JPS6028833Y2 - Clutch device for mobile agricultural machinery, etc. - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a novel latch device that can be extremely conveniently used in mobile agricultural machines such as binders, combines, tractors, tillers, and rice transplanters.

In the case of a binder or combine harvester, there are cases in which the harvesting part such as the cutting blade is driven while the machine is moving, and cases in which the drive of the harvesting part is stopped on the road etc. and only the machine moves, and there are cases in which the machine's movement is also stopped. For tillers and rice transplanters, there are three similar cases in terms of the relationship between the machine running and the drive of the tilling section or rice planting section, and for tractors, the machine stops running and only the work equipment is driven. In some cases, stationary work is carried out by performing stationary work, but in such mobile agricultural machinery, the driving force from the same driving source is selectively cut off, or transmitted to only one of the two driven bodies, Needless to say, it would be extremely beneficial to have a clutch device that transmits power to both driven bodies.

This invention is a clutch device for such a purpose,
Its structure is simple and can be compactly assembled.

The objective is to provide a new latch device for mobile agricultural machinery and the like.

Regarding the illustrated embodiment, the structure of the clutch device in a mobile agricultural machine or the like according to the present invention will be explained. In the first embodiment shown in FIGS. 1-4, 1 is a rotatably supported transmission shaft, This transmission shaft 1 has a large diameter portion 1a in the middle thereof.

Then, connect the two hollow power transmission shafts 2 and 3 on the power transmission shaft 1 with the large diameter portion 1a between each end surface of the large diameter portion 1a and the power transmission shafts 2 and 3.
Upper retaining rings 4 and 5 restrict the position of the transmission shaft 1 in the axial direction and are fitted loosely, and in the case shown, the hollow transmission shaft 2
is used as a driving shaft, and an input gear 6 is fixed on the shaft 2, and the hollow transmission shaft 3 and the transmission shaft 1 are respectively used as driven shafts, and output gears 7 and 8 are fixed on the shafts 3 and 1, respectively. .

A shift ring 9 is provided on the hollow power transmission shaft 2 by fitting splines 2a and 9a so that it can slide freely but cannot rotate relative to the other. A plurality of claw-like engaging parts 10 on the inner peripheral side and claw-like engaging parts 11 on the outer peripheral side are arranged intermittently along the circumferential direction in the plane of
(in the case shown, two pieces each) are formed, respectively, and the first
As shown in FIG. 3, the meshing portion 11 on the outer circumferential side projects more toward the large diameter portion 1a of the transmission shaft than the meshing portion 10 on the inner circumferential side.

Further, the hollow transmission shaft 3, which has a large-diameter flange 3a integrally formed at the end on the transmission shaft large-diameter portion 1a side, has a radial shape so that the meshing portion 11 on the outer peripheral side of the shift ring body 9 can be engaged with the hollow transmission shaft 3. A plurality of claw-like engaging parts 12 (two in the illustrated case) are formed intermittently along the circumferential direction on the surface of the flange 3a, and furthermore, Large diameter portion 1a of shaft 1
A claw-shaped engaging portion 13 is provided protruding from the circumferential surface of the shift ring body 9 and is positioned in the radial direction so as to be able to engage the engaging portion 10 on the inner circumferential side of the shift ring 9. A plurality of pieces (two pieces in the illustrated case) are formed intermittently along the line.

The shift ring body 9 has an annular groove 1 formed on its circumferential surface.
The hollow power transmission shaft 2 is slid along the axial direction by a shifter (not shown) whose tip end is fitted into the shift ring 9 and engaged with the shift ring 9.
As shown in Fig. 1, the spacing α between the engaging parts 11, 12 on the outer peripheral side is larger than that on the inner peripheral side when viewed in the axial direction of the clutch device. Engagement part 10.
When the shift ring body 9 is slid in the direction of the large diameter portion 1a of the transmission shaft, the meshing portions 11 and 12 on the outer circumferential side first move. Then, when the shift ring 9 is further slid in the same direction, the meshing portions 10 and 13 on the inner peripheral side are engaged.

As described above, in the clutch device shown in FIGS. 1-4, the shift ring 9 on the hollow power transmission shaft 2, which is rotated via the input gear 6, is moved from the position shown in FIG. 1a direction, and as shown in FIG. 4a, the meshing portion 11 on the outer peripheral side of the shift ring 9 is meshed with the meshing portion 12 of the hollow power transmission shaft 3, and both the hollow power transmission shafts 2, 3 are connected in the rotational direction to obtain rotation of the hollow transmission shaft 3 and, therefore, the output gear 7 thereon. From this state, the shift ring 9 is further slid in the direction of the transmission shaft large diameter portion 1a. and the shift ring 9 as shown in FIG.
The meshing portion 13 of the transmission shaft large diameter portion 1a of the meshing portion 10 on the inner peripheral side of
When the hollow transmission shaft 2 and the transmission shaft 1 are meshed with each other, the hollow transmission shaft 2 and the transmission shaft 1 are coupled in the rotational direction, and the transmission shaft 1 and therefore the output gear 8 thereon can be rotated.

In other words, the clutch device shown in FIGS. 1-4 is in a state (FIG. 1) in which power transmission between the hollow power transmission shaft 2, which is the driving shaft, the hollow power transmission shaft 3, which is the driven shaft, and the power transmission shaft 1 is both cut off; By connecting the driving shaft 2 to only one driven shaft 3, one driven shaft 3 is connected.
A state in which power is transmitted only in one direction (Fig. 4 a), and a state in which the driving shaft 2 is coupled to both wave shafts 3 and 1 and power is transmitted in one direction to both wave shafts 3 and 1 (Fig. 4 b). It can be selectively switched.

Next, another embodiment shown in FIGS. 5-7 will be described. In this embodiment, an internal gear-shaped engagement part 11 is formed on the shift ring body 9 in place of the claw-shaped engagement part 11 described above. At the same time, a gear-shaped engagement part 12 is formed at the end of the hollow transmission shaft 3 in place of the above-mentioned claw-shaped engagement part 12, and the engagement between the two gear-shaped engagement parts 11 and 12 due to the displacement of the shift ring body 9 causes both hollow transmission shafts to be closed. It is configured to connect the transmission shafts 2.3.

Further, the engaging portion 10 on the inner peripheral side of the shift ring 9 is formed into a pair of claw-like shapes, and the engaging portion 13 formed on the large diameter portion 1a of the transmission shaft is circular so that the engaging portion 10 can be engaged with the engaging portion 10. It is formed into a pair of claw-like parts with a large width in the circumferential direction.

The distance α between the meshing portions 11.12 on the outer peripheral side and the distance β between the meshing portions 10.13 on the inner peripheral side are opposite to those in the previous embodiment.
As shown in FIG. 5, the latter interval β is set to be smaller than the former interval α (α>β).

The structure of other parts of the embodiment shown in FIGS. 5-7 is as follows.
The structure is substantially the same as that of the corresponding part in the embodiment shown in FIG.

In the embodiment shown in FIGS. 5-7, the shift ring 9 is first moved by the sliding displacement in the direction of the large diameter portion 1a of the transmission shaft.
The meshing portion 10 of the transmission shaft is meshed with the meshing portion 13 of the large diameter portion 1a of the transmission shaft (FIG. 7a), and then the meshing between the meshing portions 11 and 12 (FIG. 7b) is obtained.

Therefore, the clutch device shown in FIGS. 5-7 has two states: one in which the power transmission between the driving shaft 2 and both wave shafts 1.3 is cut off, and the other in which the driving shaft 2 is coupled to only one driven shaft 1. Selectively switch between a state in which power is transmitted only in one direction of one driven shaft and a state in which driving shaft 2 is coupled to both wave shafts 1 and 3 and power is transmitted in the direction of both wave shafts 1 and 3. It's something you get.

In the embodiment shown in FIGS. 1-4, the hollow power transmission shaft 3 may be used as the driving shaft and the hollow power transmission shaft 2 may be used as the driven shaft.
There is no problem.

That is, at this time, the hollow power transmission shaft 3 which is the driving shaft and the hollow power transmission shaft 2 which is the driven shaft are first connected, and then the power transmission shaft 1 which is the other driven shaft is also connected to the driving shaft via the shift ring 9. This is because it is coupled to a certain hollow power transmission shaft 2.

Similarly, in the embodiment shown in FIGS. 5-7, the transmission shaft 1 may be configured as a driving shaft, and the hollow transmission shaft 2 may be configured as a driven shaft. In this case, the driving shaft 1 is first It is coupled to the driven shaft 2 and then to another driven shaft 3 via the shift ring 9.

As is clear from the above description, the clutch device of this invention has two hollow transmission shafts 2 and 3 loosely fitted onto the transmission shaft 1 with the large diameter portion 1a formed on the transmission shaft 1 in between, A shift ring 9 is provided on one of the hollow transmission shafts 2 so as to be slidable but not relatively rotatable, and a pair of inner and outer circumferences are engaged with the shift ring 9 on the surface on the large diameter portion 1a side. 10.11, and the first meshing part 12 is formed on the other hollow transmission shaft 3 in the part located on the large diameter part 1a side, and the meshing part 11 on the outer circumferential side on the shift ring body 9 is formed on the other hollow transmission shaft 3. The position in the radial direction of the clutch device is set and formed so that the clutch device can be engaged with the second engagement portion 13 on the large diameter portion 1a, and the engagement portion 10 on the inner circumferential side on the shift ring 9. The positions in the radial direction of the clutch device are set and shaped so that they can be engaged with each other, and when viewed in the axial direction of the clutch device, the engagement portion 11 on the outer peripheral side of the shift ring 9 and the first engagement portion 12 are formed. The interval between α
and the interval β between the inner circumferential meshing portion 10 on the shift ring 9 and the second meshing portion 13 are different from each other, and the distance β is different from each other in the radial direction of the clutch device. When the two engaging parts 11 and 12 arranged on the outer circumferential side are engaged with each other, both the hollow transmission shafts 2 and 3 are engaged with each other via the shift ring 9, and both the engaging parts 10 and 13 arranged on the inner circumferential side are engaged with each other. Then, the hollow transmission shaft 2 and the transmission shaft 1 are interlocked and connected via the shift ring 9, and the shift ring 9 is shifted on the hollow transmission shaft 2 in the direction of the large diameter portion 1a of the transmission shaft. At this time, depending on the amount of operation, a state in which either one of the outer circumferential meshing portions 11, 12 and the inner circumferential meshing portions 10, 13 are engaged, or a state in which both are engaged is selectively determined. This is what you can get.

Therefore, in the clutch device of this invention, one of the transmission shafts 1 and both hollow transmission shafts 2 and 3 is selected as the driving shaft, and the other two transmission shafts are selected as the driven shafts. 2. Selectively switch between a state where power transmission to the driven side is cut off, a state where power is transmitted only from the driving side to the driven side in one direction, and a state where power is transmitted from the driving side to the driven side in both directions. Therefore, it is extremely useful and convenient to use in the mobile agricultural machinery etc. mentioned at the beginning, and moreover, two hollow power transmission shafts are provided on one power transmission shaft with the large diameter part of the shaft sandwiched between them. The structure can be made compact due to the structure in which the interlocking parts of the inner and outer circumferences that perform the action are assembled at the large diameter part position and the structure in which switching between the three states described above is performed by a single shift ring. In addition, due to the above points and the fact that there is only one system of operation, it has a simple structure and has the remarkable advantage that it can be easily operated by only one system of operation.

[Brief explanation of drawings]

Figure 1 is a vertical sectional view of one embodiment of this invention, and Figure 2 is a vertical cross-sectional view of one embodiment of this invention.
3 is an exploded perspective view of essential parts of the above embodiment, and FIGS. 4a and 4b are longitudinal sectional views illustrating the operation of the above embodiment. Figure 5 is a longitudinal sectional view of another embodiment of the invention, Figure 6 is a partially cutaway exploded perspective view of the main part of the other embodiment, and Figures 7a and 7b are respectively the other embodiments described above. FIG. 1...Transmission shaft, 1a...Large diameter part, 2...
...Hollow power transmission shaft, 3...Hollow power transmission shaft, 9
......Shift ring body, 10...Matching part, 1
1...Matching part, 12...Matching part, 13
・・・・・・Matching part.

Claims (1)

[Scope of utility model registration request] Two hollow transmission shafts 2 and 3 are loosely fitted onto the transmission shaft 1 with the large diameter portion 1a formed on the transmission shaft 1 in between, and the shift ring 9 is slid onto one of the hollow transmission shafts 2. The shift ring body 9 is provided with a pair of engaging portions 10 and 11 on the inner and outer peripheries on the surface facing the large diameter portion 1a. The first engaging portion 12 in the portion located on the diameter portion 1a side is connected to the shift ring body 9 described above.
The position in the radial direction of the clutch device is set so as to be able to mesh with the upper outer peripheral side engaging portion 11, and the second engaging portion 13 is provided on the large diameter portion 1a, and the shift ring body 9 is provided with a second engaging portion 13 on the large diameter portion 1a.
The position in the radial direction of the clutch device is set and shaped so that the engagement portion 10 on the inner circumference side above can be engaged with the engagement portion 11 on the outer circumference side on the shift ring body 9 described above when viewed in the radial direction of the clutch device. and the first meshing portion 12 and the distance β between the inner peripheral meshing portion 10 on the shift ring 9 and the second meshing portion 13 are made different from each other. A clutch device for mobile agricultural machinery, etc.