JPH0712973U - 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] A plurality of thin plate ring-shaped tooth members (7b) having a plurality of teeth (7a) on the outer diameter are laminated by aligning the positions of respective teeth (7a), and a pulse generating member (7) made of a steel plate The pulser ring (5) is fitted to the inner diameter of the generating member (7) and the cylindrical inner ring (6) made of a steel plate in which the pulse generating member (7) is sandwiched by the flanges (6a) (6b) at both ends. Configured.

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. 2 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 In order to achieve the above object, the present invention is directed to a pulse generator made of a steel plate in which a plurality of thin plate ring-shaped tooth members having a plurality of teeth on the outer diameter are laminated by aligning the positions of the teeth. A pulsar ring is constituted by a member and a cylindrical inner ring made of a steel plate fitted into the inner diameter of the pulse generating member and sandwiching the pulse generating member by flanges at both ends.

[0008]

[Action]

 A thin plate ring-shaped tooth member with multiple teeth on the outer diameter can be mass-produced by press forming a steel plate, and this is laminated as a pulse generating member, and this pulse generating member is sandwiched by the inner ring. The tooth thickness and tooth height can be set freely, and the detection output can be maximized.

[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 a steel plate inner ring (6) and a steel plate pulse generating member (7) fitted on the outer side of the inner ring (6). The inner ring (6) and the pulse generating member (7) are separately pressed, and then the two are combined.

As shown in FIG. 1A, the inner ring (6) is made of a corrosion-resistant magnetic stainless steel and is pressed into a cylindrical shape. Similarly, the pulse generating member (7) is made of magnetic stainless steel, and as shown in FIG. 1 (B), as a thin plate ring-shaped tooth member (7b) having a plurality of teeth (7a) at an equal pitch on the outer diameter. This thin plate ring-shaped tooth member (7b) is pressed and laminated by aligning the positions of the teeth (7a).

The inner ring (6) is fitted to the inner diameter of the pulse generating member (7) in which a plurality of tooth members (7b) are laminated, and both ends or one end of the inner ring (6) is bent to the outer diameter side. Then, the flanges (6a) and (6b) are formed, and the pulse generating member (7) is sandwiched and fixed by the flanges (6a) and (6b) to form the pulsar ring (5). Since the pulse generating member (7) is sandwiched by the flanges (6a) and (6b) of the inner ring (6) from both ends in the axial direction, displacement in the circumferential direction is prevented. Further, since the inner ring (6) is sandwiched between the flanges (6a) and (6b) as described above, the progress of rust on the pulse generating member (7) can be delayed.

The tooth width t and the tooth height h of the tooth member (7b) can be processed into appropriate dimensions by press working. The larger the tooth width t of the tooth member (7b) and the higher the tooth height h, the greater the detection output. Therefore, it can be said that the structure of this embodiment has a high degree of freedom in design.

If a thin plate is selected as a constituent material of the tooth member (7b), it is possible to increase the number of teeth (7a) and reduce the pitch p. Further, as the constituent material of the tooth member (7b), a material having high magnetic permeability may be selected.

[0015]

[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 is good, and even if a stone or a foreign object collides with a tooth, it has rigidity and is not deformed. And, by using stainless steel, it is possible to prevent the rusting of the mounting side shaft from affecting the teeth.

[Brief description of drawings]

FIG. 1A is a perspective sectional view of an essential part of a pulsar ring according to the present invention, and FIG. 1B is an enlarged front view of an essential part of a tooth member constituting the pulsar ring.

FIG. 2 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 Flange 7 Pulse generating member 7a Tooth 7b Tooth member

Claims (1)

[Scope of utility model registration request] 1. A pulse generating member made of a steel plate, wherein a plurality of thin plate ring-shaped tooth members having a plurality of teeth at an equal pitch on the outer diameter are laminated by aligning the positions of the respective teeth, and fitted to the inner diameter of the pulse generating member. A pulser ring comprising a steel plate cylindrical inner ring in which the pulse generating member is sandwiched between flanges at both ends.