JP2532416Y2 - Bucket chain - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bucket chain formed by connecting an outer link and an inner link, and more particularly to a bucket chain capable of achieving high speed and long life of the chain.

[0002]

2. Description of the Related Art In general, a continuous unloader for handling loose objects is provided with a plurality of buckets for scraping and continuously transporting the conveyed articles. These buckets are attached to an endless chain at equal intervals. It is moving up and down. In this type of bucket chain, for example, a configuration as shown in FIG. 5 is employed.

As shown in FIG. 1, a chain 1 has a pair of outer links 2, 2 and a pair of inner links 3, 3, which are longitudinally connected to each other. , 2 are connected to each other by a pin member 4 with inner links 3, 3 positioned therebetween. The pin member 4 is inserted into the inner links 3 and 3, and both ends are inserted into insertion holes 2 a formed in the outer links 2 and 2 and are integrally fixed thereto. A bush 5 sandwiched between the outer links 2 is slidably provided on the outer peripheral portion of the pin member 4 so as to surround the outer periphery. That is, as shown in FIG. 6, the inner peripheral portion of the bush 5 is slidably provided on the outer peripheral portion of the pin member 4, and the outer peripheral portion of the bush 5 is pressed into the insertion hole 3 a opened in the inner link 3. Therefore, when the chain 1 moves at a predetermined curvature, the bush 5 slides around the pin member 4.

Further, in the unloader, a chain 1 is stretched between sprockets (not shown) arranged vertically, and a guide rail (not shown) for guiding the movement of the chain 1 is provided between the sprockets. . In order to reduce the wear of the chain 1 guided along the guide rail and reduce the vibration of the bucket, a roller 6 sandwiched between the inner links 3 is slidably provided on the outer periphery of the bush 5. Is provided.

Therefore, in order to increase the speed and extend the life of the bucket chain 1, it is necessary to smooth the slidability between the pin member 4 and the bush 5 and between the bush 5 and the roller 6 to reduce wear. Is required.

[0006]

In the case of an unloader handling loose objects such as coal and grains, dust enters between the pin member 4 and the bush 5 from the gap X between the outer link 2 and the inner link 3. In order to prevent this, a shaft seal structure as shown in FIG. 6 is employed. That is, a ring groove 7 is formed at the end of the bush 5 at the inner peripheral portion, and the O-ring 8 is held in the ring groove 7.
Therefore, the space between the pin member 4 and the bush 5 is sealed from both sides, and it is possible to prevent intrusion of dust.

On the other hand, as the wear of the pin member 4 and the bush 5 progresses, a gap Y is formed between the pin member 4 and the bush 5, as shown by a chain line in FIG. Occurs. Such rattling frequently hits the O-ring 8 sandwiched between the pin member 4 and the bushing 5, so that the O-ring 8 is damaged earlier and its elastic force is lost. Become. For this reason, in such a shaft seal structure, there was a problem that sufficient lubricating property could not be obtained and that intrusion of dust could not be prevented. Dust intrusion also occurs between the bush 5 and the roller 6 sliding around the bush 5.

Further, since the ring groove 7 is formed at the end of the bush 5 along the inner periphery thereof, the substantial surface pressure of the bush 5 against the pin member 4 is reduced, and the progress of wear is accelerated. In addition, there is a disadvantage that the strength is insufficient and the life of the chain 1 is shortened. Further, when the O-ring 8 is used in dust, the life of the O-ring 8 becomes short in a short time due to the durability of the sliding surface, and the sealing effect is lost.

The present invention has been made to effectively solve the above problems.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a bucket chain capable of reliably preventing dust from entering and delaying abrasion of a sliding portion, thereby achieving high speed and long life of the chain.

[0011]

According to the present invention, a pair of outer links are connected by a pin member, and a bush sandwiched between the outer links is slidably provided so as to surround an outer peripheral portion of the pin member. At the same time, a pair of inner links at both ends of the bush
Their together to support, in a bucket chain of provided slidably The filtrate over La so as to surround the outer peripheral portion of the bush between the inner link, to form a holding groove on the end of the bushing
Cover the pin member on the bush end on the inner peripheral side of the
The holding portion is formed by extending to the side, and the elastic groove is provided in the holding groove.
Support between the elastic ring and the outer link.
This is the one with a ring .

When a holding groove is formed at the end of the roller,
Both cover the bushing on the inner roller end and the inner link
Forming a holding part by extending to the inside of the
Support the ring and between the elastic ring and the inner link
Preferably, a seal ring is interposed.

Further, the outer ring of the seal ring contacts
The contact part is formed on the surface to be
The seal ring, the elastic ring and the connecting pin.
A seal chamber is formed between the
Oil supply passage for oiling the sliding surface between the member and the bush
To supply oil to the seal chamber from the oil supply passage.
Used from the tapered part of the above seal ring through the contact part
It is good to discharge the used oil.

[0014]

According to the first aspect of the invention, the seal ring supported by the elastic ring is interposed between the inner portion of the outer ring and the end of the bush by being pressed against the inner portion of the outer ring.
Even if the abrasion of the pin member and the bush progresses, it is possible to oil seal the gap formed between the pin member and the bush and to prevent the intrusion of dust.

In the second invention, since the seal ring supported by the elastic ring is interposed between the inner portion of the inner ring and the end of the roller by being pressed against the inner portion of the inner ring, the bush and Even if the wear of the rollers progresses, the gap formed between them can be oil-sealed and the intrusion of dust can be prevented.

In the third invention, the outer ring of the seal ring is provided.
A contact part is formed on the surface in contact with the
Form a tapered part on the seal ring and elastic ring
A seal chamber is formed between the
Lubrication for lubricating the sliding surface between the bushing member and the bush
Since the passage was formed, oil was supplied from the oil supply passage to the seal chamber.
And the contact part from the tapered part of the seal ring.
The used oil can be discharged through this.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to the accompanying drawings.

FIG. 1 shows a bucket chain according to the first invention. In a bucket chain 11 used for an unloader, a pair of outer links 12, 12 and a pair of inner links 13, 13 are formed. The chains 12, 12 and 13, 13 are connected longitudinally and the outer links 1
The inner links 13, 13 are positioned between the pins 2, 12 and are connected to each other by a pin member 14. The pin member 14 is inserted into the inner links 13 and 13 and both ends are connected to the outer link 1.
It is inserted into the insertion hole 12a formed in 2 and 12, and is integrally fixed to this.

A bush 15 sandwiched between the outer links 12, 12 is slidably provided on the outer peripheral portion of the pin member 14 so as to surround the outer periphery of the pin member 14. The outer peripheral portion of the bush 15 is opened to the inner link 13. The bush 15 slides around the pin member 14 when the chain 11 runs at a predetermined curvature. Also,
A roller 16 sandwiched between the inner links 13 is slidably provided on an outer peripheral portion of the bush 15.

In particular, a seal ring 21 is provided between the end of the bush 15 and the inner portion 12b of the outer link 12,
An elastic ring 22 made of rubber is provided between the seal ring 21 and the end of the bush 15 to press the seal ring 21 against the inner portion 12b of the outer link 12 to elastically support the pin member 14 in the axial direction. . That is, a side seal structure for sealing from both axial sides of the bush 15 is employed.

More specifically, as shown in FIG. 2, a seal ring 21 is formed of nitrided steel or SUS304, and a taper portion 23 is formed on the seal ring 21 at a predetermined angle. Then, a flat contact portion 24 that contacts the inner portion 12b of the outer link 12 is left, and a ring-shaped groove 25 that is sequentially enlarged radially inward is formed between the seal ring 21 and the outer link 12. A holding groove 26 for holding the elastic ring 22 is formed in the seal ring 21, and a holding groove 27 for holding the elastic ring 22 is formed substantially at the center of the end of the bush 15. Outer holding groove 27 formed in the bush 15 facing the inner portion 12 b of the outer link 12 is open to shaped-shaped or U cross-section substantially U, across the elastic ring 22 at the end of the bush 15 The holding portions 28 and 29 that define the holding groove 27 are formed by extending to the link 12 side. Accordingly, a seal chamber 31 is formed between the outer link 12 and the bush 15 to accommodate the seal ring 21 and the elastic ring 22 held in a compressed state.

As shown in FIG. 1, an oil supply passage 32 is formed in the pin member 14, and the oil supply passage 32 extends in the axial direction of the pin member 14 and is folded back in the radial direction to connect the pin member 14 and the bush. 15 and refueling.

Therefore, in the thus constructed seal structure, the oil A is pushed into the oil supply passage 32 to lubricate between the pin member 14 and the bush 15. In particular, since the seal ring 21 elastically supported by the elastic ring 22 is pressed against the outer link 12 between the inner portion 12 b of the outer link 12 and the end of the bush 15, the seal ring 21
Contact portion 24 always slides along the inner portion 12b of the outer link 12 to seal. Therefore, even if the pin member 14 and the bush 15 are worn and a gap is formed therebetween, the seal ring 21 is not caught in the gap, so that the seal ring 21 is not damaged at all. Also, the elastic force of the elastic ring 22 is not lost. Therefore, the lubrication between the pin member 14 and the bush 15 is maintained, and the progress of wear of the pin member 14 and the bush 15 is delayed, and the outer link 12 and the inner link 1
It is possible to reliably prevent dust from entering through a gap between the chain 11 and the chain 3, so that the speed and the life of the chain 11 can be increased.

In order to interpose a seal ring 21 between the outer link 12 and the end of the bush 15, the pin member 1
It is possible to increase the surface pressure of the bush 15 against the bush 4. That is, the holding groove 2 for holding the seal ring 21
7 can be opened facing the outer link 12 with the holding portion 29 sliding on the pin member 14 remaining, and only the holding portion 29 increases the surface pressure of the bush 15 against the pin member 14. For this reason, the strength of the entire chain 11 can be increased.

Further, the oil A is periodically supplied to the oil supply passage 32.
Is injected, the oil A passes through the space between the pin member 14 and the bush 15 and discharges the used oil B in the seal chamber 31 to the outside of the seal chamber 31. In other words, the pressure of the used oil B in the seal chamber 31 due to the newly supplied oil A causes the tapered portion 2
3, the used oil B pushes the contact portion 24 of the seal ring 21 away from the outer link 12 and is pushed out. Therefore, the oil can be easily changed, and the life of the chain 11 can be extended.

FIG. 3 shows the second invention.

In this chain 11, the outer link 12
A side seal structure is adopted between the bushing 15 and the bush 15, similarly to the first invention. That is, the outer link 12
A seal ring 21 is provided between the seal ring 21 and the bush 15, and an elastic ring 22 for pressing the seal ring 21 against the outer link 12 is interposed between the seal ring 21 and the bush 15.

In particular, in the second invention, the inner link 13
3 and 4, the end portion of the roller 16 and the inner portion 13a of the inner link 13 as shown in FIGS.
A rubber seal is provided between the seal ring 41 and the end of the roller 16 to press the seal ring 41 against the inner portion 13b of the inner link 13 to elastically support in the pin axis direction. An elastic ring 42 is interposed.

In this side seal structure, a configuration substantially similar to that of the first invention described above is employed. As shown in FIG. 4, a tapered portion 4 provided on a seal ring 41 is provided.
3 is a contact portion 4 that contacts the inner portion 13b of the inner link 13.
4 and the groove 4 gradually expanded inward in the radial direction.
5 is formed. A holding groove 46 for holding the elastic ring 42 is formed in the seal ring 41, and a holding groove 47 for holding the elastic ring 42 is formed at the end of the roller 16 so as to face the inner portion 13 b of the inner link 13. , Or a U-shape, and the inner groove 1 of the roller 16 is held at the end of the roller 16 by a holding groove 47 with a seal ring 41 interposed therebetween.
Holding parts 48 and 49 extending toward 3 are formed. Therefore, a seal chamber 51 for accommodating the seal ring 41 and the elastic ring 42 is formed between the roller 16 and the inner link 13.

An oil supply passage 52 is formed in the pin member 14. The oil supply passage 52 extends in the axial direction and is folded back in the radial direction so as to be located between the pin member 14 and the bush 15, and between the bush 15 and the roller 16. Between each refueling.

Therefore, the contact portion 44 of the seal ring 41 slides along the inner portion 13b of the inner link 13 to seal between the roller 16 and the inner link 13 as in the first invention. , Bush 15 and roller 1
Even if the wear of No. 6 progresses and a gap is formed between them,
Since the seal ring 41 is not damaged at all and the elastic force of the elastic ring 42 is not lost, the lubricity between the bush 15 and the roller 16 is maintained, and the wear of the bush 15 and the roller 16 progresses. And the dust can be reliably prevented from entering through the gap Z between the outer link 12 and the roller 16, so that the speed and the life of the chain 11 can be increased.

Since the seal ring 41 is interposed between the bush 15 and the roller 16, the holding groove 47 for holding the seal ring 41 is opened while the holding portion 49 extending toward the inner link 13 remains. So you can
The surface pressure of the roller 16 against the bush 15 increases, and the strength of the entire chain 11 can be increased.

Further, since new oil A is supplied from the oil supply passage 52 through the space between the bush 15 and the roller 16, the used oil C in the seal chamber 51 connects the contact portion 44 of the seal ring 41 to the inner link. 13, it is pushed out to the outside, and the oil can be changed easily.
The life of the chain 11 can be extended.

[0034]

[Effects of the Invention] In summary, according to the present invention, the following excellent effects are exhibited.

[0035] (1) According to the invention of claim 1, Rutotomoni delaying the progression of the pin member and bushing wear,
Intrusion of dust from the gap between the outer link and the inner link can be reliably prevented, and a high-speed and long-life chain can be achieved.

(2) According to the second aspect of the present invention, the progress of the wear of the bush and the roller is delayed, and the intrusion of dust from the gap between the roller and the inner link is reliably prevented. It is possible to achieve higher speed and longer life of the chain.

(3) According to the invention described in claim 3, the invention is simplified.
Oil can be changed easily, extending the life of the chain
Can be planned.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a bucket chain of the present invention.

FIG. 2 is an enlarged sectional view showing a main part of FIG.

FIG. 3 is a sectional view showing the chain of the present invention.

FIG. 4 is an enlarged sectional view showing a main part of FIG.

FIG. 5 is a diagram showing a bucket chain.

FIG. 6 is an enlarged sectional view showing a main part of FIG.

[Explanation of symbols]

 12 outer link 13 inner link 14 pin member 15 bush 16 roller 21 seal ring 22 elastic ring 41 seal ring 42 elastic ring

Continuation of the front page (56) References Japanese Utility Model Sho 53-118953 (JP, U) Japanese Utility Model Sho 53-75658 (JP, U) Japanese Utility Model Sho 55-37528 (JP, Y2)

Claims (3)

(57) [Scope of request for utility model registration] A pair of outer links connected by a pin member;
The bushing sandwiched between the outer link so as to surround the outer peripheral portion with slidably provided in the pin member, the bushing
Bearing a pair of inner link on both ends of the bucket chain formed by providing the B over La slidably so as to surround the outer periphery of <br/> bushing between the inner link, an end of the bushing
A holding groove is formed in the bush, and a pin is
Extend over the inner member of the outer link to cover the
To support the elastic ring in the holding groove and
A bucket chain comprising a seal ring interposed between a sex ring and an outer link . 2. A holding groove is formed at an end of a roller.
Cover the inner peripheral roller end with a bush and
The holding portion is formed by extending to the side, and the elastic groove is provided in the holding groove.
Support between the elastic ring and the inner link.
2. The bucket chain according to claim 1, wherein a ruling is interposed . 3. A contact surface of a seal ring in contact with an outer link.
Forming a contact part and forming a tapered part on the inner peripheral side
Between the seal ring, elastic ring and connecting pin.
And a pin member is formed in the pin member.
Form a lubrication passage for lubricating the sliding surface with the bush,
Oil is supplied from the oil supply passage to the seal chamber and the seal is
Used oil from the ring taper through the contact
3. The bucket according to claim 1, wherein the bucket is discharged.
chain.