JPH0680088A - Steering clutch for combine, etc. - Google Patents

Abstract

PURPOSE:To provide forcible lubrication for a steering clutch gear and a steering brake in a simple structure. CONSTITUTION:A steering transmission for a combine, etc., has a center gear 2 fixed to the center along the axis of a steering clutch shaft 1, a steering clutch gear 3, a wet-configuration steering brake 4, etc., pivotally mounted on both right and left sides thereof in a rotatable manner, and a spiral oil groove 5 provided on a fitting face between the steering clutch shaft 1 and the steering clutch gear 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a steering clutch device which is a part of a traveling power transmission device such as a combine, and can be used for a hand tractor and other mobile agricultural machines. A spiral oil groove is formed on the fitting surface of the steering clutch gear to be fitted together.

[0002]

2. Description of the Related Art There is a steering clutch device of a type in which a steering clutch is operated to steer or turn while transmitting left and right traveling wheels or traveling crawlers. The steering clutch gear, the steering brake, etc. are arranged side by side along the axial direction, and when the steering clutch is disengaged, they are rotated separately from the steering clutch shaft. Therefore, oil lubrication between them is necessary. Moreover, oil lubrication in the steering brake must also be provided.

Therefore, the present invention provides the steering brake itself with a simple structure in which a spiral oil groove is formed on the fitting surface between the steering clutch gear and the steering brake and the steering clutch shaft. It also tries to lubricate the friction surface.

[0004]

According to the present invention, a center gear 2 is fixed in the central portion along the axial direction of a steering clutch shaft 1, and steering clutch gears 3 are provided on both left and right sides thereof, and a wet type. The steering brakes 4 etc. are each rotatably mounted on the shaft, and a spiral oil groove 5 is provided on the fitting surface between the steering clutch shaft 1 and the steering clutch gear 3 for steering a combine or the like. The structure of the transmission is used.

[0005]

When the center gear 2 is transmitted and rotated, the steering clutch shaft 1 integrated with the center gear 2 is in a rotating state. Since each of the left and right steering clutch gears 3 is constantly meshed with the transmission gear on the traveling device side and is in a state of constant transmission, the steering clutch gear 3 is operated by the clutch to operate between the center gear 2. When the direction clutch engagement is disengaged, the steering clutch gear 3 on this side is in an independent state from the normally rotating steering clutch shaft 1 and the rotation is stopped, or the steering clutch gear 3 is in a meshing transmission state with the steering clutch gear 3 side. The vehicle is rotated by the traveling device, and steering or turning action is performed. At this time, when the steering brake 4 on the steering clutch disengagement side is braked, rotation of the steering clutch gear 3 is stopped, and the turning action is accurately performed.

In such steering clutch and steering braking action, the steering clutch shaft 1 integrated with the center gear 2 is provided.
Is constantly rotating during transmission, and the helical oil groove 5 formed on the peripheral surface of the steering clutch shaft 1 lubricates the oil, and the steering clutch gear fits on the peripheral surface. 3 to the fitting surface of the steering brake 4 are lubricated, and the outer end of the oil groove 5 communicates with the steering brake 4, so that the friction surface of the steering brake 4 can be forcibly lubricated. The structure is simple and no special lubrication pump or the like is required.

[0007]

EXAMPLE A traveling transmission case 6 has a hydraulic continuously variable transmission HST at one end of an upper input shaft 7 and is switched from a neutral position to a forward / reverse direction by rotation of a drive pulley 8 transmitted from an engine. Moreover, it is transmitted by freely increasing and decreasing the speed. An output shaft 9 of the hydraulic continuously variable transmission HST is connected to the input shaft 7. Reference numeral 10 denotes a power take-off pulley attached to the other end of the input shaft 7, which is a harvesting device 11 or a harvested culm conveying device 1
2nd transmission.

At the lower end of the transmission case 6, traveling shafts 13 are mounted on both left and right sides, and a sprocket 14 is provided at an outer end so that the left and right crawlers 15 can be transmitted. Between the input shaft 7 and the traveling shaft 13, the transmission shaft 1
6, the steering clutch shaft 1, the counter shaft 17, etc. are rotatably mounted, and the transmission gear 18 on the input shaft 7 is attached to the transmission shifter 1.
By switching operation by the operation of 9 and switching mesh with the transmission gear 20 integrated with the transmission shaft 16, the center gear 2 on the steering clutch shaft 1 which is constantly meshed with the transmission gear 21 of the transmission shaft 16 is transmitted through the transmission transmission. You can.

The steering clutch shaft 1 is provided with a center gear 2 in the central portion thereof so as to be integrally rotatable, and steering clutch gears 3 are rotatably provided on both left and right sides of the center gear 2.
A spring 22 applies tension to the center gear 2 side from the outer end side. Steering clutch pawls 23 and 24 capable of engaging in a dog clutch form are formed between the left and right sides of the center gear 2 and the inner end of the steering clutch gear 3, and are normally in an engaged state by the tension of the spring 22 in normal times. is there.

A steering brake boss portion 25 is integrally formed on the outer side of the steering clutch gear 3 and serves as a steering brake. 25 around this steering brake boss,
A wet multi-disc type brake disc 27 is provided between the traveling transmission case 6 and a brake housing 26, which is integrated with the traveling transmission case 6, to form a steering brake 4, and a steering clutch gear 3 is operated by a shifter. , The steering clutch claw 24 is disengaged from the steering clutch 23 by disengaging the steering clutch to disengage the steering clutch, and then further outwardly moved to bring the brake disc 27 into pressure contact with the steering brake 4. It is a configuration to brake.

On the outer peripheral surface of the steering clutch shaft 1 as described above, the steering clutch gear 3 and the steering brake boss portion 2 are substantially formed.
A spiral oil groove 5 having a length of 5 is formed symmetrically with the center gear 2 as a boundary. The spiral direction of the oil groove 5 is formed in the forward direction (FIG. 1) or the reverse direction (FIG. 4) with respect to the rotation direction A of the steering clutch shaft 1. The spring 2
2, the inside of the brake housing 26 having the brake disc 27, etc., and the outer end of the oil groove 5 are communicated with each other through a gap between the steering brake boss portion 25 and the steering clutch shaft 1. By the rotation of the steering clutch shaft 1, in the case of FIG. 1, the oil sucked into the end of the oil groove 5 on the center gear 2 side in the central portion is forcibly sent to the brake housing 26 side, and the brake housing 26 The inner brake disc 27 can be lubricated. In the case of FIG. 4, the brake housing 26 is moved in the direction opposite to that of the case of FIG.
Oil is sent from the inside to the center gear 2 side, and the oil in the transmission case 6 is forcibly drawn into the brake housing 26 to lubricate the brake disc 27.

Counter gears 29 that constantly mesh between the steering clutch gears 3 and the wheel gears 28 of the traveling shaft 13.
Is rotatable with respect to the counter shaft 17, and an oil groove 30 is spirally formed on the peripheral surface of the counter shaft 17 at the fitting portion between the counter gear 29 and the counter shaft 17 to perform a lubricating action. . A shifter shaft 31 has a shifter for operating the steering clutch gears 3 inside the transmission case 6, and a shifter arm 32 outside the transmission case 6. One side of the shifter arm 32 is configured so that the lever arm 33 can be engaged and interlocked. These shifter arms 3
2, the lever arm 33, and the like can be connected to an operation petal lever or the like by a wire or the like to perform a steering clutch or a steering brake operation.

Reference numeral 53 is a thresher, 54 is a feed chain thereof, 55 is a cockpit, and 56 is a lift cylinder for moving up and down the reaper 11 and the like. 5 to 8, a difference from the above example is that the parking petal 36 for the parking brake that fixes the steering brake 4 is fixed to the outer wire 3.
4, a lock lever 37 that is connected via an inner wire 35, a wire receiver 36, and the like, and rotates around a lever shaft 37,
A lock lever mechanism including a lock plate 40 and a spring 38 for operating the dead center between the lock lever 37 and the lock plate 40 is provided.
The engaging portion 41 of is engaged with the engaging pin 42 of the parking petal 36 so that the parking petal 36 can be fixed at the position of the parking brake. When the lock lever 37 is rotated to the rear side B, the spring 38 rotates and urges the lock plate 40 to the rear side due to the dead point of the spring 38.
When the parking petal 36 is stepped on when the parking pin 42 is stepped on the parking pin 42 due to the depression of the parking petal 36, the locking pin 42 can be engaged to fix the parking brake. Further, when the lock lever 37 is rotated to the front side C, the lock plate 40 is rotated and biased to the front side by the spring 38, and once the parking petal 36 is stepped on by a predetermined amount, the engagement pin at the lock position is pressed. The engaging portion 41 is disengaged from 42, the parking petal 36 moves upward, and the fixed state of the parking brake is released.

The tip of the inner wire 35 is connected to one of the shifter arms 51 of the transmission case 6, and the tip of the outer wire 34 is connected to the other by a pin 43 via a wire receiver 36. The connecting pin 4 for connecting the inner wire 35 and the shifter arm 51 to the long hole 44 of the
When 5 is fitted and the parking petal 36 is stepped on, the left and right shifter arms 51 are simultaneously rotated symmetrically around the shaft 52, the left and right steering clutches are disengaged, and the steering brake 4 is in a braking state. Becomes 46 is a push rod 47
In the shifter case that accommodates the clutch shifter, the clutch shifter can be operated in the clutch disengaging direction by pushing the push rod 47 with the shifter arm 51. Reference numeral 48 is a control floor, 49 is a control platform, and 50 is an operation lever. By operating and interlocking a hydraulic operation system different from the shifter arm 51, a push cylinder in the shifter case 46 is operated to perform steering and turning. It has a configuration that can be made.

[Brief description of drawings]

FIG. 1 is a front view of a traveling transmission unit.

FIG. 2 is a front view of a shifter arm unit.

FIG. 3 is a side view of the combine.

FIG. 4 is a front view of a steering clutch shaft portion showing another embodiment.

FIG. 5 is a side view of a parking petal portion.

FIG. 6 is an exploded perspective view of the lock lever portion.

FIG. 7 is a front view of a traveling transmission case part showing another embodiment.

FIG. 8 is a perspective view of a control floor section.

[Explanation of symbols]

 1 Steering clutch shaft 2 Center gear 3 Steering clutch gear 4 Steering brake 5 Oil groove

Claims (1)

[Claims] 1. A center gear 2 is fixed to a central portion along an axial direction of a steering clutch shaft 1, and steering clutch gears 3, wet type steering brakes 4 and the like are respectively provided on both right and left sides of the center gear 2. A steering transmission device such as a combine, which is rotatably mounted on a shaft and has a spiral oil groove 5 provided on a fitting surface between the steering clutch shaft 1 and the steering clutch gear 3.