JPH0591223U - Connection structure of shift lever in work vehicle - Google Patents

Abstract

(57) [Abstract] [Purpose] To improve the operability of the gear shift lever and prevent wear of the members to improve durability. A coupling pin 16 on the gear shift lever 6 side is fitted into a fitting hole 19a formed in a coupling plate 19 on the gear shift rod 18 side.
The fitting hole 19a is formed in a substantially triangular shape for fitting and connection with.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a gear shift lever connection structure in a work traveling vehicle such as a passenger rice transplanter.

[0002]

[Problems to be Solved by Prior Art and Invention]

 Generally, this type of work vehicle is provided with a gear shift lever that can perform gear shift operations in first and second directions that are substantially orthogonal to each other, and the gear shift lever has a second manipulation direction at the manipulation end in the first manipulation direction. There is a structure in which a speed change rod for operating the speed change mechanism based on a lever operation is connected, but as in the conventional example shown in FIGS. 9 to 11, a connection provided on the speed change lever 6 side. When the pin 16 is adapted to be fitted and connected to the connecting plate 19 provided on the speed change rod 18 side, the connecting pin 16 and the connecting plate 19 are relatively rotated with the lever operation in the second operation direction. Therefore, it is necessary to provide play in the fitting hole 19a of the connecting plate 19 and to flexibly fit the connecting pin 16 in place. However, in the prior art, since the fitting hole 19a was formed in the elongated hole-shaped fitting groove to allow the operation of the speed change lever 6 in the first operation direction, the speed change lever 6 was operated in the first operation direction. In this case, the connecting pin 16 interferes with the corner portion of the connecting plate 19 in a slidable manner. As a result, smooth lever operation is hindered and operability is impaired. However, there was an inconvenience that the durability decreased, which was a problem.

[0003]

[Means for Solving the Problems]

 The present invention was devised with the object of providing a gear shift lever connection structure in a work vehicle that can eliminate these drawbacks in view of the above-mentioned circumstances. A gearshift lever capable of gearshift operation in the second direction is connected to a gearshift rod that shifts the gearshift mechanism based on lever operation in the second operation direction that is allowed at one operation end of the first operation direction. In a working vehicle in which a connecting pin provided on the shift lever side is fitted and connected to a connecting plate provided on the shift rod side, a connecting pin fitting hole is formed in the connecting plate. , The fitting hole is formed as a long hole facing the first operation direction, and one end side of the fitting hole is narrow to follow the movement of the connection pin in the second operation direction, and the other end side is wide. Tonatsu And it is characterized in that it is formed in a substantially triangular shape. With this configuration, the present invention improves the operability of the gear shift lever and prevents wear of the members to improve durability.

[0004]

【Example】

 Next, an embodiment of the present invention will be described with reference to the drawings. In the drawing, 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 main transmission lever provided on the traveling vehicle body 1. A lever plate 7 fixed to a base end portion of the main transmission lever 6 is provided with a boss portion 8 facing forward and backward. The boss 8 is pivotally fitted to the support shaft 9 so that the main shift lever 6 is supported so that the main shift lever 6 can swing left and right. The facing boss portion 11 is integrally connected, and the boss portion 11 is rotatably fitted to the support shaft 13 protruding from the steering column 12, whereby the main transmission lever 6 is supported while swinging forward and backward. It is being done. That is, the main speed change lever 6 can be rocked back and forth and left and right, and is fixed to the boss portion 11 when the main speed change lever 6 is operated forward and backward at the operation end of the left and right operation range. On the basis of the swing of the 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, and the main speed change lever 6 is operated. When operated in the left-right direction at the rear end position of the forward-backward operation range, the forward-reverse speed change gear 17 in the transmission 3 shifts to the shifter shaft based on the left-right swing of the connecting pin 16 protruding from the lever plate 7. The speed change rod 18 connected via 17a can be operated for speed change. The speed change rod 18 is oriented in the up-down direction and operates to change gears based on the rotation around the axis.

Further, 19 is a connecting plate fixedly mounted on the upper end portion of the speed change rod 18, for fitting the connecting pin 16 protruding downward from the lever plate 7 to the connecting plate 19. Fitting hole 19a is formed. The fitting hole 19a allows the connecting plate 19 to follow the lateral movement of the connecting pin 16 (movement during forward / backward shifting) and allows the forward / backward movement of the connecting pin 16 (moving during stepless shifting). Although it is formed in the shape of a long hole facing the direction, its front end side is formed in a narrow size 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 main transmission lever 6 is operated in the left-right direction at the rear end position of the front-rear operation range, the connecting plate 19 is moved based on the left-right movement of the connecting pin 16 located on the front end side of the fitting hole 19a. Although the gear shift operation of the shift rod 18 is performed by swinging to the left and right, when the main shift lever 6 is operated in the front-rear direction at the operation end in the left-right operation range, the connecting plate 19 is tilted to the left or right. Therefore, the inclined side 19b of the fitting 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. I'm running.

Reference numeral 20 is a lever guide for operating the main shift lever 6, and the lever guide 20 has a guide pin 21 protruding rearward and downward from the lever plate 7 in a substantially kite shape. Although the main transmission lever 6 is operated and guided in a square shape by being fitted and guided in the formed guide groove 20a, the lever guide 20 includes the lower end portion 6a of the main transmission lever 6 facing the front-rear direction and the connecting plate 19 described above. It is arranged vertically in the dead space formed between the and. The lever guide 20 is attached to a bracket 22 protruding from the steering ring column 12.

In the embodiment of the present invention configured as described above, when the main shift lever 6 is operated in the left-right direction at a predetermined position, the connecting pin 16 located on the front end side of the fitting hole 19a is moved left and right. Based on this, the connecting plate 19 swings to the left and right to perform the gear shifting operation of the gear shifting rod 18, but the fitting hole 19a is formed in a triangular shape with its rear end side being wide, so that the main gear shifting lever 6 is When operated in the front-rear direction, the connecting pin 16 moves back and forth in the wide portion of the fitting hole 19a. Therefore, it is possible to prevent the connecting pin 16 from interfering with the connecting plate 20 in sliding contact with the lever operation in the front-rear direction. As a result, the connecting pin 16 and the connecting plate 20 interfere with each other in a circular shape. It is possible to solve the problem that the smooth lever operation is obstructed, and to significantly improve the operability, and at the same time, to prevent the wear of the members as much as possible and to significantly improve the durability.

Moreover, in the embodiment, since the lever guide 20 is arranged in the dead space formed between the lower end portion 6a of the main transmission lever 6 and the connecting plate 19, the space can be effectively utilized. This is not acceptable, and the shift lever mechanism can be made extremely compact.

[0010]

[Operation effect]

 In short, since the present invention is constructed as described above, the connecting pin on the gear rod side is formed in the connecting plate on the gear rod side to form the fitting hole. (2) The connecting plate follows the movement in the operation direction, and the fitting hole is formed in a long hole shape to allow the movement of the connecting pin in the first operation direction, but the one end side is narrow. However, since the other end side is formed in a substantially triangular shape with a wide width, it is possible to prevent the connecting pin from slidingly interfering with the connecting plate when the lever is operated in the first operation direction. Therefore, it is possible to solve the problem that smooth lever operation is hindered due to the interference between the connecting pin and the connecting plate and to significantly improve the operability, or to prevent the wear of members as much as possible. The durability can be significantly improved.

[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 plan view of an essential part of the same.

FIG. 4 is a side view of a main portion showing a connecting structure of a shift lever.

FIG. 5 is a rear view of the same.

FIG. 6 is an enlarged rear view of the same.

7A is a plan view of a connecting plate, FIG. 7B is a front view of a lever guide, and FIG. 7C is a front view of a lever plate.

FIG. 8 is a front view of the transmission.

FIG. 9 is a side view of a shift lever showing a conventional example.

FIG. 10 is a front view of the same.

FIG. 11 is a diagram for explaining the operation of the conventional example.

[Explanation of symbols]

 1 traveling machine body 6 main gear shift lever 16 connecting pin 18 gear shift rod 19 connecting plate 19a fitting hole

Claims (1)

[Scope of utility model registration request] 1. A shift lever capable of shifting in substantially orthogonal first and second directions is shifted based on lever operation in a second operation direction that is allowed at one operation end of the first operation direction. To connect to the speed change rod that operates the mechanism,
In a running vehicle for work in which a connecting pin provided on the speed change lever side is fitted and connected to a connecting plate provided on the speed change rod side, in order to form a fitting hole for the connecting pin in the connecting plate, the fitting is performed. The hole is formed as a long hole facing the first operation direction, and one end side of the hole is narrow so that the connecting plate follows the movement of the connecting pin in the second operation direction, and the other end side is wide. A connecting structure for a shift lever in a work vehicle, which is formed in a triangular shape.