JP5361086B2 - Chain mechanism sprocket - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sprocket of a chain mechanism enabled in the reduction of its weight, material cost and manufacturing cost by preventing the insufficiency of rigidity depending on a place, and avoiding the waste of the material in a place in which the rigidity is sufficient. <P>SOLUTION: The sprocket of the chain mechanism comprises a plurality of divided arc-shaped members 42 which are combined in the circumferential direction and formed into the annular sprocket as a whole, and each divided arc-shaped member 42 has: an inside arc-shaped member 52 arranged inside the radial direction of the sprocket 40; an outside arc-shaped member 50 arranged outside the radial direction of the sprocket 40; two end-connecting plates 54, 56 which are connected to ends of the inside and outside arc-shaped members 52, 50 in arc-shaped directions at their ends, and formed so as to elongate in the radial direction of the sprocket 40; and width-direction center plates 58 whose peripheries are joined to width-direction centers of the inside and outside arc-shaped members 52, 50 and width-direction centers of end connecting plates 54, 56. <P>COPYRIGHT: (C)2013,JPO&amp;INPIT

Description

  The present invention relates to a sprocket having a chain mechanism that is used in, for example, a sludge scraping machine and that has a chain wound around a plurality of sprockets and drives the chain in the length direction thereof.

  In the conventional sludge scraper chain mechanism, a plate-like flight for scraping sludge is provided between a pair of chains arranged so as to face each other. By moving in the length direction of the chain together with the chain, the sludge settled in a sludge settling tank such as a sewage treatment plant or a water purification plant is scraped to a predetermined side (for example, see Patent Document 1). .

  One chain of the chain mechanism of the conventional sludge scraping machine is stretched over the outer periphery of each of the plurality of sprockets, and at least one of the plurality of sprockets is subjected to the rotational force from the drive device. The chain, driven by the drive sprocket that drives the chain, was adapted to move along its length.

  Since the sprocket used in the chain mechanism of such a conventional sludge scraper is installed and used in water, it is a driven sprocket (first conventional sprocket) integrally formed of a lightweight and corrosion-resistant synthetic resin material. (See Patent Document 2).

  However, the first conventional sprocket has a different outer shape depending on the scale of a sewage treatment plant, a water purification plant, and the like. When the outer shape of the sprocket increases, a metal for integrally molding the sprocket with a synthetic resin material is used. Since the mold also becomes large, there is a problem that it is very expensive.

  In order to solve such a problem, there has been a split type sprocket (second conventional sprocket) in which the sprocket is divided into a plurality in the circumferential direction. As conventional examples of such split-type sprockets, there are, for example, those described in Patent Document 3 and driven sprockets 2 as shown in FIG.

  In other words, as shown in FIG. 10, such a split type sprocket 2 is formed by combining four divided arc-shaped members 4 having an outer shape that is divided into four in the circumferential direction. The shape of the driven sprocket 2 was configured.

  As shown in FIG. 10, the split type driven sprocket 2 is formed in the through holes (not shown) formed at the ends of the adjacent split arc-shaped members 4 in the state where the ends in the arc-shaped direction are in contact with each other. The bolt 6 was inserted, and the nut 8 was screwed to the tip of the inserted bolt 6, whereby the arc-shaped ends of the divided arc-shaped member 4 were connected to each other.

  As described above, the arcuate ends of the divided arc-shaped members 4 adjacent to each other are connected to each other, and the four divided arc-shaped members 4 are assembled so as to be arranged in the circumferential direction. Was supposed to be formed.

Japanese Patent No. 3589162 JP 2010-276164 A JP 2002-356217 A

  However, in the driven sprocket 2 (second conventional sprocket), when the outer shape of the sprocket is large, the molded product is reduced in size by forming a split mold so that the sprocket can be formed at low cost. However, it has the following problems.

  That is, as shown in FIG. 10, the contact between the outer peripheral sliding surface 2 b of the driven sprocket 2 and the chain 12 wound around the sliding surface is partial, and between the outer peripheral sliding surface 2 b and the chain 12. The frictional force generated in the above acts only at the contact portion. For this reason, there is a problem that a large force is partially applied to the outer peripheral sliding surface 2b of the sprocket 2, the strength of the sprocket 2 near the contact portion with the chain is insufficient, and the outer peripheral portion of the sprocket 2 may be damaged. there were.

  On the other hand, since the rotation support shaft 10 is in contact with the shaft hole 2a of the sprocket 2 on the entire circumference thereof, the pressure applied to the shaft hole 2a is dispersed in the circumferential direction. There will be no problems that could cause damage.

  Accordingly, in view of the above problems, the present invention prevents the strength from being insufficient depending on the location, and eliminates waste of the material in a location where the strength is sufficient, thereby reducing the weight, material costs, and manufacturing costs. It is an object of the present invention to provide a sprocket for a chain mechanism that can be configured as described above.

In order to solve the above problems, a sprocket of a chain mechanism according to the present invention is
In the sprocket of the chain mechanism around which the chain moving in the length direction is wound,
A plurality of divided arc-shaped members having the same shape configured as a circular sprocket as a whole in combination in the circumferential direction,
The divided arc-shaped member is
An inner arc-shaped member provided radially inward of the sprocket;
An outer arcuate member provided radially outward of the sprocket;
Both end portions are connected to respective arc-shaped ends of the inner and outer arc-shaped members, and two end connecting plate portions formed to extend in the radial direction of the sprocket;
The circumferential portion has a width direction center portion of each of the inner and outer arc-shaped members, and a width direction center plate portion joined to the width direction center portion of the end connecting plate portion ,
The end connecting plate portion is characterized in that the width of the central portion in the radial direction of the sprocket is narrower than the width of both end portions in the radial direction of the sprocket .

Moreover, the sprocket of the chain mechanism according to the present invention is
The divided arc-shaped member is
The sprocket has a length in the radial direction, and both end portions in the length direction are joined in the middle of the length in the arc direction of the inner and outer arc-shaped members, and one end portion in the width direction is the central plate in the width direction. Straight ribs joined to the
The sprocket is disposed between the inner and outer arc-shaped members in the radial direction, and has a length along the arc-shaped direction of the arc-shaped members, and both end portions in the length direction are in the middle of the length of the end connecting plate portion. And one end portion in the width direction has an arc-shaped rib joined to the width direction central plate portion .

Moreover, the sprocket of the chain mechanism according to the present invention is
An opening that penetrates in the direction parallel to the axial direction of the sprocket is formed in the central plate in the width direction .

Moreover, the sprocket of the chain mechanism according to the present invention is
The end connecting plate part is characterized in that through holes used for connecting the divided arc-shaped members are formed at both ends in the radial direction of the sprocket .

According to such a sprocket of the chain mechanism of the present invention,
In the sprocket of the chain mechanism around which the chain moving in the length direction is wound,
It is provided with a split arc-shaped member that is configured in a circular sprocket as a whole by being combined in the circumferential direction.
The divided arc-shaped member is
An inner arc-shaped member provided radially inward of the sprocket;
An outer arcuate member provided radially outward of the sprocket;
Both end portions are connected to respective arc-shaped ends of the inner and outer arc-shaped members, and two end connecting plate portions formed to extend in the radial direction of the sprocket;
By having a circumferential portion having a width direction central portion of each of the inner and outer arc-shaped members and a width direction central plate portion joined to the width direction central portion of the end connecting plate portion,
It is possible to prevent the strength of the sprocket from being insufficient depending on the location of the sprocket, to reduce the material cost and the manufacturing cost by eliminating the waste of the material, and to reduce the weight of the sprocket.

It is a front view which shows the sprocket 40 for a drive which concerns on one embodiment of this invention. FIG. 2 is a side view of the driven sprocket 40 shown in FIG. 1. It is a front view of the division | segmentation arc-shaped member 42 shown in FIG. FIG. 4 is a view taken along arrow A of the divided arc-shaped member 42 shown in FIG. It is a B arrow view of the division | segmentation arc-shaped member 42 shown in FIG. It is C arrow line view of the division | segmentation arc-shaped member 42 shown in FIG. FIG. 4 is a sectional view taken along line D-D of the split arc member 42 shown in FIG. 3. FIG. 4 is a cross-sectional view taken along the line E-E of the split arc-shaped member 42 shown in FIG. 3. FIG. 5 is a cross-sectional view taken along line F-F of the divided arc-shaped member 42 shown in FIG. 3. It is a front view which shows the driven sprocket 2 around which the chain 12 of the conventional chain mechanism was wound.

EMBODIMENT OF THE INVENTION Hereinafter, the form for implementing the sprocket of the chain mechanism which concerns on this invention is demonstrated concretely based on drawing.
FIGS. 1 to 9 are views referred to for explaining a driven sprocket 40 according to an embodiment of the present invention.

  The driven sprocket 40 according to one embodiment of the present invention is integrally formed of synthetic resin, and as shown in FIGS. 1 and 3, the outer shape of one circular shape divided into four in the circumferential direction. Four divided arc-shaped members 42 having shapes are combined in the circumferential direction.

  As shown in FIG. 3, the divided arc-shaped member 42 is combined with an arc-shaped inner arc-shaped member 52 positioned on the inner peripheral side (radially inner side) of the driven sprocket 40 of FIG. An arcuate outer arc member 50 located on the outer peripheral side (radially outer side) of the sprocket 40 is provided. As shown in FIGS. 2, 4, and 5, the width direction of the inner arc member 52 and the outer arc member 50 is shown in the left-right direction in the drawing.

  The split arc-shaped member 42 has two end connecting plate portions 54 and 56. The two end connecting plate portions 54 and 56 have inner and outer arc-shaped members 52 and 56 at both ends. It is connected to each of the ends of the length in the arcuate direction of 50 and is formed so as to extend in the radial direction of the divided arcuate member 42.

  As shown in FIGS. 2, 4, and 5, the width direction of the end connecting plate portions 54 and 56 is shown in the left-right direction in the drawing.

  Further, the divided arc-shaped member 42 has a flat plate portion 58 (a central plate portion in the width direction), and the flat plate portion 58 has a peripheral portion at a central portion in the width direction of each of the inner arc-shaped member 52 and the outer arc-shaped member 50. While being joined, it is joined to the center part in the width direction of each of the end connecting plate parts 54 and 56.

  The flat plate portion 58 includes an inner flat plate portion 58a on the radially inner side of the driven sprocket 40 and an outer flat plate portion 58b on the radially outer side.

  As shown in FIGS. 3 and 4, the divided arc-shaped member 42 has an arc surface 52 a formed on the inner side of the inner arc-shaped member 52 in the radial direction. As shown in FIG. 1, when the four divided arc-shaped members 42 are combined in the circumferential direction, the circular arc surface 52a continuously forms the shaft hole 40a of the driven sprocket 40. It is supposed to be.

  The shaft hole 40a of the driven sprocket 40 has a diameter substantially the same as the diameter of the shaft hole 40a, and the rotation support shaft 10 shown in FIG. The rotation support shaft 10 is in a fixed state, and the driven sprocket 40 rotates around it. The rotation support shaft 10 may be configured to rotate together with the rotation of the driven sprocket 40.

  As shown in FIG. 4, the split arc-shaped member 42 is formed with a pair of flange-shaped guide portions 50 a at both ends in the width direction (the left-right direction in FIG. 4) of the outer arc-shaped member 50. As shown in FIG. 2, the pair of flange-shaped guide portions 50 a are connected to each other at both ends in the width direction of the driven sprocket 40 continuously in the circumferential direction when the divided arc-shaped members 42 are combined. The guide part 40b is formed.

  As shown in FIG. 4, the outer arcuate member 50 of the split arcuate member 42 has an outer sliding surface 50b formed between the pair of guide portions 50a and 50a. The outer peripheral sliding surface 50b is formed at a position recessed from the outer diameter of the guide portion 50a toward the radially inner side (lower side in the figure).

  As shown in FIG. 2, the outer peripheral sliding surface 50 b becomes the outer peripheral sliding surface 40 c of the driven sprocket 40 when the divided arc-shaped members 42 are combined in the circumferential direction and continuously in the circumferential direction. It is like that.

  The chain is wound on the outer peripheral sliding surface 40c by entering the width direction of the chain into the recess formed by the pair of guide portions 40b and the outer peripheral sliding surface 40c of the driven sprocket 40. .

  As shown in FIG. 4, the outer arc member 50 of the split arc member 42 is formed such that the cross section in the width direction extends in the left-right direction in the drawing on both sides of the outer flat plate portion 58b.

  Further, the inner arc-shaped member 52 of the divided arc-shaped member 42 is formed such that the cross section in the width direction extends in the left-right direction in the drawing on both sides of the inner flat plate portion 58a.

  As shown in FIG. 5, the end connecting plate portion 54 of the divided arc-shaped member 42 shown in FIG. 3 has a width in the left-right direction in the drawing on both sides of the flat plate portion 58. The width of the center part 54b in the middle / up / down direction is formed to be narrower than the width of the connecting part 54c at both ends in the up / down direction in the figure.

  Then, the threaded portions of the bolts 44 are loosely inserted in the direction perpendicular to the paper surface in the drawing at the portions of the end connecting plate portion 54 that are wider at both ends in the vertical direction in FIG. A connecting portion 54c provided with a through hole 54d is formed.

  The end connecting plate portion 56 of the split arc-shaped member 42 has the same configuration as the end connecting plate portion 54 as described above.

  That is, as shown in FIG. 6, the end connecting plate portion 56 of the divided arc-shaped member 42 has a width in the left-right direction in the drawing on both sides of the flat plate portion 58. The width of the direction center part 56b is formed narrower than the width of both ends in the vertical direction in the figure.

  Then, the threaded portions of the bolts 44 are loosely inserted in the direction perpendicular to the paper surface in the drawing in the portions of the end connecting plate portion 56 that are wider than the vertical center portion 56b in the vertical direction in FIG. A connecting portion 56c provided with a through-hole 56d to be formed is formed.

  As shown in FIG. 1, the driven sprocket 40 is opposed to the facing surface 54 a of the end connecting plate portion 54 of the divided arc-shaped member 42 and the end connecting plate portion 56 of another adjacent divided arc-shaped member 42. In a state where the surfaces 56a are opposed to each other, the bolts 44 are inserted into the through holes 54d and 56d (see FIGS. 5 and 6) formed in the connecting portions 54c and 56c, and the tip portions of the bolts 44 are inserted. When the nut 46 is screwed to the end connecting plate portions 54 and 56 of the split arc member 42, the end connecting plate portions 54 and 56 are connected.

  As described above, the adjacent divided arc-shaped members 42 are connected to each other, and the four divided arc-shaped members 42 are arranged in the circumferential direction, whereby one circular driven sprocket 40 is formed. .

  As shown in FIGS. 3 and 7, the split arc-shaped member 42 is disposed at a position intermediate between the outer arc-shaped member 50 and the inner arc-shaped member 52 in the radial direction, and extends along the arc-shaped direction of these arc-shaped plate portions. An arc-shaped rib 62 having a length is formed.

  The arc-shaped rib 62 is an intermediate between the outer arc-shaped member 50 and the inner arc-shaped member 52 in the radial direction so as to divide the region of the flat plate portion 58 into two regions of the inner flat plate portion 58a and the outer flat plate portion 58b. It is arranged at the position.

  Each of the arc-shaped ribs 62 is joined to both end portions in the length direction in the middle of the length of the two end connecting plate portions 54 and 56, and one end portion in the width direction is joined to the flat plate portion 58. Thus, it is formed so as to rise from the flat plate portion 58. As shown in FIG. 7, the arc-shaped ribs 62 are formed so as to rise on both the front and back surfaces of the flat plate portion 58.

  As shown in FIGS. 3 and 8, the straight straight rib 64 having a length in the radial direction is formed in the divided arc-shaped member 42. The straight rib 64 is formed in a radial direction at an intermediate position between the end connecting plate portions 54 and 56 in the circumferential direction of the divided arc-shaped member 42.

  The straight ribs 64 are joined at both ends in the length direction in the middle of the lengths of the inner and outer arc-shaped members 52, 50, and at one end in the width direction to the flat plate portion 58. By doing so, it is formed so as to rise from the flat plate portion 58. As shown in FIG. 8, the straight ribs 62 are formed so as to rise on both the front and back surfaces of the flat plate portion 58.

  As shown in FIGS. 3 and 9, the split arc member 42 of the driven sprocket 40 has a thick inner flat plate portion 58a located radially inward from the arc rib 62 (below the arc rib 62 in FIG. 9). An opening 60 penetrating in the vertical direction is formed. Further, no opening is formed in the outer flat plate portion 58b located radially outward from the arc-shaped rib 62 (above the arc-shaped rib 62 in FIG. 9).

  As described above, since the opening is not formed in the outer flat plate portion 58b positioned radially outward from the arc-shaped rib 62, the strength of the outer arc-shaped member 50 can be ensured, so that the divided arc-shaped member 42 is assembled. Even when the chain 12 comes into contact with the outer peripheral sliding surface 40c of the driven sprocket 40 and a partial force is applied, the outer arc-shaped member 50 can be prevented from being damaged.

  Further, an opening 60 is formed in the inner flat plate portion 58a located radially inward from the arc-shaped rib 62, and is added to the shaft hole 40a of the driven sprocket 40 formed by the inner arc-shaped member 52. Since the pressure is dispersed in the circumferential direction, the strength of the inner arc-shaped member 52 is sufficient, so that waste of material can be omitted, and the weight can be reduced, and the material cost and manufacturing cost can be reduced.

  As described above, according to the driven sprocket 40 according to the embodiment of the present invention, it is possible to prevent the strength from being insufficient depending on the location, and to eliminate waste of the material in a location where the strength is sufficient. The weight can be reduced, and material costs and manufacturing costs can be reduced.

  In the driven sprocket 40 according to the embodiment, four divided arc members 42 having an outer shape obtained by dividing one circular shape into four in the circumferential direction are combined. However, the divided arc-shaped members having an outer shape obtained by dividing the circular shape into two or three in the circumferential direction may be combined.

  Further, in the driven sprocket 40 according to the embodiment, the end connecting plate portions 54 and 56 of the split arc-shaped member 42 are inserted through the through holes 54d and 56d with bolts 44, and the inserted bolts 44 are inserted. The nut 46 is connected to the front end portion by screw fastening. However, as long as the nut 46 is connected to each other, the connecting means using the bolt 44 and the nut 46 is not limited.

  Further, the divided arc-shaped member 42 according to the above-described embodiment has two end connecting plate portions 54 and 56 at both ends at the middle position between the outer arc-shaped member 50 and the inner arc-shaped member 52 in the radial direction. The arc-shaped rib 62 joined to the outer arc-shaped member 50 is formed at the position near the outer arc-shaped member 50 in the radial direction. Compared with the case where it forms in this position, the intensity | strength of the outer periphery sliding surface 50b vicinity of the outer arc-shaped member 50 which contacts the chain | strand 12 may be improved.

  In addition, the divided arc-shaped member 42 in the one embodiment is configured to form the opening 60 that penetrates the flat plate portion 58a located radially inward from the arc-shaped rib 62 in the thickness direction. The number may be increased.

  In addition, if there is no problem in the strength of the vicinity of the outer peripheral sliding surface 50b of the outer arc-shaped member 50 in contact with the chain 12, an opening is formed in the flat plate portion 58b positioned radially outward from the arc-shaped rib 62 to reduce the weight. Alternatively, the material cost may be reduced.

  In the embodiment, the present invention is applied to the driven sprocket. However, the present invention may be applied to the driving sprocket.

2 driven sprocket 2a shaft hole 2b outer peripheral sliding surface 4 divided arc-shaped member 6 bolt 8 nut 10 rotation support shaft 12 chain 40 driven sprocket 40a shaft hole 40b guide portion 40c outer peripheral sliding surface 42 divided arc-shaped member 44 bolt 46 nut 50 outer arc shape Plate portion 50a Guide portion 50b Peripheral sliding surface 52 Inner arcuate plate portion 52a Arc surface 54, 56 End connection plate portion 54a, 56a Opposing surface 54b, 56b Central portion 54c, 56c Connection portion 54d, 56d Through hole 58a Inner flat plate portion 58b Outer flat plate portion 60 Opening portion 62 Arc-shaped rib 64 Straight rib

Claims (4)

In the sprocket of the chain mechanism around which the chain moving in the length direction is wound,
A plurality of divided arc-shaped members having the same shape configured as a circular sprocket as a whole in combination in the circumferential direction,
The divided arc-shaped member is
An inner arc-shaped member provided radially inward of the sprocket;
An outer arcuate member provided radially outward of the sprocket;
Both end portions are connected to respective arc-shaped ends of the inner and outer arc-shaped members, and two end connecting plate portions formed to extend in the radial direction of the sprocket;
The circumferential portion has a width direction center portion of each of the inner and outer arc-shaped members, and a width direction center plate portion joined to the width direction center portion of the end connecting plate portion ,
A sprocket for a chain mechanism, wherein the end connecting plate portion is formed such that a width of a central portion in the radial direction of the sprocket is narrower than a width of both end portions in the radial direction of the sprocket. The divided arc-shaped member is
The sprocket has a length in the radial direction, and both end portions in the length direction are joined in the middle of the length in the arc direction of the inner and outer arc-shaped members, and one end portion in the width direction is the central plate in the width direction. Straight ribs joined to the
The sprocket is disposed between the inner and outer arc-shaped members in the radial direction, and has a length along the arc-shaped direction of the arc-shaped members, and both end portions in the length direction are in the middle of the length of the end connecting plate portion. The chain mechanism sprocket according to claim 1, further comprising: an arc-shaped rib that is joined to the width direction and has one end in the width direction joined to the center plate in the width direction . The sprocket for a chain mechanism according to claim 1 or 2 , wherein an opening penetrating in a direction parallel to the axial direction of the sprocket is formed in the central plate portion in the width direction. The chain according to any one of claims 1 to 3, wherein the end connecting plate portion has through holes used for connecting the divided arc-shaped members at both ends in the radial direction of the sprocket. Mechanism sprocket.

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