SU472055A1 - Gear shift mechanism - Google Patents

Description

one

FIELD: transport engineering.

A mechanism for switching gears of motorcycles is known, comprising a pedal-driven switching shaft with a double-arm lever, a return spring, a toothed sector that meshes with the worm-shaft gear, and a rotation limiter.

The purpose of the invention is to simplify the design of the gearshift mechanism.

The goal is achieved by the fact that in the toothed sector of the gearshift mechanism there is a groove with a figured protrusion in which a double-arm lever is placed, having a hole in one of the shoulders with a spring-loaded pin in it that interacts with one of the sides of the slot of the sector, and on the other arm of the lever Figure hollow interacting with the above-mentioned figure ledge.

FIG. 1 shows the proposed gear shift mechanism, a general view; in fig. 2 is a section along the A-L in FIG. one; in fig. 3 p 4 - sector in intermediate positions.

The gearshift mechanism includes a gearshift shaft 1 with a double-arm lever 2, on one shoulder of which a fig-shaped depression 3 is made with bevels 4. The double-arm lever is installed in a toothed sector 5 with a figured protrusion 6. From the lateral displacement the toothed sector 5 is held by washers 7 and 8 The flange of the toothed sector 5 is constantly pressed against the two shoulders lever 2 with a pin 9 and a spring 10 installed in the two shoulders of the lever 2. A pin 11 is pressed into the toothed sector 5, the free end of which is included in the groove 12 of the turn restrictor 13, set on the shaft 1 gearshift. The pin 14 is pressed into the housing 15, which consists of two halves. On the limiter 13 of rotation is installed spring 16, and between its ends are pins 11 and 14.

The casing has a worm shaft 17 with gear 18 and gear shift forks 19. At the end of the screw shaft, triangular grooves 20 are made into which the tooth 21 of the retainer 22 enters. The retainer can be freely rotated on the axis 23 installed in the housing, and the tooth of the retainer 21 is pressed against the worm shaft by a spring (not shown).

From axial movement in l gears limited to retaining ring 24.

When shifting gears, the gearshift shaft 1 and two-shoulders lever 2, which presses the bevel 4 of the figured hollow 3 onto the figured protrusion 6 of the gear sector 5, rotate when shifting gears. The gear sector 5 moves toward gear 18. Return spring 16 with pins I and 14 keeps the toothed sector 5 from turning around the axis of the gear shaft, the spring 10 is compressed. The toothed sector 5 engages with the gear 18 of the worm shaft 17. The pin 11 moves progressively in the groove 12 of the turn restrictor 13 and between the ends of the return spring 16-. When the gaps in the gearing are selected, the toothed sector 5 begins to rotate together with the gearshift shaft (position in FIG. 3), the pin And spreads the free ends of the springs 16. The rotation angle of the toothed sector 5 is limited by the groove 12 of the rotation stop 13. The toothed sector 5, through the gear locking of the gear 18, rotates the worm shaft 17. The shift forks 19 are moved, including the gear in the shift box. When the worm shaft 17 is rotated, the tooth 21 of the retainer 22 leaves the groove 20. At the end of the rotation of the toothed sector 5, the tooth 21 of the retainer 22 will enter the next 20, and the ring 24 will hold the worm shaft 17 from turning. At the end of the gearshift, the gearshift shaft 1, double-arm lever 2 and the gear sector 5 are released from the force from the pedal side, and now the force from the spring 16 side to the pin AND the gear sector 5 becomes the driving force. However, the gear sector 5 cannot yet turn the initial position, as it is in engagement with the gear 18, held from rotation by the latch 22 Pin 9 due to the action of the compressed spring 10 removes the toothed sector 5 from the pinion with gear 18 (position pa of FIG. 4), while the pin 11 slides along zu spring 16. The spring 16 returns the pin through sector gear 5, two-armed lever 1 and the shaft 2 shifting in the starting position. Subject of the Invention A gear change mechanism, mainly for motorcycle gearboxes, comprising a pedal-driven shift shaft with a double-arm lever, a return spring, a toothed sector that engages with a worm shaft gear, and a rotation limiter that, in order to simplify its construction, in the toothed sector, there is a groove with a figured protrusion in which a double-shouldered lever is placed, having a hole in one of its shoulders with a spring-loaded pin in it that interacts with one of the The groove of the sector, and on the other arm of the lever, is executed a figure depression interacting with the figured protrusion.

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