JP2574369Y2 - Combine harvester transmission structure - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION The present invention divides forward and reverse rotation output from a hydrostatic continuously variable transmission into two systems in a mission case, and transmits one of the branch powers to a traveling system. At the same time, a combine harvester configured to transmit only the forward rotation power of the other branch power from an output shaft provided on the lateral side of the mission case to a vertically movable harvester via a one-way clutch and a belt transmission mechanism. More specifically, the transmission structure is configured such that when the reaping unit is raised above the body by a certain amount or more, the transmission clutch of the reaping unit is automatically disengaged.

[0002]

2. Description of the Related Art Forward and reverse speed change outputs from a hydrostatic continuously variable transmission are branched into two systems in a mission case, and one of the branch powers is transmitted to a traveling system.
Combine harvesting part transmission structure configured to transmit only the forward rotation power of the other branch power from an output shaft provided on the lateral side of the mission case to a vertically movable cutting part via a one-way clutch and a belt transmission mechanism. as,
The technique described in JP-A-4-4350 is known. In the above-mentioned conventional structure, when cutting off the power of the mowing part raised when the machine body turns at the field end, the tension pulley of the belt transmission mechanism to the mowing part is artificially cut off.

[0003]

According to such a conventional structure, there is an inconvenience in that the power intermittent operation of the mowing part accompanying the rise of the mowing part at the time of turning the machine is troublesome. Therefore, it is conceivable that the transmission clutch of the reaping unit is automatically disengaged when the reaping unit is raised with respect to the body by a certain amount or more. That is, as a means for automatically disengaging the transmission clutch of the reaping unit when the reaping unit is raised with respect to the fuselage by a certain amount or more, for example, the one disclosed in Japanese Utility Model Laid-Open No. 1-79922 is known. . In this configuration, a lever-type artificial operation mechanism for turning on and off the tension pulley of the belt transmission mechanism to the mowing unit is provided.
When the reaping unit is raised with respect to the machine body by a certain amount or more, the reaping unit is brought into contact with the reaping unit, and a mechanical contact linkage mechanism for cutting and operating a tension pulley of the belt transmission mechanism is linked to the reaping unit. When the transmission clutch of the reaping unit is automatically disengaged in accordance with a rise above a certain level with respect to the machine body, during a lever-type manual operation mechanism, when the clutch lever is in the operating state, the tension arm is turned off. It is necessary to provide a flexible part or a mechanical contact linkage mechanism consisting of a contact arm, wire, etc., and the structure is complicated.
There is a disadvantage that the transmission clutch is not disengaged even if the mowing portion is raised above the body by a certain amount or more, so that the frequent wire length adjustment is inevitable. In the present invention, in order to prevent reverse transmission to the mowing part, the one-way clutch originally provided in the body is used well, and the mowing part is raised with respect to the body more than a certain amount while simplifying the structure. The purpose is to ensure that the belt transmission mechanism to the mowing part is cut off.

[0004]

According to a first aspect of the present invention, there is provided a combine harvester transmission structure for transmitting forward and reverse speed change output from a hydrostatic continuously variable transmission in two systems within a mission case. Branch and transmit one branch power to the traveling system, and only the forward rotation power of the other branch power
A harvesting unit transmission structure of a combine configured to transmit an output shaft provided on a lateral side surface of the mission case to a vertically movable cutting unit via a one-way clutch and a belt transmission mechanism, wherein the output shaft, the output pulley, The one-way clutch is interposed between the inner race and the outer race, and a taper roller is mounted in an inclined position between the inner race and the outer race, and the outer race is displaced in the axial direction to increase or decrease the interval between the inner and outer races. When the mowing portion is raised to a set height or more as the cutting portion rises, the outer race of the one-way clutch is brought into contact with a member for displacing the outer race along the axial center direction together with an output pulley in which the outer race is fixed. Pressing increases the inner and outer race intervals in the one-way clutch. Wherein configuration that is provided with a contact member to be in the cutting unit.

According to a second aspect of the present invention, there is provided a combine harvesting portion transmission structure according to the first aspect, wherein the one-way clutch is configured to be driven to rotate about a horizontal axis, and the harvesting is performed. When the support frame constituting the support member of the section becomes higher than the set height with the rise of the mowing section, the outer race of the one-way clutch contacts and presses against a member which is displaced along the horizontal axis. The contact member is provided on the support frame so that the inner and outer race intervals in the one-way clutch are increased, and the member to be displaced actuates a force received by contact with the upward movement of the contact member, The outer race is configured to be changed to an operating force for displacing the outer race along the horizontal axis.

[0006]

According to the structure of the first aspect of the present invention, when the mowing portion rises above the set height as the mowing portion rises, the contact member provided on the mowing portion displaces the outer race of the one-way clutch along the axial direction. The pressing force is applied to the member to be pressed, thereby increasing the distance between the inner and outer races in the one-way clutch.Therefore, the transmission of power via the taper roller is interrupted. The transmission is cut off.

According to a second aspect of the present invention, specifically, as shown in FIG. 6, a cylindrical frame 16 as a support frame constituting a support member of the cutting unit is mounted on the body. When the cylindrical frame 16 is raised above a certain level,
A lever 19a integral with a shift fork 19 for sliding the output pulley 12 rotating about a horizontal axis with respect to the belt transmission mechanism 13 from the mission case M to the mowing part in the horizontal axis direction. , The lever 19a swings upward, and the upward swing causes the shift fork 19 to pull the output pulley 12 toward the mission case M, thereby causing the outer race 1 to swing.
4b is displaced in the axial direction together with the output pulley 12, so that the distance between the inner race 14a and the inner race 14a is increased, and power transmission via the taper roller 15 is cut off. That is, using the support frame configured as a strength member, the one-way clutch converts the upward contact pressing force of the contact member during a movement trajectory of the support frame ascending with the rise of the mowing portion. A member that displaces the outer race in the axial direction is exposed, so that the ascending movement force of the support member is mechanically converted into an operating force to move the outer race in the horizontal axis direction, and the automatic movement is automatically performed. Transmission of transmission in the one-way clutch can be cut off.

Therefore, according to the first aspect of the present invention, the one-way clutch for transmitting the forward rotation power to the mowing part originally provided in the machine body is modified into a tapered roller type one-way clutch. Then, the power is used for the clutch for interrupting power, so that the power can be disconnected while simplifying the structure.

Further, since the output pulley having a taper roller type one-way clutch is directly contacted with the contact member provided on the cutting section, the contact member and the belt tension pulley of the belt transmission mechanism are connected by wires. As in the case of linking via a linked mechanism, power can be reliably cut off without elongation of the wire.

According to the second aspect of the present invention, the contact member is provided on the support frame of the mowing portion, and the force received by the contact caused by the upward movement of the contact member is applied to the outer race by the horizontal axis. By configuring the member for displacing the output pulley so as to change to the operating force for displacing along the core, the support frame for the output pulley rotated about the horizontal axis when the cutting portion is raised with respect to the output pulley. In order to move the outer race integral with the output pulley in the one-way clutch laterally in the movement trajectory of the one-way clutch, it is easier to face a member that converts the rising movement force of the support frame into an operating force that displaces the outer race along the axis. Therefore, there is an advantage that it is possible to obtain a mechanical transmission blocking structure accompanying the rise of the mowing portion by a simple arrangement structure.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. As shown in FIG. 7, a threshing device 3 is mounted on a body frame 2 provided with a crawler traveling device 1, and a raising device 4 for raising a lodging grain culm is provided at a front portion of the traveling machine body. A cutting unit 5 that cuts the root of the stock, and a vertical conveying device 7 that conveys the cut grain stem to the threshing device 3 are arranged so as to be able to move up and down freely to constitute a self-removable combine. is there.

As shown in FIG. 4, the transmission system of the combine is transmitted from the engine E to the threshing device 3 via the first belt transmission mechanism 8, and is transmitted from the second belt transmission mechanism 9 to the hydrostatic stepless transmission. 10 to the transmission in the traveling mission case M, and in the traveling mission case M,
The forward and reverse speed change output from the hydrostatic continuously variable transmission 10 is branched into two systems, one of which is transmitted to the crawler traveling device 1, and the other is only the forward power of the other branch power. , A roller bearing type one-way clutch C and a third one interposed between an output shaft 11 and an output pulley 12 provided on a lateral side surface of the mission case M. It is configured to transmit to a reaping section A which can be moved up and down via a belt transmission mechanism 13.

As shown in FIG. 1 and FIG.
1 and the output pulley 12 include a one-way clutch C, an inner race 14a having an outer peripheral surface formed into a conical surface, and an outer race 14a having an inner peripheral surface formed into a conical surface.
5, a taper roller 15 is loaded so as to roll around an axis Z inclined with respect to the axis X of the output shaft as shown in FIG. Only the forward rotation power of the generated power is transmitted to the cutting unit A.

That is, when the output shaft 11 is driven to rotate in the direction of arrow F, the taper roller 15 is rolled in the direction of arrow G on the inner race 14a by the inner race 14a as shown in FIG. As a result, the tapered roller 15 moves to the side where the interval between the conical surfaces of the inner race 14a and the outer race 14b is smaller, and the tapered roller 15 is sandwiched between the conical surfaces of the inner race 14a and the outer race 14b. Thus, the inner race 14a and the outer race 14b are integrated, and the power of the output shaft 11 is transmitted to the output pulley 12.

When the output shaft 11 is driven to rotate in a direction opposite to the direction F of the arrow, the taper roller 15 is rolled in a direction opposite to the arrow G, whereby the taper roller 15 is rotated. Moving to the side where the interval between the conical surfaces of the inner race 14a and the outer race 14b is larger,
As a result, the pinching phenomenon of the taper roller 15 does not occur, and power is not transmitted. The power of the one-way clutch C is cut off when the mowing unit A is raised with respect to the body by a certain amount or more in a state where the forward rotation power is transmitted to the mowing unit A.

The structure for cutting off the power of the one-way clutch C when the mowing portion A rises above the body by a certain amount or more is a supporting member which is also used as a transmission case of the mowing portion A, as shown in FIGS. The output pulley 12 is provided on a side surface of a cylindrical frame 16 which constitutes a supporting frame.
A contact member 17 that contacts the outer race 14b when the reaping portion A is raised with respect to the body by a certain amount or more, and the contact member 17 contacts the side surface of the output pulley 12. Is pressed together with the output pulley 12 toward the mission case M, so that the distance between the inner race 14a and the power supply is cut off. Here, when the contact member 17 is pressed against the contact, the output pulley 12 is also used as a member for displacing the outer race 14b along the axial direction thereof, and is displaced together with the outer race 14b.

When the mowing part A is lowered to the mowing work position, the contact member 1 with respect to the output pulley 12
7 is released, and the transmission of power can be returned by the return spring 18. The third belt transmission mechanism 13 is provided with a tension pulley that is linked to a lever-type manual operation mechanism that can arbitrarily connect and disconnect the power to the mowing unit.

[Other Embodiment] As shown in FIG. 6, a lever 19a of a shift fork 19 for operating an output pulley 12 is provided with a structure in which the power of a one-way clutch is cut off as the mowing unit rises above the body with a certain degree or more. The mowing part A may be provided so as to be able to contact the side surface of the cylindrical frame 16. In this case, the lever 19a and the shift fork 19
A member that changes the outer race 14b to an operating force for displacing the outer race 14b along the horizontal axis X, which is the center of rotation thereof, by receiving the contact force associated with the upward movement of the contact member 17 that rises together.

In the claims of the utility model registration, reference numerals are written for convenience of comparison with the drawings, but the present invention is not limited to the configuration of the attached drawings by the entry.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a one-way clutch.

FIG. 2 is a schematic diagram showing a relative positional relationship between an output pulley and a contact member.

FIG. 3 is a schematic diagram showing a relative positional relationship between a cylindrical frame and a traveling mission case.

FIG. 4 is a schematic diagram of a transmission system.

FIG. 5 is a development view of a tapered roller.

FIG. 6 is a longitudinal sectional view showing another embodiment.

FIG. 7 is a side view of the front of the combine.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Hydrostatic continuously variable transmission 11 Output shaft 12 Output pulley 13 Belt transmission mechanism 14a Inner race 14b Outer race 15 Taper roller 16 Support member 17 Contact member 19, 19a Member to be displaced and actuated A Cutting part C One-way clutch M Mission case

Claims (2)

(57) [Scope of request for utility model registration] 1. A transmission output of a forward rotation and a reverse rotation from a hydrostatic continuously variable transmission (10) is branched into two systems in a mission case (M), and one branch power is transmitted to a traveling system. At the same time, only the forward power of the other branch power is supplied from the output shaft (11) provided on the lateral side of the mission case (M) to the one-way clutch (C) and the belt transmission mechanism (1).
3) a harvesting portion transmission structure of a combine configured to transmit to a vertically movable cutting portion (A) via a 3), wherein the one-way clutch (11) is provided between the output shaft (11) and an output pulley (12). C) and the one-way clutch (C) is connected to the inner race (14a).
Between the outer race (14b) and the tapered roller (1)
5) is configured in a roller bearing type in which the outer race (14b) is displaced in the axial direction to increase or decrease the interval between the inner race and the outer race, and the reaper (A) is set as it rises. More than height
And the outer race (1) of the one-way clutch (C).
4b) with an output pulley (12) in which it is fixed
Abuts and presses the member that is displaced along the axis
In this way, the one-way clutch (C)
Abutment member (17) to increase the distance
The harvesting part transmission structure of the combine provided in the cutting part (A) . 2. The cutting mechanism according to claim 1, wherein the one-way clutch (C) is configured to be driven to rotate about a horizontal axis, and a support frame (16) constituting the support member of the cutting part (A) is provided by the cutting part (C). When the height of the outer race (14b) of the one-way clutch (C) becomes higher than the set height with the rise of (A), the outer race (14b) of the one-way clutch (C) is pressed against the members (19, 19a) which are displaced along the horizontal axis. The contact member (17) for increasing the distance between the inner and outer races in the one-way clutch (C) is provided on the support frame (16), and the members (19,
19a) is configured to change the force received by the contact due to the upward movement of the contact member (17) into an operating force for displacing the outer race (14b) along the horizontal axis. The harvesting unit transmission structure of a combine according to claim 1, wherein: