JPH0744756Y2 - Distributor for internal combustion engine ignition - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to an internal combustion engine ignition distributor having a centrifugal advance mechanism.

[Conventional technology]

4 to 6 show an internal combustion engine ignition distributor having a conventional centrifugal advance mechanism, FIG. 4 is a sectional view of a general internal combustion engine ignition distributor, and FIG. 5 is its centrifugal advance angle. FIG. 6 is a plan view of the advance plate of the mechanism, and FIG. 6 is a sectional view showing a state in which the advance plate is fixed to the advance sleeve. In the figure, (1) is a shaft, (2) is a base of a centrifugal advance mechanism fixed to the shaft (1), (3) is a weight pivotally supported by the base, and (4) is concentric with the shaft (1). An advance sleeve loosely fitted to the advance sleeve, (5) an advance plate fixedly supported by the advance sleeve (4), and (6) for slidably receiving the pin at the free end of the weight (3). The slot (9) is a portion where the advance sleeve (4) and the advance plate (5) are welded.

The conventional distributor for ignition of an internal combustion engine having a centrifugal advance mechanism is constructed as described above, and when the shaft (2) is rotated by the shaft (1) which is rotated in synchronization with the internal combustion engine (not shown), the weight is reduced. The advance plate (5) rotates via the pin of (3), and the advance sleeve (4) rotates accordingly. The weight (3) receives a centrifugal force and pivots in accordance with the rotation speed of the shaft (1), thereby advancing the relative rotational angle position of the advance sleeve (4) with respect to the shaft (1).

[Problems that Invention devises to solve]

In the conventional centrifugal advance mechanism as described above, the advance plate (5) is welded and joined (9) to the advance sleeve (4), so that the plate (5) bends due to its thermal strain. And transform. Therefore, there is a problem that an error occurs in the assembly process and stable centrifugal advance characteristics cannot be secured.

The present invention has been made to solve such a problem, and obtains a centrifugal advancing mechanism in which the advancing plate (5) is fixed to the advancing sleeve (4) without being subjected to thermal strain in the assembly process. The purpose is to

[Means for solving problems]

The internal combustion engine ignition distributor according to the present invention has a plurality of recesses defined by side walls provided around the hole of the advance plate and extending at right angles to both end faces of the advance plate, and an advance angle. A protrusion provided on the advance sleeve such that the one end surface of the advance plate is in contact with the abutment portion provided on the sleeve and the step is higher than the other end surface of the advance plate. Is plastically deformed over the entire circumference of the hole by caulking with high spin, and the plastically deformed portion and the contact portion cooperate to sandwich the advance plate and a part of the plastically deformed portion. It is provided with a projecting portion for preventing the advance plate from coming off in the axial direction and preventing rotation in the rotational direction by biting into the recess.

[Action]

In this invention, since the advance plate is fixed to the advance sleeve by high-spinning crimping without welding, the advance plate does not bend during assembly. Further, the high spin caulking simultaneously prevents the advance plate from coming off in the axial direction and the rotation direction, and plastically deforms the protruding portion of the advance sleeve to bring the advance sleeve and the advance plate into close contact with each other over a wide range. .

〔Example〕

1 to 3 show an embodiment of the present invention. FIG. 1 is a plan view of an advance plate, and FIG. 2 shows a state in which the advance plate is fixed to an advance sleeve by high spin caulking. The bottom view and FIG. 3 are sectional views taken along the line III-III in FIG. In the figure, (4) to (7) are the same as the conventional one. (7 ') is a recess provided in the hole (7) for accommodating the advance sleeve (4), and (8) is the advance sleeve (4).
The protruding end (4 ') is a portion plastically deformed by high spin caulking. The side wall defining the contour of the recess (7 ') extends at right angles to the front and back surfaces of the advance plate.

In the centrifugal advance mechanism configured as described above, the advance plate (5) is fixed to the advance sleeve (4) by high spin caulking. When the projecting end (4 ') of the advance sleeve is plastically deformed by the high spin caulking, a part thereof enters the recess (7'), and it is between the advance sleeve (4) and the advance plate (5). A more reliable detent is achieved.

The high spin caulking allows the entire circumference end of the advance sleeve to be gradually plastically deformed without impairing the roundness of the sleeve, and part of the circumference end of the advance sleeve is moved to the recess of the advance plate. As a result, it is possible to sufficiently contact the portion where the side wall of the recess intersects the face of the advance plate at a right angle.

[Effect of device]

As described above, in the present invention, since the advance plate is fixed to the advance sleeve by the high spin caulking without the conventional welding, the advance plate is not deformed. Further, the high spin caulking simultaneously prevents axial advancement of the advancing plate and rotation direction detent, and plastically deforms the protruding portion of the advancing sleeve to bring the advancing sleeve and the advancing plate into close contact with each other over a wide range. Therefore, there is an effect that the accuracy of the advance plate can be secured and stable centrifugal advance characteristics can be obtained. Further, since the recess can be formed by pressing or the like, it is easy to manufacture.

[Brief description of drawings]

FIG. 1 is a plan view showing an example of an advance plate used in the centrifugal advance mechanism of the present invention, and FIG. 2 shows a state in which the advance plate of FIG. 1 is fitted into an advance sleeve and fixed by caulking. The bottom view shown in FIG. 3, FIG. 3 is a sectional view taken along the line III-III in FIG. 2, FIG. 4 is a sectional view showing a general internal combustion engine ignition distributor having a centrifugal advance mechanism, and FIG. FIG. 6 is a plan view of an advance plate (5) used in a conventional centrifugal advance mechanism, and FIG. 6 is a sectional view showing a conventional manner in which the advance plate of FIG. 5 is fixed to a shaft. In the figure, (4) is an advance sleeve, (5) is an advance plate, (7 ') is a recess, and (8) is a high spin caulked portion. In the drawings, the same reference numerals indicate the same or corresponding parts.

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Tsuyoshi Takahashi 840 Chiyoda-cho, Himeji-shi, Hyogo Prefecture Mitsubishi Electric Corporation Himeji Manufacturing (56) References JP 54-74039 (JP, A) Actual development Sho 56- 165102 (JP, U) Actually opened 61-22952 (JP, U)

Claims (1)

[Scope of utility model registration request] 1. An internal combustion engine ignition power distributor having a centrifugal advance mechanism, wherein an advance sleeve is inserted into a hole of the advance plate and the advance plate and the advance sleeve are connected to each other. A plurality of recesses defined by side walls provided around the holes of the plate and extending at right angles to both end faces of the advance plate, and the advance plate on the contact portion provided on the advance sleeve. Is a protrusion provided on the advance sleeve so that one end face of the advance plate is higher than the other end face of the advance plate, and the protrusion of the hole is formed by high spin caulking. By plastically deforming over substantially the entire circumference, the plastically deformed portion and the abutting portion cooperate to clamp the advance plate, and part of the plastically deformed portion bites into each recess. Axial release of the advance plate Because and an internal combustion engine ignition distributor, characterized in that a projecting portion for rotating direction detent simultaneously.