JP3216262U - Sealing means for bucket elevator chain - Google Patents

Abstract

The present invention provides a bucket elevator chain sealing means that is not damaged by an impact generated during a cargo handling operation and extends the life of the bucket elevator chain. A sealing means includes a ring-shaped outer shape, a surface contact portion that makes surface contact with an outer link plate, an elastic member contact portion that is formed in a plane on a surface facing the surface contact portion, and an elastic member. A surface that is in surface contact with the first seal member 100 composed of the reinforcing portion 150 that is formed thick by a step formed on the outside of the member contact portion 130 and the other inner link plate 40 that faces the first seal member 100. A second seal member 200 including a contact portion 210, an elastic member fixing portion 250 having a step formed on an inner periphery thereof spaced apart from the elastic member contact portion 230 facing the surface contact portion 210, and a first seal member 100 elastic member contact portions 130 and an elastic member 300 provided between the elastic member support portions 233 of the second seal member 200. [Selection] Figure 2

Description

  The present invention relates to a sealing means for a bucket elevator chain.

  In general, various chains are known for a chain provided in a bucket for carrying iron ore, coal, salt, grain or the like.

  For example, as shown in FIG. 1a, the “chain structure” disclosed in Japanese Patent Publication No. 2000-136848 is a typical example, and the contents thereof are as follows.

  Referring to the figure, a conventional chain CN includes inner and outer link plates IP and OP, and pins PN coupled to repeatedly connect the ends of the inner and outer link plates IP and OP to each other. A bush BS provided on the outer periphery of the pin PN so as to be rotatable on an inner length portion of the outer link plate OP, and an inner length of the inner link plate IP provided on the outer periphery of the bush BS. It is composed of a ruler RR provided so that it can rotate in contact with a sprocket (not shown).

Further, a sealing means SM is provided between the inner and outer link plates IP, OP in order to prevent particles such as iron ore and coal from the outside from entering.
The conventional sealing means SM includes an outer seal ring OR, an inner seal ring IR, first and second elastic members OR1, OR2, and a V ring VR.

  The outer seal ring OR is in contact with the outer link plate OP on one side and the concave groove on the other side to prevent foreign particles from entering the gap between the outer link plates OP. An FH is formed, and a first elastic member OR1 that is a normal O-ring is provided in the fixing groove FH.

  The first elastic member OR1 comes into contact with the inner link plate IP due to its elasticity and is sealed.

  On the inner peripheral surface of the outer seal ring OR, that is, on the lower side with respect to the illustrated direction, an inclined portion OTP is formed in a direction parallel to the inclined portion ITP formed in the inner seal ring IR described later.

  On the other hand, the inner seal ring IR is formed with an outer diameter smaller than that of the outer seal ring OR, and is arranged in a cross-direction symmetric shape on the lower side with respect to the illustrated direction, and one side surface contacts the inner link plate IP. .

  The outer periphery of the inner seal ring IR, that is, the upper stage with reference to the illustrated direction, is formed with an inclined portion ITP in a direction parallel to the inclined portion OTP formed in the outer seal ring OR, and is an ordinary O-ring in between. A second elastic member OR2 is disposed, and a V-ring VR is disposed on the other surface of the inner seal ring IR to prevent entry of foreign matter from the outside.

  On the other hand, a shaft hole SH is formed in the pin PN in the length direction on the center line, and a connecting passage WY is formed in a direction perpendicular to the shaft hole SH.

  The connecting passage WY is connected to an oil filling space EM formed by a concave groove on the outer periphery of the pin PN, and is filled with grease injected at a predetermined pressure and lubricated.

  However, the outer seal ring OR has accumulated fatigue due to impacts generated during loading or unloading work of iron ore or coal, etc., because the end portion ("C" display part) that is in surface contact with the outer link plate OP becomes a substantially right angle type. It has a fatal problem that it becomes brittle due to the stress concentration accompanying the crack.

  Also, as shown in FIGS. 1b and 1c, the friction of the coal or iron ore being transported causes wear of the outer link plate OP and the outer seal ring OR in the portion indicated by the two-dot chain line, and the outer seal ring There is also a fatal problem that the sealing function is lost when the OR and the first elastic member OR1 are damaged.

  Further, the shaft hole SH formed in the pin and the connecting passage WY are formed in a right angle direction, and a large pressure is applied during the grease injection, so that the injection is difficult and the lubrication action does not work smoothly.

  As described above, the present invention has been devised to solve the conventional problems, and an object of the present invention is to provide a sealing means that is not damaged by an impact generated during a cargo handling operation such as iron ore or coal. That is.

  Another object of the present invention is to extend the life of the bucket elevator chain by improving the strength of the sealing means as described above.

  Yet another object of the present invention is to provide a pin structure that allows easy grease injection and to maximize the lubrication action.

  The present invention made for such a purpose includes a pin provided with a grease injection means, a bush coupled to the outer periphery in the longitudinal direction of the pin, and a roller coupled so as to be easily rotatable outside the bush. And an inner link plate arranged at a predetermined distance on both ends of the roller, and an outer link plate coupled to the outer side of the inner link plate, and a bucket elevator provided with a sealing means between the inner link plate and the outer link plate. The sealing means includes a ring-shaped outer shape, a surface contact portion that makes surface contact with the outer link plate, an elastic member contact portion that is formed in a plane on a surface that faces the surface contact portion, and the elasticity A first seal member composed of a reinforcing portion formed thick by a step formed outside the member contact portion; and A surface contact portion that is in surface contact with the other inner link plate, and an elastic member fixing portion that is formed with a step on an inner periphery at a predetermined distance from the elastic member contact portion that faces the surface contact portion. A second seal member; and an elastic member provided between the elastic member contact portion of the first seal member and the elastic member support portion of the second seal member.

  The first seal member further includes a round portion formed at an outer end portion of the reinforcing portion.

  The first seal member further includes an elastic member support portion formed at an intersection of the step and the elastic member contact portion.

  The second seal member further includes an elastic member support portion formed at an intersection between the step and the elastic member fixing portion.

Further, the elastic member support portions formed on the first and second seal members are formed with the same radius as the outer diameter of the elastic member.

In addition, the elastic member includes a ring-shaped inner and outer members, the first and second members being disposed at a predetermined distance, and an intermediate portion is provided to maintain the distance between the first and second members and increase the strength. A connection part is further provided.

  The elastic member fixing portion of the second seal member further includes an elastic member seating portion formed by an arcuate groove so that the first and second members are seated.

  In addition, the sealing means further includes a foreign substance intrusion prevention retainer provided on both inner peripheries of the bush.

  Further, the grease injection means for the pin further includes an inclined oil supply hole formed obliquely so as to directly communicate with an oil supply space formed on the outer periphery of the pin.

  As described in detail above, according to the bucket elevator chain of the present invention, it is possible to provide a strong sealing means that is not damaged by an impact generated during cargo handling work such as iron ore or coal.

  Further, by improving the strength of the sealing means, there is an effect of extending the life of the bucket elevator chain almost semipermanently.

  In addition, the supply port through which grease is injected into the pins connecting the inner and outer link plates is formed in an inclined shape to facilitate the injection of grease, thereby maximizing the lubricating action through the pins.

It is drawing which showed the conventional chain structure. It is a drawing showing a damaged part of a conventional chain. It is the reference photograph which showed the damaged part of the conventional chain. 1 is a partial view of a bucket elevator chain according to the present invention. FIG. 3 is an enlarged view of a portion “A” in FIG. 2. 1 is a view illustrating a state in which a bucket elevator chain provided with a sealing means according to the present invention is coupled. It is the reference photograph which showed a mode that the chain for bucket elevators provided with the sealing means by this invention was operated by the bucket elevator.

  As shown in FIG. 2 and FIG. 3, the bucket elevator chain 1 according to the present invention includes a pin 10 having a grease injection means 11, a bush 20 axially coupled to the outer periphery in the length direction of the pin 10, and the bush 20 The inner and outer link plates are basically composed of a roller 30 coupled so as to rotate easily on the outer side, and inner and outer link plates 40, 50 disposed at both ends of the roller 30 at a predetermined distance. 40 and 50 are the basic components, and include sealing means 60 between the inner and outer link plates 40 and 50 and the outer link plate.

  Hereinafter, in the above configuration, the configuration of the pin 10 excluding the grease injecting means 11 and the sealing means 60 is the same as that of the prior art, and thus a separate description is omitted.

  As shown in the figure, the bucket elevator chain sealing means 60 (hereinafter referred to as “sealing means”) according to the present invention is roughly divided into a first seal member 100, a second seal member 200, and an elastic member 300.

  The first seal member 100 includes a surface contact part 110, an elastic member contact part 130, and a reinforcing part 150.

  The surface contact portion 110 has a ring-shaped outer shape having a predetermined width, and is a planar portion that makes surface contact with the outer link plate 50.

  The reinforcing portion 150 is a thick portion extending outside the surface contact portion 110 and the elastic member contact portion 130, and a round portion 151 is formed at the end thereof.

  The reason why the round portion 151 is formed in this way is to prevent stress concentration that acts on the end portion of the first seal member 100 when the chain is operated by the action described later.

  Here, the stress concentration will be briefly described.

  Stress concentration is when a machine component has notches, holes, screws, steps, protrusions, etc., when the load is applied, the stress distribution state becomes irregular in the cross section, and partially high stress Refers to a phenomenon that causes concentration.

That is, by forming the round portion 151 at the end portion of the first seal member 100 as described above, it is possible to prevent cracks and breakage due to stress concentration.

The larger the round part 151, the better. However, it is desirable to form the round part 151 with a size l1 that is 1/2 or more of the entire thickness of the reinforcing part 150 ("L" display part). It is desirable to form the round part 151 to prevent concentration.

  On the other hand, an elastic member support portion 153 is also formed at the intersection where the elastic member contact portion 130 and the step 140 are formed so as to avoid stress concentration and to enable stable support of the elastic means 300 described later.

  The length of the reinforcing part 150 ("LG" display part) can be maximized by forming it as long as possible without protruding outside the outer link plate 50.

  The second seal member 200 is disposed on the other surface facing the first seal member 100 having such a configuration. The second seal member 200 is fixed to the surface contact portion 210, the elastic member contact portion 230, and the elastic member. Part 250.

  The surface contact portion 210 is formed in the same plane as the first seal member 100, and the elastic member contact portion 230 is arranged in a plane on the other surface opposite to the surface contact portion 210 as in the first seal member 100. Is done.

  In addition, an elastic member fixing portion 250 formed thick by a step 231 is provided on the inner periphery of the elastic member contact portion 230, that is, on the inner side in the illustrated direction.

  An elastic member support portion 233 is formed at an intersection where the elastic member contact portion 230 and the step 231 are formed so as to avoid stress concentration and to enable stable support of the elastic means 300 described later.

  Accordingly, the elastic member support portions 153 and 233 formed at the step 140 of the first seal member 100 and the step 231 of the second seal member 200 prevent the elastic member 300 described later from being detached.

  On the other hand, as described above, the elastic member support portions 153 and 233 formed on the first seal member 100 and the second seal member 200, respectively, are preferably formed with the same radius R as the outer diameter of the elastic member 300.

  As described above, the elastic member 300 is disposed between the elastic member support portion 153 of the first seal member 100 and the elastic member support portion 233 of the second seal member 200.

  The elastic member 300 is a rubber product having a predetermined elasticity, and the first and second members 310 and 330 are disposed at a predetermined distance on the inner side and the outer side formed by a ring shape, and the first and second members In order to maintain the distance between 310 and 330 and increase the strength, a belt-shaped connecting portion 350 is disposed in the middle portion.

  As described above, the elastic member 300 formed in a ring shape does not generate a flow inside and outside due to the elastic member support portion 153 of the first seal member 100 and the elastic member support portion 233 of the second seal member 200. .

  On the other hand, there is no problem even if the elastic member contact portion 230 of the second seal member 200 is formed as a plane as described above, and the first and second members 310 and 330 of the elastic member 300 are seated as shown in FIG. Needless to say, the intended object of the present invention can be achieved even if the elastic member seating portion 235 is formed by the arc-shaped concave groove.

  On the other hand, the bucket elevator chain 1 according to the present invention further includes a retainer 400 provided on the inner periphery of both ends of the bush 20 to prevent foreign matter from entering.

  The retainer 400 is formed by injecting a synthetic resin to form a cross-section in a “U” shape, and a reinforcing member 401 made of a metal material is provided therein.

  A flange 403 is disposed on the inner diameter side in contact with the pin 10 with the illustrated direction as a reference. The flange 403 has a structure that allows grease to pass through the lubrication space 12 formed on the outer periphery of the pin 10 when grease is injected, but prevents foreign matters including grease from entering the opposite side, that is, the lubrication space 12. .

  Therefore, the first seal member 100 according to the present invention prevents the entry of foreign matter from the outside, and the retainer 400 can prevent the foreign matter from entering twice.

  2, the grease injection means 11 of the pin 10 according to the present invention further includes an inclined oil supply hole 11a formed obliquely so as to directly communicate with the oil supply space 12 formed on the outer periphery of the pin 10.

  2 to 4, the effect of the sealing means for the bucket elevator chain according to the present invention will be described.

  First, when grease is injected through the grease nipple of the grease injection means 11 provided in the pin 10, the grease injected from the inclined oil supply hole 11a fills the oil supply hole 12 at a high speed.

  When the grease filled in this way acts at a predetermined pressure or higher, it is discharged through the flange 401 of the retainer 400 and fills the space of the sealing means 60, and the first seal member 100 not only has elasticity of the elastic member 300 but also grease. Since it is configured to be in close contact with the outer link plate 50 even under pressure, foreign matter intrusion from the outside is prevented in advance.

  Further, the thickened reinforcing portion 150 of the first seal member 100 can provide a sealing means 60 having high strength so as not to be damaged by an impact generated during cargo handling work such as iron ore or coal. By improving the strength of 60, the life of the bucket elevator chain 1 was almost semi-permanently extended.

  In addition, an inclined lubrication hole 11a through which grease is injected into the pin 10 connecting the inner and outer link plates 40, 50 is formed in the inclined direction, facilitating the grease injection, thereby providing a lubricating action through the pin 10. Maximized.

  Further, by disposing the retainer 400 between the pin 10 and the bush 20, it is possible to prevent foreign substances from entering from the outside together with the first seal member 100 while facilitating the grease injection inside. did.

  FIG. 5 is a reference drawing showing an embodiment in which the chain 1 according to the present invention is applied to a bucket elevator, and the chain according to the present invention is applied not only to a bucket elevator but also to a cargo transporting conveyor (Conveyor) as illustrated. Of course, the intended purpose of the present invention can be achieved.

  The present invention is not limited to the specific preferred embodiments described above, and may be used by any person having ordinary knowledge in the technical field to which the present invention belongs without departing from the spirit of the present invention claimed in the claims. Of course, various modifications can be made, and such modifications are within the scope of the claims of the present invention.

1: Chain for bucket elevator
10: Pin
11: Grease injection method
11a: Inclined lubrication hole
20: Bush
30: Roller
40: Inner link plate
50: Outer link plate
60: Sealing means
100: First seal member
110: Surface contact area
130: Elastic member contact area
150: Reinforcement
151: Round part
153,233: Elastic member support
200: Second seal member
210: Surface contact area
230: Elastic member contact area
231: Level difference
235: Elastic member seat
250: Elastic member fixing part
300: Elastic member
310,330: First and second members
350: Connecting part
400: Retainer

Claims (8)

A pin provided with grease injection means, a bush axially coupled to the outer periphery in the lengthwise direction of the pin, a roller coupled so as to be easily rotatable outside the bush, and a predetermined distance between both ends of the roller. In the bucket elevator chain, the outer link plate is coupled to both ends of the outer link pin of the inner link plate, and the outer link plate is provided with a sealing means between the inner link plate and the outer link plate.
The sealing means includes
A ring-shaped outer shape, a surface contact portion that makes surface contact with the outer link plate, an elastic member contact portion formed in a plane on the other surface facing the surface contact portion, and an outer side of the elastic member contact portion A first seal member composed of a reinforcing portion formed with a constant thickness by the formed step;
A surface contact portion in surface contact with the other inner link plate facing the first seal member, an elastic member contact portion formed in a plane on a surface facing the surface contact portion, and the elastic member contact portion. A second seal member composed of an elastic member fixing portion formed with a constant thickness by a step on the inner periphery;
A bucket elevator chain sealing means, comprising: an elastic member contact portion of the first seal member; and an elastic member disposed between the elastic member contact portions of the second seal member.   2. The bucket elevator chain sealing means according to claim 1, wherein the first seal member further includes a round portion formed at an outer end portion of the reinforcing portion. The first seal member further includes an elastic member support portion formed at an intersection of the step and the elastic member contact portion,
2. The bucket elevator chain sealing means according to claim 1, wherein the elastic member support portion formed on the first seal member has the same diameter as that of the first member of the elastic means. The second seal member further includes an elastic member support portion formed at an intersection of the step and the elastic member contact portion,
2. The bucket elevator chain sealing means according to claim 1, wherein the elastic member support portion formed on the second seal member has the same diameter as the second member of the elastic means. The elastic member has first and second members arranged at a predetermined distance on the inside and outside formed in a ring shape,
2. The bucket elevator chain sealing means according to claim 1, further comprising a connecting portion at an intermediate portion for maintaining the distance between the first and second members and increasing the strength.   2. The bucket elevator chain according to claim 1, wherein the elastic member contact portion of the second seal member further includes an elastic member seat portion formed of an arc-shaped concave groove so that the first and second members are seated. Sealing means.   2. The bucket elevator chain sealing means according to claim 1, wherein the bucket elevator chain further includes a foreign substance inflow prevention retainer provided at inner ends (inner diameters) of both ends of the bush.   2. The bucket elevator chain sealing means according to claim 1, wherein the pin grease injection means further includes an inclined oil supply hole formed obliquely so as to directly communicate with an oil supply space formed on an outer periphery of the pin.

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