JPS6015971Y2 - Support structure for chain cladding - Google Patents

Description

[Detailed Description of the Invention] This invention mainly relates to a support structure for a chain tension plate in a chain tension structure in a drive transmission section of a rotary work machine.

Conventionally, this type of chain tension plate had its end fixedly fixed to the chain case, and no vibration isolation means was provided between it and the chain case.

For this reason, when the chain tension plate moves to follow the movement of the chain 7, the end of the chain tension plate fixed to the chain case becomes fatigued due to bending and loses its elasticity, making it unable to exert sufficient chain tensioning action. In addition, the vibration of the chain tension plate is directly transmitted to the chain case, causing bolts and the like that hold the chain tension plate in place to loosen.

This proposal was made in view of these shortcomings, and
It is an object of the present invention to provide a support structure for a chain tension plate configured to smooth the movement of the chain tension plate following the oscillation of the chain tension plate and to reduce vibrations transmitted from the chain tension plate to the chain case.

The present invention will be explained below based on embodiments shown in the drawings.

A is a rotary working machine connected to the rear part of a tractor 1, and a power transmission part 3 connected to the circle zero shaft 2 of the tractor 1 is provided at the center of the front part of the machine body, and a transmission main shaft provided in the power transmission part 3 is provided. 4 extends to one side of the machine body, and the main transmission shaft 4 and one end of the tilling shaft 5 are connected via a drive transmission section 6 to form a side drive type.

The drive transmission section 6 is constructed by suspending a drive chain 77 between a drive sprocket 4' provided on the transmission main shaft 4 and a transmission sprocket 5' provided on the tilling shaft 5.

Therefore, the power transmitted from the PTO shaft 2 to the main transmission shaft 4 is transmitted from the main transmission shaft 4 as a driving shaft to the tilling shaft 5 as a driven shaft via the drive chain 77, and the transmitted power rotates the tilling shaft 5. The plowing work will be done by moving the soil.

Reference numeral 8 designates a chain tension plate with an elastic plate supported at both ends within the chain case 9, and includes an arcuate portion 8' for the slack side 7' of the drive chain 77, and a drive sprocket 4 continuous to the arcuate portion 8'. It is composed of a connecting portion 7'' with a hooking portion 8'' and a connecting portion 7''.

Reference numeral 10.10 is a support shaft for pivotally supporting both ends of the chain tension plate 8, and the support shaft 10 uses a head bolt 10'.

In this case, the tip of the head bolt 10' is inserted from inside the chain case 9 into a through hole 11 bored in the inner wall 9' of the case, and the nut 12 is screwed into the extended portion through which it is inserted. It is directly attached, and a sealing material 13 is applied to the insertion portion with the through hole 11 to maintain airtightness.

14. 14 is a short pipe fixed to both ends of the chain tension plate 8. By loosely fitting the short pipe 14 into the bolt 10' with the stopper stopper 15 held in place by the bolt head 15, the chain tension plate 8 Both ends are rotatably supported on support shafts 10.10.

Reference numeral 16 denotes a cylindrical anti-vibration comb fitted onto the bolt 10', with one end surface facing the inner surface of the case inner wall 9' and the other end surface facing the washer 17 and the end surface of the short tube 14. It is interposed between the chain case inner wall 9' and the chain tension plate 8.

In addition, what is indicated by 18 in the figure is the hanging part 8 of the chain tension plate 8.
This is a holding plate provided so as to hold the chain tension plate 8, and is used to maintain the tensioned state of the chain tension plate 8.

Therefore, during power transmission, the drive chain 77 transmits power in a tensioned state with its slack side 7' pressed by the arcuate portion 8'.

In this case, slight vibrations that follow the vibration of the drive chain 77 occur in the chain tension plate 8, and especially at the start of power transmission,
When stopped or when a sudden shock is applied, the chain tension plate 8 also vibrates with a large amplitude following the large vibration of the drive chain 77, but the end of the chain tension plate 8 rotates with respect to the support shaft 10. Since the end of the chain tension plate 8 is rotatably supported, the end of the chain tension plate 8 can freely rotate around the support shaft 10 due to its vibration, and the end does not suffer from fatigue due to bending. The shaft 10 is reliably supported by being directly cantilevered to the chain inner wall 9', and the vibrations of the chain tension plate 8 are absorbed by the anti-vibration goth 16 and directly transmitted to the chain case 9. never transmitted.

As mentioned above, according to the present proposal, the chain tension plate or the driving chain 7
Since it can follow the oscillation of the chain and move smoothly, it not only makes full use of the chain tensioning effect, but also reduces fatigue at the ends, which improves the service life of the chain tension plate. There is.

Furthermore, since the vibrations of the chain tension plate are absorbed by the vibration-proof rubber, there is no loosening of bolts and nuts due to vibrations, unlike in the past, and furthermore, the noise accompanying the vibrations can be reduced.

[Brief explanation of drawings]

FIG. 1 is an overall side view showing a rotary working machine according to an embodiment of the present invention, FIG. 2 is a side view showing a chain tension plate, and FIG. 3 is a sectional view taken along the line II in FIG. 2. A...Rotary work machine, 8...Chain tension plate, 9...Chain case, 10...
・Support shaft, 16... Anti-vibration rubber.

Claims (1)

[Scope of utility model registration request] In the chain tension structure in which the chain tension plate 8 is supported within the chain case 9, the chain head plate 8 is supported from the inside of the chain case 9.10. The ends of '10' are inserted into the through holes 11, 11 bored in the inner wall 9' of the case, and nuts 12 and 12 are screwed into the extended portions inserted through the holes 11 and 11, respectively.
o' and to' are directly attached to the chain case 9 in a cantilevered state, and a sealing material 13 is attached to the insertion part with the through holes 11, 11.
, and attach short tubes 14, 14 to each bolt 10' and 10'.
One end surface is loosely fitted with the bolt head 15.15 received, and between the other end surface of the short tube 14, 14 and the inner surface of the case inner wall 9', a headed pole 10', Each short pipe 14,
14 in the axial direction is suppressed by the vibration isolating rubber 16, 16, and each short pipe 14, 14
The chain is characterized in that both ends of a chain tension plate 8, the middle part of which is curved in a hanging manner with respect to the connecting part 7'' of the driving chain 77 and the driving sprocket 4', are fixed. Support structure for veneers.