1. A kind of parallel teeth slide the stepless speed change device, characterized by that: including ring gear mounting disc, ring gear combination, output shaft, driving gear, encoder and control system, the ring gear combination is fixed on the ring gear mounting disc, and the ring gear combination is formed by a plurality of ring gear combinations, is equipped with the clearance between the ring gear, be equipped with one to a plurality of speed change point on the ring gear, the tooth that the ring gear is located the position of speed change point is parallel teeth, and the tooth's socket that the ring gear is located the parallel teeth of same speed change point position is on same straight line.

2. A parallel-teeth sliding continuously variable transmission as claimed in claim 1, wherein: when the tooth space center line of the parallel teeth at the speed change point is consistent with the axial direction of the output shaft, the driving gear can perform position switching between the adjacent gear rings.

3. A parallel-teeth sliding continuously variable transmission as claimed in claim 1, wherein: the parameters of the teeth on all the gear rings are the same.

4. A parallel-teeth sliding continuously variable transmission as claimed in claim 1, wherein: all gear rings are located on the same plane, and the thickness of the gear rings is the same.

5. A parallel-teeth sliding continuously variable transmission as claimed in claim 1, wherein: the gear rings are all circular.

6. A parallel-teeth sliding continuously variable transmission as claimed in claim 1, wherein: the number of the speed change points is set according to the size of the gear ring, the density of the teeth and parameters; in the same case, the larger the ring gear, the higher the tooth density, and the more shift points are formed between the ring gears.

7. A parallel-teeth sliding continuously variable transmission as claimed in claim 1, wherein: the encoder is provided with an encoder shaft, the encoder shaft is connected with the center of the gear mounting disc, and the encoder detects the rotating position of the gear mounting disc.

Background

The stepless speed change is one of automatic transmission type speed change boxes, and refers to a speed change system capable of continuously obtaining any transmission ratio in a speed change range. The best match of the drive train to the engine's operating conditions can be obtained by stepless speed change. Common continuously variable transmissions are hydromechanical and metal belt continuously variable transmissions (VDT-CVT) and variable ramp type continuously variable transmissions.

The traditional Continuously Variable Transmission (CVT) is based on a main light cone disc/disc, a slave disc moves on a main disc surface to change a transmission ratio (the main disc is changed), but force transmission is friction force, a switching range is wide, switching time for realizing speed change is relatively long, so that the CVT is small in stability, the realized initial torque is small, and the use cost is high, so that the existing speed change needs cannot be met. Therefore, a new type of continuously variable transmission needs to be developed to meet the requirements of production and use.

Disclosure of Invention

The invention aims to solve the technical problem of providing a parallel-tooth sliding stepless speed change device which is convenient to use, simple to operate, convenient to switch gears among gear rings, good in flexibility, capable of quickly realizing adjustment of gear ratio and practical and wide in application.

In order to solve the problems, the invention adopts the following technical scheme:

the utility model provides a parallel teeth slip infinitely variable device, includes ring gear mounting disc, ring gear combination, output shaft, driving gear, encoder and control system, and the ring gear combination is fixed on the ring gear mounting disc, and the ring gear combination is formed by a plurality of ring gear combinations, is equipped with the clearance between the ring gear, be equipped with one to a plurality of variable speed point on the ring gear, the tooth that the ring gear is located the variable speed point position is parallel teeth, and the tooth's socket that the ring gear is located the parallel teeth of same variable speed point position is on same straight line.

Preferably, the drive gear is capable of switching the position between the adjacent ring gears when the tooth space center line of the parallel teeth at the speed change point coincides with the axial direction of the output shaft.

This arrangement facilitates movement of the drive gear on the ring gear to effect a change in the gear ratio.

Preferably, the parameters of the teeth on all the gear rings are the same.

The arrangement ensures the consistency and stability of the output ratio or the transmission ratio.

Preferably, all the gear rings are located on the same plane, and the thickness of the gear rings is the same.

This setting has guaranteed that the driving gear switches in the position on the coplanar, can not receive the interference among the switching process.

Preferably, the gear rings are all circular.

The arrangement realizes different transmission ratios and realizes stepless speed change.

Preferably, the number of the speed change points is set according to the size of the gear ring, the density of the teeth and parameters; in the same case, the larger the ring gear, the higher the tooth density, and the more shift points are formed between the ring gears.

This setting is convenient for carry out the setting of how much of variable speed point according to the actual use condition.

Preferably, the encoder is provided with an encoder shaft, the encoder shaft is connected with the center of the gear mounting disc, and the encoder detects the rotation position of the gear mounting disc.

This setting detects the position of parallel tooth through the effect of encoder, guarantees the accurate of driving gear and inserts and the transform of position.

The invention has the beneficial effects that:

1. the structure is simple, the operation is convenient, and the use cost is low;

2. the switching is flexible, and different transmission ratios can be realized;

3. the installation is convenient, and the application range is wide;

4. and no clutch switching is performed in the switching process, and the power is not interrupted.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, but the present invention is not limited to the scope of the present invention.

FIG. 1 is a schematic view of a ring gear assembly of the present invention;

FIG. 2 is a schematic view of the shift point position of the present invention;

FIG. 3 is a schematic structural view of the present invention;

FIG. 4 is a schematic diagram of the principles of the present invention;

FIG. 5 is a schematic view of the present invention in use;

FIG. 6 is a schematic view of the tooth slot position of the present invention;

the synchronous motor comprises a gear ring mounting disc 1, a gear ring I2, a gear ring II 3, a gear ring III 4, a gear ring IV 5, a gear ring IV 6, a speed change point I7, a speed change point II 8, an output shaft 9, a driving gear 10, an encoder 11, an encoder shaft 11, a transmission motor 12, a servo motor 13, a screw rod 14, a sliding table 15, a synchronous belt 16, a guide rod 17, a tooth groove 18 and a bracket 19.

Detailed Description

Referring to fig. 1 to 6, the parallel-tooth sliding stepless speed change device includes a gear ring mounting plate 1, a gear ring combination, an output shaft 8, a driving gear 9, an encoder 10 and a control system, wherein the gear ring combination is fixed on the gear ring mounting plate 1, the gear ring combination is formed by combining a plurality of gear rings, a gap is arranged between the gear rings, one or more speed change points are arranged on the gear rings, teeth of the gear rings at the positions of the speed change points are parallel teeth, and tooth grooves of the parallel teeth at the positions of the same speed change point are on the same straight line.

Further, when the tooth space center line of the parallel teeth at the speed change point is in axial agreement with the output shaft, the driving gear can be switched in position between the adjacent gear rings.

Further, the parameters of the teeth on all the gear rings are the same.

Further, all the gear rings are located on the same plane, and the thickness of the gear rings is the same.

Further, the ring gears are all circular.

Further, the number of the speed change points is set according to the size of the gear ring, the density of the teeth and parameters; in the same case, the larger the ring gear, the higher the tooth density, and the more shift points are formed between the ring gears.

Further, an encoder shaft 11 is arranged on the encoder 10, the encoder shaft 11 is connected with the center of the gear mounting disc 1, and the encoder detects the rotating position of the gear mounting disc.

The first embodiment is as follows: with reference to fig. 1 to 6, a servo motor 13, a screw rod 14, a sliding table 15 and a guide rod 17 are mounted on a bracket 19, the sliding table 15 is fixed on the screw rod 14 and the guide rod 17, and one end of the screw rod is connected with the servo motor; meanwhile, a transmission motor 12 is arranged on the sliding table, a synchronous wheel is arranged on an output shaft, the synchronous wheel is connected with the transmission motor through a synchronous belt 16, the transmission motor drives the output shaft to rotate through the synchronous belt, and the output shaft drives a driving gear to rotate; in this case, the number of the ring gears is set to four, namely a ring gear one 2, a ring gear two 3, a ring gear three 4 and a ring gear four 5, the width of the ring gear one 2, the ring gear two 3, the ring gear three 4 and the ring gear four 5 is set to 1cm, the interval between the ring gears is set to 0.1cm, and when the circumference of the ring gear one is determined to be 2 × pi 9.5 — 59.66cm, the transmission circumferences of the ring gear two 3, the ring gear three 4 and the ring gear four 5 which are sequentially realized are as follows:

2*π*8.4＝52.752cm；

2*π*7.3＝45.844cm；

2*π*6.2＝38.936cm；

the transmission ratio of the first gear ring to the fourth gear ring is realized as follows: 1: 1.53; two speed change points, namely a speed change point I6 and a speed change point II 7, appear on the gear rings I to IV; at the moment, the teeth of the gear ring I2, the gear ring II 3, the gear ring III 4 and the gear ring IV 5 which are positioned at the first speed change point 6 and the second speed change point 7 are parallel teeth, and tooth grooves 18 of the parallel teeth are on the same straight line; when the central lines of the parallel tooth spaces 18 of the first gear ring 2, the second gear ring 3, the third gear ring 4 and the fourth gear ring 5 are axially positioned on the same vertical plane with the output shaft 8, the driving gear 9 completes gear ring position switching among the first gear ring 2, the second gear ring 3, the third gear ring 4 and the fourth gear ring 5.

When the transmission gear is required to be changed, the driving gear is switched to the second gear ring from the first gear ring if required; the encoder detects the rotating position of the gear mounting disc, when the tooth space center line of the parallel teeth of the gear ring combination is consistent with the axial direction of the output shaft, the servo motor controls the screw rod to rotate, the screw rod drives the sliding table to move for 1.1cm, and meanwhile, the driving gear moves from the tooth space where the parallel teeth of the first gear ring are located to the tooth space where the parallel teeth of the second gear ring are located; therefore, the switching of the driving gear between different gear rings is completed, and the stepless speed change is realized.

In the implementation process, the encoder is responsible for checking the rotation angle of the disc, when the parallel teeth are detected, a signal is sent to the control system, the control system initiates a signal to drive the servo motor to execute 1.1cm displacement (the movement is rapid, otherwise, the tooth punching is also caused), and meanwhile, the gear of the driving gear can be meshed with the gear ring of the current ring and the gear of the next ring simultaneously in the switching process so as to achieve clutch-free switching and uninterrupted power.

In the first embodiment:

the parameters of the first gear ring 2, the second gear ring 3, the third gear ring 4 and the fourth gear ring 5 are the same, the number of teeth is reduced in sequence, the second gear ring 3 is arranged on the inner side of the first gear ring 2, the third gear ring 4 is arranged on the inner side of the second gear ring 3, and the fourth gear ring 5 is arranged on the inner side of the third gear ring 4;

the first gear ring 2, the second gear ring 3, the third gear ring 4 and the fourth gear ring 5 are located on the same plane, and the thicknesses of the gear rings are the same.

The first gear ring 2, the second gear ring 3, the third gear ring 4 and the fourth gear ring 5 are all circular.

The gear ring I2, the gear ring II 3, the gear ring III 4 and the gear ring IV 5 are fixed on the gear ring mounting disc in a fixing mode through screws, bolts and the like.

The tooth number of the driving gear can be changed according to the actual use condition.

The thickness of the gear ring is as follows: the height of any gear ring vertical to the gear ring mounting plate.

The width of the gear ring is as follows: the distance between the inner ring and the outer ring of any gear ring.

The above is only a specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that are not thought of through the inventive work should be included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope defined by the claims.