JP2007100722A - Bearing structure - Google Patents

Bearing structure Download PDF

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JP2007100722A
JP2007100722A JP2005287594A JP2005287594A JP2007100722A JP 2007100722 A JP2007100722 A JP 2007100722A JP 2005287594 A JP2005287594 A JP 2005287594A JP 2005287594 A JP2005287594 A JP 2005287594A JP 2007100722 A JP2007100722 A JP 2007100722A
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grease
shaft
bearing
bearing structure
hole
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和男 ▲吉▼川
Kazuo Yoshikawa
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YOSHIKAWA JUKI KK
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YOSHIKAWA JUKI KK
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Abstract

<P>PROBLEM TO BE SOLVED: To provide bearing structure, supplying grease on the surface of a shaft without waste of grease while preventing damage of a seal part or extrusion of grease, in a grease injection work. <P>SOLUTION: The bearing structure is constituted of a shaft with grease injection hole and a bearing supporting the shaft. Grease insertion holes are perforated at both end parts of the shaft and a grease circulation groove part is carved on a contact face between the shaft and the bearing, and the groove part communicates with a grease injection hole or a grease discharge hole. The grease circulation groove part is spirally formed to a bearing inner face or a shaft outer face. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、軸受構造であって、とくにグリースの注入作業時に余分なグリースがはみ出すことがなく、また軸と軸受の間にグリース溜りを必要とせず、しかも古いグリースと新しいグリースとの入れ替えを完全に行なえる軸受構造に関するものである。   The present invention is a bearing structure, and in particular, excess grease does not protrude during the grease filling operation, and no grease reservoir is required between the shaft and the bearing, and replacement of old grease and new grease is completely possible. It is related with the bearing structure which can be performed.

従来の軸受構造は、図３に示すように端部にグリース注入用孔３１を有する円筒状のシャフト３２と、該シャフト３２を支承するブッシュ３３、とから構成され、ブッシュ３３内周面の所定位置にはグリース溜り３４が刻設され、シャフト３２の所定位置には前記グリース注入用孔３１と連通してグリース挿通孔３５が設けられグリース溜り３４にグリースを供給可能とし、さらにブッシュ３３の両端部には、グリース用シール３６が設けられグリース漏れを防止する。この構成により、グリース孔３１からグリースガン等で供給されたグリースは、グリース挿通孔３５を通してグリース溜り３４に供給され、さらにシャフト３２の回動に伴いシャフト３２外周面とブッシュ３３内周面との間に供給されてグリース膜を形成し、シャフト３２とブッシュ３３との接触面の摩擦を低減しブッシュ３３内でのシャフト３２の回動を良好とするものである。   As shown in FIG. 3, the conventional bearing structure is composed of a cylindrical shaft 32 having a grease injection hole 31 at its end and a bush 33 that supports the shaft 32. A grease reservoir 34 is engraved at the position, and a grease insertion hole 35 is provided at a predetermined position of the shaft 32 so as to communicate with the grease injection hole 31 so that grease can be supplied to the grease reservoir 34. The part is provided with a grease seal 36 to prevent grease leakage. With this configuration, the grease supplied from the grease hole 31 with a grease gun or the like is supplied to the grease reservoir 34 through the grease insertion hole 35, and further, as the shaft 32 rotates, the shaft 32 outer peripheral surface and the bush 33 inner peripheral surface The grease film is supplied between them to reduce the friction of the contact surface between the shaft 32 and the bush 33 and to make the shaft 32 rotate well in the bush 33.

しかしながら、上記従来の軸受構造の場合、シャフト３２の一端にグリースを注入するためのグリース注入用孔３１孔が形成されているが、グリースを排出するための孔は考慮されていないため、グリースを注入しても前記グリース溜り３４やグリース挿通孔３５等の内部にあるリースが完全に入れ替わることが無く、さらにシャフト３２やブッシュ３３との摩擦による摩擦粉等が混入し、グリースの潤滑効果が低下する原因となった。また、グリース溜り３４内にグリースを保持させてグリースを供給する構造となっているため、多量のグリースを必要とし、しかもグリースがグリース溜り３４内に充分に充填されずに空隙が生じシャフト３２やブッシュ３３との接触面にグリース膜ムラを発生する原因となり、異常音が出るという問題点もあった。そして、無理にグリース溜り３４内にグリースを充填しようとするとブッシュ３３の両端部に設けられたシール３６が破損し、グリースが流出するという欠点もあった。   However, in the case of the conventional bearing structure described above, the grease injection hole 31 for injecting grease is formed at one end of the shaft 32. However, since the hole for discharging grease is not considered, Even if the grease is injected, the lease inside the grease reservoir 34 and the grease insertion hole 35 is not completely replaced. Further, friction powder due to friction with the shaft 32 and the bush 33 is mixed, and the lubricating effect of the grease is lowered. It became a cause. Further, since the grease is held in the grease reservoir 34 to supply the grease, a large amount of grease is required, and the grease is not sufficiently filled in the grease reservoir 34, and a gap is generated and the shaft 32 or the like. There is also a problem in that an abnormal sound is generated because the grease film is uneven on the contact surface with the bush 33. When the grease reservoir 34 is forcibly filled with grease, the seals 36 provided at both ends of the bush 33 are damaged, and the grease flows out.

これに対し、支持体に穿設した軸孔を挿通する軸をもって回動部材を支持体に枢着し、かつ前記軸孔の内面に設けた凹部と前記軸との間に形成される空間に、グリースを注入した回動部材の枢軸部の構造において、前記凹部に、弾性変形可能な挿入部材を挿入した回動部材の枢軸部の構造が提案されている（特許文献１参照。）。   On the other hand, a rotating member is pivotally attached to the support with a shaft through which the shaft hole formed in the support is inserted, and a space formed between the recess provided on the inner surface of the shaft hole and the shaft. In the structure of the pivot portion of the rotating member into which grease has been injected, the structure of the pivot portion of the rotating member in which an elastically deformable insertion member is inserted into the recess has been proposed (see Patent Document 1).

特開２００１−８１８０７号公報JP 2001-81807 A

しかしながら、上記特許文献１に提案されている枢軸部の構造の場合、グリース溜りとなる空間に挿入部材を挿入し、グリースの使用量を減らし、軸受の摺動面にグリースを安定して供給させる構造を提供するものであるが、前記グリース溜りに弾性変形可能な部材を挿入する加工を必要とするため製造に手間が掛かり、高コストとなるという問題点があった。   However, in the case of the structure of the pivot portion proposed in Patent Document 1, an insertion member is inserted into a space where grease is accumulated, the amount of grease used is reduced, and grease is stably supplied to the sliding surface of the bearing. Although the structure is provided, there is a problem in that the process of inserting an elastically deformable member into the grease reservoir is required, so that the manufacturing is troublesome and the cost is increased.

また、軸に外部からのグリース注入孔が形成されているものの、グリース排出孔は形成されておらず、上述した従来の問題点は何ら解決できないものであった。   Further, although the grease injection hole from the outside is formed on the shaft, the grease discharge hole is not formed, and the conventional problems described above cannot be solved at all.

本発明は、上記の問題点に鑑みなされたもので、グリース注入作業時に、シールの破損やグリースのはみ出しがなく、少ないグリース量で軸と軸受との間の潤滑を良好とし、古いグリースと新しいグリースとの入れ替えを完全に行なえる軸受構造を提供することを目的とする。   The present invention has been made in view of the above-described problems, and there is no breakage of the seal or protrusion of grease at the time of grease injection, and the lubrication between the shaft and the bearing is improved with a small amount of grease. An object is to provide a bearing structure that can be completely replaced with grease.

このため本発明の軸受構造は、グリース注入口を有する軸と、該軸を支承する軸受とから構成される軸受構造において、前記軸の両端部にグリース挿通用孔が穿設されると共に前記軸と軸受との接触面にグリース循環溝部が刻設され、該溝部と前記グリース挿通用孔とが連通して構成されることを第１の特徴とする。   For this reason, the bearing structure of the present invention comprises a shaft having a grease inlet and a bearing that supports the shaft, and a grease insertion hole is formed at both ends of the shaft and the shaft The first feature is that a grease circulation groove is formed on a contact surface between the groove and the bearing, and the groove and the grease insertion hole communicate with each other.

また、前記グリース循環溝部は、前記軸受の内面に螺旋状に刻設された溝であることを第２の特徴とする。   The grease circulation groove is a groove that is spirally engraved on the inner surface of the bearing.

さらに、前記グリース循環溝部は、前記軸の外面に螺旋状に刻設された溝であることを第３の特徴とする。   Furthermore, a third feature is that the grease circulation groove is a groove formed in a spiral shape on the outer surface of the shaft.

本発明による軸受構造によれば、軸の両端部にグリース挿通用孔が穿設されており、グリース注入孔とグリース排出孔とが確保できるため、軸受構造内に注入されたグリースの入れ替えが可能となり、グリース内に混入した摩擦粉等の不純物による潤滑効果の低下を防止できると同時に無理なグリース注入によるシールの破損やグリースのはみ出しがないという優れた効果を有する。   According to the bearing structure of the present invention, the grease insertion holes are formed at both ends of the shaft, and the grease injection hole and the grease discharge hole can be secured, so that the grease injected into the bearing structure can be replaced. Thus, it is possible to prevent a reduction in the lubrication effect due to impurities such as friction powder mixed in the grease, and at the same time, it has an excellent effect that there is no breakage of the seal due to excessive grease injection and no protrusion of the grease.

また、グリース溜りを必要としたいためグリースの注入量が少なく、また前記グリース溜りに弾性変形可能な部材を挿入する加工も必要としないため安価であるという効果を有する。   In addition, since it is desired to require a grease reservoir, the amount of grease injected is small, and there is no need for processing for inserting an elastically deformable member into the grease reservoir.

さらに、螺旋状に刻設されたグリース循環溝部が形成されているため、軸と軸受の接触面に万遍なくグリースが供給されグリース膜ムラが生じることが無いという優れた効果を有する。   Further, since the grease circulation groove portion formed in a spiral shape is formed, the grease is uniformly supplied to the contact surface between the shaft and the bearing, and there is an excellent effect that the grease film does not cause unevenness.

以下、本発明の軸受構造を実施例に基づいて説明するが、本発明が本実施例に限定されないことは言うまでもない。図１は本発明の一実施例に係る軸受構造の縦断面説明図、図２は図１の軸部を示す正面図である。図３は従来の軸受構造を示す縦断面説明図である。   Hereinafter, although the bearing structure of this invention is demonstrated based on an Example, it cannot be overemphasized that this invention is not limited to a present Example. FIG. 1 is a longitudinal sectional view of a bearing structure according to an embodiment of the present invention, and FIG. 2 is a front view showing a shaft portion of FIG. FIG. 3 is a longitudinal sectional view showing a conventional bearing structure.

図１、２に示すように、本発明に係る軸受構造は、円柱状の軸部１と、軸部１を支承する円筒状の軸受部２とからなり、軸部１の両端部にはグリース注入用孔３と、グリース排出用孔４がそれぞれ穿設され、軸受部２に支承された軸部１の円柱側面部には、グリース注入用孔３及びグリース排出用孔４と連通するグリース挿通孔５が穿設されている。また、軸部１の外側面にはグリース循環溝部６が軸方向に旋回して刻設され、グリース循環溝部６の両端溝部６１は前記グリース挿通孔５と連通する構成となっている。そして、軸受部２の両端部にはシール７が設けられグリース漏れを防止する。尚、軸部１及び軸受部２には金属、プラスチック、セラミック等の材料が使用可能であり、またその複合素材であってもかまわない。また、グリース注入用孔３及びグリース排出用孔４は同じ構造であり、何れの孔からでもグリースの注入は可能である。   As shown in FIGS. 1 and 2, the bearing structure according to the present invention includes a columnar shaft portion 1 and a cylindrical bearing portion 2 that supports the shaft portion 1, and grease is provided at both ends of the shaft portion 1. The injection hole 3 and the grease discharge hole 4 are respectively formed, and the cylindrical side surface portion of the shaft portion 1 supported by the bearing portion 2 is inserted into the grease injection hole 3 and the grease discharge hole 4. A hole 5 is formed. Further, a grease circulation groove 6 is formed by turning in the axial direction on the outer surface of the shaft 1, and both end grooves 61 of the grease circulation groove 6 communicate with the grease insertion hole 5. Seals 7 are provided at both ends of the bearing portion 2 to prevent grease leakage. The shaft portion 1 and the bearing portion 2 can be made of a material such as metal, plastic, or ceramic, or may be a composite material thereof. In addition, the grease injection hole 3 and the grease discharge hole 4 have the same structure, and grease can be injected from either hole.

グリース循環溝部６は、軸部１の外側面に予め螺旋状に形成されたものであっても良く、円柱状の軸部１の外側面を旋盤等によって螺旋状に切削してもかまわない。また、グリース循環溝部６の幅、ピッチ及び深さは軸部１及び軸受部２の大きさによって適切なサイズが選択され、軸部１と軸受部２との接触面に最適なグリース膜を形成でき、しかも多量のグリースを必要としない構造とされる。   The grease circulation groove portion 6 may be formed in a spiral shape on the outer surface of the shaft portion 1 in advance, or the outer surface of the cylindrical shaft portion 1 may be cut spirally by a lathe or the like. In addition, the grease circulation groove 6 has an appropriate width, pitch, and depth selected according to the size of the shaft 1 and the bearing 2 to form an optimum grease film on the contact surface between the shaft 1 and the bearing 2. In addition, the structure does not require a large amount of grease.

この構成において、グリース（図示せず）をグリースガン等で軸部１のグリース注入用孔３から注入すると、グリースはグリース注入用孔３と連通するグリース挿通孔５を介して軸受部２の両端溝部６１に注入され、さらにグリース循環溝部６を充填しながらグリース排出用孔４と連通するグリース挿通孔５からグリース排出用孔４へ排出される。グリースの注入作業後に軸部１を回動させることにより軸部１と軸受部２との接触面にグリース循環溝部６内のグリースが供給され、グリース膜がムラ無く形成される。このグリース注入作業工程において、軸受部２はグリース溜りを有していないため多量のグリース注入を必要とせず、またグリース充填の不備による空隙も生じないため、軸部１と軸受部２との接触面に形成されるグリース膜にムラが発生せず摩擦による異常音も発生しない。そして、グリース排出用孔４から古いグリースが排出され新しいグリースとの入れ替えの完了を目視で確認できるため、グリ−スの無駄が無く最適のグリース注入量に調整ができ、従来のグリース注入量過多によるシール７の破損もなくグリースのはみ出しもない。しかも古いグリース内に混入した摩擦粉等の異物は古いグリースと同時に排出できるため軸部１と軸受部２の接触面に供給されるグリースの潤滑効果が低下することがない。   In this configuration, when grease (not shown) is injected from the grease injection hole 3 of the shaft portion 1 with a grease gun or the like, the grease is connected to both ends of the bearing portion 2 via the grease insertion holes 5 communicating with the grease injection hole 3. The grease is injected into the groove 61 and discharged from the grease insertion hole 5 communicating with the grease discharging hole 4 while filling the grease circulation groove 6 to the grease discharging hole 4. By rotating the shaft portion 1 after the grease injection operation, the grease in the grease circulation groove portion 6 is supplied to the contact surface between the shaft portion 1 and the bearing portion 2, and the grease film is formed without unevenness. In this grease injection process, the bearing portion 2 does not have a grease reservoir, so that a large amount of grease injection is not required, and there is no gap due to incomplete grease filling, so that the contact between the shaft portion 1 and the bearing portion 2 occurs. There is no unevenness in the grease film formed on the surface, and no abnormal noise due to friction is generated. Since the old grease is discharged from the grease discharge hole 4 and the completion of the replacement with the new grease can be visually confirmed, the grease can be adjusted to the optimum amount without waste of the grease. There is no breakage of the seal 7 due to the above, and no grease protrudes. Moreover, since foreign matters such as friction powder mixed in the old grease can be discharged simultaneously with the old grease, the lubricating effect of the grease supplied to the contact surface between the shaft portion 1 and the bearing portion 2 does not deteriorate.

上記実施例においては、軸部１の外側面にグリース循環溝部６が形成された軸受構造を説明しているが、軸受部２の内側面にグリース循環溝部６を軸方向に螺旋状に形成されたものであっても良く、またグリース循環溝部６は螺旋状に形成されずに軸方向に垂直に形成された溝部を連結した構造であってもかまわない。そして、この軸受構造によるグリース注入操作によれば、上述の実施例と同様の作用効果が実現できる。   In the above embodiment, the bearing structure in which the grease circulation groove 6 is formed on the outer surface of the shaft 1 has been described. However, the grease circulation groove 6 is formed in a spiral shape in the axial direction on the inner surface of the bearing 2. The grease circulation groove 6 may be a structure in which grooves formed perpendicular to the axial direction are connected instead of being formed in a spiral shape. And according to the grease injection operation by this bearing structure, the same effect as the above-mentioned Example is realizable.

以上の構成からなる本発明の軸受構造によれば、軸の両端部にグリース挿通用孔が穿設されており、グリース注入孔とグリース排出孔とが確保できるため、軸受構造内に注入されたグリースの入れ替えが可能となり、グリース内に混入した摩擦粉等の不純物による潤滑効果の低下を防止できると同時に無理なグリース注入によるシールの破損やグリースのはみ出しがない、しかもグリース溜りを必要としたいためグリースの注入量が少なく、また前記グリース溜りに弾性変形可能な部材を挿入する加工も必要としないため安価である。   According to the bearing structure of the present invention having the above-described structure, the grease insertion holes are formed at both ends of the shaft, and the grease injection hole and the grease discharge hole can be secured, so that the grease is injected into the bearing structure. Because it is possible to replace the grease and prevent deterioration of the lubrication effect due to impurities such as friction powder mixed in the grease, there is no excessive damage to the seal due to excessive grease injection, and there is a need for a grease reservoir It is inexpensive because the amount of grease injected is small, and it is not necessary to insert an elastically deformable member into the grease reservoir.

さらに、螺旋状に刻設されたグリース循環溝部が形成されているため、軸と軸受の接触面に万遍なくグリースが供給されグリース膜ムラが生じることが無い。   Further, since the grease circulation groove portion formed in a spiral shape is formed, the grease is uniformly supplied to the contact surface between the shaft and the bearing, and the grease film does not cause unevenness.

本発明による軸受構造によれば、工作機械や土木建設機械などの軸受構造においてグリースを頻繁に供給する必要のあるものや、軸と軸受とで摩擦による磨耗が起こりやすいものにおいて好適に使用できる。   According to the bearing structure of the present invention, it can be suitably used in a bearing structure such as a machine tool or a civil engineering machine that requires frequent supply of grease, or in which friction due to friction between the shaft and the bearing easily occurs.

本発明の一実施例に係る軸受構造の縦断面説明図である。It is a longitudinal cross-sectional explanatory drawing of the bearing structure which concerns on one Example of this invention. 図１の軸部を示す正面図である。It is a front view which shows the axial part of FIG. 従来の軸受構造を示す縦断面説明図である。It is longitudinal cross-sectional explanatory drawing which shows the conventional bearing structure.

符号の説明Explanation of symbols

１ 軸部
２ 軸受部
３、３１ グリース注入用孔
４ グリース排出用孔
５、３５ グリース挿通孔
６ グリース循環溝部
７、３６ シール
３２ シャフト
３３ ブッシュ
３４ グリース溜り
６１ 両端溝部 DESCRIPTION OF SYMBOLS 1 Shaft part 2 Bearing part 3, 31 Grease injection hole 4 Grease discharge hole 5, 35 Grease insertion hole 6 Grease circulation groove part 7, 36 Seal 32 Shaft 33 Bush 34 Grease reservoir 61 Both end groove part

Claims (3)

グリース注入口を有する軸と、該軸を支承する軸受とから構成される軸受構造において、前記軸の両端部にグリース挿通用孔が穿設されると共に前記軸と軸受との接触面にグリース循環溝部が刻設され、該溝部と前記グリース挿通用孔とが連通して構成されることを特徴とする軸受構造。   In a bearing structure comprising a shaft having a grease inlet and a bearing for supporting the shaft, grease insertion holes are formed at both ends of the shaft and grease is circulated on the contact surface between the shaft and the bearing. A bearing structure characterized in that a groove is formed and the groove and the grease insertion hole communicate with each other. 前記グリース循環溝部は、前記軸受の内面に螺旋状に刻設された溝であることを特徴とする請求項１記載の軸受構造。   The bearing structure according to claim 1, wherein the grease circulation groove is a groove formed in a spiral shape on an inner surface of the bearing. 前記グリース循環溝部は、前記軸の外面に螺旋状に刻設された溝であることを特徴とする請求項１記載の軸受構造。   The bearing structure according to claim 1, wherein the grease circulation groove is a groove formed in a spiral shape on an outer surface of the shaft.
JP2005287594A 2005-09-30 2005-09-30 Bearing structure Pending JP2007100722A (en)

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010061976A1 (en) * 2008-11-27 2010-06-03 株式会社タカノ Sliding pin and manufacturing method therefor
WO2011070621A1 (en) * 2009-12-10 2011-06-16 株式会社日立製作所 Slide bearing device and compressor
JP2015120122A (en) * 2013-12-24 2015-07-02 三菱日立パワーシステムズ株式会社 Roller bearing device and vertical mill
JP2015127570A (en) * 2013-12-27 2015-07-09 三菱重工業株式会社 Bearing device and grinding device
KR20150091489A (en) * 2012-12-13 2015-08-11 에이치.이.에프. Guiding body in the form of a ring for friction mounting, with an articulating and/or element-sliding capacity
JP2016077938A (en) * 2014-10-10 2016-05-16 三菱日立パワーシステムズ株式会社 Pulverizer and lubrication oil substitution method for bearing of pulverizer
JP2016077939A (en) * 2014-10-10 2016-05-16 三菱日立パワーシステムズ株式会社 Pulverization device and bearing part adjustment method of pulverization device

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Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010061976A1 (en) * 2008-11-27 2010-06-03 株式会社タカノ Sliding pin and manufacturing method therefor
JP5544300B2 (en) * 2008-11-27 2014-07-09 株式会社タカノ Sliding pin and manufacturing method thereof
WO2011070621A1 (en) * 2009-12-10 2011-06-16 株式会社日立製作所 Slide bearing device and compressor
JP5502108B2 (en) * 2009-12-10 2014-05-28 株式会社日立製作所 Slide bearing device and compressor
US9255606B2 (en) 2009-12-10 2016-02-09 Hitachi, Ltd. Slide bearing device and compressor
KR20150091489A (en) * 2012-12-13 2015-08-11 에이치.이.에프. Guiding body in the form of a ring for friction mounting, with an articulating and/or element-sliding capacity
JP2016500429A (en) * 2012-12-13 2016-01-12 アッシュ・ウー・エフ Guide body in the form of a ring having a joint function and / or an element sliding function for friction fitting
EP2932110B1 (en) 2012-12-13 2019-02-06 H.E.F. Guiding body in the form of a ring for friction mounting, with an articulating and/or element-sliding capacity
KR102088229B1 (en) * 2012-12-13 2020-03-12 에이치.이.에프. Guiding body in the form of a ring for friction mounting, with an articulating and/or element-sliding capacity
JP2015120122A (en) * 2013-12-24 2015-07-02 三菱日立パワーシステムズ株式会社 Roller bearing device and vertical mill
JP2015127570A (en) * 2013-12-27 2015-07-09 三菱重工業株式会社 Bearing device and grinding device
JP2016077938A (en) * 2014-10-10 2016-05-16 三菱日立パワーシステムズ株式会社 Pulverizer and lubrication oil substitution method for bearing of pulverizer
JP2016077939A (en) * 2014-10-10 2016-05-16 三菱日立パワーシステムズ株式会社 Pulverization device and bearing part adjustment method of pulverization device

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