Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16H—GEARING
  • F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
  • F16H61/18—Preventing unintentional or unsafe shift, e.g. preventing manual shift from highest gear to reverse gear
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16H—GEARING
  • F16H59/00—Control inputs to control units of change-speed-, or reversing-gearings for conveying rotary motion
  • F16H59/02—Selector apparatus
  • F16H59/04—Ratio selector apparatus
  • F16H2059/048—Ratio selector apparatus with means for unlocking select or shift movement to allow access to reverse gear position

Definitions

• the present invention relates to a reverse gear involuntary articulation inhibitor device for external commands of auto ⁇ mobiles speed gears. More precisely, the invention relates to an inhibitor device of the type comprising a bolt consisting of the gear lever and an inhibitor lock consisting of the lever fixed articulation and in which the bolt, supported on an axially movable tube relative to the lever, is displaceable for surpassing the inhibitor lock and allow the reverse gear articulation.
• the first and second gears are opposed and aligned in correspondence to a shift plane which is located on the left side (referring to the scheme) of the central position, or dead point of the gear lever
• the third and fourth gears are opposed and aligned in correspondence to a shift plane which passes by the central position
• the fifth gear is opposed to the reverse gear and aligned with it in a shift plane disposed on the right side of said central position.
• the inhibitor lock is essentially for preventing the reverse gear involuntary articulation, mainly when the gear is chosen passing from the fifth to the fourth gear or, more generally when this latter gear is inserted from a dead point provisional position, procedure which is often made by inexperienced drivers, for example, in a slope.
• the lock consists in a small fixed block of rigid material, provided with an opposition inclined plane which, during the disarticula- tion procedure of the fifth gear, secures a corresponding and conjugate inclined plane of the bolt associated to the lever for preventing the straight displacement corresponding to the reverse gear articulation and for deviating the lever itself towards the central articulation plan, according to a substantially coiled travel, in order to facilitate the fourth gear shift; the reverse gear shift is only possible by means of the voluntary lifting of the bolt and by the consequent release of this inhibitor lock bolt.
• the present invention is essentially intended to eliminate these and other drawbacks and, within this general purpose scope, it has the important purpose to improve said reverse gear inhibitor devices in order to substantially improve the movement capacity of the gear lever and increase the command reliability, eliminat ⁇ ing locking possibility in case of an incorrect maneuver carried out by inexperienced drivers.
• the invention is substantially based on the concept of securing the inhibitor lock in rotating and not fixed fashion, and subject it to the action of an elastic means which applies, to said lock, a moment which tends to distance the inclined plane of said lock from the bolt corresponding conjugate inclined plane travel.
• the rotating inhibitor lock consists of a lever in closed square according to an axis which is located in a substantially parallel plane to the central shift plane.
• This lever in square comprises a lower arm extending in a substantially orthogonal direction towards said central articulation plane and shows the opposition inclined plane cooperating with the corresponding lever bolt conjugate plane, and an upper arm extending substantially parallel towards the central articulation arm.
• Over the upper i-.. m there acts an impulse finger which is interdependent in the bolt tube and able to oppose said elastic means force acting on the lock.
• - Figure 1 is the gear lever movement scheme for selecting and articulating the gears in a five-relation speed gear plus the reverse gear.
• - Figure 2 is an exploded perspective view of a gear lever with the improved inhibitor device according to the invention.
• Figure 3 is an elevation (or front) view of Figure 2 device, showing said device inactive embodiment corresponding to the gear lever central position or dead point.
• FIG. 3a is a section according to line Illa-IIIa of Figure 3.
• Figure 4 is a similar view to Figure 3, showing the device active embodiment corresponding to the fifth gear and reverse gear shift position of the gear lever.
• FIG. 4a is a section according to line IVA-IVA of figure 4.
• Figure 5 is a similar view to Figure 3, showing the device in the voluntary release position allowing the reverse gear shift.
• the gear lever 10 movement in the shift plane P is controlled by an inhibitor device which has the function to prevent the reverse gear RM involuntary shift, for example, when lever 10 is displaced from the fifth gear shift position to the fourth gear shift position - deviating the lever 10 along a coiled travel indicated with T in Figure 1.
• the inhibitor device indicated in its assembly as No. 20, comprises a bolt 11 fixed to tube 12, which is seated over lever 10 and is axially movable in relation to this latter, against the action of a spring 13; the tube is provided with an end collar 12a which intends to secure and displace the tube itself.
• the bolt cooperates with the inhibitor lock 21 which, according to the invention, consists of a lever in oscillating square pivoted to a fixed support 22 and rotating about an articulation preferential axis "a" which is located in a substantially parallel plane to the second shift plane P 2 and oriented substantially orthogonally to the lever axis 10 considered in its dead point central position.
• the lever 21 comprises a lower arm 21a which extends in a substantially orthogonal direction towards said second shift plane P2 and an upper arm 21b extending in a substantially parallel direction towards said shift plane P2.
• the lower arm 21a and the upper arm 21b meet each other substantially in opposite parts in relation to the articulation axis "a" and the upper arm extends into a lower continuation 21c also located on the upper arm opposed part in relation to axis "a".
• the lower arm 21a is provided with an opposition inclined plane 24 which can cooperate with the corresponding inclined and conjugate plane 14 existing on the bolt 11.
• a thrust spring 23 which subjects the lock itself to an elastic moment that tends to make it turn in a certain sense (anticlockwise referring to Figure 3 ) for displacing the lower arm 21a out of the path traveled by bolt 11 when the gear lever is manipulated in the shift plane P3.
• the movable tube 12 of bolt 11 presents a thrust finger 15 oriented towards the upper arm 21b of lock 21 and able to secure said arm in order to be opposed to the spring 23 action and prevent said lock oscillation when lever 10 is manipulated in the shift plane P3 (V-RM).
• Lock 21 may then oscillates between a non-interference inactive position with bolt 11 and an interference operational position with said bolt.
• the inactive position determined by the spring 23 action, is kept by the inhibitor lock 21 for the gear lever 10 displacements in the shift planes P-
• the above mentioned thrust finger 15 is released, or substantially released, from arm 21b of lock, which allows, as before mentioned, the lock rotation in a certain sense (anticlockwise in the figure) in accordance to the spring thrust direction and determines the arm 21 displacement out of the bolt travel 11.
• the lock 21 may be pivoted about the described orthogonal axis "a" and thus substantially parallel to the lever 10 axis.

Landscapes

• Engineering & Computer Science (AREA)
• General Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Gear-Shifting Mechanisms (AREA)
• Arrangement Or Mounting Of Control Devices For Change-Speed Gearing (AREA)

Applications Claiming Priority (2)

Publications (2)

Family

ID=4063256

Family Applications (1)

Country Status (7)

Families Citing this family (1)

Citations (4)

Family Cites Families (1)

• 1996
  • 1996-05-27 BR BR9602487A patent/BR9602487A/pt not_active IP Right Cessation
  • 1996-06-03 TR TR96/00462A patent/TR199600462A2/xx unknown
  • 1996-06-05 JP JP9500014A patent/JPH11506407A/ja active Pending
  • 1996-06-05 KR KR1019970708927A patent/KR19990022446A/ko not_active Application Discontinuation
  • 1996-06-05 EP EP96917297A patent/EP0827578A4/de not_active Withdrawn
  • 1996-06-05 AU AU59933/96A patent/AU5993396A/en not_active Abandoned
  • 1996-06-05 WO PCT/BR1996/000022 patent/WO1996039592A1/en not_active Application Discontinuation

Patent Citations (4)

Non-Patent Citations (1)

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