Synchronizer for speed reducer
OwnerKazuyoshi Hiraiwainventor
Life of this patent
Estimating the term…
Abstract
The synchronizer apparatus have a hub set on the shaft, a sleeve supported at the outside of the hub and engaged together, a sift gear with a clutch gear engageable with the sleeve, a synchronizer ring with friction surface, the lever members multiplying a force from the sleeve by using leverage and transmitting its multiplied force to the synchronizer ring. The lever members are disposed in a cut-off portions of the hub. Therefore, the apparatus become compact, eliminating a space for setting the lever members, and minimize the effect on a shift operation force, for the lever members are formed slmall to reduce the centrifugal force acting on them.
Claims6
A synchronizer apparatus for a transmission comprising:
- a shaft transmitting a torque,
- a hub having a boss set on the shaft and a flange portion extending outward in a radial direction from the boss, the flange portion having a spline on the peripheral side of the flange portion,
- a sleeve having a spline on the inner side of the sleeve, the spline of the sleeve being meshed with the spline of the hub and supported to slide in regard to the hub,
- a shift gear integrally having a clutch gear to mesh with the sleeve and a friction surface for a synchronization at the hub side of the shift gear,
- a synchronizer ring having a friction surface to be pressed to the friction surface of the shift gear,
- a plurality of lever members disposed between the sleeve, the hub and the synchronizer ring, the lever members functioning as a lever to multiply a pushing force of the sleeve toward the shift gear to transmit the multiplied force to the synchronizer ring,
- the hub having a plurality of cut-off portions, the cut-off portions being formed at the flange portion extending to the peripheral side and having side surfaces parallel to each other,
- the lever members being disposed in the cut-off portions and biased outward in the radial direction to contact the sleeve and having a plurality of surfaces slidable on the side surfaces the cut-off portions.
A synchronizer apparatus for a transmission comprising:
- a shaft transmitting a torque,
- a hub having a boss set on the shaft and a flange portion extending outward in a radial direction from the boss, the flange portion having a spline on the peripheral side of the flange,
- a sleeve having a spline on the inner side of the sleeve, the spline of the sleeve being meshed with the spline of the hub and supported to slide in regard to the hub,
- a shift gear integrally having a clutch gear to mesh with the sleeve and a friction surface for a synchronization at the hub side of the shift gear,
- a cone ring rotatable together with the clutch gear and having inner and outer friction surfaces on an inner and outer side of the cone ring,
- an inner ring which can contact the inner ring with an allowance in a radial direction, the inner ring having a friction surface to be pressed to the inner friction surfaces of the cone ring,
- a synchronizer ring which can contact the hub with an allowance in a radial direction, the synchronizer ring having a friction surface to be pressed to the outer friction surface of the cone ring,
- a plurality of lever members disposed between the sleeve, the hub and the synchronizer ring, the lever members functioning as a lever to multiply a pushing force of the sleeve toward the shift gear to transmit the multiplied force to the synchronizer ring so that a force acting on a fulcrum of the lever members is transmitted to the hub through the inner ring.
Dependencies are inferred from the claim text.