CN2458431Y - Unidirectional engaging device for automobile engine - Google Patents

Abstract

The utility model relates to a structure improvement technique for a unidirectional engaging device of a vehicle starting. The unidirectional engaging device comprises a pinion gear sleeve barrel and a drive sleeve barrel which are butted coaxially, a butting point is hooped with a torsion spring which is protected by a protective sleeve, and the drive sleeve barrel is also provided with components, such as a spring, a block bowl, etc. The utility model is characterized in that the pinion gear sleeve barrel is provided with a positioning rabbet which is provided with a positioning block sheet, and an outer ring of the positioning block sheet is embedded into the protective sleeve. The technique has the advantages of high mechanical strength, high operational reliability, long service life and low product cost, and can bear great torsion load.

Description

The overrunning clutch of motor car engine

What the utility model patent application related to is particularly auto parts machinery technical field of Motor Vehicle, relates in particular to the overrunning clutch architecture advances technology that is driven engine start in its ato unit structure by Starter.

During car engine work, drive motor by the overrunning clutch of the Starter armature axle head in its starting mechanism and finish and start work, thus its overrunning clutch structure whether rationally be directly influence it can be steady in a long-term, reliable, the key factor of proper functioning.The basic structure composition of overrunning clutch includes small gear sleeve and the active sleeve that is coaxial docking, the gear end of small gear sleeve and the engagement of engine flywheel gear ring, initiatively sleeve relies on spline to be fixedly connected on the Starter armature shaft, two docking sleeve places are provided with a sheath, hoop is provided with a torsion spring in the sheath on two sleeves, and the active sleeve is positioned at the outer end of sheath and also is provided with component such as spring and retaining bowl.Existing overrunning clutch, wherein the fixed structure of small gear sleeve and sheath is one to be protruded shoulder and realize by what be positioned at sheath inner sheath mouth place on its small gear sleeve, promptly this shoulder this accessory product processing at last with the fixedly embedded sheath in its outer ring in; The gear end of small gear sleeve is processed into by the milling machine system of milling, so the inevitable darker edge of a knife that allows that leave between gear and described shoulder of processes mode.The major defect of this type of automobile overrunning clutch is: 1. the products material waste is big, because shoulder is the maximum diameter structure of small gear sleeve, its existence is processed with regard to the blank that must select minimum diameter to be slightly larger than its shoulder diameter, so the processing bite is big, raw material expends seriously: 2. product strength is low, because of the gear that has the small gear sleeve of shoulder can only adopt milling mode processing, thereby caused the cutter relieving mouth structure, and this auto parts machinery product transmitting torque under moment runs up state, and its Milling Process mode with and the setting of cutter relieving mouth all be difficult to bear for a long time, big torque load working strength directly influences working life of this product; 3. its processing cost height because its shoulder and small gear sleeve are overall structure, carries out comparatively difficulty of cure process to shoulder, because its gear end must be handled in milling, makes its product cost high again.Owing to above reason, existing automobile overrunning clutch technology far from ideal.

The goal of the invention of the art of this patent is to provide the overrunning clutch of the motor car engine of a kind of product strength height, low cost of manufacture.

The automobile overrunning clutch that the utility model technology is invented, the content of its technological scheme is that this overrunning clutch includes small gear sleeve and the active sleeve that is coaxial docking, joint is provided with a sheath, be provided with the torsion spring of a hoop in the sheath at two sleeves, the active sleeve is positioned at the outer end of sheath and also is provided with component such as spring and retaining bowl, the major technique characteristics that the technical program is different from prior art are that the small gear sleeve is positioned at sheath port position and is provided with the positioning spigot that locating stop piece is set, and the locating stop piece outer ring embeds in the sheath.

The automobile overrunning clutch that the utility model is designed, to be arranged on the shoulder structure that in the small gear sleeve positioning spigot and locating stop piece structure this sleeve split have replaced former one, such one can be easily, individually locating stop piece is carried out required sclerosis processing, two, because this locating stop piece has replaced whole shoulder structure, can utilize the blank of reduced size to remove to produce the small gear sleeve of former model on the one hand, reduced consumption of raw materials, the cancellation of shoulder structure on the other hand, just can adopt the manufacturing process that may adopt except that milling mode at the processing of gear end gear, as the processing of cold hobbing mode, just can reduce the processing cost of product greatly, but also the load intensity of gear is obviously improved, three, since this product with new technological means realized gear end to the reasonable transition at docking sleeve place and and sheath between fixing, cancelled and allowed the edge of a knife and shoulder in the original structure, especially its geared parts adopts cold extruding processing method, the mechanical strength of this product is improved, can bear bigger commentaries on classics and turn round load, can prolong greatly working life.In addition, the friction effect face of torsion spring and two sleeves is improved to reciprocity friction effect length by original asymmetrical length, the active force that makes torsion spring act on small gear sleeve and active sleeve equates that so just guaranteed its normal transmission work, its torsion can reach more than 60 kilograms.

Concrete structure below in conjunction with accompanying drawing describes detailed content of the present utility model in detail.

Accompanying drawing is total assembling structure sectional view of automobile overrunning clutch of the present utility model.

As shown in the figure, the structure of this automobile overrunning clutch includes small gear sleeve 1 and the active sleeve 2 that is coaxial docking, the gear end of small gear sleeve 1 and the engagement of engine flywheel gear ring, initiatively sleeve 2 relies on spline to be fixedly connected on the Starter armature shaft, two sleeves, 1,2 joints are provided with a sheath 3, be provided with the torsion spring 4 of hoop at two sleeves, 1,2 outer surfaces in the sheath 3, initiatively the end of sleeve 2 outside sheath 3 also is provided with component such as spring 5 and retaining bowl 6.The sleeve outer surface of small gear sleeve 1 is provided with a delineation position seam 7, place the outer ring in this seam 7 and embed the interior locating stop piece 8 of sheath 3 ports, but this locating stop piece 8 is used to limit the motion space of torsion springs 4 in the sheath 3, it can by a plurality of constitute the arc block plate of ring or slightly the arc block plate of the conical surface form.The gear end of small gear sleeve 1 can form by the manufacturing of cold-extrusion technology method.

Claims (1)

1, a kind of overrunning clutch of motor car engine, include the small gear sleeve (1) and the active sleeve (2) that are coaxial docking, the joint of two sleeves (1,2) is provided with a sheath (3), be provided with the torsion spring (4) of a hoop in the sheath (3) at two sleeves, active sleeve (2) is positioned at the outer end of sheath (3) and also is provided with component such as spring and retaining bowl, sheath (3) the port position that is positioned at that it is characterized in that small gear sleeve (1) is provided with the positioning spigot (7) that locating stop piece (8) are set, and locating stop piece (8) outer ring embeds in the sheath (3).

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