JPH03297311A - Device for braking in mobile car body - Google Patents

Abstract

PURPOSE:To obtain the subject device, equipped with each pair of left and right front and back wheels installed in the front and back of a machine body, a differential gear provided in front of the axial center of the front wheels for distributing rotation of an engine to the left and right back wheels and transmitting the rotation thereto and a device for braking the back wheels and excellent in balance and maintenability. CONSTITUTION:In a mobile car body having each pair of left and right front and back wheels 4 and 5 provided in the front and back of a machine body 3, a differential gear for distributing rotation of an engine 6 to the left and right back wheels and transmitting the rotation thereto, a pair of braking devices for braking the left and right back wheels 5, the differential gear installed in front of the axial center of the front wheels 4 and the pair of the braking devices provided in the left and right outer ends of a back wheel driving shaft 50 extending to the left and right from the braking devices, the rotation of the engine 6 is divided into the left and right with the differential gear. The machine body is driven and advanced with the back wheel driving shaft extending to the left and right. Either or both of the left and right braking devices are operated to stop the advance or turn the machine body for braking or turning the machine body 3.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a traveling vehicle body such as a riding rice transplanter or an agricultural management machine, and is intended to improve weight balance and maintainability.

(Prior Art) Generally, the rear wheel differential device is installed far behind the front wheels, and the brake device that brakes the left and right rear wheels is located between the rear wheel drive shafts that extend from the differential device to the left and right. established in the department,
The rear wheels are configured to be driven from the outer ends of the respective rear wheel drive shafts.

(Problem to be solved by the invention) Traveling vehicle bodies such as riding rice transplanters and agricultural management machines need to be made lightweight in order to avoid the wheels from hardening the field. Because it is installed,
It is necessary to place the center of gravity closer to the front.

This invention aims to improve weight balance by installing a relatively heavy differential or braking device for the rear wheels in front of the axis of the front wheels, and also connects the braking device to the wheel drive shaft extending from the differential to the left and right. This is installed at the outer end of the pipe to improve maintainability during disassembly and maintenance.

(Means for Solving the Problems) In order to solve the above problems, the present invention provides a pair of left and right front and rear transports 4, 4, 5, which are provided at the front and rear of the fuselage 3, respectively.
5, a differential device 34 that distributes and transmits the rotation of the engine 6 to the left and right rear wheels 5.5, and a pair of braking devices that brake the left and right rear wheels 5.5. 4. A traveling vehicle body characterized in that the pair of braking devices are provided at the left and right outer ends of a rear wheel drive shaft 39.39 that extends from the braking device to the left and right. It was used as a braking device.

(Function) Since the present invention is configured as described above, the aircraft body 3 is
It is supported on the ground by four front wheels 4,4 and rear wheels 5,5. The rotation of the engine 6 is divided into left and right by a differential device 34 located in front of the axis of the front wheels 4.4, and the vehicle is driven forward by a rear wheel drive shaft 39 extending left and right.

When both or one side of the left and right braking devices are operated as necessary to brake or turn the aircraft 3, the aircraft 3 stops moving or turns.

(Effects) Since the present invention is configured as described above, the comparatively heavy rear wheel differential device 34 and the braking device are connected to the front wheels 4,
Since it is located in front of the axis of 4, the center of gravity is closer to the front. Therefore, equipment such as a rice transplanting device or a management device is usually attached to the running vehicle so that it protrudes from the rear, and when these devices are lifted up, the rear balances and the front wheels 4.4 lift up. The disadvantages can be overcome with small balance weights or no balance weights.

Furthermore, since the braking device is provided at the outer end of the rear wheel drive shaft 39, it is easy to disassemble and assemble, and is characterized by easy repair and adjustment.

(Example) Next, this invention will be explained in detail.

As shown in FIG. 1, a machine body 3 is composed of a machine frame 1 and a gear box 2 fixed to the machine frame 1. Front wheels 4, 4 are provided on both sides of the gear box 2, and front wheels 4, 4 are provided on both sides of the rear end of the machine frame 1. Rear wheels 5, 5 are provided.

As shown in FIGS. 1 and 3, the engine 6 and the HST transmission 7 are connected by a shaft 8.

As shown in FIGS. 2 and 3, the main shaft 9 is connected to the H3T transmission 7.
It extends backwards and enters the gear box 2, within which a small gear 10 and a large gear 11 are fixed.

At the rear of the gear box 2, a rotating gear box 12 has a front and rear pivot 12.
a, 12a, and a front wheel differential 13 is provided on the rotation axis.

A transmission shaft 14 is supported parallel to the main shaft 9, and a bevel gear 15 fixed to the rear end is a ring gear 16 of the differential device 13.
are meshed with each other. This speed change shaft 14 has a rotating gear 17
is provided so as to always mesh with the small gear 10, the movable gear 18 meshes with the large gear 11 during its movement, and the pawl 19 on the front side thereof meshes with the pawl 20 on the rear side of the rotary gear 17.

A vertical front wheel gear box 21.21 is fixed to both ends of the rotary gear box 12, supporting a steering shaft 22.22, and a differential bag ff1.
Bevel gears 24.24 on the outside of the front wheel drive shaft 23.degree. 23 extending left and right from f13 mesh with bevel gears 25.25 on the upper ends of the steering shafts 22,22.

A steering gear box 26.26 is attached to the lower end of the steering shaft 22.22, and a bevel gear 27.27 is fixed to the front axle 2.
This front axle 2 meshes with the bevel gear 29.29 of 8.28.
The front wheel 4.4 is fixed to 8.28. In addition, the pitman arm 31 is rotated by the steering handle 30,
A rod 32.32 is adapted to rotate the steering gear box 26,26. In the figure, the rotating gear 12 rotates with respect to the gear box 2 at pivots 12a, 12a, but the two may be integrated.

A transmission shaft 33 is provided parallel to the transmission shaft 14, and a differential device 34 for the rear wheels 5.5 is provided at the end thereof. Gear shift shaft 1
A gear 35 fixed to the transmission shaft 33 meshes with a gear 36 fixed to the rear end of the transmission shaft 33, and a bevel gear 37 fixed to the tip of the shaft 33 meshes with a ring gear 38 of the differential gear 34.

A pair of rear wheel drive shafts 39.39 extend left and right from the differential 34, and bevel gears 40.40 are fixed inwardly at both ends. The center portions of the plurality of friction plates 41.41-... are attached to the cylindrical portion of the bevel gear 40.40 so as to move only in the axial direction, and the plurality of pressure plates 42.42-...・・・
The outer periphery of ... is attached to the inner wall of the gear box 2 so that it does not rotate with the pins 43, 43...-..., and these friction plates 41, 41...-... - and pressure plate 4
2.42...... are alternately combined. A pair of left and right shafts 44.44 are provided on the outside of the pressure plate 42.42, and an eccentric pusher piece 45 is fixed to the pressure plate 42.42.
45, the pressure plates 42, 42, . . . move inward and come into contact with the friction plates 41, 41, .

A pair of brake pedals 46.46 are provided side by side on the right side of the steering handle 30, and the arms at the lower ends of each are rods 47, 47, and the arm 48.4 has an axis 44°44.
It is connected to 8.

A pair of rear gear boxes 49.49 are fixed to the rear end of the machine frame 1 to support a rear axle 50.50, to which the rear wheels 5.5 are fixed. A bevel gear 51.51 is fixed to the rear axle 50.50, a bevel gear 52.52 meshing with this and a bevel gear 53.53 meshing with the bevel gear 40.40 are connected to the rear wheel transmission shaft 54.54. are combined with.

In addition, the friction plates 41, 41-... and the pressure plate 4
The braking device consisting of 2゜42...-...
If it is provided in front of the outer edge of the front wheel 4.4, the disassembly and assembly of this braking device can be performed more easily.

A seedling planting device 55 is connected to the rear of the body 3 by a link 61 to form a seedling planting machine. This seedling planting device 55 consists of a transmission case 56 in the center, a seedling platform 57 that moves from side to side on the transmission case, a float 62 that slides on the mud surface, and a rotating mechanism that cuts off the seedlings on the seedling platform 57. It consists of a seedling planting rod 58 that is pushed into the mud surface. The transmission case 56 also includes a main shaft 9 of the gear box 2.
The rotation is introduced through a propeller shaft 60 with a PTO axis of 5 wheels and 9 wheels. The differential device is not limited to the system shown in the figure, but may be a side clutch system.

When the seedling transplanter configured as above is operated in the field,
The rotation of the engine 6 causes the front wheels 4.4 and rear wheels 55 to rotate and move forward, and the float 62 slides on the mud surface. At this time, the seedling platform 57 moves left and right, and the tip of the seedling planting rod 58 turns in an egg-shaped trajectory when viewed from the side, cutting off each seedling on the seedling platform 57 and placing it on the mud surface. Push it in.

That is, the rotation of the engine 6 is caused by the H3T transmission 7 at the shaft 8.
After being introduced into the gearbox 2, the speed is changed to an appropriate speed and the gearbox 2 enters the gearbox 2 via the main shaft 9. The rotation of the main shaft 9 consists of a small gear 10, a rotary gear 17, a pawl 20, a fly 9, a moving gear 18, and a speed change shaft 1.
4. After passing through the bevel gear 15 and ring gear 16 in this order, it is divided into left and right by the differential device 13, and left and right front wheel drive wheels 23.23, bevel gear 24.24, bevel gear 25.25.
Steering shaft 22.22, bevel gear 27.27, bevel gear 29°2
98 and the front axle 28.28 in this order to reach the front wheel 4.4.

Further, the rotation of the transmission shaft 14 is divided into left and right by the differential device 134 after rotating the gear 35, gear 36, transmission shaft 33, bevel gear 37, and ring gear 38 in this order, and then,
Left and right rear wheel drive shafts 39.39, bevel gears 40.40, bevel gears 53.53, rear wheel transmission shafts 54.54, bevel gears 52.5
2. It reaches the rear wheel 5.5 through the bevel gear 51°51 and the rear axle 50.50 in this order.

When the seedling transplanter moving forward in this manner is to be turned to the left by applying braking to the left rear wheel 5, the left brake pedal 46 is stepped on. Then, the left rod 47 pushes the arm 48, the shaft 44 rotates, the pushing piece 45 pushes the outer pressure plate 42 inward, and the pressure plates 42, 45...
1.41-...-...- is pressed against the friction plate 4
Braking is applied to the rotations of 1.41... When turning to the right, just step on the right brake pedal 46, and when you want to stop the vehicle in a straight line, step on the left and right wheels 46 and 46 at the same time.

[Brief explanation of the drawing]

FIG. 1 is a side view of a traveling vehicle body to which the present invention is applied, FIG. 2 is a partially cutaway plan view thereof, and FIG. 3 is a diagram of its transmission mechanism. The symbols in the figure are as follows. 3 Aircraft 4 Front wheels 5 Rear wheels 34 Differential device 39 Rear wheel drive shaft Representative Eihisa Mizuta

Claims (1)

[Claims] A pair of left and right front and rear wheels 4 provided at the front and rear of the aircraft body 3, respectively.
, 4, 5, 5, the rotation of the engine 6 is changed to the left and right rear wheels 5, 5.
a differential device 34 that distributes transmission to left and right rear wheels 5, 5;
The differential device is provided in front of the axle center of the front wheels 4, 4, and the pair of brake devices are provided on the left and right sides of the rear wheel drive shafts 39, 39 extending left and right from the brake device. A braking device for a traveling vehicle body, characterized in that the braking device is provided at the outer end of the vehicle body.