JP2008286380A

JP2008286380A - Differential of three-wheel vehicle

Info

Publication number: JP2008286380A
Application number: JP2007158036A
Authority: JP
Inventors: Kiyoshi Obata; 潔小幡
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-05-21
Filing date: 2007-05-21
Publication date: 2008-11-27

Abstract

<P>PROBLEM TO BE SOLVED: To provide a differential inexpensive and easy to handle, to smoothly turn by using a spur gear inexpensive and mass-producible, in place of a bevel gear. <P>SOLUTION: The differential usually uses the bevel gear. However, the bevel gear is not productive as compared with the spur gear in manufacturing, and twice or three times as expensive as the spur gear. When the spur gear is adopted, material cost is low and machining is easy. As a method for achieving this, two spur gears 3a, 3b coupled with wheel shafts inside two bowl-shaped housings, and two planetary spur gears 4a, 5a of two shafts held by the housings are respectively meshed to drive the housing. Thereby, the differential of which a structure is simple, which is inexpensive and is easy to handle, can be achieved. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

本発明は三輪車等の後二輪を駆動して走行する乗物に関する物である。 The present invention relates to a vehicle that travels by driving rear two wheels such as a tricycle.

Technical background

従来の差動装置は概ね傘型歯車を使用して差動装置を構成しているが、傘型歯車は高価で量産に向かなく、製品高となり、扱い難い。 Conventional differential gears generally use a bevel gear, but the differential gear is expensive, unsuitable for mass production, has a high product, and is difficult to handle.

本発明は傘型歯車に替えて安価で量産の可能な平歯車を使って差動装置を実現しようとするものである。・ The present invention intends to realize a differential gear using a spur gear that can be mass-produced at low cost instead of a bevel gear.・

Means to solve the problem

向かい合わせの椀型の二個のハウジングの内部で、車輪軸に結着の２個の大きい平歯車に２個の軸を持つ平遊星ピニオンをそれぞれ噛み合わせ、又、そのピニオン同士もかみ合わせてピニオンの二本の軸をハウジングにて支持して、ハウジングの回転を前記ピニオンを介して車輪軸に回転を伝えて、差動装置を構成する。Two planetary pinions with two shafts meshed with two large spur gears attached to the wheel shaft, and two pinions meshed with each other, and the pinions are also meshed with each other. These two shafts are supported by the housing, and the rotation of the housing is transmitted to the wheel shaft through the pinion to constitute a differential device.

以後ピニオンを遊星歯車と称すThe pinion is hereinafter referred to as planetary gear

以下図によって説明する。図１は本発明を三輪自転車に装着した図で１ａ、１ｂはハウジング、１ｃはハウジングを廻すギヤー、２ａ，２ｂは車輪軸、１０ａ，１０ｂは車輪、１１は、ペダル１２の回転をハウジング１ｃ、に伝えるチェーン。This will be described below with reference to the drawings. FIG. 1 shows the present invention mounted on a three-wheeled bicycle. 1a, 1b are housings, 1c are gears that rotate the housing, 2a, 2b are wheel shafts, 10a, 10b are wheels, 11 is the rotation of the pedal 12 in the housing 1c, Chain to tell.

図２、図３、は本発明の外観図で１ａ，１ｂはハウジング、１ｃ、はハウジング１ｂと一体の回転受けのギヤー、２ａ、２ｂは左、右車輪軸、４ｃ，５ｃは遊星歯車４ａ，５ａの軸、７ａ，７ｂは軸４ｃの支持穴、８ａ，８ｂは軸５ｃの支持穴、９は、１ａ，１ｂ，を貫くノックピン、６_１、６_２、６_３，６_４は１ａ，１ｂ、を結着のボルトである2 and 3 are external views of the present invention. Reference numerals 1a and 1b are housings, 1c are gears that are integral with the housing 1b, 2a and 2b are left and right wheel shafts, and 4c and 5c are planetary gears 4a, 5a shaft, 7a and 7b are support holes for the shaft 4c, 8a and 8b are support holes for the shaft 5c, 9 is a knock pin passing through 1a and 1b, 6 ₁ , 6 ₂ , 6 ₃ and 6 ₄ are 1a and 1b. The binding bolt is

図４は本発明を軸方向から見た図で、ハウジング内部の歯車の配置を示す、図５は内部構造を説明の為、図４のＡ−Ａ′でハウジング１ａ，１ｂ、だけを割いた図である。図５に於いて、３ａは、車軸２ａと結合の平歯車、３ｂは、車軸２ｂと結合の平歯車、４ａは遊星歯車、４ｂはスペーサー、４ｃは４ａ，４ｂの軸である。FIG. 4 is a view of the present invention viewed from the axial direction, and shows the arrangement of gears inside the housing. FIG. 5 is a diagram illustrating only the housings 1a and 1b in FIG. FIG. In FIG. 5, 3a is a spur gear coupled to the axle 2a, 3b is a spur gear coupled to the axle 2b, 4a is a planetary gear, 4b is a spacer, 4c is a shaft of 4a and 4b.

５ａは遊星歯車、５ｂはスペーサー、５ｃは５ａ，５ｂの軸である。４ａは一端が平大歯車３ａと噛み合い５ａは一端が平大歯車３ｂと噛み合い、且つ、４ａと５ａが他端で互いに噛み合う位置に、軸４ｃ，５ｃがあり、ハウジング１ａ，１ｂ，の支持穴７ａ７ｂ，８ａ、８ｂが軸４ｃ、５ｃの両端末を支持する。5a is a planetary gear, 5b is a spacer, and 5c is a shaft of 5a and 5b. 4a has one end meshed with the large gear 3a, one end meshed with the large gear 3b, and 4a and 5a have shafts 4c and 5c at positions where the other end meshes with each other, and support holes for the housings 1a and 1b. 7a7b, 8a and 8b support both ends of the shafts 4c and 5c.

図６は遊星歯車４ａ，５ａが上部に位置する時の、軸方向から見た図である。図７は図６のＢ−Ｂ′でハウジングだけを割いた図で，歯車３ａ，３ｂに結着の２ａ，２ｂ，の軸が向き合って夫々突き出て、３ａ，３ｂの間に隙間を形成して、遊星歯車４ａ，５ａの噛み合いの場を作る。又４ｂ，５ｂ、は４ａ，５ａが軸方向に所定位置で噛み合う為のスペーサーである、FIG. 6 is a view seen from the axial direction when the planetary gears 4a and 5a are located at the upper part. FIG. 7 is a view in which only the housing is divided by BB ′ in FIG. 6. The shafts 2a and 2b of the binding are opposed to the gears 3a and 3b and protrude from each other to form a gap between 3a and 3b. Thus, a meshing place for the planetary gears 4a and 5a is created. 4b and 5b are spacers for engaging 4a and 5a at predetermined positions in the axial direction.

次に作用について説明する。ベルト１１に依って１ｃを回転すると、直進の場合、ハウジング１ａ，１ｂ、が回転して軸４ｃ，５ｃがそれについて廻り、その回転が遊星歯車４ａ，５ａを介して車輪軸２ａ，２ｂの歯車３ａ，３ｂを同時に廻し、車輪１０ａ，１０ｂが同じ回転をする。Next, the operation will be described. When 1c is rotated by the belt 11, in the case of going straight, the housings 1a and 1b rotate to rotate the shafts 4c and 5c, and the rotation of the gears of the wheel shafts 2a and 2b via the planetary gears 4a and 5a. 3a and 3b are simultaneously rotated, and the wheels 10a and 10b rotate in the same manner.

今、仮りに車輪１０ｂ側に旋回すると１０ｂが減速し、歯車３ｂが減速するので遊星歯車５ａはハウジングによって強制的に引き回され、３ｂ上を転がりながら回転を起こし、その回転を遊星歯車４ａに伝える。４ａは回転しながら転がり、回転を歯車３ａに伝達して、３ａは増速する。これに依り車輪１０ａは１０ｂの減速分回転が早まり、いわゆる差動効果が生ずる。Now, if it turns to the wheel 10b side, 10b will decelerate and the gear 3b will decelerate, so that the planetary gear 5a is forcibly drawn by the housing, and rotates while rolling on 3b, and the rotation is transferred to the planetary gear 4a. Tell. 4a rolls while rotating, the rotation is transmitted to the gear 3a, and 3a speeds up. As a result, the wheel 10a rotates faster by the deceleration of 10b, and a so-called differential effect occurs.

反対に、車輪１０ａが減速の場合も前記と同様な作用で逆の差動が生じて、１０ｂは１０ａの減速分増速する。又、極端な例として、一方の車輪が停止の時は、反対側の車輪は回転受けギヤー１ｃの回転の二倍の回転をする。On the other hand, when the wheel 10a is decelerated, a reverse differential is generated by the same operation as described above, and 10b is accelerated by the deceleration of 10a. As an extreme example, when one of the wheels is stopped, the opposite wheel rotates twice the rotation of the rotation receiving gear 1c.

The invention's effect

平歯車は傘型歯車に比べて製作費が安く、又、車輪軸、遊星歯車軸が平行であるのでハウジングの軸受け加工が容易である。従って平型歯車を採用する事は自転車のような小動力車にとっては、構造簡単で、軸が交錯して加工費が嵩み価格が高い傘型歯車に比べて製作費が安くなり有利であるThe spur gear is less expensive to manufacture than the bevel gear and the wheel shaft and the planetary gear shaft are parallel so that the housing can be easily machined. Therefore, the adoption of a flat gear is advantageous for a small power vehicle such as a bicycle because the structure is simple, the shafts are crossed, the processing cost is high, and the manufacturing cost is lower than that of the expensive bevel gear.

BEST MODE FOR CARRYING OUT THE INVENTION

以下本発明の実施の形態を図２〜７に基ついて説明するHereinafter, embodiments of the present invention will be described with reference to FIGS.

椀型の底に当たる部が軸受けのハウジングに、軸端を少々突き出した平歯車３ａ，３ｂを固着した軸２ａ，２ｂ，を１ａ，１ｂの軸受けに通し、ハウジングを向かい合わせる。３ａ，３ｂ間は車軸が突出しているので図７に見る如く間隔が生ずる。軸４ｃ，５ｃは長型の遊星歯車４ａ，５ａ、とスペーサー４ｂ，５ｂの夫々通し軸となる。The shaft 2a, 2b, to which the spur gears 3a, 3b protruding slightly from the shaft end are passed through the bearings of the bearings 1a, 1b, and the housings face each other. Since the axle protrudes between 3a and 3b, an interval is generated as seen in FIG. The shafts 4c and 5c are through shafts for the long planetary gears 4a and 5a and the spacers 4b and 5b, respectively.

而して４ａは３ａと、５ａは３ｂと噛み合わせ且つ３ａ，３ｂの間隙で４ａ，５ａを噛み合わせて軸４ｃ，５ｃの両端はハウジング１ａ，１ｂの支持穴７ａ７ｂ，８ａ８ｂに固定する。その際４ｂと５ｂは４ａが３ｂに、５ａが３ａに触れない様互い違いに４ａ，４ｂと共に４ｃ，５ｃに取り付ける。Thus, 4a meshes with 3a and 5a meshes with 3b, and meshes 4a and 5a with a gap between 3a and 3b, and both ends of shafts 4c and 5c are fixed to support holes 7a7b and 8a8b of housings 1a and 1b. At that time, 4b and 5b are alternately attached to 4c and 5c together with 4a and 4b so that 4a does not touch 3b and 5a does not touch 3a.

９のノックピンは４ｃ、５ｃを正しい位置に保持し、１ａ，１ｂを合わせ組み立てる時のガイドと、使用中１ａ，１ｂがずれて、歯車同士の噛み合いの不調のを防止する重要な役目を持つ。No. 9's knock pin holds 4c and 5c in the correct position, and has an important role of preventing the gears 1a and 1b from slipping out of alignment with the guide when assembling and assembling 1a and 1b.

本発明の差動装置を装着の三輪車の外観図External view of a tricycle equipped with the differential of the present invention 本発明の軸に直角の視図View perpendicular to the axis of the present invention 、本発明の軸方向より見る図The figure seen from the axial direction of the present invention 本発明の内部構造図Internal structure diagram of the present invention 本発明のハウジングだけをＡ−Ａ′で割いた図The figure which divided only the housing of this invention by AA ' 図４を９０度右に回転した図Figure 4 rotated 90 degrees to the right 図６のハウジングだけをＢ−Ｂ′で割いた図Fig. 6 shows only the housing of Fig. 6 divided by BB '.

Explanation of symbols

１ａハウジング（左）
１ｂハウジング（右）
１ｃ駆動受けギヤー
２ａ車軸（左）
２ｂ車軸（右）
３ａ車軸平歯車（左）
３ｂ車軸平歯車（右）
４ａ遊星平歯車
４ｂスペーサー
４ｃ軸
５ａ遊星平歯車
５ｂスペーサー
５ｃ軸
６_１締め付けボルト
６_２締め付けボルト
６_３締め付けボルト
６_４締め付けボルト
７ａ軸取り付け穴
７ｂ軸取り付け穴
８ａ軸取り付け穴
８ｂ軸取り付け穴
１０ａ車輪（左）
１０ｂ車輪（右）
１１動力伝達チェーン
１２足こぎペダル1a Housing (Left)
1b Housing (right)
1c Drive receiving gear 2a Axle (left)
2b Axle (right)
3a Axle spur gear (left)
3b Axle spur gear (right)
4a planetary spur gear 4b spacer 4c shaft 5a planetary spur gear 5b spacer 5c shaft 6 ₁ tightening bolt 6 ₂ tightening bolt 6 ₃ tightening bolt 6 ₄ tightening bolt 7a shaft mounting hole 7b shaft mounting hole 8a shaft mounting hole 8b shaft mounting hole 10a wheel (left)
10b Wheel (right)
11 Power transmission chain 12 Foot pedal

Claims

Two shaft-shaped housings having a spur gear at one end are housed in two housings having a bearing at the bottom, and the shafts are passed through the housing, with a space between the two gears. Facing each other, the two shaft spur gears are engaged with one end of each of the two long pinions, and the other end of both pinions is engaged with each other in a gap facing the spur gear. A differential device characterized in that both ends of the pinion shaft are held in both housings, the housings are coupled, and rotation from the passive gear of the housing is transmitted to the spur gear with the shaft through the pinion.

A differential device for preventing a shift of a planetary gear shaft by providing a knock pin in the mating and coupling housing according to claim 1.

A three-wheeled bicycle equipped with the differential according to claim 1