JP2541605Y2 - Rotating body fixed structure - Google Patents

Description

[Detailed description of the invention] [Industrial application field] In the invention, a shaft integrally formed with an internal rotating body built in a case is penetrated from the case and supported rotatably, and The present invention relates to an improvement in a rotating body fixing structure in which an external rotating body is crimped to an outer end.

[Prior Art] A conventional rotating body fixing structure has a configuration like the technique according to Japanese Utility Model Laid-Open No. 63-192614. That is, the internal rotating body is inserted into the case with the lid opened, the shaft is protruded from the opposite side of the case, the external rotating body is inserted into the outer end thereof, and the outer rotating body is fixed by caulking, and then the lid is closed. .

[Problems to be Solved by the Invention] However, in the above-described conventional technique, it is necessary to support one end surface of the shaft in the case at the time of caulking the shaft. Therefore, after the caulking operation, the case is turned over, and then the lid is closed.
This leads to an increase in man-hours. Further, in the conventional technique, a connection member made of a conductive plate material is provided between a terminal and a substrate, one end of the connection member is soldered to the terminal, the other end is engaged with the substrate, and soldered. ing. Attachment of the connection member is a soldering operation performed in the case, and thus has a problem that workability is poor.

Means for Solving the Problems The present invention was devised in view of the above problems, and the invention of claim 1 is based on a rotating body in which a rotor is rotatably supported by a case and a lid. The rotor has a shaft protruding in the vertical direction, the case has a substantially container shape in which a concave portion supporting the lower end of the shaft is formed on the inner bottom, and the lid closes an opening of the case. At the same time, a through-hole through which the upper side of the shaft is inserted is formed, and the lower end of the shaft is aligned with the concave portion, and the lever is fixed to the upper end by caulking.

According to a second aspect of the present invention, the case is formed by insert-molding a terminal having one end projecting into the connector and the other end projecting into the opening. The terminal is electrically conductive in the opening of the case. Forming a spring receiving portion for supporting the compression spring, wherein the lid interposes a substrate having electrodes between the case and the case, and the compression spring has an inner end formed at the other end of the terminal. One end is pressed against the spring receiving portion and the other end is pressed against the electrode.

[Operation] In the above-described configuration, after the inner rotating body is inserted into the opened case and the lid is closed, the outer rotating body is fitted to the upper end of the shaft protruding from the lid, and the urging force of the urging member is resisted. And press the upper end surface of the shaft. Since the lower end surface of the shaft contacts the bottom of the case, one end of the shaft is supported when the shaft and the external rotating body are caulked.

Therefore, according to the above-described configuration, since all the assembling operations can be performed from one direction, the assembling workability is improved and the number of assembling steps can be reduced. The connection between the terminal and the electrode of the substrate is performed by inserting a compression spring into the inner end of the terminal and closing the opening of the case with a lid via the substrate, so that the compression spring is applied to the terminal and the electrode. It is connected by pressure contact, and soldering work is not required.

[Embodiment] A preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

Reference numeral 1 denotes a case made of a resin material having a bottom portion, and an upper opening surface is covered with a lid 2 and both sides are fixed by heat caulking. An O-ring 3 is interposed between the case 1 and the lid 2 to maintain airtightness. A rotor 5 made of a resin material to which a brush 4 is fixed is built in the case 1. The rotor 5 as an internal rotating body is
A shaft of a metal material extending concentrically in the vertical direction is integrally formed by integrally forming the shaft.
The upper portion of the shaft 5a is rotatably penetrated and supported by the lid 2, and a lever 6 as an external rotating body is fixedly secured to the upper end thereof. An O-ring 7 for keeping the outer peripheral surface airtight is fitted near the upper end of the shaft 5a. The rotor 5 is urged toward the lid 2 by a wave-shaped wave washer 8 having elasticity as an urging member interposed at the bottom of the case 1. Reference numeral 9 denotes a torsion spring that holds the rotational position of the rotor 5 at a predetermined position. The lower part of the shaft 5a is inserted into a recess 1a formed in the bottom of the case 1. A substrate 10 made of a ceramic material is interposed between the case 1 and the lid 2.
On the lower surface of the substrate 10 facing the brush 4, a sliding contact resistance that comes into contact with the brush 4 as the rotor 5 rotates is provided.
11 is formed by printing. An electrode 12 is fixedly arranged at the end of the sliding contact resistor 11 as shown in FIG. Reference numeral 13 denotes a terminal provided on the connector 1b of the case 1 by integral molding. The terminal 13 has a spring receiving portion 13b formed by bending the side of the inner end 13a facing the electrode 12 to secure a contact area with a compression spring 14 described later. Reference numeral 14 denotes a conductive compression spring, which is inserted into the inner end 13a of the terminal 13 and is interposed between the spring receiving portion 13b of the terminal 13 and the electrode 12. By the way, a minute current flows between the electrode 12 and the terminal 13 as a sensor signal, and conductivity and rust prevention are taken into consideration. That is, the electrode 12 uses a clad material made of a gold surface,
The contact surfaces of the spring receiving portion 13b and the contact surfaces of the compression springs 14 of the terminal 13 are plated with gold. Further, the compression spring 14 is mounted as follows. During assembly, the compression spring 14 is inserted into the inner end 13a of the terminal 13, covered with the substrate 10, covered with the lid 2 from above, and fixed to the case 1 by thermal caulking. In this state, the terminal 13 and the electrode 12 are connected with conductivity. The caulking of the shaft 5a of the rotor 5 and the lever 6 is performed as follows. When the rotor 5 is housed between the case 1 and the lid 2, the rotor 5 is
Is biased to the side. Thus, the lower end surface of the shaft 5a is slightly raised from the bottom surface of the concave portion 1a in the case 1 as shown in FIG. The case 1 thus assembled is placed on a pedestal (not shown), and the lever 6 is inserted into the upper end of the shaft 5a. Then, by pressing the upper end of the shaft 5a, the rotor 5 descends against the urging force of the wave washer 8, and the lower end surface of the shaft 5a comes into contact with the bottom surface of the concave portion 1a to reduce the axial load during the caulking operation. Take it. In this state,
The shaft 5a is fixed to the lever 6 by caulking. Thereafter, when the pressing force from the upper end of the shaft 5a is released, the rotor 5 automatically returns by the urging force of the wave washer 8. Thus, the shaft 5a slightly rises from the bottom surface of the concave portion 1a as shown in FIG.
The rotation action of the rotor 5 is not hindered.

The urging member is not limited to the wave washer 8 and may be any member that urges the rotor 5 and the bottom of the case 1 so as to be separated from each other. In addition, the case 1 is not limited to the configuration in which the concave portion 1a is formed in the bottom portion, as long as it can support the lower end surface of the shaft 5a when pressing the upper end surface of the shaft 5a.

Next, the operation of the throttle valve opening sensor having the above-described configuration will be described.

Before installing the throttle valve opening sensor in a throttle chamber (not shown), the rotor 5 and the brush 4
Is automatically returned to a predetermined position by the action of the torsion spring 9.

When the throttle valve opening sensor is installed in the throttle chamber, the lever (not shown) of the throttle chamber is connected to the lever 6, and the brush 4 is rotated by the rotor 5 to move the surface of the sliding contact resistance 11 of the substrate 10. As a result, a resistance value corresponding to the opening of the throttle valve is obtained at the terminal 13.

The throttle valve opening sensor is connected to a subsequent engine control device and the like, and is used as a sensor for controlling the combustion efficiency of the engine and the like.

[Effects of the Invention] The present invention has the following unique effects.

(1) According to the first aspect of the present invention, since all the parts can be assembled by inserting each part in one direction from top to bottom, the assembly workability is simplified, and Can be automatically assembled, and the number of assembly steps and costs can be reduced.

(2) According to the second aspect of the present invention, the terminal and the substrate can be connected by inserting the compression spring into the inner end of the terminal and closing the lid to the case via the substrate having the electrodes, so that the terminal and the substrate can be connected. Work becomes unnecessary, and workability can be improved.

[Brief description of the drawings]

1 to 4 show one embodiment of the rotating body fixing structure according to the present invention, FIG. 1 is a vertical sectional view, FIG. 2 is a detailed enlarged sectional view of a portion A in FIG. 1, and FIG. FIG. 2 is an exploded perspective view of a main part around a compression spring, and FIG. 4 is an exploded perspective view of the configuration of FIG. 1 ... case, 1a ... recess, 2 ... lid, 4 ... brush,
5 ... rotor, 5a ... shaft, 6 ... lever, 8 ... wave spring, 9 ... torsion spring, 10 ... board.

Claims (2)

(57) [Scope of request for utility model registration] 1. A rotating body in which a rotor (5) is rotatably supported by a case (1) and a lid (2), wherein the rotor (5) has a shaft (5a) projecting vertically. The case (1) is formed in a substantially container shape having a concave portion (1a) that supports the lower end of the shaft (5a) at the inner bottom thereof, and the lid (2) is an opening of the case (1). And a through hole is formed through which the upper side of the shaft (5a) is inserted. The shaft (5a) has a lower end aligned with the concave portion (1a) and a lever (6) at the upper end. A rotating body fixed structure characterized by being fixed. 2. The case (1) is insert-molded with a terminal (13) having one end protruding into the connector portion (1b) and the other end protruding into the opening. A spring receiving portion (13b) for supporting a conductive compression spring (14) is formed in an opening of the case (1), and the lid (2) is provided between the case (1) and an electrode ( 1
The compression spring (14) is inserted through an inner end (13a) formed at the other end of the terminal (13), and has one end connected to the spring receiving portion ( The rotating body fixing structure according to claim 1, wherein the rotating body is fixed to the electrode (12) by pressing against the electrode (12).