Automotive gearbox

FIELD: transport.

SUBSTANCE: gearbox comprises planetary step-down helical gearbox and automatic system of shifting from 1st to 2nd gear. Said planetary reduction gear consists of drive shaft 1 supporting crown gear 2 with drive disc secured thereat, sun gear 3 running on driven shaft 4 with carrier 5 rigidly secured thereat with axles 6 and pinions 7 engaged with crown and sun gears. Automatic gear shifting system consists of friction coupling with its drive discs 8 coupled via splines with crown gear and driven discs coupled via case 10 and disc with pinion axles and carrier and with driven shaft of centrifugal weights 11 with springs 12, and automatic sun gear control system. Cases of coupling 10, disc 26 and axles of pinions 6 and carrier are rigidly interconnected. Extreme left drive disc of coupling 27 is bolted to crown gear. Slave arms of centrifugal weights with sleeves at their ends are pressed via working springs to crown gear for compression of coupling discs.

EFFECT: higher reliability.

1 dwg

 

The proposed transmission relates to motor vehicles and can be applied to release the driver from having to shift gears to reduce the intensity of work, fatigue and accidents, improve traffic safety and reliability of the friction clutch.

Known two-stage gearbox containing a torque Converter, mechanical planetary gearbox with multi-plate clutch, two band brakes and electro-hydraulic control system, including pump speed and power regulators, cylinders, etc. (Varlamov VK Cars. Design and elements of the calculation. - M.: Academy, 2006. - S-113, RIS).

The main disadvantages of this transmission are the complexity and high construction costs, loss of engine power on the operation of the control system (drive hydraulic pump etc)

Closest to the present invention is a two-stage transmission, containing planetary helical gearbox with locked rigidly connected with the transmission housing) sun gear, a crown gear which is mounted freely on the splines on the drive shaft of the gearbox, and drove with satellites and their axes on the driven shaft of the gearbox, multi-disc friction clutch, the lock depending on the ratio of the axial force in toothed engagement of the gear and centrifugal force cargo installed on the driver, driving and driven shafts (crown gear and drove to enable the second gear (Famines GI, Petrenko A.M. cars of domestic and foreign production. - M.: Transport, 2002. - P.93-94, RIS).

The disadvantage of this construction is that when you enable the second gear sun gear of the gear remains locked (i.e. rigidly connected with the transmission housing)that will stop the engine or damage to the structure, i.e. there is no mechanism to unlock the sun gear, and if you keep in mind that it is unlocked in the diagram and in the description there is no mechanism for carrying out this operation, as well as the presence of sliding friction between the outer left end face of the crown gear and the housing clutch plates, which greatly reduces the reliability of the gearbox when driving in first gear.

The technical result of the proposed transmission is to ensure the health and reliability of the structure.

This technical result is achieved by the fact that the two-stage transmission, containing a cylindrical helical planetary gear, a crown gear which is adjustably mounted on the splined drive shaft and the sun gear is free, and the axis of the satellites is rigidly on the driven shaft, a friction multi mu is the one leading the disks through which the slots are associated with a crown gear, and driven through the clutch housing with the axes of the satellites, and centrifugal loads on the clutch housing, which can disperse and working through the spring to compress the discs equipped with an automatic control system state of the sun gear (lock, unlock), including tormozok consisting of a disc drum brake, the brake disc which is rigidly connected with a sun gear and brake pads movably through the axis with a fixed caliper, drive interconnected horizontal thrust two shoulders levers that through the Cam, rod and two shoulders lever with a spring connected with a crown gear, and through the leash eccentric and traction - control lever directly from the driver, the clutch housing through the disk and the axis of the satellites is rigidly connected with the planet carrier, the left extreme (motor side) leading the clutch plate is bolted to the crown gear, and the Executive shoulders centrifugal cargo perpendicularly mounted at their ends by bushings with end-to-end hex holes, in which adjustably mounted levers hexagonal cross section with the forks with radial axes with workers cylindrical roller bearings, through the working of the spring pressed to the crown gear for disk compression mu is so

The drawing shows a diagram of the proposed transmission.

The proposed transmission includes a planetary reduction cylindrical helical gearbox and automatic switching from the first gear to second. Planetary gear consists of a drive shaft 1, which is movable in the slots mounted crown gear 2 mounted on it with bolts at the left (motor side) leading drive sun gear 3, freely installed on the driven shaft 4 is rigidly secured on the planet carrier 5 with the axes 6 and 7 satellites which engages with a crown and a sun gear.

Automatic switching system consists of a friction clutch, wheel disks 8 which are connected through the slots with a crown gear, and the driven disks 9 through the housing 10 and the disk with the axes of the satellites and the planet carrier, and therefore, with the driven shaft, a centrifugal cargo 11 spring 12, secured to the axles on the clutch housing, and an automatic control system state of the sun gear, including tormozok consisting of a disc drum brake, the brake disc 13 which is rigidly connected with the sun gear and the brake pads 14 is movable through the axis 15 with a fixed support (not shown in the figure), two shoulders drivers 16 and 17, the lower ends of which can squeeze the pads to the on the SKU, and the upper end of the shorter two shoulders of the lever through horizontal adjustable along the length of the rod 18 pivotally connects with a longer lever and through the Cam 19, the thrust two shoulders 20 and the lever 21 with a spring 22 connected with a crown gear, and through the lead 23 of the eccentric and rod 24 with the control lever 25 with the sector and the latch directly from the driver. The clutch housing 10, the disk 26 and the axis of the satellites 6 and drove rigidly connected. Left winger (motor side) leading the clutch disc 27 is bolted to the crown gear. Executive shoulders centrifugal loads with sleeves at their ends with end-to-end hex holes, which is movable perpendicularly mounted levers hexagonal cross section with the forks with radial axes 28 working with cylindrical rollers 29 on the bearings, through the working of the spring pressed to the crown gear for disk compression couplings.

The proposed transmission as follows.

A) When using the gearbox in vehicles with unstable closed clutch or torque Converter.

The handle of the control lever Termocom is in position "Tormozok enabled. When rotated counterclockwise, the Cam through the levers 16 and 17 with a thrust of 18 will press the brake pads of the disc brake mechanism timoska to the drive. In addition to t the th, when the engine is running, turn on the clutch and acceleration in first gear sun gear 3 gear due to the working of the spring 22 and the axial force engages the crown gear 2 satellites 7 completely blocked by Termocom.

When the desired speed during acceleration of the centrifugal force of the weights 11 become larger axial forces engages the crown gear satellites, resulting in a friction clutch gearbox, through the Executive arms of weights, springs 12, the axis of the cylindrical rollers 29 begins to smoothly engage and transmit torque, and torque and axial force to engage the crown gear - satellites - to decrease, at the same time, the crown gear 2 on the splines of the drive shaft moves smoothly to the right and through the levers 21, 17 and rod 20 off tormozok management system, releasing (unlocking) the sun gear 3.

This planetary gear clutch is blocked, i.e. its driving and driven shafts and related parts rotate as a unit - on second gear. By reducing the speed of the vehicle to the target transmission will automatically shift to first gear, and when reaching the set speed again to switch to the second transmission, depending on the forces to fight the Oia movement and position of the gas pedal.

For the movement of the tumbler switch off the grip or handle of the control lever Termocom put in position "Tormozok off", as shown in the diagram.

B) When using the gearbox in vehicles with permanently closed grip.

The vehicle is stationary. When the engine is running, turned off the arm of the control lever tormance and is always a closed friction clutch drive shaft, crown wheel, satellites and the sun gear will rotate, and drove with the driven shaft will be fixed.

Starting the vehicle with the driver turns off the clutch, translates the handle control Termocom to "Tormozok enabled", while the sun gear of Termocom is blocked, which corresponds to the first gear.

Next, the driver pressing on the gas, release the clutch pedal. The vehicle moves off. This rotates the driving shaft with a crown gear, satellites, drove with the housing of the friction clutch and the driven shaft, and acting axial force engages the crown gear satellites increase the compression force of clutch plates timoska and prevent premature inclusion of the friction clutch from the centrifugal forces of the weights.

When you reach the desired speed in the process the e acceleration of the centrifugal force of the weights 11 become larger axial forces engages the crown gear - the satellites, resulting in a friction clutch gearbox, through the Executive arms of weights, springs 12, the axis 27 and the cylindrical rollers 29 begins to smoothly engage and transmit torque, and torque and axial force to engage the crown gear - satellites - to decrease, at the same time, the crown gear 2 on the splines of the drive shaft moves smoothly to the right and through the levers 21, 17 and rod 20 off tormozok management system, releasing (unlocking) the sun gear 3.

This planetary gear clutch is blocked, i.e. its driving and driven shafts and related parts rotate as a unit - on second gear. By reducing the speed of the vehicle to the target transmission will automatically shift to first gear and Vice versa.

Thus, the proposed transmission for a vehicle has a simple structure, small size, weight and cost, does not require energy to work its control system, frees the driver from having to shift gears and control the friction clutch during movement with the aim of reducing the tension of the labour and fatigue of the driver, accidents and improve the safety and reliability of the friction clutch which will only be used when pulling away.

Transmission for a motor vehicle, containing a cylindrical helical planetary gear, a crown gear which is installed movably on the splined drive shaft, a sun gear - free, and drove with satellites and their axes is rigidly on the driven shaft, a friction multi-plate clutch, wheel disks through which the slots are associated with a crown gear, and driven through the clutch housing with the planet carrier, and centrifugal loads on the clutch housing, which can disperse and working through the spring to compress the disks, characterized in that it is equipped with an automatic control system state of the sun gear (lock, unlock), including tormozok consisting of a disc drum brake, the brake disc which is rigidly connected with a sun gear and brake pads movably through the axis with a fixed caliper, drive interconnected horizontal thrust two shoulders levers that through the Cam, rod and two shoulders lever with spring associated with a crown gear and through the leash eccentric and traction - control lever directly from the driver, the clutch housing through the disk and the axis of the satellites is rigidly connected with the planet carrier, the left extreme (motor side) leading the clutch plate is bolted to the crown gear, and the Executive shoulders centrifugal who Ruzau with perpendicularly mounted at their ends by bushings with end-to-end hex holes in which is adjustably mounted levers hexagonal cross section with the forks with radial axes, with workers cylindrical roller bearings, through the working of the spring pressed to the crown gear for disk compression couplings.



 

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