Coaxial shaft-and-planetary transmission

FIELD: transport engineering; vehicle transmissions.

SUBSTANCE: in proposed coaxial shaft-and-planetary transmission gear 10 on primary shaft 2 is secured and is in meshing with gear 7 provided with rim of increased width and freely fitted on intermediate shaft 6. Gear 11 of secondary shaft 3 has also rim of increased width near gear rim of gear 10 of primary shaft 2. shifter sleeve member 24 fitted on said gear rims is coupled with other sleeve member 25 by shifter fork 26, sleeve member 25 being installed on gear rims of gears 7 and 8 of intermediate shaft 6. Gear rim 19 of output shaft of carrier 15 is two-position one. Gear rim 20 of output shaft of set 5 is three-position one, and shifter sleeve 28 on said rim is provided with three internal gear rims. Gear rim 31 with internal and external meshing is teeth rigidly secured on slider 30 of shifter sleeve 28, external meshing teeth being coupled with three-position gear rim 23 of housing of set 1.

EFFECT: increased range of gear ratios of shaft reduction gear at reduced overall dimensions and metal usage, improved gear shift mechanism of planetary mechanism.

2 dwg

 

The invention relates to the transport industry, in particular to transmission vehicles.

Known transmission units with speed change gear ratios, containing gears, shafts, bearings, gear used on domestic and foreign cars. (Vehicles: Design, construction and calculation. Transmission. Ed. Aigrettes. Mn.: Enter. HQ., 1985. - 240 S.)

These units are structurally complex, massive.

Closest to the proposed transmission (gearbox) is KP for patent RU 2217325 C1 (bull. No. 33 dated 27.11.2003).

The transmission includes a housing unit in which there are three coaxial gearbox with three pairs of vzaimozachetnykh gear external gear, the gear on the primary and secondary shafts installed freely between them are two clutch gear, the gear on the intermediate shaft are combined in a block, the output of the reducer is a simple three planetary gear with planet carrier, satellites, epicycle wheel and a sun gear mounted on the secondary shaft, primary, secondary shaft of the gearbox output shaft carrier and output shaft Assembly are aligned, the body is three-shaft gear, a tubular shaft carrier and the housing epicycle wheel are near the advantage is these sprockets case epicycle wheel on the other hand, the output shaft carrier and output shaft Assembly are adjacent sprockets on the ring gear of the output shaft Assembly is installed, the clutch switch, which has two internal gear it with a fork switch and a slider movably interconnected with the clutch switch, having two internal ring gear mounted on the ring gear gear case.

Described KP simpler model structures of the transmission units given in the book, provides a sufficient range of gear ratios (the ratio of the gear ratio in a lower gear to a higher), but has limited performance capabilities due to the increased size of the gear freely mounted on the primary shaft, which limits the value of the gear ratio engaged, difficult shifting when changing direction of movement, as between the sub-bands, reverse and low gear is a subrange of the highest gear, the complicated design of the clutch switch, stopping drove or epicycle wheel relative to the housing.

The problem to which the invention is directed, is to expand the operational capabilities of the vehicle while simplifying the design and reducing the metalloemkost transmission Assembly.

The problem is solved due to the achievement of the technical result consists in increasing the range of the gear ratio shaft of the gearbox by reducing its size and metal, the improvement of the gear of the planetary mechanism.

This technical result is achieved by coaxially valvoplasty transmission includes a housing unit in which there are three coaxial gearbox with three pairs of vzaimozachetnykh gear outer gear, the two gears on the intermediate shaft are combined in a block, gears on the secondary shaft of the gearbox is installed freely between them is a clutch gear, the output gear is a simple three planetary gear with planet carrier, satellites, epicycle wheel and a sun gear mounted on the secondary shaft, primary, secondary shaft of the gearbox output shaft carrier and output shaft Assembly are aligned, drove and case epicycle wheel have adjacent sprockets tubular shaft housing epicycle wheel, an output shaft carrier and output shaft Assembly are adjacent sprockets on the ring gear of the output shaft Assembly is installed, the clutch switch, which plug switching vzaimosvaz is on the slide, gear on the primary shaft is fixed, it is engaged with the gear, with gear extended, loosely mounted on the intermediate shaft, the gear output shaft also has a gear extended next to a ring gear of the primary gear shaft, these toothed crowns is the coupling gear interconnected with a fork switch with another coupling half mounted on the toothed crowns of the intermediate gear shaft, gear output shaft drove off, gear output shaft Assembly position, the clutch switch on the crown has three internal gear on the slide clutch switch is rigidly fixed gear with internal and external toothing, the external toothing of which is connected with the three-position ring gear housing of the planetary mechanism.

Gear freely mounted on the primary shaft, had an increased diameter, it limited the range of the gear ratio shaft of the gearbox, increased volume and intensity due to growth center distances. The planetary mechanism (PM) gearbox prototype provided three modes, but not in the optimal mode, when switching from low gear into reverse it is necessary to pass through the position of the higher gear; desperatley gear needed two coupling a movable connection between them.

The proposed solution allows to reduce size and metal shaft of the gearbox by combining gear with the primary shaft, to simplify the gear through the use of the ring gear with internal and external toothing instead of the clutch switch and implement three modes of the PM to the optimal mode switching gears: I-Uhab=- ; II-Ubah=To+1; III-U(bh)=1 when setting the dip of the ring gear of the output shaft carrier and the three-position of the ring gear and output shaft Assembly.

Figure 1 shows a diagram KP, figure 2 - radial chart and table position clutch switch at different speeds forward (top) and reverse (bottom).

Vertical beam corresponds to the transmission number equal to one. The greater the tilt of the beam, the higher the value of the gear ratio. In logarithmic scale, the slope of the beam is constant on any part of the radiation diagram. Rays of pairs of external gears gearing marked I, II, III, and rays characterizing the modes of operation of the planetary mechanism, - U=1,0; Ubahand Uhab.

In support of the unit's casing 1 are coaxially arranged input shaft 2, the output shaft 3, the output shaft carrier 4 and the output shaft Assembly 5. In parallel, they installed the intermediate shaft 6, on which oterom freely mounted gear 7 and is fixed to the gear train external gearing 8 and 9. These gears are vzaimozachety respectively with gears external gearing 10, 11 and 12, the gear 10 is fixed on the primary shaft 2 (made at the same time with him), gears 11 and 12 are freely mounted on the secondary shaft 3. On the secondary shaft 3 fixed sun gear 13, which is geared with satellites 14, mounted on the axes of the carrier 15 and meshed with epicycle wheel 16. The tubular shaft 17 case epicycle wheel 16 is connected with constitutive ring gear 18. On the output shaft drove a 4 next to the ring gear 18 mounted two-position crown gear 19. On the output shaft of the unit 5, near the toothed rims 18 and 19 fixed three-position crown gear 20. On the outer surface of the shell epicycle wheel 16 is crown gear 21. Next to the ring gear 21 is ring gear 22 of the carrier 15. Three-position crown gear 23 fixed to the body unit 1 opposite the gear rims 21 and 22. Clutch switch (A) consists of two coupling halves 24 and 25 connected by a fork switch 26, they are installed respectively between the gears 10-11 and 7-8. The clutch 27 (C) is installed on the hub of the output shaft 3 between the gears 11 and 12. The coupler (S) 28 is located on the ring gear 20 of the output shaft Assembly 5. Plug switch 29 slide 30 movably connected to the clutch switch 28 at the inner end of the slide is 30 fixed gear 31 with internal and external links.

The work of the KP as follows:

The first transmission

Clutch switch As In(27) are in the right position (P) - (see figure 2, table top right), clutch switch (28) is in the middle position (II). In this case (see figure 1) coupling And the coupling 25 connects the gear 7 gear 8 of the intermediate shaft 6, the coupling 24 is located on the toothed crown gear 11 and the output shaft 3 and not connect it with the primary shaft 2, the clutch connects the gear 12 with the secondary shaft 3, the clutch (28) connect (see figure 1 bottom right) ring gear 19 of the output shaft carrier 4 with a ring gear 20 of the output shaft of the unit 5, the fork switch 29, the slider 30 and the ring gear 31 connects the ring gear 23 of the housing unit 1 with a ring gear 21 and stops epicycle wheel 16 (b) relative to the body unit 1. The planetary mechanism (PM) is the mode with the ratio Ubah=K+1. The upper symbol indicates that stopped link - b, lower characters on the links login (sun gear) and output (h - drove) of torque, an internal parameter PM is equal to the ratio of numbers of teeth of the epicycle wheel and sun gear - for the radiation diagram variants PM it is equal to 3, and the gear ratio GR is 4.

Torque from the primary shaft 2 gear 10 is transmitted to the sixth is Erny 7 (a pair of gears (I) the coupling 25 on the toothed crown gear 8 and the intermediate shaft 6, the gear 9 on the gear 12 (a pair of gears III). From the gear 12 by the coupling switch In (27) the torque is transmitted to the output shaft 3 and the sun gear 13. The sun gear 13 rotates the satellites 14, which objetivas stopped by the epicycle wheel 16, and transmit the increased torque on the carrier 15, the output shaft carrier 4, the gear 19, the clutch switch With (28), ring gear 20 and the output shaft Assembly 5.

Radiation diagram of this transfer correspond to the three series-connected beam: t to medium scale left (see figure 2) beam I go down to the right, then the beam III right up and then the gentle beam (Ubab=To+1) to 1 on the right side of the scale.

A second pass

Move the clutch And in the left position, a pair of gears I turned off from work, because the coupling 25 divides the gears 7 and 8, includes a pair of gears II.

Torque from the primary shaft 2 is transmitted to the coupling 24 to the gear 11, next to the gear 8, then, as on a previous pass. Radiation diagram of this transfer also correspond to the three beam, but instead of I beam presents the beam II.

Third gear

Change the position of the clutches and clutch And returns to the position corresponding to the first gear and the clutch connects with the secondary shaft 3 gear 11.

To the intermediate gear shaft torque PE udaetsya, as in first gear, then a pair of gears II (8-11), the coupling 27 on the output shaft 3, then, as in the previous transmission.

Radiation diagram of this transfer correspond to rays I, II and Ubahdirected from t to v.3.

The fourth transfer

Move the clutch And to the left position, both clutches are connected with the gear 11.

Torque from the primary shaft 2 is transmitted to the output shaft 3 directly on the coupling 24, the gear 11 and the clutch 27, and then, as in the previous transmission.

Radiation diagram of this transfer corresponds to one ray Ubahdirected from t to v.4.

The fifth transmission

Return couplings a and b in the state corresponding to the first transmission, and clutch to be moved to position III. Crown gear 31 extends from a connection with a ring gear 21 of the housing epicycle wheel 16 is in the off position, the clutch 28 left and middle inner crowns connects the right side of the ring gear 19 of the carrier 15 with a ring gear 18 epicycle wheel 16. For a fixed connection relative to each other of the two links in PM he blocked all three segments rotate with the same frequency. This condition PM on radiation diagram shows the vertical rays - U=1,0.

Torque to PM is transmitted as the first transmission, then directly via PM and then jagged veins of the AMI 18 and 19, clutch switch 28 on the ring gear 20 and the output shaft Assembly 5.

Radiation diagram this transmission is represented by three rays: two first beam I and III correspond to the first gear and the third beam is directed vertically upwards to V.5.

The sixth transmission

Switchable coupling And to the left position.

Torque to PM is passed as the second gear, and then - as the previous one.

Radiation diagram of this transfer correspond to rays II, III and U=1,0.

The seventh transmission

Change the position of the couplings a and b in the position of the third transmission.

To PM the torque is transmitted, as in third gear, then - as in the last two gears. Radiation diagram of the I beam tilted to the right, down and rays II and U=1,0 characterize this transfer.

The eighth transmission - direct

Move the clutch And left.

To PM the torque is transmitted, as in fourth gear, then as in the last three transmission.

Radiation diagram this transmission is represented by one vertical beam U=1,0 from t to 8.

Reverse gears are provided with the PM when switching the clutch in position I - gear 31 from the clutch connects the ring gear 22 of the carrier 15 with the ring gear 23 of the housing unit 1 and stops the carrier sleeve 28 secondary ring gear (see figure 1 top right) connects the ring gear 18 epicycle what about the wheels 16 with the ring gear 20 of the output shaft Assembly 5. PM works in mode Uhab=-To, a sun gear 13 satellites 14, mounted on the axis is stopped drove 15, slowly rotates the epicycle wheel 16 and the output shaft Assembly 5 in the opposite direction.

The first back - 1R

Install couplings a and b in the position of the first gear and the clutch is in position I (see figure 2, below right).

To PM the torque is transmitted, as in the first forward gear, then from the sun gear 13 satellites 14 on the epicycle wheel 16, then through the tubular shaft 17, a toothed crown 18, the clutch 28, a toothed crown 20 to the output shaft of the unit 5.

Radiation diagram, the reverse gear is represented by three rays: I, III, and Uhab=-From t to .1R.

The second back - 2R

Switchable coupling And to the left position.

Torque to PM is passed as the second forward gear, then, as on a previous pass.

Radiation diagram of this transfer correspond to the three beam: II, III, and Uhab=-K.

The third back - 3R

Change the position of the clutches a and B.

Until PM torque is supplied as the third forward gear, then, as in the last two gears.

Radiation chart, the three beams I, II and Uhab=-To characterize this transfer.

The fourth is the first back - 4R

Move the clutch And to the left position.

To PM the torque is transmitted directly, as in the fourth forward gear, then, as on the last transmission.

Gentle beam Uhab=-From t to T.4R is this transfer.

When you change the settings of the external gears of the gearing and PM distribution transmission and skew rays will also change.

Coaxial spread-planetary transmission, comprising a housing unit in which there are three coaxial gearbox with three pairs of vzaimozachetnykh gear outer gear, the two gears on the intermediate shaft are combined in a block, gears on the secondary shaft of the gearbox is installed freely between them is a clutch gear, the output gear is a simple three planetary gear with planet carrier, satellites, epicycle wheel and a sun gear mounted on the secondary shaft, primary, secondary shaft of the gearbox output shaft carrier and output shaft Assembly are aligned, drove and case epicycle wheel are adjacent sprockets, a tubular shaft housing epicycle wheel, an output shaft carrier and output shaft Assembly are adjacent sprockets on the ring gear of the output shaft of the unit set the coupling switch to ora plug switch interconnected with the slide, characterized in that the gear on the primary shaft is fixed, it is engaged with the gear, with gear extended, loosely mounted on the intermediate shaft, the gear output shaft also has a gear extended next to a ring gear of the primary gear shaft, these toothed crowns is the coupling gear interconnected with a fork switch with another coupling half mounted on the toothed crowns of the intermediate gear shaft, gear output shaft drove off, gear output shaft Assembly position, the clutch switch on the crown has three internal gear on the slide clutch switch rigidly fixed ring gear with internal and external toothing, the external toothing of which is connected with the three-position ring gear housing Assembly.



 

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