Differential

FIELD: machine building.

SUBSTANCE: differential consists of power elements, of devices for locking and unlocking kinematic link between power elements and of lock members. As power elements there are used worms and worm gears forming self-braking worm pairs. As devices for locking and unlocking kinematic link between power element there are used controlled gear drives of worms from output shafts. The gear drives have similar gear ratios with worm pairs.

EFFECT: raised reliability of differential.

2 dwg

 

The invention relates to mechanical engineering and can be used in the manufacture of wheeled vehicles.

Known differentials with roller freewheel clutches (see Osenkov CENTURIES, Frumkin, A. Textbook for students majoring in "Automobiles and automobile economy" - M engineering, 1989, s).

These differentials automatically allow rotation of either of the two output shafts with angular velocity different from the angular velocity of the other. The components of the differential are not loaded additional friction torque, as in differentials with high internal friction. The use of such differentials at major bridges wheeled vehicles significantly increases their permeability. However, due to the lack of durability of the roller clutches such differentials have limited scope.

Known differential freewheel Cam type (see Osenkov CENTURIES, Frumkin, A. Textbook for students majoring in "Automobiles and automobile economy" - M.: Mashinostroenie, 1989, s, RES), consisting of load-bearing elements that transmit the torque from the differential housing to the output shaft (Cam clutch with the teeth of rectangular profile, the device for opening the kinematic connection between the housing of the differential vihodnimi shafts (Cam clutch with a trapezoidal profile) and locking device, ensure the locking of the driven parts of the coupling in the open state when the rotation angular velocity and the closure of the kinematic connection with the alignment of the angular velocity of the coupling.

In the specified differential separation of kinematic connection (and then its connection) is performed by moving the driven coupling, through which the transmitted torque on the output shaft. This causes the closure and opening kinematic link dynamic loads in parts of the transmission, which reduces the reliability and durability of the differential.

The technical result from the use of the invention is to improve the reliability of the differential.

The technical result from the use of the invention is achieved due to the fact that the differential containing power elements that transmit the torque from the differential housing to the output shaft, devices for closing and opening the kinematic connection between the housing of the differential and output shafts and locking device, as the power elements are used worm and worm wheel, forming effect of the worm pairs, as a device for closing and opening the kinematic connection between the housing of the differential and output shafts are driven gear drive worms from the worm wheel having od is nekovee with gear pairs ratio.

Differential use as load-bearing elements effect the worm a couple, and as a device for opening and closing the kinematic connection between the housing of the differential and output shaft driven gear drive has a significantly smaller dynamic loads, as open kinematic relation relative position of the worm and worm wheel changes within the gap of their gear.

The essence of the proposed technical solution is illustrated by drawings (Figure 1 - General view of the differential type a and section B-B figure 2 - a view b In figure 1). The differential has prefab housing 1, with fixed therein on bearings with worms 2. The worm wheel 3 is stationary mounted on the output shaft 4 and engages with the worm 2. On the hub of the worm wheel bearing set wheel gears 5 drive worms. On the splined output shaft mounted gear clutch 6, which is constantly biased toward the center of the differential spring 7. The disks 8 are mounted on the ends of the output shafts and have their hubs pins 9, which upon axial movement of the disks slide along the slots of the output shaft 10, having bevels 11. The disks 8 are side Cams trapezoidal profile, which engage with the Cams of the ring 12. The ring 12 is mounted in the space between the case 1 and has the t able to turn about the axis of the output shaft. To the housing 1 mounted tarnoski 13, which are pressed by springs to the rims of the disks 8. Leading gear 5 kinetically connected equipment through the cylindrical gear 14, 15, 16 and bevel gears 17, 18. The shafts of the gears 14, 15, 16, 17 placed in the brackets of the differential housing, gear 18 is stationary on the shaft of the worm. The differential case rotates on bearings 19 and is driven through the gear 20.

Since the gear ratio of gear drive and worm pairs are equal, then the rotation of the worm wheel with the included gear drive worm rolls in his teeth and prevents the rotation of the wheel.

The differential operates as follows. During rotation of the housing 1 differential coils worms 2 after selecting the gap in engagement against the teeth of the worm wheel 3 and begin to rotate them. Turning of the worm 2 is not happening, because the worm pair effect. All the details of the differential in this case revolve about the axis of the output shaft 4 with the same angular velocity. By increasing the speed of rotation of one of the shafts (guide right along with it increases the speed of the right drive 8. The ring 12 is engaged with the left disk 8 and rotates with the angular velocity of the differential housing. Thanks trapezoidal profile Cams misalignment of the rotation speed n is avago disk 8 and the ring 12 causes the displacement of the disk, together with the right gear clutch 6 in the side of the pinion 5 of the drive worm 2. This results in a circuit through the internal crown gear pinion to the output shaft. Due to the presence of timoska 13 on the disk as it rotates relative to the housing acts tangential force, as a result of which the pin 9 goes beyond the bevel 11 of the groove 10 and holds the disk, and with it the toothed clutch 6 from returning to their original state under the action of the spring 7. The rotation of the shaft through the drive is transmitted to the worm 2. Since the gear ratio of the drive and worm pairs are equal, then the rotation of the worm wheel, the worm rolls in his teeth and prevents the rotation of the worm wheel with a greater angular velocity than the angular velocity of the differential housing. For alignment of the rotation speed of the right output shaft and the differential housing tangential force from timoska 13 on the rim of the disk 8 disappears, consequently, the force disappears, the retaining pin 9 on the bevel 11. Under the action of the spring 7 and the toothed clutch 6 and the disk 8 are moved to the center differential. The crown gear coupling opens with an internal crown pinion 5 of the actuator and the Cam disk 8 is closed with Cams ring 12. The worm 2 stops rotating, rests on the teeth of the worm wheel 3 and passes the time away from the chassis 1 di is ferential.

The operation of the proposed differential switching on and off of the drive of the worm comes at a time when its coils are not representative of the efforts on the worm wheel (do not touch the teeth of the worm). Power on the drive worm and the force in the actuator, in this case, small to create significant dynamic loads on the transmission.

The design locking devices and gear drives worms can be performed by other known schemes.

This factor reliability designed differential will be higher than the known differentials with freewheel clutches.

Differential containing power elements, devices for opening and closing the kinematic connection between the power elements and locking device, characterized in that as the power of the elements use the worm and worm wheel, forming effect of the worm pairs, and as a device for opening and closing the kinematic connection between the security elements used driven gear drives the worms from the output shaft, with gear drives have the same gear ratio with the worm pairs.



 

Same patents:

FIELD: mechanical engineering.

SUBSTANCE: differential mechanism comprises housing (1), parallel shafts (5) and (4), screw (2), and nut (3). Nut (3) cooperates with screw (2) through the kinematic link composed of three pairs of gearing wheels. Screw (2) can move along the axis. The number of teeth of conical wheel of first shaft (5) of electric motor (6) is determined by the number of teeth chosen from the specified interval from 13 to 157. The product of the number of teeth of conical wheel fit on nut (3) and cylindrical wheel fit on shaft (4) is determined from the formula proposed.

EFFECT: expanded functional capabilities.

1 dwg, 1 tbl

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FIELD: machine building.

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FIELD: transport.

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2 dwg

FIELD: machine building.

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2 dwg

FIELD: transport.

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FIELD: machine building.

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FIELD: machine building.

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FIELD: machine building.

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FIELD: machine building.

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3 dwg

FIELD: transport.

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6 dwg

FIELD: machine building.

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9 dwg

FIELD: transport.

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2 cl, 3 dwg

Bevel gear // 2341385

FIELD: transport.

SUBSTANCE: bevel gear contains casing (1) with opposite axle shaft gears (2, 3) axis of channel whereof forms acute angle with casing rotation axis of channel. On differential pinion axis (6) collets (10) are installed capable of shift along axis. Pinions (4, 5) engage with collets and penetrating into narrowed zone located between axle shaft gears are seized transmitting torque to stopped axle shaft gear and stopping slippage.

EFFECT: increase of bevel gear slippage properties.

5 dwg

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