JPH0517506Y2 - - Google Patents
Info
- Publication number
- JPH0517506Y2 JPH0517506Y2 JP1986077301U JP7730186U JPH0517506Y2 JP H0517506 Y2 JPH0517506 Y2 JP H0517506Y2 JP 1986077301 U JP1986077301 U JP 1986077301U JP 7730186 U JP7730186 U JP 7730186U JP H0517506 Y2 JPH0517506 Y2 JP H0517506Y2
- Authority
- JP
- Japan
- Prior art keywords
- transmission
- speed change
- shaft
- operation shaft
- change operation
- 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
- 230000005540 biological transmission Effects 0.000 claims description 64
- 230000037431 insertion Effects 0.000 claims description 2
- 238000003780 insertion Methods 0.000 claims description 2
- 244000025254 Cannabis sativa Species 0.000 description 1
Landscapes
- Arrangement Of Transmissions (AREA)
- Gear-Shifting Mechanisms (AREA)
Description
【考案の詳細な説明】
〔産業上の利用分野〕
本考案は、伝動比が異なる複数個の変速伝動ギ
アを１本の伝動軸に相対回転自在に外嵌し、前記
伝動軸の内部に、軸芯方向に沿つて軸内挿用の空
間部を形成し、この空間部に対して、前記伝動軸
の一端側から、前記複数の変速伝動ギアを前記伝
動軸に対して択一的に係合連結させるスライド操
作用の変速操作軸をスライド自在に内嵌した変速
装置に関する。[Detailed description of the invention] [Industrial application field] The present invention has a plurality of variable speed transmission gears having different transmission ratios fitted externally to one transmission shaft so as to be relatively rotatable, and inside the transmission shaft, A space for shaft insertion is formed along the axial direction, and the plurality of transmission gears are selectively engaged with the transmission shaft from one end side of the transmission shaft in this space. The present invention relates to a transmission device in which a speed change operation shaft for sliding operation to be coupled and connected is slidably fitted inside.
上記変速装置は、変速伝動ギアをシフトフオー
クを用いて摺動させて被変速伝動ギアに咬合させ
る変速装置に比して、シフトフオーク配設用のス
ペースが不要で変速装置のコンパクト化をはかれ
る利点がある。
Compared to a transmission device in which the transmission gear is slid using a shift fork and engaged with the transmission gear to be changed, the above-mentioned transmission device has the advantage that no space is required for installing the shift fork, and the transmission device can be made more compact. There is.
従来、上記変速装置は、実公昭49−42534号公
報に示される如く、変速操作軸としての変速ロツ
ドの先端に、この変速ロツドを直交方向で貫通す
るスライド自在な係合ピンを設け、他方、係合ピ
ンに係合するギアの内孔を軸芯方向において波状
に形成して、前記変速ロツドのスライドにより前
記係合ピンを上下動させてギアに択一的に係合連
結させる構造のものであつた。 Conventionally, as shown in Japanese Utility Model Publication No. 49-42534, the above-mentioned transmission has been provided with a slidable engagement pin at the tip of a speed change rod serving as a speed change operation shaft, which passes through the speed change rod in an orthogonal direction; A structure in which the inner hole of the gear that engages with the engagement pin is formed in a wave shape in the axial direction, and the engagement pin is moved up and down by the slide of the speed change rod to selectively engage and connect with the gear. It was hot.
ギアに係合した係合ピンは、ギアと一体的に回
転し、従つて、変速ロツドとレバーとの連結部
に、変速ロツドが回転してもレバーは回転するこ
とがない構造を設けておかなければならず、又、
連結部での摩擦による伴回りを防止する為には、
レバーをミツシヨンケースに固定しておかなけれ
ばならない等の不都合があつた。
The engagement pin that engages with the gear rotates integrally with the gear, so the connection between the shift rod and the lever must be provided with a structure that will prevent the lever from rotating even if the shift rod rotates. Must be, and
In order to prevent trailing rotation due to friction at the connecting part,
There were inconveniences such as the need to fix the lever to the transmission case.
又、変速ロツドのスライドにより係合ピンを上
下動させてギアに択一的に係合させる構造のもの
では、変速ロツドのスライド操作が行いにくいと
いう不都合があつた。 Further, in a structure in which the engaging pin is moved up and down by sliding the gear shift rod to selectively engage the gear, there is a problem in that it is difficult to slide the gear shift rod.
本考案は、変速操作軸とギアとの係合構造を工
夫して上記欠点を解消することを目的とする。 The present invention aims to solve the above-mentioned drawbacks by devising the engagement structure between the speed change operation shaft and the gear.
上記目的を達成する為の本考案の特徴構成は、
前記変速操作軸と前記変速伝動ギアとを、変速操
作軸に対して、変速操作軸の周溝部を介して相対
回転自在に装着され、且つ、伝動軸の軸芯方向に
沿つて形成されている長孔から突出する状態に位
置させた連動片を介して係合連結可能に構成し、
さらに、その連動片を、前記変速操作軸の軸芯方
向での長さが前記変速操作軸の周方向での長さよ
り大であるように形成した点にあり、その作用・
効果は次の通りである。
The characteristic structure of this invention to achieve the above purpose is as follows:
The speed change operation shaft and the speed change transmission gear are attached to the speed change operation shaft so as to be freely rotatable relative to the speed change operation shaft via a circumferential groove portion of the speed change operation shaft, and are formed along the axial direction of the transmission shaft. configured to be able to be engaged and connected via an interlocking piece positioned to protrude from the elongated hole,
Furthermore, the interlocking piece is formed such that the length in the axial direction of the speed change operation shaft is larger than the length in the circumferential direction of the speed change operation shaft,
The effects are as follows.
変速伝動ギアに係合した連動片は、ギアと伴に
回転しても、変速操作軸は回転することがない。
また、連動片はスライド操作時に上下動すること
がなく、さらに、連動片の軸芯方向の長さを周方
向の長さより大に設定してあるから、連動片の軸
芯方向の傾動がなく、連動片と変速操作軸及び変
速伝動ギア間にこじれが出ることを抑制しなが
ら、連動片の咬合切換え摺動を行わせられる。
Even if the interlocking piece engaged with the speed change transmission gear rotates together with the gear, the speed change operation shaft does not rotate.
In addition, the interlocking piece does not move up and down during slide operation, and since the length of the interlocking piece in the axial direction is set larger than the length in the circumferential direction, there is no tilting of the interlocking piece in the axial direction. The interlocking piece can be slid to change engagement while suppressing distortion between the interlocking piece, the speed change operation shaft, and the speed change transmission gear.
上記構成の結果、変速操作軸に直接レバーを固
着することもでき、変速操作軸とレバーとの連係
構造が簡単となる。
As a result of the above configuration, the lever can be directly fixed to the speed change operation shaft, and the linkage structure between the speed change operation shaft and the lever is simplified.
そして、変速操作軸に対して連動片を相対回転
自在に装着するものであり乍ら連動片の軸芯方向
の長さ設定により、変速操作軸のスライド操作が
スムーズに行える。 The interlocking piece is rotatably mounted relative to the speed change operation shaft, and by setting the length of the interlocking piece in the axial direction, the speed change operation shaft can be smoothly slid.
第４図に示すように、左右一対の前車輪１，１
及び後車輪２，２を備え、かつ、縦軸芯周りで回
動自在な刈刃３を内装した刈刃ハウジング４の上
部にエンジンＥを取付け、このエンジンＥの出力
を前記刈刃３に伝達すると共に、前記エンジン出
力の一部を前後向きの動力伝達軸５、及び、変速
装置６を介して前記後車輪２，２に伝達するよう
に構成し、そして、前記刈刃ハウジング４の後部
に操縦ハンドル７及び集草容器８を取付けて、歩
行型芝刈機を構成してある。
As shown in Fig. 4, a pair of left and right front wheels 1, 1
An engine E is attached to the upper part of a cutting blade housing 4 which includes rear wheels 2, 2 and a cutting blade 3 rotatable around a vertical axis, and transmits the output of the engine E to the cutting blade 3. At the same time, a portion of the engine output is transmitted to the rear wheels 2, 2 via a front-rearward power transmission shaft 5 and a transmission 6, and a A walking lawn mower is constructed by attaching a control handle 7 and a grass collecting container 8.
前記変速装置６について詳述すれば、第１図及
び第２図に示すように、前記動力伝達軸５の回動
力が入力軸９、ベベルギア１１、及び、爪式走行
用クラツチ１２を介して伝達されるようにミツシ
ヨンケース１０に回転自在に取付けた伝動軸１３
に、伝動比が異なるように径を相違させた２個の
変速伝動ギア１４，１５を、後車軸１６に一体回
転可能に取付けられた大径ギア１８と小径ギア１
９に各別に係合した状態で相対回転自在に外嵌す
ると共に、前記変速伝動ギア１４，１５を前記伝
動軸１３に解除自在に連動させる２つの連動片２
０ａ，２０ｂを、前記変速伝動ギア１４，１５内
に摺動自在に設けて、伝動軸１３の回動力を後車
輪１６に伝達するように、かつ、連動片２０ａ，
２０ｂを変速伝動ギア１４又は１５に択一的に係
合するように係合切換えさせて、伝達速度を高低
２段に変速するように構成してある。 In detail, regarding the transmission device 6, as shown in FIG. 1 and FIG. The transmission shaft 13 is rotatably attached to the transmission case 10 so as to
Two speed change transmission gears 14 and 15 with different diameters so as to have different transmission ratios are attached to the rear axle 16 so as to be integrally rotatable, a large diameter gear 18 and a small diameter gear 1.
two interlocking pieces 2 which are fitted externally so as to be relatively rotatable in a state in which they are respectively engaged with the transmission shafts 9, and which releasably interlock the speed change transmission gears 14 and 15 with the transmission shaft 13;
0a, 20b are slidably provided in the speed change transmission gears 14, 15 so as to transmit the rotational force of the transmission shaft 13 to the rear wheel 16, and the interlocking pieces 20a,
20b is selectively engaged with the transmission gear 14 or 15, and the transmission speed is changed into two high and low stages.
前記変速装置６の操作構造について説明すれ
ば、前記連動片２０ａ，２０ｂを摺動操作する変
速操作軸２１を、前記ミツシヨンケース１０に貫
設すると共に前記伝動軸１３に摺動自在に内嵌さ
せ、そして、前記連動片２０ａ，２０ｂを、前記
伝動軸１３に一体回転自在に係合するように前記
伝動軸１３の軸芯方向に形成の長孔１３Ａ，１３
Ｂに挿通させると共に、前記連動片２０ａ，２０
ｂを、前記変速操作軸２１の摺動により前記連動
片２０ａ，２０ｂが摺動操作されて変速伝動ギア
１４又は１５に択一的に係合するように前記変速
操作軸２１の周溝部２１ａに係合させることによ
つて、変速操作軸２１と連動片２０ａ，２０ｂを
一体摺動させて伝動軸１３と変速伝動ギア１４又
は１５を連動させるようにしてある。そして、前
記変速操作軸２１は第４図に示す操作レバー２２
に連動させてあり、この操作レバー２２を機体横
巾方向に操作することにより変速操作軸２１を伝
動軸１３に対して摺動させて連動片２０ａ，２０
ｂを変速伝動ギア１４又は１５に係合させるよう
にしてある。 To explain the operation structure of the transmission device 6, a transmission operation shaft 21 for slidingly operating the interlocking pieces 20a and 20b is provided through the transmission case 10 and is slidably fitted inside the transmission shaft 13. and elongated holes 13A, 13 formed in the axial direction of the transmission shaft 13 so that the interlocking pieces 20a, 20b can be engaged with the transmission shaft 13 so as to be able to rotate integrally with the transmission shaft 13.
B, and the interlocking pieces 20a, 20
b into the circumferential groove portion 21a of the speed change operation shaft 21 so that the interlocking pieces 20a, 20b are slidably operated by sliding of the speed change operation shaft 21 and selectively engage with the speed change transmission gear 14 or 15. By engaging them, the speed change operation shaft 21 and the interlocking pieces 20a, 20b are slid together, and the transmission shaft 13 and the speed change transmission gear 14 or 15 are interlocked. The speed change operation shaft 21 is connected to an operation lever 22 shown in FIG.
By operating this operation lever 22 in the width direction of the aircraft body, the speed change operation shaft 21 is slid with respect to the transmission shaft 13, and the interlocking pieces 20a, 20
b is engaged with the transmission gear 14 or 15.
前記連動片２０ａ，２０ｂは、第３図に示すよ
うに、前記変速操作軸２１の軸芯方向での長さＬ
が前記変速操作軸２１の周方向での長さＷより大
であるように形成されており、連動片２０ａ，２
０ｂが変速伝動ギア１４又は１５に係合する際に
こじれが発生することを抑制すると共に、連動片
２０ａ，２０ｂの摺動が円滑に行えるようにして
ある。 As shown in FIG. 3, the interlocking pieces 20a, 20b have a length L in the axial direction of the speed change operation shaft 21.
is larger than the length W in the circumferential direction of the speed change operation shaft 21, and the interlocking pieces 20a, 2
This suppresses the occurrence of twisting when the gear 0b engages with the transmission gear 14 or 15, and allows the interlocking pieces 20a, 20b to slide smoothly.
尚、図中１７は、変速操作軸２１を所定の変速
操作位置で位置保持させるためのボールデテント
である。 In addition, 17 in the figure is a ball detent for holding the shift operation shaft 21 at a predetermined shift operation position.
前記実施例では、変速伝動ギア１４，１５を２
個設けたが、３個以上設けて、３段以上に変速で
きるようにしてもよい。
In the embodiment described above, the speed change transmission gears 14 and 15 are
Although three or more gears are provided, three or more gears may be provided so that the gears can be shifted to three or more stages.
又、前記実施例では、連動片２０ａ，２０ｂを
２個設けたが、１個あるいは３個以上設けてもよ
い。 Further, in the above embodiment, two interlocking pieces 20a and 20b are provided, but one or three or more interlocking pieces may be provided.
さらに、前記実施例では、連動片２０ａ，２０
ｂに対する変速伝動ギア１４，１５夫々の係合部
をギア１４又は１５夫々に４個ずつ備えさせた
が、２個あるいは６個以上でもよい。 Furthermore, in the embodiment, the interlocking pieces 20a, 20
Although each of gears 14 and 15 is provided with four engaging portions for transmission gears 14 and 15, two or six or more engaging portions may be provided.
本考案は歩行型芝刈機に適用できる他、変速装
置６を備える各種の作業機に適用できる。 The present invention can be applied not only to walk-behind lawn mowers but also to various working machines equipped with a transmission 6.
図面は本考案に係る変速装置の実施例を示し、
第１図はミツシヨンケースの断面図、第２図は第
１図における−線断面図、第３図は連動片の
斜視図、第４図は歩行型芝刈機の側面図である。
１３……伝動軸、１３Ａ，１３Ｂ……長孔、１
４，１５……変速伝動ギア、２０ａ，２０ｂ……
連動片、２１……変速操作軸、２１ａ……周溝
部、Ｌ……軸芯方向長さ、Ｗ……周方向長さ。
The drawings show an embodiment of the transmission device according to the present invention,
FIG. 1 is a sectional view of the transmission case, FIG. 2 is a sectional view taken along the line -- in FIG. 1, FIG. 3 is a perspective view of the interlocking piece, and FIG. 4 is a side view of the walk-behind lawn mower. 13...Transmission shaft, 13A, 13B...Long hole, 1
4, 15... Speed transmission gear, 20a, 20b...
Interlocking piece, 21... Speed change operation shaft, 21a... Circumferential groove portion, L... Length in the axial direction, W... Length in the circumferential direction.
Claims (1)
５を１本の伝動軸１３に相対回転自在に外嵌し、
前記伝動軸１３の内部に、軸芯方向に沿つて軸内
挿用の空間部を形成し、この空間部に対して、前
記伝動軸１３の一端側から、前記複数の変速伝動
ギア１４，１５を前記伝動軸１３に対して択一的
に係合連結させるスライド操作用の変速操作軸２
１をスライド自在に内嵌した変速装置において、
前記変速操作軸２１と前記変速伝動ギア１４又は
１５とを、変速操作軸２１に対して、変速操作軸
２１の周溝部２１ａを介して相対回転自在に装着
され、且つ、伝動軸１３の軸芯方向に沿つて形成
されている長孔１３Ａ，１３Ｂから突出する状態
に位置させた連動片２０ａ，２０ｂを介して係合
連結可能に構成し、さらに、その連動片２０ａ，
２０ｂを、前記変速操作軸２１の軸芯方向での長
さＬが前記変速操作軸２１の周方向での長さＷよ
り大であるように形成してある変速装置。 Multiple transmission gears 14, 1 with different transmission ratios
5 is externally fitted onto one transmission shaft 13 so as to be relatively rotatable,
A space for shaft insertion is formed inside the transmission shaft 13 along the axial direction, and the plurality of transmission gears 14 and 15 are inserted into the space from one end of the transmission shaft 13. A speed change operation shaft 2 for sliding operation that selectively engages and connects the transmission shaft 13 to the transmission shaft 13.
In a transmission device in which 1 is slidably inserted,
The speed change operation shaft 21 and the speed change transmission gear 14 or 15 are relatively rotatably mounted to the speed change operation shaft 21 via the circumferential groove portion 21a of the speed change operation shaft 21, and the axis of the transmission shaft 13 is The interlocking pieces 20a, 20b are configured to be able to be engaged and connected via the interlocking pieces 20a, 20b positioned to protrude from the elongated holes 13A, 13B formed along the direction, and the interlocking pieces 20a,
20b is formed such that the length L of the shift operation shaft 21 in the axial direction is larger than the length W of the shift operation shaft 21 in the circumferential direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1986077301U JPH0517506Y2 (en) | 1986-05-22 | 1986-05-22 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1986077301U JPH0517506Y2 (en) | 1986-05-22 | 1986-05-22 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62188650U JPS62188650U (en) | 1987-12-01 |
| JPH0517506Y2 true JPH0517506Y2 (en) | 1993-05-11 |
Family
ID=30925175
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1986077301U Expired - Lifetime JPH0517506Y2 (en) | 1986-05-22 | 1986-05-22 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0517506Y2 (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4942534U (en) * | 1972-07-19 | 1974-04-15 |
-
1986
- 1986-05-22 JP JP1986077301U patent/JPH0517506Y2/ja not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4942534U (en) * | 1972-07-19 | 1974-04-15 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62188650U (en) | 1987-12-01 |
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