JPS6217299Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a speed change lever device for a frame type tractor in which the body frame extends from the front end to the rear end of the body.

A normal agricultural tractor has a main gear lever, a sub gear lever, a PTO gear lever, etc., and if it is not a frame type tractor,
These shift levers are pivoted to a rotational pivot provided from the transmission case or rear axle case, and from the rotational pivot, the link device to the shifter shaft is exposed on the side of the transmission case or rear axle case. He was forced to do so.

However, by using a frame tractor, the body frame is installed on the side of the body from the front end to the rear end, so this strength-retaining member is used as a cover for the rotational pivot of the gear shift lever and the link device. .

With this configuration, the installation accuracy of the gear change lever is improved, the support of the gear change lever is strengthened, and the appearance is improved by arranging the link device inside the fuselage frame.

The purpose of the present invention is as described above, and the structure of the present invention will be explained based on the structure of the embodiment shown in the attached drawings.

Fig. 1 is a side view of the steering handle and seat area of a frame type tractor. Fig. 2 is a rear view of the PTO gear shift lever 8 and the auxiliary gear shift lever 7. Figure 3 is a plan view of the main gear shift lever 4. It is also a rear view.

A dash board 22 is provided upright on the rear surface of the bonnet 1, and a steering handle 3 is provided upright on the dash board 27. An outer cylinder 3a of the steering handle extends obliquely downward, and a steering gear box 3b is fixedly installed at the lower end.

The main shift lever 4 can be rotated in a direction along the instrument board 22a on the upper surface of the dart board 22, and as shown in FIGS. 3 and 4, a main shift lever guide plate 29 is provided inside the dart board 22. It is being The main shift guide lever plate 29 is configured in an "L" shape when viewed from the rear, and its bottom is fixed to the cylindrical body 6 of the main shift lever shaft 10. The right end of the main shift lever 4 is pivoted to the upper end of the main shift lever shaft so as to be freely rotatable up and down, and is configured to integrally rotate forward, backward, left and right. A biasing spring is provided so that the main shift lever 4 is always biased to the neutral position of the main shift lever guide plate 29, and in order to maintain safety when getting on and off, the neutral position is maintained by a neutral lock lever 5 and a neutral lock fitting 28. A mechanism is provided.

An arm 10a is provided at a portion where the lower end of the main shift lever shaft projects from the cylindrical body 6. Also, the cylindrical body 6
It is fixed to the outer cylinder 3a of the steering handle 3 by a fixing fitting 23 so as not to rotate. The tip of the arm 10a is connected to an inner wire of the operating wire 11, and the other end of the inner wire is connected to the main transmission shifter shaft 12 of the transmission case 13 and the arm 12a. The above is the main shift lever device.

The operating wire 11 is also arranged inside the body frame 9.

Figure 1. In Fig. 2, 7 is the sub-shift lever, 8
is the PTO gear shift lever. The present invention is applied to the sub-shift lever 7 and the PTO shift lever 8.

The sub-shift lever 7 is located at the fender 21 under the seat 2.
It engages with a sub-shift lever guide 33 provided on the front surface of the gear shift lever. Then, the right side body 9 of the fuselage frame 9
A support stand 27 is provided on R, and a pivot shaft 25 is pivotally supported on the support stand 27. Link 18 to arm 17
are connected, link 18 is connected, link 18
is arranged inside the fuselage frame 9R. And the sub-transmission shifter shaft 3 of the transmission case 13
The tip of the link 18 is pivotally connected to an arm 19 that is fixed to the link 4. On the other hand, the PTO gear shift lever 8 is disposed protrudingly on the left side of the seat 2, and is pivotally supported on the left side body 9L of the body frame 9 by a pivot shaft 24. A link 14 is pivotally connected to the arm 8a, and the tip of the link 14 is pivotally connected to an arm 26a of a shifter shaft 26 for PTO.

A PTO transmission case 15 is provided on the rear surface of the transmission case 13, and a PTO shaft protruding from the PTO transmission case 15 is attached to a PTO cover 16.
protrudes inward. When the PTO cover 16 is removed, the PTO shaft protrudes.

Link devices such as the arm 8a, link 14, and arm 26a are connected to the "co" on the left side body 9L of the aircraft frame 9.
It is placed inside the character shape. Reference numeral 20 designates a fender support plate protruding from the fuselage frame 9.

As described above, the present invention provides a frame-type tractor in which a body frame is extended from the front end of the body to the rear end, and the body is supported by the frame, and a rotating pivot portion of the gear shift lever is provided on the body frame.
The link device that connects the gear shift lever to the shifter shaft is placed inside the fuselage frame, so instead of having a casting transmission case or a rotating pivot on the side of the rear axle case as in the past, Since a rotating pivot is provided on frame 9,
There is no need to bend the gear shift lever inward, and the gear lever stands upright, improving operability.
Since no outward bending load is applied to the pivot shaft or the base of the gear shift lever, damage is less likely to occur.

Furthermore, by arranging the link device inside the fuselage frame 9, the aesthetic appearance of the exterior can be improved, and the link device is less likely to bend even if it comes into contact with an obstacle. Also, during assembly, since it is assembled on a straight body frame, it is easy to achieve accuracy.

[Brief explanation of the drawing]

Figure 1 is a side view of the steering handle and seat area of a frame-type tractor, Figure 2 is a rear view of the PTO gear shift lever and the auxiliary gear lever, Figure 3 is a plan view of the main gear lever, and Figure 4 is the same. It is a rear view. 7... Sub-shift lever, 8... PTO shift lever, 9... Airframe frame, 24, 25... Rotation pivot shaft, 14, 18... Link.

Claims (1)

[Scope of utility model registration request] In a frame-type tractor in which a body frame extends from the front end to the rear end of the body and the body is supported by the frame, a rotational pivot portion of a gear shift lever is provided on the body frame, and a link device connects the gear shift lever to a shifter shaft. A gear lever device for a frame type tractor, characterized in that the gear lever device is arranged inside the body frame.