JPH0594770U - Rotation sensor - Google Patents

Abstract

(57) [Summary] [Purpose] The code clamper is fixed to the rotation sensor without rattling. A cord clamper 22 is formed of a metal plate material, and a clamp portion 35 that holds the output cord 20 and a bag-shaped crowned portion 36 that is crowned to the end surface of the body 15 are formed. A pair of engagement legs 37 is formed on the crown attachment portion 36 by hanging it from both sides thereof. On the other hand, engagement walls that engage with the engagement legs 37 are formed on both sides of the body 15. Two crimp portions 41 and 42 are formed on each side of the crown clamp portion 36 of the cord clamper 22. On the other hand, the body 1
On both sides of 5, concave grooves for crimping the crimp portions 41 and 42 are formed. The upper wall and the lower wall in the groove are each formed as an inclined surface.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a rotation sensor, and more particularly to a rotation sensor for a vehicle equipped with a cord clamper.

[0002]

[Prior Art]

 This type of rotation sensor is generally installed near the wheel by facing a gear wheel that is provided coaxially with the wheel. To the measuring device. The cord is fixed to the rotation sensor in a predetermined direction by a cord clamper. As means for fixing the cord clamper to the rotation sensor, various means such as screw tightening and caulking are used. The method of is adopted.

[0003]

[Problems to be solved by the device]

 Since the rotation sensor is mounted near the wheels in this way, it is susceptible to vibrations and impacts, and in order to securely hold the cord, the cord clamper must be resistant to vibration and impact. It is necessary to attach it by holding. The present invention has been made in view of this point, and an object of the present invention is to provide a rotation sensor capable of fixing the cord clamper to the rotation sensor without rattling.

[0004]

[Means for Solving the Problems]

 For this reason, in the present invention, the rotation sensor is provided with a cord clamper that detects the number of rotations of the rotating body by installing a pole piece on the rotating body and fixes the code that outputs the detection signal in a predetermined derivation direction. In the above, the cord clamper has a clamp portion for holding the cord, and a crown portion that is crowned to an end surface of the body in the rotation sensor, and the crown portion has both side surfaces of the body. A plurality of engaging portions to be crimped are formed on the engaging surfaces respectively formed on the.

[0005]

【Example】

 Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a side view of the wheel sensor, FIG. 2 is a partial cross-sectional view as seen from the direction B of FIG. 1, FIG. 3 is an exploded perspective view of the wheel sensor as viewed from the back side, and FIG. 4 is a vertical sectional view of the wheel sensor. is there.

As shown in FIG. 4, the wheel sensor A includes a bobbin unit B including a bobbin 1, a pole piece 3 and the like, a stay 13 for attaching the bobbin unit B to a vehicle body, the stay 13 and the aforesaid stay 13. The bobbin unit B is integrally fixed to the body 15. A cylindrical bobbin 1 is provided with a cylindrical hole 2 along its axis, and a pole piece 3 is press-fitted and fixed in the cylindrical hole 2. The bobbin 1 is provided with a terminal mounting portion 4 on its end surface, and a pair of male terminals 5 and 6 (6 is not shown) are press-fitted and fixed to the terminal mounting portion 4. Both ends of a coil 7 wound around the outer circumference of the bobbin 1 are entwined with the terminals 5 and 6, respectively. The terminals 5 and 6 are provided with connecting portions 5a and 6a at their tips. On the end surface of the bobbin 1, a disk-shaped magnet 9 and a yoke 10 are sequentially arranged in contact with the pole piece 3. Then, after the magnet 9 and the yoke 10 are arranged on the end surface of the bobbin 1, the connecting portions 5a and 6a of the terminals 5 and 6 are bent to form the bobbin unit B. The bobbin unit B is attached to the stay 13 by engaging the engagement portion provided on the bobbin 1 with the stay 13. A body 15 is formed by resin molding around the sensor unit C including the bobbin unit B and the stay 13, whereby the bobbin unit B is fixed to the stay 13.

As shown in FIGS. 3 and 4, a cavity 17 is formed in a portion of the body 15 located on the back surface side of the stay 13 so as to communicate with the outside. The terminals 5 and 6 are provided with connection portions 5a and 6a. Then, by inserting the joint 18 into the cavity 17, the female terminals 19 and 23 fixed to the inside of the joint 18 by the claw portions 18 a and connected to the output cord 20 are connected to the terminals 5 and 6. Connected to. The opening of the cavity 17 is waterproofed by a rubber boot 21, and the rubber boot 21 is securely fixed to the body 15 by a rubber holder 25 (see FIG. 1).

As shown in FIGS. 1, 3, and 4, the output cord 20 is fixed in a predetermined lead-out direction by a cord clamper 22 fixed to the body 15. The cord clamper 22 is formed of a metal plate material, and has a bag-shaped crown portion 36 that is crowned to the end surface of the body 15 and the clamp portion 35 that holds the output cord 20 via the rubber guide member. And have. Since the crowned portion 36 is formed in the shape of a bag in this manner, when the crowned portion 36 is crowned to the end surface of the body 15, the cord clamper 22 is moved in the left-right direction, the frontward direction, and the downward direction with respect to the body 15. Can be fixed. Further, a pair of engaging legs 37, 38 are formed on the crown attachment portion 36 of the cord clamper 22 so as to hang down from both sides thereof. On the other hand, the body 15 is formed with engagement walls 45, 46 (46 is not shown) facing forward (to the right in FIG. 1) on both sides of the body 15. By engaging the end edges with the engaging walls 45, 46, the cord clamper 22 can be fixed also in the rearward direction of the body 15 (leftward in FIG. 1).

The crown attachment portion 36 of the cord clamper 22 is provided with two crimp portions 41, 42, 43, 44 (43 is not shown) on both sides thereof. On the other hand, the body 15 is formed with concave grooves 39, 40 on both sides thereof, and the upper walls 39a, 40a and the lower walls 39b, 40b in the concave grooves 39, 40 are respectively formed on the inclined surfaces. .. Then, the crown clamp portion 36 of the cord clamper 22 is crowned to the end surface of the body 15, and the crimp portions 41, 42, 43, 44 are crimped into the recessed grooves 39, 40, whereby the cord clamper 22 is secured to the body 15. In contrast, it can be fixed without rattling. In this case, the upper edges of the caulked portions 41, 42, 43, 44 engage with the upper walls 39a, 40a in the recessed grooves 39, 40 that are formed to be inclined, and the caulked portions 41, 42, 43, 44 The lower edges likewise engage the lower walls 39b, 40b in the recessed grooves 39, 40, which are also formed with inclination. As a result, even if the caulking portions 41, 42, 43, 44 of the cord clamper 22 or the concave grooves 39, 40 of the body 15 have dimensional variations, the variations are absorbed by the wedge action during crimping. The clamper 22 can be fixed to the body 15 without rattling.

As shown in FIG. 4, the tip 3a of the pole piece 3 is exposed from the body 15, and the wheel sensor A has its exposed portion opposed to a gear wheel provided coaxially with a vehicle wheel. It is installed near the wheels in the installed state. As described above, since the wheel sensor A is mounted near the wheel, it is susceptible to vibration and impact, but as described above, the code clamper 22 is fixed to the body 15 without rattling, so that the wheel clamper 22 is fixed to the wheel. The sensor A can be mounted with vibration resistance and shock resistance, and as a result, the output cord 20 can be securely held. The change in the external magnetic field lines captured by the tip 3a of the pole piece 3 is converted into an electrical signal by the coil 7 wound around the bobbin 1 and is not shown in the figure via the output code 20. It is sent to the measuring device.

In the above embodiment, the upper walls 39a, 40a and the lower walls 39b, 40b in the recessed grooves 39, 40 provided on both sides of the body 15 are both formed on the inclined surface, and the caulking portion 41, The upper edges of 42, 43, and 44 are the upper walls 39a and 40a in the concave grooves 39 and 40, and the lower edges of the caulked portions 41, 42, 43, and 44 are the lower walls 39b and 40b in the concave grooves 39 and 40. Although the upper walls 39a, 40a in the recessed grooves 39, 40 are formed into inclined surfaces, the upper edges of the caulked portions 41, 42, 43, 44 are formed on the upper walls 39a, The engagement with 40a is sufficient to fix the cord clamper 22 to the body 15 without rattling.

[0012]

As described above, in the present invention, the pole piece is provided opposite to the rotating body to detect the rotation speed of the rotating body, and the code for outputting the detection signal is fixed in a predetermined derivation direction. In a rotation sensor including a code clamper, the code clamper includes a clamp portion that holds the above-mentioned code and a crown attachment portion that is attached to an end surface of the body of the rotation sensor. Since the plurality of engaging portions to be crimped are formed on the engaging surfaces formed on both side surfaces of the body, the cord clamper can be fixed to the body of the rotation sensor without rattling. As a result, the cord clamper 22 can be attached to the wheel sensor A with vibration resistance and shock resistance, so that the output cord 20 can be held securely. There is an excellent effect. Further, since the engaging surface is formed as an inclined surface and the engaging portion is crimped to the inclined surface with a wedge effect, the engaging portion of the cord clamper or the engaging surface of the body is formed. Even if there are variations in dimensions, the variations are absorbed by the wedge action during crimping, so the cord clamper can be firmly fixed to the body without rattling.

[Brief description of drawings]

1 is a side view of a wheel sensor. FIG.

FIG. 2 is a partially broken cross-sectional view seen from the direction B in FIG.

FIG. 3 is an exploded perspective view of the wheel sensor as viewed from the back side.

FIG. 4 is a longitudinal sectional view of the wheel sensor.

[Explanation of symbols]

 A wheel sensor 3 pole piece 15 body 20 output code 22 code clamper 35 clamp part 36 crown part 37 engaging leg 38 engaging leg 39 concave groove 40 concave groove 4oa upper wall 4ob lower wall 41 caulking part 42 caulking part 45 caulking part 45 engagement Ply wall

Claims (2)

[Scope of utility model registration request] 1. A rotation sensor comprising a cord clamper for fixing a cord for outputting a detection signal in a predetermined lead-out direction, in which a pole piece is provided opposite to the rotor to detect the rotation speed of the rotor. The cord clamper has a clamp portion that holds the cord, and a crown attachment portion that is attached to an end surface of a body of the rotation sensor.
The rotation sensor is characterized in that a plurality of engaging portions which are crimped to the engaging surfaces respectively formed on both side surfaces of the body are formed in the crown attachment portion. 2. The rotation sensor according to claim 1, wherein the engaging surface is formed as an inclined surface, and the engaging portion is crimped to the inclined surface with a wedge effect.