JPH0337372Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a reversing device in a connecting case of a tiller, which allows the rotating direction of a rotary claw to be freely switched between forward and reverse directions using a device with a simple structure. It is something.

Conventional technology Generally, in rotary work using a power tiller, the rotary claws are sometimes reversed in order to improve the leveling of the soil. A reversing gear is installed in the connecting case installed between the transmission case and the rotary case, and the reversing gear is rotated by operating the reversing lever (for example, Utility Model Publication No. 135209/1983). It has been known.

Problems that the present invention aims to solve: However, with the reversing lever, the reversing gear installed inside the case is slid by operating the lever, and the meshing of the gears is changed to perform the reversing, so the structure is complicated. This results in problems such as the overall size of the case and the weight of the aircraft.

The present invention was devised to solve these problems in view of the above-mentioned actual situation, and although the rotation of the rotary pawl is switched to reverse rotation within the connecting case, it is particularly difficult to use the reverse rotation lever. There is no need to install gears, etc. to be operated inside the case.
Furthermore, the rotary claw's rotation direction can be freely changed by simply flipping the connecting case back and forth.The structure of the power cultivator is simple, and the entire structure can be compacted, making it easy to handle and operate. The purpose is to provide a reversing device in a case.

Means for Solving the Problems The technical means taken by the present invention to achieve the above object are to provide left and right transmission shafts that are interlocked with each other,
In a connecting case for a power cultivator that is attached to the machine body by fitting the fitting part formed on the transmission shaft to the output shaft of the transmission case and the input shaft of the rotary case, one transmission shaft has the front and rear parts of the case. The other transmission shaft forms a fitting part facing both sides, and the other transmission shaft has separate front and rear transmission bodies, each having a fitting part facing the front and rear sides of the case, which are provided concentrically and in close positions. It is configured so that it can be installed and changed in an inverted state, and the front and rear transmission bodies provided on one transmission shaft and the other transmission shaft are interlocked via a transmission mechanism in which the front and rear transmission bodies rotate in opposite directions. It is characterized by being connected.

Effect of the invention By configuring as described above, the fitting portions of the transmission bodies forming one transmission shaft and the other transmission shaft, which face toward one side of the case, are fitted to the output shaft of the transmission case and the input shaft of the rotary case, respectively. When the connecting case is attached and fixed to the aircraft body, the output shaft of the transmission case and the input shaft of the rotary case are connected by the transmission shaft and the transmission body, which are interlocked via the transmission mechanism, so that the output shaft The input shaft rotates due to the rotational drive.

Then, if the connecting case is removed from the aircraft, reversed front and back, and then reattached to the aircraft, the positions of the separate front and rear transmission bodies will be switched and attached to the aircraft, so the output shaft of the transmission case and the input shaft of the rotary case will be , the transmission body and the transmission shaft are connected to each other so as to rotate in the opposite direction to the direction before the front and rear flipping, and the rotation of the output shaft is reversed and transmitted to the input shaft. Moreover, since the transmission bodies that rotate in opposite directions are arranged concentrically and close to each other, the entire connecting case can be made compact.

Embodiment The structure of the present invention will be described with reference to the embodiment shown in the drawings. 1 is a power tiller, in which an engine 4 is mounted above a machine body 3 equipped with running wheels 2, and a rotary claw 5 is installed at the rear of the machine body. is installed. A connecting case 8 is installed between the mission case 6 and the rotary case 7, and the rotary claw 5 transmits the rotation of the output shaft 9 provided in the mission case 6 to the input shaft 10 of the rotary case 7. It's supposed to rotate.

Reference numeral 11 denotes a connecting case body, in which a pair of front and rear lids 12 and 13 having substantially the same shape are attached to a gasket 14.
It is formed into a hollow shape by being fitted through it. Transmission shafts 15, 1 are provided on both left and right ends of the case body 11.
6 is pivotally supported between the front and rear lid bodies 12, 13 via bearings 17, 17..., and one transmission shaft 1
5 is formed integrally with the sprocket 18, and at both ends of the shaft there are spline fitting parts 19, 20 that can be fitted to either the output shaft 9 or the input shaft 10 and are directed toward both the front and rear sides of the case body 11. It is formed as follows. The other transmission shaft 16 has a transmission body 22 integrally formed with a sprocket 21, and a sprocket 23.
The transmission bodies 22, 24, which are integrally formed and have substantially the same shape, are formed so that they can rotate separately at adjacent positions where they are abutted concentrically from the front and back through a thrust liner, and the transmission bodies 22, 24 In each case, spline fitting portions 25 and 26 which can be fitted to the output shaft 9 and the input shaft 10 are formed toward the front and rear sides of the case body 11, respectively. Reference numeral 27 denotes a mounting knob that passes through the case body 11 from side to side and is attached and fixed to the mounting bracket 28 on the body 3 side.
An intermediate shaft 31 having sprockets 29 and 30 integrally formed thereon is rotatably supported via a collar pipe 32 on the outer periphery of the shaft.

A chain 33 is connected between the sprocket 21 of the transmission body 22 and one sprocket 29 of the intermediate shaft 31.
A chain 34 is wound between the sprocket 23 of the transmission body 24 and the sprocket 18 of the transmission shaft 15.
However, a transmission mechanism is formed on the outer surface thereof so as to mesh with the other sprocket 30 of the intermediate shaft 31, and the transmission shaft 15 is wound so that the transmission bodies 22 and 24 rotate in opposite directions. It is linked and linked. 35 is a tight sprocket supported by the tight shaft 36, and 37 is a mounting nut 38 for the tight shaft 36.
is a mounting nut for the mounting knob 27, and 39 is a dustproof rubber cap.

FIG. 3 shows another embodiment, in which a chain 44 is wound around a sprocket 41 integrally formed on one transmission shaft 40 and a sprocket 43 of an intermediate shaft 42, and the intermediate shaft 42 and transmission body 45 are connected to a gear. 46,
47, and the other transmission body 48 is connected by gears 50, 51 with an idler gear 49 interposed therebetween, so that the concentric transmission bodies 45, 48 rotate in opposite directions at close positions. It's becoming like that. 51a is a spacer interposed between the transmission bodies 45 and 48.

FIG. 4 shows still another embodiment, in which a sprocket 53 of an intermediate shaft 52 is meshed with the inner surface of a chain 56 suspended between one transmission shaft 54 and a transmission body 55, and the intermediate shaft 52 is connected to the other transmission body 57 via gears 58 and 59, so that the concentric transmission bodies 55 and 57 rotate in opposite directions at close positions. The dustproof cover 61 can be attached and fixed at the same time.

In the above configuration, the fitting part 19 of the transmission shaft 15 is now fitted to the output shaft 9 of the transmission case 6, and the fitting part 25 of the transmission body 22 is fitted to the input shaft 10 of the rotary case 7. When the connecting case 8 is attached to the body 3 in this state, when the transmission shaft 15 rotates in the direction of the arrow a in FIG. 2 due to the rotation of the output shaft 9, the chain 34 rotates in the direction of the arrow b and rotates in the same direction as the output shaft 9, but the chain 33 rotates in the direction of arrow c since the sprocket 30 of the intermediate shaft 32 meshes with the outer surface of the chain 34, and the transmission body 22 rotates in the direction of arrow c, and the transmission body 22 rotates in the direction of the other transmission body 24. rotates in the opposite direction, transmits power to the input shaft 10, and rotates the rotary claw 5. Then, if the mounting knob 27 is removed, the case body 11 is removed, the case body 11 is reversed, and the case body 11 is reattached to the fuselage 3.
Since the rotary claw 5 is spline-fitted to the rotary claw 5, the rotation of the rotary claw 5 can be reversed. In addition, if the power is transmitted from the transmission shaft 15 to the transmission bodies 22 and 25, the transmission ratio can be changed simply by changing the left and right positions of the case body 11 and attaching it to the fuselage 3. Dust cover 61 shown in
When the case body 11 is reinstalled using the installation knob 60, the dustproof cover 61 is also reinstalled at the same time, which is convenient because the rubber cap 39 will not be forgotten or lost.

Effects of the Invention In short, the present invention provides left and right transmission shafts that are interlocked with each other, and the fitting portion formed on the transmission shaft is fitted to the output shaft of the transmission case and the input shaft of the rotary case. In the connecting case of the tiller, which is attached to the tiller, one of the power transmission shafts is formed with a fitting part facing both the front and rear sides of the case,
The other transmission shaft has separate front and rear transmission bodies with fitting parts facing the front and rear sides of the case, which are arranged concentrically and in close proximity to each other, so that they can be installed and changed when the case is reversed back and forth. At the same time, since the one transmission body and the front and rear transmission bodies provided on the other transmission shaft are interlocked and connected via a transmission mechanism in which the front and rear transmission bodies rotate in opposite directions, installation of the connecting case is easy. Since the rotation direction of the rotary claw can be freely changed by simply reversing the front and rear, there is no need to install gears or the like that are operated by a reversing lever inside the case. Since the transmission bodies are arranged concentrically and in close proximity, the structure is simple and the whole can be made compact, and handling and operation are easy, significantly improving the efficiency of tilling work. It has extremely useful practical effects.

[Brief explanation of the drawing]

The drawings show an embodiment of a reversing device in a connecting case of a power cultivator according to the present invention, in which FIG. 1 is an overall side view of the power cultivator, FIG. 2A,
B is a cross-sectional view and a vertical cross-sectional view of the connecting case, FIGS. 3A and B are a cross-sectional view and a side view showing another embodiment, and FIG. 4 is a cross-sectional view and a longitudinal cross-sectional view showing another embodiment. It is a front view. In the diagram, 1... fuselage, 6... mission case, 7...
Rotary case, 8... Connecting case, 9
...Output shaft, 10...Input shaft, 15, 16...Transmission shaft,
19, 20, 25, 26...fitting portions.

Claims (1)

[Scope of utility model registration request] A connecting method for a tiller in which left and right transmission shafts are interlocked and connected to each other, and a fitting part formed on the transmission shaft is fitted to an output shaft of a transmission case and an input shaft of a rotary case to be attached to a machine body. In the case, one transmission shaft is formed with a fitting part facing both the front and rear sides of the case, and the other transmission shaft is formed with a separate front and rear transmission body having a fitting part facing the front and rear sides of the case. They are arranged in a core shape and close to each other so that they can be installed and changed when the case is reversed back and forth. A reversing device for a connecting case of a tiller, characterized in that the two are interlocked and connected via a transmission mechanism that rotates in opposite directions.