JPH06923Y2 - Combine harvesting power extraction mechanism - Google Patents

Description

[Detailed Description of the Invention] (a) Field of Industrial Application The present invention relates to a harvesting power take-out mechanism for taking out a harvesting rotation synchronized with a traveling speed in a combine.

(B) Conventional technology Conventionally, the rotation of the reaping power take-out mechanism is directly taken out of the engine rotation when the traveling speed is low, and is synchronized with the traveling speed obtained by the continuously variable transmission when the traveling speed becomes high. The technology to extract power is
It is known as follows.

(C) Problems to be solved by the invention According to the conventional structure, the cutting PTO is attached to the drive shaft end of the auxiliary transmission.
Shafts are installed side by side and connected by a one-way clutch on the traveling power transmission side, and a gear is fixedly installed on the input shaft of the continuously variable transmission,
The mowing PTO shaft gear at the corresponding position is fixed, meshed, and the one-way clutch on the engine rotation side is interposed in this path.

Therefore, since the drive shaft and the mowing PTO shaft are in a cantilever bearing state and unstable, the bearing strength must be increased, and the gear train for transmitting engine rotation is housed in the case, so the width of the M case is large. growing.

The biggest drawback of this conventional structure is that the mowing PTO pulley can be arranged only on the side opposite to the side where the continuously variable transmission is attached. This greatly limits the degree of freedom in designing the reaper power transmission path.

The present invention makes the harvesting PTO shaft support the auxiliary transmission,
While achieving compactness, the mowing PTO pulley can be freely arranged on either side of the continuously variable transmission or its opposite side.

(D) Means for Solving the Problems The problems to be solved by the present invention are as described above. Next, means for solving the problems will be described.

A one-way clutch C1 which connects an input shaft 2 of a continuously variable transmission H to an engine, drives a traveling portion from an output shaft 4 of the continuously variable transmission H via an auxiliary transmission device, and transmits engine rotation as cutting rotation when the traveling portion is low speed. And a one-way clutch C2 for transmitting rotation that is synchronized with the traveling speed at high speed, the harvesting PTO shaft 1 is laterally laid inside the mission case, and the other end of the harvesting PTO shaft 1 projected outside the mission case. And the input shaft 2 are connected by a belt transmission mechanism, and the one-way clutch C is provided in the transmission path.
1, the drive shaft 6 of the auxiliary transmission is hollow, and the one-way clutch C is mounted on the harvesting PTO shaft 1.
It is installed by interposing 2.

Further, instead of the belt transmission mechanism, the input shaft 2 and the cutting PTO
The transmission 1 is connected to the shaft 1 by a gear transmission mechanism, accommodated in a side cover A mounted on the side wall of the mission case, and has the one-way clutch C1 in its transmission path.
Is installed.

Further, instead of the drive shaft 6, the driven shaft 7 of the auxiliary transmission has a hollow shape, and the one-way clutch C is provided on the harvesting PTO shaft 1.
It is installed by interposing 2.

(E) Embodiments The problems to be solved and means for solving the present invention are as described above, and the structure of the embodiments shown in the accompanying drawings will be described below.

FIG. 1 is a rear sectional view of a transmission case showing a combine harvesting power extraction mechanism of the present invention, FIG. 2 is a rear sectional view showing another embodiment in which the position of the harvesting PTO shaft 1 is different, and FIG. 3 is an engine rotation. 4 is a rear surface sectional view showing another embodiment of the power transmission mechanism of FIG. 4, FIG. 4 is a rear surface sectional view showing the engine rotation transmission path of FIG. 3, and FIG. 5 is a rear surface showing another embodiment of the engine rotation transmission path. FIG. 6 is a cross-sectional view showing changes in the rotation speed of the mowing PTO shaft 1.

In FIG. 1, the overall structure will be described. An HST-type main transmission, which is an example of the continuously variable transmission H, is attached to the left side surface of the mission. The pump shaft 3 of the HST type main transmission has an end portion of an input shaft 2 penetrating from the other end of the transmission case and coupled to the pump shaft 3.

Therefore, the rotation of the input shaft causes the pump shaft 3 to move continuously.
Driving the hydraulic pump, the discharged pressure oil rotates the hydraulic motor in the HST type main transmission, and drives the output shaft 4 constituted by the motor shaft.

The gear 32 on the output shaft 4 meshes with the gear 33 on the intermediate shaft 5, and meshes with the gear 34 on the auxiliary transmission drive shaft 6, which is one of the gear 33 traveling auxiliary transmission shafts. There is.

The auxiliary transmission drive shaft 6 has a hollow shape, and transmission gears 25, 26, 27 are arranged on splines on the outer periphery of the auxiliary transmission drive shaft 6. Sliding of the transmission gears 25, 26, 27 causes the auxiliary transmission driven shaft 6 to follow the auxiliary transmission. Driven gears 28, 29.3 on shaft 7
It selectively meshes with 0 to form a gear sliding type auxiliary transmission.

In the embodiment shown in FIG. 1, in the traveling auxiliary transmission device constituted by the auxiliary transmission drive shaft 6 and the auxiliary transmission driven shaft 7, the rotation in synchronization with the traveling speed is transmitted to the inside of the auxiliary transmission drive shaft 6 at high speed. Mowing PTO via one-way clutch C2
It is arranged on the axis 1.

The rotation after the sub-gear transmitted to the sub-gear driven shaft 7 is generated by the gear 2
9 is transmitted to a gear 31 on the steering shaft 8 and the steering shaft 8
The rotation after being steered by the
After passing through R, it is transmitted to the drive sprocket shafts 13L and 13R and drives a traveling unit (not shown).

From the above, in the configuration of FIG. 1, the drive pulley 11 for transmitting the rotation from the engine to the mowing PTO shaft 1 is fixedly provided on the input shaft 2, and the mowing PTO shaft is also provided via the belt 15. 1 transmits power to a driven pulley 14 fixed to a portion protruding to the right side of the mission case.

An engine rotation transmitting side one-way clutch C1 is interposed between the driven pulley 14 and the mowing PTO shaft 1.

The relationship between the one-way clutch C1 that transmits the engine rotation as the cutting rotation at the low speed and the one-way clutch C2 that transmits the rotation synchronized with the traveling speed at the high speed will be described. First, the rotational direction of the driven pulley 14 and the drive shaft 6 will be described. Are set to be the same, and then the orientations of the engaging elements of C1 and C2 are the same, and the cutting PTO shaft 1 is set to be driven by the rotation of the driven pulley 14 and the drive shaft 6.
This allows the driven pulley 14 to rotate more than the drive shaft 6 rotates.
When the rotation speed is faster, the one-way clutch C1 that transmits the engine rotation as the cutting rotation is engaged at the low speed, and the one-way clutch C2 that transmits the rotation synchronized with the traveling speed idles at the high speed. When the rotation of the drive shaft 6 exceeds the rotation of the driven pulley 14, the one-way clutch C is engaged and the one-way clutch C1 idles.

Therefore, the rotation shown in FIG. 6 is obtained in the cutting PTO shaft 1.

A mowing PTO pulley 9 is fixed to a portion where the mowing PTO shaft 1 projects to the left side of the mission case.

Next, in the embodiment of FIG. 2, not the auxiliary transmission drive shaft 6 but the auxiliary transmission driven shaft 7 is hollow, and a one-way clutch C2 for transmitting rotation synchronized with the traveling speed at high speed is interposed. Are arranged on the harvesting PTO shaft 1.

The point that power is transmitted from the drive pulley 11 of the input shaft 2 to the driven pulley 14 of the harvesting PTO shaft 1 via the belt 15 is the same.

In addition, a one-way clutch C1 that transmits engine rotation as cutting rotation at low speed is also interposed between the driven pulley 14 and the cutting PTO shaft 1.

Since the rotation of the auxiliary shift driven shaft 7 is also taken out by the mowing PTO shaft 1, the rotation of the mowing PTO shaft 1 is also 3 as shown in FIG.
Change in steps.

This will be described with reference to the embodiment shown in FIGS.

FIG. 4 shows the engine rotation transmission path of FIG. 3 with a different cross section.

The embodiment of FIG. 3 differs from the embodiment of FIGS. 1 and 2 in that the engine rotation transmission path from the input shaft 2 to the mowing PTO shaft 1 is performed by a gear train provided inside the mission case. That is.

Therefore, the gear 18 on the pump shaft 10 that drives the hydraulic pumps P1 and P2 that feeds pressure oil to the hydraulic clutch brake on the steering shaft 8 also serves as a power transmission path.

A shaft 16 is arranged below the pump shaft 10, and a gear 17 on the shaft 16 and a gear 18 on the pump shaft 10 are meshed with each other. Then, the gear 23 at the other end of the shaft 16 causes the cutting PTO shaft 1 to move.
Further, at low speed, it is always meshed with a gear 24 which is loosely fitted through a one-way clutch C1 which transmits engine rotation as cutting rotation.

A side cover A for guiding pressure oil from the hydraulic pumps P1 and P2 to the hydraulic clutch brake is attached to the mission case, and the side cover A is provided with a space for accommodating the gears 23 and 24.

By connecting a lubricating oil passage formed in the side cover A to the accommodation space, a one-way clutch C1 for transmitting engine rotation as cutting rotation at low speed, and a one-way clutch for transmitting rotation synchronized with traveling speed at high speed Lubrication of the clutch C2 can be achieved.

The one-way clutch C1 is provided with the same engagement condition as the one-way clutch C1 shown in FIGS.

In the embodiment of FIG. 5, the overall configuration is the same as that of the embodiment of FIG. 3, but the arrangement of the one-way clutch C1 of the engine side power transmission system is the same for the pump shaft 10 and the pump shaft 10. It is interposed between the shaft 19 and the shaft 19. By providing an oil passage inside the pump shaft 10, the hydraulic pump P
Since a part of the leak oil of 1 · P2 is sent to the one-way clutch C1 provided on the pump shaft 10 for lubrication, idling wear is prevented.

Further, power is transmitted from a gear 21 on the shaft 19 to a gear 22 on the shaft 20, and a gear 23 on the shaft 20 is transmitted to a gear 24 fixedly installed on the harvesting PTO shaft 1.

(F) Effects of the Invention Since the present invention is configured as described above, it has the following effects.

Firstly, the reaping P that can obtain rotation synchronized with the vehicle speed.
Since the TO shaft 1 can be arranged as a dual shaft structure inside the traveling auxiliary transmission shaft, the power transmission system can be made compact and the mission case can be arranged in comparison with the case where the mowing PTO shaft 1 is separately arranged. It could be made small.

Secondly, the mowing PTO pulley 9 attached to the shaft end of the mowing PTO shaft 1 can be arranged on either side of the mission case (in other words, on the side of the continuously variable transmission or on the opposite side thereof). It was possible to easily adapt to the layout of the power transmission paths of the parts and increase the degree of freedom in design.

Thirdly, when the harvesting PTO shaft 1 is not synchronized with the vehicle speed, the two one-way clutches are eliminated and the hollow shaft 6 or 7 is attached to the harvesting PTO shaft 1 so as not to rotate relative to each other. The take-out mechanism can be easily rebuilt.

[Brief description of drawings]

FIG. 1 is a rear sectional view of a transmission case showing a combine harvesting power extraction mechanism of the present invention, FIG. 2 is a rear sectional view showing another embodiment in which the position of the harvesting PTO shaft 1 is different, and FIG. 3 is an engine rotation. 4 is a rear surface sectional view showing another embodiment of the power transmission mechanism of FIG. 4, FIG. 4 is a rear surface sectional view showing the engine rotation transmission path of FIG. 3, and FIG. 5 is a rear surface showing another embodiment of the engine rotation transmission path. FIG. 6 is a cross-sectional view showing a change in the number of revolutions of the mowing PTO shaft 1, and FIG. 7 is a diagram showing an output rotation of the mowing PTO shaft 1 when the auxiliary gear shift is performed in three stages. C1 ... One-way clutch that transmits engine rotation as cutting rotation at low speed C2 ... One-way clutch that transmits rotation synchronized with running speed at high speed H ... Continuously variable transmission 1 ... Mowing PTO shaft 2 ... Input shaft 6 ... Auxiliary shift drive shaft 7 ... Auxiliary shift driven shaft

Claims (3)

[Scope of utility model registration request] 1. An input shaft 2 of a continuously variable transmission H is connected to an engine, an output shaft 4 of the continuously variable transmission H drives a traveling portion via an auxiliary transmission device, and when the traveling portion is at a low speed, the engine rotation is taken as cutting rotation. The one-way clutch C1 for transmitting and the one-way clutch C2 for transmitting the rotation synchronized with the traveling speed at high speed are interleaved with the mowing PTO shaft 1, and the mowing PTO is projected outside the mission case. The other end of the shaft 1 and the input shaft 2 are connected by a belt transmission mechanism to interpose the one-way clutch C1 in the transmission path, and the drive shaft 6 of the auxiliary transmission has a hollow shape so that the harvesting PTO shaft 1 A harvesting power take-out mechanism for a combine, wherein the one-way clutch C2 is installed on the top. 2. A side cover A mounted on the side wall of a mission case case by connecting the input shaft 2 and the mowing PTO shaft 1 by a gear transmission mechanism instead of the belt transmission mechanism according to claim 1. And the one-way clutch C1 is interposed in the transmission path thereof. 3. A mowing P having a hollow driven shaft 7 of the auxiliary transmission, instead of the drive shaft 6 according to claims (1) and (2).
By interposing the one-way clutch C2 on the TO shaft 1,
A combine harvesting power extraction mechanism characterized by being installed.