JPS621025Y2 - - Google Patents
Info
- Publication number
- JPS621025Y2 JPS621025Y2 JP6494181U JP6494181U JPS621025Y2 JP S621025 Y2 JPS621025 Y2 JP S621025Y2 JP 6494181 U JP6494181 U JP 6494181U JP 6494181 U JP6494181 U JP 6494181U JP S621025 Y2 JPS621025 Y2 JP S621025Y2
- Authority
- JP
- Japan
- Prior art keywords
- oil
- cover
- carrier roller
- upper roller
- hole
- 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
Links
- 239000000945 filler Substances 0.000 claims 2
- 239000003921 oil Substances 0.000 description 73
- 239000010687 lubricating oil Substances 0.000 description 7
- 238000005096 rolling process Methods 0.000 description 7
- 238000002347 injection Methods 0.000 description 6
- 239000007924 injection Substances 0.000 description 6
- 238000005452 bending Methods 0.000 description 3
- 238000005461 lubrication Methods 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 238000003466 welding 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
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
Description
この考案は、建設機械、土木機械、農業機械等
の装軌車両における転輪装置、さらにくわしく言
えば片持ち支持形の上転輪装置に関するものであ
る。
第１図は油圧シヨベルの一例を示し、走行体の
フレーム３の前後には遊動輪５、駆動輪６が支持
されており、両輪５，６間には無端状の履帯４が
かけ渡されている。履帯４の上がわはフレーム３
に取付けた上転輪１に支えられ、履帯４の下がわ
はフレーム３に取付けた下転輪２で受けられてい
る。上転輪１は、フレーム３との間に土砂等が堆
積しやすいことから、できるだけフレーム上面に
は土砂の付着を助長しないよう固定物を設けない
ようにし、堆積した場合にも除去しやすいよう
に、片持ち構造とし、回転不能になるのを防止す
るのが通例である。上転輪１は、走行中における
履帯４の張力の下向きの荷重成分および履帯４の
上がわ部の重量を支持する。
つぎに、従来の上転輪装置を第２図および第３
図により説明する。
軸７は軸受８にしまり嵌め嵌合させられ、ロー
ルピン９で固定されている。軸７の軸受８がわの
外周面部には潤滑油の漏れを防ぐＯリング１０が
取付けられている。軸受８はボルト締め、あるい
は溶接によりフレーム上面部３ａに固定されてい
る。
上転輪１の穴にはブツシユ１１Ａ，１１Ｂが圧
入されており、両ブツシユ１１Ａ，１１Ｂは軸７
にはめこまれている。上転輪１と軸受８との対向
部には、潤滑油を密封するためのメカニカルシー
ル１２が設置されており、上転輪１の反軸受がわ
の端部にはカバー１３がボルト１４により固定さ
れており、軸７のカバーがわの端面部には、スラ
ストプレート１５がボルト１６により固定されて
いる。カバー１３の中央部にはプラグ２２が取付
けられており、カバー１３の上転輪１への嵌合部
にはＯリング２３が取付けられている。
上転輪１の中央内部には油溜め１７が設けら
れ、カバー１３の内部には油溜め１８が設けられ
ている。軸７の軸心部には油溜め１８に開口する
油道１９が設けられ、軸７の半径方向には、一端
を油道１９に開口させ他端を油溜め１７に開口さ
せた油穴２０Ａと、一端を油道１９に開口させ他
端をメカニカルシール油溜め部２１に開口させた
油穴２０Ｂとが設けられ、軸７の下がわ部にはブ
ツシユ１１Ａ，１１Ｂとの間に隙間を形成する油
溝２４Ａ，２４Ｂが設けられている。
この上転輪装置における注油は下記のようにし
て行う。第３図に示すように、軸７の油道１９
に、外周面部にＯリング２６を取付けた円管状の
注入治具本体２５を挿入し、カバー１３のボルト
締付面がわを上面にして注入治具本体２５の穴２
５ａを通して潤滑油３０を注入する。注入した潤
滑油は、油穴２０Ｂを経て油溜め部２１に導かれ
る。油溜め部２１内の空気は、油溝２４Ａを経て
油溜め１７に至り、さらに、油穴２０Ａ、注入治
具本体２５と油道１９の内周面との隙間２７を通
つて油溜め１８へ、あるいは油溝２４Ｂ、ブツシ
ユ１１Ｂの油溝２８、カバー１３の油溝２９を通
つて油溜め１８に至り、プラグ２２の穴から大気
中へ放出させられる。油溜め部２１中に潤滑油が
充満されると、上記空気通路を通つて油溜め１８
に油が充満する。油溜め１８の空気は上記のよう
に放出させられる。注入油量は油溜め１８を充満
する程度で第２図の上転輪の取付け状態において
油面３０ａに達する。
上述した従来の上転輪１に履帯４から荷重Ｆが
かかつた時の軸７の曲げ応力σbは、軸７の直径
をd1とすれば
σb＝Fl1／（πｄ１ ３／３２）
軸７の曲げ許容応力をσaとし、σa＝σbとす
れば、
This invention relates to a wheel device for a tracked vehicle such as a construction machine, a civil engineering machine, or an agricultural machine, and more specifically to a cantilever-supported upper wheel device. FIG. 1 shows an example of a hydraulic excavator, in which an idler wheel 5 and a driving wheel 6 are supported at the front and rear of a frame 3 of a traveling body, and an endless crawler track 4 is stretched between the two wheels 5 and 6. There is. The upper part of crawler track 4 is frame 3
The lower side of the crawler track 4 is supported by a lower roller 2 attached to a frame 3. Because dirt and the like tend to accumulate between the upper wheel 1 and the frame 3, it is recommended that no fixed objects be provided on the upper surface of the frame as much as possible to prevent dirt from adhering to the upper surface of the frame. It is customary to use a cantilevered structure to prevent rotation from becoming impossible. The upper wheels 1 support the downward load component of the tension of the crawler belt 4 and the weight of the upper side of the crawler belt 4 during running. Next, we will introduce the conventional upper roller device as shown in Figures 2 and 3.
This will be explained using figures. The shaft 7 is tightly fitted into a bearing 8 and fixed with a roll pin 9. An O-ring 10 is attached to the outer peripheral surface of the shaft 7 next to the bearing 8 to prevent lubricating oil from leaking. The bearing 8 is fixed to the frame upper surface portion 3a by bolting or welding. Bushes 11A and 11B are press-fitted into the holes of the upper roller 1, and both bushes 11A and 11B are connected to the shaft 7.
It's stuck in. A mechanical seal 12 for sealing lubricating oil is installed at the opposing portion of the upper wheel 1 and the bearing 8, and a cover 13 is attached to the end of the upper wheel 1 opposite to the bearing with bolts 14. A thrust plate 15 is fixed to the end surface of the shaft 7 near the cover with bolts 16. A plug 22 is attached to the center of the cover 13, and an O-ring 23 is attached to the fitting portion of the cover 13 to the upper wheel 1. An oil reservoir 17 is provided inside the center of the upper wheel 1, and an oil reservoir 18 is provided inside the cover 13. An oil passage 19 that opens to the oil sump 18 is provided at the axial center of the shaft 7, and an oil hole 20A is provided in the radial direction of the shaft 7, with one end opening to the oil passage 19 and the other end opening to the oil sump 17. and an oil hole 20B with one end opened to the oil passage 19 and the other end opened to the mechanical seal oil reservoir 21, and a gap is provided between the shaft 7 and the bushes 11A and 11B at the lower side of the shaft 7. Oil grooves 24A and 24B are provided. Lubrication in this upper wheel device is performed as follows. As shown in FIG.
Insert the cylindrical injection jig main body 25 with the O-ring 26 attached to the outer peripheral surface, and insert the injection jig main body 25 into the hole 2 of the injection jig main body 25 with the bolt tightening surface of the cover 13 facing upward.
Lubricating oil 30 is injected through 5a. The injected lubricating oil is guided to the oil reservoir 21 through the oil hole 20B. The air in the oil sump 21 reaches the oil sump 17 via the oil groove 24A, and further passes through the oil hole 20A and the gap 27 between the injection jig main body 25 and the inner peripheral surface of the oil channel 19 to reach the oil sump 18. Alternatively, the oil reaches the oil reservoir 18 through the oil groove 24B, the oil groove 28 of the bush 11B, and the oil groove 29 of the cover 13, and is discharged into the atmosphere from the hole of the plug 22. When the oil reservoir 21 is filled with lubricating oil, it passes through the air passage to the oil reservoir 18.
is filled with oil. The air in the oil sump 18 is vented as described above. The amount of injected oil is enough to fill the oil reservoir 18 and reaches the oil level 30a in the state in which the upper roller is installed as shown in FIG. The bending stress σ b of the shaft 7 when a load F is applied from the crawler track 4 to the above-mentioned conventional upper roller wheel 1 is expressed as σ b =Fl 1 /(πd 1 3 / 32) If the allowable bending stress of shaft 7 is σ a , and σ a = σ b , then
【式】となる。
ただし、l1は軸受８の荷重点と上転輪１の中央
との間の距離である。
一方、稼動時においては、常に履帯４に粘着土
が付着し、フレーム３上にそれらが堆積し、上転
輪１の回転を阻害し、上転輪１の転動面を摩耗さ
せる。
一般に、上転輪１の回転性能は、上転輪１の転
動径D1と軸７の直径d1との比D1／d1で決まり、
この値を大きくとることが回転性能の向上につな
がる。したがつて、D1を一定にするならばd1を
極力小さくすることが望ましい。すなわち、
[Formula] becomes. However, l 1 is the distance between the load point of the bearing 8 and the center of the upper roller 1. On the other hand, during operation, sticky soil always adheres to the crawler belt 4 and accumulates on the frame 3, obstructing the rotation of the upper roller 1 and causing wear of the rolling surface of the upper roller 1. Generally, the rotation performance of the upper roller 1 is determined by the ratio D 1 /d 1 of the rolling diameter D 1 of the upper roller 1 and the diameter d 1 of the shaft 7.
Increasing this value leads to improved rotational performance. Therefore, if D 1 is to be kept constant, it is desirable to make d 1 as small as possible. That is,
【式】よりl1を小さくすることにな
る。
ところが、従来の構造の上転輪においては、上
転輪１の中央部に油溜め１７が設けられているこ
と、およびブツシユ１１Ａ，１１Ｂの面圧等から
l1を小さく取り得ない。したがつて、軸７の曲げ
許容応力から決定されるd1の値は大きくなり、
D1／d1が低下し、回転性能を悪化する。
この考案は、上記の欠点を容易に除くことがで
きる上転輪装置を提供することを目的とするもの
である。
以下、この考案の一実施態様を第４図により説
明する。同図において、第２図と同じ符号をつけ
たものは、同じもの、もしくは相当するものを表
わす。
軸７にはブツシユ３１が取付けられており、ブ
ツシユ３１のまわりには軸線方向に油穴１ａ，１
ｂを設けた上転輪１がはめこまれている。上転輪
１の反軸受がわの端部に固定したカバー１３に
は、給油プラグ３２とレベルプラグ３３と、上転
輪用油溜め３４と、油溝３５，３６と、一端を給
油プラグ３２の穴につらね他端を油溝３６につら
ねた油穴３７と、一端をレベルプラグ３３の穴に
つらね他端を油溜め３４につらねた油穴３８とが
設けられている。油溝３５，３６は上転輪１の内
部の環状油室３９につらなつており、油穴１ａ，
１ｂの一端はそれぞれ環状油室３９につらなり、
他端はそれぞれ油溜め２１につらなつている。油
溜め３４の容積は、転輪１、メカニカルシール１
２の潤滑を行うに足りる油をたくわえることがで
きるように定められている。
潤滑油の注入は、注入プラグ３２、レベルプラ
グ３３を取りはずし、給油プラグ３２の穴に注油
治具（図示してない）を押付けて密着させて行
う。注入された潤滑油は、油穴３７、油溝３６、
環状油室３９、油穴１ａ、油溜め２１、油穴１
ｂ、環状油室３９、油溝３５を経て油溜め３４に
たまる。そして、油穴３５の下面に油面が達した
ところで注油が完了する。注油の際、空気は前記
通路および油穴３８を通つてレベルプラグ３３の
穴から放出させられる。
上述したように、この考案は上転輪１には油溜
めを設けず、カバー１３に上転輪用の油溜め３４
を設けたので、軸受８の荷重点と上転輪１の中央
との間の距離l2を従来の上転輪１におけるそれl1
より小さくすることができる。よつて、軸７の径
をd2上転輪１の転動径をD2とすれば、従来の上
転輪１の転動径D1軸７の径d1に対して
From [Formula], l 1 will be made smaller. However, in the upper roller of the conventional structure, the oil reservoir 17 is provided in the center of the upper roller 1, and the surface pressure of the bushes 11A, 11B, etc.
l 1 cannot be made smaller. Therefore, the value of d 1 determined from the bending allowable stress of the shaft 7 becomes large,
D 1 /d 1 decreases, deteriorating rotational performance. The object of this invention is to provide an upper roller device that can easily eliminate the above-mentioned drawbacks. Hereinafter, one embodiment of this invention will be explained with reference to FIG. In this figure, the same reference numerals as in FIG. 2 represent the same or equivalent items. A bush 31 is attached to the shaft 7, and oil holes 1a, 1 are provided around the bush 31 in the axial direction.
An upper rolling wheel 1 provided with b is fitted. The cover 13 fixed to the end opposite to the bearing of the upper wheel 1 has an oil supply plug 32, a level plug 33, an oil reservoir 34 for the upper wheel, oil grooves 35, 36, and one end is connected to the oil supply plug 32. An oil hole 37 has one end connected to the hole of the level plug 33 and the other end connected to the oil groove 36, and an oil hole 38 which has one end connected to the hole of the level plug 33 and the other end connected to the oil sump 34. The oil grooves 35, 36 are connected to an annular oil chamber 39 inside the upper roller 1, and the oil holes 1a,
One end of 1b is connected to the annular oil chamber 39,
The other ends are connected to oil reservoirs 21, respectively. The volume of the oil reservoir 34 is 1 wheel and 1 mechanical seal.
It is designed to be able to store enough oil for lubrication. Injection of lubricating oil is carried out by removing the injection plug 32 and the level plug 33, and pressing an oil filling jig (not shown) into the hole of the oil supply plug 32 so as to bring it into close contact. The injected lubricating oil flows through the oil holes 37, oil grooves 36,
Annular oil chamber 39, oil hole 1a, oil reservoir 21, oil hole 1
b. The oil passes through the annular oil chamber 39 and the oil groove 35 and accumulates in the oil reservoir 34. Then, when the oil level reaches the lower surface of the oil hole 35, the oil filling is completed. During lubrication, air is forced out of the hole in the level plug 33 through the passage and the oil hole 38. As mentioned above, in this invention, the upper roller wheel 1 is not provided with an oil reservoir, but the cover 13 is provided with an oil reservoir 34 for the upper roller wheel.
, the distance l 2 between the load point of the bearing 8 and the center of the upper roller 1 is set to l 1 than that of the conventional upper roller 1.
Can be made smaller. Therefore, if the diameter of the shaft 7 is d 2 and the rolling diameter of the upper roller 1 is D 2 , then the rolling diameter D of the conventional upper roller 1 is 1 compared to the diameter d 1 of the shaft 7.
【式】となり、したがつて、
となる。転動径を一定にするならば、すなわち、
D2＝D1＝Ｄとすると、回転性能は[Formula], and therefore, becomes. If the rolling diameter is kept constant, that is,
If D 2 = D 1 = D, the rotation performance is
【式】
倍向上することになる。
以上説明したこの考案によれば下記の効果が得
られる。
(1) 上転輪の全長を短くし、全体を小形化するこ
とができる。
(2) 軸受の荷重点までの距離が短縮できるゆえ、
軸の直径を細く[Formula] This will result in a doubling of the improvement. According to this invention explained above, the following effects can be obtained. (1) The overall length of the upper roller can be shortened, making the entire system more compact. (2) Because the distance to the bearing load point can be shortened,
Decrease the diameter of the shaft
【式】し、上転
輪の転動径Ｄと軸径ｄとの比Ｄ／ｄを大きく
[Formula], and increase the ratio D/d of the rolling diameter D of the upper roller and the shaft diameter d.
【式】し、回転性能を向上できる。[Formula] and rotation performance can be improved.
第１図は油圧シヨベルの一例を示す側面図、第
２図は従来の上転輪装置を示す断面正面図、第３
図は第２図の上転輪装置における注油態様を説明
するための説明用断面図、、第４図はこの考案の
一実施態様を示す断面正面図である。
１……上転輪、１ａ，１ｂ……油穴、３……フ
レーム、７……軸、８……軸受、９……ロールピ
ン、１２……メカニカルシール、１３……カバ
ー、１４……ボルト、１５……スラストプレー
ト、１６……ボルト、２１……メカニカルシール
油溜め部、３１……ブツシユ、３２……給油プラ
グ、３３……レベルプラグ、３４……上転輪用油
溜め、３５，３６……油溝、３７，３８……油
穴、３９……環状油室。
Fig. 1 is a side view showing an example of a hydraulic excavator, Fig. 2 is a sectional front view showing a conventional upper roller device, and Fig. 3 is a side view showing an example of a hydraulic excavator.
The figure is an explanatory cross-sectional view for explaining the lubricating aspect of the upper roller device shown in FIG. 2, and FIG. 4 is a cross-sectional front view showing one embodiment of this invention. 1... Upper roller, 1a, 1b... Oil hole, 3... Frame, 7... Shaft, 8... Bearing, 9... Roll pin, 12... Mechanical seal, 13... Cover, 14... Bolt , 15... Thrust plate, 16... Bolt, 21... Mechanical seal oil reservoir, 31... Bush, 32... Oil supply plug, 33... Level plug, 34... Upper wheel oil reservoir, 35, 36... Oil groove, 37, 38... Oil hole, 39... Annular oil chamber.
Claims (1)
に、上転輪をブツシユを介して支持させるととも
に、軸受と上転輪との間にメカニカルシールを設
置し、上転輪の反軸受がわ端部にカバーを取付け
た上転輪装置において、カバーの内部には上転輪
用油溜めを設け、カバーの下がわには給油プラグ
を設け、カバーの上がわにはレベルプラグを設
け、給油プラグの穴をカバーおよび上転輪に設け
た油通路を介してメカニカルシールの油溜めにつ
らねるとともに、レベルプラグの穴をカバーおよ
び上転輪に設けた油通路ならびにカバーの油溜め
を介してメカニカルシールの油溜めにつらねたこ
とを特徴とする上転輪装置。 A carrier roller device in which an axle is attached to a bearing fixed to a frame, a carrier roller is supported on the axle via a bushing, a mechanical seal is installed between the bearing and the carrier roller, and a cover is attached to the end of the carrier roller opposite the bearing, wherein an oil reservoir for the carrier roller is provided inside the cover, an oil filler plug is provided on the lower side of the cover, and a level plug is provided on the upper side of the cover, and the hole of the oil filler plug is connected to the oil reservoir of the mechanical seal via an oil passage provided in the cover and the carrier roller, and the hole of the level plug is connected to the oil reservoir of the mechanical seal via the oil passage provided in the cover and the carrier roller and the oil reservoir in the cover.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6494181U JPS621025Y2 (en) | 1981-05-02 | 1981-05-02 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6494181U JPS621025Y2 (en) | 1981-05-02 | 1981-05-02 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57176379U JPS57176379U (en) | 1982-11-08 |
| JPS621025Y2 true JPS621025Y2 (en) | 1987-01-10 |
Family
ID=29860982
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6494181U Expired JPS621025Y2 (en) | 1981-05-02 | 1981-05-02 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS621025Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11565760B2 (en) * | 2019-11-12 | 2023-01-31 | Caterpillar Inc. | Track roller with reduced stiffness |
-
1981
- 1981-05-02 JP JP6494181U patent/JPS621025Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57176379U (en) | 1982-11-08 |
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