JPH0712974U - Pulsar ring - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a pulsar ring that can be mass-produced, is low in cost, and is compact and lightweight. [Structure] An inner ring (6) made of a steel plate and an outer ring (7) made of a steel plate fitted on the outer side of the inner ring (6) are formed, and the outer ring (7) is arranged at equal intervals around the circumference. , Cut-and-raised parts (7c) extending in the outer diameter direction are arranged in a line in a dotted manner,
The ends of the inner and outer rings (6) and (7) were axially fixed by flanges (6a) (6b) (6c) (7f) formed on either side.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a pulsar ring, and more particularly to a pulsar ring for a detection device for detecting the rotational speeds of front wheels and rear wheels for controlling an automobile by an antilock brake system (hereinafter referred to as ABS).

[0002]

[Prior art]

 The ABS of a car controls the braking force according to the number of rotations of the front and rear wheels during brake operation to prevent the wheels from locking and prevent the car from skidding. , A detection device that detects the number of rotations of the front and rear wheels is required.

FIG. 4 shows that a gear-shaped pulse gear (3) is press-fitted and fixed to the outer periphery of the outer ring (2) of the wheel bearing device (1) at a position corresponding to the outer peripheral surface of the pulse gear (3). It has a structure in which the electromagnetic sensor (4) is arranged.

The conventional pulse gear (3) is manufactured by cutting steel or using an iron-based sintered alloy, and has a structure in which the surface thereof is subjected to anticorrosion treatment if necessary.

[0005]

[Problems to be solved by the device]

 However, the pulse gear made of steel or iron-based sintered alloy as described above has a problem that the sectional height is high, the weight is heavy, and the material and the processing cost are high.

The present invention has been made in order to solve the above problems, and an object thereof is to provide a pulsar ring that can be mass-produced, is low in cost, is compact, and is lightweight. .

[0007]

Means for Solving the Problems To achieve the above object, the present invention comprises an inner ring made of a steel plate and an outer ring made of a steel plate fitted to the outside of the inner ring, the outer ring being The cut-and-raised parts extending in the outer diameter direction are arranged at equal intervals around the circumference in a gear shape, and the ends of the inner and outer rings are fixed in the axial direction by flanges formed on either side. is there.

[0008]

[Action]

 By fitting the inner ring and the outer ring, which are formed by press-molding a steel plate, inside and outside, and providing the cut-and-raised part of the outer ring, the thickness of the teeth can be minimized and the height can be maximized. Therefore, the detection output can be increased.

[0009]

【Example】

 An embodiment of the present invention will be described below with reference to FIGS. 1 (A) and 1 (B) of the accompanying drawings.

As shown in the figure, the pulsar ring (5) is composed of a combination of an inner ring (6) made of a steel plate and an outer ring (7) made of a steel plate fitted on the outer side of the inner ring (6). The inner ring (6) and the outer ring (7) are separately pressed, and then the two are combined.

The inner ring (6) is made of corrosion-resistant magnetic stainless steel and is pressed into a cylindrical shape as shown in FIGS. 1 (A) and 2 (D). The outer ring (7) is made of the same magnetic stainless steel and is pressed into a cylindrical shape, as shown in Fig. 2 (C), and has U-shaped slits (7a) at equal intervals in the circumferential direction. And a cut-and-raised part (7c) formed by bending the tongue (7b) is arranged in a gear shape on the outer periphery.

A flange (6a) extending toward the outer diameter side is formed at one end of the inner ring (6) to position the outer ring (7) in the axial direction. Further, the other end of the inner ring (6) is fitted to the outer ring (7) and then bent toward the outer diameter side, and similarly to the above, the axial positioning flange (6b) of the outer ring (7). Becomes The inner and outer rings (6) and (7) can be fixed in the circumferential direction by integrally crimping with a punch or the like to provide the fixing portion (8). In this way, by enclosing the outer ring (7) with the flanges (6a) (6b) at both ends of the inner ring (6), the progress of rust on the outer ring (7) can be delayed.

Next, the processing steps of the pulsar ring (5) will be described with reference to FIGS. U-shaped slits (7a) are formed at equal intervals in the circumferential direction of the material (7d) of the outer ring (7) press-formed into a cylindrical shape, and the tongue (7b) is bent to the outer diameter side. To form the cut and raised portion (7c). On the other hand, the inner ring (6) is formed in a cylindrical shape having a flange (6a) at one end and is fitted to the inner diameter side of the outer ring (7). After that, the other end of the inner ring (6) is bent to the outer diameter side to form a flange (6b), and the outer ring (7) is axially positioned by both flanges (6a) and (6b). . Finally, the inner and outer rings (6) and (7) are circumferentially fixed by the fixing portion (8) which is integrally crimped with a punch or the like.

FIGS. 3A and 3B show a second embodiment of the present invention, and the same reference numerals are given to the same portions and the same parts, and the description thereof will be omitted. In the second embodiment, the cut-and-raised portion (7c) has an H-shaped slit (7e) formed in the cylindrical outer ring (7), and the tongue piece (7b) is removed in the same manner as in the first embodiment. Bend to the radial side to make.

FIG. 3C shows a third embodiment of the present invention, in which the inner ring (6) has a flange (6a) on the outside and the outer ring (7) has an inner flange (7f). Formed and integrated in the axial direction.

FIG. 3D shows a fourth embodiment of the present invention, in which the cut-and-raised part (7c) of the outer ring (7) forms an L-shaped slit (7g), which corresponds to the first embodiment. Similarly, the tongue piece (7b) is bent to the outer diameter side to form a comb-like shape. At one end of the inner ring (6), toothed flanges (6c) that engage between the cut-and-raised parts (7c) of the outer ring (7) are formed at equal intervals in the circumferential direction, and the inner and outer rings (6) are ) Fix (7) in the circumferential direction.

It is said that the output of the pulsar ring is greater as the width of the gear is smaller and the height is higher. In addition, it is larger when the pocket has a bottom and the outer diameter of the gear has an edge. Therefore, the output of the pulser ring can be improved by selecting the plate thickness of the inner and outer rings (6) and (7), the width and height of the gear, and the like. Further, as the constituent material of the inner and outer rings (6) and (7), a material having high magnetic permeability may be selected.

[0018]

[Effect of device]

 According to this invention, the pulsar ring can be manufactured only by press working using a steel plate, productivity can be improved, cost can be reduced, and further, the weight and the output can be greatly improved. it can. Further, the pitch accuracy and the inner and outer diameters of the ring are good, and even if a stone or a foreign object collides with the gear, it has rigidity and is not deformed. When stainless steel is used, it is possible to prevent rust on the mounting side shaft from proceeding and affecting the gear.

[Brief description of drawings]

FIG. 1A is a perspective sectional view of an essential part showing a first embodiment of a pulsar ring according to the present invention, and FIG. 1B is a longitudinal sectional side view of the essential part obtained by cutting it along the circumferential direction.

2A to 2F are explanatory views showing an example of processing steps of the first embodiment of the pulser ring according to the present invention.

FIG. 3 (A) is a perspective sectional view of an essential part showing a second embodiment of the pulsar ring according to the present invention, (B) is a longitudinal sectional side view of the essential part obtained by cutting it along the circumferential direction, (C). ) And (D) are perspective sectional views of essential parts showing third and fourth embodiments of the pulsar ring according to the present invention.

FIG. 4 is a vertical cross-sectional view showing a usage state of a conventional pulser ring.

[Explanation of symbols]

 5 Pulsar ring 6 Inner ring 6a, 6b, 6c Flange 7 Outer ring 7a, 7e, 7g Slit 7b Tongue 7c Cut and raised part 7f Flange 8 Fixed part

Claims (1)

[Scope of utility model registration request] 1. An inner ring made of a steel plate and an outer ring made of a steel plate fitted to the outer side of the inner ring, wherein the outer ring has cut-and-raised portions extending in the outer radial direction at equal intervals around the circumference. A pulsar ring, characterized in that the inner and outer rings are arranged side by side in a gear shape, and the ends of the inner and outer rings are axially fixed by flanges formed on either side.