JP2000153720A - Agricultural running vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the weight of a vehicle body by providing right and left front-wheel transmission accommodating portions which accommodate a transmitting portion, attaching rear wheels to the rear axle protruding from the right and left ends of the right and left front-wheel transmission accommodating portions, and providing in a backward-tilted manner an accommodating portion which integrally connects a front-wheel differential accommodating portion and a rear-wheel differential accommodating portion. SOLUTION: Right and left front-wheel transmission accommodating portions 2, 3, 7, 7, 60, 60 accommodating transmitting portions for transmitting power to right and left front wheels 64, 64 are provided on the right and left sides of a front-wheel differential accommodating portion F. The front wheels 64, 64 are attached to front axles 61, 61 protruding from the right and left ends of the right and left front-wheel transmission accommodating portions. Right and left rear-wheel transmission accommodating portions 50, 50 accommodating transmitting portions for transmitting power to right and left rear wheels 55, 55 are provided on the right and left sides of a rear-wheel differential accommodating portion R. The rear wheels 55, 55 are attached to rear axles 51, 51 protruding from the right and left ends of the right and left rear-wheel transmission accommodating portions. An accommodating portion 1 integrally connecting the front-wheel differential accommodating portion F and the rear-wheel differential accommodating portion R is provided in a backward-tilted manner.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention belongs to the technical field of agricultural traveling bodies such as traveling bodies of seedling transplanters.

[0002]

2. Description of the Related Art Conventionally, a front wheel differential device accommodating portion for accommodating a front wheel differential device for splitting power to left and right front wheels so as to be capable of left and right differential is provided on the front side of a vehicle body. A rear wheel differential device housing that houses the rear wheel differential device that branches power differentially is provided at the rear side of the vehicle body, and is transmitted to the left and right front wheels on both left and right sides of the front wheel differential device housing The front wheel is mounted on the front axle protruding from the left and right ends of the left and right front wheel transmission housings that house the transmissions to be transmitted, and the transmission that transmits to the left and right rear wheels is mounted on the left and right sides of the rear wheel differential device housing. There was an agricultural traveling vehicle body in which a rear wheel was attached to a rear axle provided with left and right front wheel transmission housing portions for housing and protruding from both left and right ends thereof. In the agricultural traveling vehicle body, the front wheel differential device accommodating portion and the rear wheel differential device accommodating portion are conventionally arranged so as to be separately arranged in front and rear and connected by a frame, or the front wheel differential device accommodating portion is used. And the rear wheel differential device accommodating portion are both provided in an integrated transmission device accommodating portion disposed on the front side of the vehicle body.

[0003]

As described above, when the front wheel differential device accommodating portion and the rear wheel differential device accommodating portion are connected by the frame, the power transmitting portion for transmitting power to the rear wheel differential device is provided. Must be provided to take out of the housing from the housing of the transmission, and the number of parts increases accordingly, resulting in an increase in cost. On the other hand, if the front wheel differential device housing portion and the rear wheel differential device housing portion are both provided in an integrated transmission device housing portion disposed on the front side of the vehicle body, the rear wheel differential device housing portion is provided from the left and right sides. The transmission portion for transmitting the power to the wheels is configured to be long in the front and rear, and the weight of the vehicle body is heavy.

Therefore, the present invention avoids an increase in the number of parts and an increase in cost due to taking out a transmission portion for transmitting power to the rear wheel differential device from the inside of the housing portion of the transmission device. It is an object to reduce the weight of the vehicle body by minimizing the increase in the weight of the vehicle body due to the front and rear transmission parts for transmitting power from the left and right sides of the device housing to the rear wheels.

[0005]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention accommodates a front wheel differential device that accommodates a front wheel differential device 8 that divides power into left and right front wheels 64 so as to be capable of left and right differential. A rear wheel differential device housing portion R for housing rear wheel differential devices 44, 44 for distributing power to the left and right rear wheels 55, 55 so as to be able to make left and right differential movements while providing a portion F disposed on the front side of the vehicle body.
Is provided on the rear side of the vehicle body, and the front wheel differential device accommodation portion F is provided.
And the rear wheel differential housing R, and the rear wheel differentials 44, 44
And a power transmitting unit 38 for transmitting power to the front wheel differential unit receiving unit F. The right and left front wheels 64, 64 are provided on the left and right sides of the front wheel differential unit receiving unit F.
Left and right front wheel transmission housings 2 and 3 for housing transmissions that transmit power
Front wheels 64, 64 are attached to front axles 61, 61 provided with 7, 7, 60, 60 and protruding from both left and right ends thereof, and left and right rear wheels 55, 5
Left and right front wheel transmission storage units 5 for storing transmission units that transmit power to transmission unit 5
Rear axle 5 provided with 0, 50 and projecting from both left and right ends
Rear wheels 55, 55 are attached to the first and the first wheels 51, and the housing portion 1 for integrally connecting the front wheel differential device housing portion F and the rear wheel differential device housing portion R is provided in a rearwardly lowered posture. Agricultural running body.

[0006]

According to the agricultural running body of the present invention, the front wheel differential device housing portion F and the rear wheel differential device housing portion R are connected to the transmission portion 38 for transmitting power to the rear wheel differential devices 44,44. And the housing is integrally connected by a housing 1 extending in the front-rear and longitudinal directions of the vehicle body, so that a structure for temporarily taking out the transmission for transmitting power to the rear wheel differential from the housing of the transmission can be omitted. It is possible to avoid costly increase due to the reduced number of parts, and to increase the weight of the vehicle body by increasing the length of the transmission part that transmits power from the left and right sides of the rear wheel differential device housing to the rear wheel. Weight is reduced as much as possible, and the weight of the vehicle body can be reduced.

In addition, since the housing portion 1 for integrally connecting the front wheel differential device housing portion F and the rear wheel differential device housing portion R is provided in a rearwardly-lowering position, the weight center of the vehicle can be reduced and the vehicle can be stably formed. Traveling becomes possible.

[0008]

Embodiments of the present invention will be described below. A pair of left and right front axle tubes 2 and 3 are provided in front of the vertical tube 1 facing forward and backward.
Are provided integrally so as to cross each other to form a main gear box 4. In terms of manufacture, the right front axle tube 2 and the vertical tube 1 are integrally made of an aluminum casting, and the left front axle tube 3 is fixed to the side surface of the vertical tube 1 with bolts and nuts. In addition, vertical cylinder 1
Is provided in a rearwardly lowered posture as shown in FIG.

A transmission gear box 5 and a rear wheel transmission gear box 6 are fixed before and after the vertical cylinder 1, and front wheel gear boxes 7, 7 are fixed to outer ends of the front axle cylinders 2, 3, respectively. A differential device 8 is attached to the main gear box 4 at a position where the vertical cylinder 1 and the front axles 2 and 3 intersect.

The transmission gear 5 supports an input shaft 9 facing forward and backward, and two-stage pulleys 10 and 11 are fixed to the front end of the input shaft 9. A pair of pulleys 13, also on the output shaft 12 of the engine,
14 are fixed, belts 15 and 16 are wound around these pulleys 10 and 13 and pulleys 11 and 14, respectively. When the belt is used for transmission, the input shaft 9 rotates at high speed, and when the belt is used for transmission. , The input shaft 9 rotates at a low speed.

The input shaft 9 is connected to a transmission
The gears 17, 18, 19, 20 and 21 are fixed at regular intervals. The transmission shaft 22 is supported in parallel with the input shaft 9, has a rear end extending into the main gear box 4, and a bevel gear 23 fixed at the front end thereof meshes with a ring gear 24 of the differential device 8.

The intermediate shaft 25 is supported by the input shaft 9 and the transmission shaft 22 so as to form a triangle when viewed from the front, and a PTO transmission gear 26 integrally formed of two gears Is mounted so as to move, but not rotate, so that the front gear and the rear gear selectively mesh with the gears 17 and 18, respectively.

Reverse gear 27 in which two gears are integrally formed
Is rotatably mounted on the intermediate shaft 25 and meshes with the gear 19 in front of the reverse gear 27. A transmission gear 28 integrally formed of two gears is attached to the transmission shaft 22 so as to move back and forth but does not rotate, and is mounted on the rear small gear 2.
When the gear 9 meshes with the gear 21 and moves forward, the mesh is disengaged and the large gear 30 on the front side meshes with the gear 20. It is made in

The gear 3 is supported in parallel with the intermediate shaft 25 and meshes with a gear 32 fixed to the intermediate shaft 25.
3 is rotatably mounted. At the tip of the shaft 31,
A clutch pawl 34 is provided, and is configured to engage with or disengage from a pawl 35 extending forward from the gear 33. When this is used in a seedling planting machine, the clutch pawl 34 is configured as a fixed position stop clutch in which the shaft 31 stops at a fixed position.

A PTO shaft 36 extends from the rear end of the shaft 31 and projects behind the transmission gear box 5. Between the shaft 31 and the PTO shaft 36, a safety clutch 37 for stopping transmission due to overload is provided.

A bevel gear 39 is provided at the end of the transmission shaft 38 in the vertical cylinder 1.
Is fixed, and the bevel gear 39 is engaged with the ring gear 24. A bevel gear 41 is attached to the center of the horizontal shaft 40 in the rear wheel transmission gear box 6, and a bevel gear 42 fixed to the rear end of the transmission shaft 38 meshes with the bevel gear 41. The bevel gear 41 has claws 43 on the left and right. A pair of left and right clutches 44 are attached to the horizontal shaft 40 so as to move left and right, and are pushed inward by a spring 45 at the outer end so that the claws 46 mesh with the claws 43. At the outer end of each clutch 44,
When the clutch 4 is moved outward against the spring 45, the clutch 4
4 is provided with a braking device 47 that applies braking.

A pair of left and right transmission shafts 48 are provided in parallel with the horizontal shaft 40, and a pair of gears 49 are fixed to inner ends thereof. The claw 46 is formed in a horizontally long shape, and is engaged with the gear 49 so as not to be separated even if the clutch 44 moves left and right.

A pair of rear wheel cases 50 made of sheet metal extend from left and right sides of the rear wheel transmission gear box 6 obliquely rearward and downward, and support the rear axle 51 at the lower ends. Each transmission shaft 4
8 extend into the rear wheel case 50 to extend the sprocket 5
2 is fixed and the sprocket 5 fixed to the rear axle 51
A chain 54 is wound around the sprocket 3 and the sprocket 52. A pair of rear wheels 55 are fixed to outer ends of the respective rear axles 51.

A pair of differential shafts 56 extend left and right from the differential 8 to reach the respective front wheel gear boxes 7, and bevel gears 5 are provided at the outer ends.
7 is fixed. A pair of transmission shafts 58 extend obliquely downward from the front wheel gear box 7 and a bevel gear 59 fixed thereto is a bevel gear 57.
Mesh with. A pair of steering cases 60 are attached to the lower end of each transmission shaft 58, and the lower end of each steering case 60 supports a front axle 61 projecting outward. Engages with the bevel gear 63 at the inner end. A pair of front wheels 64 are fixed to ends of each front axle 61.

A clutch 65 is attached to the inner end of the left differential shaft 56 so as to move in the axial direction but not rotate, and is pushed outward by a spring (not shown) and pushed inward by a rotary lever 66. Then, the claw is meshed with the claw of the differential device 8 so that the differential device 8 does not perform the differential operation (the differential is locked).

In the traveling vehicle body configured as described above, the rotation of the engine is transmitted from the output shaft 12 to the input shaft 9 by the belt 15 or the belt 16. When this is used for a seedling transplanter, the speed gear 28 is engaged at a low speed during operation. In a seedling planting operation in a good field, the power is transmitted using the high-speed side belt 15, and when turning on a headland or in a seedling planting operation in a poor field, the low-speed side belt 16 is used. To transmit.

During operation, the input shaft 9 rotates during the operation of the gear 20, the large gear 30, the speed change shaft 22, the bevel gear 23 and the ring gear 2.
4 is transmitted in this order to reach the differential device 8, and then divided into left and right, and the differential shaft 56, bevel gear 57, bevel gear 59, transmission shaft 58, bevel gear 62, bevel gear 63 and front axle 61 In this order, the vehicle reaches each front wheel 64.

The rotation of the ring gear 24 is controlled by the bevel gear 3
9. After the transmission shaft 38 and the bevel gear 42 are transmitted in this order to reach the bevel gear 41, they are divided into right and left, and each claw 4
3. Claw 46, gear 49, transmission shaft 48, sprocket 52
The chain 54, the sprocket 53 and the rear axle 51 are transmitted in this order to reach the respective rear wheels 55. That is, the traveling vehicle body advances by the rotation of the respective front wheels 64 and rear wheels 55.

Here, the rotation of the input shaft 9 is controlled by the gear 18 or the gear 17, the PTO transmission gear 26, the intermediate shaft 25, and the gear 32.
The gear 33, the claw 35, the clutch claw 34, the shaft 31 and the safety clutch 37 are transmitted in this order to reach the PTO shaft 36, the seedling planting apparatus is driven, and seedling transplantation is performed.

When the steering handle is operated, the left and right steering cases 60 rotate about the respective transmission shafts 58, and the front wheels 64 are steered. When a difference occurs between the resistances of the left and right front wheels 64, the differential device 8 adjusts the rotation speed of each differential shaft 56.

When the forward direction is largely changed, the right or left clutch 44 is moved outward together with the operation of the steering case 60. Then, the claw 46 separates from the claw 43, and the power transmitted to the right or left rear wheel 55 is cut off. When the clutch 44 is further moved outward, the braking device 47 applies a brake to the clutch 44 to prevent the rear wheel 55 from rotating around, and the traveling vehicle body turns with a small diameter.

Next, when it is desired to run the traveling vehicle quickly on a road with good conditions, the transmission gear 28 is moved backward,
The small gear 29 is engaged with the gear 21 as shown in the figure.
Then, the rotation of the input shaft 29 is controlled by the gear 21 and the small gear 2.
9, the rotation of the front wheel 64 and the rear wheel 55 is faster than in the front.

When the traveling vehicle body is moved backward,
The transmission gear 28 is moved to the forefront, and its large gear 30
With the gear on the rear side of the reverse gear 27. Then, the rotation of the input shaft 9 is transmitted to the transmission shaft 22 via the intermediate shaft 25, and the transmission shaft 22 reverses, and the front wheels 64 and the rear wheels 55 reverse, so that the traveling vehicle body moves backward.

In this agricultural traveling vehicle body, a front wheel differential device accommodating portion F for accommodating a front wheel differential device 8 for splitting power to the left and right front wheels 64 so as to be able to differentially move left and right is arranged on the front side of the vehicle body. And a rear wheel differential device housing portion R for housing rear wheel differential devices 44, 44 for branching power to the left and right rear wheels 55, 55 so as to be able to make left and right differential arrangements, is provided on the rear side of the vehicle body. The front wheel differential device housing portion F and the rear wheel differential device housing portion R are connected to a transmission portion 3 for transmitting power to the rear wheel differential devices 44, 44.
8 and is integrally connected by a housing portion 1 extending in the front-rear and longitudinal directions of the vehicle body, and a transmission portion for transmitting to the left and right front wheels 64 is housed on both left and right sides of the front wheel differential device housing portion F. Left and right front wheel transmission housings 2, 3, 7, 7, 60, 60 are provided, and front wheels 64, 64 are attached to front axles 61, 61 protruding from both left and right ends thereof, and left and right sides of a rear wheel differential device housing R. The rear wheels 55, 55 are attached to the rear axles 51, 51, which are provided with left and right front wheel transmission housings 50, 50 for housing the transmissions for transmitting to the left and right rear wheels 55, 55, and protrude from both left and right ends thereof. The housing 1 for integrally connecting the differential device housing portion F and the rear wheel differential device housing portion R is provided in a rearwardly lowered posture.

Therefore, the agricultural traveling vehicle body accommodates the front wheel differential device accommodating portion F and the rear wheel differential device accommodating portion R, and the power transmitting portion 38 for transmitting power to the rear wheel differential devices 44, 44. The structure is integrally connected by the housing 1 extending in the front-rear and vertical direction of the vehicle body, so that a structure for temporarily taking out the transmission for transmitting the power to the rear wheel differential from the housing of the transmission to the outside can be omitted. It is possible to avoid an increase in cost due to a small number of points, and the weight of the vehicle body increases due to the front and rear transmission parts for transmitting power from the left and right sides of the rear wheel differential device housing to the rear wheels. Is reduced as much as possible, and the weight of the vehicle body can be reduced.

Moreover, since the housing portion 1 for integrally connecting the front wheel differential device accommodating portion F and the rear wheel differential device accommodating portion R is provided in a lower rearward posture, the weight center of the vehicle can be reduced and the vehicle can be stably formed. Traveling becomes possible.

[Brief description of the drawings]

FIG. 1 is a side view of a seedling plant having a traveling vehicle body.

FIG. 2 is a plan view showing a transmission mechanism of the traveling vehicle body.

[Explanation of symbols]

 1: Vertical cylinder 2, 3: Front axle cylinder 7, 7: Front wheel gear box 8: Front wheel differential 38: Transmission shaft 44, 44: Rear wheel differential 50, 50: Rear wheel case 51, 51: Rear axle 55, 55: rear wheel 60, 60: steering case 61, 61: front axle 64, 64: front wheel F: front wheel differential device housing R: rear wheel differential device housing

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Masaru Nomura 1st Hachikura, Tobe-cho, Iyo-gun, Ehime Prefecture Iseki Agricultural Machinery Co., Ltd. Inside

Claims (1)

[Claims] 1. A front wheel differential device accommodating portion F for accommodating a front wheel differential device 8 for splitting power to the left and right front wheels 64 so as to be capable of left and right differential operation is provided on the front side of the vehicle body. A rear wheel differential device housing portion R for housing rear wheel differential devices 44, 44 for branching power to the wheels 55, 55 so as to be able to make left and right differential movements is provided on the rear side of the vehicle body. The portion F and the rear wheel differential device accommodating portion R are integrally connected by a housing portion 1 that accommodates a transmission portion 38 that transmits power to the rear wheel differential devices 44 and 44 and that extends in the front-rear vertical direction of the vehicle body. Left and right front wheel transmission housings 2, 3,.. Which house transmissions for transmitting to the left and right front wheels 64, 64 on both left and right sides of the front wheel differential device housing F.
Front wheels 64, 64 are mounted on front axles 61, 61 provided with 7, 7, 60, 60 and protruding from both left and right ends thereof, and left and right rear wheels 55, 55 are provided on both left and right sides of the rear wheel differential device accommodating portion R.
Left and right front wheel transmission storage units 50 that store the transmission units that transmit power to
50, and a rear axle 51 protruding from both left and right ends thereof,
A rear wheel 55 is attached to the rear wheel 51, and the housing portion 1 for integrally connecting the front wheel differential device housing portion F and the rear wheel differential device housing portion R is provided in a lower rearward posture. Running car body.