JPH069936B2 - Deflection system for passenger towing vehicles - Google Patents

Description

TECHNICAL FIELD The present invention relates to a diff lock device for a passenger tow vehicle.

[Conventional technology and its problems]

As a prior application of the present invention, there is Japanese Patent Application No. 57-204165 (Japanese Patent Application Laid-Open No. 59-96018). In the prior application, the diff lock device is always operated at the time of turning, and when the vehicle is running on the road. In some cases, the diff lock may operate unexpectedly and become dangerous.

[Means for Solving the Problems]

In order to solve the above-mentioned problems, the present invention has a pair of left and right front wheels 9 and 9 which are transmission-rotated via a diff device 13 provided with a diff lock mechanism 19 and a pair of left and right rear wheels 10 which are appropriately transmission-rotated. In an agricultural passenger tow vehicle equipped with the agricultural work machine 33 at the rear of the passenger car body 1 having 10, a sensor for detecting that the work is in progress is provided, and the steering handle 11 is used only when the sensor detects that the work is in progress. Front wheel 9
When the cutting angle of 9 is cut to a predetermined value or more, the diff lock mechanism 19
It is a differential lock device for a passenger towing vehicle, characterized in that it is configured to operate in a locked state.

[Advantageous effects of the invention]

The present invention is provided with a sensor for detecting that the vehicle is working, and only when the sensor detects that the vehicle is working, the differential lock mechanism 19 is locked when the steering wheel 11 cuts the front wheels 9, 9 above a predetermined angle. Since it is configured to operate in the state, when the steering wheel is turned to change the direction of the front wheels at the time of turning during work, the diff lock on the front wheel side is automatically locked, and there is an effect that the turning can be accurately performed. .

In addition, since the diff lock is not automatically applied when the vehicle is not in operation (when traveling on the road, when stored, etc.), the operator can drive safely and the problems of the conventional example can be solved.

〔Example〕

An embodiment of the present invention will be described in detail with reference to the drawings, in which 1 is a passenger vehicle body, which is composed of constituent members.

2 is a mission case, and 3 is an engine base, which is attached to the front part of the mission case 2.

Reference numeral 4 denotes a chain case, which has bases attached to the left and right sides of the transmission case 2 and extends with its tip end side facing backward and downward.

5 is an engine and 6 is a hood. 7 is an axle case integrally provided with a differential case portion 7a,
A boss is formed in the upper middle of the left and right sides, and the left and right sides are pivotally attached to the engine base 3 via a bracket and a focus so as to be vertically rotatable.

Reference numeral 8 denotes a vertical transmission case, which is attached to both left and right sides of the axle case 7 so as to be freely rotatable around a vertical axis.
Front wheels 9 and 9 are rotatably mounted on the left and right sides of the lower end of the vertical transmission case 8 to be rotatable.

Reference numerals 10 and 10 denote rear wheels, which are attached to the left and right rear ends of the chain case 4 so as to be transmission-rotatable.

Reference numeral 11 is a steering wheel, and 12 is a control seat.

Reference numeral 13 is a diff device, which includes a side bevel gear 16 and a diff case 15 which is integrally provided with the ring bevel gear 14.
16 and the pinion bevel gears 17 and 17 are assembled so as to mesh with each other, and when the differential case 15 is rotated by the rotation of the ring bevel gear 14, the pinion bevel gear 1
The transmission from 7/17 is transmitted to the side bevel gears 16/16, and the drive shafts 18/18 attached to the side bevel gears 16/16 are transmission-rotated. Reference numeral 19 denotes a diff lock mechanism, which is wedged to the drive shaft 18 and integrally rotated, and a spring 20.
The rotor 21 that is free to move against is provided with a claw 21a that engages with a claw 14a formed on the outer end of the boss portion of the ring bevel gear 14, and is rotated between the outer surface of the rotor 21 and the axle case 7. When the lower end of the freely provided shaft 22 is brought into abutment with a notched surface a that is cut in a half-moon shape, and when the lever 23 attached to this shaft 22 is rotated, the rotor 21 is moved in the arrow B direction. The claw 14a and the claw 21a are configured to engage with each other and are differentially locked.

A tie rod 24 is a rod connecting the left and right vertical transmission cases 8 and 8. Reference numeral 25 denotes a pitman arm, which rotates in conjunction with the steering handle 11 and is connected to the one vertical transmission case 8 by a link.

Reference numeral 26 is a solenoid cylinder for actuating the lever 23. When the rotary arm 27 fixed to one of the vertical transmission cases 8 and connected to the pitman arm 25 swings by a predetermined angle (the steering wheel 11 is operated, the front wheel 9 9 is turned over a certain amount from the straight-ahead straight traveling state in FIG.
Touch 9 to turn it on, and at this time, solenoid cylinder 2
The piston 6 is pulled and the lever 23 is rotated to engage the diff lock. The electric circuit at this time is the 8th
Shown in the figure.

30 is a gear change lever.
Moves in the H-shaped guide groove 31 shown in FIG.
When the position is set to a, b, c, d, it is switched to high speed / medium speed / low speed / back speed, respectively, and a switch 32 is provided at the position b which is used as a working speed. As shown in FIG. 8, the switch 32 is turned on when the working speed is a medium speed, and the diff lock is applied only at this time.

Reference numeral 33 denotes an agricultural working machine, which is mounted on the passenger car body 1 through a lift link mechanism 34. And, as an example of this agricultural work, a rice transplanter is attached in the illustrated example. That is,
The structure of this rice transplanter is that the seedling tank 36 that reciprocates left and right is installed above the planting section mission case 35, the seedling planting device 37 is attached to the rear side, and the leveling floats 38 and 39 are provided in the lower center and both sides.・ It is attached with 39.

40 is a sensor switch attached to the bottom plate of the seedling tank 36. When the seedling is placed on this seedling tank 36, O
It is set to turn off when the seedlings run out.

Reference numeral 41 is a line-drawing marker, which is rotated to the machine frame on the rice transplanter side to draw a line to the field scene and draw a line to be attached to the control mark when planting after turning. As shown in FIG. 1, it is swung upward and locked appropriately.

The switch 42 shown in FIG. 4 is interposed between the rotating arm 27 and the axle case 7 so as to be turned on when the front wheels 9 are in a straight-ahead straight state. When is turned on, the piston of the solenoid cylinder 26 is pulled and the lever 23 is rotated to engage the diff lock. The diff lock is always engaged when the front wheels 9 are in a straight-ahead straight state.

Reference numerals 43 and 44 denote side brake pedals configured to apply a brake when the side clutch is “on” or “off” and when the side clutch is “off”. Both pedals 43 and 44 are provided so as to be connectable by a connecting fitting 45. .

To explain the operation of the above example, the change lever 30 is in operation.
Is switched to the b position, which is the working speed, so the switch 32 is ON, and when turning near the ridge, the steering handle 11 is operated to change the direction of the front wheels 9, 9 to a predetermined angle, for example. When the angle is cut by more than θ, switch 28
Alternatively, 29 is turned on to energize the solenoid and retract the piston, which causes the shaft 22 to rotate and engage the diff lock.

Therefore, the pair of left and right front wheels 9, 9 are forcibly set to the same rotation speed, slip is less likely to occur, the traction force is increased, and the vehicle can be reliably turned.

On the other hand, when the vehicle travels on the road, since the change lever 30 is gear-shifted to a position other than the b position which is the working speed, the switch 32 is OFF, and the steering wheel 11 is operated to operate the front wheels 9. Even if the direction is cut by more than the angle θ, the solenoid is not excited and the diff lock is not applied, so that the vehicle can travel safely.

In the above embodiment, the switch 32 for detecting the operation of the shift change lever 30 to the work speed b position is used as the sensor for detecting that the work is in progress, but the following may be considered as another embodiment. To be

Seedling tank 36 when farm work machine 33 is a rice transplanter
It is determined that the seedlings are stored in the work, and the sensor switches 40 attached to the bottom plate of the seedling tank 36 are turned on when the seedlings are placed, as shown in FIG. The differential circuit should be locked with the electric circuit as shown.

Further, when the wire drawing marker 41 is not used, the switch 46a mounted on the machine frame side when it is raised and locked
Is turned off, and as an electric circuit as shown in FIG. 10, when the wire drawing marker 41 is folded in the non-acting position and stored, it is determined that the work is not in progress, and the diff lock is not applied during folding. May be. The switch 46 is turned off by folding the spare seedling tank, folding the protective member of the seedling tank, or folding the center mascot.
b, 46c, and 46d may be provided to have the same configuration.

Further, when the left and right side brake pedals 43, 44 are connected by the connecting fitting 45, it is determined that the work is not in progress, and a switch 47 is provided for turning it off when the connecting metal fittings 45 are connected, so that the diff lock is not applied during this connection. May be.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention. FIG. 1 is an overall side view, FIG. 2 is a plan view thereof, FIG. 3 is a sectional view of an essential part, and FIG. 4 is a plan view of an essential part. FIG. 5 is a front view of the main part, FIG. 6 is a side sectional view of the main part, FIG. 7 is a plan sectional view of the main part, and FIG.
FIGS. 9 and 10 are electric circuit diagrams, and FIG. 11 is a plan view of an essential part. In the figure, reference numeral 1 denotes a passenger car body, 9/9 denotes front wheels, 10/10
Is a rear wheel, 11 is a steering wheel, 13 is a diff device, 19
Is a differential lock mechanism, 23 is an operating lever, 24 is a tie rod, 30 is a change lever, 33 is an agricultural work machine (rice transplanter), 36 is a seedling tank, and b is a work shift position.

Front Page Continuation (72) Inventor Katsu Nomura, 1 Yakura, Tobe-cho, Iyo-gun, Ehime Prefecture Masahiro Taguchi, Inspector, Engineering Department, Iseki Agricultural Machinery Co., Ltd. (56) -24087 (JP, B1)

Claims (5)

[Claims] 1. A vehicle body 1 having a pair of left and right front wheels 9 and 9 which are transmitted and rotated through a diff device 13 provided with a diff lock mechanism 19 and a pair of left and right rear wheels 10 and 10 which are appropriately transmitted and rotated. An agricultural passenger towing vehicle equipped with an agricultural work machine 33 at the rear is provided with a sensor for detecting that the vehicle is working, and the steering wheel 11 is used to cut the cutting angle of the front wheels 9 and 9 only when the sensor detects that the vehicle is working. The diff lock device for a tow vehicle, wherein the diff lock mechanism 19 is operated in a locked state when is cut to a predetermined value or more. 2. The switch according to claim 1, wherein the switch 32 for detecting that the speed change lever 30 of the passenger vehicle body 1 is at the work speed value b is a sensor for detecting that work is in progress. Differential lock device for passenger towing vehicles. 3. A differential lock device for a passenger towing vehicle according to claim 1, wherein a switch 47 for detecting that the left and right side brake pedals 43, 44 are connected is a sensor for detecting that work is in progress. 4. A sensor for detecting that a switch for detecting attachment / detachment / folding of a member that is detached or folded during storage or traveling on the road other than during work is a sensor during work. The differential lock device for a passenger towing vehicle according to item 1. 5. The switch 40 for detecting that seedlings are contained in the seedling tank 36 is a sensor for detecting that the work is in progress when the agricultural work machine 33 is a rice transplanter. Item 1. A diff lock device for a passenger towing vehicle according to item 1.