Manufacturing method of friction double tooth structure DocumentNo.: 2 16302 19 Release date: July 2020 -2902: 38 Reading: 284 Source: National Waterway Bureau: X Technology >: Latest Patent > Engineering Parts; Adiabatic; The utility model relates to an electric starting engine, in particular to a friction double-tooth structure of the engine.
Background: Overrunning clutch belongs to one-way rotating clutch, which will be damaged by reverse rotation. Therefore, it is necessary to set a slip structure to protect the overrunning clutch. Document cn206904 188u discloses a dual gear structure that can rotate relatively, including: bearing, gear, friction plate, belleville spring, washer, gear shaft, friction plate and friction ring, wherein the gear is installed on the gear shaft through the bearing, the friction plate is installed on the gear shaft and rotates synchronously with the gear shaft, and the friction ring is installed on the gear shaft and rotates synchronously with the gear, and the friction plate and friction ring are staggered; A disc spring and a washer are installed between the two friction plates, and the two friction plates are installed on both sides of the friction plates. But the torque transmission effect of this structure needs to be further improved.
Technical realization factor: The purpose of the utility model is to provide a friction double-tooth structure with good torque transmission effect.
The purpose of the utility model is realized through the following technical scheme.
A friction double-tooth structure comprises a main shaft, a gear I and a gear II which are fitted on the main shaft and axially limited; One side of the first gear is provided with an axial extension part, and the extension part is provided with an annular boss; The annular boss is far away from the side wall of the first gear tooth and abuts against the spring, and the other end of the spring abuts against the friction pair.
Preferably, the friction pair comprises at least three driving friction plates arranged at intervals and a driven friction plate positioned between the driving friction plates.
Preferably, the friction pair comprises three driving friction plates arranged at intervals, and a driven friction plate is arranged between two adjacent driving friction plates.
Further, the inner wall of the second gear is axially provided with tooth grooves, and both end sides of the friction pair are provided with gear rings engaged with the tooth grooves.
In addition, the outer edge of the driven friction plate is provided with teeth engaged with the tooth groove.
Further, the outer side of the gear ring is provided with a retaining ring, and the retaining ring is clamped in the annular groove of the inner wall of the second gear.
Preferably, the spring is a disc spring.
Beneficial effect: due to that adoption of the technical scheme, the friction double-tooth structure of the utility model has good torque transmission effect; The friction double-tooth structure is used in conjunction with the starting motor, pneumatic gear and overrunning clutch. When the engine starts normally, the starting torque is small, and under the action of static friction, the pair rubs against the gear.
1. As a whole, gear 2 normally transmits torque. Due to the adoption of a plurality of friction plates arranged at intervals, the friction force is greater, the force transmission effect is better, and the starting effect is better; When the engine suddenly shuts down, the reverse torque of the crankshaft is very large. After the friction plate receives the rotating force, the static friction becomes the dynamic friction to make the friction plate slip, so that the overrunning clutch will not be damaged.
Fig. 1 is the first structural schematic diagram of the friction double teeth in the embodiment; Fig. 2 is a view taken along line a-a in figure 1.
The utility model will be further explained by specific examples and attached drawings. It should be pointed out here that the following examples cannot be understood as limiting the protection scope of this utility model, and some immaterial improvements and adjustments made by ordinary technicians in the field according to the contents of this utility model are all within the protection scope of this utility model.
(Photo/Text/Photo: Pacific Auto Network Q&A called Beast)