JP2004244177A - Mast supporting device - Google Patents

Mast supporting device Download PDF

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Publication number
JP2004244177A
JP2004244177A JP2003036323A JP2003036323A JP2004244177A JP 2004244177 A JP2004244177 A JP 2004244177A JP 2003036323 A JP2003036323 A JP 2003036323A JP 2003036323 A JP2003036323 A JP 2003036323A JP 2004244177 A JP2004244177 A JP 2004244177A
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JP
Japan
Prior art keywords
grease
bush
grease groove
shape
mast
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP2003036323A
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Japanese (ja)
Inventor
Kazushige Nagamine
和茂 永峯
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Komatsu Forklift KK
Original Assignee
Komatsu Forklift KK
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Komatsu Forklift KK filed Critical Komatsu Forklift KK
Priority to JP2003036323A priority Critical patent/JP2004244177A/en
Publication of JP2004244177A publication Critical patent/JP2004244177A/en
Pending legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C17/00—Sliding-contact bearings for exclusively rotary movement
    • F16C17/12—Sliding-contact bearings for exclusively rotary movement characterised by features not related to the direction of the load
    • F16C17/24—Sliding-contact bearings for exclusively rotary movement characterised by features not related to the direction of the load with devices affected by abnormal or undesired positions, e.g. for preventing overheating, for safety
    • F16C17/246—Sliding-contact bearings for exclusively rotary movement characterised by features not related to the direction of the load with devices affected by abnormal or undesired positions, e.g. for preventing overheating, for safety related to wear, e.g. sensors for measuring wear
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/02—Parts of sliding-contact bearings
    • F16C33/04—Brasses; Bushes; Linings
    • F16C33/06—Sliding surface mainly made of metal
    • F16C33/10—Construction relative to lubrication
    • F16C33/102—Construction relative to lubrication with grease as lubricant

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Forklifts And Lifting Vehicles (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To solve a failure wherein grease can not be fed due to filling of dust and wear powder in a grease groove, dust and wear powder are difficult to be discharged to produce a lubricating defective and wear is large, in the shape of the grease groove in a conventional bush. <P>SOLUTION: In this mast supporting device, the grease groove 4 provided in the circumferential direction of an inner diameter surface 32 of the semi-circular bush 3 for supporting a mast 2 of a forklift is formed into a shape opened to an external part of a side surface at a final end part and is formed into a shape communicated from a circumference end 33 in relation to a cap 5 side for suppressing the bush 3 as necessary. <P>COPYRIGHT: (C)2004,JPO&amp;NCIPI

Description

【０００１】
【発明の属する技術分野】
フォークリフトのマスト支持装置に関するものである。
【０００２】
【従来の技術】
従来のマスト支持装置は、図１０の側面図のようにマストと車体間を、半円形のブッシュとキャップで結合しており、ブッシュのグリース溝形状には図７、図８、図９に示すもの等の他に、特許文献１に示すものもあった。
【０００３】
【特許文献１】
特開平７−８１８９５号公報
【０００４】
【発明が解決しようとする課題】
しかし上述の従来のグリース溝形状では、ダストや摩耗粉が溝につまって給脂ができなくなる他、ダストや摩耗粉が排出されにくく潤滑不良となり摩耗が大きいという不具合があった。この発明はこのような不具合を解決することを課題とした。
【０００５】
【課題を解決するための手段及び作用効果】
この発明は上述の課題に対処してなされたもので、請求項１記載の発明はフォークリフトのマストを支持する半円形のブッシュ内径面の円周方向に設けられるグリース溝を、最終端部で側面外部へ開放する形状としたことを特徴とするマスト支持装置である。
【０００６】
この構成を採用することにより、グリースの流れに方向性を持たせるよう上下非対称とし流れ方向を指定する形状となり、又ダストや摩耗粉が排出されやすいようグリース溝最終部は外部へ開放しており、給脂時の圧力によりダストや摩耗粉が容易に排出され、長期稼動後でも良好な給脂性を保持して摩耗量を少なくできる。
【０００７】
請求項２記載の発明は、請求項１記載のマスト支持装置において、半円形のブッシュを抑えるキャップ側に対してグリース溝を円周端から連通可能な形状としたことを特徴とするものとしている。
【０００８】
この構成によるグリース溝は、ブッシュの反対側のキャップに給脂が必要でグリース溝を設けたものに対しても、反対側へも連通するグリース溝とすることで、ブッシュ側からキャップ側への給脂が可能となる。
【０００９】
【発明の実施の形態】
以下この発明の実施例について図面により説明する。
図１はこの発明によるマスト支持装置のブッシュに設けられたグリース溝形状の第１実施例を示す展開平面図、図２はブッシュの側面図、図３から図６まではそれぞれブッシュに設けられたグリース溝形状の第２実施例、第３実施例、第４実施例、第５実施例を示す展開平面図である。
【００１０】
図１および図２に示した給脂穴６は、マスト２のブラケット側に取り付けられた給脂ニップル（図示せず）から連通している穴で、上部に位置するようになっており、グリース溝４が外部へ開放されているあたりが下部となっている。
【００１１】
そして給脂されたグリースの流れが、方向性を持つように上下非対称とし、流れ方向を指定する形状となっている。
またグリース溝が外部へ開放されていることで、ダストや摩耗粉が排出されやすくなり、給脂時のグリースの圧力によりダストや摩耗粉が容易に排出され、長期稼動後でも良好な給脂性を保持することとなり、摩耗量を少なくできる効果が生じる。
【００１２】
図３から図６までのグリース溝４の形状を示す第２実施例、第３実施例、第４実施例、第５実施例では、加工方法により色々な溝が選択できるので、参考に示した形状である。
図１の第１実施例のグリース溝４は開放部に向かって曲線形となっているが、図３から図６のグリース溝４は直線形となっており、負荷が小さいものに対しては、受圧面積を少なくして給脂を重点にグリース溝４を増した形になっている。
【００１３】
図４に示した第３実施例の場合は、グリース溝が円周端３３まで加工されている点が他の実施例とは異なり、別の機能を付加したものとなっている。
即ち、ブッシュ３を抑える反対側のキャップ５に給脂が必要で、グリースの流れる溝が設けられたものに対して、キャップ５側へも連通するグリース溝４とすることで、給脂されたグリースがブッシュ３側からキャップ５側へ流れて行くことが可能となっている。
【００１４】
何れにしても、マスト支持装置のブッシュ３に給脂されたグリースが、チルト操作により高い頻度で使用されても、常に潤滑機能を満たすと共に、負荷される荷重に対して摩耗量が少なくなり、長時間の耐久性能を持つことに寄与するものとなる。
【図面の簡単な説明】
【図１】この発明によるマスト支持装置のブッシュに設けられたグリース溝の第１実施例の形状を示す展開平面図である。
【図２】同じく、ブッシュの形状を示す側面図である。
【図３】グリース溝の第２実施例の形状を示す展開平面図である。
【図４】グリース溝の第３実施例の形状を示す展開平面図である。
【図５】グリース溝の第４実施例の形状を示す展開平面図である。
【図６】グリース溝の第５実施例の形状を示す展開平面図である。
【図７】従来のグリース溝形状の第１例を示す展開平面図である。
【図８】従来のグリース溝形状の第２例を示す展開平面図である。
【図９】従来のグリース溝形状の第３例を示す展開平面図である。
【図１０】マスト支持装置の分解斜視図である。
【符号の説明】
２ マスト
３ ブッシュ
３２ 内径面
３３ 円周端
４ グリース溝
５ キャップ[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a mast support device for a forklift.
[0002]
[Prior art]
The conventional mast support device connects the mast and the vehicle body with a semicircular bush and cap as shown in the side view of FIG. 10, and the grease groove shape of the bush is shown in FIG. 7, FIG. 8, and FIG. In addition to the above, there is also one disclosed in Patent Document 1.
[0003]
[Patent Document 1]
JP-A-7-81895
[Problems to be solved by the invention]
However, the above-mentioned conventional grease groove shape has a problem that dust and abrasion powder are clogged in the groove and cannot be lubricated, and that dust and abrasion powder are hardly discharged and poor lubrication results in large abrasion. An object of the present invention is to solve such a problem.
[0005]
Means for Solving the Problems and Functions and Effects
SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and the invention according to claim 1 has a grease groove provided in a circumferential direction of a semicircular bush inner diameter surface for supporting a mast of a forklift, and a side surface at a final end portion. A mast support device having a shape that opens to the outside.
[0006]
By adopting this configuration, the shape of the grease flow is made asymmetrical up and down to give directionality, and the flow direction is specified, and the grease groove final part is open to the outside so that dust and abrasion powder are easily discharged. Further, dust and abrasion powder are easily discharged by the pressure at the time of lubrication, so that even after long-term operation, good lubrication can be maintained and the amount of abrasion can be reduced.
[0007]
According to a second aspect of the present invention, in the mast support device according to the first aspect, a grease groove is formed to be able to communicate from a circumferential end with respect to a cap side for suppressing a semicircular bush. .
[0008]
The grease groove of this configuration can be used for grease from the bush side to the cap side by using a grease groove that communicates with the opposite side even if the grease groove is provided because the cap on the opposite side of the bush needs grease. Lubrication becomes possible.
[0009]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is an exploded plan view showing a first embodiment of a grease groove shape provided on a bush of a mast support device according to the present invention, FIG. 2 is a side view of the bush, and FIGS. FIG. 10 is a developed plan view showing a second embodiment, a third embodiment, a fourth embodiment, and a fifth embodiment of a grease groove shape.
[0010]
The greasing hole 6 shown in FIGS. 1 and 2 is a hole that communicates with a greasing nipple (not shown) attached to the bracket side of the mast 2 and is located at the top, and is provided with grease. The lower part where the groove 4 is open to the outside is the lower part.
[0011]
The flow of the grease supplied is vertically asymmetric so as to have directionality, and has a shape for designating the flow direction.
In addition, since the grease groove is open to the outside, dust and abrasion powder are easily discharged, and dust and abrasion powder are easily discharged by the grease pressure at the time of lubrication. As a result, the effect of reducing the amount of abrasion occurs.
[0012]
In the second embodiment, the third embodiment, the fourth embodiment, and the fifth embodiment, which show the shapes of the grease grooves 4 shown in FIGS. 3 to 6, various grooves can be selected depending on a processing method, so that they are shown for reference. Shape.
Although the grease groove 4 of the first embodiment in FIG. 1 is curved toward the open portion, the grease groove 4 in FIGS. 3 to 6 is straight, and The grease groove 4 is increased with an emphasis on lubrication by reducing the pressure receiving area.
[0013]
The third embodiment shown in FIG. 4 is different from the other embodiments in that the grease groove is machined to the circumferential end 33, and has a different function.
That is, greasing is required for the cap 5 on the opposite side that holds the bush 3 and is provided with a groove through which grease flows. By using the grease groove 4 that also communicates with the cap 5 side, lubrication is performed. Grease can flow from the bush 3 to the cap 5.
[0014]
In any case, even if the grease supplied to the bush 3 of the mast support device is used at a high frequency by the tilting operation, the grease always satisfies the lubricating function and the wear amount with respect to the applied load is reduced, This contributes to long-term durability.
[Brief description of the drawings]
FIG. 1 is a developed plan view showing a shape of a grease groove provided in a bush of a mast support device according to a first embodiment of the present invention.
FIG. 2 is a side view showing the shape of a bush.
FIG. 3 is a developed plan view showing a shape of a grease groove according to a second embodiment.
FIG. 4 is a developed plan view showing a shape of a grease groove according to a third embodiment.
FIG. 5 is a developed plan view showing a shape of a grease groove according to a fourth embodiment.
FIG. 6 is a developed plan view showing a shape of a grease groove according to a fifth embodiment.
FIG. 7 is a developed plan view showing a first example of a conventional grease groove shape.
FIG. 8 is a developed plan view showing a second example of a conventional grease groove shape.
FIG. 9 is a developed plan view showing a third example of a conventional grease groove shape.
FIG. 10 is an exploded perspective view of the mast support device.
[Explanation of symbols]
2 mast 3 bush 32 inner diameter surface 33 circumferential end 4 grease groove 5 cap

Claims (2)

フォークリフトのマスト（２）を支持する半円形のブッシュ（３）の内径面（３２）の円周方向に設けられるグリース溝（４）を、最終端部で側面外部へ開放する形状としたことを特徴とするマスト支持装置。The grease groove (4) provided in the circumferential direction of the inner diameter surface (32) of the semicircular bush (3) supporting the mast (2) of the forklift is formed so as to be open to the side surface at the final end. Characteristic mast support device. 半円形のブッシュ（３）を抑えるキャップ（５）側に対して、グリース溝（４）を円周端（３３）から連通可能な形状としたことを特徴とする請求項１記載のマスト支持装置。The mast support device according to claim 1, wherein the grease groove (4) has a shape capable of communicating with the circumferential end (33) with respect to the cap (5) that holds the semicircular bush (3). .
JP2003036323A 2003-02-14 2003-02-14 Mast supporting device Pending JP2004244177A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012052558A (en) * 2010-08-31 2012-03-15 Daido Metal Co Ltd Slide bearing for crankshaft of internal combustion engine
CN103080576A (en) * 2010-09-02 2013-05-01 菲特尔莫古威斯巴登有限公司 Dirt guide grooves in lubricated plain bearings
CN103168181A (en) * 2010-09-02 2013-06-19 菲特尔莫古威斯巴登有限公司 Structured dirt depository in sliding bearing surfaces
EP2746603A1 (en) * 2012-12-19 2014-06-25 Hitachi, Ltd. Journal bearing device
DE102018219013A1 (en) * 2018-11-08 2020-05-14 Zf Friedrichshafen Ag Plain bearings with V-shaped grooves

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012052558A (en) * 2010-08-31 2012-03-15 Daido Metal Co Ltd Slide bearing for crankshaft of internal combustion engine
CN103080576A (en) * 2010-09-02 2013-05-01 菲特尔莫古威斯巴登有限公司 Dirt guide grooves in lubricated plain bearings
CN103168181A (en) * 2010-09-02 2013-06-19 菲特尔莫古威斯巴登有限公司 Structured dirt depository in sliding bearing surfaces
US20130223777A1 (en) * 2010-09-02 2013-08-29 Federal-Mogul Wiesbaden Gmbh Dirt grooves in lubricated sliding bearings
JP2013536923A (en) * 2010-09-02 2013-09-26 フェデラル−モーグル ヴィースバーデン ゲーエムベーハー Dirt groove in lubricated sliding bearing
US8821023B2 (en) * 2010-09-02 2014-09-02 Federal-Mogul Wiesbaden Gmbh Dirt grooves in lubricated sliding bearings
CN103080576B (en) * 2010-09-02 2016-02-17 菲特尔莫古威斯巴登有限公司 Dirt groove in the sliding bearing of lubrication
US9341211B2 (en) 2010-09-02 2016-05-17 Federal-Mogul Wiesbaden Gmbh Structured dirt depository in sliding bearing surfaces
CN103168181B (en) * 2010-09-02 2016-06-22 菲特尔莫古威斯巴登有限公司 Structuring dirt storage part in sliding bearing surface
KR101803120B1 (en) * 2010-09-02 2017-11-29 페데랄-모굴 비스바덴 게엠베하 Dirt guide grooves in lubricated plain bearings
EP2746603A1 (en) * 2012-12-19 2014-06-25 Hitachi, Ltd. Journal bearing device
DE102018219013A1 (en) * 2018-11-08 2020-05-14 Zf Friedrichshafen Ag Plain bearings with V-shaped grooves

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