CN202614778U

CN202614778U - Main body structure of speed sensor

Info

Publication number: CN202614778U
Application number: CN 201220194831
Authority: CN
Inventors: 许建国; 胡进彪
Original assignee: HANGZHOU LIN'AN GUANFENG SENSOR CO Ltd
Current assignee: HANGZHOU LIN'AN GUANFENG SENSOR CO Ltd
Priority date: 2012-05-02
Filing date: 2012-05-02
Publication date: 2012-12-19
Anticipated expiration: 2022-05-02

Abstract

The utility model relates to a main body structure of a speed sensor. According to the utility model, the technical problem to be solved is that the provided structure should have the advantages of being simple in structure, easy in installation, good in air tightness, and firm in connection. The technical scheme is as follows: the main body structure of a speed sensor comprises a tubular support, a sealing ring fastened on the outer circumferential surface of the support via interference fit, a grease sealed between the support and the sealing ring, and a framework fixed on the sealing ring, wherein the left end of the support is a circular plane stretching towards an outer diameter direction; and the main body structure is characterized in that a turned edge turned towards the outer diameter direction is produced at the right end of the support, and the height of the turned edge stretching towards the outer diameter direction is 3-5 mm.

Description

A kind of agent structure of speed pickup

Technical field

The utility model relates to a kind ofly provides the element of wheel speed signal, especially a kind of speed pickup that is installed in hub to the ABS system.

Background technology

Along with the fast development of growth in the living standard and automobile industry, people more and more pay attention to the safety problem of automobile in recent years; So all cars of national requirements all will be installed anti-lock braking system (ABS) now, and abs sensor is exactly the part that this system the inside plays a crucial role.

Abs sensor is the ABS (Anti-lock Braking System anti-lock braking system) that is applied in motor vehicle; Monitor the speed of a motor vehicle by inductance sensor mostly in the ABS system; Speed pickup wherein through with the gear ring effect of rotating synchronously with wheel; Export one group of quasi sine ac signal, its frequency is relevant with wheel speed with amplitude.This output signal passes toward ABS ECU (ECU), realizes that the motion state of vehicle is judged through the electric signal that receives by the ABS system, thereby comes vehicle is carried out ANTI LOCK to brake system output signal according to motion state to taking turns the real-time monitoring of speed.

The structure of existing speed pickup is not too reasonable, and support wherein and hub assembly difficulty are bigger, waste time and energy when causing installing; And only depend on interference fit to be connected together between O-ring seal and the support, and relatively rotate owing to exist between O-ring seal and the support, cause the two loosening disengagement easily because of the magnitude of interference is less than normal.

Summary of the invention

The utility model technical matters to be solved is the deficiency that overcomes above-mentioned prior art, and a kind of improvement of speed pickup agent structure is provided, and this structure should have simple in structure, is easy to good airproof performance and the characteristics that are connected firmly are installed.

The technical scheme that the utility model provides is:

A kind of agent structure of speed pickup; Comprise tubulose support, be fastened on O-ring seal on the support outer circumference surface, be locked in the grease between support and the O-ring seal and be fixed on the skeleton on the O-ring seal through interference fit, the left end of support is the circular flat that stretches to the outer diameter; It is characterized in that: the right-hand member of said support is shaped on the flange of turnover to the outer diameter.

The height that described flange stretches to the outer diameter is 3-5mm.

The beneficial effect of the utility model is: because the right-hand member of support is an assembled end; Make the fillet that flange forms; Not only the time can play good guide effect, make assembly work become easily simple, and the sealing effectiveness after the assembling is not than better (the fat phenomenon can occur leaking) in the past in assembling; Therefore in addition, flange is axially carrying out spacingly to O-ring seal, eliminated the phenomenon generation of support and O-ring seal loose or dislocation fully.

Description of drawings

Fig. 1 is the agent structure cross-sectional schematic of the utility model.

Fig. 2 is the agent structure cross-sectional schematic of existing speed pickup.

Embodiment

The inventor realizes that through further investigation following problem appears in the agent structure of existing speed pickup when mounted easily: 1, bigger with the hub assembly difficulty, even if cross the angle also is difficult to play guiding when assembling effect; 2, because two fit dimension tolerances all adopt limit deviation; When assembling, be again random pair like this; Can run into the limit lower deviation of axle and the limit upper deviation in hole unavoidably cooperates; Can produce magnitude of interference phenomenon less than normal like this, the magnitude of interference less than normal when work high speed rotating add with the O-ring seal friction and have resistance can produce axial torsional forces, can make two cooperation place loose or dislocations when torsional forces is excessive; 3, after O-ring seal became flexible, sealing effectiveness is bad can to exist leakage fat phenomenon.

The inventor has done improvement to this, specifically combine embodiment explanation shown in the drawings.

In the agent structure of conventional speeds sensor (shown in Figure 2), support 1 in a tubular form, its left end is the circular flat (similar flange-shaped) that stretches to the outer diameter; O-ring seal 2 (elastomeric material is processed) is fastened on through interference fit and is installed on the support outer circumference surface; Owing to during duty, relatively rotate between O-ring seal and the support,, hold the grease 6 that is used to lubricate so be shaped on the space between the two; Skeleton 5 inlay card again is fixed on the O-ring seal.Said structure disposes coil and other parts (coil all omits with other parts and do not draw) again, has just constituted complete speed pickup.

The improvement of the utility model (as shown in Figure 1) is that the left end at support is shaped on the flange 3 of turnover to the outer diameter; The height that this flange stretches to the outer diameter can be confirmed (being recommended as 3-5mm) as required.

Obviously, after flange forms, can axially O-ring seal is stopped spacing, even if high speed rotating can be because of excessive generation support of moment of torsion and O-ring seal loose or dislocation phenomenon yet.And when mounted, make the formed fillet 3-1 of flange and can play effective guide effect, make installment work become easily simple more.In addition, said flange also makes between support and the O-ring seal sealing effectiveness better, has solved the grease leakage phenomenon that existing structure occurs easily.

Claims

1. the agent structure of a speed pickup; Comprise tubulose support (1), be fastened on O-ring seal (2) on the support outer circumference surface, be locked in the grease (6) between support and the O-ring seal and be fixed on the skeleton (5) on the O-ring seal through interference fit, the left end of support is the circular flat that stretches to the outer diameter; It is characterized in that: the right-hand member of said support is shaped on the flange (3) of turnover to the outer diameter.

2. the agent structure of a kind of speed pickup according to claim 1 is characterized in that the height that described flange stretches to the outer diameter is 3-5mm.