CN2879140Y

CN2879140Y - Sealed oil level sensor

Info

Publication number: CN2879140Y
Application number: CN 200620110067
Authority: CN
Inventors: 张嗣祥; 刘长贵
Original assignee: YUEYANG WANLI MECHANICAL PRODUCING CO Ltd
Current assignee: YUEYANG WANLI MECHANICAL PRODUCING CO Ltd
Priority date: 2006-03-08
Filing date: 2006-03-08
Publication date: 2007-03-14
Anticipated expiration: 2016-03-08

Abstract

The utility model relates to the liquid volume measuring technology, and associating a transducer of simple structure, no touch with oil media and the thick film resistor contact point are fixed in a close chamber, aiming at the existing automobile fuel volume measuring. The technical proposal adopted is: The open end of a box-shaped stand 3 with an airtight lid 10, a shaft 5 goes through the 2 wall holes on the mid-upper of the stand 3, both ends of whose go into the hole on both arms of the crank 2 like a Chinese character ''ji'', one end of the crank 2 is with a floater 1, the other end is with a magnetic iron B9, the close chamber bottom of the stand 3 is installed with a thick film resistor board 4, the shaft 5 inside the stand 3 is fixed with a contact point swivel rack 11, which is fixed with a contact spring plate with contact point 7 and a sporting arm with a magnetic iron A8, the thick film resistor board 4 is connected with a lead 6, and the conducting belt contacts with the contact point 7.

Description

A kind of closed fuel-quantity transducer

One, technical field

The utility model relates to the liquid capacity measuring technology, especially a kind of closed fuel-quantity transducer.

Two, background technology

In existing automobile oil mass measuring technology, what generally adopt is the swept resistance sensor, changes the resistance of swept resistance by the variation of fuel tank intermediate fuel oil high and low position, makes by the electric current in the fuel level gauge to change, the pointer of fuel level gauge is made corresponding mobile, reaches the purpose of indication oil mass.The two kinds of changes of using at present of sliding that have hinder, and a kind of Wound-rotor type slides and becomes resistance, another kind of thick-film resistor formula slip change resistance.

The present employed fuel-quantity transducer of electronic fuel injection engine automobile, employed is thick-film resistor formula slide rheostat, has replaced original Wound-rotor type slide rheostat with the thick-film resistor plate of ceramic matrix.Its advantage is that simple in structure, compact, easy manufacturing, cost are low.But no matter be Wound-rotor type slide rheostat fuel-quantity transducer or thick-film resistor formula fuel-quantity transducer, common defects is that rheostat or resistance, sliding contact directly contact with oily medium, because grease, the sulfide of oily medium are easy to pollution, oxidation resistance and contact surface, make its loose contact, electric conductivity variation, it is inaccurate that fuel level gauge is shown, even do not work.

Three, summary of the invention

The purpose of this utility model is to be to provide a kind of simple in structure, employing is contained in thick-film resistor, sliding contact in the chamber of a sealing, it is not contacted with oily medium, avoid the pollution and the oxidation of resistance, contact, prolong the serviceable life of fuel-quantity transducer, improved a kind of closed fuel-quantity transducer of its reliability.

The technical scheme that the purpose of this utility model adopted is, include float, pivoted arm, pedestal, the thick-film resistor plate, rotating shaft, magnet, its openend that is the pedestal of box-like has gland bonnet, it is fixedly connected that middle and upper part two cinclides of pedestal are passed in rotating shaft, insert in the hole of two arms of the pivoted arm be ∏ shape at two ends, one end of pivoted arm is fixed with float, other end device has magnet B, pedestal annular seal space inner bottom part device has the thick-film resistor plate, be with the contact swing frame on the rotating shaft axle in pedestal, device has the contact reed and the support arm that has magnet A of contact-carrying on the swing frame of contact, the thick-film resistor plate is connected with extension line, and the conduction band of thick-film resistor plate contacts with the contact.

The utility model principle of work, fuel level sensor are loaded in the fuel tank, and thick-film resistor plate, contact are loaded in the enclosed cavity of fuel level sensor, do not contact with oily medium.Float oscilaltion along with the height of oil level in the fuel tank, and the drive pivoted arm rotates around the axis, on the pivoted arm support arm magnet B is installed, magnet B rotates around the axis equally with pivoted arm, magnet A is installed on the swing frame of contact equally because the effect of magnetic force, the contact also with the contact swing frame rotate around the shaft have on the thick-film resistor plate distribute by the sensor parameters requirement with the concentric resistance conduction band in contact with radius, the contact contacts with conduction band, and resistance is transferred in the fuel level gauge circuit by lead.The variation of oil level height directly causes the variation of float position in the fuel tank, thereby the contact position of contact on conduction band changed, so its resistance value is also different.The resistance value of output is linear the change with the position of float.The resistance that has changed is directed at the oil meter electric current and changes, and the oil meter pointer is made corresponding mobile, thus the oil mass that indication has changed.

Because adopt such scheme, thick-film resistor plate, contact do not contact with measured medium, avoided grease pollution, stopped oxidation, improved reliability, prolonged serviceable life.And simple in structure, cost is low, and any change is not done in former fuel-quantity transducer installation site.

The closed fuel level sensor of the utility model can be used for the occasion that it needs the measuring liquid level height, can realize long-distance transmissions and control.

Four, description of drawings

Further specify the utility model below in conjunction with accompanying drawing.

Fig. 1 is the utility model sectional structure synoptic diagram;

Fig. 2 is the thick-film resistor plate of the present utility model structural representation that contacts with the contact.

Among the figure: the swing frame of 8-magnet A 9-magnet B 10-gland bonnet 11-contact, 1-float 2-pivoted arm 3-pedestal 4-thick-film resistor plate 5-rotating shaft 6-extension line 7-contact

Five, embodiment

As Fig. 1, shown in Figure 2, include float 1, pivoted arm 2, pedestal 3, thick-film resistor plate 4, rotating shaft 5, magnet, its openend that is the pedestal 3 of box-like has gland bonnet 10, it is fixedly connected that middle and upper part two cinclides of pedestal 3 are passed in rotating shaft 5, insert in the hole of two arms of the pivoted arm 2 be ∏ shape at two ends, one end of pivoted arm 2 is fixed with float 1, other end device has magnet B 9, pedestal 3 annular seal space inner bottom part devices have thick-film resistor plate 4, be with contact swing frame 11 in 5 of the rotating shafts in pedestal 3, device has the contact reed and the support arm that has magnet A 8 of contact-carrying 7 on the contact swing frame 11, thick-film resistor plate 4 is connected with extension line 6, and the conduction band of thick-film resistor plate 4 contacts with contact 7.

Claims

1, a kind of closed fuel-quantity transducer, include float (1), pivoted arm (2), pedestal (3), thick-film resistor plate (4), rotating shaft (5), magnet, the openend that it is characterized in that being the pedestal (3) of box-like has gland bonnet (10), it is fixedly connected that middle and upper part two cinclides of pedestal (3) are passed in rotating shaft (5), insert in the hole of two arms of the pivoted arm (2) be П shape at two ends, one end of pivoted arm (2) is fixed with float (1), other end device has magnet B (9), pedestal (3) annular seal space inner bottom part device has thick-film resistor plate (4), be with contact swing frame (11) on rotating shaft (5) axle in pedestal (3), contact swing frame (11) is gone up the support arm that device has the contact reed of contact-carrying (7) and has magnet A (8), thick-film resistor plate (4) is connected with extension line (6), and the conduction band of thick-film resistor plate (4) contacts with contact (7).