CN202451713U

CN202451713U - Automobile seat angle adjusting reduction gearbox

Info

Publication number: CN202451713U
Application number: CN201120546174XU
Authority: CN
Inventors: 童庆; 张润高; 胡增来; 卢贺; 王瑞茂
Original assignee: Faurecia Shanghai Management Co Ltd
Current assignee: Faurecia China Holding Co Ltd
Priority date: 2011-12-23
Filing date: 2011-12-23
Publication date: 2012-09-26
Anticipated expiration: 2021-12-23

Abstract

The utility model aims to provide an automobile seat angle adjusting reduction gearbox, which has the characteristic of compact structure. According to the automobile seat angle adjusting reduction gearbox, a worm wheel is provided with a worm wheel eccentric shaft, wherein the worm wheel eccentric shaft is connected with a dual planet gear; the dual planet gear can freely rotate on the worm wheel eccentric shaft and is provided with a first planet gear and a second planet gear; the first planet gear is engaged with a first inner gear, and the second planet gear is engaged with a second inner gear to form a planet gear transmission mechanism; an output gear is provided with an output shaft sleeve; the output shaft sleeve is inserted into a shaft hole of the worm wheel eccentric shaft; the worm wheel eccentric shaft can freely rotate in the output shaft sleeve; the eccentric distance of the eccentric shaft is the center distance of the planet gear transmission mechanism; and the number of teeth of the first inner gear is different from the number of teeth of the second inner gear, and the number of teeth of the first planet gear is different from the number of teeth of the second planet gear, so that the planet gear transmission mechanism is a planet gear transmission mechanism with small difference.

Description

Automotive seat angle modulation speed reducer

Technical field

The utility model relates to a kind of gear reducer.

Background technique

Motor vehicle seat back angle modulation structure deceleration system, general pivotal connection by worm screw and motor.Realize the deceleration of the first order through the worm and gear transmission of the first order; Outer gearing transmission through small gear and gearwheel realizes partial deceleration again; Such angle modulation final controlling element speed reducer is simple in structure; But receive the gear space layout restrictions, can't volume be reduced, can't realize the light-weighted design requirement of automotive seat; Simultaneously owing to general external gear transmission is difficult to make big speed ratio, so be difficult to realize the design usage requirement of large speed ratio.Be difficult to realize the high rotating speed of motor, the designing requirement of low weight.

The model utility content

The purpose of the utility model is to provide a kind of automotive seat angle modulation speed reducer, and it has the characteristics of compact structure.

For realizing the automotive seat angle modulation speed reducer of said purpose, comprise worm gear, worm screw, output gear, speed reducer housing and gear box cover, the worm and wheel engagement; Be characterized in, also comprise compound planet gear, output gear is first internal gear; Speed reducer housing inboard fixedly installs secondary annulus, and worm gear has the worm gear eccentric shaft, accepts compound planet gear on the worm gear eccentric shaft; Compound planet gear can freely rotate on the worm gear eccentric shaft, and compound planet gear has first planetary pinion and second planetary pinion, first planetary pinion and the engagement of first internal gear; Second planetary pinion and secondary annulus engagement, thus constitute planetary gear mechanism, and output gear has output sleeve; Output sleeve is inserted in the axis hole of worm gear eccentric shaft; The worm gear eccentric shaft can carry out freely rotating at output sleeve, and the throw of eccentric of this eccentric shaft is the centre distance of planetary gear mechanism, and first internal gear is different with the number of teeth of secondary annulus; First planetary pinion is different with the second planetary number of teeth, thereby said planetary gear mechanism is a planetary pinion transmission few tooth difference transmission mechanism.

The utility model constitutes the first order through worm and worm gear and slows down; Constitute the second level with small teeth number difference planet gear mechanism and slow down, output gear links to each other with the angle regulating device for seat of vehicle connecting rod and fetches the backrest angle adjusting that realizes automotive seat, and it has utilized conventional turbine worm screw speed ratio big; Transmit advantage stably; Simultaneously utilized small teeth number difference planet gear systems communicate speed ratio big again, the characteristics that output torque is big are arranged through the same axial direction of each assembly of gear train; Thereby compact structure has been saved the arrangement space of a large amount of gear trains.

Description of drawings

Fig. 1 is the decomposition view of automotive seat angle modulation speed reducer.

Fig. 2 is the plan view of automotive seat angle modulation speed reducer.

Fig. 3 is the sectional drawing along G-O-G line among Fig. 2.

Embodiment

As shown in Figure 1, automotive seat angle modulation speed reducer comprises worm screw 8, worm gear 7, compound planet gear 5, output gear 3, speed reducer housing 2 and gear box cover 1.

Output gear 3, speed reducer housing 2 and gear box cover 1 are fixed on the same axis 9.One side of worm gear 7 is extended with worm gear eccentric shaft 71; Compound planet gear 5 is accepted by worm gear eccentric shaft 71; And compound planet gear 5 can freely rotate on worm gear eccentric shaft 71, the throw of eccentric of worm gear eccentric shaft 71 with after the centre distance of the planetary gear mechanism stated equate.One side of output gear 3 has output sleeve 31.Worm gear eccentric shaft 71 has axis hole, and this axis hole runs through the center of worm gear 7, and output sleeve 31 is inserted in the axis hole of worm gear eccentric shaft 71, and to accept worm gear 7, worm gear 7 can freely rotate on output sleeve 31.Output sleeve 31 is fixedly connected on the axle 9.First planetary pinion 51 of compound planet gear 5 and output gear 3 (output gear 3 is an internal gear) engagement; Second planetary pinion 52 meshes with speed reducer housing 2 inboard internal gears 21 simultaneously; Thereby the formation planetary gear mechanism, the number of teeth of

planetary pinion

51,52 is different, and the number of teeth of two internal gears 3 is also different; Therefore planetary gear mechanism can provide big output torque according to the few tooth difference principle work of planetary pinion transmission.

During work; Moment of torsion is delivered to worm gear 7 from worm screw 8, and the worm gear eccentric shaft 71 from worm gear 7 is delivered to compound planet gear 5 again, compound planet gear 5 rotations on worm gear eccentric shaft 71 on the one hand; Revolve round the sun around axle 9 on the other hand; Thereby transfer torque to output gear 3, output gear 3 is delivered to angle-modulator with moment of torsion through axle 9, and angle-modulator can directly be connected with axle 9 profiles.

In order to reduce wear, between the axis hole of compound planet gear 5 and the worm gear eccentric shaft 71 copper sheathing 10 can be set.

In the preferred embodiment of the utility model, worm screw 8 can be directly as the pto of motor.Internal gear 21 also can be formed directly into speed reducer housing 2 inboards.

Claims

1. automotive seat angle modulation speed reducer comprises worm gear, worm screw, output gear, speed reducer housing and gear box cover, the worm and wheel engagement; It is characterized in that, also comprise compound planet gear, output gear is first internal gear; Speed reducer housing inboard fixedly installs secondary annulus, and worm gear has the worm gear eccentric shaft, accepts compound planet gear on the worm gear eccentric shaft; Compound planet gear can freely rotate on the worm gear eccentric shaft, and compound planet gear has first planetary pinion and second planetary pinion, first planetary pinion and the engagement of first internal gear; Second planetary pinion and secondary annulus engagement, thus constitute planetary gear mechanism, and output gear has output sleeve; Output sleeve is inserted in the axis hole of worm gear eccentric shaft; The worm gear eccentric shaft can carry out freely rotating at output sleeve, and the throw of eccentric of this eccentric shaft is the centre distance of planetary gear mechanism, and first internal gear is different with the number of teeth of secondary annulus; First planetary pinion is different with the second planetary number of teeth, thereby said planetary gear mechanism is a planetary pinion transmission few tooth difference transmission mechanism.