frame. An all-terrain vehicle, characterized in that an intermediate portion of a support frame of the traveling means is connected to a front portion and a rear portion of the body so as to be swingable back and forth. (2) The feature set forth in claim 1, characterized in that, of the traveling means constituted by the plurality of wheels, an endless track belt is separately attached to each traveling means directly around the plurality of wheels. Ground leveling vehicle. (3) Among the traveling means, a choice is made between providing a driving force to one connected to both the front and rear parts of the body, and providing a driving force to only one connected to one of them. An all-terrain vehicle according to claim 1 or 2, characterized in that the vehicle can be driven on rough terrain. (4) If the support frame of the traveling means is connected to the front part of the body, the support frame is located at the rear side of the body from the center point of the support frame, and if the support frame is connected to the rear part of the body, the support frame is supported. Claims 1 to 3 are characterized in that the frame is disposed offset toward the front side of the body from the center point of the frame.
The rough terrain vehicle described in any of the paragraphs.