KR100336062B1 - Throttle position sensor - Google Patents

Abstract

The present invention relates to a throttle position sensor in which each component is improved to a simplified and lighter structure.

The configuration includes a housing in which one side is opened, a rotor rotatably received inside the housing, and a brush installed at an upper side thereof, a molding coupled to an opened side of the housing, and a substrate formed on an inner side thereof, thereby forming a rotor on the substrate. The resistor is contacted with the brush of the printing is provided with a cover which is inserted into the electrode terminal protruding partly outward, and a return spring accommodated in the housing to provide a one-way elastic bias force to the rotor.

The substrate of the cover prints a resistor having a variable resistance value on the outer side, and the electrode terminal is coked with the housing terminal formed inside the housing and then epoxy molding is performed thereon.

The present invention facilitates the assembly and manufacturing process, can reduce the number of parts to reduce the cost, and also improve the airtightness by preventing the inflow of moisture or foreign matter.

Description

Throttle Position Sensors {THROTTLE POSITION SENSOR}

The present invention relates to a throttle position sensor, and more particularly, to a throttle position sensor capable of improving weight and position sensing performance by reducing assembly structure and number of parts.

In general, the throttle position sensor (hereinafter, abbreviated as TPS) has a function of detecting an opening angle of a throttle valve, converting an intake amount of external air according to the opening angle into a signal, and outputting the signal to the ECU.

The intake apparatus of a conventional engine, with reference to FIG. 1, is connected to an accelerator rod 6 for transmitting the hinge movement of the accelerator pedal 8 in a linear movement, and a cable 4 wound at the end of the accelerator rod 6. And a throttle body 1 having a built-in throttle shaft 5 and a throttle shaft and a throttle valve (not shown) coupled to rotate in conjunction with the accelerator lever 5, and one of the throttle bodies 1. It is composed of a TPS (2) and the like coupled to the side to detect the opening angle of the throttle valve and transmit it as a signal to the ECU.

In this operation, when the pedal pedal 8 is pressed, the accelerator rod 6 and the cable 4 are pulled, and the accelerator lever 5 is rotated, and the throttle valve is opened according to the rotation of the accelerator lever 5. Outside air flows into the engine.

The opening angle of the throttle valve is detected by the TPS 2 and transmitted to the ECU, and the ECU can control the state of the engine by grasping the amount of external air delivered from the TPS 2.

Conventional TPS can be classified into a drive shaft guide fixed type, a drive shaft guide type, a drive lever type, etc. according to the coupling structure with the sensor drive shaft, dual drive shaft guide type TPS as shown in Figure 2, the housing terminal (A1) A housing A inserted and rotatably housed inside the housing A, the rotor B guiding the drive shaft and the brush B1 installed upward, and seated on the upper side of the rotor B. It is composed of an electrode assembly (C) having a resistor fixed to the contact with the brush (B1), and a cover (D) provided on the upper side of the electrode assembly (C) to block foreign matter.

In addition, the return spring (E) is accommodated inside the housing (A) to impart an elastic force to the rotor (B) to eliminate the gap between the throttle opening and the rotor (B) to have the same opening. The wave washer F is interposed between the rotor B and the housing A to cushion the axial thrust load, and the electrode terminal C1 of the housing terminal A1 and the electrode assembly C is soldered or spotted. It is integrally joined by welding.

In addition, the drive lever type TPS, as shown in Figure 3, coupled to the outer surface of the housing 10 and the rotary lever 20 is coupled to interlock with the drive lever of the throttle body not shown in the accompanying drawings, The shaft 25 is fitted to the end of the rotary lever 20 and is received to be rotatable inside the housing 10 and the rotor 60 is integrally coupled to the outer circumferential surface, and the rotation of the rotor 60 The electrode assembly 30 is contacted and energized at a predetermined time, and is inserted into one side of the housing 10 to output the energized signal to the outside, and is soldered with the electrode terminal 32 of the electrode assembly 30. It consists of a housing terminal 40 which is connected by spot welding and outputs a signal to the ECU.

The electrode assembly 30 is printed with a resistor for detecting a variable resistance value when the electrode assembly 30 comes into contact with the rotor 60 on one side thereof.

In addition, the cover 50 is fixed to one side of the housing 10 by heat fusion or welding to prevent the inflow of foreign matter.

The rotor 60 is integrally formed with the shaft 25 and is riveted to the rotary lever 20 to which the rotational force of the throttle body is transmitted, and the opening of the brush 62 and the throttle body by elastic force on the lower side thereof. The return spring 72 is installed to be kept constant.

In addition, an O-ring 74, which is a sealing material for maintaining airtightness, is interposed between the outer circumferential surface of the shaft 25 and the inner surface of the housing 10, and between the rotor 60 and the housing 10 in the axial direction. A wave washer 76 is interposed to dampen the thrust load.

This conventional TPS has a disadvantage in that the manufacturing and assembly processes are complicated because each independent component is assembled by welding or soldering.

In addition, the O-ring is installed to maintain the airtightness of the product, there is a disadvantage that the manufacturing cost is increased by adding a component for maintaining a constant contact force between the brush and the electrode assembly.

In addition, even when the sealing material is installed for maintaining the airtightness, there is a problem of incorrect assembly during assembly of parts or foreign matter or moisture introduced into the interior due to component damage, thereby lowering the reliability of the product.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and an object thereof is to provide a throttle position sensor capable of improving the reliability of a product while simplifying an assembly process by improving a component structure.

1 is a perspective view showing an intake apparatus of a conventional vehicle.

2 is a cross-sectional view showing an example of a conventional throttle position sensor.

3 is a cross-sectional view showing another example of a conventional throttle position sensor.

4 is a sectional view showing a throttle position sensor according to the present invention;

Figure 5 is a bottom view showing the molding process of the cover of the present invention,

Figure 5a shows a state in which the terminal integrally molded to the cover is coupled,

5B is a bottom view of the resistor and the cut terminal printed on the cover;

Figure 6 is a schematic cross-sectional view showing a coupling structure of the electrode terminal and the housing terminal of the present invention.

Explanation of symbols on the main parts of the drawings

100 housing 110 housing terminal

200: rotor 210: brush

300: cover 310: electrode terminal

320: substrate 400: return spring

The present invention for achieving the above object is a housing that is open one side and the housing terminal is inserted into the installation;

A rotor rotatably received in the housing and having a brush installed on the upper side thereof;

A cover which is molded in one open side of the housing and integrally formed with a substrate contacting the brush of the rotor on an inner side thereof, and having an electrode terminal partially protruded outward;

It is characterized in that it is provided with a return spring that is accommodated in the interior of the housing to impart axial elastic bias force and rotational elastic force to the rotor at the same time.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The throttle position sensor according to the present invention, as shown in Figs. 4 and 5, the housing 100 is open at one side, rotatably received inside the housing 100 and the brush 210 is installed on the upper side The electron 200 and a resistor coupled to the open side of the housing 100 and molded on the inner surface of the substrate 320 are contacted with the brush 210 of the rotor 200 on the substrate 320. And a cover 300 in which the electrode terminal 310 protruding outwardly is installed, and a return spring 400 accommodated in the housing 100 to impart axial and rotational elastic biasing force to the rotor 200. ) Is provided.

In addition, a housing terminal 110 for outputting a detection value according to the opening angle of the throttle to the ECU is inserted outside the housing 100. The housing terminal 110 and the electrode terminal 310 are illustrated in FIG. 6. As in, the housing terminal 110 is coupled to the caulking (CAULKING) to surround the electrode terminal (310).

In addition, the substrate 320 integrally formed on the inner surface of the cover 300 may be used by applying a resistor (resist liquid in a liquid state) having a resistance value that varies depending on the rotation angle of the rotor 200.

The outer edge of the cover 300 is molded in an epoxy resin and fixed to the open side of the housing 100, and the housing terminal 110 and the electrode terminal 310 are also molded together.

The return spring 400 is installed on the lower side of the rotor 200 to maintain contact force between the brush 210 and the substrate 320 of the cover 300, and impart a restoring elastic force to the rotor 200. Designed as a torsion spring with compression to absorb axial thrust.

In addition, as shown in FIGS. 5A and 5B, the electrode terminal 310 integrally forms one end with the substrate 320 of the cover 300 and the other end protruding out of the cover 300 after integrally molding the respective terminals. After cutting and banding the parts, the terminal is separated into respective terminals, and after the resistor is printed on the cover 300, the caulking operation is performed to wrap the protruding part in the housing terminal 110.

The operation of the throttle position sensor of the present invention having such a configuration is as follows.

First, the assembling process of each component will be described. After assembling the return spring 400 and the rotor 200 inside through an opened side of the housing 100, the cover 300 may be disposed above the rotor 200. Secure the seat.

After caulking to wrap the other end of the electrode terminal 310 inserted into the cover 300 with the housing terminal 110, the outer circumference of the cover 300 is molded at the same time with epoxy resin to bond the inside airtightness. Keep it.

Therefore, in the present invention, not only the internal airtight problem can be solved by epoxy molding the caulking and the housing terminal, but also the strength and airtightness can be improved.

In the throttle position sensor of the present invention as in the above embodiment, the rotor 200 is rotated according to the opening degree of the throttle, and then the brush 210 contacts the substrate 320 of the cover 300 to the variable resistance value. The signal signal is input to the ECU through the electrode terminal 310 and the housing terminal 110.

The throttle position sensor according to the present invention described above is molded by coupling the cover 300 in which the resistor and the electrode terminal 310 are integrally formed to the outer surface of the housing. Accordingly, the present invention has the following effects.

First, since it has a simplified structure by omitting components such as an electrode assembly, a wave washer, and an O-ring, the assembly process is facilitated, and the cost is reduced and the weight is reduced.

Second, since the outer peripheral surface of the caulking portion and the cover of the housing terminal and the electrode terminal is molded at the same time, it satisfies the caulking portion strength and prevents the inflow of moisture or foreign matter to improve the airtightness.

Third, since the integrally formed terminal is manufactured through cutting and bending after being integrated into the cover, workability in the manufacturing process is improved.

Claims (4)

A housing 100 having one side opened and a housing terminal 110 inserted therein; A rotor 200 rotatably received in the housing 100 and having a brush 210 installed on an upper side thereof; The substrate 320, which is molded in one open side of the housing 100 and contacts the brush 210 of the rotor 200, is integrally formed on the inner side thereof, and an electrode terminal 310 partially protruded outward is inserted. Cover 300 is installed, Throttle position sensor, characterized in that provided with a return spring (400) accommodated inside the housing (100) to simultaneously impart axial and rotational elastic biasing force to the rotor (200). The throttle position sensor according to claim 1, wherein the housing terminal (110) and the electrode terminal (310) are caulked. The throttle position sensor according to claim 1, wherein a substrate for outputting a variable resistance value is printed on an outer surface of the substrate (320) according to the rotation angle of the rotor (200). 3. The throttle position sensor according to claim 2, wherein the cover (300) is simultaneously molded by epoxy resin on one side of the edge portion and the caulking portion of the housing (100).