JP2000326744A - Operation device of shifter shaft in transmission - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make an operation mechanism of a shifter shaft compact by forming an operation part as an operation plate for actuating the shifter shaft by a slide, and oppositely arranging this operation plate on a shift panel in a transmission for arranging the operation part so as to be connected to the operation lever side and the shifter shaft side. SOLUTION: In a shift part 11 in a moving agricultural machine, a steering wheel frame 16 is installed on the transmission case 1 side in a shift panel, and a longitudinally, laterally and swingably supported shift lever 7 projects upward by penetrating through an upper surface of the steering wheel frame 16. A guide hole for guiding swinging of the shift lever 7 is formed in an upper surface 16a of the steering wheel frame 16. A support member 23 is longitudinally swingably journalled to the transmission case 1 side, and a base end part of the shift lever 7 is swingably journalled to a boss 22 of the support member 23. An operation plate 21 is longitudinally slidably journalled in close vicinity to the steering wheel frame 16 to the upper surface side in the steering wheel frame 16 via a pin 18.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for operating a shifter shaft in a transmission for a rotary drive unit such as a wheel.

[0002]

2. Description of the Related Art Conventionally, a mobile agricultural machine such as a management machine is provided with a rotary drive unit such as a traveling wheel or a rotary for tilling, and the rotary drive unit is driven by an engine. It is driven to rotate by force, but there is a transmission (transmission) between the rotation drive unit and the engine.
In general, the rotation drive unit is driven by being shifted by a transmission.

[0003] As the transmission, a shifter shaft for switching the rotation speed and rotation direction (performing a shift) of the rotation drive unit is provided on the transmission case side, and an operation lever for operating the switching of the rotation drive unit is swingable. Along with
An operation member that is inserted into a plate-shaped operation panel provided with a guide hole for guiding the swing of the operation lever, transmits the swing of the operation lever to the shifter shaft, and operates the shifter shaft. It is publicly known that they are connected to each other. However, the operation member has a relatively complicated structure, and has a disadvantage that the transmission is increased in size, assembly is relatively difficult, and the cost is disadvantageous (cost increase).

[0004]

In order to solve the above-mentioned problems, a shifter shaft operating device in a transmission according to the present invention is provided with a shifter shaft 13 for shifting the rotation drive unit 4 on the transmission case 1 side. An operation lever 7 for operating the shift of the drive unit 4 is provided so as to be swingable, and the operation lever 7
The operation unit is inserted into a plate-shaped operation panel 12 having a guide hole for guiding the swing of the operation lever, transmits the swing of the operation lever 7 to the shifter shaft 13, and operates the shifter shaft 13. In a transmission device connected to the shifter shaft 13 side, the operation unit is a plate-like operation plate 21 for operating the shifter shaft 13 by sliding.
The first feature is that the operation plate 21 is arranged to face the transmission panel 12.

[0005] A second feature is that the pivot point of the shift lever 7 is set at the base end side, and between the base end side and the tip end of the shift lever 7 is supported by an operation plate 21.

[0006]

FIG. 1 is a side view of a management machine which is a cultivator to which a shifter shaft operating device according to the present invention is applied. A transmission case 1, a driving engine 2, and running wheels constituting a body frame are shown. 3, a traveling machine body 5 is composed of a so-called leaf-claw type rotary 4 for tilling, a handle 6, and the like. The operator holds the handlebar 6 projecting rearward and rotates the traveling wheels 3 by the engine 2, thereby causing the body 5 to rotate.
, And the rotary 4 is rotated as the machine body 5 travels, so that the field can be plowed.

The above-mentioned management machine has a structure in which the speed change of the machine body 5 and the speed change of the rotary 4 can be performed by the one shift lever 7 protruding backward from the machine body 5, that is, the machine body. 5 is performed by switching (shifting) the rotation speed and the rotation direction of the wheel 3 which is a rotary drive unit between the travel speed and the travel direction, and the shift of the rotary 4 which is also a rotary drive unit. The ON / OFF of the rotation and the rotation direction can be performed by the shift lever 7.

At this time, the transmission case 1 is disposed behind the engine 2.
The transmission unit (transmission device) 11 for performing traveling (wheel 3) and shifting the rotary 4 as described above is provided with a transmission panel 12 as an exterior, and the transmission unit 11 is operated by the transmission lever 7. The speed change is performed.

That is, from the transmission case 1, a rotary shifter shaft 13 (see FIG. 3) for operating the rotation direction of the rotary 4 and turning on and off (ON, OFF) of the drive, and the rotation direction (running direction) of the wheels 3 are provided. And a shifter shaft 14 (see FIG. 3) for switching the number of rotations (running speed) are projected with their axes substantially parallel to each other, and by swinging the shift lever 7 back and forth and left and right, By operating both shifter shafts 13 and 14, the traveling of the body 5 and the shift of the rotary 4 are performed.

Next, the structure of the transmission section 11 will be described. In the transmission panel 12, a substantially U-shaped handle frame 16 to which the base end side of the handle 6 is attached as shown in FIGS. 2 and 3 is supported and attached to the transmission case 1 side. As will be described later, a speed change lever 7 supported to be able to swing back and forth and right and left is penetrated through the upper surface of the handle frame 16 and protrudes from a plate-shaped panel surface 12 a on the upper surface of the speed change panel 12.

At this time, a guide hole 17 for guiding the swing of the shift lever 7 (for regulating the swing) is formed in the plate-like upper surface 16a of the handle frame 16, but the upper surface of the shift panel 12 (panel). A shift guide (not shown) is also formed on the surface 12a) at a position corresponding to the guide hole 17 of the handle frame 16, and the shift lever 7 projects through the guide hole 17 and the shift guide. Left and right and front and rear swings along the guide hole 17 and the speed change guide are allowed.

The handle frame 16 and the speed change panel 1
2 is attached, the panel surface 12
a and the upper surface 16a of the handle frame 16 are opposed to and close to each other. On the mission case 1 side,
A support member 23 having a boss 22 is pivotally supported so as to be able to swing back and forth, and the base end of the speed change lever 7 is mounted on the boss 22 of the support member 23 so as to be swingable left and right. . That is, the transmission lever 7 is supported on the transmission case 1 side via the support member 23 by the above structure so as to be able to swing back and forth and right and left.

On the other hand, a plate-shaped interlocking member (interlocking plate) 21 is provided on the upper surface side (back surface 16b of the upper surface of the handle frame 16) of the handle frame 16 via pins 18 on the upper surface 16b of the handle frame 16.
The interlocking plate 21 is formed with a left and right guide 24 that allows the shift lever 7 to slide only in the left and right directions and allows the shift lever 7 to pass therethrough. The reference numeral 7 protrudes toward the transmission panel 12 via the left and right guides 24.

That is, the left and right guides 24 have notches 26 formed in a notch shape at the front end of the interlocking plate 21.
It is fixed to the lower surface side of the interlocking plate 21 and is formed by a guide rod 27 positioned before and after the concave portion 26,
The two guide rods 27 support the intermediate portion (between the base end and the distal end) of the transmission lever 7 so as to be slidable left and right from front and rear.

The interlocking plate 21 has an operation member (operation plate) for operating the rotary shifter shaft 13 in a structure to be described later, but below the interlocking plate 21 is substantially parallel to the interlocking plate 21. A plate-shaped arm 32 is disposed facing and close to the arm 32. The arm 32 is configured as an operation member (operation plate) for operating the shifter shaft 14 for traveling speed change, as described later.

That is, the arm 32 is curved in a plan view and passes below the left and right guides 24, but one end 32a of the bracket 32 projects downward from the handle frame 16 (toward the transmission case 1). The other end 32b is connected to the operation end of the shifter shaft 14, and the arm 32 is slid left and right to operate the shifter shaft 14 so that the traveling speed is changed. It is a structure that is performed.

More specifically, a shift lever 7 is provided at a position of the arm 32 opposite to the left and right guides 27.
Slot-shaped front and rear guide 3 that supports the shaft while allowing it to swing back and forth
The transmission lever 7 is provided with the front-rear guide 33 at a base end side of a portion supported by the interlocking plate 21.
, And are slidably supported back and forth. That is, the shift lever 7 is connected to the shift panel 1 via the arm 32, the interlocking plate 21, and the handle frame 16.
2 protrudes to the handle 6 side.

As a result, the interlocking plate 21 is slid forward and backward integrally with the shift lever 7 while the position of the arm 32 is fixed by the front and rear guide 33 when the shift lever 7 swings back and forth. While the position of the interlocking plate 21 is fixed by the guide 24, the arm 32 is slid right and left integrally with the shift lever 7. Since the shift lever 7 is projected from the handle frame 16 via the guide hole 17, it can be operated only along the guide hole 17.

The arm 3 is connected to the rotary shifter shaft 13 of the transmission case 1 via a connecting portion 37 for holding a pin 36 provided at an end of the shifter shaft 13.
8, the other end of the arm 38 is inserted and supported between two projecting portions 39 projecting rearward on the side surface of the connecting plate 21.
The arm 38 is swung back and forth with the back and forth slide 1, and the connecting portion 37 is swung left and right accordingly, whereby the shifter shaft 13 is operated.

The transmission section 11 is constructed as described above. The arm 32 is slid left and right by the left and right swing of the transmission lever 7, and the shifter shaft 14 for traveling speed is slid with respect to the transmission case 1. The traveling speed is changed, the interlocking plate 21 is slid forward and backward by the forward and backward swing of the shift lever 7, the rotary shifter shaft 13 is slid with respect to the transmission case 1, and the rotary 4 is shifted.

In the transmission in the transmission case 1, the traveling speed and the traveling direction (the number of rotations and the rotation direction of the wheel 2) are changed to the reverse, the neutral, and the first speed with the operation of the traveling shifter shaft 14 in one direction. ,neutral,
The setting is such that the gears can be switched in the order of the second speed, and the rotation of the rotary 4 (PTO shaft for the rotary 4) rotates in the reverse rotation, the neutral, and the normal rotation with the operation of the rotary shifter shaft 13 in one direction. It is set so that it can be switched in the order of.

For this reason, the left and right guide portions 17a in the guide hole 17 are provided with the back (R), the neutral (N),
It has the positions of speed (F1), neutral (N), and second speed (F2).
Is set so that the shifter shaft 13 is in the neutral position when the shifter shaft 14 is in the neutral position between the reverse and the first speed. The front and rear guide portions 17b are formed at the position (2).

Thus, only when the shift lever 7 is located at the neutral position (N) between the reverse (R) and the first speed (F1), the shift lever 7 is moved back and forth along the front and rear guide portions 17b. The swing operation can be performed, and the rotation of the rotary 4 can be switched. The front and rear guide portions 17
b is the reverse rotation position (R
R) is provided at the lower end with a forward rotation position (R
F) are provided, and a reverse rotation position (RR),
In each of the forward rotation position (RF), the shift lever can be swingably operated to the first speed (F1) side, and the traveling speed can be changed to the first speed with the rotary 4 rotated forward or reverse.

That is, when the traveling speed is the first speed, FIG.
As shown in FIG. 4A, by setting the shift lever 7 to the F1 position, the vehicle can only run at the first speed without rotating the rotary 4 (in the neutral state of the rotary 4). As shown in FIG.
Is positioned at the R2 position which is continuous from the RF position, so that the rotary 4 rotates forward and travels at the first speed, and as shown in FIG. 4 (c), the shift lever 7 is moved to the R1 position which is continuous from the RR position. By being located at the position, the rotary 4 can be rotated in reverse and run at the first speed.

At this time, in order to set the shift lever 7 to the R1 position or the R2 position, it is necessary to place the shift lever 7 at the RR position or the RF position where the rotary can be rotated forward or reverse while the traveling is in a neutral state.
When the drive of the rotary 4 is started, the traveling machine body 5 is always in a non-traveling state, and the operator can easily handle the traveling machine body 5.

When the rotary 4 is rotated forward, the resistance bar 41 shown in FIG. 1 is moved to the field in conjunction with the operation of the shift lever 7 (the swinging operation toward the lower end in the front and rear guide portions 17b). When the resistance bar 41 is inserted into the field, dashing of the body 5 is prevented.

As described above, the transmission portion 11 is arranged substantially in parallel with the interlocking plate 21 and the arm 32 being close to each other in the up and down direction, and the handle frame 16 of the handle frame 16 which is substantially in close proximity to the plate-shaped panel surface 12. The shifter shafts 13, 14 are provided below and substantially parallel to the upper and lower surfaces 16 b of the handle frame 16 and are slid along the handle frame 16 to operate the shifter shafts 13, 14. , 14 are realized by operating the interlocking plate 21 and the arm 32 with one shift lever 7.

For this reason, the transmission unit 11 (both shifter shafts 1)
3 and 14) are simpler,
Although the number of parts is small and the weight is light, the panel surface 12a, the handle frame 16, the interlocking plate 21, and the arm 32 are stacked at predetermined intervals in the vertical direction. The transmission unit 11 is formed more compact, and the transmission unit 11 itself is formed more compact. At this time, a straight line passing through the centers of both shifter shafts 13 and 14 in side view is also formed on panel surface 12a and handle frame 1.
6, extending substantially parallel to the interlocking plate 21 and the arm 32.

The one end 32a of the arm 32 is slidably supported on the handle frame 16 side so as to be slidable left and right, so that a stable slide support is performed. The (operation unit) can be handled as a unit, which facilitates handling such as assembly. The operation unit is a guide hole 17.
, The shift between the operation stroke and the guide hole is reduced, a stable shift operation can be performed, and the operation feeling of the shift lever 7 is also improved.

As described above, the intermediate portion of the transmission lever 7 is supported by the interlocking plate 21 and the arm 32 between the base end side, which is the pivot of the transmission lever 7, and the distal end. In addition to being able to perform a stable swing operation, there is no need to provide a special support member for supporting the intermediate portion, which is advantageous in terms of cost.

[0031]

According to the structure of the present invention configured as described above, the operation unit is formed of a plate-shaped operation plate,
Since the operation plate is opposed to the operation panel, the operation plate is operated to slide along the operation panel by the operation lever to operate the shifter shaft,
There is an effect that the operation mechanism of the shifter shaft is compact, and the transmission can be configured in a space-saving manner.

At this time, the intermediate portion of the transmission lever is supported by supporting the operation plate between the base end side, which is the pivot point of the transmission lever, and the distal end, so that a stable swing operation can be performed. In addition to this, there is an advantage that the cost can be reduced without specially providing a support member for supporting the intermediate portion, and the structure is simplified.

[Brief description of the drawings]

FIG. 1 is a side view of a management device.

FIG. 2 is a side view of a main part of a transmission unit with a transmission panel removed.

FIGS. 3A and 3B are a plan view of an interlocking plate portion and a plan view of an arm portion.

FIGS. 4 (a), (b), and (c) are plan views showing operating states of an operation unit of a shifter shaft.

[Description of Signs] 1 Transmission case 4 Rotary (rotation drive unit) 7 Shift lever (operation lever) 12 Operation panel 13 Shifter shaft 21 Interlocking plate (operation plate)

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 3D040 AA01 AA03 AB05 AC21 AC24 AC42 AC66 AD04 AE19 3J052 AA18 FB41 GA07 GA16 LA07

Claims (2)

[Claims] 1. A shifter shaft (13) for shifting the rotation of a rotary drive unit (4) is provided on the transmission case (1) side, and an operation lever (7) for operating the shift of the rotary drive unit (4) is swung. A plate-shaped operation panel (1) provided freely and provided with a guide hole for guiding the swing of the operation lever (7).
2), the swing of the operation lever (7) is transmitted to the shifter shaft (13), and the operation parts for operating the shifter shaft (13) are arranged on the operation lever (7) side and the shifter shaft (13) side. In the linked transmission, the operating portion comprises a plate-shaped operating plate (21) for operating the shifter shaft (13) by sliding, and the operating plate (21) faces the transmission panel (12). Operating device for the shifter shaft in the transmission arranged in the vertical direction. 2. The method according to claim 1, wherein the pivot point of the shift lever (7) is set at the base end side, and between the base end side and the tip end of the shift lever (7) is supported by an operation plate (21). Item 2. An operation device for a shifter shaft in the transmission according to item 1.