JPH04117545U - Combine power transmission structure - Google Patents

Abstract

(57) [Summary] [Configuration] A shaft 19 for extracting power to the reaping pre-processing section is rotatably supported in a transmission case 5 that houses a transmission system 4 from a continuously variable transmission that can freely switch forward and backward to the traveling section. let me,
The transmission gear 4B of the transmission system 4 is rotatably attached to the shaft 19, and a one-way clutch 2 is provided between the transmission gear 4B and the shaft 19, which transmits only rotation in the forward direction from the transmission gear 4B to the shaft 19.
2 is interposed, and a shaft portion 19A of the shaft 19 to which the one-way clutch 22 is mounted, and a shaft portion 19 that is continuous on one side in the axial direction of the shaft portion 19A.
Make the diameter different from B. [Effect] Centrifugal force accompanying rotation generates a flow of lubricating oil from the circumference of the shaft on the small diameter side to the circumference of the shaft on the large diameter side, ensuring lubrication, which is important for one-way clutches, with a simple configuration. It can be carried out.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

The present invention consists of a component configured to operate the reaping pretreatment section in conjunction with the traveling section. In detail, it is a continuously variable transmission structure that is linked to the engine and can freely switch forward and backward. A transmission case that houses the speed traveling device and the transmission system from the continuously variable transmission to the traveling section. The shaft supporting the transmission wheel of the transmission system is connected to the transmission case with one end connected to the transmission case. The shaft is rotatably supported in an outwardly protruding state, and a reaping pretreatment section is attached to the protruding end of the shaft. Attach a rotational transmission to the transmission wheel, and only rotate in the forward direction from the transmission wheel to the rotational transmission. Those equipped with a one-way clutch means that transmits the message, that is, when the traction device is reversed when reversing. It relates to something that is configured to prevent rolling, etc.

0002

[Conventional technology]

Conventionally, the one-way clutch means is constructed by combining a transmission wheel such as a gear and a shaft. The body is mounted in a rotating state, and a one-way clutch is interposed between the protruding end of the shaft and the rotating transmission. (for example, Japanese Patent Application Laid-Open No. 2-299509).

0003

[Problem that the idea aims to solve]

However, when using the above-mentioned conventional technology, only rotation in the forward direction is transmitted, and rotation in the reverse direction is transmitted. A one-way clutch that requires lubrication to maintain its intended function, which does not transmit rotation, is Because it is located outside the transmission case, it is used as a means of lubricating the one-way clutch. The lubricating oil inside the transmission case is splashed as the various transmission gears that make up the drive system rotate. There was a drawback that simple measures such as lifting and lubrication could not be adopted. The purpose of the present invention is to eliminate the above-mentioned drawbacks.

0004

[Means to solve the problem]

The characteristic configuration of the power transmission structure of the combine according to the present invention is that the one-way clutch means is In this structure, the transmission wheels are rotatably attached to a shaft, and the transmission wheels are connected between the transmission wheels and the shaft. a one-way clutch is interposed therein, and a shaft portion of the shaft to which the one-way clutch is attached; The difference is that the diameters of the shaft portions that are continuous on one side in the axial direction are different.

[0005]

[Effect]

Since a one-way clutch is interposed between the transmission wheel and the shaft, the forward direction of the transmission structure is Of course, it is possible to transmit only the rotation in the direction to the rotating gear, and the mission case Since the one-way clutch is located inside the transmission case, the lubricating oil inside the transmission case is It is possible to employ means for lubricating the one-way clutch by lifting it up. Besides, on the other hand Since the shaft part on which the opposite clutch is attached and the shaft part on one side are different, the rotation of the shaft is Due to the centrifugal force associated with This allows a flow of lubricating oil to flow from the circumferential surface of the shaft on the small diameter side to the circumferential surface of the shaft on the large diameter side. . As a result, lubricating oil flows onto the circumferential surface of the shaft on the small diameter side onto the raised wall surface. This pull causes the lubricating oil to flow in the axial direction and toward the upright wall. On the other hand, lubricating oil flows from the upright wall surface onto the circumferential surface of the shaft on the large diameter side. Due to the push caused by A flow is formed. In other words, it utilizes not only the lubricating oil's diffusion force on the shaft circumferential surface, but also the centrifugal force. can be used to supply lubricating oil to the one-way clutch.

[0006]

[Effect of the idea]

Therefore, according to the present invention, the one-way clutch is installed inside the transmission case. When the lubricating oil in the transmission case is splashed up and supplied to the one-way clutch, Not only is it possible to adopt a rational lubrication method that is simple in structure, easy to implement, but also , centrifugal force can be used for lubrication by simply machining the shaft by changing the diameter of the shaft. By providing good lubrication at the It has become possible to make the structure even simpler and easier to implement.

[0007]

【Example】

The power transmission structure of the combine is as shown in Figure 2. It includes a continuously variable transmission 2 that can be freely changed and a transmission system 4 from the continuously variable transmission 2 to the traveling section 3. and a mirror supporting the axles 3a of the pair of left and right crawlers 3A of the running section 3 at the bottom. rotation in the forward direction only from the cushion case 5 and the transmission system 4 to the reaping pretreatment section 6. The driving unit 3 and the reaping pre-processing unit 6 are driven synchronously by providing a power extraction means for taking out the power. It is composed of The continuously variable transmission 2 is a port in which a pump and a motor are housed in one housing 7. It is a hydraulic continuously variable transmission (HST) with an integrated pump and motor, and the input pulley 8 is An input shaft (pump shaft) 9, an output shaft (motor shaft) 10 and a charge pump 1 are provided. 1 is provided so as to protrude outward from one side of the housing 7. stop Then, touch the part of the housing 7 around the output shaft 10 to the side of the mission case 5. The cylindrical transmission system 4 is attached and rotatably supported on the upper part of the mission case 5. Install the output shaft 10 into the transmission case 5 with spline fitting to the input shaft 4A. It is attached.

[0008] The cylindrical input shaft 4A is connected to a boss portion 5A of the mission case 5, as shown in FIG. It can be inserted from the outside into the It is attached to the boss portion 5A via the hub portion 5A. The cylindrical input shaft 4A and the bearing 1 2A and 12B are those that have been pre-assembled in a predetermined state via a retaining ring 13 and a collar 14. The outer race of the outer bearing 12B has the outer end surface of the boss portion 5A. It comes into contact with the stepped part formed around the boss hole to regulate the amount of insertion from the outside, and the connection Positioning 15 that comes into contact with one side of the connected housing 7 and prevents it from being pulled out to the outside. is formed. The positioning 15 involves installing a retaining ring in the circumferential groove formed on the outer race. It is formed by fitting etc. And the positioning 15 is the outer bearing. The outer race of the ring 12B extends a set length outward from the outer end surface of the boss portion 5A. It is positioned so that it protrudes, and the protruding part of this lace is attached to the housing. The output shaft 10 and the cylindrical input shaft 4A are fitted into the hole 7A around the output shaft 10 in the ring 7. The positioning is done by aligning the axes of the Further, as shown in FIG. 3, an oil filter is provided at the upper end of the housing 7. 16 is screwed in, and around the oil filter 16 at the upper end is a , an annular groove 18 is formed to receive the leaked oil and guide it to the drain pipe 17. As shown in FIG. 1, the power extraction means is formed on the cylindrical input shaft 4A. A shaft 1 that supports a transmission gear (an example of a transmission wheel) 4B that meshes with and interlocks with a gear portion 4a. 9 into the transmission with one end protruding outward from the transmission case 5. It is supported by the case 5, and the protruding end of the shaft 19 is provided with a rotation transmission device for the reaping pretreatment section 6. Attach the output pulley 20, which is an example, and connect it from the transmission gear 4B to the output pulley 20. It is configured with a one-way clutch means that transmits rotation only in the forward direction. The one-way clutch means is located with a gap between the transmission gear 4B and the shaft 19. The transmission gear 4B is rotatably attached via a pair of bearings 12A and 12B. and the shaft 19, and a one-way clutch 22 is located between both bearings 12A and 12B. The shaft portion 19A of the shaft 19 to which the one-way clutch 22 is mounted is The shaft portion 19B is connected to one side in the axial direction of the shaft portion and on which one bearing 12A is attached. The bearing 12B is also large in diameter, and the other bearing 12B is connected to the other side in the axial direction. It is formed to have a smaller diameter than the shaft portion 19C to which it is attached.

[0009] Therefore, according to the above configuration, the lubricating oil inside the transmission case 5 due to splashing etc. is attached to the shaft 19 and transferred in order from shaft portion 19B → shaft portion 19A → shaft portion 19C due to centrifugal force. A moving lubricating oil flow is generated, and this lubricating oil flow lubricates the one-way clutch 22. be done.

0010 In addition, symbols are written in the claims section of the utility model registration for convenience of comparison with the drawings. However, the present invention is not limited to the configuration shown in the attached drawings.

[Brief explanation of drawings]

[Figure 1] Longitudinal cross-sectional view of main parts

[Figure 2] Schematic configuration diagram showing the transmission system

[Figure 3] Disassembled front view of main parts

[Explanation of symbols]

1 engine 5 Mission case 22 One-way clutch 2 Continuously variable transmission 6 Pre-reaping processing section 19A, 19B Shaft part 3 Running part 4B Transmission wheel body 4 Transmission system 19 axis

Claims (1)

[Scope of utility model registration request] Claim 1: A continuously variable transmission (2) that is linked to the engine (1) and can freely switch forward and backward, and a transmission system (4) from the continuously variable transmission (2) to the traveling section (3) are installed internally. A transmission case (5) is provided, and a shaft (19) supporting the transmission wheel body (4B) of the transmission system (4) is rotatably supported with one end protruding outward from the transmission case (5). A rotation transmission device (20) to the reaping pretreatment section (6) is attached to the protruding end of the shaft (19), and the transmission wheel body (4B)
This is a transmission structure for a combine that is provided with a one-way clutch means for transmitting only rotation in the forward direction from the rotary transmission device (20) to the rotation transmission device (20), and the one-way clutch means is configured such that the transmission wheel body (4B) is connected to the shaft. (19), and a one-way clutch (22) is interposed between the transmission wheels (4B) and the shaft (19). A power transmission structure for a combine harvester in which the diameter of a shaft portion (19A) on which a shaft is mounted and a shaft portion (19B) connected to one side in the axial direction of the shaft portion are different.