JP2801794B2 - Traveling vehicle - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a running vehicle such as a snowmobile, and more particularly to a vehicle capable of changing the front and rear contact load distribution by changing the weight of a driver.

[0002]

2. Description of the Related Art Conventionally, as this type of traveling vehicle, for example, a snowmobile described in Japanese Patent Publication No. 58-50914 is known. In this snowmobile, a steering sled is provided at the front lower portion of the vehicle body via a leaf spring, and an endless track is provided at a rear lower portion of the vehicle body as a drive device connected to a power unit via a suspension device. Then, a seat is mounted on the vehicle body, and a driver sitting on the seat steers the sled with a steering wheel, and drives the endless track by a power unit to travel.

[0003]

However, in the above-mentioned conventional snowmobile, the steering sled constituting the front steering section is adapted to the load distribution ratio of the rear drive unit to the endless track. Since the vehicle is grounded by a load, when traveling on a soft road surface such as fresh snow, there is a problem that the sled easily enters under the snow and the traveling resistance increases. The present invention has been made in view of the above problems, and has as its object to provide a traveling vehicle that can travel lightly on a soft road surface without increasing traveling resistance.

[0004]

In order to achieve the above object, according to the first aspect of the present invention, one ski for steering is mounted on a front portion of a vehicle body, and is provided substantially at the center of the vehicle body in the front-rear direction. one crawler belt apparatus through the axial support portion swingably with attached Rukoto vertically, these one ski and one
The vehicle body is supported only with the crawler belt device,
The cushion unit interposed between the body and the crawler belt device, arranged power unit for driving the crawler belt device in front of the shaft support, said succumbed
Forming a riding section on which the operator can stand and ride on the vehicle body so as to straddle the vehicle body connection position of the operation unit back and forth ,
The riding portion extends rearward from a line L1 connecting the grip portion of the steering handle and the rearmost contact point of the crawler belt device, and the extended portion is a substantially flat footrest portion. The connection position is slightly ahead of the line L1.

[0005] In the traveling vehicle according to the second aspect of the present invention, at least a part of the footrest portion is located behind the rearmost contact point of the driving device. Further, the traveling vehicle according to the third aspect of the present invention is characterized in that a steering handle is supported on the vehicle body so as to be tiltable in the front-rear direction with respect to the vehicle body, and a resilient means for urging the steering handle to a predetermined standing position is provided. Provided.

[0006]

According to the first aspect of the present invention, a traveling vehicle is a vehicle.
Formed a riding section on the body where the pilot can stand and ride
So, the pilot on board will shift weight forward and backward
Accordingly, the distribution of the ground contact load between the front and rear of the vehicle body can be changed. sand
In other words, since the center of gravity of the vehicle moves rearward when the pilot places his or her feet on the footrests and shifts the weight backward, it is easy to reduce the ground contact load of the steering section at the front of the vehicle body, Running
Breakability is improved. And the body unit of the cushion unit
A pilot stands on the vehicle so as to straddle the connection position back and forth
The crawler belt device shaft
For driving the crawler belt device ahead of the branch
Since the power unit is installed, the ground load
The minutes can be changed easily. Also one for steering
The vehicle can be propelled by one ski and one crawler belt device, and at the time of cornering, can be turned by actively banking (tilting sideways) the vehicle body. For this reason, in the bank, the center of gravity of the vehicle can be changed by the movement of the center of gravity of the driver and the handling (steering operation). Similarly, when the driver crosses the gap of the traveling path, the center of gravity of the vehicle can be smoothly changed by moving the center of gravity of the driver. Accordingly, the movement of the center of gravity of the vehicle body is facilitated, and the steering performance is enhanced.

In the traveling vehicle according to the second aspect of the present invention, since the footrest is located behind the rearmost contact point of the driving device, the center of gravity of the vehicle can be moved further backward. Also, the traveling vehicle according to the third aspect of the present invention supports the steering handle so as to be tiltable in the front-rear direction of the vehicle body and has a resilient means for urging the steering handle to a predetermined standing position. The steering wheel grip can be held even when the foot is placed on the rear side of the footrest, and since the steering handle is biased to a predetermined standing position, the amount of tilt of the steering handle accompanying the travel of the vehicle ( Wobble) can be suppressed.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. 1 and 2 show a traveling vehicle according to a first embodiment of the present invention. FIG. 1 is a schematic side view of a snowmobile as a traveling vehicle, FIG. 2a is a partially enlarged side view of the snowmobile, and FIG.
Is a partially enlarged front sectional view of the snowmobile.

As shown in FIG. 1, one running ski 16 is attached to the front of a vehicle body 11 for steering.
A drive device 18 as a crawler belt device is vertically swingably mounted via a shaft support 7 provided substantially at the center in the front-rear direction, and a cushion unit 24 is interposed between the drive device 18 and the vehicle body 11. And a power unit 17 for driving the driving device 18 ahead of the shaft support 7. In this way, the traveling vehicle has one ski 1
The vehicle body 11 is supported only by 6 and one driving device 18.
It is. The vehicle body 11 is formed with a riding section 11a on which an operator can ride while standing. Boarding department 11
a is the vehicle body of the cushion unit 24 as shown in FIG.
It is formed so as to straddle the connecting position back and forth, and is provided with a grip portion 14a of the steering handle 14 (hereinafter referred to as "handle grip 1").
4a ". ) And extended from the line L1 rearward connecting the rearmost ground point of the drive unit 18, substantially flat the extending portion
The foot rest can be placed ( substantially flat foot rest 77 ) . The vehicle body connection position of the cushion unit 24 is slightly ahead of the line L1. Hereinafter, the traveling vehicle will be described in detail. In FIG. 1, reference numeral 11 denotes a substantially flat vehicle body, and a flat riding portion 11a is formed on the vehicle body 11 over substantially the entire upper surface thereof. A pilot M stands on the riding section 11a as schematically shown in the figure, and the pilot M can put his foot on the rear end of the riding section 11a. The rear end of the riding portion 11a corresponds to the footrest portion 77.

[0010] A head tube 12 is fixed to the front end of the vehicle body 11, and a steering shaft 13 is rotatably inserted into the head tube 12. The steering shaft 13 has a steering handle 14 fixed to the upper end, and a ski (steering unit) 16 at the lower end via a trailing link mechanism 15.
Is mounted so that it can move up and down. This steering shaft 13 has a resilient mechanism 5 as a resilient means at a lower end,
The ski 16 swings around the steering shaft 13 by the steering of the steering handle 14. Although a detailed description is omitted, the link mechanism 15 includes a cushion spring 15a.
And bias the ski 16 downward toward the road surface.

As shown in FIGS. 2A and 2B, the resilient mechanism 5
A square section shaft 1 is attached to the steering shaft 15b of the link mechanism 15.
The outer case 113 is attached to a joint plate 13a below the steering shaft 13, and four elastic rubbers 5a are accommodated between the square section shaft 115 and the outer case 113. The resilient mechanism 5 generates a restoring force against the twist between the rectangular section shaft 115 and the outer case 113 to generate an urging force for returning the steering shaft 13 to the neutral position A.

Also, a head tube 12 is provided on the vehicle body 11.
A power unit 17 is mounted behind the power unit 17, and a driving device 18 is suspended below the power unit 17 below. As is well known, the power unit 17 is formed by integrally assembling an engine and a transmission, and an output shaft of the transmission is connected to a driving device 18 by a chain 19 so as to be able to transmit power.

The drive unit 18 supports a drive wheel 20 and an idler wheel 21 at the lower portion of the vehicle body 11 so as to swing back and forth by a holder 23 and a crawler belt 22 on the drive wheel 20 and the idler wheel 21. Is wound around. A cushion unit 24 is interposed between the holder 23 and the vehicle body 11 at an intermediate portion, and the drive wheel 20 is connected to the power unit 17 by the above-described chain 19. This driving device 18
The crawler belt 22 is grounded in a large area, and the crawler belt 22 is driven by the power unit 17 to generate a driving force.

In the snowmobile according to the first embodiment, a riding section 11a is set on the vehicle body 11, and the riding section 11a is provided at the rear with a line connecting the handle grip 14a and the rearmost ground point of the crawler belt 22. It has a footrest portion 77 extending rearward from L1. Here, the pilot M can stand on the riding section 11a, and in particular, the pilot M can stand on the riding section 11a with his / her foot on the footrest section 77 behind the line L1. Exerts a force as indicated by the arrow in the figure. Therefore, when the pilot M moves in the front-rear direction as indicated by the solid line and the chain line in the figure, the center of gravity of the entire vehicle moves back and forth, and a moment about the vehicle width direction axis is generated in the vehicle body 11, The distribution of the ground contact load between the ski 16 and the crawler belt 22 of the driving device 18 can be adjusted.

That is, in this snow vehicle, when the operator M moves forward (solid line), the contact load of the ski 16 can be increased, and when the driver M moves backward (chain line), the contact load of the ski 16 can be reduced. It is easy to change the load distribution. When traveling on fresh snow, the pilot M
Can move rearward as indicated by a chain line to reduce the contact load of the ski 16 and prevent the ski 16 from getting into fresh snow.

FIG. 3 shows a traveling vehicle according to a second embodiment of the present invention. FIG. 3A is a side view, and FIG. 3B is a plan view. The same parts as those in the first embodiment are denoted by the same reference numerals, and the description is omitted. In the second embodiment, a front wheel 31 is provided in place of the ski of the first embodiment described above.
The driving device 18 is connected to three roller-shaped wheels 34a, 34b,
34c.

The drive unit 18 is provided with a wheel holder 33 on a rectangular frame-shaped swing frame 32 which is swingably supported by the vehicle body 11.
Is attached to the wheel holder 33, and three wheels 34a,
34b and 34c are supported. The holder 33 includes a wheel 34
axles 35a, 35a to which a, 34b, 34c are fixed.
5b and 35c are arranged in a ladder shape in the front and rear direction and rotatably supported.
At 6, it is swingably supported by the swing frame 32.

A driven sprocket 36 is mounted on the axle 35b.
b and two transmission sprockets 37a, 37b, a transmission sprocket 38a is fixed to the axle 35a, and a transmission sprocket 38b is fixed to the axle 35c. A chain 19 is mounted between the driven sprocket 36b and the drive sprocket 36a of the power unit 17, and a chain 39 is provided between the transmission sprockets 37a and 38a.
Similarly, a chain 39b is mounted between the transmission sprockets 37b and 38b.

Also in the second embodiment, a riding portion 11a is set on the vehicle body 11, and the riding portion 11a is provided with the handle grip 14a and the rearmost wheel 34c of the driving device 18.
And extends rearward from the line L <b> 1 connecting the ground contact point, and the rear end functions as the footrest portion 77. Therefore, similarly to the above-described embodiment, the load distribution between the front wheels 31 and the driving device 18 can be changed by the forward and backward movements of the operator M who stands on the riding section 11a.

FIGS. 4 to 8 show a third embodiment of the present invention. FIG. 4 is a perspective view of a snowmobile as a traveling vehicle, FIG. 5 is a side view of the snowmobile, and FIG. FIG. 7 is a plan view of the snowmobile with the parts removed, and FIG.
FIG. 8 is a partially enlarged view showing another mode of the main part.

In the drawing, reference numeral 40 denotes a vehicle body, and the vehicle body 40 is a substantially rectangular frame-shaped main frame 4 formed by joining pipes.
1 is formed by fixing a body member 42 such as a synthetic resin. The vehicle body 40 has a riding section 40a on which the pilot M can stand and ride.
Is formed, and the rear end of the boarding portion 40a is bent upward to form a footrest portion 77 in a predetermined range w on the rear upper surface,
The power unit 43 is mounted on the front. Footrest 77
Is formed substantially flat so that the operator can place his / her feet, and extends rearward from a rear end e of the driving device described later (see FIG. 5).

The power unit 43 is constructed by integrally assembling the engine and the transmission, and the upper part is covered by a bonnet 44. This power unit 4
In 3, the output shaft of the transmission is disposed below the vehicle body 40, and a drive sprocket 45 a is fixed to the output shaft of the transmission and is connected to a driving device via a chain 46. The hood 44 is fixed to a hood frame 47 erected on the front of the vehicle body 40. Although not shown, the hood 44 includes an air cleaner 52, a fuel tank 53, and a battery 54 together with the power unit 43.
And a muffler 69 are accommodated. In addition, 69a is an exhaust pipe.

A head tube 48 is fixed to the front end of the vehicle body 40, and a lower steering shaft 49 is rotatably inserted into the head tube 48. The lower steering shaft 49 has an upper steering shaft 55 connected to an upper end thereof via a universal joint 56 so as to be able to tilt (tilt) in the front-rear direction.
Similar to the embodiment, the ski is connected to the ski 51 via the trailing link mechanism 50. The trailing link mechanism 50
Ski 51 with Joint to Lower Steering Shaft 49
A cushion spring 50a is interposed between the connecting portion and the connecting portion. Reference numeral 51a denotes a handle provided at the front end of the ski 51, and reference numeral 80 denotes a boot for protecting the universal joint 56.

The upper steering shaft 55 has a steering handle 81 fixed at the upper end thereof, and a sleeve 59 rotatably provided on the outer periphery of the intermediate portion. A pair of left and right stays is provided between the sleeve 59 and the bonnet frame 47. 57
L, 57R are installed. As shown in detail in FIG. 7, the stays 57L and 57R are arranged in an eight-shape between the sleeve 59 and the bonnet frame 47, and are connected to the sleeve 59 and the bonnet frame 47 via a ball joint 58. The stays 57L, 57R prohibit the upper steering shaft 55 from falling left and right, and the stays 57L, 57R have resilient coil springs 100L, 100R.
Is generated to generate a force for returning the steering shaft 55 to the neutral position A ′.

The stays 57L and 57R are not limited to the above-described embodiment, but may be configured as shown in FIG. As shown in the figure, in this embodiment, a sleeve 59 is provided on the upper steering shaft 55 so as to be rotatable and slidable in the axial direction. One end of stays 57L, 57R is connected to the sleeve 59 via a ball joint 58.
Is connected to the bonnet frame 47 by a bolt 99 so as to be rotatable around the bolt 99. Also in this mode, the upper steering shaft 55 can be prevented from falling left and right.

Further, as shown in FIG. 5, a pair of left and right brackets 61 are provided vertically below the vehicle body 40, and a driving device 60 is swingably supported by the brackets 61. The drive device 60 has two idler wheels 64 and 65 rotatably attached to a wheel holding member 63 supported by a link 62 so as to be vertically movable.
6, the idler wheels 64 and 65 and the drive wheel 6
A crawler belt 67 is mounted on 6. The drive wheel 66 is fixed to a rotating shaft (not shown) provided between the brackets 66, and the driven sprocket 45b is fixed to the rotating shaft. As described above, the driven sprocket 45b is mounted with the chain 46 between the driven sprocket 45b and the drive sprocket 45a, and the drive wheels 66 are driven by the power unit.

A torsion spring 68 is attached to each of the brackets 61, and the front end of the wheel holding member 63 is urged downward by the torsion spring 68. This wheel holding member 63 has idler wheels 64, 65
The lower end of the cushion unit 70 is attached therebetween. The upper end of the cushion unit 70 is attached to the lower part of the vehicle body 40. As in the first embodiment, the attachment portion of the cushion unit 70 to the vehicle body 40 is the rearmost ground point of the steering handle 81 and the crawler belt 67. And is located forward of the line L1 connecting.

Also in the third embodiment, the load distribution between the ski 51 and the driving device 60 can be adjusted by shifting the weight of the pilot M who stands on the riding section 40a on the vehicle body 40, and the vehicle runs on fresh snow. In this case, the ski 51 can be prevented from sneaking into the snow by moving the weight of the operator backward.

In the third embodiment, in particular, the riding portion 40a extends rearward of the rear end of the driving device 60 to form the footrest portion 77 rearward of the rear end of the driving device 60.
Therefore, when the operator puts his or her foot on the footrest portion 77, the moment of tilting the vehicle body 11 so that the front portion moves upward can be increased, and the ground contact load of the ski 51 can be easily reduced.

FIG. 9 shows a traveling vehicle according to a fourth embodiment of the present invention, and is a side view of a snowmobile. In the fourth embodiment, the same portions as those in the above-described third embodiment are denoted by the same reference numerals, and description thereof will be omitted.

As shown in the figure, in the fourth embodiment, the rear end of the riding portion 40a of the vehicle body 40 is bent largely upward to form the footrest portion 77 in a stepped shape. To be able to sit and use. A hole is formed in the footrest portion 77 to provide a grip 97, and a grip 98 is also provided at the front end of the vehicle body 40.

The driving device 60 is provided between the wheel holding member 63 and the rotating shaft provided between the brackets.
6, the cushion unit 70 is connected to the joint of the arm member 96 to the wheel holding member 63, and a cushion spring 95 is interposed between the arm member 96 and the front idler wheel 64. Furthermore, the lower steering shaft 49 and the upper steering shaft 55 are tiltably connected by a connecting shaft 75 with a biasing rubber extending left and right,
The urging rubber generates an urging force for returning to the neutral position A ″.

In the fourth embodiment, since the footrest portion 77 is formed in a stepped shape on the vehicle body 11, the operator can sit on the footrest portion 77, and there is great freedom in the riding posture. can get.

In each of the above embodiments, a special vehicle such as a snowmobile is exemplified, but it is needless to say that the present invention can be applied to a vehicle having ordinary tires.

[0035]

As described above, according to the first aspect of the present invention, it is possible for a driver to stand and ride on a vehicle body.
Since the riding section was formed, the pilot who got on
Weight distribution to distribute the ground load before and after the vehicle
Can be changed. That is, the operator places his foot on the footrest
Moving the weight backward shifts the center of gravity of the vehicle
The ground contact load of the steering ski at the front of the vehicle.
Driving resistance, even on soft road surfaces.
If you can run lightly without increasing the
In both cases, the running performance is improved. Further, a footrest is provided extending rearward from a line L1 connecting the grip portion of the steering handle and the rearmost contact point of the drive device, and a reaction force from the drive device is received at a portion forward of the line L1. As a result, the pilot can easily change the distribution of the ground contact load before and after by placing the foot on the footrest and changing the load applied to the footrest .
The steering performance is improved, and the running resistance is improved even on soft road surfaces.
It is possible to drive even more lightly without increasing drag.
And the running performance is improved. In addition,
The vehicle so that the connection unit
Forming a riding section on the body where the pilot can stand and ride,
A craw label is provided in front of the shaft support of the crawler belt device.
A power unit to drive the
This makes it easy to change the distribution of the grounding load on the front and rear of the vehicle.
Steering performance is improved, and running resistance is improved even on soft road surfaces.
It is possible to drive even more lightly without increasing drag.
And the running performance is improved. Furthermore,
The vehicle can be propelled by one ski and one crawler belt device for steering, and can make a cornering by turning the vehicle body positively by banking (inclination to the side). For this reason, in the bank, the center of gravity of the vehicle can be changed by the movement of the center of gravity of the driver and the handling (steering operation). Similarly, when the driver crosses the gap of the traveling path, the center of gravity of the vehicle can be smoothly changed by moving the center of gravity of the driver. Accordingly, the movement of the center of gravity of the vehicle body is facilitated, and the steering performance is enhanced.

According to the second aspect of the present invention, since the footrest is formed behind the rearmost contact point of the drive unit, the moment acting to raise the front part of the vehicle body can be increased. Adjustment of the ground load distribution is easier.
Further, according to the third aspect of the present invention, the steering handle is supported so as to be tiltable in the front-rear direction of the vehicle body and is urged to a predetermined standing position. Makes it easy to hold the steering handle.

[Brief description of the drawings]

FIG. 1 is a schematic side view of a traveling vehicle according to a first embodiment of the present invention.

2 is an enlarged view of a part of the traveling vehicle, FIG. 2A is a side view, and FIG. 2B is a front sectional view.

3A and 3B show a traveling vehicle according to a second embodiment of the present invention, wherein FIG. 3A is a side view and FIG. 3B is a plan view.

FIG. 4 is a perspective view of a traveling vehicle according to a third embodiment of the present invention.

FIG. 5 is a side view of the traveling vehicle.

FIG. 6 is a plan view of the traveling vehicle.

FIG. 7 is a front view of one main part of the traveling vehicle.

FIG. 8 is a partially enlarged view showing another embodiment of the main part.

FIG. 9 is a side view of a traveling vehicle according to a fourth embodiment of the present invention.

[Sign Description of the 5 ... resilient means (resilient mechanism), 11 ... body, 11a ··· tower
Th power unit, 14 ... steering wheel, 14a ... grip, 1
6 ... ski, 17 ... power unit, 18 ... claw
Raberuto apparatus (drive), 22 ... crawler belt,
24 ... Cushion unit, 77 ... Foot rest, L1 ... Operation
Grip on the handle and the rearmost end of the crawler belt device
Line connecting the ground point.

Continued on the front page (72) Inventor Hideaki Suzuki 1-4-1 Chuo, Wako-shi, Saitama Pref. Honda Technical Research Institute, Inc. (56) References JP-A-61-36098 (JP, A) (JP, U) JP-A 2-139194 (JP, U) JP-A 50-97134 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) B62B 7/00-19 / 04

Claims (3)

(57) [Claims] 1. A ski for steering is mounted on a front portion of a vehicle body, and a crawler belt device is swingably mounted up and down through a shaft support provided substantially at the center of the vehicle body in the front-rear direction.
By doing this one ski and one crawler belt
The vehicle body is supported only by the device,
The cushion unit interposed between the belt device, arranged power unit for driving the crawler belt device in front of the shaft support, said cushion unit
A rider is formed on the vehicle body so that a driver can stand and ride on the vehicle body so as to straddle the vehicle body connection position in the front and rear direction. A traveling vehicle that extends rearward from a connecting line L1, the extended portion is a substantially flat footrest portion, and a vehicle body connecting position of the cushion unit is slightly forward of the line L1. 2. The traveling vehicle according to claim 1, wherein at least a part of the footrest is located behind a rearmost contact point of the crawler belt device. 3. The traveling system according to claim 1, wherein said steering handle is supported so as to be tiltable in the front-rear direction of the vehicle body, and a resilient means for urging said steering handle to a predetermined standing position is provided. vehicle.