JPS61116147A - Belt block for belt type stepless transmission - Google Patents
Belt block for belt type stepless transmissionInfo
- Publication number
- JPS61116147A JPS61116147A JP23789484A JP23789484A JPS61116147A JP S61116147 A JPS61116147 A JP S61116147A JP 23789484 A JP23789484 A JP 23789484A JP 23789484 A JP23789484 A JP 23789484A JP S61116147 A JPS61116147 A JP S61116147A
- Authority
- JP
- Japan
- Prior art keywords
- belt
- pulley
- belt block
- block
- sintered alloy
- 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
Links
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
- F16G—BELTS, CABLES, OR ROPES, PREDOMINANTLY USED FOR DRIVING PURPOSES; CHAINS; FITTINGS PREDOMINANTLY USED THEREFOR
- F16G5/00—V-belts, i.e. belts of tapered cross-section
- F16G5/16—V-belts, i.e. belts of tapered cross-section consisting of several parts
- F16G5/163—V-belts, i.e. belts of tapered cross-section consisting of several parts with means allowing lubrication
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Pulleys (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は自動車用のベルト式無段変速機に用いられるベ
ルトブロックに関するもので、より詳しくはこのような
ベルトブロックについて耐摩耗性の向上を図ったものに
関する。Detailed Description of the Invention (Field of Industrial Application) The present invention relates to a belt block used in a belt-type continuously variable transmission for an automobile, and more specifically, to an improvement in the wear resistance of such a belt block. Concerning what was planned.
（従来の技術）
近時、自動車の変速機として、変速比を連続的に制御で
きる無段変速機が多く用いられている。この無段変速機
には種々の方式のものがあシ、そのなかでベルト式無段
変速機とよばれるものがある。(Prior Art) Recently, continuously variable transmissions that can continuously control the gear ratio have been widely used as transmissions for automobiles. There are various types of continuously variable transmissions, one of which is a belt-type continuously variable transmission.
このようなベルト式無段変速機における動力伝達機構の
構成を第５図に基いて説明すると。The configuration of the power transmission mechanism in such a belt type continuously variable transmission will be explained based on FIG. 5.
１及び２はそれぞれエンジン側の駆動プーリ及び車軸側
の従動プーリで、これらのグーり間に駆動ベルト３が掛
渡されている。そして、駆動プーリ１及び従動プーリ２
において、駆動ベル・ト３の掛かシ直径が必要に応じて
自動的に変速られることによシ変速が行なわれるようＫ
なっている。1 and 2 are a drive pulley on the engine side and a driven pulley on the axle side, respectively, and a drive belt 3 is stretched between these pulleys. Then, the driving pulley 1 and the driven pulley 2
In this case, the gear diameter of the drive belt 3 is automatically changed as necessary, so that the gear shift is carried out.
It has become.
この駆動ベルト３は第６図に示すように、連結部材４に
連結された厚さＬ５〜３聾程度の複数のベルトブロック
５と、ベルトブロック５に設けられた溝５ａに係合し且
つエンドレスの＠帝５〜１５枚を積層した７−グ６とか
ら構成されるものである。As shown in FIG. 6, this drive belt 3 engages with a plurality of belt blocks 5 having a thickness of about L5 to 3 mm connected to a connecting member 4, and a groove 5a provided in the belt blocks 5, and is endless. It is composed of 5 to 15 layers of 7 and 6 layers.
ところで、上記のようなベルト式無段変速機においては
ベルトブロック５の両側端部５ｈ、５ｂとグーりのテー
パ面１ａ、２ａとは互に強い力で接触することとなる。By the way, in the belt-type continuously variable transmission as described above, both end portions 5h and 5b of the belt block 5 and the gooey tapered surfaces 1a and 2a come into contact with each other with strong force.
そのため、従来、駆動プーリ１．従動プーリ２及びベル
トブロック５には。Therefore, conventionally, the drive pulley 1. For the driven pulley 2 and belt block 5.
耐摩耗性を考慮して、熱処理を行なった鋼が通常用いら
れていた。In consideration of wear resistance, heat-treated steel was usually used.
（発明が解決しよりとする問題点）
しかし々から、ベルトブロック５に関しては、熱処理を
行なった鋼を用いただ９では、なお充分な耐摩耗性を有
するものとはいえなかった。(Problems to be Solved by the Invention) However, even if the belt block 5 is made of heat-treated steel, it still cannot be said to have sufficient wear resistance.
例えば、ベルトブロック５とプーリ間の所要の摩擦係数
を確保するため、ベルトブロック５の両側端部ｓｂ、ｓ
ｂの表面には、ショツトブラスト等による微細な凹凸が
設けられている。For example, in order to ensure the required coefficient of friction between the belt block 5 and the pulley, both ends sb and s of the belt block 5 are
The surface of b is provided with fine irregularities by shot blasting or the like.
この凹凸は変速機の長期の使用により次第に摩耗し、そ
れと共にＲ１擦係数も低下することとなる。すると、ベ
ルトブロック５とプーリ１，２間にはすベシが生じ、こ
れによる摩擦熱のため両側端部５ｂ 、 ５ｂ及びテー
バ面１ａ、２ａにはぺわゆるスカッフィングが発生する
場合かちる。すなわら１両側端部５ｂ、５ｂの耐摩耗性
が充分でないことに起因して、変速機自体の破損を招く
おそれがあったのである。These irregularities gradually wear out due to long-term use of the transmission, and the R1 friction coefficient also decreases. Then, a helical bevel is generated between the belt block 5 and the pulleys 1 and 2, and due to the frictional heat caused by this, loose scuffing occurs at both end portions 5b, 5b and the tapered surfaces 1a, 2a. In other words, because the wear resistance of the first side end portions 5b, 5b is not sufficient, there is a risk that the transmission itself may be damaged.
本発明は上記事情に鑑み、なされたものであシ、その目
的とするところは、プーリのテーパ面と強く接触するベ
ルトブロックの両側端部の耐摩耗性を向上させることに
ある。The present invention has been made in view of the above circumstances, and its purpose is to improve the wear resistance of both end portions of a belt block that make strong contact with the tapered surface of the pulley.
（問題点を解決するための手段）
本発明は上記問題点を解決するための手段として、駆動
プーリ及び従動プーリと接触する両側端部を耐摩耗性焼
結合金によシ形成した構成としである。(Means for Solving the Problems) As a means for solving the above problems, the present invention has a structure in which both end portions that contact the driving pulley and the driven pulley are formed of a wear-resistant sintered alloy. be.
（実施例）
以下、本発明の実施例を第１図及び第２図に基き説明す
る。(Example) Hereinafter, an example of the present invention will be described based on FIGS. 1 and 2.
第１図は本発明の第１実施例を示すもので、ベルトブロ
ック５は粉末冶金法によシ成形されている。すなわら、
ベルトブロック５の両側端部５ｂ、５ｂは５ＭＫ１０１
５等の耐摩耗性焼結合金によシ形成され、他の本体部分
５ＣはＳＭＦ４０５０等の強度用焼結合金によシ形成さ
れている。FIG. 1 shows a first embodiment of the present invention, in which a belt block 5 is molded by powder metallurgy. In other words,
Both ends 5b of the belt block 5 are made of 5MK101.
The other main body portion 5C is made of a strong sintered alloy such as SMF4050.
そして１両側端部５ｂ、５ｂのプーリとの接触面５ｄに
は、ショツトブラスト等により表面粗さ１０〜４０μｍ
の凹凸が設けられており、接触面５ｄとプーリのテーパ
面１ａ、２ａ間の摩擦係数μが０．１〜０．１９程度に
なるように設定されている。The contact surfaces 5d of the first side end portions 5b and 5b with the pulleys are polished to a surface roughness of 10 to 40 μm by shot blasting or the like.
The friction coefficient μ between the contact surface 5d and the tapered surfaces 1a and 2a of the pulley is set to be approximately 0.1 to 0.19.
第２図は本発明の第２実施例会示すもので。FIG. 2 shows a second embodiment of the present invention.
第１図のものとは異なシ、フーグ６の通シ面も耐摩耗性
焼結合金によシ形成されている。すなわち、７−プ６に
対する耐摩耗性の向上も図られている。The through surface of the hook 6, which is different from that shown in FIG. 1, is also made of a wear-resistant sintered alloy. That is, the wear resistance against the 7-p 6 is also improved.
次に、以上のよつに構成される本ベルトブロックの性能
につき説明する。Ｋ３図は本発明の第１実施例のベルト
ブロックと従来のベルトブロックを使用した変速機につ
いてそれぞれの寿命を対比したもので、縦軸には駆動ベ
ルトとプーリ間にナベ）を生じるまでの時間（ｈｒ）が
示されている。尚、運転条件はエンジン回転数が３０Ｏ
ｒｐｍ、出力トルク７． Ｏｈｇ−ｍ、変速比ｅ＝２０
でめシ、従来のベルトブロックの材質は焼入焼戻しを行
なった高炭素クロム軸受鋼（ＳＵＪ２）である。第３図
から明らかなように％本発明のベルトブロックの耐摩耗
性が向上したため、本発明のベルトブロックを用いた変
速機においてすべｐを生じるまでの時間即ちベルトブロ
ックの寿命が約１．５倍向上したものとなっている。Next, the performance of the present belt block constructed as described above will be explained. Figure K3 compares the service life of a transmission using the belt block of the first embodiment of the present invention and a conventional belt block. (hr) is shown. In addition, the operating condition is that the engine speed is 30O.
rpm, output torque7. Ohg-m, gear ratio e=20
The material of the conventional belt block is quenched and tempered high carbon chromium bearing steel (SUJ2). As is clear from FIG. 3, the abrasion resistance of the belt block of the present invention has been improved by %, so that the time until slippage occurs in a transmission using the belt block of the present invention, that is, the life of the belt block is approximately 1.5%. It has been improved twice.
第４図は本発明の第１実施例のベルトブロックと従来の
ベルトブロックの相手攻撃性即ちベルトブロックによる
プーリの摩耗量を対比したものである。運転条件及び従
来のベルトブロックの材質は第３図の場合と同様であシ
、縦軸には運転時間２００ ｈｒ経過後のプーリの摩耗
量（μ−を示しである。FIG. 4 compares the aggressivity of the belt block according to the first embodiment of the present invention and the conventional belt block, that is, the amount of wear on the pulleys caused by the belt block. The operating conditions and the material of the conventional belt block are the same as those shown in FIG. 3, and the vertical axis shows the wear amount (μ-) of the pulley after 200 hr of operating time.
第４図から明らかなように、本発明によるベルトブロッ
クを用いた場合のプーリの摩耗量は、従来のベルトブロ
ックを用いた場合の１／２〜１／３に減少している。こ
れは本ベルトブロックの両側端部に形成した焼結合金の
特性により得られる効果と考えられる。As is clear from FIG. 4, the amount of pulley wear when using the belt block according to the present invention is reduced to 1/2 to 1/3 of that when using the conventional belt block. This effect is thought to be due to the characteristics of the sintered alloy formed on both ends of the belt block.
すなわち、プーリ表面が摩耗するひとつの原因として、
プーリとベルトブロックとの間〈介在する潤滑油等の油
膜厚が不足することがあげられるが１本発明のベルトブ
ロックの如く焼結合金を用いることとすれば、油膜厚が
不足したとしても、焼結合金の気孔中に入）込んでいる
潤滑油にょシ、この油膜厚の不足を補うことができるの
である。さらに、焼偕合金の場合は。In other words, one of the causes of pulley surface wear is
Between the pulley and the belt block, the thickness of the oil film of intervening lubricating oil etc. may be insufficient, but if a sintered alloy is used as in the belt block of the present invention, even if the oil film thickness is insufficient, The lubricating oil that has entered the pores of the sintered alloy can compensate for this lack of oil film thickness. Furthermore, in the case of annealing alloys.
従来の熱処理した鋼などに比べ、プーリとの当〕が軟ら
かくなることも、プーリの摩耗量の減少に寄与している
ものと考えられる。Compared to conventional heat-treated steel, the contact with the pulley is softer, which is also thought to contribute to the reduction in pulley wear.
（発明の効果） 本発明は上述のように＃成されるものであ）。(Effect of the invention) The present invention is accomplished as described above).
以下の効果を有する。It has the following effects.
■ ベルトブロックのプーリとの接触部分である両側端
部を耐摩耗性焼結合金により形成し念ため、ベルトブロ
ックの耐摩耗性が向上し。■ Both ends of the belt block that come in contact with the pulleys are made of wear-resistant sintered alloy, which improves the wear resistance of the belt block.
従来のベルトブロックと比べて大［Ｋ 寿命カ長くなっ
た。Longer life than conventional belt blocks.
■ ベルトブロックの相手攻撃性即ちベルトブロックに
よるプーリの摩耗量を、従来のベルトブロックを用いた
場合に比べて大幅に減少させることができる。したがっ
て、本発明によればベルトブロックのみならずプーリの
寿命をも長くすることが可能となる。(2) The aggressiveness of the belt block, that is, the amount of wear on the pulleys caused by the belt block, can be significantly reduced compared to when a conventional belt block is used. Therefore, according to the present invention, it is possible to extend the life of not only the belt block but also the pulley.
■ 焼結合金を用いることとし之ため、ベルトブロック
製造の際に機械加工を一部省略することが可能となる。- Since a sintered alloy is used, it is possible to omit some machining when manufacturing the belt block.
特に、実施例においては両側端部ばかシでなく本体部に
ついても焼結合金としたため１機械加工の省略による作
業工程の大幅な短縮が期待できる。In particular, in the embodiment, since the main body is made of sintered alloy instead of the both end portions, it is expected that one machining process will be omitted and the working process will be significantly shortened.
第１図及び第２図はそれぞれ本発明の第１実施例及び第
２実−施例のベルトブロックを示す断面図、第３図及び
第４図は本発明の第１実施例のベル・ドブロックの性能
を示すグラフ図、第５図はベルト式無段変速機における
動力伝達機構の構成の概略を示す斜視図、第６図は第５
図に用いられたベルトの構成を示す拡大斜視図である。
１・−・駆動プーリ、 ２・・・従動プーリ３・・・
駆動ベルト、 ５・・・ベルトブロックｓｂ、ｓｂ・
・・両側端部
特許出願人 トヨタ自動車株式会社
第１図
第２図
ｂｌ） ５ｃ
第３図
第４図
第５図
第６図1 and 2 are cross-sectional views showing belt blocks according to the first and second embodiments of the present invention, respectively, and FIGS. 3 and 4 are cross-sectional views showing belt blocks according to the first embodiment of the present invention. A graph showing the performance of the block, Fig. 5 is a perspective view showing the outline of the configuration of the power transmission mechanism in a belt type continuously variable transmission, and Fig.
It is an enlarged perspective view showing the structure of the belt used in the figure. 1... Drive pulley, 2... Driven pulley 3...
Drive belt, 5...belt block sb, sb・
...Both Ends Patent Applicant Toyota Motor Corporation Figure 1 Figure 2 bl) 5c Figure 3 Figure 4 Figure 5 Figure 6
Claims (1)
ルトを、エンジン側の駆動プーリと車軸側の従動プーリ
との間に掛渡したベルト式無段変速機において、前記駆
動プーリ及び従動プーリと接触する両側端部を耐摩耗性
焼結合金により形成したことを特徴とするベルト式無段
変速機用ベルトブロック。(1) In a belt-type continuously variable transmission in which a drive belt consisting of a plurality of connected belt blocks is stretched between a drive pulley on the engine side and a driven pulley on the axle side, contact is made with the drive pulley and the driven pulley. A belt block for a belt type continuously variable transmission, characterized in that both end portions of the belt block are made of a wear-resistant sintered alloy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23789484A JPS61116147A (en) | 1984-11-12 | 1984-11-12 | Belt block for belt type stepless transmission |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23789484A JPS61116147A (en) | 1984-11-12 | 1984-11-12 | Belt block for belt type stepless transmission |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61116147A true JPS61116147A (en) | 1986-06-03 |
Family
ID=17021997
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP23789484A Pending JPS61116147A (en) | 1984-11-12 | 1984-11-12 | Belt block for belt type stepless transmission |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61116147A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4917658A (en) * | 1988-07-05 | 1990-04-17 | Tsubakimoto Chain Co. | Friction plate for CVT chain |
| CN110030326A (en) * | 2017-12-28 | 2019-07-19 | 丰田自动车株式会社 | The band element of vehicle transmission belt |
-
1984
- 1984-11-12 JP JP23789484A patent/JPS61116147A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4917658A (en) * | 1988-07-05 | 1990-04-17 | Tsubakimoto Chain Co. | Friction plate for CVT chain |
| CN110030326A (en) * | 2017-12-28 | 2019-07-19 | 丰田自动车株式会社 | The band element of vehicle transmission belt |
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