One-way clutch and starter

Abstract

The invention relates to the technical field of electric machine equipment, and discloses a one-way clutch and a starter. The one-way clutch comprises a gear, an outer race, a cover shell and an anti-rotation gasket, a plurality of wedge-shaped chambers are formed between the inner circumferential surface of the outer race and the outer circumferential surface of the gear, and the wedge-shaped chambers are filled with lubricating grease; the anti-rotation gasket comprises a metal gasket and a plastic sealing sheet which are fixedly connected, the plastic sealing sheet is evenly arranged alongthe radial thickness, the anti-rotation gasket is arranged at one end of the outer race, the cover shell covers the anti-rotation gasket and the outer race, and the anti-rotation gasket can axially seal the wedge-shaped chambers. The one-way clutch and the starter have the advantages that the plastic sealing sheet and the metal gasket are connected to form the anti-rotation gasket, the thickness of the plastic sealing sheet is uniform along the radial direction, the contact area between the cover shell and the anti-rotation gasket is increased so as to transmit more positive pressure of the cover shell to the metal gasket to increase the friction between the metal gasket and the outer race and improve the anti-torsion capability of the metal gasket, thereby achieving an effect of oil leakage prevention, the process is simplified, and the automatic feeding of the production line is facilitated.

Description

technical field [0001] The invention relates to the technical field of motor equipment, in particular to a one-way clutch and a starter. Background technique [0002] The starter is a key component of the car. It is a machine that converts the electric energy of the battery into mechanical energy to drive the flywheel of the engine to rotate to start the engine. The one-way clutch of the car starter transmits the torque produced by the motor to the flywheel on the car starter. transmission device. Different starters have different one-way clutches. Common one-way clutches include four types: roller type, friction plate type, spring type and ratchet type. Seat ring 2', housing 3' and metal gasket 4' and other components, such as figure 1 with figure 2 shown. [0003] The function of the starter transmission device is to make the drive gear 1' mesh with the flywheel gear ring when starting, and transmit the starter torque to the engine crankshaft; the speed of the flywhee...

AI Technical Summary

Problems solved by technology

[0004] In the existing structure, the friction force between the metal gasket 4' and the surface of the one-way clutch outer race 2' mainly comes from the positive pressure of the casing 3' on the metal gasket 4'. In the prior art, the plastic seal 8 ' and the metal gasket 4' are two independent parts, and the current plastic seal 8' is thick on the outer edge and thin in the middle. In actual use, only the thicker part of the plastic seal 8' is connected to the casing 3' contact, the contact area is very small, resulting in small positive pressure transmitted by the plastic seal 8' from the housing 3', resulting in a small positive pressure actually acting on the surface of the metal gasket 4', according to friction = positive pressure * friction Coefficient, the friction between the metal gasket 4' and the one-way clutch outer race 2' is small, the friction between the metal gasket 4' and the one-way clutch outer race 2' is not enough to resist the motor operation to the metal gasket When there is a torsional force in the circumferential direction of 4', the metal gasket 4' will be twisted, so that a gap will appear on the contact surface between the metal gasket 4' and the outer race 2', and the grease 5' inside the wedge-shaped chamber will seep through the gap. The internal grease 5' is reduced, the rectangular spring 6' loses its restoring force under high temperature, the roller 7' cannot return to the correct position, and the drive gear 1' slips, which eventually leads to the failure of the motor and affects the one-way clutch and The service life of the starter

[0005] Therefore, a kind of one-way clutch and starter are urgently needed to solve the problem that the friction between the metal gasket and the outer race is not enough in the prior art to cause the grease to ooze easily.

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