JPH10329564A - Shift operation device for working machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the occurrence of defective transmission in a second shift position and to perform high speed reverse travelling containment by a method wherein allowing movement of a first shift lever to a reverse operation guide groove and a reverse position when a second shift lever is in a high speed position. SOLUTION: A rod-form containment member 32 is provided to move forward and backward in linkage with an auxiliary shift lever 9 such that the reverse operation guide part 30R of a main shift lever 8, positioned in the shift neutral part Nf of a forward operation guide groove 30F when an auxiliary shift lever 9 is in a middle speed position M, namely, in a manner to take refuge to a rear from the reverse operation guide part 30R of a main shift lever 8, to a state to allow movement to the shift neutral part Nr and movement to a rear position R. Concretely, support members 33 are mounted on the right and the left such that a position is variable. By positioning the support member 33 in one of right and left containment positions, with the auxiliary shift lever 9 situated in a high speed position H, the containment member 32 is positioned in an operation attitude to make contact with a main shift lever 8 and in the other containment release position of the right and left containment positions.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shift operating device for a working machine such as a combine machine, and more particularly, to a shift operating device for operating a first shift device. Are provided in a shift neutral position in a state of being displaced in a direction perpendicular to their longitudinal direction, and provided with a shift guide groove for the first shift lever formed in a crank shape and connected in series to the first shift device. Second
A second shift lever for operating a transmission, wherein the first shift lever is in a reverse position, and high-speed reverse restraint means for preventing the second shift lever from being in a high-speed position is provided. .

[0002]

2. Description of the Related Art Conventionally, as shown in FIGS. 8A and 8B, a reverse operation guide groove 30R is formed as a result of an operation of a second shift lever 9 to a high speed position H as shown in FIGS.
The first shift lever 8 is moved in accordance with the operation of the first shift lever 8 to the reverse position R operated from the shift neutral portion Nf of the forward operation guide groove portion 30F to the neutral shift portion Nr of the reverse operation guide groove portion 30R. The link member 40 for operating the second shift lever 9 at the high-speed position H to the middle-speed position M or the low-speed position L by being pressed by the button.

[0003]

However, according to the prior art, basically, by operating the first shift lever to the reverse position, the second shift lever is operated to a shift position other than the high-speed position. Although the desired high-speed reverse movement can be suppressed, the reverse operation can be performed only by operating the first shift lever to the reverse position, but in actuality, the link member is not operated by the second shift device. Even if the first shift lever is located at the reverse position due to an error in the mounting position or a dimensional error of the linking member, the second shift lever is not accurately located at the shift position, and the second shift device is accurately and reliably mounted. In some cases, the shift operation is not performed, and transmission failure such as gear noise in the second transmission is likely to occur.

An object of the present invention is to enable a desired high-speed reverse braking without causing a transmission failure in the second transmission.

[0005]

The features, functions and effects of the first aspect of the present invention are as follows.

[Features] A first transmission lever for operating the first transmission is provided, and the forward operation guide groove and the reverse operation guide groove are displaced in a direction orthogonal to their longitudinal direction to neutralize the shift operation. A second transmission lever for operating a second transmission connected in series with the first transmission; providing a transmission guide groove for the first transmission lever formed in a crank shape by communicating with the first transmission; A shift operating device for a work machine provided with a high-speed reverse check means for preventing a first shift lever from being in a reverse position and a second shift lever from being in a high-speed position, wherein the high-speed reverse check means is constituted. When the second shift lever is at the high speed position, the first shift lever projects into the neutral position of the reverse operation guide groove so as to prevent movement of the first shift lever into the reverse operation guide groove, and Les When the gear is in a shift position other than the high-speed position, the first shift lever operates in conjunction with the second shift lever to retract from the reverse operation guide groove so as to allow movement to the reverse operation guide groove and the reverse position. That is, a check member is provided.

According to the first aspect of the present invention, when the second shift lever is at the high-speed position, the traction member is projected into the neutral shift portion of the reverse operation guide groove portion to enter the reverse operation guide groove portion of the first shift lever. When the second shift lever is in a shift position such as a middle speed position or a low speed position other than the high speed position, the restraint member is retracted from the reverse guide groove portion to prevent the first shift lever from moving. Since the movement to the groove and the reverse position is allowed, the operation of the first shift lever to the reverse position when the second shift lever is at the high-speed position can be prevented, and the high-speed reverse can be reliably suppressed, and When the second shift lever is in a shift position other than the high-speed position, the operation of the first shift lever to the reverse position can be guaranteed.

Further, the first shift lever is restrained from moving toward the reverse operation guide groove by the restraint member, thereby restraining the high-speed reverse movement, and the first shift lever pushes the restraint member to move the second shift lever to the high-speed position. In order to release the high-speed reverse check by preventing the operation to the shift position other than the above, the operation of the second shift lever to the shift position other than the high-speed position is obligatory. The operation of the second shift lever to a shift position other than the high-speed position can be reliably performed.

[Effects] Therefore, according to the first aspect of the present invention, it is possible to reliably operate the high-speed reverse braking, but also to surely operate the second transmission lever to a shift position other than the high-speed position upon release of the high-speed reverse braking. As a result, poor transmission in the second transmission, such as gear noise, can be prevented.

According to the second aspect of the present invention, the features, actions,
The effects are as follows.

[Features] In the features of the first invention,
The high-speed reverse restraining means is capable of switching between a high-speed reverse restraining state and a restraint releasing state allowing movement of the first shift lever to the reverse operation guide groove and the reverse position when the second shift lever is at the high speed position. The point is that it is.

[Operation] Depending on the working conditions of the working machine, there is a case where high-speed reverse may be performed or a case where high-speed reverse is desired.

Focusing on the above points, according to the second aspect of the present invention, the high-speed reverse check can be released.
It can do fast reverse.

[Effects] Therefore, according to the second aspect of the present invention, it is possible to perform an efficient operation according to the use conditions.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIG. 1, a combine, which is an example of a working machine, comprises a self-propelled body 2 provided with a crawler traveling device 1, a threshing unit 3 and a control unit 4, and The reaper 5 is connected to the front of the body 2 so as to be able to move up and down freely.

As shown in FIG. 1, the control section 4 is provided with a driver's seat 4A and an operation panel 4B arranged on the side of the driver's seat. An engine 7 is mounted below the driver's seat 4A.

As shown in FIG. 2, a pair of left and right crawlers 1 are provided. A transmission system from the engine 7 to the crawlers 1 includes a pair of left and right outputs for driving the left and right crawlers 1. A transmission case 13 having a shaft 12 is provided. The transmission case 13 is provided with an input shaft 15 to which power from the engine 7 is transmitted via a traveling clutch 14 using a belt tension type clutch. A gear-type auxiliary transmission 16 as a second transmission for switching the input from the input shaft 15 to high and low, and a first transmission for switching the power from the auxiliary transmission 16 to three forward and one reverse. A main transmission 17 and a pair of left and right steering clutch brakes 18 for separately transmitting power from the main transmission 17 to the output shaft 12 are provided. It has been. That is, the auxiliary transmission 16 and the main transmission 17 are connected in series, and the transmission system is configured to perform nine forward speeds and three reverse speeds by a combination of the operation of the auxiliary transmission 16 and the operation of the main transmission 17. By switching the left and right steering clutch brakes 18 into the engaged state, a straight running state is realized, and by setting one of the left and right steering clutch brakes 18 to the disengaged state, the disengaged side is set to the turning inside. A gentle turn is realized, and the left or right steering clutch brake 18 is turned off to be in a brake state, thereby realizing a sharp turn with the turned side being inside the turn.

As shown in FIG. 2, the main transmission 17 switches a transmission hydraulic valve (not shown) provided in the transmission case 13 to the first forward speed state to transmit the first forward speed for transmitting the first forward speed. When the clutch C1 is engaged, the mode is switched to the forward first speed state in which the power of the auxiliary transmission 16 is transmitted to the steering clutch brake 18 via the engaged forward first speed clutch C1, and the shift hydraulic valve is moved forward. Switch to the 2nd speed state and forward 2 for transmitting the 2nd forward speed
When the speed clutch C2 is engaged, the mode is switched to the forward second speed state in which the power of the auxiliary transmission device 16 is transmitted to the steering clutch brake 18 via the forward operated second speed clutch C2. A third forward speed clutch C3 for transmitting the third forward speed by switching to the third forward speed state
The transmission is switched to the third forward speed state in which the power of the auxiliary transmission 16 is transmitted to the steering clutch brake 18 via the third forward speed clutch C3 that has been engaged, and the shift hydraulic valve is set to the reverse state. By switching the reverse clutch C4 for reverse transmission, the reverse clutch C4 is switched to a reverse state in which the power of the auxiliary transmission 16 is transmitted to the steering clutch 18 via the reverse clutch C4 that has been engaged. Is switched to the shift neutral state and the clutches C1, C2, C3, C4 are all disengaged and operated to switch to the shift neutral state.

The steering clutch brake 18 is provided with a shifter 20 which is operated to be switched to three positions of an on position, an off position, and an off brake position. When the shifter 20 is in the on position, the clutch portion 18C is turned on. When the shifter 20 is in the disengaged position when the shifter 20 is in the disengaged position, the clutch portion 18C is disengaged to operate in the clutch disengaged state, and when the shifter 20 is in the disengaged brake position,
The clutch portion 18C is disengaged and the brake portion 18B utilizing the wet multi-disc brake is operated to be in a clutch disengaged / brake state. The one steering clutch brake 18 is operated by the brake unit 18B in conjunction with the depressing operation of the traveling clutch pedal 6.
Is provided with a brake operation mechanism 21 for operating the brake.

The speed change operation device operates the main speed change device 17 and the sub speed change device 16, and as shown in FIG. 3, passes through a main speed change guide groove 30 formed in a front portion of the operation panel 4B. The main transmission 1
7 is provided with a main transmission lever (first transmission lever) 8 and an auxiliary transmission guide groove 31 formed in the rear portion of the operation panel 4B.
A sub-transmission lever (second transmission lever) 9 for the sub-transmission 16 is provided so as to protrude upward through the through hole, and high-speed reverse braking means is provided.

As shown in FIGS. 4 to 7, the main speed change guide groove 30 has a longitudinal operation guide groove 30R and a longitudinal operation guide groove 30R similarly to the forward operation guide groove 30F in the longitudinal direction. It is a crank-shaped one that is communicated with the transmission neutral parts Nf and Nr in a state of being displaced in a direction orthogonal to the right and left directions, and is provided with a forward operation guide groove part 30F.
, The rear shift neutral position N at which the shift hydraulic valve is switched to the neutral state, the intermediate forward first speed position F1 before and after switching the shift hydraulic valve to the first forward speed state, and before and after switching the shift hydraulic valve to the second forward speed state The main shift lever 8 is guided to each of the intermediate forward second speed position F2 and the forward third speed position F3 for switching the shift hydraulic valve to the third forward speed state, and the forward shift neutral is performed by the reverse operation guide groove 30R. The main shift lever 8 is guided to a position N, a rearward position R for switching the shift hydraulic valve to a reverse state.

As shown in FIG. 4, the main shift lever 8 moves along the forward operation guide groove 30F and the reverse operation guide groove 30R by swinging around the left-right axis P1, and moves to the base end. The switching between the neutral portions Nf and Nr is performed by the elastic deformation of the leaf spring provided.

As shown in FIGS. 4 to 7, the sub-transmission guide groove 31 is linear, and has a front high-speed position H at which the sub-transmission 16 is switched to a high-speed transmission state; The auxiliary transmission lever 9 is guided to a middle speed position M between the front and rear when the device 16 is switched to the medium speed shift state, and a rear low speed position L where the auxiliary transmission device 16 is switched to the low speed shift state.

As shown in FIGS. 4 and 5, the sub-transmission lever 9 is moved along the sub-transmission guide groove 31 by swinging around a left-right axis P2.

The high-speed reverse restraint means includes a main shift lever 8
Is a means for preventing the sub-shift lever 9 from being at the high-speed position H and the sub-shift lever 9 from being at the high-speed position H. As shown in FIGS. Movement of the main transmission lever 8 located in the operation guide groove 30F into the reverse operation guide groove 30R, that is, from the neutral shift portion Nf of the forward operation guide groove 30F to the reverse operation guide groove 30R.
Projecting from the rear into the shift neutral portion Nr of the reverse operation guide groove portion 30R in a state where the movement of the reverse operation guide groove portion 30R is prevented from contacting the shift neutral portion Nr,
When the auxiliary transmission lever 9 is at the middle speed position M, the reverse operation guide portion 30R of the main transmission lever 8 located at the transmission neutral portion Nf of the forward operation guide groove portion 30F, that is, the transmission neutral portion Nr
Rod-like restraint member 3 that moves back and forth in conjunction with the auxiliary transmission lever 9 so as to retract backward from the reverse operation guide groove 30R so as to allow movement to the reverse position R and the reverse position R.
2 is provided.

The means for interlocking the traction member 32 with the auxiliary transmission lever 9 is a means for pivotally connecting the rear portion of the traction member 32 to the auxiliary transmission lever 9, and is provided with a receiving member 33 so as not to swing downward and left and right. Slidably supported by

The high-speed reverse restraining means includes a high-speed reverse restraining state and a reverse operation guide groove 30R for allowing the main shift lever 8 to move to the reverse position R when the auxiliary shift lever 9 is at the high speed position H. It is configured to be freely switchable to a release state. Specifically, as shown in FIGS. 6 and 7, the receiving member 33 is attached to the left and right positions so as to be freely changeable, and the receiving member 33 is positioned at one of the left and right restraining positions, so that the auxiliary transmission lever 9 is moved at a high speed. In a state in which the traction member 32 is positioned at the position H, the traction member 32 is positioned in an operation position in which the traction member 32 can be brought into contact with the main shift lever 8, and the traction member 32 is positioned in the other left or right traction release position, thereby being positioned in a non-contact position. Have been. Reference numeral 34 denotes a bolt with a knob for fixing the receiving member 33 at the restraint position and the restraint release position.

Therefore, by setting the high-speed reverse braking means to the high-speed reverse braking state, the high-speed reverse movement with the main shift lever 8 at the reverse position R and the auxiliary shift lever 9 at the high-speed position H is suppressed. By switching the high-speed reverse restraint means to the restraint release state, the main shift lever 8 is positioned at the reverse position R and the sub-shift lever 9 is shifted to the high speed position H.
High-speed reverse movement is allowed.

The transmission case 13 is provided with a reaper transmission 60 which receives power from the input shaft 15 and is operated by the reaper operation lever 60L. It is configured to transmit power to the vehicle.

The transmission system from the engine 7 to the threshing unit 3 is provided with a threshing clutch 82 using a belt tension type clutch which is biased and turned on and off by a threshing clutch lever 80 provided on the operation panel 4B. The transmission system from the output shaft 61 to the mowing unit 5 includes a mowing clutch 83 using a belt tension type clutch that is biased and turned on and off by a mowing clutch lever 81 provided on the operation panel 4B. It is interposed.

[Alternative Embodiment] In the above-described embodiment, the high-speed reverse restraining means is provided so as to be switchable between a high-speed reverse restraining state and a restraint releasing state. Means that cannot be used may be used.

[Brief description of the drawings]

FIG. 1 is a side view of a combine.

FIG. 2 is a diagram showing a transmission system;

FIG. 3 is a plan view of an operation panel.

FIG. 4 is a perspective view of a shift operation device.

FIG. 5 is a cutaway side view of the speed change operation device.

FIG. 6 is a plan view of the speed change operation device.

FIG. 7 is a plan view of the speed change operation device in a restraint release state.

FIG. 8 is a plan view of a conventional shift operation device.

[Explanation of symbols]

 8 First transmission lever 9 Second transmission lever 16 Second transmission device 17 First transmission device 30 Transmission guide groove 30F Forward operation guide groove 30R Reverse operation guide groove Nf Mid-speed shift portion Nr Mid-shift speed change portion 32 Traction member R Reverse position H High speed position

Claims (2)

[Claims] A first speed change lever for operating a first speed change device is provided, and the forward operation guide groove and the reverse operation guide groove are displaced in a direction orthogonal to a longitudinal direction of the first and second shift neutral portions. A second transmission lever for operating a second transmission connected in series with the first transmission; providing a transmission guide groove for the first transmission lever formed in a crank shape by communicating with the first transmission; A shift operating device for a working machine provided with a high-speed reverse check means for preventing the first shift lever from being in the reverse position and the second shift lever from being in the high-speed position, and constituting the high-speed reverse check means. Protruding into the neutral position of the reverse operation guide groove so as to prevent movement of the first transmission lever into the reverse operation guide groove when the second speed change lever is at the high speed position;
When the second shift lever is in a shift position other than the high-speed position, the first shift lever is interlocked with the second shift lever so as to retract from the reverse operation guide groove so as to allow movement to the reverse operation guide groove and the reverse position. Gear shift operation device of a work machine provided with a check member that operates by force. 2. The high-speed reverse restraining means is in a high-speed reverse restraint state, and a restraint release state in which the first shift lever is allowed to move to the reverse operation guide groove and the reverse position when the second shift lever is at the high speed position. 2. The shift operation device for a working machine according to claim 1, wherein the shift operation device is switchable.