Gear shift device and associated mobility vehicle

Patent metadata

Field	Value
Publication number	US-2024174324-A1
Application number	US-202218283138-A
Country	US
Kind code	A1
Filing date	Feb 17, 2022
Priority date	Mar 21, 2021
Publication date	May 30, 2024
Grant date	—

Abstract

The invention relates to a gear shift device for a mobility vehicle, comprising: —a selection shaft in which a shuttle and a worm are arranged, —at least two input pinions arranged to rotate freely about the selection shaft, —at least two output pinions coupled in rotation with a hollow shaft, —a gear shift actuator arranged to move the shuttle along the worm between at least two positions, and to engage a selected gear ratio, —at least two pawls arranged on the selection shaft, each pawl being associated with a lifting device for lifting the pawl via the shuttle, and to engage the gear ratio selected via the input and output pinions, the device comprising a radial blocking system, which is formed in one piece, for keeping all the pawls in place on the selection shaft.

First claim

1 . A gearshift device for a mobility vehicle, comprising:
a selection shaft in which there are housed a shuttle and a worm, at least two input pinions configured so as to turn freely around the selection shaft, at least two output pinions that rotate as one with a hollow shaft, a gearshift actuator arranged so as to displace the shuttle along the worm between at least two positions and to engage a selected gear, at least two pawls positioned at the selection shaft, each pawl being associated with a lifter device allowing the pawl to be lifted by the shuttle and engage the gear selected via the input and output pinions, wherein the gearshift device also comprises a radial blocking system, formed as a single piece, to hold all of the pawls in place on the selection shaft.

2 . The gearshift device as claimed in claim 1 ,
wherein the blocking system is formed of a longitudinal flat part from which there extend at least two tabs, each of the tabs being positioned above one of the pawls.

3 . The gearshift device as claimed in claim 2 ,
wherein the tabs are formed starting from a first edge, parallel to the axis of the blocking system, of the flat part and are oriented perpendicular to the axis of the blocking system.

4 . The gearshift device as claimed in claim 2 , wherein the flat part is inserted, via a second edge, opposite to the edge at which the tabs are situated, into a longitudinal slot formed in the selection shaft.

5 . The gearshift device as claimed in claim 4 ,
wherein the second edge is bent over toward the shaft so as to be inserted into the slot.

6 . The gearshift device as claimed in claim 2 , wherein each pawl comprises a recess the shape of which complements that of the tab so that the tab is housed in the recess.

7 . The gearshift device as claimed in claim 1 , comprising seven input pinions, seven output pinions, seven pawls and seven tabs.

8 . The gearshift device as claimed in claim 1 , wherein the radial blocking system comprises a positioning tab.

9 . A mobility vehicle, comprising a gearshift device as claimed in claim 1 .

10 . The mobility vehicle as claimed in claim 9 ,
wherein the vehicle is an electrically assisted bicycle.

Assignees

• Valeo Embrayages

Inventors

• Laurens Christophe
• Caillaud Jonathan
• Boulet Jerome
• Yacoubi Nadia

Classifications

• B62M11/06 Primary

  with spur gear wheels (B62M11/14 takes precedence) · CPC title

• B62M25/08

  with electrical or fluid transmitting systems · CPC title

• B62M6/55 Primary

  power-driven at crank shafts parts · CPC title

• F16H3/083

  with radially acting and axially controlled clutching members, e.g. sliding keys · CPC title

• F16H3/089

  all of the meshing gears being supported by a pair of parallel shafts, one being the input shaft and the other the output shaft, there being no countershaft involved · CPC title