JPS6041043Y2 - Power take-off device in rotary equipment - Google Patents

Description

[Detailed Description of the Invention] An object of the present invention is to contribute to the multiplication of work in which rotary work and other work are performed simultaneously on a power take-off device in a rotary device.

When a rotary device is attached to a tractor and rotary work is performed, subsequent work such as pest control work, fertilization work, seeding work, etc., is often performed at the same time as the rotary work, which is the so-called complex work. There is a tendency.

However, the power that drives working machines such as pest control machines, fertilizers, and seeding machines is generally extracted from the tractor side, completely separate from the rotary device, and this is a major bottleneck in attempting to complicate work. It had become.

In other words, since the tractor's PTO system is connected to the rotary device, unless the tractor is equipped with multiple PTO systems, high-speed drive type work equipment (e.g., pest control machine, vacuum adsorption seeding machine, etc.) cannot be used in combination. Therefore, tractors equipped with only a rear PTO shaft use a method of extracting power from the rear wheels, etc., but the work equipment that can be used in this case is limited to low-speed drive types, promoting the multiplication of work. The big problem was where to get the power from.

The present invention has been developed to solve these conventional problems, and its feature is that the rear opening 29 formed in the gear case 6 having the input shaft 19 projecting forward is connected to the rear opening 29. In the rotary device covered with a cover 30, a transmission shaft 20 that interlocks with the rotary tiller 4 is provided in the gear case 6 in parallel to the input shaft 19.
9 and a transmission shaft 20 at their rear ends.
5.26, the rear cover 30 has the same axis behind the input shaft 19, and the input shaft 19
A power take-off shaft 37 is provided in a rearwardly protruding manner and interlocks with a portion of the gear other than the teeth on the outer periphery of the gear, and the power take-off shaft 37 and the rear cover 30 are made detachable from the gear case 6. .

Hereinafter, the illustrated embodiment will be described in detail based on the drawings of FIGS. 1 to 3. FIG. 1 illustrates a case where a rotary device 1 is equipped with a pest control device 2.

The rotary device 1 includes a rotary machine frame 3, a rotary tiller 4, a rotary cover 5, and the like.

The rotary machine frame 3 has a gear case 6 located at the upper center,
This rotary machine frame 3 includes a pair of left and right support arms 7 attached to both sides of the gear case 6, a transmission case 8 and a side frame 9 provided below from the outer end of each support arm 7. It is attached to the rear of the tractor via a three-point linkage mechanism so that it can be raised and lowered.

The rotary tiller 4 has a pawl shaft 10 supported between the transmission case 8 and the lower end of the side frame 9, and a large number of tilling pawls 11 planted on the pawl shaft 10.

The pest control device 2 includes a chemical tank 13 mounted on the support arm 7 via a mounting plate 12, a liquid feed pump 14 mounted on the mounting plate 12, a spray pipe 15 horizontally suspended at the rear upper position of the rotary cover 5, etc. The spray pipe 15 is supported by the rotary machine frame 3 via a mounting frame 16.

The liquid feed pump 14 is driven by a power output shaft 37 provided in the gear case 6 via a winding transmission mechanism 18, as will be described later.

In the gear case 6, as shown in FIG. 2, an input shaft 19 and a transmission shaft 20 in the front-rear direction are arranged side by side on the left and right sides.

The input shaft 19 is rotatably mounted on the gear case 6 via bearings 21 and 22, and projects forward from the gear case 6, and the projecting end receives power from the PTO shaft of the tractor. A universal joint shaft that transmits the information is detachably connected.

The transmission shaft 20 is rotatably mounted on the gear case 6 via bearings 23 and 24.

The input shaft 19 and the transmission shaft 20 are interlocked with each other via gears 25 and 26 on the rear side of bearings 22 and 24.

That is, the input shaft 19 and the transmission shaft 20 have spline portions 27.28 at the protruding ends that protrude rearward from the bearings 22, 24, and the gear case 6 is attached to each of the spline portions 27.28.
Each gear 25.26 is opened from the rear opening 29 side formed in the
are removably spline-fitted, and each gear 2
5.26 is always in occlusion.

A bevel gear 33 is integrally rotatably fitted onto the front end side of the transmission shaft 20, and this bevel gear 33 meshes with a bevel gear 35 inside the transmission shaft 34, which is rotatably fitted into the support arm 7 on one side. .

The transmission shaft 34 is connected to the pawl shaft 1 via a transmission mechanism inside the transmission case 8.
It is linked to 0.

The rear opening 29 is removably covered by a rear cover 30 with bolts 36, and a power take-off shaft 37 having the same axis as the input shaft 19 is attached to the rear cover 30 with a bearing 40.
In order to be able to rotate freely, a spline portion 39 of the power take-off shaft 37 is made to protrude rearward, and a pulley 37 of the winding transmission mechanism 18 is detachably attached to the spline portion 39.

The front end of the power take-off shaft 37 is formed to have a larger diameter from the rear side to form a large diameter portion 38, and a plurality of connecting pin portions 41 protruding forward are provided at equal intervals in the circumferential direction on the front surface of the large diameter portion 38. These connecting pin portions 41 are removably inserted from the rear side into a connecting hole 42 formed to correspond to the gear 25 spline-fitted to the rear end of the input shaft 19, thereby connecting the input shaft 19 and the power output shaft 37. They are interlocked and connected so that they can be connected and separated.

Note that 49 is a protective cover for the power output shaft 37, which can be detachably attached to the rear cover 30 with bolts or the like.

Next, the effect will be explained.

When a universal joint shaft is connected to the input shaft 19 and the input shaft 19 is driven, the power is transmitted to the gears 25, 26, and the transmission shaft 20.
, bevel gear 33, bevel gear 35 to transmission shaft 34
It is transmitted to the claw shaft 10 through the rotation of the claw shaft 10, and the field can be tilled by the tilling claws 11 as the claw shaft 10 rotates.

On the other hand, the power output shaft 37 is connected to the input shaft 19 via the gear 2.
Since the power is transmitted to the rotary device 1, a part of the power can be taken out from the power extraction shaft 37, and this power drives the liquid feed pump 14 of the pest control machine 2. able to perform work.

In other words, the rotary work by the rotary cleaner 1 and the pest control machine 2
This allows combined work with pest control work.

In this case, since the power take-off shaft 37 is made to protrude rearward from the rear of the gear case 6 located at the upper central position of the rotary machine frame 3, there is no risk of it getting entangled with grass, getting mud, or coming into contact with the human body. It is extremely small, power can be extracted safely, and the minimum necessary safety measures are sufficient in terms of location.

In addition, since the large diameter portion 38 of the power take-off shaft 37 is directly connected to the gear 25 spline-fitted to the rear end of the input shaft 19, the rotation direction and rotation speed of both the input shaft 19 and the power take-off shaft 37 are the same. In addition, there is no need for a special transmission mechanism between the two, and the structure of the transmission mechanism is extremely simple compared to one in which the power take-off shaft is disposed on the side of the gear case.

Furthermore, since the power take-off shaft 37 is provided in the rear cover 30 conventionally provided in the gear case 6, there is no need to newly prepare a special member for providing the power take-off shaft 37. The structure is also simple.

Note that the rotary tiller 44 is stopped and the power take-off shaft 37
When extracting power only from the vehicle, the rear cover 30 may be removed and the gear 26 may be extracted from the transmission shaft 20.

In addition, when changing the low clutch device 1 to a general type that does not have a power take-off shaft, remove the rear cover 30 equipped with the power take-off shaft 37 from the gear case 6, and replace it with the one shown in FIG. The above changes can be made simply by attaching the general type rear force bar 43, and the reverse changes can also be made by following the reverse procedure.

In addition, on the inner surface of the rear cover 43, there is a support shaft 44.26 that is spline-fitted to the input shaft 19 and the transmission shaft 20, and a replacement gear 31.32 having a different number of teeth, which is fixed to the rear cover 43. The gears 25, 26 and the replacement gears 31.
32, the reduction ratio between the input shaft 19 and the transmission shaft 20 can be changed.

4 and 5 show a second embodiment of the present invention,
The large diameter portion 38 of the power take-off shaft 37, the exchange gear 31, and the gear 25 are connected and separated as one body by fixing 47 such as bolts inserted through shims 46 at equal intervals in the circumferential direction. is removably spline-fitted to the spline portion 27 of the input shaft 19.

A support shaft 45 fixed to the inner surface of the rear cover 30 is provided with an exchange gear 32 through a spline cylinder shaft 48 so as to be freely rotatable and detachable, so that both exchange gears 31 and 32 are always engaged. There is.

According to the second embodiment, even when the gear case 6 is equipped with the rear cover 30 equipped with the power take-off shaft 37, the gear 25.2
It is possible to change the reduction ratio of the input shaft 19 and the transmission shaft 20 by changing the combination of the input shaft 6 and the exchange gears 31 and 32.

In addition, in the second embodiment, when changing the rotary device 1 to a general type, the power take-off shaft 37 is changed as in the first embodiment.
At the same time, remove the rear cover 30 with the
Remove the replacement gear 32 from the rear cover 30.
Remove.

Then, the gear 25 is connected to the spline portion 2 of the input shaft 19.
7 with spline fitting, and both exchange gears 31.3
2 is attached to the general type rear force bar 43 shown in FIG. 5, and this rear cover 43 is attached to the gear case 6.

As detailed above, in this invention, since the gear case is equipped with a power take-off shaft that interlocks with the input shaft, it is possible to drive other work equipment using the row-crying power, and it is possible to perform both row-crying work and other work. It can greatly contribute to the combination of

Further, since the power take-off shaft is arranged so as to have the same axis as the input shaft, a transmission mechanism for interlocking the two can be constructed extremely simply, for example, as in the embodiment.

Furthermore, since the power take-off shaft is provided in the conventional rear cover that covers the rear opening of the gear case, there is no need to newly prepare a special member for providing the power take-off shaft.

Furthermore, since the rear cover and the power take-off shaft are removable from the gear case, if you prepare a general type rear force bar that does not have a power take-off shaft, you can easily extract the power from a rotary device equipped with a power take-off shaft. It is easy to change to a general type without a shaft and vice versa.

Further, a transmission shaft interlocked with the rotary tiller is provided in the gear case in parallel with the input shaft, and the input shaft and the transmission shaft are connected to the waist input shaft by a gear provided at their rear ends. Since the part of the gear other than the teeth on the outer periphery is interlocked and connected to the power take-off shaft, two systems of power transmission, one to the rotary tiller and the other to the power take-off shaft, can be transmitted to the input shaft. By using the equipped gear,
This is extremely easy to do, and by appropriately setting the tooth ratio of the gears provided at the rear end of the input shaft and power output shaft, the ratio of the rotation speed of the input shaft and rotary tiller can be easily and freely set. can.

[Brief explanation of drawings]

1 to 3 show a first embodiment of the present invention. FIG. 1 is an overall rear view, FIG. 2 is a cross-sectional plan view of the gear case portion, and FIG.
The figure is a sectional view of the main part of the rear cover in Fig. 2 replaced with a general type one, Fig. 4 is a sectional view of the main part showing the second embodiment of the present invention, and Fig. 5 is a sectional view of the main part of the rear cover shown in Fig. 4. It is a sectional view of the main part replaced with a general one. 1...Rotary device, 2...Best control machine,
6... Gear case, 19... Input shaft,
29... Rear opening, 30... Rear cover, 37... Power take-off shaft.

Claims (1)

[Scope of utility model registration request] In a rotary drive device in which a rear opening 29 formed in a gear case 6 having a forwardly protruding input shaft 19 is covered with a rear cover 30, a transmission shaft 20 interlocking with a rotary tiller section 4 is provided in the gear case 6. The rear cover 30 is provided parallel to the input shaft 19, and the input shaft 19 and the transmission shaft 20 are interlocked and connected by gears 25 and 26 provided at their rear ends.
A power take-off shaft 37 is provided in a rearwardly protruding manner, having the same axis behind the input shaft 19 and interlocking with a portion of the gear 25 provided on the input shaft 19 except for the outer peripheral teeth. A power extraction device for a rotary device, characterized in that a power extraction shaft 37 and a rear cover 30 are detachably attached to a gear case 6.