JPS5934525Y2 - Reverse tillage control device for walk-behind tillers - Google Patents

Description

[Detailed description of the invention] This invention provides a check around the axis parallel to the swing axis of the lever on the base of the swing lever that operates the transmission clutch of the rotary tillage device or on a member connected integrally therewith. By pivotally supporting the rod and changing the position of the rod in the longitudinal direction by the g movement of the lever, the traveling transmission is prevented from being shifted to the reverse state when the clutch is in the engaged state, and , concerning a backward tillage restraining device in a walk-behind cultivator configured to restrain and prevent the clutch from being engaged and operated when the traveling transmission is in the reverse state, and which has a simple structure that effectively utilizes existing members and has a lever control device. The swing limit is regulated to ensure that it can be used satisfactorily over a long period of time.

Embodiments of the present invention will be described in detail below with reference to the drawings.

Figure 1 shows the side view of the walk-behind cultivator, with the front engine 1
, Traveling ξ tension case 2. A pair of left and right propulsion wheels 3,
3. A rotary tiller 7 is connected to the rear of the machine, which includes a steering wheel 4, etc., and is made up of a plurality of tiller claws 6 laterally arranged and pivoted at the lower part of a transmission case 5.

By swinging the speed change lever 8 pivotally supported by the traveling transmission case 2 in the left and right and up and down directions, the forward 2nd speed F1. A traveling transmission is provided that switches between F2 and two reverse speeds R and JR2.

As shown in FIGS. 2 and 3, in this traveling transmission, a pair of upper and lower high-speed forward/reverse shift shift shafts 9a and a low-speed forward/backward shift shift shaft 9b are operated by the shift lever 8. Using the speed change arm 10 that swings up and down and left and right,
The gears are changed by being selectively slid.

Incidentally, a check plate 12 for restraining backward tillage, which comes into contact with a check rod 11 to be described later, is integrally connected to the speed change arm 10.

A vertically swinging lever 13 for operating a transmission clutch (not shown) of the tilling rotary device I is provided on the upper part of the transmission case 5.

As shown in FIGS. 2 and 3, this lever 13 is fixed to a movable cam body 15 that is connected to a shift shaft 14 for clutch operation so that it can rotate around the axis and cannot move relative to the axis. The fixed cam body 16 integrally formed with the transmission case 5 and the movable cam body 1 are
The shift shaft 14 is made to slide by the cam action with the cam 5, and as shown in Fig. 4B, the upper part is the clutch disengaged position (OFF) and the lower part is the clutch engaged position (O
N).

Next, the backward tillage restraining device will be explained.

That is, the check rod 11 is pivotally supported on a swing arm 17 integrally connected to the movable cam body 15 so as to be rotatable about an axis X2 parallel to the swing axis X1 of the lever 13. .

Then, by vertically swinging the lever 13, the rod 11
By changing the position in the longitudinal direction, when the transmission clutch of the rotary tilling device 7 is in the engaged state,
The check rod 11 has a side surface contacting with the check plate 12 to prevent it from swinging backward.

To check and prevent the traveling transmission from being shifted to the reverse state, and when the traveling transmission is in the reverse state, the restraining rod 11 makes Q contact with the rear surface of the restraining plate 12, and the front shifts to the w direction. It is configured to prevent the transmission clutch of the rotary tilling device T from being engaged and operated by the action of preventing this from happening.

Further, a swing arm 17 provided at the rear end of the check rod 11
The upper and lower corners 18a, 18b of the U-shaped metal fitting 11a for connection with
However, as shown in FIG. 4A2, it is configured as a stopper that restricts the swinging limit of the lever 13 by coming into contact with the swinging arm 1T.

In the embodiment, a U-shaped metal fitting 11a, which is a component of the check rod 11, is used as the stopper 18a.

18b, but the stoppers 18a, 1 can be formed by using other means such as bending the rod 11 in a stepped manner.
8b may be configured.

Further, the present invention can be similarly implemented in a form in which the check rod 11 is directly pivoted to the base of the swing lever 13.

In summary, the backward tilling restraint device for a walk-behind cultivator according to the present invention has the above-mentioned structure, and includes a stopper on the rod that restricts the swinging limit of the lever by coming into contact with the lever base or the connecting member. It is characterized by being provided.

That is, as described in the embodiment, by changing the position of the check rod in its longitudinal direction in conjunction with the swinging of the swing lever, backward plowing is checked and prevented, thereby improving safety. The swinging limit of the lever is regulated by a simple improvement that makes effective use of the implanted members, and it has become possible to use it well over long intercostals while reducing the cost of the overall structure.

In other words, as another means of regulating the swing limit of the lever,
Although it may be possible to do this by providing a guide frame to guide the lever, the present invention is advantageous in terms of practical manufacturing because it can achieve the desired purpose with an inexpensive structure that utilizes existing members.

[Brief explanation of the drawing]

The drawings show an embodiment of the backward tilling restraint device for a walk-behind cultivator according to the present invention, FIG. 1 is an overall side view, FIG. 2 is a partially cutaway side view of the backward tilling restraint device, and FIG. 3 is a side view of the backward tilling restraint device. A partially cutaway plan view of the device, and FIG. 4A is a side view of the swing lever mounting portion. 7... Rotary tillage device, 11... Check rod, 13... Biasing lever 17...
Continuous member, 18a. 18b... Stopper, Xl, X2...
・Axis center.

Claims (1)

[Scope of utility model registration request] A check rod 11 is pivoted around an axis X2 parallel to the swing axis X of the lever 130 at the base of a swing lever 130 that operates the transmission clutch of the rotary tiller 7 or a member 17 integrally connected thereto. The rod 1 is supported by swinging the lever 13.
1 in its longitudinal direction, thereby preventing the traveling transmission from being shifted to the reverse state when the clutch is in the engaged state, and by changing the position of the clutch when the traveling transmission is in the reverse state. This is a backward tilling restraining device for a walk-behind cultivator, which is configured to restrain and prevent the lever from entering and being operated. A backward tilling restraining device for a walk-behind tiller, characterized in that stoppers 18a and 18b are provided for regulating the limit of movement.