PL161470B2 - Tricycle steered wheel drive transmission unit - Google Patents

Abstract

a drive transmission assembly for a steered wheel of a three-wheeled vehicle, in which the steered wheel is simultaneously driven, characterized in that in a divided housing (1) on six axles (2) there are mounted six gear wheels (3), which, in addition to the peripheral teeth, have lateral conical teeth (9), and one of these wheels is driven by a drive shaft (4) through conical teeth (9), and the peripheral teeth of the wheels (3) drive a central gear wheel (8) with teeth (10) with a radial profile in a plane parallel to the axis of the gear wheel (8), wherein the wheel (8) is mounted on an axle (7) in a fork (6) connected to a turntable (5).

Description

The subject of the invention is the construction of the drive train enabling unlimited turning of the steered and simultaneously driven road wheel in three-wheeled vehicles.

Previous designs of the drive of the third steered road wheel of a tricycle consisted in direct placement and locking of the engine with this wheel or in connecting it with a joint.

With the direct locking of the engine with the steering wheel, the engine sits next to the wheel and drives it while simultaneously turning with the wheel as it steers. The disadvantage of this solution is the inability to make a free, unrestricted turn of the steered wheel: an ^p . ⁷²⁰ ° wskute ^{k COG} k on ^and community control of s ^ niki.em ^for Measuring ^oC and respective ties, cables or other devices. There is a connection between the motor located next to the wheel and the rest of the vehicle, which may only have limited flexibility, preventing the steering wheel from turning freely.

It is also necessary to use reverse gear to ensure driving in reverse, since it is not possible to turn the driven wheel so much that it would travel in reverse.

The essence of the solution consists in placing six identical axes in the split housing, on which six gears of similar design rotate, interacting with each other thanks to the side conical toothing, which is shifted on every second wheel by half the nominal pitch to ensure proper cooperation with the central gear wheel. One of the gears is driven by a shaft transmitting power from the engine, and thanks to the side conical toothing the drive is transferred to the other gears. There is a fork on the vertical turntable, in which the center gear with radially machined toothing rotates on the axis, receiving the drive from the set of gears. This wheel, together with the fork, can make unlimited turns on a vertical turntable. Due to the displacement of the axis of the middle gear in relation to the vertical axis of rotation of the turntable by a certain value and thanks to the radial contour of the teeth of the middle gear in a plane parallel to the axis of this wheel, the correct cooperation of the middle gear with a set of six gears is ensured. The drive takes the drive from the middle gear to the road wheel.

The advantage of the solution is the possibility of making unlimited (by any number of degrees) turns of the steered drive wheel of a three-wheeled vehicle, which ensures its very high maneuverability. It is also possible to smoothly switch from driving forward to driving backwards, as well as driving backwards can be achieved thanks to a sufficiently large turning of the road wheel. Due to the unlimited turning of the steered drive wheel, it is unnecessary to use reverse gear in the vehicle, which simplifies the design of the gearbox.

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The structure of the drive transmission is shown in the embodiment in the drawing, in which Fig. 1 shows a cross-section of the structure in top view, and Fig. 2 shows a side view of the mating gears with the structure of the teeth shown. Six identical axes 2 are mounted in the split housing 1, on which six gears 3 of similar design rotate. These wheels have conical toothing 9 on their side surface, which locks all six wheels. In order to ensure the correct cooperation of the gears 3 with the central gear wheel 8, the teeth 9 are shifted by half of the nominal pitch on every second gear wheel, which causes the tooth tops and the tooth bottom of all gears 3 to coincide. One of the gear wheels 3 is driven by a shaft drive 4 transmitting power from the engine. A fork 6 is mounted on the vertical turntable 5, in which the center gear 8 rotates on the axis 7, receiving the drive from the set of six gear wheels 3. The axis 7 is shifted by a certain amount in relation to the vertical axis of rotation of the turntable 5, the tooth profile 10 of the middle wheel of the toothed wheel 8, in cross section parallel to the axis of rotation of the toothed wheel 8, is radial, which ensures the correct cooperation of the teeth of the wheels 3 and 8 during the rotation of the turntable 5 with the toothed wheel 8. From the central toothed wheel 8, the drive is taken to the road wheel.

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161 470

Department of Publishing of the UP RP. Circulation of 90 copies. Price: PLN 10,000

Claims (1)

Patent claim The drive transmission unit of the steered wheel of a tricycle, in which the steered wheel is simultaneously driven, characterized by the fact that in the divided housing (1) on six axes (2) there are six toothed wheels (3), which, in addition to the circumferential toothing, have lateral conical toothing (9), and one of these wheels is driven by the drive shaft (4) through the conical toothing (9), while the circumferential teeth of the wheels (3) drive the middle gear (8) with the toothing (10) with a radial contour in a plane parallel to the axis gear (8), the wheel (8) is mounted on the axle (7) in a fork (6) connected to the turntable (5).