JP2012163192A - Rotating body holding mechanism - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rotating body holding mechanism that can supply a lubricant remained in a holding groove to a rotating body.SOLUTION: The rotating body holding mechanism includes: a shaft member 2 fixed and held by a holding member 5, which extends in a horizontal direction; the rotating body 1 rotatably supported by the shaft member 2; a groove part 4 arranged on a lower side in a radial direction of the shaft member 2; and the lubricant 3 filled in the groove part 4 and supplied between the rotating body 1 and the shaft member 2. A rod-shaped lubricant supply member 10 is disposed in the groove part 4, which is rotatable when the rotating body 1 rotates.

Description

  The present invention relates to a rotating body holding mechanism.

  In the drive device, in order to reduce the frictional resistance between the rotating body such as a gear and the holding shaft over a long period of time, a holding groove for holding the lubricant is provided for the purpose of supplying the lubricant to the contact area between the rotating body and the bearing portion. A technique in which a lubricant is supplied from a holding groove to a rotating body as the rotating body rotates is disclosed in, for example, “Patent Document 1”.

  In the technique disclosed in “Patent Document 1”, the lubricant stored in the holding groove is not supplied to the rotating body when the lubricant and the rotating body are not in contact with each other, and the lubricant remains in the holding groove. There is a problem that it will.

  An object of the present invention is to provide a rotating body holding mechanism that solves the above-described problems and can supply the lubricant remaining in the holding groove to the rotating body.

  The invention according to claim 1 is provided on a shaft member fixed and held by a holding member and extending in a horizontal direction, a rotating body rotatably supported by the shaft member, and a lower side in a radial direction of the shaft member. In a rotating body holding mechanism having a groove portion and a lubricant filled in the groove portion and supplied between the rotating body and the shaft member, the rotating body holding mechanism is disposed in the groove portion and is rotatable when the rotating body rotates. It has a rod-like lubricant supply member.

  According to a second aspect of the present invention, in the rotating body holding mechanism according to the first aspect, the rotating body further includes a piece contact portion between the rotating member and the shaft member, and the lubricant is located at a position corresponding to the piece contact portion. It has a supply member, It is characterized by the above-mentioned.

  According to a third aspect of the present invention, in the rotating body holding mechanism according to the first or second aspect, the lubricant supply member is further rotatable forward and backward.

  According to a fourth aspect of the present invention, in the rotating body holding mechanism according to any one of the first to third aspects, the groove portion is further configured by a flat portion formed in the shaft member. .

  According to a fifth aspect of the present invention, in the rotating body holding mechanism according to any one of the first to third aspects, the groove portion is formed such that the width of the opening is smaller than the diameter of the lubricant supply member. It is characterized by being.

  According to a sixth aspect of the present invention, in the rotating body holding mechanism according to any one of the first to third aspects, the groove portion is formed in a rectangular shape in cross section, and a bottom corner portion thereof is formed in an arc shape. The arcuate corner is characterized in that the radius of the arc is greater than or equal to the radius of the lubricant supply member.

  A seventh aspect of the present invention is the rotating body holding mechanism according to any one of the first to third aspects, wherein the groove portion is formed so as not to reach a free end of the shaft member. To do.

  According to an eighth aspect of the present invention, in the rotating body holding mechanism according to any one of the first to third aspects, the groove portion is formed so as not to reach a fixed end of the shaft member. To do.

  According to a ninth aspect of the present invention, in the rotating body holding mechanism according to any one of the first to eighth aspects, the lubricant supply member is made of metal.

  According to a tenth aspect of the present invention, in the rotating body holding mechanism according to any one of the first to ninth aspects, the lubricant supply member further has a spring shape.

  According to an eleventh aspect of the present invention, in the rotating body holding mechanism according to any one of the first to tenth aspects, the rotating body is a gear.

  According to a twelfth aspect of the present invention, in the rotating body holding mechanism according to any one of the first to tenth aspects, the rotating body is a pulley.

  According to the present invention, the lubricant supply member disposed in the groove and contacting the sliding surface of the rotating body rotates intermittently or continuously with the rotation of the rotating body, and the rotation of the lubricant supplying member causes the inside of the groove to The lubricant filled in is gradually scraped out and supplied to the sliding surface of the rotating body, so that the lubricant filled in the groove can be used effectively. It is not necessary to fill, and work efficiency can be improved.

It is a principal part schematic diagram of the conventional rotary body holding | maintenance mechanism which can apply one Embodiment of this invention. It is the schematic explaining the problem of the conventional rotary body holding | maintenance mechanism. It is the schematic of the rotary body holding | maintenance mechanism used for the 1st Embodiment of this invention. It is a schematic enlarged view of the rotary body holding | maintenance mechanism used for the 1st Embodiment of this invention. It is the schematic of the rotary body holding mechanism used for the 2nd Embodiment of this invention. It is the schematic of the rotary body holding mechanism used for the 3rd Embodiment of this invention. It is the schematic of the rotary body holding mechanism used for the 4th Embodiment of this invention. It is the schematic of the rotary body holding mechanism used for the 5th Embodiment of this invention. It is the schematic of the rotary body holding mechanism used for the 6th Embodiment of this invention. It is the schematic of the rotary body holding mechanism used for the 7th Embodiment of this invention. It is the schematic which shows the example which applied the rotary body holding mechanism of this invention to the gear. It is the schematic which shows the example which applied the rotary body holding | maintenance mechanism of this invention to the pulley.

  FIG. 1 shows a rotating body holding mechanism in a driving force transmission device to which an embodiment of the present invention can be applied. In the figure, a vertically arranged holding member 5 is fixed to a non-illustrated immovable member, and a shaft 2 which is a shaft member extending in the horizontal direction is fixedly supported on the holding member 5. Above the shaft 2, the shaft 7 is fixedly supported by the holding member 5 in such a manner that it extends in the horizontal direction, and below the shaft 2, the shaft 9 is similarly fixedly supported by the holding member 5. A rotating body 1 is supported on the shaft 2, a rotating body 6 is supported on the shaft 7, and a rotating body 8 is supported on the shaft 9, so that the rotational force input from the rotating body 6 is transmitted through the rotating body 1. The rotating bodies 1, 6 and 8 are connected so as to be transmitted to the rotating body 8.

  A groove portion 4 having a rectangular cross section is formed on the shaft 2 from the fixed end to the free end of the shaft 2, and a lubricant for reducing the frictional resistance force between the shaft 2 and the rotating body 1 in the groove portion 4. 3 is filled. With this configuration, when the rotating body 1 rotates, the lubricant 3 in the groove 4 is supplied between the rotating body 1 and the shaft 2, and the frictional resistance force between the rotating body 1 and the shaft 2 is reduced.

  However, in the above-described configuration, when the rotating body 1 rotates for a predetermined period and the lubricant 3 in the groove 4 decreases, the lubricant 3 is not supplied from the groove 4 as shown in FIG. Although the frictional force between the rotating body 1 and the shaft 2 increases even though 3 remains, the function as a driving force transmission device is deteriorated, and in the worst case, it rotates with respect to the shaft 2. Body 1 is burned out. In order to prevent the occurrence of such a problem, it is necessary to fill the groove 4 with the lubricant 3 every short period, but the working efficiency is extremely deteriorated.

  In order to solve the above-described problems, the present invention employs the configuration shown in FIG. In FIG. 3, the same parts as those in FIG. 1 are given the same reference numerals, and detailed description thereof is omitted. In the first embodiment of the present invention shown in FIG. 3, the groove portion 4 is filled with a lubricant 3 and a lubricant supply member 10 is disposed. The lubricant supply member 10 made of a metal rod-like body is formed so that its diameter is smaller than the width and depth of the groove portion 4, and is arranged in the groove portion 4 so that the rotating body 1 is supported by the shaft 2. At this time, as shown in FIGS. 3 and 4, the rotating body 1 is supported so as not to fall down.

  With the above-described configuration, the lubricant supply member 10 disposed in the groove 4 and contacting the sliding surface of the rotating body 1 by its own weight rotates intermittently or continuously with the rotation of the rotating body 1, and this lubricant supplying member The lubricant 3 filled in the groove 4 is gradually scraped by the rotation of 10 and supplied to the sliding surface of the rotating body 1, thereby effectively utilizing the lubricant 3 filled in the groove 4. Therefore, it is not necessary to fill the lubricant 3 every short period, and the working efficiency can be improved.

  FIG. 5 shows a second embodiment of the present invention. Compared with the first embodiment, the second embodiment uses a holding member 11 having a stepped portion instead of the holding member 5, and replaces the rotating body 6 and the shaft 7 with the rotating body 6 and the shaft 7. The difference is that the rotating body 12 and the shaft 13 having a short length are used, and the rotating body 14 and the shaft 15 having a shorter length than the rotating body 8 and the shaft 9 are used instead of the rotating body 8 and the shaft 9. With this configuration, the rotational force input from the rotating body 12 is transmitted to the rotating body 14 via the rotating body 1, but between the rotating body 12 and the rotating body 1 and between the rotating body 1 and the rotating body 14. In this case, two contact portions indicated by reference numeral 16 in FIG. 7 are generated. Here, the lubricant supply member 10 according to the second embodiment is disposed at a position corresponding to each piece contact portion 16, that is, a length equal to or longer than the length L from the fixed end side to the free end side of each piece contact portion 16. It is formed to be L1.

  With the above-described configuration, even if there are a plurality of piece contact portions between the rotating body 1 and the shaft 2, the lubricant supply member 10 disposed at a position corresponding to each piece contact portion rotates the rotor 1. Accordingly, the lubricant 3 is supplied from the inside of the groove portion 4 between the rotating body 1 and the shaft 2, so that the lubricant 3 filled in the groove portion 4 can be used effectively, and the lubricant 3 can be used every short period. The working efficiency can be improved.

  FIG. 6 shows a third embodiment of the present invention. Compared with the first embodiment, the third embodiment forms a flat portion 17 in a part of the shaft portion 2 instead of the groove portion 4 and fills the lubricant 3 therein, and rotates with the flat portion 17. The difference is that a lubricant supply member 10 is provided between the body 1 and the sliding surface. As a result, the same operational effects as those of the first embodiment can be obtained, and the flat portion 17 can be easily processed as compared with the groove portion 4, so that the processing steps can be reduced.

  FIG. 7 shows a fourth embodiment of the present invention. Compared with the first embodiment, the fourth embodiment forms a groove portion 18 formed on the shaft 2 so that the width of the opening is smaller than the diameter of the lubricant supply member 10 instead of the groove portion 4. The difference is that the groove 3 is filled with the lubricant 3 and the lubricant supply member 10 is provided in the groove 18. As a result, the same effects as those of the first embodiment can be obtained, and the lubricant supply member 10 does not fall downward from the inside of the groove portion 18, so that the number of steps can be reduced by facilitating the assembly.

  FIG. 8 shows a fifth embodiment of the present invention. Compared with the first embodiment, the fifth embodiment is formed by forming a groove portion 19 on the shaft 2 that has a rectangular cross section instead of the groove portion 4 and is formed so that the bottom corner portion thereof has an arc shape. The difference is that the lubricant 3 is filled in the groove 19 and the lubricant supply member 10 is provided in the groove 19. Each arcuate corner of the groove 19 is formed such that the radius of each arc is equal to or greater than the radius of the lubricant supply member 10. As a result, the same effects as those of the first embodiment can be achieved, and the function of the lubricant supply member 10 to scrape the lubricant 3 out of the groove 19 can be improved as compared with the case of the groove 4.

  FIG. 9 shows a sixth embodiment of the present invention. Compared with the first embodiment, the sixth embodiment forms a groove portion 20 formed on the shaft 2 so that the end portion does not reach the free end of the shaft 2 instead of the groove portion 4. And the lubricant supply member 10 is provided in the groove 20. Thereby, while having the same effect as 1st Embodiment, it can prevent that the lubricant supply member 10 moves to an axial direction, and falls from the axis | shaft 2. FIG. This configuration can also be applied to the second to fifth embodiments described above.

  FIG. 10 shows a seventh embodiment of the present invention. Compared with the first embodiment, the seventh embodiment forms a groove portion 21 formed on the shaft 2 so that its end portion does not reach the fixed end of the shaft 2 instead of the groove portion 4. And the lubricant supply member 10 is provided in the groove 21. Thus, the same effect as that of the first embodiment is obtained, and the amount of the lubricant 3 filled in the groove portion 21 when the inner peripheral surface of the rotating body 1 on the fixed end side of the shaft 2 is not in contact with the shaft 2. Can be reduced as compared with the groove 4. This configuration is also applicable to the second to sixth embodiments described above.

  FIG. 11 shows an example in which the gear 22 is used in place of the rotating body 1, the gear 23 is used in place of the rotating body 12, and the gear 24 is used in place of the rotating body 14 in the second embodiment described above. . With this configuration, the gear 22 that meshes with the gear 23 is rotated by the rotational force input from the gear 23, and the gear 24 that meshes with the gear 22 rotates when the gear 22 rotates. During the rotation of the gear 22, the lubricant supply member 10 rotates continuously or intermittently with the rotation of the gear 22, and the lubricant 3 filled in the groove 4 is transferred to the sliding surface of the gear 22 and the shaft 2. Is supplied efficiently during.

  FIG. 12 shows an example in which the pulley 25 is used instead of the rotating body 1 and the endless belt 26 is wound around the pulley 25 in the first embodiment described above. With this configuration, the pulley 25 is rotated by the rotational force input from the endless belt 26, and during this rotation, the lubricant supply member rotates continuously or intermittently along with the rotation of the pulley 25 to fill the groove 4. The lubricant 3 is efficiently supplied between the sliding surface of the gear pulley 25 and the shaft 2.

  In each embodiment described above, the rotating direction of the rotating body 1 may be either forward rotation or reverse rotation, and the lubricant supply member 10 rotates in the same direction as the rotating body 1 according to the rotating direction of the rotating body 1. Then, the lubricant 3 is supplied. In each of the above embodiments, a metal rod-like member is shown as the lubricant supply member 10, but a spring-like member (for example, a metal compression spring or the like) may be used as the lubricant supply member. As a result, more lubricant 3 can be retained than when the lubricant supply member is rod-shaped, and the supply efficiency of the lubricant 3 can be improved.

  The rotating body holding mechanism shown in the present invention is not limited to the gears and pulleys described above, and can be applied to other rotating bodies. Various mechanisms of image forming apparatuses such as printers, copying machines, plotters, and printing apparatuses It can also be applied to parts.

1 Rotating body 2 Shaft member (shaft)
3 Lubricant 4, 18.19.20.21 Groove part 5, 11 Holding member 16 Single contact part 17 Flat part 22 Gear 25 Pulley

JP 2010-14151 A

Claims (12)

A shaft member fixed and held by a holding member and extending in the horizontal direction, a rotating body rotatably supported by the shaft member, a groove provided on the lower side in the radial direction of the shaft member, and the groove filled. In a rotating body holding mechanism having a lubricant supplied between the rotating body and the shaft member,
A rotating body holding mechanism, comprising: a rod-like lubricant supply member that is disposed in the groove and is rotatable when the rotating body is rotated. The rotating body holding mechanism according to claim 1,
The rotator has a piece contact portion with the shaft member, and has the lubricant supply member at a position corresponding to the piece contact portion. The rotating body holding mechanism according to claim 1 or 2,
The rotating body holding mechanism is characterized in that the lubricant supply member can rotate forward and backward. The rotating body holding mechanism according to any one of claims 1 to 3,
The rotating body holding mechanism according to claim 1, wherein the groove portion is constituted by a flat portion formed on the shaft member. The rotating body holding mechanism according to any one of claims 1 to 3,
The rotary member holding mechanism, wherein the groove portion is formed so that the width of the opening is smaller than the diameter of the lubricant supply member. The rotating body holding mechanism according to any one of claims 1 to 3,
The groove has a rectangular cross section and is formed such that the bottom corners are arcuate, and the arcuate corner is formed such that the radius of the arc is equal to or greater than the radius of the lubricant supply member. A rotating body holding mechanism. The rotating body holding mechanism according to any one of claims 1 to 3,
The rotating body holding mechanism, wherein the groove is formed so as not to reach a free end of the shaft member. The rotating body holding mechanism according to any one of claims 1 to 3,
The rotating body holding mechanism, wherein the groove is formed so as not to reach a fixed end of the shaft member. The rotating body holding mechanism according to any one of claims 1 to 8,
The rotating body holding mechanism, wherein the lubricant supply member is made of metal. The rotating body holding mechanism according to any one of claims 1 to 9,
The rotating body holding mechanism, wherein the lubricant supply member has a spring shape. The rotating body holding mechanism according to any one of claims 1 to 10,
The rotating body holding mechanism, wherein the rotating body is a gear. The rotating body holding mechanism according to any one of claims 1 to 10,
The rotating body holding mechanism, wherein the rotating body is a pulley.

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