JP2562892Y2 - Wheel speed detection device for traveling vehicles - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for detecting the number of revolutions of wheels of a traveling vehicle.

[0002]

2. Description of the Related Art As shown in FIG. 1, as a front wheel of a traveling vehicle, a wheel hub 3 is rotatably supported on an axle 1 via a bearing 2, and a tire 4 is mounted on the wheel hub 3 to form a wheel 5. It is known that a wheel 5 is rotatable about an axle 1. In such a front wheel, a brake mechanism 6 is mounted over the axle 1 and the wheel hub 3 so that the front wheel can be braked. In order to control the brake mechanism 6, the number of rotations of the wheel 5 is detected. I have. For example, FIG.
As shown in FIG. 3, a pulse wheel 7 is mounted on the outer peripheral surface of the wheel hub 3, a rotation speed detecting sensor 8 is mounted on the axle 1, and when the wheel 5 rotates with the rotation of the wheel 5, the rotation speed detecting sensor 8 And outputs a signal proportional to.

[0003]

In such a rotational speed detecting device, the opposing rotational speed detecting portions of the pulse wheel 7 and the rotational speed detecting sensor 8 are exposed to the outside. The formed concave portion and the tip of the rotation number detecting sensor 8, that is, the rotation number detecting portion may be worn or damaged by soil and the like, resulting in poor durability.

[0004] Therefore, an object of the present invention is to provide a wheel rotation speed detecting device for a traveling vehicle which can solve the above-mentioned problem.

[0005]

According to a first aspect of the present invention, a wheel hub 3 is rotatably supported on an axle 1 via a bearing 2, and a tire 4 is mounted on the wheel hub 3 to form a wheel 5. 3, a pulse wheel 7 is provided on the outer peripheral surface at one axial end, and a plate 1 for mounting a brake is provided on the axle 1.
0 is mounted facing the pulse wheel 7, a ring-shaped cover 11 is mounted on the plate 10 so as to face the outer peripheral surface of the pulse wheel 7, and a rotation speed detecting sensor 8 is mounted on the cover 11 on the outer peripheral surface of the pulse wheel 7. A seal 14 is mounted opposite the one side 12 to form a rotational speed detector. A seal 14 is provided between the inner peripheral surface of the cover 11 and the outer peripheral surface 13 of the pulse wheel 7 on the other side of the rotational speed detector. A wheel rotation number detection device for a traveling vehicle, wherein the device is mounted. Second
In the invention, a wheel hub 3 is rotatably supported on an axle via a bearing 2, and a tire 4 is mounted on an outer peripheral surface of the wheel hub 3.
Is attached to the wheel 5, and a seal receiver 21 and a flange 22 are provided on a retainer 20 of the bearing 2.
A rotation speed detecting sensor 8 and a pulse wheel 7 are provided opposite to each other on the wheel hub 3 to form a rotation speed detecting portion, and an inner peripheral surface of the flange 22 and an outer peripheral surface of the wheel hub 3 outside the rotational speed detecting portion. A wheel rotation number detecting device for a traveling vehicle, wherein a seal 27 is mounted between the two.

[0006]

According to the first invention, earth and sand and the like try to enter the rotation speed detecting portion only from between the inner peripheral surface of the cover 11 and the outer peripheral surface other side portion 13 of the pulse wheel 7, and a seal is provided between them. Since the rotation speed detector 14 is mounted, the rotation speed detector is not worn or damaged by the earth and sand without entering the rotation speed detector opposite to the pulse wheel 7 and the rotation speed sensor 8. Absent. Further, since only one seal 14 is required and the plate 10 for mounting the brake is used, the number of parts used for preventing earth and sand from entering the rotation speed detecting unit is small, and the assembly work can be performed at low cost. Becomes easier. According to the second invention, the seal 27 prevents soil and the like from entering the rotational speed detecting portion of the pulse wheel 7 and the rotational speed detecting sensor 8 which are opposed to each other. Is not worn or damaged.

[0007]

[Embodiment] As shown in FIG. 3, a ring-shaped cover 11 is mounted on a brake mounting plate 10 mounted on the axle 1, a rotation speed detecting sensor 8 is mounted on the cover 11, and an outer periphery of the pulse wheel 7 is mounted. A concave portion is formed in the one surface portion 12, the outer peripheral surface other side portion 13 has a planar shape, and the distal end portion 8a of the rotational speed detecting sensor 8 faces the outer peripheral surface one side portion 12 as a rotational speed detecting portion. A seal 14 is provided between the other side portion 13 of the outer peripheral surface and the inner peripheral surface of the cover 11 to isolate the rotation speed detecting portion from the outside so that soil and the like do not enter the rotation speed detecting portion. The seal 14 may be an oil seal or a floating seal. The pulse wheel 7 may be integral with the wheel hub 3. As shown in FIG. 4, a seal receiver 21 is provided on a retainer 20 for supporting an inner race 2a of a bearing 2 for supporting a wheel hub 3 on an axle 1.
And a flange 22 are integrally provided, and O-rings 23 are respectively mounted on the inner peripheral concave portion 3a of the wheel hub 3 and the inner peripheral concave portion 21a of the seal receiver 21 to form a pair of seal rings 24, 2.
4 are pressed against each other to form a floating seal 25, and a rotation speed detecting sensor 8 is attached to the flange 22, and the tip 8 a of the rotation is opposed to the tooth 26 formed on the outer peripheral surface of the wheel hub 3, that is, the pulse wheel 7. Number detector,
A seal 27 is mounted between the flange 22 and the outer peripheral surface of the wheel hub 3 to isolate the rotation speed detecting unit. As shown in FIG. 5, a pulse wheel 7 is provided on the outer peripheral surface of the wheel hub 3.
May be fitted and fixed by shrink fitting or the like.

[0008]

According to the first aspect of the present invention, a cover 1 is provided.
1 tries to enter the rotation speed detecting portion only from between the inner peripheral surface of the pulse wheel 1 and the outer peripheral surface 13 on the outer peripheral surface of the pulse wheel 7. The earth and sand and the like do not enter into the rotation number detecting section facing the number detection sensor 8, and the rotation number detecting section is not worn or damaged by the earth and sand. In addition, only one seal 14 is sufficient, and the plate 10
Is used, the number of components used for preventing earth and sand from entering the rotation speed detecting unit is small, the cost is low, and the assembling work is simplified. According to the invention of claim 2, since the seal 27 prevents the earth and the like from entering the rotational speed detecting portion of the pulse wheel 7 and the rotational speed detecting sensor 8 opposed to each other, the rotational speed is prevented by the soil and the like. The detector is not worn or damaged.

[Brief description of the drawings]

FIG. 1 is a sectional view of a wheel mounting portion.

FIG. 2 is a sectional view of a conventional example.

FIG. 3 is a sectional view showing the first embodiment of the present invention.

FIG. 4 is a sectional view showing a second embodiment of the present invention.

FIG. 5 is a sectional view showing a third embodiment of the present invention.

[Explanation of symbols]

1 wheel, 2 bearings, 3 wheel hubs, 4 tires,
5 wheel, 7 pulse wheel, 8 rotation speed detection sensor, 11 cover, 14 seal, 20 retainer, 2
1 seal receiver, 22 flanges, 27 seals.

Claims (2)

(57) [Scope of request for utility model registration] 1. A wheel hub 3 is rotatably supported on an axle 1 via a bearing 2, and a tire 4 is mounted on the wheel hub 3 to form a wheel 5. One end of the wheel hub 3 in the axial direction is provided.
A pulse wheel 7 is provided on the outer peripheral surface of the
The plate 10 for mounting the brakes faces the pulse wheel 7
And attach a ring-shaped cover 11 to the plate 10.
It is installed facing the outer peripheral surface of the pulse wheel 7, and this cover
-11, the rotation speed detecting sensor 8 is attached outside the pulse wheel 7.
Attached to the peripheral side one side portion 12 to form a rotation speed detecting portion,
Inner circumference of cover 11 on the other side than this rotation speed detector
Between the surface and the other side portion 13 of the outer peripheral surface of the pulse wheel 7.
Wheel speed detecting apparatus of the traveling vehicle, characterized in that wearing the Le 14. 2. A wheel hub 3 is rotatably supported on an axle via a bearing 2, and a tire 4 is mounted on an outer peripheral surface of the wheel hub 3 to form a wheel 5, and a retainer 20 of the bearing 2 is provided.
A rotation speed detecting sensor 8 and a pulse wheel 7 are provided on the flange 22 and the wheel hub 3 so as to face each other to form a rotation speed detecting portion. A wheel rotation speed detecting device for a traveling vehicle, wherein a seal 27 is mounted between an inner peripheral surface of a flange 22 and an outer peripheral surface of a wheel hub 3.