JPH063699Y2 - Backward tillage control device for mobile agricultural machinery - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to an interlocking device of a traveling speed change mechanism and a rotary speed change mechanism in a mobile agricultural machine for plowing work.

(Prior Art) In order to perform cultivating work with a mobile agricultural machine having traveling wheels on the front side and a rotary on the rear side, while a worker walks at the rear of the machine,
The aircraft is moved forward and the rotary is rotated forward or reverse to cultivate.

When the aircraft is moved backwards, it is dangerous for workers walking in the rear of the aircraft if the rotary is rotating,
As the traveling speed is changed to the reverse, the clutch that disconnects the driving force to the rotary is disengaged to stop the rotary.

(Problems to be Solved by the Invention) According to the present invention, a traveling speed change for changing a traveling direction and a speed and a rotary speed change for switching a rotation direction of a rotary back and forth are provided.
In the structure that can be performed by the operation lever of the book, the rotary shift is performed to a neutral position with which the rotary does not always rotate in the forward direction or the reverse direction with the reverse shift of the traveling shift with a simple structure.

(Means for Solving the Problem) Therefore, in the present invention, the traveling in which the rotation direction of the rotary gearshift rod 3 and the traveling wheel 4 that shifts the rotation direction of the rotary 2 to the gearbox 1 in the forward / reverse direction is changed. Speed change rod 5
And gear shift members 6 and 7 for engaging the gear shift rods 3 and 5 for gear shift operation are arranged on the same axis, and fitted to the gear shift members 6 and 7 in the axial direction. A shift lever 8 which is selectively engaged by sliding is provided, and the shift lever 7 is in a forward (F) or reverse (R) shift position as the traveling shift member 7 rotates to a reverse traveling position. The rotary transmission member 6 and the traveling transmission member 7 are provided with interlocking members 9 and 10 so as to engage with the rotary transmission member 6 and switch the rotary transmission member 6 to the neutral position (N). The interlocking member 11 that comes into contact with the arm portion 37 of the traveling speed change member 7 and the arm portion 35 of the rotary speed change member 6 is provided so that the rotary 2 is always stopped during the backward traveling.

(Operation and Effect of the Invention) In the above configuration, in order to shift the traveling speed, the shifting lever 8 is engaged with the traveling shifting member 7 and the shifting lever 8 is rotated to move the traveling shifting member 7. The travel speed changing rod 5 is moved in and out of the gear box 1 via the transmission. When the rotary 2 is shifted, the shift lever 8 is slid in the axial direction to disengage from the traveling shift member 7 and engage with the rotary shift member 6 to disengage the rotary shift rod 3. It is carried out by moving in and out of the gear box 1.

During a gear shift operation using such one gear shift lever 8, if the traveling gear shift member 7 is rotated to the reverse traveling position while the rotary gear shift member 6 is kept in the normal rotation or the reverse rotation, the interlocking member 9 is formed. , 10 or the interlocking member 11 acts to rotate the rotary speed change member 6 to the neutral position.

As described above, even if the traveling of the traveling wheels 4 is changed to the reverse while the rotary 2 is rotating in the normal direction or the reverse direction, the rotary 2 is changed to a position where the rotary 2 does not rotate in association with the change of the traveling. It is possible to surely prevent the rotary 2 from rotating when the vehicle is moving backward, but such a safety mechanism is added to the simple gear change mechanism using the single gear change lever 8 by adding the interlocking members 10, 10 and 11. This can be done with a simple addition and improvement configuration.

(Embodiment) Next, an embodiment of the present invention will be described with reference to the drawings.

First, the overall configuration of the mobile agricultural machine will be described.

A gear box 1 is provided at the center of the machine body, and an abutment 12 is projected from the gear box 1 toward the front.
A prime mover 13 is mounted on the top, and power is transmitted from the prime mover 13 to the gear box 1 by belt transmission. 14 is a belt cover that covers the belt transmission portion.

Further, a transmission case 15 is provided below the gear box 1, and the transmission case 15 is attached to the axle 16 protruding from the lower end of the transmission case 15.
Each running wheel 4 is attached.

Further, a work machine mounting frame 17 is provided on the rear side of the gear box 1, and a transmission case 18, a retarder cover 19, and a resistance rod 20 are mounted on the work machine mounting frame 17.

A belt transmission case 21 that performs belt transmission with the gear box 1 is attached to the input shaft on the upper end side of the transmission case 18, and a rotary 2 composed of a plowing pawl 23 is attached to the output shaft 22 on the lower end side. .

At the top of the gear box 1 via the mounting base 24,
A rod-shaped steering handle 25 branched left and right is provided so as to project obliquely rearward and upward. A clutch lever 27 for connecting and disconnecting power transmission of a belt transmission portion provided between the prime mover 13 and the gear box 1 is provided on an upper end handle portion 26 of the steering handle 25.
Also, a throttle lever 28 for adjusting the rotation speed of the prime mover 13 and the like are provided.

As described above, the gear box 1 is located at the center of the machine body and has the abutment 12, the transmission case 15, the work machine mounting frame 17, and the steering handle 25 mounted therein, but the drive force input from the prime mover 1 is internally provided. It is divided into an input shaft of a transmission case 15 which is a power transmission part to the traveling wheels 4 and an input shaft of a transmission case 21 which is a power transmission part to the rotary 2, and the rotation speed and the rotation direction to each input shaft are changed. It has a gear mechanism inside.

The gearbox 1 has shafts 3 and 5 projecting laterally upward and downward, and a rotary speed change rod 3 for changing forward / reverse rotation of a rotary 2 and a rotation speed of a traveling wheel 4 are forwardly changed to high / low speed and reverse traveling. The speed change rod 5.

As shown in FIG. 2, as the rotary speed change rod 3 and the travel speed change rod 5 are pushed into the gear box 1 from the most protruded positions, the rotary speed change rod 3 rotates in the reverse (R), neutral (N), and normal directions. (F), and the traveling transmission rod 5 is set to reverse (R), neutral (N), forward first speed (1), neutral (N), forward second speed (2).

Brackets 30 and 31 are attached to the side surface of the gear box 1 near the rotary speed change rod 3 and the travel speed change rod 5 with the boss portions 32 and 33 of the bosses 32 and 33 aligned vertically on the same axis.

The rotary speed change member 6 and the traveling speed change member 7 are pivotally attached to the boss portions 32 and 33 of the brackets 30 and 31, and the speed change lever 8 is pivotally supported through the speed change members 6 and 7. ing.

The rotary speed change member 6 integrally includes an arm portion 35 that engages with the display rod 34 that projects upward from the rotary speed change rod 3, and an interlocking member 9 that bends downward on the opposite side of the arm portion 35. Are configured as

In addition, the traveling speed change member 7 has an arm portion 37 that engages with a display rod 36 projecting upward from the traveling speed change rod 5.
And an interlocking member 10 which is bent upward on the opposite side of the arm portion 37 to engage with and disengage from the interlocking member 9 of the rotary transmission member 6.

The boss portion 32 of the upper bracket 30 has an arm portion 38
And the rotary speed change member 6 is attached to the arm portion 38.
The interlocking member 11 that engages with the arm portions 35 and 37 of the traveling speed change member 7 is pivotally supported by the pin 39.

Reference numeral 40 denotes a gear shift display plate that indicates the gear shift positions of the rotary 2 and the traveling wheels 4.

An engaging portion 41 formed of a spline is provided at a portion where the speed change lever 8 is fitted to the rotary speed change member 6 and the traveling speed change member 7.
And a retaining portion 42 having a larger diameter is formed, and the spring 43
The engaging portion 41 is always engaged with the engaging portion 44 of the traveling speed change member 7. When the speed change lever 8 is pulled up against the spring 43, the engagement portion 41 engages with the engagement portion 45 of the upper rotary speed change member 6, and the rotation of the speed change lever 8 causes the rotary speed change member 6 to move. The rotary direction of the rotary 2 can be changed by rotating.

Next, a shift operation of the traveling wheels 4 and the rotary 2 will be described.

First, the clutch lever 27 of the steering handle 25 is operated to stop the rotation of the gear shift mechanism in the gear box 1.

Since the speed change lever 8 is always engaged with the speed change member 7 for traveling by the spring 43, when the speed change lever 7 is rotated right and left, the speed change member 7 for rotation is rotated and the speed change rod 5 is moved relative to the gear box 1. Can be moved in and out to shift to the first forward speed (1), the second forward speed (2), and the reverse (R). At this time, if the rotary speed change rod 3 is in the forward rotation (F) position, the traveling speed change rod is moved. 5, when the gear shifts to the reverse (R), the interlocking member 10 of the traveling speed change member 7 contacts the interlocking member 9 of the rotary speed change member 6 to rotate the rotary speed change member 6 to rotate the rotary speed change rod. 3 is shifted to the neutral position (N). When the rotary speed change rod 3 is in the reverse rotation position (R), the travel speed change rod 5
When shifting to the reverse (R), the arm portion 37 of the traveling speed changing member 7 rotates the interlocking member 11 to push the arm portion 35 of the rotary speed changing member 6 to move the rotary speed changing rod 3 to the neutral position ( The speed will be changed to N).

When the gearshift lever 8 is pulled up to rotate the rotary 2 forward (F) or reversely (R) while the traveling speed changing rod 5 is in the reverse position (R), the interlocking members 9, 10, 11 reverse to the above. As a result, the traveling speed change rod 5 is changed from the reverse position (R) to the neutral position (N).

As described above, when the vehicle body is moved backward, the rotary speed change rod 3 is always in the neutral position (N) and the rotation of the rotary 2 is stopped. You will be safe despite traveling towards it.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention. FIG. 1 is a partial front sectional view, FIG. 2 is a partial plan view, FIG. 3 is a partial left side view, and FIG. Part of the right side view and FIG. 5 are overall front views. DESCRIPTION OF SYMBOLS 1 ... Gear box, 2 ... Rotary 3 ... Rotary speed change rod, 4 ... Running wheel 5 ... Travel speed change rod 6 ... Rotary speed change member, 7 ... Travel speed change member 8 ... Speed change lever 9, 10, 11 ... Interlocking member

Claims (1)

[Scope of utility model registration request] 1. A gear box 1 is provided with a rotary speed change rod 3 for changing the rotational direction of a rotary 2 forward and backward, and a traveling speed change rod 5 for changing the rotational direction of traveling wheels 4 forward and backward. The speed change members 6 and 7 that engage with the rods 3 and 5 to perform a speed change operation are arranged on the same axis, and the speed change members 6 and 7 are fitted to the speed change members 6 and 7 and slid in the axial direction. Of the rotary transmission member 6 in the forward rotation (F) or the reverse rotation (R) with the rotation of the traveling transmission member 7 to the reverse traveling position. The rotary transmission member 6 to the neutral position (N).
In order to switch between the rotary speed change member 6 and the traveling speed change member 7, the interlocking members 9 and 10 are provided so as to project, and they are brought into contact with the arm portion 37 of the travel speed change member 7 and the arm portion 35 of the rotary speed change member 6. A backward cultivating and restraining device for a mobile agricultural machine, which is provided with an interlocking member 11 so that the rotary 2 is always stopped during backward traveling.