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
  • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
  • F16D23/00—Details of mechanically-actuated clutches not specific for one distinct type
  • F16D23/02—Arrangements for synchronisation, also for power-operated clutches
  • F16D23/04—Arrangements for synchronisation, also for power-operated clutches with an additional friction clutch
  • F16D23/06—Arrangements for synchronisation, also for power-operated clutches with an additional friction clutch and a blocking mechanism preventing the engagement of the main clutch prior to synchronisation
• • 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
  • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
  • F16D23/00—Details of mechanically-actuated clutches not specific for one distinct type
  • F16D23/02—Arrangements for synchronisation, also for power-operated clutches
  • F16D23/04—Arrangements for synchronisation, also for power-operated clutches with an additional friction clutch
  • F16D23/06—Arrangements for synchronisation, also for power-operated clutches with an additional friction clutch and a blocking mechanism preventing the engagement of the main clutch prior to synchronisation
  • F16D2023/0656—Details of the tooth structure; Arrangements of teeth
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T74/00—Machine element or mechanism
  • Y10T74/19—Gearing
  • Y10T74/19219—Interchangeably locked
  • Y10T74/19284—Meshing assisters

Definitions

• the invention relates to a synchronization device according to the preamble of claim 1.
• Synchronizing devices for manual transmissions of motor vehicles have a sliding sleeve which can be connected in a rotationally rigid manner by axial displacement with a shaft and are provided with internal teeth, a coupling body provided with external teeth and a synchronizer ring which is connected in the circumferential direction with the sliding sleeve via external teeth in a form-fitting manner and with the coupling body is in a frictional connection.
• the toothing of the synchronizer ring has locking surfaces arranged at an angle to one another for engagement in corresponding locking surfaces of the toothing of the sliding sleeve.
• Such synchronizers are widely known and z. B. described in DE-PS 26 59 448. If a gear is engaged by moving the sliding sleeve in the axial direction from the neutral position, it takes the synchronizer ring with it and presses it against a mating cone of the clutch body. A frictional connection is established between the synchronizer ring and clutch body, whereby a speed adjustment between the shaft, the sliding sleeve and the synchronizer ring as well as the clutch body and the associated gear of the pair of wheels to be engaged is achieved.
• Locking surfaces provided on the synchronizer ring are brought into a position in which they come into engagement with associated and adapted locking surfaces on the sliding sleeve and thereby an axial displacement of the sliding sleeve in the direction of the Prevent clutch body.
• the locking surfaces are usually attached to an external toothing of the synchronizer ring, which is adapted to the external toothing of the clutch body; the counter surfaces are attached to the ends of the teeth, which form the internal teeth of the sliding sleeve. Only when the synchronous speed is reached can the sliding sleeve be pushed past the locking surfaces of the synchronizer ring into the external teeth of the coupling body.
• the gear wheel When shifting up the transmission, i. H. when a higher gear is engaged, the gear wheel, which is the same axis as the sliding sleeve and to which the connection is made when shifting up, initially runs faster than the sliding sleeve, so that it usually has to be braked to achieve synchronism via the synchronizer ring.
• a synchronizing device is used in DE-PS 34 44 670 the clutches of manual transmissions for motor vehicles are described with at least one pair of wheels, the gear wheel of which is coaxial with a sliding sleeve and has a clutch body with external teeth and can be switched on and off in the power flow by axially displacing the sliding sleeve, which is non-rotatably connected to a shaft via a synchronizer body and has internal teeth is, as well as with a synchronizer ring, which is in the circumferential direction with the sliding sleeve in a positive connection and with the coupling body in a frictional connection and the locking surfaces for the sliding sleeve, which with each relative rotation between the coupling body and sliding sleeve in the by the positive connection between the synchronizer ring and Sliding sleeve defined end positions prevent engagement of the internal teeth of the sliding sleeve in the external teeth of the coupling body and only when the synchronous speed is reached while rotating
• the external teeth of the coupling body and the locking surfaces of the sliding sleeve are designed asymmetrically, but in such a way that they have the same inclination with respect to the axial direction, but are offset with respect to the longitudinal center of each tooth in such a way that the two belonging to one tooth Treads have different axial dimensions and thus differently sized surfaces, the front locking surfaces in the running direction on the sliding sleeve having the greater axial dimensions compared to the rear locking surface in the running direction.
• the effect is specifically increased that when an upshift occurs after the synchronization process, the synchronizing ring enters the downshift locking position before the sliding sleeve with it
• Downshift locking edge in the axial direction has passed the downshift locking edge of the synchronizer ring.
• the downshift blocking position is the position at the opposite twist stop, while the downshift blocking surface is the length of the two locking surfaces on the sliding sleeve. After unlocking from this downshift locking position, the switching process can be ended without scratching in. Due to the asymmetry described above, however, a force pulse on the sliding sleeve occurs in the unlocking phase after an upshift when the synchronizer ring enters the downshift lock position, which can clearly be felt as a shock on the shift lever.
• the invention is based on the object of avoiding the force pulse on the sliding sleeve and thus preventing the impact acting on the shift lever.
• a synchronizing device for clutches in particular for manual transmissions for motor vehicles, is proposed with at least one pair of wheels, the gear wheel of which is coaxial with a sliding sleeve and has a coupling body with external teeth, and which has an internal toothing with axial rotation by axially displacing the sliding sleeve connected to a shaft via a synchronizer body the power flow on or off it can be switched off.
• the synchronizing device also has a synchronizing ring which is in the circumferential direction with the sliding sleeve in a positive connection and with the coupling body in a frictional connection and has locking surfaces for the sliding sleeve, which with each relative rotation between the coupling body and sliding sleeve in the through the positive connection between the synchronizer ring and sliding sleeve defined end positions prevent engagement of the internal toothing of the sliding sleeve with the external toothing of the coupling body and only allows when the synchronous speed is reached while rotating the synchronizer ring and coupling body.
• the front locking surfaces in the running direction on the toothing of the sliding sleeve have a smaller axial extent than the rear locking surface in the running direction.
• an asymmetry in the ridge of the locking teeth of the sliding sleeve is defined, which is opposite to the teeth arranged from the prior art. This ensures that the effect of running into the downshift blocking position is prevented and there is no significant power surge on the shift lever.
• the anti-reverse locking surface represents the short locking surface on the sliding sleeve in the axial direction.
• Fig. 2 shows the teeth in the locked state
• Fig. 3 shows the teeth in the unlocked state.
• a synchronizing device 22 has a synchronizing body 24, which is firmly formed on the main shaft 8. It has on its outer circumference an external toothing 30 on which a sliding sleeve 28 with its internal toothing 26 can be moved axially along the axis of rotation 32 of the main shaft 8.
• a synchronizer ring 34 is provided with its frustoconical, outer friction surface 36 on a correspondingly shaped, likewise frustoconical, inner friction surface 38 of the clutch body 40.
• the locking teeth 42 on the synchronizer ring 34 and the clutch lungs toothing 44 on the coupling body 40 are formed so that the sliding sleeve 28 can engage with their internal toothing 26 in these teeth 42 and 44 when the sliding sleeve 28 is axially displaced.
• the input shaft 4 also has a clutch body 46 with clutch teeth 48 and a synchronizer ring 50 with locking teeth 52.
• FIG. 2 shows the internal toothing 26 of the sliding sleeve 28, which has an asymmetrically designed tip.
• the side 54 of the toothing 26 forms a larger axial extension 60 than the axial extension 58 on the side 56.
• the side 54 bears against the side 62 of the locking toothing 52 until the synchronous speed between the sliding sleeve 28 and the coupling body 46 is reached is.
• the arrow 64 indicates the direction of rotation of the sliding sleeve 28, the arrow 66 the direction of rotation of the coupling body 46 and the arrow 68 the effective direction of a loss torque due to the braking of the coupling body 46.
• the speed of the coupling body 46 is during the synchronization process to the speed of the sliding sleeve 28 adjusted, while the synchronizer body 24, the synchronizer ring 50 and the sliding sleeve 28 remain constant in their speed.
• the unlocked state is shown.
• the synchronizer ring 50 has reached the same speed as the clutch body 46 due to the non-positive connection via the frustoconical friction surfaces.
• the synchronizer ring 50 is thereby rotated with the coupling body 46 in the direction of the effective loss torque 68.
• Due to the shorter axial extent of side 56 the outer edge 70 of the downshift lock page 72 on the sliding sleeve 28 in a position advanced towards the tip of the toothing 26.
• the outer edge 70 can no longer point to the rotation of the synchronizer ring 50 from the upshift blocking position (FIG. 2) in the direction of the downshift blocking position (FIG. 3)
• Locking side 74 of the locking teeth 52 run up.
• the sliding sleeve 28 slides with the downshift blocking side 72 past the side edge 76 of the locking toothing 52.
• An impulse from the impact of the side 56 on the locking side 74 and a rejection of the sliding sleeve 28 in the axial direction is avoided.

Landscapes

• Engineering & Computer Science (AREA)
• General Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Mechanical Operated Clutches (AREA)

Priority Applications (4)

Applications Claiming Priority (2)

Publications (1)

Family

ID=7641273

Family Applications (1)

Country Status (6)

Families Citing this family (8)

Citations (4)

Family Cites Families (8)

• 2000
  • 2000-05-10 DE DE10022509A patent/DE10022509A1/de not_active Withdrawn
• 2001
  • 2001-05-05 EP EP01938179A patent/EP1281008B1/de not_active Expired - Lifetime
  • 2001-05-05 DE DE50111203T patent/DE50111203D1/de not_active Expired - Lifetime
  • 2001-05-05 ES ES01938179T patent/ES2273843T3/es not_active Expired - Lifetime
  • 2001-05-05 US US10/258,871 patent/US6729458B2/en not_active Expired - Fee Related
  • 2001-05-05 JP JP2001582735A patent/JP5093954B2/ja not_active Expired - Fee Related
  • 2001-05-05 WO PCT/EP2001/005115 patent/WO2001086163A1/de not_active Ceased

Patent Citations (4)

Non-Patent Citations (2)

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