A shock-resistant flexible connection structure of a planetary gearbox
A planetary gearbox and flexible connection technology, applied in belts/chains/gears, transmission boxes, components with teeth, etc., can solve problems such as structural strength not meeting requirements, bolt breakage, breaking, etc., to meet design requirements, Ease of replacement of parts and cost reduction
Active Publication Date: 2016-12-28
XIANGTAN UNIV
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Problems solved by technology
However, under the impact load, the structural strength designed according to the equivalent load method cannot meet the requirements, so it is necessary to improve the structure of the gearbox to improve its impact resistance
A shock-resistant flexible connection structure of a planetary gearbox is proposed, which can effectively solve the phenomenon of bolt fracture in the partial flexible connection box and tooth breakage in the partial rigid connection box under impact load
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[0011] Such as figure 1 , figure 2 , image 3 As shown, a single-stage planetary gear box impact-resistant flexible connection structure, the inner gear box 10 adopts a separate type, and is divided into an upper box 1, an inner gear 4 and a lower box 6, and the upper box 1, the inner gear There are bolt holes 7 on the ring 4 and the lower box 6, and the bolts 2 installed in the bolt holes 7 connect the upper box 1, the inner ring gear 4 and the lower box 6; the sun gear 9, the planetary gear 8 and the inner gear The ring 4 meshes, and there are pin holes 3 on the upper case 1, the inner gear 4 and the lower case 6, and two elastic cotter pins 5 are respectively installed on the upper case 1 and the inner gear 4, the inner gear 4 and the In the pin hole 3 of the lower box body 6.
[0012] Under normal working conditions, when the planetary gear train is running, the teeth of the inner ring gear are subjected to circumferential tangential force and radial force, and the fri...
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The invention discloses a shock-resistant flexible connecting structure of a planetary gear box. A box body of the structure is separated; a planetary inner gear ring is connected with an upper box body and a lower box body through bolts; the lower box body is fixed; and two elastic split pins are respectively arranged in a pin hole for connecting the upper box body and the inner gear ring, and a pin hole for connecting the inner gear ring and the lower box body. The bolts are pre-tightened, and certain primary contact positive pressure is formed on a contact surface between the upper box body and the inner gear ring, and a contact surface between the lower box body and the inner gear ring. Under a normal working condition, the friction force provided by the bolt pre-tightening force overcomes an external load, and the inner gear ring does not slide. Under the action of the impact load, the frictional resistance generated by the positive pressure is not enough to balance the tangential force of the inner gear ring, and flexible buffer generated during sliding of the inner gear ring can prevent gear teeth from breaking. The pre-tightening force of the bolts, the number of the elastic split pins and the flexibility of a thickness control structure are adjusted to prevent the inner gear ring from sliding excessively and guarantee the strength of the bolts.
Description
technical field [0001] The invention relates to an impact-resistant flexible connection structure of an inner ring gear box of a planetary gearbox. Background technique [0002] Planetary gear transmission is an important transmission form, which has many advantages that general gear transmission does not have, such as compact structure, large transmission ratio, high efficiency and strong load capacity, etc., thus gradually replacing the previous ordinary gear transmission and widely used It is used in machinery manufacturing, aerospace, wind power, automobile and ship and other fields. In the field of aviation, the last stage of the main reducer of the helicopter is almost all in the form of planetary gear transmission. [0003] The load conditions of the planetary gearbox are complex and the magnitude changes greatly. If the planetary gearbox is designed according to the peak load, the structure will be bulky, the strength will be surplus, and the manufacturing cost will...
Claims
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IPC IPC(8): F16H57/02F16H57/023F16H57/08
Inventor 谭援强胡聪芳巩招兵杨世平刘金刚
Owner XIANGTAN UNIV