JP2602769Y2 - Brake device for passenger work equipment - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a brake device for a four-wheel drive type riding work machine having a friction clutch type side clutch and a side brake mounted on right and left rear wheel drive units.

[0002]

2. Description of the Related Art Conventionally, a four-wheel drive type riding work machine in which side clutches and side brakes are provided in drive units for left and right rear wheels is already known.

[0003]

The above-mentioned known four-wheel drive type
When the aircraft was stopped, the side clutches of the left and right rear wheels were turned off and the side brakes were operated to stop the aircraft, so when the aircraft was stopped, only the rear wheels were braked and the front wheels were Because it became free, when the weight of the aircraft was heavily loaded on the front wheels as on a downhill, it slipped and was dangerous. Also, if the side clutch is a claw clutch,
The intermittent power was not smooth and the running performance was poor. In order to solve such a problem, the side clutch is made friction type, and when the clutch pedal and the left and right brake pedals are depressed, the side clutch shaft is integrated with the distribution shaft transmitting to the side clutch as shown in FIG. The clutch shaft is supported at a position lower than the distribution shaft, the distribution shaft and the clutch boss are transmitted by gears, and a lock clutch is interposed between the clutch boss and the clutch shaft. And cost increases,
Normally, a passenger work machine is connected to the rear of the work machine, which increases the weight of the rear part of the body, and furthermore, the body is urged to head up by running reaction force, so the body is unstable. Became.

[0004]

According to the present invention, a main clutch 12 for intermittently supplying power to a traveling section, and a friction clutch type side clutch A and a side brake B interlocking with the main clutch 12 are respectively provided for left and right rear wheel driving sections. In a mounted four-wheel-drive riding work machine, a rear-wheel input shaft 22 interlocked with the front wheels 2 drives a distribution shaft 23 that is mounted on the left and right sides in a rear axle case 21. At the end, the clutch shaft 30 is disposed so as to have the same axis as the distribution shaft 23, and the clutch shaft 30 is disposed on the clutch shaft 30 from the distribution shaft 23.
After the gear side clutch A and the clutch shaft 30
While transmitting power to the wheel 3, the clutch shaft
30 provided on its clutch shaft 30
And at least the distribution shaft 2
A lock clutch 5 that locks the clutch shaft 30 with respect to the distribution shaft 23 between one end of the clutch shaft 3 and the clutch shaft 30.
0, and the lock clutch 50 is connected to the main clutch 12.
The above-mentioned problem has been solved by a configuration in which the lock operation is performed in conjunction with the disengagement operation, and the lock clutch 50, the left and right side clutches A, and the left and right side brakes B are arranged on the same axis.

[0005]

When the traveling direction is corrected during the operation, if one of the brake pedals is lightly depressed, the side clutch associated therewith is disengaged and the traveling direction is corrected. Also, when stopping the aircraft, depressing the clutch pedal and both brake pedals activates the side brakes after the left and right side clutches are disengaged, and also activates the lock clutch to unite the clutch shaft and the distribution shaft. , The rear wheels and the front wheels can be braked. The friction clutch type side clutch, side brake and lock clutch are formed by a distribution shaft and a clutch shaft which are arranged on the same axis .
Ri since disposed on the same axis, configuration is greatly simplified, it was possible to reduce the weight of while downsizing.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to a riding rice transplanter shown in the drawings.
Also, the rear wheels 3, 3 are pivotally supported on both sides of the rear, a transmission case 4 is arranged between the front wheels 2, 2, an engine 5 is mounted on an upper part thereof, and a driver's seat 6 is provided on an upper part near the rear, The planting device 8 is attached to the column 7 with the top link 9 and the lower link 10, 10.
Are connected so as to be able to move up and down.

[0007] A main clutch 12 is interposed on the input shaft 11 of the transmission case 4, and a gear attached to the cylinder shaft is connected to a traveling transmission system and a work machine transmission system, and the work machine transmission shaft 13 is provided with a planting device. 8, the final transmission shaft 1 of the traveling transmission system
5 is transmitted to a ring gear 18 of a front wheel differential mechanism 17 interposed between the front wheel drive shafts 16 and 16 and a bevel gear at a front end of a rear wheel transmission shaft 20, and a rear end of the rear wheel transmission shaft 20 is a rear axle case 21. To the rear wheel input shaft 22 protruding forward from the shaft.

[0008] Bevel gear 2 attached to a distribution shaft 23, which is integrally formed and suspended in the rear axle case 21 in the left-right direction.
4b is a bevel gear 2 attached to the rear end of the rear wheel input shaft 22.
4a , only the right-handed pawl clutch 25 of the pawl clutches 25, 25a engaged so as to rotate integrally with both ends of the distribution shaft 23 slides in the axial direction. The pawl is urged toward the rear wheel input shaft 22 side, and its claw is thicker in the radial direction and longer in the axial direction. Also, on the outside of the claw clutches 25, 25a, there are passive claw clutches 27, which always mesh with them.
A friction plate 28, which is a component of a side clutch A composed of a friction clutch, is spline-fitted to the boss portion as shown in FIG. Bosses 31a as shown in FIG.
The clutch case 31 has two cutout grooves 32 into which splines are fitted. The friction plates 33, in which the outer protrusions 32a are slidably fitted into these notch grooves 32, are formed inside. The ends of the clutch shaft 30 are interposed between the friction plates 28 in a state of being received by the ring 34.
Are pressurized and biased by two disc springs 35 via a spacer 36 in contact with the body-attached portion 30a.

A groove 37 formed on the outer periphery of a boss 31a extending outward from the clutch case 31 has a friction plate 3 which is a component of a side brake B composed of a friction brake.
The projections 38a projecting from the inner periphery of 8... Are loosely fitted, and the projections 38 projecting from the outer periphery of the friction plates 40. 40a
Are loosely fitted and interposed between the friction plates 38... Two disc springs 41 received by a ring-shaped plate 42 are interposed in an extended state on the outside, and as a result, The side clutch A and the side brake B could be integrated. A bearing 44 is mounted on a pin at the tip of a shift arm 43a fixed to the lower end of a side clutch shifter shaft 43 rotatably supported on the upper outside of the rear axle case 21. 42 and an upper end of the arm 45
The gear 46 mounted on the outer end of the clutch shaft 30 drives the rear axle 47 via a plurality of reduction gears.

[0010] A lock clutch 50 comprising a pawl clutch spline-fitted to the inner end of the clutch shaft 30 is provided in a bore 48 on the inner end side of the right passive pawl clutch 27. The clutch 25 is a compression spring 2
6 is urged in the disengagement direction by
Only the pawl of the passive pawl clutch 27 meshes with the pawl of the pawl clutch 25 and does not mesh with the pawl of the lock clutch 50. A lock shift shaft 51 is supported on the rear axle case 21 near the lock clutch 50, and a lower end of the lock shift shaft 51 has a shift arm that engages with a step on the outer periphery of the pawl clutch 25. A lock clutch arm 53 is mounted on the upper end.

Next, the operation device will be described. A clutch pedal 55 disposed on the front left side of the driving section is integrally mounted on a shaft 56, and an arm 57 protruding from the shaft 56 is interposed by a spring 58a. One of a pair of left and right brake pedals 59 and 60 disposed on the right side of the driving unit is mounted so as to rotate integrally with the shaft 61, and the other is freely rotatable. And the brake pedals 59 and 60 are attached to the rod 6
4, 64, linked to the left and right arms 45,
The clutch pedal 55 is also linked to the main clutch 12 by a rod 12a.

When one of the brake pedals 59 and 60 is depressed shallowly while working with the above-described riding work machine, first, the shift arm 43 interlocked therewith.
Since a rotates and pushes the clutch case 31 against the disc spring 35 via the plate 42, the side clutch A on that side is disengaged and the transmission to the rear wheel 3 is interrupted, so that the traveling direction is corrected. When the pedal is fully depressed, the side brake B is operated after the side clutch A is disengaged and the rear wheel 3 is stopped, so that the vehicle can be rotated with a small turning radius.

When the vehicle is running on the road, the brake pedals 59 and 60 are fully depressed after the clutch petal 55 is depressed to stop the aircraft.
The main clutch 12 is disengaged, and the transmission of the traveling system and the working machine transmission system is cut off.
When the clutch is depressed, the side brakes B and B are operated, and the lock clutch arm 53 rotates in response to the depression of the clutch pedal 55, and the pawl clutch 25 moves against the compression spring 26 to mesh with the lock clutch 50. As a result, the distribution shaft 23, the left and right clutch shafts 30, 30, and the rear wheel transmission shaft 20 are integrated, so that the final transmission shaft 15 in the transmission case 4 does not rotate, and the front wheel drive shaft 16, , 16 are braked, the road surface is as slippery as concrete, and even when a large load is applied to the front wheels on a downhill, the vehicle can be reliably stopped without slipping. .

Further, the distribution shaft 23 and the clutch shaft 3
0, 30 are on a straight line, and the side clutch A, side brake B, and lock clutch 50 interposed therebetween are also arranged on the same axis as their shafts 23, 30, 30, so that the configuration is extremely simple. The rear axle case 21 can be reduced in size and weight, and the operation of the lock clutch 50, the side clutch A, and the side brake B can be performed smoothly.

[0015]

The present invention is directed to a four-wheeled vehicle in which a main clutch 12 for intermittently supplying power to a traveling section, and a friction clutch type side clutch A and a side brake B for interlocking with the main clutch 12 are mounted on left and right rear wheel driving sections. In a driving type work machine, a rear wheel input shaft 22 interlocked with a front wheel 2 drives a distribution shaft 23 which is suspended left and right in a rear axle case 21, and clutches are provided on both side ends of the distribution shaft 23. Axis 3
0 is arranged in the same axis as the distribution axis 23 , and
A side clutch provided on the clutch shaft 30 from the distribution shaft 23
Power to the rear wheel 3 via the clutch A and the clutch shaft 30.
While the clutch shaft 30 is
Can be braked by the side brake B provided on the switch shaft 30
The clutch shaft 30 is disposed between at least one end of the distribution shaft 23 and the clutch shaft 30.
A lock clutch 50 that locks the lock clutch 50, and locks the lock clutch 50 in conjunction with the disengagement operation of the main clutch 12. The lock clutch 50, the left and right side clutches A, the left and right side brakes B is disposed on the same axis, so that the clutch pedal 55 and the brake pedal 5
When the driver steps on 9, 60, the transmission of the traveling system is cut off and the side brakes B,
B operates, and the lock clutch 50
And the split shaft 23 are connected to form an integral body, and the front wheels are also braked so that the aircraft can be stopped reliably. In particular, these components such as the side clutch A and the side clutch Brake B and lock clutch 5
0 is on the same axis, the construction is significantly simplified, the size and weight can be reduced, and the cost can be reduced. In addition, the distribution shaft 23 is integrally formed with the rear axle 21. Therefore, the bearings are easily supported, the same axis of the left and right clutch shafts 30 is always maintained, and the operation of the lock clutch 50, the side clutch A, and the side brake B can be performed smoothly.

[Brief description of the drawings]

FIG. 1 is a plan view of a steering operation device of a riding rice transplanter.

FIG. 2 is a developed sectional view of a rear wheel drive unit.

FIG. 3 is a cross-sectional view of a main part.

FIG. 4 is a plan view in which a part of a side clutch and a side brake operation unit of a rear wheel is cut away.

FIG. 5 is a sectional view taken along line AA of FIG. 3;

FIG. 6 is a sectional view taken along line BB of FIG. 3;

FIG. 7 is a side view of the riding rice transplanter.

FIG. 8 is a transmission system diagram.

FIG. 9 is a cross-sectional view of a prototype example of a rear wheel drive unit.

[Description of Signs] 2 Front wheel 3 Rear wheel 12 Main clutch 15 Final transmission shaft 16 Front wheel drive shaft 20 Rear wheel drive shaft 21 Rear axle case 23 Distribution shaft 25, 25a Claw clutch 27.27a Passive claw clutch 30 Clutch shaft 36 Spacer 33, 38, 40 Friction plate 41 Disc spring 50 Lock clutch A Side clutch B Side brake

Continued on the front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) B62D 11/04-11/08 B60K 17/34 B60K 41/24

Claims (1)

(57) [Scope of request for utility model registration] 1. A main clutch 12 for intermittently supplying power to a traveling unit, a friction clutch type side clutch A for each of left and right rear wheel driving units, and a side brake B interlocking therewith.
In a four-wheel-drive riding work machine equipped with a rear wheel axle case 2 by a rear wheel input shaft 22 interlocked with the front wheel 2.
1, a drive shaft 23 is driven to the left and right, and a clutch shaft 30 is attached to both ends of the drive shaft 23.
23 and the distribution axis 2
3 to the side clutch A provided on the clutch shaft 30;
Power to the rear wheel 3 via the clutch shaft 30
On the other hand, the clutch shaft 30 is
It can be braked by the side brake B provided above.
Further, a lock clutch 50 for locking the clutch shaft 30 to the distribution shaft 23 is provided at least between one end of the distribution shaft 23 and the clutch shaft 30, and the lock clutch 50 is disengaged from the main clutch 12. A brake device for a riding work machine, wherein a lock operation is performed in conjunction with an operation, and the lock clutch 50, the left and right side clutches A, and the left and right side brakes B are arranged on the same axis.