Wheel speed sensor for vehicle

Abstract

The present invention relates to a wheel speed sensor for a vehicle, the wheel speed sensor comprising: a main sensor unit; a mounting unit formed on the main sensor unit; and assembly units assembled in pairs to maintain a coupling state with the mounting unit, and a mounting angle of the assembly units may be changed using the mounting unit as a central axis.

Description

[Technical field]

[0001] The present invention relates to a wheel speed sensor for a vehicle, and more particularly to a wheel speed sensor for a vehicle, wherein a mounting angle can be changed according to various working environments, and shared use of components and assemblability with a chassis can be improved. [Background Technology]

[0002] Generally speaking, a device for slowing down or keeping a car stopped during driving is a service brake, and a friction brake is used as a service brake used in a car. The method is as follows: while braking is performed, kinetic energy during driving is converted into heat energy by means of a mechanical friction device and this friction heat is discharged to the atmosphere.

[0003] Among the main brakes for vehicles, there is a device for improving braking performance by ensuring maneuverability by controlling the brake hydraulic pressure and also by shortening the stopping distance during sudden braking or when braking on a slippery road surface, and such a device is generally called ABS (Anti-lock Braking System). Such ABS is mainly composed of a hydraulic regulator (hydraulic unit) that controls the hydraulic pressure supplied to the wheel cylinder according to a signal from an ECU for control, and a device that detects the rotation state of the wheel.

[0004] Here, a device that detects the rotation state of a wheel is generally referred to as a wheel speed sensor (WSS), and the wheel speed sensor is a sensor that detects the speed of each wheel using a Hall IC chip or an xMR IC chip, and is a device that serves not only as a main factor in ABS / ESP (Electronic Stability Program; Vehicle Orientation Control Device) but also provides data that is important for controlling other vehicle components.

[0005] A conventional wheel speed sensor includes a sensor head and a cable, wherein the sensor head is mounted on a wheel knuckle, and the cable connected to the sensor head is mounted on a chassis. However, there is a problem that when the assembly shape of the sensor head assembled with the wheel knuckle needs to be changed according to the vehicle layout environment, the shape of the wheel speed sensor itself must be redesigned. Therefore, improvement is required.

[0006] Background art of the present invention is described in Korean Patent Publication No. 2004-0009439 (published on January 31, 2004, invention title: METHOD OF DETECTING VEHICLE SPEED USING SPEED SENSOR). [Summary of the invention]

[0007] [Problems to be solved]

[0008] The present invention has been devised to improve the above problems, and an object of the present invention is to provide a wheel speed sensor for a vehicle, in which the mounting angle can be changed according to various working environments, and the shared use of components and assemblability with a chassis can be improved.

[0009] [Methods of solving the problem]

[0010] A wheel speed sensor for a vehicle according to the present invention includes: a main sensor unit; a mounting unit formed on the main sensor unit; and an assembling unit, which is assembled in pairs to maintain a connection state with the mounting unit and whose mounting angle can be changed using the mounting unit as a central axis.

[0011] The mounting unit may have a polygonal shape, and the assembling unit may be in close contact with the mounting unit.

[0012] The assembly unit may include: a first assembly part, which is in close contact with the mounting unit; a second assembly part, which is in close contact with the mounting unit and can be attached to and detached from the first assembly part; and a bushing part, which is formed on at least one of the first assembly part and the second assembly part and is connected to the target object.

[0013] The first assembly part and the second assembly part may be molded of a resin material, and the bushing part may be made of a metal material and may be insert-molded in the first assembly part or the second assembly part.

[0014] The first assembling part may include: a first body into which the mounting unit is partially inserted; and a first hook portion formed on the first body and protruding to hook and fix the second assembling part.

[0015] The first assembling part may further include a first protrusion formed on the first body and inserted into the second assembling part to calibrate an assembling position.

[0016] The second assembling part may include: a second body which contacts the surface of the first body and into which the mounting unit is partially inserted; and a second hooking portion which is formed on the second body and is recessed to hook and fix the first hook portion.

[0017] [Effects of the invention]

[0018] The wheel speed sensor for a vehicle according to the present invention can be used in various working environments because the assembling unit is coupled to the mounting unit formed on the main sensor unit and the mounting angle of the assembling unit can be changed using the mounting unit as a central axis. [Drawings]

[0019] Figure 1 is a diagram schematically showing an assembled state of a wheel speed sensor for a vehicle according to an embodiment of the present invention.

[0020] Figure 2 is a diagram schematically showing a separated state of a wheel speed sensor for a vehicle according to an embodiment of the present invention.

[0021] Figure 3 is a diagram schematically showing a state in which the mounting angle of the wheel speed sensor for a vehicle according to the embodiment of the present invention is changed.

[0022] Figure 4 is a diagram schematically showing a first assembly part according to an embodiment of the present invention.

[0023] Figure 5 is a diagram schematically showing a second assembly part according to an embodiment of the present invention. [Specific implementation method]

[0024] Hereinafter, embodiments of a wheel speed sensor for a vehicle according to the present invention will be described with reference to the accompanying drawings. In the process, aspects such as the thickness of a line or the size of a component shown in the drawings may be exaggerated for the sake of clarity and convenience of description. In addition, the following terms are defined with respect to the functions of the present invention, and these terms may vary according to the intention or practice of a user or operator. Therefore, the definitions of these terms should be based on the contents throughout the entire specification.

[0025] Figure 1 is a diagram schematically showing an assembled state of a wheel speed sensor for a vehicle according to an embodiment of the present invention. Figure 2 is a diagram schematically showing a separated state of a wheel speed sensor for a vehicle according to an embodiment of the present invention. Figure 3 2 is a diagram schematically showing a state in which the installation angle of the wheel speed sensor for a vehicle according to an embodiment of the present invention is changed. Figures 1 to 3 A wheel speed sensor (1) for a vehicle according to an embodiment of the present invention may include a main sensor unit (10), a mounting unit (20) and an assembling unit (30).

[0026] The main sensor unit (10) may be equipped with a chip and may sense an object to be measured. As an example, the main sensor unit (10) may sense a magnetic field provided by a wheel as an object to be measured and may transmit a sensing signal to the control unit.

[0027] The mounting unit (20) may be formed on the main sensor unit (10). The mounting unit (20) may be formed on an end portion of the main sensor unit (10). The mounting unit (20) may be injection molded as a single body together with the main sensor unit (10) made of a resin material. In other ways, the mounting unit (20) made of a material different from the main sensor unit (10) may be insert molded in the main sensor unit (10).

[0028] The mounting unit (20) may have a polygonal shape. The mounting unit (20) may be formed to have a quadrilateral cross section, and the assembly unit (30) may be in close contact with the mounting unit (20). When the assembly unit (30) is in close contact with the mounting unit (20), the assembly unit (30) may be prevented from rotating about the axis of the mounting unit (20) due to the angular shape of the mounting unit (20).

[0029] The mounting unit (20) may include: a first mounting part (21) formed on an end portion of the main sensor unit (10); and a second mounting part (22) formed between the first mounting part (21) and the main sensor unit (10). The second mounting part (22) may be formed to have a smaller cross-sectional area than the first mounting part (21). Due to this, the second mounting part (22) may have a more concave shape than the first mounting part (21).

[0030] A pair of assembly units (30) can be assembled together and can maintain a connection state with the mounting unit (20). The mounting angle of the assembly unit (30) can be changed using the mounting unit (20) as a central axis. That is, when the cross-sectional shape of the mounting unit (20) is a quadrilateral, the mounting angle of the assembly unit (30) can be changed at intervals of 90 degrees.

[0031] *twenty four Figure 4 is a diagram schematically showing a first assembly part according to an embodiment of the present invention, Figure 5 Schematically shows a second assembly part according to an embodiment of the present invention. Figure 4 and Figure 5According to one embodiment of the present invention, an assembly unit (30) may include a first assembly part (50), a second assembly part (60) and a bushing part (70). The first assembly part (50) and the second assembly part (60) may be arranged to face each other, and the mounting unit (20) may be arranged between the first assembly part (50) and the second assembly part (60).

[0032] The first assembly part (50) can be in close contact with the mounting unit (20). The first assembly part (50) is formed so that a part of the mounting unit (20) can be inserted, and when the inside of the first assembly part (50) is in close contact with the mounting unit (20) having a polygonal shape, the rotation of the first assembly part (50) itself due to external force can be restricted. As an example, half of the mounting unit (20) having a quadrilateral cross section can be inserted inside the first assembly part (50).

[0033] The second assembly part (60) is in close contact with the mounting unit (20) and can be attached to and detached from the first assembly part (50). The second assembly part (60) is formed so that the rest of the mounting unit (20) can be inserted, and when the inside of the second assembly part (60) is in close contact with the mounting unit (20) having a polygonal shape, the rotation of the second assembly part (60) itself due to external force can be restricted. As an example, half of the mounting unit (20) having a quadrilateral cross section can be inserted inside the second assembly part (60).

[0034] A bushing part (70) may be formed on at least one of the first assembly part (50) and the second assembly part (60) and may be coupled to a target object. The bushing part (70) may be manufactured to include a metal material and may be insert-molded in any one of the first assembly part (50) and the second assembly part (60) manufactured from a resin material to guide a chassis component and be bolt-coupled with the chassis component. The bushing part (70) may be formed in an annular shape and may have a groove or a protrusion formed thereon so as to improve a coupling force by means of an inflow of the resin material during insert molding.

[0035] The first assembly part (50) according to an embodiment of the present invention may include a first body (51) and a first hook portion (52).

[0036] The mounting unit (20) may be partially inserted inside the first body (51). The first body (51) may have a semicircular cross section. The first body (51) may include: a first body curved portion (511) having a curved shape in a circumferential direction; and a first body flat portion (512) having a flat shape in a diameter direction. A first body recessed portion (513) into which the mounting unit (20) is partially inserted may be formed in a central portion of the first body flat portion (512). The first body recessed portion (513) may be in direct close contact with the mounting unit (20).

[0037] The first hook portion (52) may be formed on the first body (51) and may protrude so as to hook and fix the second assembly part (60). The first hook portion (52) may be respectively formed on each of the first body flat portions (512) provided on both sides of the first body recessed portion (513), may have a hook shape, and may protrude toward the second assembly part (60).

[0038] The first assembly part (50) may further include a first protrusion (53). The first protrusion (53) may be formed on the first body (51) and may be inserted into the second assembly part (60) to calibrate the assembly position. The first protrusion (53) may have a smaller diameter than the first body (51) and may have a semicircular cross-section. The first protrusion (53) may include: a first protrusion curved portion (531) having a curved shape in a circumferential direction; and a first protrusion flat portion (532) having a flat shape in a diameter direction. The first protrusion recessed portion (533) may be formed in a central portion of the first protrusion flat portion (532) so as to partially surround the cable (90). The first protrusion recessed portion (533) may be in communication with the first body recessed portion (513). The first protrusion insertion portion (534) may be formed on each of the first protrusion flat portions (532) provided on both sides of the first protrusion recessed portion (533). The first protrusion insertion portion (534) may protrude toward the second assembling part (60). The first protrusion insertion portion (534) may be inserted into the second assembling part (60) before the first hook (52) to calibrate the assembling position of the first hook (52).

[0039] The second assembly part (60) according to the embodiment of the present invention may include a second body (61) and a second hook portion (62).

[0040] The second body (61) may be in surface contact with the first body (51) and a portion of the mounting unit (20) may be inserted. The second body (61) may have a semi-elliptical cross-section. The second body (61) may include: a second body curved portion (611) having an elliptical curved shape; and a second body flat portion (612) having a flat shape. A second body recessed portion (613) into which the mounting unit (20) is partially inserted may be formed in a central portion of the second body flat portion (612). The second body recessed portion (613) may be in direct close contact with the mounting unit (20).

[0041] The second hook portion (62) may be formed on the second body (61) and may be recessed to hook and fix the first hook portion (52). As an example, the second hook portion (62) may include: a second hook portion fixing portion (621) formed to be recessed in the second body curved portion (611); and a second hook portion insertion portion (622) formed to be recessed in the second body flat portion (612). The second hook portion fixing portion (621) and the second hook portion insertion portion (622) may be connected. The first hook portion (52) may be inserted into the second hook portion insertion portion (622) and may be hooked and fixed by the second hook portion fixing portion (621).

[0042] The following will describe an assembling process of the wheel speed sensor for a vehicle having the above-mentioned structure according to an embodiment of the present invention.

[0043] A main sensor unit (10) is manufactured and a mounting unit (20) is formed on the main sensor unit (10). In addition, an assembly unit (30) including a first assembly part (50) and a second assembly part (60) is manufactured. A bushing part (70) is insert-molded in the second assembly part (60).

[0044] In the above state, the first assembly part (50) and the second assembly part (60) are arranged on both sides of the mounting unit (20) facing each other, and the first assembly part (50) is hooked to the second assembly part (60) and assembled with the second assembly part.

[0045] When the first assembly part (50) and the second assembly part (60) are hooked and assembled, the mounting unit (20) is disposed between the first assembly part (50) and the second assembly part (60). In this case, the mounting unit (20) having an angular shape is in close contact with the inner sides of the first assembly part (50) and the second assembly part (60), so that the rotation of the assembly unit (30) is restricted.

[0046] When the first assembly part (50) and the second assembly part (60) are assembled and coupled to the mounting unit (20), the bushing part (70) is fixed to the chassis. At the same time, the installation angles of the first assembly part (50) and the second assembly part (60) can be changed according to the installation environment.

[0047] A wheel speed sensor (1) for a vehicle according to an embodiment of the present invention can be used in various working environments because an assembly unit (30) is coupled to a mounting unit (20) formed on a main sensor unit (10), and a mounting angle can be changed using the mounting unit (20) as a central axis.

[0048] Although the present invention has been described with reference to the embodiments shown in the accompanying drawings, this is merely illustrative. It will be appreciated by those skilled in the art that various modifications and other equivalent embodiments may be implemented based on this. Therefore, the true technical protection scope of the present invention should be based on the following claims.

[0049] [Description of Reference Signs]

[0050] 10: Main sensor unit 20: Mounting unit

[0051] 30: Assembly unit 50: First assembly part

[0052] 51: first body 52: first hook portion

[0053] 53: first protrusion 60: second assembly part

[0054] 61: Second body 62: Second hook portion

[0055] 70: Bushing parts

Claims

1. A wheel speed sensor for a vehicle, characterized in that: The wheel speed sensor comprises: Main sensor unit; a mounting unit formed on the main sensor unit; and An assembling unit is assembled in pairs to maintain a coupled state with the mounting unit, and a mounting angle of the assembling unit can be changed using the mounting unit as a central axis.

2. The wheel speed sensor for a vehicle according to claim 1, characterized in that: The mounting unit has a polygonal shape, and The assembling unit is in close contact with the mounting unit.

3. The wheel speed sensor for a vehicle as claimed in claim 1, characterized in that The assembly unit includes: a first assembly part, the first assembly part being in close contact with the mounting unit; a second assembly part which is in close contact with the mounting unit and is attachable to and detachable from the first assembly part; and A bushing part is formed on at least one of the first assembly part and the second assembly part and is coupled to a target object.

4. The wheel speed sensor for a vehicle as claimed in claim 3, characterized in that: The first assembly part and the second assembly part are molded from a resin material, and The bushing part is made of a metal material and is insert-molded in the first assembly part or the second assembly part.

5. The wheel speed sensor for a vehicle as claimed in claim 3, characterized in that: The first assembly part includes: a first body into which the mounting unit is partially inserted; and A first hook portion is formed on the first body and protrudes to hook and fix the second assembling part.

6. The wheel speed sensor for a vehicle as claimed in claim 5, characterized in that: The first assembly part includes: A first protrusion is formed on the first body and is inserted into the second assembling part to calibrate an assembling position.

7. The wheel speed sensor for a vehicle as claimed in claim 5, characterized in that: The second assembly part includes: a second body that is in surface contact with the first body and into which the mounting unit is partially inserted; and A second hook portion is formed on the second body and is recessed to hook and fix the first hook portion.

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