JP2508396Y2 - All-wheel drive sprayer - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to an all-wheel drive type spray vehicle that travels through a furrow passage in a house or the like and sprays a chemical solution or the like to a crop in the furrow. The present invention relates to an all-wheel drive spraying vehicle that is excellent in both properties.

[Conventional technology]

Japanese Utility Model Laid-Open No. 1-73365 discloses a self-propelled spreading vehicle that travels back and forth in a furrow passage in a house. In this self-propelled scatter vehicle, the wheels on the front side in the traveling direction serve as the drive wheels regardless of whether the vehicle is moving forward or backward.

On the other hand, there are also self-propelled spreaders that drive in a furrow passage by four-wheel drive.

[Problems to be solved by the device]

In the self-propelled spreading vehicle disclosed in Japanese Utility Model Laid-Open No. 1-73365, although the straightness is excellent, if the driving wheel gets stuck in a muddy area, the driving wheel slips and it becomes difficult to escape, resulting in poor running performance.

The four-wheel drive type spreader has excellent running performance, but if the direction of travel deviates slightly to the left or right, the four-wheel drive type spreader will ride on the ridges as it is, and it is easy for the vehicle to fall over, which lacks straightness. .

An object of the present invention is to provide a self-propelled spreading vehicle which is excellent in both running and straight running characteristics.

[Means for solving the problem]

The invention will be described using the reference numerals of the drawings corresponding to the embodiments.

In the all-wheel drive type spreading vehicle (10) of this invention, each wheel (1
4, 16) are rotatably supported on the ends of the axles (36, 44). The elastic member (78) is provided between the wheel-side facing portion (64) and the axle-side facing portion (76) that face each other.

[Action]

The elastic member (78) has an axle side facing part (76) on both sides.
The wheel-side facing portion (64) is pressed, and a predetermined frictional force is generated between the elastic member (78) and the axle-side facing portion (76) and the wheel-side facing portion (64). Therefore, the axle (3
The rotational power of the wheel (14, 1) is transmitted through the axle side facing part (76), the elastic member (78) and the wheel side facing part (64).
6) is transmitted to.

When the heights of the left and right wheels (14, 16) are equal, the weight of the all-wheel drive type spray vehicle (10) is evenly carried by the left and right wheels (14, 16), and the left and right wheels (14, 16) have the same weight. The torque required for driving is equal. Therefore, the slip of the elastic member (78) is equal on each of the left and right sides, and the wheel side facing portion (64) is the same from the axle side facing portion (76) via the elastic member (78) on each of the left and right sides. The rotational power is transmitted at the rotational speed. As a result, the left and right wheels (14, 16) are driven at a constant speed,
All-wheel drive sprayer (10) goes straight.

When the height of one wheel (14, 16) on the left and right becomes higher than that of the other wheel (14, 16) due to the possibility of riding on the ridge, the weight of the all-wheel drive sprayer (10) is lower. The other wheel (14,16) is more loaded, and the left and right wheels (14,1)
The torque required to drive 6) is reduced by the higher wheels (14,16) relative to the lower wheels (14,16). Therefore, on the side where the height is low, the slippage of the elastic member (78) increases and the rotation speed of the wheel side facing portion (64) decreases. As a result, the higher wheels (14,16) are driven at a higher speed than the lower wheels (14,16), and the all-wheel drive sprayer (10) is driven by the lower wheels (14,16). ) To change the direction and return to the original direction of travel.

〔Example〕

 Hereinafter, this invention will be described with reference to embodiments of the drawings.

FIG. 3 is a schematic side view of the four-wheel drive spreader vehicle 10. At the lower part of the vehicle body 12, front wheels 14 are provided on the left and right sides of the front side, and rear wheels 16 are provided on the left and right sides of the rear side, respectively, and the four-wheel drive type spray vehicle 10 is driven by the rotation drive of the front wheels 14 and the rear wheels 16. It is free. The forward / reverse rotatable motor 18 is arranged in the vehicle body 12, and is also driven by being supplied with electric power from the battery 20 in the vehicle body 12. The rotation power of the motor 18 is sprocket 2
2.Counter shaft 28 through chain 24 and sprocket 26
Is transmitted to The rotational power of the counter shaft 28 is transmitted to the front wheel 36 via the sprocket 30, the chain 32 and the sprocket 34, and is transmitted to the rear wheel 44 via the sprocket 38, the chain 40 and the sprocket 42. The front wheels 14 are attached to the left and right ends of the front axle 36, and the rear wheels 16 are attached to the left and right ends of the rear axle 44. The nozzle pipes 46 are arranged in the front part of the vehicle body 12 and extend in the vertical direction, and the nozzles 48 are attached to the nozzle pipes 46 at equal intervals and are directed to the left and right at each height. The hose 50 is wound around a hose reel (not shown) in the vehicle body 12 and is connected to a power sprayer (not shown) at one end side thereof.
According to the distance between the power sprayer and the power sprayer, it is fed out from the rear end of the vehicle body 12 and fed in. The pipe line 52 connects the hose 50 and the nozzle pipe 46, and guides the spray liquid such as the chemical liquid from the hose 50 to the nozzle pipe 46. The touch sensor 54 is
It is provided at a position projecting forward from the lower part of the front surface of the ridge, and at a predetermined position of the end portion of the furrow passage 55, the lower end portion is contacted with the protruding stake 56 and is turned on and off. The controller 57 is provided above the rear end of the vehicle body 12 and includes a switch 59 that is turned on when the four-wheel drive type spray vehicle 10 starts traveling from the start end of the furrow passage 55.

FIG. 1 is a structural view of an assembly portion of the front wheel 14 to the front axle 36, and FIG. 2 is an enlarged view of an end portion of the front axle 36 of FIG. 1 and 2 show the relationship between the front axle 36 and the left front wheel 14 as a representative, the relationship between the front axle 36 and the right front wheel 14, and the relationship between the rear axle 44 and the left and right rear wheels 16. The relationship is also the same as in FIGS. 1 and 2. Front axle 36 is ball bearing at the end
It is rotatably supported by the vehicle body 12 via 58. Front wheel 14
Has a wheel 60 and a tire 62 mounted on a peripheral portion of the wheel 60, and a wheel boss 64 is rotatably supported on an end of the front axle 36 via a ball bearing 66. The outer ring of the ball bearing 66 is fitted into the step portion of the wheel boss 64 and prevented from coming off by the retaining ring 68, and the inner ring of the ball bearing 66 is prevented from moving inward in the axial direction of the front axle 36 by the retaining ring 70. ing. The bolt 72 is inserted into the washer 74 and then screwed into the front axle 36 to prevent the front wheel 14 and the ball bearing 66 from coming off the front axle 36. Flange
76 is integrally formed with the front axle 36 and faces the wheel boss 64 in the axial direction of the front axle 36. Belleville spring 78 is a wheel boss
It is contracted between the opposing surfaces of 64 and the flange 76.

 The overall operation of the four-wheel drive spray vehicle 10 will be described.

The four-wheel drive type spray vehicle 10 is placed on the starting end side of the furrow passage 55,
The operator turns on the switch 59 of the controller 57. As a result, the motor 18 rotates in the normal direction, the rotational power of the motor 18 is transmitted to the front wheels 14 and the rear wheels 16 via the counter shaft 28, etc., and the four-wheel drive type spray vehicle 10 drives the front wheels 14 and the rear wheels 16. It moves forward in the furrow passage 55 as a wheel.

When the four-wheel drive type spreading vehicle 10 reaches the terminal end side of the furrow passage 55, the touch sensor 54 contacts the pile 56, the motor 18 is stopped, and then the reverse rotation is performed. As a result, the four-wheel drive sprayer 10
Moves backward in the furrow passage 55 using the front wheels 14 and the rear wheels 16 as driving wheels, and returns to the starting end side of the furrow passage 55.

Since the four-wheel drive type spray vehicle 10 travels forward and backward by four-wheel drive in this way, even when the front wheels 14 and the rear wheels 16 are caught in the muddy portion of the furrow passage 55, they easily escape and have high running performance. .

The hose 50 is a four-wheel drive spreader vehicle 10 in the furrow passage 55.
As the spray liquid is fed from the vehicle body 12 and fed into the vehicle body 12 with the forward and backward movement of the vehicle, and is introduced from the power sprayer via the hose 50, the four-wheel drive type spray vehicle in the furrow passage 55.
10 round trips and / or sprays on ridge crops.

The operation of the embodiment will be described. The left and right front wheels 14 will be described. Although description of the operation of the left and right rear wheels 16 is omitted, it is the same as in the case of the left and right front wheels 14.

The disc spring 78 is pressed by the wheel boss 64 and the flange 76 on both sides in the axial direction by an elastic restoring force,
A predetermined frictional force is generated between the 76 and the disc spring 78, and between the wheel boss 64 and the disc spring 78, so that rotational power can be transmitted. Therefore, the rotational power of the front axle 36 is transmitted to the front wheels 14 via the flange 76, the disc spring 78 and the wheel boss 64.

When the heights of the left and right front wheels 14 are equal, a four-wheel drive type spreader
The weight of 10 is evenly carried by the left and right front wheels 14. The torque required to drive the left and right front wheels 14 is equal. Therefore, the slip of the disc spring 78 with respect to the flange 76 and the wheel boss 64 is equal on each of the left and right sides, and the wheel boss 64 transmits the rotational power from the flange 76 via the disc spring 78 at the same rotational speed on each of the left and right sides. Transmitted. As a result, the left and right front wheels
14 is driven at a constant speed, and the four-wheel drive spray vehicle 10 goes straight.

When the height of one of the left and right front wheels 14 becomes higher than that of the other front wheel 14 due to the likelihood of riding on a ridge, etc., the weight of the four-wheel drive type spray vehicle 10 is greater on the other front wheel 14 which is lower, The torque required for driving the left and right front wheels 14 is reduced in the higher front wheel 14 with respect to the lower front wheel 14. Therefore, on the side of the lower height, the slip of the disc spring 78 with respect to the flange 76 and the wheel boss 64 increases, and the rotation speed of the wheel boss 64 decreases. As a result, the higher front wheel 14 is driven at a higher speed than the lower front wheel 14, and the four-wheel drive sprayer 10 turns to the side of the lower front wheel 14,
It returns to the original direction of travel and maintains straightness.

In the illustrated embodiment, the disc spring 78 as an elastic member is provided between the wheel boss 64 and the flange 76 facing each other in the axial direction of the front axle 36 and the rear axle 44, but a sleeve-like elastic member is provided. It may be contracted between the portions on the front wheel 14 and rear wheel 16 sides and the portions on the front axle 36 and rear axle 44 sides facing each other in the radial direction.

[Effect of device]

In this invention, since the self-propelled scatterer travels by all-wheel drive, even if it gets stuck in a muddy or the like, it is not difficult to escape and good running performance can be obtained.

In this invention, the elastic member is contracted between the axle-side facing portion and the wheel-side facing portion, and the one having a larger driving torque is related to the magnitude of the torque required to drive the left and right wheels. Large slippage occurs in the elastic member on the side, the drive rotation speed of the wheel corresponding to the elastic member decreases, and the all-wheel drive type spray vehicle is directed to the side where the drive rotation speed is low. Further, the torque required to drive the wheels is higher than that of the wheels with a lower height because the weight of the all-wheel drive type dispersion vehicle is greater in the wheels of a lower height. Therefore, the all-wheel drive type spreader can be turned back to a lower height, and good straightness can be obtained.

[Brief description of drawings]

The drawings relate to an embodiment of the present invention. Fig. 1 is a structural view of an assembly portion of a front wheel to a front axle, Fig. 2 is an enlarged view of an end portion of the front axle of Fig. 1, and Fig. 3 is a four-wheel drive. It is a schematic side view of a type sprayer. 10 …… four-wheel drive spreader (all-wheel drive spreader), 14 ……
Front wheel (wheel), 16 …… rear wheel (wheel), 36 …… front axle (axle), 44 …… rear axle (axle), 64 …… wheel boss (opposite wheel side), 76 …… flange (axle) Side-to-side part),
78: Disc spring (elastic member).

Claims (1)

(57) [Scope of utility model registration request] 1. Wheels (14, 16) are rotatably supported on the ends of axles (36, 44), and elastic members (78) are opposed to each other on the wheel-side facing portion (64) and the axle side. An all-wheel drive type spreader characterized by being compacted between the facing part (76).