JPS60148773A - Directional steering device - Google Patents

Abstract

PURPOSE:To prevent the occurrence of unexpected movements and the like in time of braking operation, by installing a spring, which energizes an operated member of a brake in its braking direction, in an interlocking operation part of a directional steering clutch and a brake capable of stopping wheels at both side separately. CONSTITUTION:Inside a transmission case 8, a pinion gear 11 of an input transmission shaft 10 is engaged with a gear 12 of a boss member 13 which is supported by symmetrical intermediate transmission shafts 14 free of relative rotation. In this case, a second collar 21 being slidable in an axial direction is externally fitted in the side of a brake disc 16a of the said shaft 14, while a second spring 22, which energizes the second collar 21 in a braking direction, is internally fitted in a first collar 19. Then, at a time when a clutch 15 gets engaged and a brake 16 is in a nonbraking state, in the case where the clutch 15 is operated for its disengagement, the second coller 21 is moved in a braking direction by the first collar 19 and the second spring 22, pressing each of operated members 16a and 16b, thus the brake 16 is made into a state of being half- braked.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to improvements in a steering clutch and brake linkage and movement operation unit that stop left and right wheels separately. Conventionally, in the above-mentioned steering clutch and brake interlock operation unit, when the wheels are stopped, braking of the brake is started after the clutch is completely disengaged to prevent engine stalling. However, during braking or turning operations, the brakes are not applied and the transmission is not applied, so there is a risk that the aircraft may move unexpectedly due to the weight of the aircraft or fail to make a turn when driving on a slope. there were.

In view of the above circumstances, an object of the present invention is to improve the interlocking operation section of the steering clutch and brake to reliably prevent unexpected movement or turning during braking or turning operations.

・The characteristic configuration of the present invention is that the steering clutch and the brake interlocking operation unit that stops the left and right wheels separately are provided with: ・When the wheels are stopped, the front B1: the brake is in a semi-braking state before the clutch is disengaged. In addition, a spring is provided which biases the operated member of the brake in the braking direction, and the effects thereof are as follows.

The tabs and springs reliably prevent the vehicle from becoming non-braking and non-transmitting, so even if braking, braking, or steering operations are performed on a slope, etc., the machine will not turn when it is unexpectedly moved due to the weight of the aircraft. It has become possible to provide a steering device with excellent safety during driving.

Next, the present invention will be explained in detail based on the drawings.

As shown in Fig. 1, a riding rice transplanter is configured with an engine (6) that drives the left and right front wheels (left and right rear wheels (2)) mounted on the front of the traveling machine. A control section (4) is provided at the rear.The planting device (3) is towed at the rear of the traveling aircraft via an elevating link (5), and a PTO shaft (9
) The power of the engine (6) is transmitted to the planting device (3). (7) and (3) are transmission transmission cases for the front wheels and rear wheels, respectively. The differential device inside (7) transmits power to the left and right front wheels (1), and the transmission case for the front wheels (7) transmits power to the left and right front wheels (1).
) is transmitted to the rear wheel transmission case (8) via the transmission shaft 4 on the underside of the fuselage.

As shown in Figure 2, in the rear wheel transmission case (8), a pinion gear 0υ provided at the end of the input transmission shaft head
meshes with the hook gear α4 spline-fitted to the boss member Q3, and this boss part gear α4 is connected to the left and right intermediate transmission shaft (141
It is supported for relative rotation. Clutch pawls (1511) of the left and right steering clutches 011 are formed on both left and right side surfaces of this boss part control α, respectively, and clutch pawls (1511) of the boss member O'J are formed in the intermediate part of each intermediate transmission shaft U<. (
Clutch piece (15b) that engages with 15a) Clutch pawl (15a) and clutch piece (15b) that engages with K-spline
In addition, a square shaft part (18) is formed on the gear case (toward) side of the intermediate transmission shaft Q4), and the square shaft part (18) ) to 2
Two brake discs (16a) are fitted onto the outside so as to be slidable in the axial direction, and both brake discs (16&)
In between, the intermediate case Q? is slidable in the axial direction. Furthermore, a friction plate (16b) is attached to the wall of the gear case on the side facing the brake disc (16a), and these are the operated members of the brake uQ. The structure is such that a braking effect is produced by the frictional force between the brake disc (15,a) and the friction plate (16b). For the poor left and right intermediate transmission shaft α,
The first collar 4, which is slidable in the axial direction, is connected to the clutch piece (15
b) and is fitted externally, and a first spring 4 is fitted externally that urges the clutch 7f piece (15b') toward the clutch input side on the inside of the first collar (II). A second collar I2υ that is slidable in the axial direction is fitted onto the brake disc (16a) side of the transmission shaft a<, and
A second spring (2) is fitted into the first collar 4 to bias the second collar ■υ in the braking direction.

2nd collar & 1) and brake scream operated member (16a)
.

(16b) are relatively arranged so that the moving distance of the second collar e]) for braking is smaller than the engagement dimension (i) between the clutch pawl (15a) and the clutch piece (15b), The brake 0Q is configured to be in a semi-braking state before the clutch 4 is disengaged.

In other words, as shown in FIG. 8(a), when clutch 4 is disengaged when clutch uG is engaged and brake cries are in non-braking state, il collar 0 connected to clutch piece (15b)
1 and the second collar '-+2υ, which is biased by the second spring 4 fitted in the first collar Φ, moves in the braking direction, and as shown in Figure 3 (b), the clutch 4 is still 8i12 collar Q1) presses the operated members (16a) and (16b) of the brake H in the braking direction, and the biasing force of the second spring (2) brings the brake Ofj into a semi-braking state. It is attached. As shown in Fig. 3 (c), after the clutch OrN is disengaged, the pressing force from the first collar 4 and the pushing force from the second spring (a) compete to bring the brake OQ into a fully braking state. It is configured so that

Next, another embodiment will be described.

Brake disc 1611) on the left and right intermediate transmission shaft aΦ
For the fitting part, spline fitting may be used instead of the square shaft part.

The present invention is intended for repelling equipment for all types of agricultural and construction work equipment, in addition to riding rice transplanters, and can be applied to the left and right wheels of the front wheels, rear wheels, or both.

The position at which the spring (A) acts can be changed as appropriate depending on the specific structure of the interlocking operation section of the clutch 09 and the brake μQ.

[Brief explanation of the drawing]

The drawings show an embodiment of the steering device according to the present invention, FIG. 1 is an overall side view of the riding rice transplanter, and FIG. 2 is an operational diagram showing the operation. (2) Left and right rear wheels, steering clutch, brakes, (16a), (16b)... brake operated members, (a)... ·spring. Agent Patent Attorney Osamu Kitamura

Claims (1)

[Claims] When one wheel (2) is stopped, the brake Q (ψ A steering device i is provided with a spring 4 that biases the operated members (laa) and (16b) of the brake scream in the braking direction so that the steering device is in a semi-braking state.