JPH0345556Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a power transmission mechanism for a reaping machine.

Conventionally, in reaping machines that connect the reaping section to the front of the machine and perform reaping work such as grain culms, the drive pulley of the transmission section and the reaping section are used to transmit power from the transmission section of the machine to the working section. Transmits power by suspending a belt between the passive pulley of the
In addition, a tension roller was pressed into contact with the belt and separated from the belt to form a tension clutch mechanism. However, when adjusting the reaping height by moving the reaping section up and down, the position of the driven pulley on the reaping section side is changed, and the state of suspension of the belt changes. The pressure of the clutch is not constant, and the clutch engages.
This had drawbacks such as unstable cutting operation.

This invention uses a tension clutch mechanism consisting of a belt and tension roller installed between the machine and the reaping section to maintain the tension clutch function, while also making it possible to freely adjust the vertical position of the clutch. , the tension clutch functions reliably even when adjusting the vertical position of the reaping section.
It is an object of the present invention to provide a power transmission mechanism for a reaping machine that can reliably transmit power to a reaping section and perform cutting operations.

To explain the embodiment of this invention in detail based on the drawings, A shows a cutting down type reaper as an example of a reaping working machine, and a cutting down working part 2 as a reaping part is installed in the front part of this machine 1. Furthermore, the working section 2 is connected via a hitch 3 connected to the body frame a of the management machine 1 so as to be vertically adjustable.

This machine 1 is configured such that a prime mover 4 is mounted on the rear part of a body frame a, power is transmitted from the prime mover 4 to a transmission part 5, and wheels 6 at the bottom of the transmission part 5 are driven. is configured to transmit power to the mowing section 2 as a reaping section.

The reaping work unit 2 has a plurality of substantially triangular guide plates 8 with a downward slope in the front arranged at regular intervals on a frame 7, and a star wheel 9 is pivotally supported at the base end of the guide plate 8. , A conveyor belt 11 having locking plates 10 protruding from the outer peripheral surface at a constant interval is rotatably suspended behind the guide plate 8.
2 is a driving wheel, and 13 is an idler wheel.

The upper end of the vertical shaft 14 of the drive wheel 12 is connected to the interlocking mechanism 15.
The gearbox 16 is arranged on a frame located behind the guide plate 8 and above the conveyor belt 11, and below the gearbox 16 is connected to a reaping blade 17. An interlocking mechanism 18 for transmitting power is connected, and the reaping blade 17 is attached to the frame below the base end of the guide plate 8.

A passive pulley 19 is located on the side of the gearbox 16.
A belt 21 is suspended between the drive pulley 20 provided in the mission section 5 of the machine 1 and power is transmitted from the mission section 5 to the gear box 16.

A bracket 22 having a U-shaped cross section is protruded from the rear side of the gearbox 16, and an outer cylinder 23 is fixed to the bracket 22 in the lateral direction. A boss 25 is loosely fitted into the protrusion of the pivot shaft 24 through which the boss 25 is inserted.
5 is fixed to a sector-shaped main part of the sector-shaped support plate 26, and the sector-shaped support plate 26 is configured to be freely rotatable about the pivot shaft 24.

A semi-circular long groove 27 is provided on the circumference of the fan-shaped support plate 26 around the pivot shaft 24.
The middle part of the roller support rod 28 whose base end is pivoted 30 to the end of the pivot shaft 24 is connected and fixed to the semicircular long groove 27 of the fan-shaped support plate 26 with the bolt 29 inserted through the semicircular long groove 27. It is structured as possible. Moreover, since the roller support rod 28 can be fixed in the middle with bolts 29 in any part of the semicircular long groove 27, the roller support rod 28 can be moved up and down around the pivot 30 pivoted on the pivot 24. It is configured so that it can be integrally connected to the fan-shaped support plate 26 at a predetermined vertical position.

31 is a tension roller connected to the tip of the roller support rod 28.

A spring 32 is interposed between the lower end of the fan-shaped support plate 26 and the frame 7 to bias the downward rotation, and a clutch wire 33 is connected to the upper end of the support plate 26 to connect the handle h of the machine 1. The clutch is extended to the top of the handlebar so that the clutch can be operated at the handlebar H portion.

34 is a clutch operating lever, and 35 is a riding section, which is detachably connected to the fuselage frame a via a connecting section 36.

The embodiment of this invention is configured as described above, and when performing cutting down work, the machine 1
While traveling, the cutting down work section 2 serving as a cutting section at the front takes in the grain culms along the guide plate 8, harvests them with the cutting blade 17, and transfers them to the conveyor belt 11 while raking them with the star wheel 9. Locking plate 1
In this work, the power is transmitted from the machine 1 to the cutting down work part 2 from the drive pulley 20 of the mission part 5 of the machine 1 to the belt. This is done in the power transmission system to the passive pulley 19 of the gearbox 16 via the belt 21.
As a tension clutch mechanism, a tension roller 31 is attached so as to be able to be freely pressed, and the clutch is operated to disconnect or disconnect power by pressing and separating the roller 31 by operating a clutch wire 33. Specifically, when the clutch wire 33 is left in a relaxed state, the spring 3
Due to the biasing operation of 2, the fan-shaped support plate 26 is
4, the roller support rod 28, which is integrally fixed to the semicircular long groove 27, is rotated downward about the pivot portion 30 at the base end, and the tension roller 31 21, and transmits power by means of a belt when the clutch is in the engaged state.On the other hand, the clutch wire 33 is tensioned to move the fan-shaped support plate 26 against the spring bias.
When the roller support rod 28 is rotated upward, the roller support rod 28 rotates upward around the pivot portion 30 to release the belt pressure contact of the tension roller 31 and set the clutch in the disengaged state. When the cutting down work part 2 as a reaping part is moved up and down, the position of the driven pulley 19 of the gearbox 16 is also changed due to the up and down movement of the work part 2, and the tension of the belt becomes different from the previous one. As a result,
Therefore, the bolts 29 in the semi-circular long grooves 27 of the fan-shaped support plate 26 are loosened to release the continuous fixation of the roller support rod 28 to the midway portion, and the roller support rod 28 is rotated up and down as appropriate around the pivot portion 30. Move and re-bolt 29
By integrally connecting the fan-shaped support plate 26 and changing the integrally connected position of the fan-shaped support plate 26 and the roller support rod 28 and shifting their relative positions, the tension roller 31 of the belt is The over-tensioned and over-relaxed states of the belt 21 caused by changing the crimping state and displacing the vertical position of the cutting-down working part 2 as a cutting part are adjusted to an appropriate tension, and the cutting-down work part 2 as a cutting part is adjusted to an appropriate tension. Even if the position of the working part 2 is displaced, an accurate and always constant tension can be ensured.

According to this invention, the tension clutch function is performed by vertically moving the fan-shaped support plate, and the roller support rod is connected to the support plate so that the fixed position can be changed. By changing the vertical position of the reaping section, even if the belt installed between the machine and the machine becomes slack or tense, the position where the roller support rod is fixed to the fan-shaped support plate can be adjusted vertically. , the pressure of the tension roller against the belt can be kept constant at all times, and it has the effect of achieving a reliable tension clutch function, and the adjustment operation can be easily performed, and the structure can be easily configured. have an effect. Further, in the present invention, the center part of the fan-shaped support plate 26 is fitted concentrically to the proximal pivot portion 30 of the roller support rod 28 and pivotably supported, and the peripheral edge of the support plate 26 has a long semicircular arc groove. 27
The middle part of the roller support rod 28 is configured to be rotatably fixed in the same groove while providing a biasing spring 3 at the lower end of the fan-shaped support plate 26.
2, and furthermore, the clutch wire 33 is directly connected to the upper end of the support plate 26, so that the roller support rod 28 and the fan-shaped support plate 26 can be securely connected and fixed relative to each other, and It can be easily adjusted, and the fan-shaped support plate 26 has a spring 3.
2 and the clutch wire 33 are directly connected, so the structure is simple.

[Brief explanation of the drawing]

Fig. 1 is an overall side view of the reaping machine with the power transmission mechanism according to the present invention, Fig. 2 is an explanatory diagram of the main parts, Fig. 3 is a plan view of the main parts, and Fig. 4 is the same as that shown in Fig. 2. −
Cross-sectional view of the line. A: Reaping work machine, 1: This machine, 2: Reaping section, 1
9: Passive pulley, 20: Drive pulley, 21:
Belt, 26: Fan-shaped support plate, 27: Semi-circular long groove, 28: Roller support rod, 31: Tension roller, 32: Spring, 33: Clutch wire.

Claims (1)

[Scope of utility model registration request] The tension roller 31 at the tip of the roller support rod 28 can be freely pressed against the belt 21 for power transmission stretched between the machine 1 and the reaping section 2, and the mounting height of the reaping section 2 relative to the main machine 1 can be varied. At the same time, a fan-shaped support plate 26 is attached to the pivot portion 30 at the base end of the roller support rod 28.
A semi-circular long groove 27 is provided on the periphery of the support plate 26, and a roller support rod 28 is rotatably supported at the center thereof.
By configuring the midway portion to be rotatably fixed to the same groove, the relative fixed position of the fan-shaped support plate 26 and the roller support rod 28 can be changed, and the fan-shaped A biasing spring 32 is provided at the lower end of the support plate 26, and a clutch wire 33 is directly connected to the upper end of the support plate 26, so that the roller support rod integrated with the support plate 26 can be moved up and down. This is a power transmission mechanism for a reaping machine, which is configured to perform a tension clutch function for a belt 21 via 28 tension rollers 31.