CN2193087Y

CN2193087Y - Angle regulator for chair

Info

Publication number: CN2193087Y
Application number: CN 94213191
Authority: CN
Inventors: 黄天森; 黄剑波; 陶巍
Original assignee: No610-Inst China Aeronaustics Industrial General Corp
Current assignee: Zhonghang Lifesaving Sci-Tech Co., Ltd., Hubei
Priority date: 1994-05-26
Filing date: 1994-05-26
Publication date: 1995-03-29
Anticipated expiration: 2004-05-26

Abstract

The utility model provides an angle regulator for chairs, which is formed by taking advantage of the principle of the rotation of a planetary wheel with few teeth differences. The outer side of the planetary wheel is provided with two inner gears which are oppositely arranged, one external gear of the planetary wheel is engaged with the inner gear which is positioned at one side, and the other outer gear of the planetary wheel is engaged with the inner gear which is positioned at the other side; the numbers of teeth of the inner gear and the planetary wheel are different, and shaft centers of the inner gear and the planetary wheel are provided with one eccentric shaft which is provided with a hand wheel. The utility model overcomes the disadvantage that the chair backs rock from front to back for a long time; the utility model has the advantages that the comfortability is strong, the utility model can carry out stepless regulation within 0 to 180 DEG, angles can be easily and freely regulated, force can be uniformly exerted on tooth surfaces, the property of resisting impact is favorable, and the utility model has the function of independently locking.

Description

Angle regulator for chair

The utility model is a kind of seat angle adjustment, is used for the angular adjustment of automotive seat or other seat.

At present the angle demodulator of automotive seat is the vitals on the car seat, and it relates to the technical indicator of all " man-machine loop systems engineerings " such as the intensity of seat, safe, comfortable, collision, impact, antivibration, wear-resisting, Human Physiology requirements.Current international angle demodulator has developed into the stage that the non-general technology of complex structure can be processed.This service quality and be worth is not only confirmed by each prestige car manufacturer in the world but also has been put into acceptance criteria.And the angle demodulator that now all kinds of seat adopted in the various motor vehicles of China mainly is made up of the chair back installing plate that a sector rack, ratchet retaining mechanism and positioning cam, handle and sector gear connect.Armrest handle double-linked cam is opened ratchet locking and is made the sector rack can freely-movable during work, and close handle and cam are with regard to stuck sector rack locking angle.Be used for from making, chair angle can freely be adjusted, though governing speed is fast, impact resistance is poor, and comfortableness is poor, rock big, adjustable range is little, generally can not be greater than 90 °, and can not carry out step-less adjustment; Secondly, can't reach tight engagement between tooth and the tooth, cause micro-free gap between tooth plate, and the defective of rocking before and after the backup plate appears, moreover the intensity of crown is low, can't satisfy impact strength requirement, more can't reach the seat overall performance that generally adopts in the world, can't meet international standards thereby influenced China's automotive seat quality to angle demodulator.

The purpose of this utility model is to provide that a kind of seat stability is good, angle of regulation range is big, and anti-impact force is strong, and angular adjustment is free and relaxed and the chair angle stepless regulator of lock function is voluntarily arranged.

The technical solution of the utility model is utilized fewer differential teeth planetary wheel transmission principle and is designed.The utility model comprises two internal gears, planetary gear, eccentric shaft, steel ball, sheath, handwheel, backrest installing plate and seat support installation base plate.Planetary gear is made of two overlapping pinions.The planetary gear outside has two relatively and the internal gear of dress, pinion on the planetary gear and the engagement of the internal gear of a side, the internal gear engagement of another pinion and opposite side, the number of teeth of two internal gears, planetary gear is all inequality, and also the number of teeth with two internal gears is few for the number of teeth of middle planetary gear.In the axle center of internal gear, planetary gear one eccentric shaft is arranged, handwheel is housed on the eccentric shaft, two internal gear outsides are connected with the parts that need are regulated respectively.

Eccentric shaft is a power shaft, since its rotation and the restriction of internal gear, planet crop rotation plane motion.Planetary gear is not only done the circumference translational motion around the axis of internal gear fixed-site, but also does gyration around self axis.Because the wobbler action of eccentric shaft makes planetary gear make circular motion when meshing with internal gear, according to same principle, planetary gear again with the engagement of adjacent internal gear, because the number of teeth difference effect of each meshing gear, thereby drive internal tooth crop rotation slow rotation, and then drive the angle adjustment that the chair back is realized seat by the chair back installing plate that is attached thereto; This kind of drive has the function of lock adjustment angle voluntarily.After adjusting angle finished, it is motionless that eccentric shaft withstands on a certain fixing position with planetary gear, promptly can not do the circumference translational motion around the fixing axis of internal gear again, also just internal gear is locked on the position of fixing and can not moves.At this moment, internal gear is subjected to can not to rotate from the external force effect of the chair back again, thereby has realized the angle locking effect.

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is Fig. 1 side view;

Fig. 3 is the strength of gear schematic diagram.

Below in conjunction with accompanying drawing the utility model is described in further detail:

Among Fig. 1, planetary gear 2 is made of two overlapping little external gears, planetary gear 2 outsides have two relatively and the internal gear of dress, internal gear 1 is meshed with a little external gear 2-1 of planetary gear, internal gear 4 is meshed with another little external gear 2-2 of planetary gear, internal gear 1 has 25 teeth, little external gear 2-1 has 24 teeth, internal gear 4 has 20 teeth, little external gear 2-2 has 19 teeth, internal gear 1,4 and the axle center of planet axis 2 are eccentric shafts 3, between eccentric shaft 3 and the planetary gear, one circle steel ball 5 is respectively arranged between internal gear 4 and outer cover,, reduce the frictional force between each part to reduce contact-making surface, making can be free and relaxed when regulating, sheath 6 is with internal gear 1,4, planetary gear 2, eccentric shaft 3 and steel ball 5 connect firmly and are integral, and the outside of internal gear 1 is connected with seat chair basin installing plate 7, internal gear 4 is installed base plate 9 with the chair back and is connected, and eccentric shaft 2 is connected with adjusting handle 8.

Among Fig. 2,1 is internal gear, and 2 is planetary gear, and 3 is eccentric shaft, and 5 is steel ball, and 6 is sheath, and 7 is chair basin installing plate, and 9 is chair back installing plate.

Among Fig. 3,1 is internal gear, 2 is planetary gear, 3 is eccentric shaft, after angle modulation finishes, seat support gusset piece and chair back gusset piece are in certain angle, when Chair back stressed, when promptly internal gear 4 is subjected to torsional interaction in Fig. 1, be delivered to the planetary gear 2 that is engaged with, make planetary gear be subjected to the effect of moment of torsion M, shown in the contact point A as shown in Figure 3, this moment, internal gear 1 was fixed, be the axis hole matching relationship between planetary gear 2 and the eccentric shaft 3, so eccentric shaft 3 is not subjected to the effect of M, the power F that transmitted by planetary gear in B point sensing axle center, F power can not make eccentric shaft 3 rotate, so eccentric shaft can not rotate around the axle center, thereby withstand planetary gear in position, make it to rotate, realized that angle locks voluntarily with 1 engagement of fixing internal gear.

During use, regulating handle 8 rotates eccentric shaft 3, drive planetary gear 2 and internal gear 1 engagement running, internal gear 1 is fixed, thereby be 19 pinion 2-2 and internal gear 4 engagements by the overlapping number of teeth, drive internal gear 4 runnings, because the number of teeth difference of each gear, internal gear 4 is little by little promoted, and rotates around the axle center; Drive chair back installing plate 9 rotations that internal gear 4 connects, realized the angular adjustment of the chair back.On adjusting handle 8, only need apply each different parts that a very little power just can governor motion and execute commentaries on classics.

The utility model compared with prior art comfortableness is strong, has overcome the shortcoming of rocking before and after the Chair back for a long time, and chair back peak is super with respect to the swing of the turning cylinder of angle demodulator Cross 3mm, enlarged angle of regulation range, can in 0～180 ° of scope, carry out step-less adjustment, angular adjustment is free and relaxed, only need apply the following power of 04Nm, just can realize the adjusting of angle, the flank of tooth is stressed evenly, anti-impact force is strong, can resist the impulsive force of 5000Nm, and has increased the self-locked function.

Claims

1, a kind of seat angle adjustment is characterized in that: the outside of the planetary gear (2) that is made of two overlapping external gears has two relatively and internal gear (1), (4) of dress; An external gear (2-1) of planetary gear (2) and internal gear (1) engagement, another gear (2-2) of planetary gear (2) and internal gear (4) engagement; The number of teeth of internal gear (1), planetary gear (2), internal gear (4) is all inequality; There is an eccentric shaft (3) in axle center at internal gear (1), (4) and planetary gear (2), and handwheel (8) is arranged on the eccentric shaft (3); The outside of internal gear (1), (4) is connected with the parts that need are regulated respectively.

2, as the said angle demodulator of claim 1, it is characterized in that the number of teeth difference of internal gear (1), (4), the number of teeth of two internal gears of the gear ratio of planetary gear (2) (1), (4) is few.

3,, it is characterized in that between eccentric shaft (3) and the planetary gear (2), a circle steel ball (5) respectively arranged between internal gear (4) and the outer cover as claim 1,2 said angle demodulators.

4, as claim 1,2 described angle demodulators, it is characterized in that: sheath (6) connects firmly internal gear (1), (4), planetary gear (2), eccentric shaft (3) and steel ball (5) and is integral.