JPS5938105A - Rolling locking device for front axles - Google Patents

Abstract

PURPOSE:To prevent the rolling of a four-wheel tractor such as a riding rice planter during its straight movement on a field, by providing a locking means to perform automatic locking when the right and left front axles of the tractor are balanced to its body in a lock-set state. CONSTITUTION:When differential locking is performed for rear wheels 4 by operating a differential locking pedal 13 during straight-movement work on a field, a control wire 14 is loosened so that pistons 16 are urged toward front axles 7 by the forces of springs 18. Consequently, a right and a left front wheels 10 are moved up and down. When the right and the left front axles 7 are balanced to a vehicle body frame 1, pins 16 are inserted into pin holes not shown in the drawing, by the urging forces of the spring 18, so that a locked state is estabilished. When the differential locking for the rear wheels 4 is undone by operating the pedal 13, the locking pins 16 are moved out so that an unlocked state is established. According to this constitution, rolling during straight movement on the field is prevented so that operating properties in turning, movement on an ordinary road, etc. are improved.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a rolling lock device for a four-wheeled truck such as a passenger @fa, and a one-piece axle that is attached to the lid.

1-Rakuta, which is used in the field, such as a riding rice transplanter, has a rear skewer wheel that sensitively follows the unevenness of the tiller up and down, so the front middle wheel is fixed to prevent it from rolling from side to side. If the axle is set aside, the effect will be better straight-line performance. However, if the axle is fixed as described above, the steering becomes difficult to turn when making nine turns in the field or when driving on the road, resulting in a decrease in drivability.

Therefore, for example, the J method described in Japanese Utility Model Publication No. 550-5312P has been proposed, but the locking member is of 4R construction or the locking member is lifted up. Since it has a fixed structure by inserting a bottle, it cannot be automatically switched during operation.

The present invention was made based on the above circumstances, so l1
When driving straight ahead at 634 degrees (during work), the front I axle is equipped with a locking mechanism that automatically locks the front I axle to prevent it from rolling left and right to maintain the desired self-propulsion. The purpose of the present invention is to provide a front axle rolling lock device that allows the front axle to roll by releasing the locking means during driving or when driving on a road L, thereby improving drivability. be.

For this purpose, the present invention is designed to attach the front wheels to the front axle, and to attach the front axle to the center of the vehicle body so that the left and right front wheels can be manually operated.
．． The present invention is characterized in that a locking means is provided for the front axle so as to automatically lock the front axle when the front axle becomes horizontally balanced with respect to the vehicle body in the Eltset state.

Hereinafter, one embodiment of the present invention will be specifically described with reference to the drawings. In the figure, reference numeral 1 denotes the body frame of the riding rice transplanter, and a pair of left and right rear wheel transmission cases 3 are mounted on both rear sides of a mission case 2, which forms part of the heavy frame. The transmission case 2 is provided in a shell-shaped manner, and a rear wheel 4 is mounted on the rear pane of each rear wheel transmission case 3. Also, a rear wheel 4 is mounted on the rear pane of each rear wheel transmission case 3. , a center pivot pin 1 is arranged in the front and back direction by a bracket 6, and a front 1 pin 5 is located in the center of the pivot pin 5.
The medium heat first part 8a of the seven signal case 8 of the ~7xle 7 is pivotally mounted. A front wheel 10 is attached to the front axle 1 through the knuckle 9 of the front axle 1, and it can be rotated by operating the handle 11, so it can change direction around the knuckle 9. It has become.

Also, there is a winter differential [heating pedal 13] pivoted under the seat 12, and the arm of the beta 13 has: 1-1~
The inner wire A7 of the mouth wire ear 14 is attached. The control wire 14 extends to the bracket 6 and is connected to a lock pin 1G inserted into a pin hole 15 formed in the bracket 6. The above-mentioned Otsukubin 16 is equipped with a flange 1 (ia), and by the action of a compression coil spring 18 provided between the above-mentioned flange 16a and a spring seat 17 installed on the above-mentioned bracket 6,
It is in elastic contact with the rear wall of the central upper part 8a of the holder. In the case 8 of the 7th section, there is a file I-1 7.
When the throttle 7 is balanced left and right with respect to the vehicle body frame 1,
A lock pin hole 19 is provided that faces the lock pin 1G.

In addition, in the figure, the reference numeral 20 indicates a planting device p21 at the rear of the tractor.
22 is a float provided at the bottom of the above-mentioned transplant (-j installation rj 21), 23 is equipped on the supplementary planting device 1 described in -F, 24 is a planting rod, and 25 is a spool type hydraulic control valve for sensing flow 1 level.

In addition, the differential 1'' pedal 13 is used for deblocking the rear wheels, and when the differential locking operation of the rear wheels is performed by operating the differential 13, the
Loosen 4 and tighten lock pin 16 with spring 18.]
It is designed to be in a state where the power is released and a state where it is locked.

In this configuration, when driving in the field, the differential lock operation of the rear wheels can be controlled by operating the lock petal 13.
j) Gin (when traveling straight), the control wire 114 is loosened, the spring 18 is activated, and the pin 1G is connected to Freon 1 to 7.
FIJ is on Kusuru's side. In this state, when the left and right sides of the front wheels 10 are lowered and the front axle 7 is in left-right balance with respect to the vehicle body frame 1, the pin 16 corresponds to the pin ring 19, and the spring 18 causes the above-mentioned It enters the bottle hole 19 and becomes locked. For this reason, Freon 1-7xul I
I, since there is no [1-ring] left and right, meandering of the front wheels 10 is avoided, and straight-line driving is improved.

J: When turning around in the field or driving on the road, when operating the differential pedal 13 to release the rear wheel j゛fu ITI〖, F'ij simply:''nt [1 −
Tension the inner wheel A7 of the wheel wheel T714 and pull the pin 1G against the spring 18 to return it, so that the pin 16 is removed from the bottle hole 19h), and the front axle 7 can freely roll. This causes one of the front wheels to lift when driving around, riding from 1lIJjJ to the ridge, or from the ridge to the field, or getting on and off the road. There is no risk of climbing, and drivability is improved.

In the embodiment according to FIGS. 1 to 56, the control wire 14 that controls the lock pin 16 is connected to the planting latch lever 2G, and the planting clutch lever 26 is connected to the planting clutch lever 26. When the front axle 1 is in left-right balance with respect to the vehicle body frame 1, the control wire 14 is loosened and the pin 16 is placed in the lock cellar 1-state.When the front axle 1 is in left-right balance with respect to the vehicle body frame 1, the pin 16 is inserted into the pin hole 19. It engages with the other hand.

In addition, in the embodiment described above, the differential 0 pedal 13 or the planted clutch lever 26 is used for rear wheel differential 1 rotation.
, the control wire 14 is connected to set the lock setting timing of the lock pin 16, but the hydraulic lever of the hydraulic cylinder that operates the lowering mechanism 20 is connected to the hydraulic lever of the hydraulic cylinder that operates the lowering mechanism 20, '', the pin 1G may be configured in such an interlocking relationship that the pin 1G is in the lock hit state.

Further, in the above embodiment, the rolling lock of the front axle 7 was achieved by inserting the pin 16 into the pin hole 19, but as in the embodiment shown in FIGS. It is also possible to use a locking method. Here it corresponds to one side of the center pivot pin 5 °C1
A stopper 27 is installed on the racket 6, a 7-shaped lever 28 is pivotally mounted on the opposite side, and the lever 21 is connected to the inner wire of the control wire 14 via a tension spring 29. -Then, here, the relationship is such that a lock-tight state is created with the inner wire being tensioned. When the inner wire 7 is tensioned, the lever 28 is in a closed state with its locking tip in elastic contact with the final case 8, but when the lever 28 is in the state shown in FIG. 8, it is in a locked state.

In this way, according to the present invention, when driving straight in the field, the front axle can be turned to improve the straightness when driving, and when driving around, over ridges, or on the road. , release the lock (in addition to improving maneuverability, it also locks A5 and its locks automatically during driving). An excellent effect can be obtained in that it can be canceled.

[Brief explanation of drawings]

Fig. 1 is a side view showing one embodiment of the present invention, Fig. 2 is a front view of the same main part, Fig. 3 is a side view of the same main part, and Fig. 4 is a side view of another embodiment. FIG. 5 is a front view of the same main part, FIG. 6 is a side view of the same main part, and FIG. 7 is a side view of the main part of another embodiment.
FIG. 8 is a side view of the main parts in a locked state. 1...10 frames, 2...mission case,
3... Rear wheel transmission coos, 4... Rear wheel, 5... Center rotation pin, 6... Bract, 1... Front axle, 8... Final case, 8a...
・Top center, 9...knuckle, 10...front wheel, 1
1... Steering wheel, 12... Seat, 13... Differential 0
Tsukupetal, 14・Muntrolwait7.15...-
Bottle hole, 16...Lock pin, 16a...7 lange, 11...Spring seat, 18...Spring, 1
9...Lock pin hole, 20...Elevating link mechanism, 2
1... Handle attaching device, 22... Flow 1-123...
Seedling tank, 24...planting rod, 25...valve, 2G
... Planting clutch lever, 21 ... Stopper, 28
...Lever, 29...Tension spring. Patent applicant: Iseki Agricultural Machinery Co., Ltd. Representative Patent Attorney Nobu Atsushi Kobashi - Patent Attorney Susumu Kono Figure 5 Figure 6 Figure 7

Claims (1)

[Claims] The front middle wheel is attached to the front axle, and the above flow is provided. 1 - The axle is pivoted at the center of the vehicle body so that the left and right front middle wheels can move up and down. As described above), a rolling lock device for a front axle, characterized in that a locking means is provided for a first axle.