JPH0713105U - Gear shift lever guide structure for work vehicles - Google Patents

Abstract

(57) [Abstract] [Purpose] It is possible to reliably prevent the aircraft from starting to move due to an erroneous operation of the gear shift lever to significantly improve safety, and to easily recognize the neutral position and improve operability. A shift lever guide structure for a working vehicle in which a neutral guide portion 20d for restricting the operation of the shift lever 6 at a neutral position is formed in a lever guide 20 for guiding the shift lever 6 in operation.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a shift lever guide structure for a work traveling vehicle such as a passenger rice transplanter.

[0002]

[Problems to be Solved by Prior Art and Invention]

 In general, some traveling vehicles for this type perform forward / reverse switching based on the operation of the shift lever in the first operation direction, while operating based on the lever operation in the second operation direction at both ends in the first operation direction. Some have been designed to change the speed of travel. By the way, in such a vehicle for work, when the vehicle body is maintained in the traveling stopped state without stopping the engine, the gear shift lever is set to the intermediate position in the first operation direction where the power transmission is cut off, that is, the neutral position. Although it will be set to the (neutral) position, if the operator mistakenly touches the speed change lever when getting on or off the vehicle, the speed change lever may move out of the neutral position and power transmission may occur. In some cases, the aircraft suddenly started to move.

[0003]

[Means for Solving the Problems]

 The present invention was devised with the object of providing a gear shift lever guide structure for a work traveling vehicle that can eliminate these drawbacks in view of the above-mentioned circumstances. The speed change lever that can be operated in the operation direction and the second operation direction is switched between forward and backward movement based on the lever operation in the first operation direction, and at the intermediate position in the first operation direction, the transmission of traveling power is cut off. In a working vehicle that is linked to a mechanism and a travel speed changing mechanism that changes travel power based on lever operation in the second operation direction at both ends in the first operation direction, It is characterized in that the lever guide that guides is provided with a neutral guide portion for restricting the lever operation in the first operation direction at an intermediate position in the first operation direction. With this configuration, the present invention reliably prevents the aircraft from moving out due to an erroneous operation of the gear shift lever, which significantly improves safety, and facilitates recognition of the neutral position to improve operability. It is also made to be able to measure.

[0004]

【Example】

 Next, an embodiment of the present invention will be described with reference to the drawings. In the drawings, reference numeral 1 denotes a traveling machine body of a passenger rice transplanter. An engine 2, a transmission 3 and the like are mounted on a front portion of the traveling machine body 1, and an elevating link mechanism 4 is mounted on a rear portion of the machine body. The planting work section 5 is connected so as to be able to move up and down.

Reference numeral 6 denotes a speed change lever provided on the traveling vehicle body 1. A lever plate 7 fixed to the base end of the speed change lever 6 is provided with a boss portion 8 facing forward and backward. The gear shift lever 6 is supported so as to be swingable left and right by rotatably fitting the portion 8 to the support shaft 9, and the support shaft 9 is further provided with a boss portion that faces the left and right direction via the plate 10. 11 is integrally connected, and the boss portion 11 is rotatably fitted to the support shaft 13 projecting from the steering column 12 so that the speed change lever 6 can be rocked back and forth. There is. That is, the speed change lever 6 can be swung back and forth and left and right, and when the speed change lever 6 is operated in the front and rear direction (second operation direction) at the operation end of the left and right operation range, the speed change lever 6 is moved to the boss portion 11. On the basis of the swinging motion of the fixed arm 14, the continuously variable transmission 15 provided between the output shaft 2a of the engine 2 and the input shaft 3a of the transmission 3 is operated continuously without any change. When the lever 6 is operated in the left-right direction (first operation direction) at the rear end position of the front-rear operation range, the transmission pin 3 in the transmission 3 is moved based on the left-right swing of the connecting pin 16 protruding from the lever plate 7. The forward / reverse switching mechanism (not shown) is rotated to perform forward / reverse switching. However, the intermediate position in the left / right operation range is neutral (neutral) that cuts off transmission of traveling power. ) Position set There.

Reference numeral 19 denotes a connecting plate fixed to the upper end of the speed change rod 18, and the connecting plate 19 is fitted to a connecting pin 16 protruding downward from the lever plate 7. The hole 19a is formed. The fitting hole 19a is designed to allow the connecting plate 19 to follow the left and right movement of the connecting pin 16 (movement when switching between forward and backward movements) and allow the forward and backward movement of the connecting pin 16 (movement during stepless speed change). It is formed in the shape of a long hole facing the front and back, but its front end side is formed into a narrow width by adding a small amount of play to the diameter of the connecting pin 16, while the rear end side is a wide isosceles triangle. Has been formed. That is, when the shift lever 6 is operated in the left-right direction at the rear end position of the front-rear operation range, the connection plate 19 is moved based on the left-right movement of the connection pin 16 located on the front end side of the fitting hole 19a. While the gear rod 7 is rocked to the left and right to perform the gear shifting operation, when the gear shift lever 6 is operated in the front-rear direction at the operation end within the left-right operation range, the connecting plate 19 is inclined to either the left or right and fitted. The inclined side 19b of the hole 19a is oriented substantially in the front-rear direction, and the connecting pin 16 moves back and forth along the inclined side 19b on the wide side of the fitting hole 19a. A fitting groove 19c is formed on the front end apex for allowing the lever operation backward beyond the rear end position of the front-rear operation range.

Further, 20 is a lever guide that is erected upright at the rear of the lever plate 7 to guide the operation of the shift lever 6, and the lever guide 20 corresponds to the continuously variable shift operation described above. A guide groove 20a having a substantially upside down shape is formed, which has a pair of left and right front and rear operation guide portions 20b and a left and right operation guide portion 20c corresponding to the forward and backward switching operation. The lever guide 20 guides the operation of the shift lever 6 by fitting and guiding the guide pin 21 projecting rearward and downward from the lever plate 7 in the guide groove 20a. At the intermediate position, a groove-shaped neutral guide portion 20d that communicates downward is formed as a notch. That is, the neutral guide portion 20d allows the rearward operation of the speed change lever 6 at an intermediate position in the left and right operation range, and restricts the rearward operation of the speed change lever 6 in the horizontal direction. ing.

Furthermore, reference numeral 22 denotes a fan-shaped cam plate integrally provided on the boss portion 11, and a roller 24 provided at the tip of the swing arm 23 is elastically attached to the tip surface of the cam plate 22. Based on the urging force of the machine 25, they are pressed against each other. That is, since a plurality of cam grooves 22a into which the rollers 24 are fitted are formed on the tip end surface of the cam plate 22, the shift lever 6 is held at the position corresponding to the cam grooves 22a. , It is not allowed to be formed corresponding to the high speed position (H), the medium speed position (M) and the low speed position (L) of the continuously variable transmission, and the cam groove 22a corresponding to the neutral rear position (N) is also formed. Therefore, it is possible to prevent inconveniences such as the shift lever 6 set at the neutral rear position moving freely due to vibration of the machine body or the like.

On the other hand, reference numeral 26 is a cover for covering the traveling machine body 1. The rear portion of the cover 1 is formed with a bulging portion 26a for mounting a seat 27, and the bulging portion 26a is left and right. Fender portions 26b for covering the rear wheel 28 are formed on both sides. In the present embodiment, the rear end portion of the bulging portion 26a and the folder portion 26b are provided with auxiliary steps in a plan view shape. The attachment 29 to be formed is detachably attached. That is, the attachment 29 secures a flat auxiliary work space at the rear end portion of the cover to greatly improve workability and safety such as seedling supply work.

In the embodiment of the present invention configured as described above, when the speed change lever 6 is operated in the front-rear direction at the operation end of the left and right operation range, the continuously variable transmission 15 operates continuously, while the forward and rearward operation is performed. When operating in the left / right direction at the rear end position of the operation range, the forward / reverse switching mechanism is switched, and power transmission is cut off at the intermediate position of the left / right operation range. Is allowed to operate rearwardly of the speed change lever 6 based on the fact that the guide pin 21 is fitted into the neutral guide portion 20d of the guide plate 20. The lateral operation is restricted based on the contact with the neutral guide portion 20d. Therefore, when the shift lever 6 is set to the neutral rear position, even if the operator touches the shift lever 6 when getting on or off the vehicle, the shift lever 6 can be reliably prevented from coming out of the neutral position. As a result, it is possible to completely eliminate the inconvenience that the power transmission continues due to an erroneous operation of the shift lever 6 and the aircraft suddenly starts moving, and the safety of the work vehicle can be significantly improved.

Moreover, when the shift lever 6 is operated from the traveling position to the neutral position, the lever operation in the left-right direction is restricted at the neutral position, so that the neutral position can be easily recognized and the operability can be greatly improved. .

[0012]

[Operation effect]

 In short, since the present invention is configured as described above, forward / reverse switching is performed based on the operation of the speed change lever in the first operation direction, and the second operation direction at both ends of the first operation direction is changed. Although the travel speed change is performed based on the lever operation to the lever, the lever guide for operating the speed change lever has a lever in the first operation direction at an intermediate position in the first operation direction where power transmission is interrupted. Since the neutral guide that controls the lever operation is provided, even if the temporary operator accidentally touches the gear shift lever when the gear shift lever is located at the neutral guide part, the gear shift lever moves in the first operation direction. It does not move and disengage from the intermediate position in the first operation direction, and as a result, it is possible to reliably prevent sudden movement of the aircraft due to erroneous operation and significantly improve safety. .

Moreover, when the shift lever is operated from the traveling position to the neutral position, the lever operation in the first operation direction is restricted when the neutral guide portion is operated. Therefore, the neutral position is changed based on the operation restriction. It can be easily recognized and contributes to the improvement of operability.

[Brief description of drawings]

FIG. 1 is a side view of a riding-type rice transplanter.

FIG. 2 is a side view of the main part of the same.

FIG. 3 is a side view of a main portion showing a connecting structure of a shift lever.

FIG. 4 is an enlarged side view of the main part of the same.

FIG. 5 is an enlarged rear view of the main part of the same.

FIG. 6 is a plan view of a connection plate.

FIG. 7 is a front view of a lever guide.

FIG. 8 is a front view of a cam plate.

FIG. 9 is a plan view of a body cover.

[Explanation of symbols]

 1 Travel Aircraft 6 Gear Shift Lever 20 Lever Guide 20d Neutral Guide 21 Guide Pin

Claims (1)

[Scope of utility model registration request] 1. A shift lever operable in a first operation direction and a second operation direction having different operation directions is switched between forward and backward movement based on a lever operation in the first operation direction, and in the middle of the first operation direction. For work that is connected to a forward / reverse switching mechanism that cuts off the transmission of traveling power at the position and a traveling speed change mechanism that changes traveling power based on lever operation in the second operation direction at both end positions in the first operation direction. In the traveling vehicle, the lever guide for guiding the operation direction of the shift lever is provided with a neutral guide portion for restricting lever operation in the first operation direction at an intermediate position in the first operation direction. Gear shift lever guide structure for cars.