JPS595281Y2 - Rotary coupling device for rotary work equipment such as cultivators, etc. - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a rotating part coupling device for a rotary working machine such as a tiller.

Conventionally, in tillers, etc., which have a structure in which a rotary work machine is attached to the rear of the machine with running wheels, a hit part is provided at the rear of the machine side, and a shaft cylinder installed on the rotary work machine side is installed in the hit part. There are many devices that are configured so that they can be fitted together and the engagement plate provided on the work machine side can be secured to the locking body provided on the hitch part (for example, Japanese Utility Model Application No. 50-8024), These simply had a connecting and locking function.

The present invention aims to provide a rotating part connecting device for a rotary work machine such as a power tiller, in which the engaging plate is formed into a U-shape and the engaging plate retains the covering protection function of the connecting part. be.

Next, the embodiment shown in the drawings will be described.

Figure 1 shows a side view of the main body of the power tiller.
An engine E is mounted on the front part, and a bundle 3 extends from the top of a mission case 1 to the rear of the fuselage.

B is a rotary working machine, in which a rotary B consisting of tilling claws is mounted on both sides of the lower part of the rotary case 4 in a down-cut manner, and a support extending from a support frame 5 fixed at the upper rear part of the rotary case 4 is installed. A tail wheel 7 at the rear of the rotary B is supported by a rod 6, and the tail wheel 7 is vertically adjustable by an upper adjustment bundle 8.

Further, on both sides of the upper part 4a of the rotary case 4, shaft cylinders 9 and 9' are protruded on the same axis, and an input shaft 10 installed in the upper part 4a is extended outward from one shaft cylinder 9'. Transmission case 1 extended from the transmission case 1 side
1 to transmit power to the input shaft 10, and the upper part 4
In a, transmission is transmitted from the input shaft 10 to a sprocket H2'' via a gear 12, 12', and a rotary B is driven by a chain 13 that extends around the sprocket 12''.

Reference numeral 14 denotes an engagement plate formed by bending a plate into a U-shape, and the end portions of both side plates 14a, 14a of the engagement plate 14 are fitted into both shaft cylinders 9, 9' for free rotation. Snap ring 1
5 to prevent it from coming off, and the upper surface part 14b of the engagement plate 14 straddles above the upper part 4a, and both side plates 14a, 1
Engagement grooves 16, 16 are formed on the distal end side of the upper part 4a and are circular with the centers of the cylindrical shafts 9, 9' open on one side, respectively, and the pin 17 further extending from the upper part 4a and the side plate 14
A tension spring 19 that can be pulled beyond the dead center is connected to the pin 18 extending from a.

In addition, at the rear of the mission case 1, which is the rear of the machine A, there is a hit part 2 consisting of both parallel plates 20a and 20a.
0, and the torso support plates 21a, 21a fixed to the outer surfaces of the upper rear portions of both plates 20a, 20a have support portions 21.21 formed with semicircular notches that open rearward.
The engagement grooves 16 and 16 are provided in the portions of both plates 20a and 20a that are in front of the support portion 21, respectively.
A locking body 22.22 made of a pin that can be engaged with each other is fixed, and the shaft cylinder 9.9 is fitted to the support portion 21.21 from the rear, and the engagement plate 14 is biased by the tension spring 19. The both sides plates 14 of the engagement plate 14 are rotated forward and downward against the
When the engagement groove 16° 16 provided on the distal end side of a and 14 a is engaged with the locking body 2222, the spring 19 moves beyond the dead center and urges the engagement plate 14 forward and downward. The structure is such that the engaged state is reliably maintained, and the rotary working machine A can rotate with the shaft cylinders 9, 9 as the fulcrum O in the same state, and further, the engaged state is maintained. The upper surface portion 14b of the engaging plate 14 located at the upper surface of the engaging plate 14 is configured to cover the upper part of the connecting portion and also function as an integral cover.

A connecting portion C is installed below the fulcrum O, and the connecting portion C is connected to the parallel support metal 23.
3 is protruded, and a parallel plane support 2 is also provided inwardly between them.
33.23a is provided protrudingly, and a support shaft 25 is inserted into the inner side of the cylindrical metal 24.24 fixed between the support metals 23.23. A crescent-shaped engaging portion 20 is formed that is biased to one side with respect to the cross section of the support shaft 2.
5 and the front support pin 23.233.23 Insert the support pin 29 into the H part, and attach the same support metal 232.23 a.
The actuating plate 23 is inserted into the support pin 27 between the support pins 27 and both ends of the spring 25 fitted into the support pin 27 are inserted into the support metal 23.
．． 23 and the lower surface of the actuating plate 28 so that the actuating plate 28 is biased with an elastic turning force clockwise on the left side by the elastic force of the spring 29. Inflection convergence line part 39 that can concatenate with the joint part 26
A notch engaging portion 31 that can be engaged with the pin 30 is formed and opened on the front side of the actuating plate 28.

In addition, in the connecting portion C, a connecting rod 32 having an inflection shape is extended forward from the rotor no case 4 below the fulcrum O, and the pin 30 is fixed to the tip of the connecting rod 32, and one side of the supporting metal 23 is provided. One end of an arm 33 is fixed to the end of the support shaft 25 that protrudes in the direction, and a pin 34 fixed to the tip of the arm 33 and a pin 35 protruding from the support 23 can cross the dead center. The tension spring 35 is connected to the pin 37 fixed to the front side of the hitch part 20 and the pin 34.
Constructed by connecting 8.

A base of a lever 41 that can be rotated around a pin 40 is attached to the side of the support rod 6 at the rear of the rotary work machine B, and the lever 41 is extended rearward so that the operator can step down with his/her foot. The lever 41
The tip of a rod 42 extending from the base 41a of the arm 33 is rotatably connected to the tip of the arm 33 via a pin 43.

A rotary clutch actuating lever 44 is attached to the side of the mission case 1 on the front side of the fulcrum O so as to be able to rotate about a support shaft 45. The mounting bracket 46 of the support frame 5 behind the fulcrum O can be operated by a claw clutch type rotary clutch inside.
and the tip of the lever 44 are connected by a spring wire 47, and a tension spring 50 that can move beyond the dead center is connected between the pin 48 on the tip side of the lever 44 and the pin 49 on the side of the transmission case 1, When the rotary work machine B is in a state where it rotates clockwise on the left side around the fulcrum O, the lever 4 is connected to the spring wire 47.
4 in the counterclockwise direction to disengage the rotary clutch.

Reference numeral 51 designates a main touch operating arm, which is structured to operate the clutch of the input transmission section which is above the transmission of the rotary clutch and above the travel transmission, and is an interlocking arm connected to the main clutch lever 52 provided near the bundle 3. The rod 53 and the operating arm 51 are connected by a rod 54, and the tip of the operating arm 51 and the interlocking rod 53 are connected by a spring wire 55. The spring wire 55 is connected to a pin body 56 provided at one end of the lever 44. The arrangement is such that a stopper 57 inserted through the spring wire 55 and fixed thereto comes into contact with the pin body 56.

In the power tiller having the above structure, as shown in Fig. 1, when the connecting part C is in the connected state and plowing work is performed, the center of gravity G of the machine body is slightly behind the upper part of the axle 2', and the second As shown in the figure, when the rotor 17-B rises above the soil surface 58, the front part of the machine A tilts slightly forward, and the center of gravity G moves slightly forward above the axle 2'.

Therefore, when attaching the rotary work machine B to the machine A, the engagement plate 14 is rotated upward and supported by the tension spring 19 as shown in FIG.
Push the shaft cylinders 9, 9' into the support part 21.21 above the hit part 20 as shown by the arrow A, and fit the engagement plate 14 around the shaft cylinders 9, 9' in the direction of the arrow as shown in FIG. When the tension spring 19 is moved beyond its dead center without being rotated to the position shown in FIG. , and fulcrum O
The rotary work machine R can be attached to the center so that it can rotate, and in the engaged state, the upper surface part 14b of the engagement plate 14 covers the upper part of the connecting part, and the upper surface part 14b functions as an integral cover. It can also be placed in an attached state where it can be removed by performing the reverse operation.

Further, when the actuating plate 28 is rotated in the direction of the arrow C against the spring 29 and the pin 30 is advanced in the two directions of the arrow while being rotated around the fulcrum O, the pin 30 is moved toward the actuating plate 28.
When the connecting portion C is engaged with the notch engaging portion 31, the connecting portion C is brought into a connected state, and the rotary work machine B can be connected as shown in FIG.

In this state, as shown in FIG. 10a, the engaging portion 26 of the support shaft 25 engages with the engaging edge 39 of the actuating plate 28 to perform locking, and the connecting portion C enters the locked state.

Therefore, as shown in Figure 1, plowing work is carried out in the same position as in the past, but when the machine reaches the headland of the field and turns the machine, the operator who controls the machine at the rear of the machine while holding the bundle 3 holds it with his feet. Push lever 4 as shown by arrow H.
1 is pushed down, the rod 42 is not pulled in the direction of the arrow, but the arm 33 resists the tension spring 38 and pulls the tension spring 36 past its dead center in the same direction.
Along with the rotation of the arm 33, the engaging portion of the support shaft 25 rotates in the direction of the arrow G and becomes separated from the engaging edge 39 of the actuating plate 28, so that the connecting portion C can be disconnected.

When the connection part C is disconnected, the rotary R rotates in the direction of the arrow C in a down-cut manner, so the force of hitting the earthwork downward applies force in the floating direction, and it remains on the earth surface 58. Rotary R floats up and the tail wheel 7 is on the ground surface 58
, the position of the fulcrum O is pushed up due to the rotation of the fulcrum O and the disconnection of the connecting part C, and
As shown in FIG. 11, the connecting rod 32 is pushed in the direction of the arrow, and the pin 30 moves in the same direction, coming out of the engaging portion 31 of the actuating plate 28 and moving forward as shown in FIG. Along with this, the actuating plate 28 is rotated about the support pin 27 in the direction of arrow N by the spring 29, and the tip of the actuating plate 28 becomes engaged with the slightly rotated retaining portion 26.

In addition, when the rotary R is in the floating state, the mounting bracket 46 also rotates around the fulcrum O and pulls the spring wire 47 backward to rotate the lever in the direction of the arrow R, resulting in the state shown in FIG. 15. At that point, the rotary clutch disengages, rotary R stops, and the aircraft turns with the main clutch engaged.

In this state, the center of gravity G of the aircraft moves from the rear to the upper side of the axle 2' as shown in Figure 2, so the operator who holds the bundle 3 is forced to perform steering which puts a strain on the bundle grip. be able to.

When the machine has turned and is in the position to start plowing again, when the bundle 3 is pushed down, the position of the fulcrum C is pushed down and the connecting rod 32 is moved in the direction indicated by the reverse arrow, that is, backward. The pin 30 engages with the engaging portion 31 of the actuating plate 28, which is in the position shown in FIG. When the pin 30 moves to the position shown in Figure 10a, the tension springs 36, 3
The engaging portion 26 rotated by 8 engages with the engaging edge 39, and the connecting portion C becomes locked again.

At this time, when the main clutch lever 52 is rotated in the direction of arrow O and operated to disengage the main clutch as shown in FIG. The lever 41 in this state is rotated, the tension spring 50 moves beyond the dead center, and the lever 44 is rotatably supported, and the rotary clutch is operated to engage.

Then, when the main clutch lever 52 is operated again to engage the clutch, the rotor 'J-R rotates as the machine moves forward, allowing plowing work to be performed.

As described above, the present invention provides a rotary tiller, etc., in which the upper part of the rotary case of a rotary work machine is freely rotatably attached to the rear of the machine having running wheels, and the upper part of the rotary case serves as a pivot point. A shaft tube is formed on each side of the shaft tube, and the ends of the same side plates of an engagement plate formed in a U-shape by the upper surfaces of both side plates are fitted in the both shaft tubes so as to rotate freely. A retaining groove was cut out on the tip side of each, and the retaining groove was provided in the hit part when the shaft cylinder was fitted into the semicircular support part provided in the hit part at the rear of the machine side. It is configured so that it can be securely connected to the locking body, and the upper surface part of the engagement plate is configured to cover the connecting part when the locking groove is engaged with the locking body, so that the rotary It can be easily installed by fitting the shaft cylinder of the case into the support part of the hitch part and rotating the engagement plate to engage the locking body. The cylinder can be rotated on the supporting part, and the installation and removal work of the rotary work machine can be performed reliably and easily, and in the engaged and connected state,
There is an effect that the upper surface portion of the engagement plate also performs the function of covering and protecting the continuous portion.

[Brief explanation of drawings]

The drawings show an embodiment, and Fig. 1 is a side view of the power tiller body, Fig. 2 is an explanatory diagram of its operation, Fig. 3 is an enlarged view of a part of Fig. 1, and Fig. 4 is an enlarged view of Fig. 3. Some enlarged views, Figure 5 is 4th
6 and 7 are explanatory diagrams of the operation of FIG. 4, FIG. 8 is an enlarged view of a portion of FIG. 3, FIG. 9 is a sectional view of the connecting part, and FIG. 10 a is a side sectional view of a part of the connecting part, FIG. 10 shows a part thereof, FIGS. 11 and 12 are explanatory diagrams of the operation of FIG. 10 a, and FIG. 13 is a part of FIG. 3. 14 is an enlarged view of a part of FIG. 13, and FIGS. 15 and 16 are explanatory views of the operation of FIG. 13. 2... Running wheels, A... This machine, B...
...Rotary work machine, O...Fulcrum, 4...
...Rotary case, 9゜9'...Shaft cylinder, 20...Hit part, 21.21...
Support part, 14... Engagement plate, 22.22...
...Latching body.

Claims (1)

[Scope of utility model registration request] In a power tiller, etc., in which the upper part of the rotary case 4 of the rotary work machine B is rotatably attached to the rear of the machine having running wheels, on both sides of the part of the upper part of the rotary case 4 that serves as a rotational fulcrum. Shaft cylinders 9 and 9' are respectively formed, and both the shaft cylinders 9 and 9' have ends of the same side plates 14a and 14a of an engagement plate 14 formed in a U-shape by side plates 14a and 14a and an upper surface part 14b. The two side plates 14a and 14a have engagement grooves 16 and 1 at their distal ends, respectively.
6 and attach the shaft cylinders 9 and 9' to the hitch part 2 at the rear of the machine.
The engaging grooves 16, 16 are configured to be able to be engaged and connected to the locking bodies 22, 22 provided on the hit portion 20 when the semicircular support portion 21° 21 provided on the hit portion 20 is fitted. , with the retaining grooves 16 and 16 engaged with the locking bodies 22, 22,
A rotating part connecting device for a rotary working machine such as a tiller, in which the upper surface part 14b of the engagement plate 14 is configured to cover the connecting part.