JPH051217Y2 - - Google Patents

Description

[Detailed description of the invention] (a) Industrial application field The present invention relates to a single tilling soil device mounting device in a rotary tillage device.

(b) Prior Art Conventionally, a single tiller mounting device for a rotary tiller, in which a bracket of a single tiller is fixed to a bracket of a tool bar of a rotary tiller, has already been known.

(c) Problems to be solved by the invention In the above-mentioned known rotary cultivator, the single tiller mounting device firmly fixes the bracket of the single tiller to the bracket of the tool bar, so there is no overload on the single tiller. When this happened, there were problems such as the struts bending, the brackets breaking, and the toolbars bending.

(d) Means for solving the problem The present invention overlaps the bracket attached to the rotary tool bar and the bracket of the single-cultivator in the vertical plane parallel to the direction of travel, and presses the brackets with a spring. The above spring is supported by a cam with a lever to adjust the degree of compression of the spring, so that the elastic force against the lock is increased during work, and the spring is connected with a removable lock. The single-layer earther is reliably supported in a predetermined working posture against the load of The above-mentioned problem has been solved by weakening the elastic force of the spring when returning the machine to its normal working position so that the returning and setting work can be easily carried out.

(E) Function When carrying out single-tiling work, set the single-tilt pot in the normal working position, rotate the lever, compress the spring with the cam, and press the locking tool strongly to connect both brackets. Make it stronger.

When work is carried out in this state and an overload is applied to the single earther, the single earther overcomes the locking force of the locking tool pressed by the spring and rotates to retreat together with its bracket.

When returning the single soil potter to its normal working position, the lever is used to rotate the cam to weaken the pressing force of the spring, which weakens the locking force of the locking tool and makes it easier to return the single soil potter to its normal working position. You can return to the working posture, and also convert between the non-working posture and the working posture,
A firm setting operation can be performed quickly and easily by rotating the cam.

(F) Example An example of the present invention will be explained with reference to the drawings.
Reference numeral 1 denotes a rotary tiller connected to the rear of a tractor 2 by lower links 3, 3 and a top link 4, which is raised and lowered via lift arms 4a, 4a and loft rods 4b, 4b, and is driven by a PTO shaft of the tractor via a yoke. The rotary tiller 5 is covered with a top cover 6, a side cover 7, and a rear cover 8.

Reference numeral 10 is a ridge erector which is attached to the middle part of the tool bar 12 and can be set in a lowered working position and an elevated non-working position; 13 is a single-cultivator, and its support 15 is a hexagonal pipe. 16 and fixed.

A bracket 17 having a horizontal mounting hole 17a is welded to the rear surface of the hexagonal pipe 16, and a square pipe portion 20a is fitted to the side end of the tool bar 12 and screwed with a bolt 18. The brackets 17 and 20 overlap in the vertical plane parallel to the traveling direction, and a mounting hole 21 formed in the bracket 20 and a two-step boss 22 are formed in the mounting hole 17a. Insert the fulcrum bolt 23, nut 24, and washer 2.
5 and 25, it is rotatably fixed.

Additionally, a bracket 20 integrated with the toolbar 12 is provided.
The lower part of the fulcrum bolt 23 is fixed by screwing one end of the cylinder 26 to the lower part of the fulcrum bolt 23.
Both ends of the spring 27 installed in the cylinder are received by right and left movable seats 28 and 29, and the protrusion 29a of one of the seats 29 is loosely fitted into the hole 30 of the cylinder 26, and the outer end surface of the other seat 28 is inserted. is the eccentric position of pin 31
The lever 33 protruding from the cam 32 is received by a stopper 34 in the lowered position when the catch seat 28 is pushed in.

Furthermore, the bracket 17 that is integrated with the single-layered earther 13 has a conical shape that faces the hole 30 of the cylinder 26 when the single-layered earther 13 is lowered to the working position and raised to the non-working position. Receiving hole 3
5, 36 are provided, and those receiving holes 35, 36 are provided.
The ball 37 in the hole 30 is press-fitted into one of the holes 30 by the spring 27 and positioned.

Then, when the ridge erector 10 is raised and set as shown in FIG.
When the catch 28 is pushed in, the spring 27 is compressed, so the protrusion 29 of the other catch 29
A strongly pushes the ball 37 into the receiving hole 35 to firmly connect the two overlapping brackets 17 and 20, and maintains a constant working posture even when a normal load is applied to the single-cultivator 13.

However, when an overload is applied to the single-layer earther 13, the single-layer earther 13 rotates backward together with the bracket 17, and the ball 37 is pushed out from the receiving hole 35, as shown in FIG. The condition is reached, and the single pottery pot 1
3 and its supporting device are not damaged, and when returning the half-cultivator 13 to its original working position, press the lever 3.
3 is rotated upward, the spring 27 is extended and becomes L, and it can be easily rotated back, and the single soil pot 13 is returned to the predetermined position and the ball 37 is inserted into the receiving hole 3.
5, when the lever 33 is rotated downward, the cam 32 compresses the spring 27 to its length, resulting in a firm set state.

Furthermore, when the single tiller 13 is evacuated after the single tiller work is completed, when the lever 33 is rotated upward as shown in FIG. 28 is pushed out to some extent by the spring 27, and as a result, the pressing force of the spring 27 is reduced, making it possible to easily raise and rotate the one-piece soil pot 13, and in the raised state, the ball 37 lowers into the other receiving hole 36. When the lever 33 is rotated downward, a firm locking state can be obtained.

(g) Effect of the invention Since the invention is constructed as described above, the lever 3
3, by rotating the cam 32, the pressing force of the spring 27 is changed from strong to weak, making it possible to easily and quickly convert the single-layer earthen pot 13 between a working position and an inverted work position, and also to change the single-layer earther 13 into a working position and an inverted work position. It can be easily and firmly set in any position, and when overloaded, the spring 27 is compressed and the connection by the locking tool is released, allowing the single-cultivator 13
It is possible to prevent the tool itself, its support, the tool bar 12, etc. from being damaged.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention,
Figure 1 is a vertical cross-sectional view of the single-cultivator mounting device with the locking force weakened, Figure 2 is a vertical cross-sectional view of the same with the locking force strengthened, and Figure 3 is a vertical cross-section of the same as above when overloaded. figure,
Fig. 4 is a side view of the working device, Fig. 5 is a plan view of the single-cultivator mounting device, and Fig. 6 shows the ridge erector set with the ridge erected upside down and the single-cultivator set in the working position. It is a top view attached to the rotary tiller. 1... Rotary tillage device, 12... Tool bar, 13... Single tiller, 17, 20... Bracket, 26... Cylinder, 27... Spring, 2
8, 29... catch, 32... cam, 33... lever.

Claims (1)

[Scope of utility model registration request] The bracket 17 attached to the tool bar 12 of the rotary and the bracket 20 of the single soil cultivator 13 are overlapped in the vertical plane parallel to the direction of movement, and the brackets 17 and 20 are connected to each other by a removable engagement that is pressed by a spring 27. Connect with a stopper and attach the spring 2 above.
7 is supported by a cam 32 having a lever 33 to adjust the degree of compression of a spring 27.