CN1216237C

CN1216237C - Wheel train with low-hardness elastic gear and power device using the same

Info

Publication number: CN1216237C
Application number: CN 01110647
Authority: CN
Inventors: 毛启明
Original assignee: Individual
Current assignee: Individual
Priority date: 2001-04-13
Filing date: 2001-04-13
Publication date: 2005-08-24
Anticipated expiration: 2021-04-13
Also published as: CN1380504A

Abstract

The present invention discloses a gear train with low-hardness elastic gears and a power device using the gear train; the gear train has a plurality of spur gears meshing with each other, the gears include low-hardness elastic gears and high-hardness gears, and the high-hardness gears mesh with the low-hardness elastic gears; the power device using the gear train includes spur gears installed on the rotating shaft of the motor and other gears meshing with the gears, and the meshing of the gears is the meshing of the low-hardness elastic gears and the high-hardness gears. The gear train and the power device have the advantages of simple manufacturing, low cost, low vibration, low noise, low heat generation and simple structure.

Description

Have the train of low hardness resislient gear and use the power plant of this train

The present invention relates to a kind of train, particularly a kind of train with low hardness resislient gear, and use this to have the power plant of low hardness resislient gear train.

Higher hardness (HB value 〉=150) gear that train commonly used is now made based on metallic material, more common wheel is the straight toothed spur gear transmission, when being meshing with each other because of straight toothed spur gear, the instantaneous contact line of two-wheeled flank profil curved surface is the straight line with parallel axes, in the engagement driving process, the a pair of gear teeth enter engagement simultaneously and withdraw from engagement along the whole facewidth, thereby suffered load suddenly adds and lays down on the gear teeth.Make that the transmission stability of straight toothed spur gear mechanism is relatively poor, be easy to generate bigger impact, vibration and noise, produce more heat transfer thereupon, especially in the higher transmission of speed, above-mentioned phenomenon is more serious, must the additional cycles lubricating and cooling; For addressing the above problem, people begin to adopt cylindrical helical gear drive, the flank of tooth Line of contact of helical gear is skew lines, a pair of tooth progresses into engagement, withdraws from engagement gradually, and load suffered on the gear teeth is also ascending gradually, descending again, this way of contact, make that the helical gear mechanism driving is more steady, the impact that is produced, vibration and noise are all less, and be less because of vibrating the heat that produces.But the complex manufacturing technology of angular gear, cost height; Again since the gear teeth be tilted in transmission the time can produce axial force, Gu its supporting structure must adopt thrust bearing, this all causes the complexity and the higher cost of angular gear train general structure; Have gear-driven power plant now owing to adopted said structure, also have the problems referred to above.

The objective of the invention is to overcome above-mentioned defective, provide a kind of working process simple, cost is low, vibrates for a short time, and noise is little, the vibration heating less, the train with low hardness resislient gear simple in structure and use the power plant of this train.

For achieving the above object, the present invention adopts following technological scheme: (1) this train with low hardness resislient gear comprises a plurality of straight toothed spur gears that are meshing with each other together, comprise low hardness resislient gear and high hardness gear in the above-mentioned straight toothed spur gear, high hardness gear and low hardness resislient gear are meshing with each other; High hardness gear HB value 〉=150 wherein, low hardness resislient gear 95 〉=HB value 〉=55.(2) use the power plant of this train: comprise motor and together a plurality of straight toothed spur gears of being meshing with each other, a straight toothed spur gear is installed on the rotatingshaft of motor; Comprise low hardness resislient gear and high hardness gear in the said gear, high hardness gear and low hardness resislient gear are meshing with each other; High hardness gear HB value 〉=150 wherein, low hardness resislient gear 95 〉=HB value 〉=55.

Owing to comprised the low hardness resislient gear in above-mentioned train, low hardness resislient gear and high hardness gear are meshing with each other, and low hardness resislient gear (is example with rubber) manufacture process is simple, and cost is low, and hardness number is adjusted easily.Because the Young's modulus of low hardness resislient gear is less, use the low hardness resislient gear again, can alleviate owing to make and the caused negative consequence of inaccuracy is installed, as the noise that reduces to vibrate and produce because of vibration, the heat that produces because of vibration.Therefore use the power plant of this train, it is simple also to have manufacture process, and cost is low, vibrates for a short time, and noise is little, few advantage of generating heat.

Below in conjunction with accompanying drawing and enforcement the present invention is had the train of low hardness resislient gear and uses the power plant of this train to be described further.

Fig. 1 has embodiment's the structural representation of the train of low hardness resislient gear for the present invention

Fig. 2 uses the structural representation of the power plant with low hardness resislient gear train for the present invention

This train with low hardness resislient gear comprises a plurality of straight toothed spur gears that are meshing with each other together, comprising low hardness resislient gear and high hardness gear, high hardness gear and low hardness resislient gear are meshing with each other, high hardness resislient gear HB value 〉=150 wherein, low hardness resislient gear 95 〉=HB value 〉=55.High hardness gear and low hardness resislient gear are involute gear, for realizing the continuous rotation of involute gear, should guarantee that intermeshing two gear base pitch equate that the gravity treatment coefficient is greater than 1; In order to make said gear mechanism realize positive and negative both direction transmission, reduce the both sides flank profil in transmission process and the bump between the other side's flank profil, also when making driving gear change sense of rotation, driven gear can be immediately backward rotation thereupon, should make above-mentioned high hardness gear and low hardness resislient gear be no sideshake engagement, promptly when said gear is meshing with each other, the between cog on pitch circle equals the transverse tooth thickness on another pitch circle.As shown in Figure 1, train with above-mentioned technical characteristics can be an epicyclic gear train, and wherein central gear 3 is the high hardness gear, and planet wheel 2 is the low hardness resislient gear, the movement characteristic of epicyclic gear train is can obtain very big velocity ratio with a few gear, but the efficient of this train is often very low, is unsuitable for to be used for transferring power, only can be used for the transmission of movement under the underload, as shown in Figure 1, planet wheel 2 has three, and these three planet wheels 2 are uniformly distributed in outside the central gear 3, and meshes with central gear 3; With circular gear ring 1 of engagement in these three planet wheels 2, can make the internal action power of this epicyclic gear train obtain balance like this.Indication low hardness resislient gear can be that rubber is made in the above-mentioned technical characteristics, because can answering the output power size, the hardness of low hardness gear adjusts, when if outputting torsion needs greatly, hardness can increase, otherwise can reduce, the increase and decrease of hardness can reach by the Chemical composition that changes in the rubber, the hardness of adjusting rubber to the technician that does rubber than being easier to.

This use has the power plant of low hardness resislient gear train, comprise motor and a plurality of straight toothed spur gears that are meshing with each other together, a straight toothed spur gear is installed on the rotatingshaft of motor, comprise low hardness resislient gear and high hardness gear in above-mentioned a plurality of straight toothed spur gear, high hardness gear and low hardness resislient gear are meshing with each other, high hardness gear HB value 〉=150 wherein, low hardness resislient gear 95 〉=HB value 〉=55.As shown in Figure 2, the above-mentioned a plurality of straight toothed spur gears that are meshing with each other together can be epicyclic gear train, wherein central gear 3 is one, it is the high hardness gear, this high hardness gear 3 is installed on the rotatingshaft 12 of motor 11, planet wheel 2 is the low hardness resislient gear, planet wheel 2 is three, the basic circle of these three planet wheels 2 equates, the number of teeth is identical, with annular tooth ring 1 of engagement in these three planet wheels 2, the contact ratio of annular tooth ring 1 and three planet wheels 2 is bigger, stable drive, the rotatingshaft 15 of three planet wheels 2 is fixed on a side of a round turntable 4, relative side at round turntable 4 is equipped with a straight toothed spur gear 17, this gear 17 is high hardness gears, and gear 17 is to exist as the outputting power wheel that this use has power plant of low hardness resislient gear train, and what be meshed with gear 17 can also have other epicyclic gear train shown in Figure 2; For the power plant that make above-mentioned use have low hardness resislient gear train are realized positive and negative both direction transmission, reduce the both sides flank profil in transmission process and the bump between the other side's flank profil, when making driving gear change sense of rotation, driven gear can be immediately backward rotation thereupon, should make central gear 3 and planet wheel 2, planet wheel 2 meshes for no sideshake with circular gear ring 1, and central gear 3, planet wheel 2 are involute gear.Above-mentioned low hardness resislient gear is advisable with the rubber gear.

Claims

1. A gear train with low-hardness elastic gears, comprising a plurality of spur gears meshed together, the above-mentioned gears include low-hardness elastic gears and high-hardness gears, high-hardness gears mesh with low-hardness elastic gears, high Hardness gear HB value ≥ 150, characterized in that: the low hardness gear is a rubber gear, rubber gear 95 ≥ HB value ≥ 55.

2. The gear train with low-hardness elastic gears according to claim 1, characterized in that: the high-hardness gear and the low-hardness elastic gear are involute gears, and the base joints of the two gears meshing with each other are equal and overlapping The coefficient is greater than 1.

3. The gear train with low-hardness elastic gears according to claim 1, characterized in that: the high-hardness gears and the low-hardness elastic gears mesh without backlash, and when the above-mentioned gears mesh with each other, a pitch circle of one gear The pitch between the teeth is equal to the tooth thickness on the pitch circle of the other gear.

4. The gear train with low-hardness elastic gears according to claim 1 or 2, characterized in that: the multiple gears meshed together are epicyclic gear trains, wherein the central gear is a high-hardness gear, and the planetary gear is Low hardness elastic gear.

5. A power device using a low-hardness elastic gear train, comprising a motor and a plurality of spur gears meshing with each other, a spur gear is installed on the rotating shaft of the motor, and the gear includes a low Hardness elastic gears and high-hardness gears, high-hardness gears and low-hardness gears meshing with each other, wherein the HB value of the high-hardness gears is ≥ 150, characterized in that the low-hardness gears are rubber gears, and the rubber gears are 95 ≥ HB value ≥ 55 .

6. The power device using a low-hardness elastic gear train according to claim 5, wherein the plurality of gears meshed with each other are epicyclic gear trains, wherein the center wheel is a high-hardness gear, which is installed On the rotating shaft of the motor; the planetary gear is a low-hardness elastic gear.

7. The power device using a low-hardness elastic gear train according to claim 6, characterized in that: the epicyclic gear train has one center wheel and three planetary gears, and the base of the three planetary gears is The circles are equal, the number of teeth is the same, and a ring gear is meshed with the three planetary gears; the rotation shafts of the three planetary gears are fixed on one side of a circular turntable, and a spur gear is installed on the opposite side of the circular turntable .

8. The power device using a low-hardness elastic gear train according to claim 7, characterized in that: the center wheel and the planetary wheel, and the planetary wheel and the circular ring gear are meshed without backlash, and the central theory, The planetary gears are involute gears.