JPH0545123Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The invention relates to rotary working machines.
This invention relates to a structure for holding a cover for preventing scattering of crushed soil in an upward swinging position.

[Prior Art] Taking a tiller as an example of a rotary working machine, a rotary tiller equipped on the tiller is equipped with a swingable cover made of plate material or rubber material to prevent the scattering of crushed soil. Conventionally, a locking structure shown in FIGS. 4 and 5 has been provided as a structure for holding the cover in the upward swinging position.

That is, a T-shaped hook 26 is attached to the rear end of the frame 11 of the rotary tiller so as to be swingable around a horizontal support shaft 25, and a T-shaped hook 26 is attached to the cover 15.
A locking structure is constructed by forming the letter-shaped through hole 15b, and when the cover 15 is pulled up and held, the hook 26 is inserted through the through hole 15b.

[Problems to be solved by the invention] However, if the locking structure is configured as described above, if the cover jumps up significantly while working at a deep plowing depth, the worker's intentions will be affected. On the other hand, there is room for improvement since the hook may be inserted into the through hole and automatically fall into the retained state.

The purpose of the present invention is to obtain a structure that prevents the cover from falling into a holding state naturally even when it is largely jumped up, and holds the cover in an upwardly pulled position only when required by an operator.

[Means for solving the problem] The characteristic configuration of the present invention is that a through hole is formed in the cover for preventing crushed soil from scattering, which is provided in a suspended state and is swingable in the vertical direction. Inserted into the through hole of the cover in the swung position, and
The present invention comprises a rotation locking device having a claw-like portion that locks and maintains the swinging posture of the cover by rotation operation around an axis in a direction perpendicular to the surface of the cover. The actions and effects are as follows.

[Function] When the above characteristic configuration is configured as shown in FIGS. 1 and 2, for example, the claw-like portion 19 of the rotation locking tool S is inserted into the through-hole 15a formed in the cover 15. setting the rotational phase of the section 19, and
Locking and holding is possible only by changing the rotational phase of the claw-like portion 19 after the claw-like portion 19 is inserted into the through-hole 15a. cover 15 even if they match
is not naturally locked.

In other words, since the rotation locking device S locks the cover 15 only by two consecutive operations, the spring 18 for pulling the claw-like portion 19 as shown in the figure
The structure does not have a through hole 1.
Even if the cover 15 springs up significantly so that the claw-shaped portion 19 is inserted into the cover 5a, the cover 15 will not be locked, and will be held in place only by the operator's operation.

[Effects of the invention] Therefore, even if the cover jumps up significantly, the cover will not automatically fall into the held state, and the structure is such that the cover is held in the upwardly pulled position only when the operator needs it. It was obtained.

[Example] Hereinafter, an example of the present invention will be described based on the drawings.

As shown in FIG. 3, a pair of left and right wheels 2 are provided at the lower end of a transmission case 1 located in the center of the aircraft, and an engine 4 is mounted on a frame 3 extending forward from the transmission case 1. Furthermore, a pair of left and right handle rods 5 are extended rearward from the top of the transmission case 1, and a rotary tiller R is connected to the transmission case 1 via a hitch 6 formed on the rear surface of the transmission case 1. to configure the tiller.

Further, in this tiller, the power from the engine 4 is transmitted to the transmission case 1 via the belt transmission mechanism 7, and the power from the transmission case 1 is transmitted to the rotary tiller R via the chain transmission mechanism 8. A transmission system is formed in the rotary tiller R, and at the same time the wheels 2 are used to drive the rotary tiller R, the tiller claws 9 of the rotary tiller R are driven to rotate, thereby carrying out the tilling work.

As shown in FIGS. 1 to 3, the rotary tilling device R includes a transmission case 10 to which the power from the chain transmission mechanism 8 is transmitted, and a transmission case 10 attached to a drive shaft 10a at the lower end of the transmission case 10. Cultivating claws 9..., a frame 11 arranged in the front-rear direction, an upper cover 12, a side cover 13, crushed soil suspended from the rear end of the upper cover 12 and swingable around a shaft 14. It is comprised of covers 15 for preventing scattering, and is further provided with a rotation locking tool S so that the covers 15 are held in the upward swinging position.

In other words, the rotation locking tool S includes the knob 16, the rod 1
7. Compression coil spring 18, consisting of a pair of claw-like portions 19 each formed on a straight line in a direction perpendicular to the axis of rod 17 at the tip of rod 17;
This rotation locking tool S is provided so as to be inserted into a bracket 20 attached to the upper cover 12, and is adapted to draw the cover 15 toward the bracket 20 when the cover 15 is locked.

Further, as shown in FIG. 2, the cover 15 is formed with a through hole 15a through which the claw portion 19 is inserted only when the claw portion 19 is set at a predetermined rotational phase. When holding the rod 17 in place, insert the claw-shaped portion 19 into the through hole 15a with the rod 17 pushed out toward the cover 15, and
After engaging by rotating knob 7 approximately 90 degrees, turn knob 1
6, the cover 15 is held and held between the bracket 20 and the claw-shaped portion 19, as shown in FIG.

[Another Embodiment] In addition to the embodiments described above, the present invention may be applied to, for example, a rotary tiller connected to an agricultural tractor. It is also possible to provide a ball detent or the like to maintain the rotational posture of the rotation operating tool without providing a spring for pulling the shaped portion.

Note that although reference numerals are written in the claims section of the utility model registration for convenience of comparison with the drawings, the present invention is not limited to the structure of the attached drawings by such entry.

[Brief explanation of the drawing]

The drawings show an embodiment of the rotary work machine according to the present invention, in which FIG. 1 is a longitudinal cross-sectional side view of the rotation locking device, FIG. 2 is a rear view of the rotation locking device in the locked state, and FIG. 3 is a rear view of the rotation locking device in the locked state. FIG. 4 is a side view of the entire tiller, FIG. 4 is a vertical sectional side view of a conventional locking structure, and FIG. 5 is a rear view of the conventional locking structure in a locked state. 15...Cover, 15a...Through hole, 19...
Claw-shaped part, S...Rotation locking tool.

Claims (1)

[Scope of utility model registration request] A through hole 1 is provided in a cover 15 for preventing scattering of crushed soil, which is provided in a suspended state and is swingable in the vertical direction.
5a, and is inserted into the through hole 15a of the cover 15 in the upwardly swung position, and
A rotary rotary device comprising a rotation locking tool S having a claw-like portion 19 that locks and holds the swinging posture of the cover 15 by rotation operation around an axis in a direction perpendicular to the surface of the cover 15. work equipment.