JPH053772Y2 - - Google Patents
Info
- Publication number
- JPH053772Y2 JPH053772Y2 JP1988092901U JP9290188U JPH053772Y2 JP H053772 Y2 JPH053772 Y2 JP H053772Y2 JP 1988092901 U JP1988092901 U JP 1988092901U JP 9290188 U JP9290188 U JP 9290188U JP H053772 Y2 JPH053772 Y2 JP H053772Y2
- Authority
- JP
- Japan
- Prior art keywords
- pin
- retainer
- bracket member
- bracket
- boss
- 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.)
- Expired - Lifetime
Links
- 238000007789 sealing Methods 0.000 claims description 16
- 238000003780 insertion Methods 0.000 claims description 12
- 230000037431 insertion Effects 0.000 claims description 12
- 230000002093 peripheral effect Effects 0.000 claims 2
- 239000004519 grease Substances 0.000 description 21
- 230000008878 coupling Effects 0.000 description 4
- 238000010168 coupling process Methods 0.000 description 4
- 238000005859 coupling reaction Methods 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000004576 sand Substances 0.000 description 3
- 239000000428 dust Substances 0.000 description 2
- 230000001050 lubricating effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
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
- F16C11/00—Pivots; Pivotal connections
- F16C11/04—Pivotal connections
- F16C11/045—Pivotal connections with at least a pair of arms pivoting relatively to at least one other arm, all arms being mounted on one pin
-
- 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
- F16C2350/00—Machines or articles related to building
- F16C2350/26—Excavators
Landscapes
- Component Parts Of Construction Machinery (AREA)
- Sealing Devices (AREA)
- Pivots And Pivotal Connections (AREA)
Description
【考案の詳細な説明】
産業上の利用分野
この考案は、主として建設機械用ピン結合部の
シール構造に関する。[Detailed Description of the Invention] Industrial Application Field This invention mainly relates to a seal structure for a pin joint for construction machinery.
従来の技術
第４図は、建設機械のうち油圧シヨベルの側面
図である。図において、１は油圧シヨベルの下部
走行体、２は上部旋回体、３は上部旋回体２のフ
ロント部に装着した作業アタツチメント、４は作
業アタツチメント３のブーム、５はアーム、６は
バケツト、７は一個のピン結合部である。第５図
は、第４図のＡ−Ａより見たピン結合部７の断面
図である。図において、８はブラケツト部材、９
はボス部材、１０はボス部材９の左右端部に圧入
嵌着したつぼ付ブツシユ、１１はつぼ付ブツシユ
１０に嵌着したダストシール、１２はピン、１３
はピン１２固定用リング部材、１４はボス部材９
の外部側に設けた給脂口、１５はブラケツト部材
８・ボス部材９の２部材対接面外周部に取付けて
いる土砂侵入防止用のＯリングである。BACKGROUND ART FIG. 4 is a side view of a hydraulic excavator among construction machines. In the figure, 1 is the lower traveling body of the hydraulic excavator, 2 is the upper revolving body, 3 is the work attachment attached to the front part of the upper revolving body 2, 4 is the boom of the work attachment 3, 5 is the arm, 6 is the bucket, and 7 is one pin joint. FIG. 5 is a sectional view of the pin coupling portion 7 taken along line A-A in FIG. 4. In the figure, 8 is a bracket member, 9
10 is a boss member, 10 is a bush with a pot that is press-fitted to the left and right ends of the boss member 9, 11 is a dust seal that is fitted to the bush with a pot 10, 12 is a pin, 13
14 is a ring member for fixing the pin 12, and 14 is a boss member 9.
The greasing port 15 provided on the outside is an O-ring attached to the outer periphery of the contact surface of the bracket member 8 and boss member 9 to prevent dirt from entering.
次に、従来技術ピン結合部７の構成を第５図に
ついて述べる。ブラケツト部材８にボス部材９が
ピン１２を介して連結され、かつそのピン１２に
対して上記ボス部材９が回動自在に結合されてい
る。それで、ピン結合部７の潤滑は、グリースを
給脂口１４よりグリース溜め室１６に供給するこ
とにより行われる。 Next, the configuration of the conventional pin coupling section 7 will be described with reference to FIG. A boss member 9 is connected to the bracket member 8 via a pin 12, and the boss member 9 is rotatably connected to the pin 12. Therefore, the pin joint portion 7 is lubricated by supplying grease to the grease reservoir chamber 16 from the greasing port 14.
考案が解決しようとする課題
ピン結合部には、組立上、製作加工上の理由に
よりブラケツト部材・ボス部材の２部材対接面間
に隙間が存在する。ピン結合部に給脂口より給脂
しているときに、グリース溜め室充満後の過剰供
給グリースが上記隙間を通り、２部材対接面外周
部のＯリングを押し上げ外部へ溢出し、また一部
はブラケツト部材のピン挿嵌穴の方から外部へ溢
出する。また、油圧シヨベルの作業中には上記２
部材間の隙間存在によりボス部材がピン軸心方向
にがたつき移動をするので、上記Ｏリングのシー
ル効果は非常に小さい。そのために土砂などが上
記隙間に侵入したり、給脂したグリースが逆に溢
出する。上記のようにしてピン結合部周辺がグリ
ースによりべたべたに汚れたりする。運転者はそ
の溢出または洩出したグリースの拭き取り掃除を
行う手間と時間を要し、また高価なグリースを無
駄にするので、不経済であつた。Problems to be Solved by the Invention In the pin joint part, a gap exists between the contact surfaces of the two members, the bracket member and the boss member, due to assembly and manufacturing process reasons. When lubricating the pin joint from the greasing port, excess grease after filling the grease reservoir passes through the gap, pushes up the O-ring on the outer periphery of the contact surface of the two parts, and overflows to the outside. The portion overflows to the outside from the pin insertion hole of the bracket member. Also, while working on the hydraulic excavator, please do not
Since the boss member rattles and moves in the direction of the pin axis due to the existence of a gap between the members, the sealing effect of the O-ring is very small. As a result, earth and sand may enter the gap, and grease may overflow. As described above, the area around the pin joint becomes sticky and dirty with grease. This is uneconomical because it takes time and effort for the driver to wipe off the spilled or leaked grease, and expensive grease is wasted.
この考案は上記の課題を解決せしめるピン結合
部のシール構造を提供することを目的とする。 The object of this invention is to provide a sealing structure for a pin joint that solves the above problems.
課題を解決するための手段
イ ブラケツト部材のピン挿嵌穴内周部に、ピン
外周部の全周にわたるシール部材を設け、
ロ 一方、ブラケツト部材の内側端面にピン軸心
を中心とする同心円に沿つて凹溝を形成し、
ハ 上記凹溝に対応して同形状を有するシール部
材付リテーナを設け、かつそのリテーナをピン
軸心方向に移動自在に嵌合し、
ニ さらにブラケツト部材にボルト部材を螺着
し、そのボルト部材により上記シール部材付リ
テーナをブラケツト部材外側面側よりボス部材
端面に押圧可能に構成した。Means for Solving the Problem (1) A seal member is provided on the inner circumference of the pin insertion hole of the bracket member, covering the entire circumference of the outer circumference of the pin. (c) A retainer with a sealing member having the same shape is provided corresponding to the recessed groove, and the retainer is fitted so as to be movable in the axial direction of the pin. (d) Further, a bolt member is attached to the bracket member. The retainer with the seal member is configured to be able to be pressed against the end face of the boss member from the outer side of the bracket member by means of the bolt member.
作 用
イ ブラケツト部材のピン挿嵌穴内周部にシール
部材を設けたので、ピン挿嵌穴内周部とピン外
周部との対接面間を通つて、グリースが外部へ
洩出することはなくなつた。Function B: Since a sealing member is provided on the inner periphery of the pin insertion hole of the bracket member, grease will not leak to the outside through the contact surface between the inner periphery of the pin insertion hole and the outer periphery of the pin. Summer.
ロ ブラケツト部材内側面にピンと同心円の凹溝
を形成し、その凹溝にシール部材付リテーナを
ピン軸心方向に移動自在に嵌合せしめた。そし
て、上記リテーナをブラケツト部材に螺着した
ボルト部材により、上記シール部材付リテーナ
をボス部材端面に対して押圧するようにした。
それにより、グリースがブラケツト部材・ボス
部材の２部材対接面間隙間を通つて、外部へ洩
出することはなくなつた。また逆に、外部から
の土砂などがピン結合部内部へ侵入することは
なくなつた。A groove concentric with the pin is formed on the inner surface of the bracket member, and a retainer with a seal member is fitted into the groove so as to be movable in the axial direction of the pin. The retainer with the seal member is pressed against the end face of the boss member by a bolt member screwing the retainer onto the bracket member.
As a result, grease no longer leaks to the outside through the gap between the contact surfaces of the two members, the bracket member and the boss member. Conversely, dirt and sand from outside no longer intrude into the pin joint.
実施例
以下、この考案の実施例を図面に基いて詳細に
説明する。第１図は、この考案にかかるピン結合
部１７のシール構造を示す要部断面図である。図
において、１８はブラケツト部材、１９はボス部
材、１０′はボス部材１９の端部に圧入嵌着した
つば付ブツシユ、１１′はつば付ブツシユ１０′に
嵌着したダストシール、１２′はピン、１４′はボ
ス部材１９の外部側に設けた給脂口、１５′はＯ
リング、２０はブラケツト部材１８のピン挿嵌
穴、２１はシール部材、２２はシール部材付リテ
ーナ、２３はボルト部材、１６′はグリース溜め
室である。第２図は、第１図のＢ部詳細図であ
る。図において、２４は凹溝、２５，２６はそれ
ぞれシール部材、２７は弾性部材、２８は座金で
ある。第３図は、シール部材付リテーナ２２の斜
視図である。Embodiments Hereinafter, embodiments of this invention will be described in detail with reference to the drawings. FIG. 1 is a sectional view of a main part showing the sealing structure of the pin coupling part 17 according to this invention. In the figure, 18 is a bracket member, 19 is a boss member, 10' is a flange bushing press-fitted to the end of the boss member 19, 11' is a dust seal fitted to the flange bushing 10', 12' is a pin, 14' is a greasing port provided on the outside of the boss member 19, and 15' is O.
20 is a pin insertion hole of the bracket member 18, 21 is a sealing member, 22 is a retainer with a sealing member, 23 is a bolt member, and 16' is a grease reservoir chamber. FIG. 2 is a detailed view of section B in FIG. 1. In the figure, 24 is a groove, 25 and 26 are seal members, 27 is an elastic member, and 28 is a washer. FIG. 3 is a perspective view of the retainer 22 with a seal member.
次に、この考案にかかるピン結合部１７のシー
ル構造の構成を第１図〜第３図について述べる。
ブラケツト部材１８のピン挿嵌穴２０内周部に、
ピン１２′外周部の全周にわたるシール部材２１
を設けた。一方、ブラケツト部材１８の内側端面
にピン１２′軸心を中心とする同心円に沿つて凹
溝２４を形成し、その凹溝２４に対応して円形状
を有するシール部材付リテーナ２２を設け、かつ
そのリテーナ２２をピン軸心方向に移動自在に嵌
合した。そしてさらに、ブラケツト部材１８にボ
ルト部材２３を螺着し、そのボルト部材２３によ
り上記シール部材付リテーナ２２をブラケツト部
材１８外側面側よりボス部材１９端面イに押圧可
能に構成した。なお弾性部材２７は、ボス部材１
９がブラケツト部材１８に対してピン軸心方向へ
がたつき移動するために、リテーナ２２とボルト
部材２３先端部との間に介設している。 Next, the configuration of the sealing structure of the pin coupling portion 17 according to this invention will be described with reference to FIGS. 1 to 3.
At the inner circumference of the pin insertion hole 20 of the bracket member 18,
A sealing member 21 covering the entire circumference of the outer circumference of the pin 12'
has been established. On the other hand, a groove 24 is formed on the inner end surface of the bracket member 18 along a concentric circle centered on the axis of the pin 12', and a retainer 22 with a sealing member having a circular shape is provided corresponding to the groove 24. The retainer 22 was fitted so as to be movable in the axial direction of the pin. Further, a bolt member 23 is screwed onto the bracket member 18, and the retainer 22 with a sealing member is configured to be able to be pressed against the end face of the boss member 19 from the outer side of the bracket member 18 by the bolt member 23. Note that the elastic member 27 is attached to the boss member 1
9 is interposed between the retainer 22 and the distal end of the bolt member 23 in order to rattle and move in the pin axial direction with respect to the bracket member 18.
次に、この考案にかかるシール構造の作用機能
について述べる。ブラケツト部材１８のピン挿嵌
穴２０内周部にシール部材２１を設けたので、ピ
ン挿嵌穴２０内周部とピン１２′外周部との対接
面間を通つて、グリースが外部へ洩出することは
なくなつた。また、ブラケツト部材１８内側面に
形成した凹溝２４にシール部材付リテーナ２２を
嵌合し、上記リテーナ２２をボルト部材２３によ
りボス部材１９端面イに対して押圧するようにし
た。それにより、グリースがブラケツト部材１
８・ボス部材１９の２部材対接面間隙間を通つ
て、外部へ洩出することはなくなつた。また逆
に、外部からの土砂などがピン結合部１７内部へ
侵入することはなくなつた。 Next, the functions of the seal structure according to this invention will be described. Since the seal member 21 is provided on the inner circumference of the pin insertion hole 20 of the bracket member 18, grease is prevented from leaking to the outside through the contact surface between the inner circumference of the pin insertion hole 20 and the outer circumference of the pin 12'. I no longer have to take it out. Further, a retainer 22 with a sealing member is fitted into a groove 24 formed on the inner surface of the bracket member 18, and the retainer 22 is pressed against the end face of the boss member 19 by a bolt member 23. As a result, the grease spreads onto the bracket member 1.
8. Leakage to the outside through the gap between the contact surfaces of the two members of the boss member 19 no longer occurs. Conversely, dirt and the like from the outside no longer intrude into the pin joint portion 17.
考案の効果
ピン結合部に給脂口より給脂しているときに、
グリース溜め室充満後の過剰供給グリースが、ブ
ラケツト部材・ボス部材の対接面間隙間を通り、
さらにその２部材対接面外周部のＯリングを押上
げ外部へ溢出し、また一部はブラケツト部材のピ
ン挿嵌穴の方から外部へ溢出する。また、油圧シ
ヨベルの作業中には上記２部材間の隙間存在によ
りボス部材がピン軸心方向にがたつき移動するの
で、上記Ｏリングのシール効果は非常に小さい。
そのために土砂などが上記隙間に侵入したり、給
脂したグリースが逆に洩出する。上記のようにし
てピン結合部周辺がグリースによりべたべたに汚
れたりする。運転者はその溢出または洩出したグ
リースの拭き取り掃除を行う手間と時間を要し、
また高価なグリースを無駄にするので、不経済で
あつた。Effects of the invention When lubricating the pin joint from the greasing port,
After the grease reservoir is filled, the excess grease passes through the gap between the contact surfaces of the bracket member and boss member.
Further, the O-ring on the outer periphery of the contact surface of the two members is pushed up and spills out to the outside, and a part of it spills out from the pin insertion hole of the bracket member. Further, during operation of the hydraulic excavator, the boss member rattles and moves in the direction of the pin axis due to the presence of a gap between the two members, so the sealing effect of the O-ring is very small.
As a result, earth and sand may enter the gap, and grease may leak out. As described above, the area around the pin joint becomes sticky and dirty with grease. The driver has to spend time and effort wiping off the overflowing or leaking grease.
Moreover, it was uneconomical because expensive grease was wasted.
しかしこの考案にかかるシール構造では、ブラ
ケツト部材のピン挿嵌穴内周部にシール部材を設
け、また、ブラケツト部材内側面に形成した凹溝
にシール部材付リテーナを嵌合し、上記リテーナ
をボルト部材によりボス部材端面に対して押圧す
るようにした。それにより、ピン結合部内部のグ
リースが外部へ溢出または洩出することは防止さ
れ、また、シール部材付リテーナはボス部材のが
たつき移動とがたつき騒音を低減させるようには
たらく。 However, in the seal structure according to this invention, a seal member is provided on the inner circumference of the pin insertion hole of the bracket member, and a retainer with a seal member is fitted into a groove formed on the inner surface of the bracket member, and the retainer is attached to the bolt member. The end surface of the boss member is pressed against the end face of the boss member. This prevents the grease inside the pin joint from overflowing or leaking to the outside, and the retainer with the sealing member works to reduce rattling movement and rattling noise of the boss member.
したがつて、この考案にかかるピン結合部のシ
ール構造をそなえた建設機械では、ピン結合部に
おけるがたつき騒音を低減し、溢出グリースを拭
き掃除する手間や時間を省くようにするので、建
設機械のメンテナンス性と経済性を向上させる。 Therefore, the construction machine equipped with the sealing structure of the pin joint according to this invention reduces the rattling noise at the pin joint and saves the time and effort of wiping off overflowing grease. improve maintainability and economy.
第１図はこの考案にかかるピン結合部のシール
構造を示す要部断面図、第２図は第１図のＢ部詳
細図、第３図はシール部材付リテーナ、第４図は
油圧シヨベルの側面図、第５図は第４図のＡ−Ａ
より見たピン結合部の断面図である。
７，１７……ピン結合部、８，１８……ブラケ
ツト部材、９，１９……ボス部材、１２，１２′
……ピン、１４，１４′……給脂口、１５，１
５′……Ｏリング、２０……ピン挿嵌穴、２１，
２５，２６……シール部材、２２……リテーナ、
２３……ボルト部材。
Fig. 1 is a cross-sectional view of the main part showing the seal structure of the pin joint according to this invention, Fig. 2 is a detailed view of part B in Fig. 1, Fig. 3 is a retainer with a seal member, and Fig. 4 is a diagram of a hydraulic excavator. Side view, Figure 5 is A-A in Figure 4
FIG. 3 is a cross-sectional view of the pin joint section as seen from above. 7, 17... Pin joint portion, 8, 18... Bracket member, 9, 19... Boss member, 12, 12'
...Pin, 14,14'... Greasing port, 15,1
5'...O-ring, 20...Pin insertion hole, 21,
25, 26... Seal member, 22... Retainer,
23... Bolt member.
Claims (1)
され、かつそのピンに対して上記ボス部材が回動
自在に結合されたピン結合部において、上記ブラ
ケツト部材のピン挿嵌穴内周部に、ピン外周部の
全周にわたるシール部材を設け、一方、ブラケツ
ト部材の内側端面にピン軸心を中心とする同心円
に沿つて凹溝を形成し、その凹溝に対応して同形
状を有するシール部材付リテーナを設け、かつそ
のリテーナをピン軸心方向に移動自在に嵌合し、
さらにブラケツト部材にボルト部材を螺着し、そ
のボルト部材により上記シール部材付リテーナを
ブラケツト部材外側面側よりボス部材端面に押圧
可能に構成したことを特徴とするピン結合部のシ
ール構造。 A boss member is connected to the bracket member via a pin, and at a pin joint portion where the boss member is rotatably connected to the pin, an outer peripheral portion of the pin is attached to an inner peripheral portion of the pin insertion hole of the bracket member. A seal member is provided over the entire circumference of the bracket member, and a groove is formed along a concentric circle centered on the pin axis on the inner end surface of the bracket member, and a retainer with a seal member having the same shape is provided corresponding to the groove. and the retainer is fitted so as to be movable in the pin axial direction,
A sealing structure for a pin joint portion, further comprising a bolt member screwed onto the bracket member, and the retainer with the seal member can be pressed against the end face of the boss member from the outer side of the bracket member by the bolt member.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1988092901U JPH053772Y2 (en) | 1988-07-12 | 1988-07-12 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1988092901U JPH053772Y2 (en) | 1988-07-12 | 1988-07-12 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0214821U JPH0214821U (en) | 1990-01-30 |
| JPH053772Y2 true JPH053772Y2 (en) | 1993-01-29 |
Family
ID=31317353
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1988092901U Expired - Lifetime JPH053772Y2 (en) | 1988-07-12 | 1988-07-12 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH053772Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013147055A (en) * | 2012-01-17 | 2013-08-01 | Hitachi Constr Mach Co Ltd | Crawler for working machine |
-
1988
- 1988-07-12 JP JP1988092901U patent/JPH053772Y2/ja not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0214821U (en) | 1990-01-30 |
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