Wheel speed sensor for vehicles

Abstract

The present invention relates to a wheel speed sensor for a vehicle, comprising: a main sensor unit; a mounting unit formed on the main sensor unit; and a mounting unit which is mounted as a pair to maintain a coupled state with the mounting unit, and whose mounting angle is variable using the mounting unit as a central axis. Representative drawing

Description

Technical area

[0001] The present invention relates to a wheel speed sensor for a vehicle, particularly to a wheel speed sensor for a vehicle in which the mounting angle can be changed according to various working environments and the sharing of components and the mountability with the chassis can be improved. Background of the invention

[0002] Generally, the device for decelerating a car while moving or maintaining a stopped state is the main brake, and a friction brake is used as the main brake in cars. In this method, the kinetic energy during movement is converted into heat energy by a mechanical friction device, and this frictional heat is dissipated into the atmosphere during braking.

[0003] A vehicle's main brake contains a device that ensures maneuverability by controlling hydraulic brake pressure and also improves braking performance by shortening the stopping distance during sudden braking or when braking on slippery roads. This device is commonly referred to as ABS (anti-lock braking system). Such an ABS essentially comprises: a hydraulic modulator (hydraulic unit) that controls the hydraulic pressure supplied to a wheel cylinder according to a control signal from an ECU; and a device that detects the rotational state of a wheel.

[0004] The device that detects the rotational state of a wheel is commonly called a wheel speed sensor, and the wheel speed sensor is a sensor that detects the rotational speed of each wheel using a Hall IC chip or an xMR IC chip. It is not only an important factor in an ABS / ESP (electronic stability program; vehicle orientation control device), but also provides data important for controlling other vehicle components.

[0005] A conventional wheel speed sensor comprises a sensor head and a cable, with the sensor head mounted on the steering knuckle and the cable connected to the sensor head mounted on the chassis. However, one problem is that the shape of the wheel speed sensor itself must be redesigned if a change in the shape of the sensor head, which is assembled with the steering knuckle, is required according to the vehicle design environment. Therefore, there is a need for improvement.

[0006] The background of the present invention is described in Korean Patent Publication, Patent Gazette No. 2004-0009439 (published on January 31, 2004, title of the invention: METHOD OF DETECTING VEHICLE SPEED USING SPEED SENSOR). Disclosure of the invention Problem to be solved

[0007] The present invention has been devised to solve the problems described above, 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 commonality of components and the mountability with the chassis can be improved. Means of solving the problem

[0008] A wheel speed sensor for a vehicle according to the present invention comprises: a main sensor unit; a fixing unit formed on the main sensor unit; and a mounting unit that is mounted as a pair to maintain a coupled state with the fixing unit and whose fixing angle is changeable using the fixing unit as a center axis.

[0009] The fixing unit may have a polygonal shape, and the mounting unit may be in close contact with the fixing unit.

[0010] The mounting unit may include: a first mounting part in close contact with the fixing unit; a second mounting part in close contact with the fixing unit and attachable to and detachable from the first mounting part; and a socket part formed on at least one of the first mounting part and the second mounting part and coupled to the target object.

[0011] The first mounting part and the second mounting part may be molded from a resin material, and the socket part may be made of a metal material and overmolded in the first mounting part or the second mounting part.

[0012] The first mounting part may include: a first body into which the fastening unit is partially inserted; and a first hook formed on the first body and projecting to engage and fix the second mounting part.

[0013] The first mounting part may further comprise a first protrusion formed on the first body and inserted into the second mounting part to calibrate the mounting position.

[0014] The second mounting part may comprise: a second body in surface contact with the first body and into which the fastening unit is partially inserted; and a second catch formed and recessed on the second body to engage and fix the first hook. Effects of the invention

[0015] The wheel speed sensor for a vehicle according to the present invention can be used in various working environments because the mounting unit is coupled to the fixing unit formed on the main sensor unit and the fixing angle thereof is changeable using the fixing unit as a center axis. Brief description of the drawings Fig. 1 is a drawing schematically showing the mounted state of the wheel speed sensor for a vehicle according to an embodiment of the present invention. Fig. 2 is a drawing schematically showing the separated state of the wheel speed sensor for a vehicle according to an embodiment of the present invention. Fig. 3 is a drawing schematically showing the change in the states of the mounting angle of the wheel speed sensor for a vehicle according to an embodiment of the present invention. Fig. 4 is a drawing schematically showing a first mounting part according to an embodiment of the present invention. Fig. 5 is a drawing schematically showing a second mounting part according to an embodiment of the present invention. Details on the implementation of the invention

[0016] An embodiment of the wheel speed sensor for a vehicle according to the present invention will be described below with reference to the accompanying drawings. Aspects such as the thickness of lines or the size of components shown in the drawings may be exaggerated for clarity of description and simplicity. Furthermore, the following terms are defined with respect to the functions of the present invention in mind, which may vary depending on the intention or practice of the user or operator. Therefore, definitions of these terms should be based on the contents of the entire specification.

[0017] Fig. 1 is a drawing schematically showing the mounted state of the wheel speed sensor for a vehicle according to an embodiment of the present invention. Fig. 2 is a drawing schematically showing the separated state of the wheel speed sensor for a vehicle according to an embodiment of the present invention. Fig. 3 is a drawing schematically showing the change in the states of the mounting angle of the wheel speed sensor for a vehicle according to an embodiment of the present invention. Fig. 1 to 3, a wheel speed sensor (1) for a vehicle according to an embodiment of the present invention may comprise a main sensor unit (10), a fixing unit (20) and a mounting unit (30).

[0018] The main sensor unit (10) can be equipped with a chip and detect the object to be measured. For example, the main sensor unit (10) can detect a magnetic field generated by the wheel, i.e., the object to be measured, and transmit a detection signal to a control unit.

[0019] The fixing unit (20) may be formed on the main sensor unit (10). The fixing unit (20) may be formed on an end portion of the main sensor unit (10). The fixing unit (20) may be injection-molded with the main sensor unit (10) as a single body made of a resin material. Otherwise, the fixing unit (20), which is made of a different material than the main sensor unit (10), may be molded into the main sensor unit (10).

[0020] The fastening unit (20) may have a polygonal shape. The fastening unit (20) may be configured to have a quadrangular cross-section, and the mounting unit (30) may be in close contact with the fastening unit (20). When the mounting unit (30) is in close contact with the fastening unit (20), the angular shape of the fastening unit (20) may prevent the mounting unit (30) from rotating about the axis of the fastening unit (20).

[0021] The fixing unit (20) may include: a first fixing part (21) formed at an end portion of the main sensor unit (10); and a second fixing part (22) formed between the first fixing part (21) and the main sensor unit (10). The second fixing part (22) may be formed with a smaller cross-sectional area than the first fixing part (21). For this reason, the second fixing part (22) may have a more recessed shape than the first fixing part (21).

[0022] A pair of mounting units (30) can be assembled and maintained in a coupled state with the fixing unit (20). The fixing angle of the mounting unit (30) can be changed using the fixing unit (20) as the central axis. That is, if the cross-sectional shape of the fixing unit (20) is a quadrilateral, the fixing angle of the mounting unit (30) can be changed in 90-degree increments.

[0023] *24 Fig. 4 is a drawing schematically showing a first mounting part according to an embodiment of the present invention, and Fig. 5 is a drawing schematically showing a second mounting part according to an embodiment of the present invention. Fig. 4 and Fig.5, the mounting unit (30) according to one embodiment of the present invention may comprise a first mounting part (50), a second mounting part (60), and a socket part (70). The first mounting part (50) and the second mounting part (60) may be arranged to face each other, and the fastening unit (20) may be arranged between the first mounting part (50) and the second mounting part (60).

[0024] The first mounting part (50) can be in close contact with the fastening unit (20). The first mounting part (50) is configured to allow insertion of a part of the fastening unit (20). When the inner side of the first mounting part (50) is in close contact with the fastening unit (20), which has a polygonal shape, the rotation of the first mounting part (50) itself due to external forces can be limited. For example, half of the fastening unit (20), which has a quadrangular cross-section, can be inserted into the first mounting part (50).

[0025] The second mounting part (60) is in close contact with the fastening unit (20) and can be fastened to and detachable from the first mounting part (50). The second mounting part (60) is designed to allow the remainder of the fastening unit (20) to be inserted therein. When the inner side of the second mounting part (60) is in close contact with the fastening unit (20), which has a polygonal shape, the rotation of the second mounting part (60) itself due to external forces can be limited. For example, half of the fastening unit (20), which has a quadrangular cross-section, can be inserted into the second mounting part (60).

[0026] The bushing part (70) can be formed on the first mounting part (50) and / or the second mounting part (60) and coupled to the target object. The bushing part (70) can be made of a metal material and can be molded into the first mounting part (50) or the second mounting part (60), which are made of a resin material, to guide and be bolted to a chassis component. The bushing part (70) can be annular and have a groove or a projection to improve the coupling force by the inflow of resin material during overmolding.

[0027] According to an embodiment of the present invention, the first mounting part (50) may comprise a first body (51) and a first hook (52).

[0028] The fastening unit (20) can be partially inserted into the interior of the first body (51). The first body (51) can have a semicircular cross-section. The first body (51) can include: a curved portion (511) of the first body having a curved shape in the circumferential direction; and a flat portion (512) of the first body having a flat shape in the diametrical direction. In the central part of the flat portion (512) of the first body, a depressed portion (513) of the first body can be formed, into which the fastening unit (20) is partially inserted. The depressed portion (513) of the first body can be in direct, close contact with the fastening unit (20).

[0029] The first hook (52) may be formed on the first body (51) and protrude to engage and fix the second mounting part (60). The first hook (52) may be formed on each of the flat portions (512) of the first body located on both sides of the recessed portion (513) of the first body, may have a hook shape, and may protrude toward the second mounting part (60).

[0030] The first mounting part (50) may further comprise a first protrusion (53). The first protrusion (53) may be formed on the first body (51) and may be inserted into the second mounting part (60) to calibrate the mounting position. The first protrusion (53) may have a smaller diameter than the first body (51) and a semicircular cross-section. The first protrusion (53) may comprise: a curved portion (531) of the first protrusion having a curved shape in the circumferential direction; and a flat portion (532) of the first protrusion having a flat shape in the diametrical direction. A depressed portion (533) of the first protrusion may be formed in the central part of the flat portion (532) of the first protrusion to partially enclose a cable (90). The depressed portion (533) of the first protrusion may communicate with the depressed portion (513) of the first body.A first protrusion insertion portion (534) may be formed on each of the first protrusion flat portions (532) located on both sides of the first protrusion recessed portion (533). The first protrusion insertion portion (534) may protrude toward the second mounting part (60). The first protrusion insertion portion (534) may be inserted into the second mounting part (60) in front of the first hook (52) to calibrate the mounting position of the first hook (52).

[0031] The second mounting part (60) may, according to an embodiment of the present invention, comprise a second body (61) and a second trap (62).

[0032] The second body (61) may be in surface contact with the first body (51), and a portion of the fastening unit (20) may be inserted. The second body (61) may have a semi-elliptical cross-section. The second body (61) may include: a curved portion (611) of the second body having a curved shape in an ellipse; and a flat portion (612) of the second body having a flat shape. In the central part of the flat portion (612) of the second body, a depressed portion (613) of the second body may be formed, into which the fastening unit (20) is partially inserted. The depressed portion (613) of the second body may be in direct, close contact with the fastening unit (20).

[0033] The second catch (62) may be formed on the second body (61) and may be recessed to engage and fix the first hook (52). The second catch (62) may include, for example, a second catch fixing portion (621) recessed in the curved portion (611) of the second body; and a second catch insertion portion (622) recessed in the flat portion (612) of the second body. The second catch fixing portion (621) and the second catch insertion portion (622) may communicate with each other. The first hook (52) may be inserted into the second catch insertion portion (622) and engage and fix the second catch fixing portion (621).

[0034] The following describes the assembly process for the wheel speed sensor for a vehicle according to an embodiment of the present invention having the above-described structure.

[0035] The main sensor unit (10) is manufactured, and the mounting unit (20) is formed on the main sensor unit (10). Furthermore, the mounting unit (30), which includes the first mounting part (50) and the second mounting part (60), is manufactured. The bushing part (70) is cast into the second mounting part (60).

[0036] In the above-described state, the first mounting part (50) and the second mounting part (60) are arranged facing each other on both sides of the fastening unit (20), and the first mounting part (50) is hooked and assembled with the second mounting part (60).

[0037] When the first mounting part (50) and the second mounting part (60) are hooked and assembled, the fastening unit (20) is arranged between the first mounting part (50) and the second mounting part (60). In this case, the fastening unit (20), which has a square shape, is in close contact with the inner surfaces of the first mounting part (50) and the second mounting part (60), so that the rotation of the mounting unit (30) is limited.

[0038] When the first mounting part (50) and the second mounting part (60) are assembled and coupled to the fastening unit (20), the socket part (70) is fixed to the chassis. The installation angle of the first mounting part (50) and the second mounting part (60) can be changed depending on the installation environment.

[0039] The wheel speed sensor (1) for a vehicle according to an embodiment of the present invention can be used in various working environments because the mounting unit (30) is coupled to the fixing unit (20) formed on the main sensor unit (10), and the fixing angle can be changed using the fixing unit (20) as the central axis.

[0040] Although the present invention has been described with reference to the embodiments illustrated in the drawings, this is merely illustrative. Those of ordinary skill in the art to which the present technology belongs will understand that it is possible to implement various modifications and other equivalent embodiments based thereon. The true scope of the technical protection of the present invention should therefore be determined by the following claims. Description of reference symbols 10 Main sensor unit 20 fastening unit 30 assembly unit 50 First assembly part 51 First Body 52 First hook 53 First lead 60 Second assembly part 61 Second Body 62 Second Trap 70 socket part QUOTES CONTAINED IN THE DESCRIPTION

[0000] This list of documents submitted by the applicant was generated automatically and is included solely for the convenience of the reader. This list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions. Cited patent literature

[0000] KR 2004-0009439

[0006]

Claims

[1] Wheel speed sensor for a vehicle, characterized by that it includes: a main sensor unit; a fixing unit formed on the main sensor unit; and a mounting unit that is mounted as a pair to maintain a coupled state with the fixing unit, and whose fixing angle is changeable using the fixing unit as a central axis. [2] Wheel speed sensor for a vehicle according to claim 1, characterized by that the fixing unit has a polygonal shape and the mounting unit is in close contact with the fixing unit. [3] Wheel speed sensor for a vehicle according to claim 1, characterized by that the assembly unit includes: a first mounting part in close contact with the fastening unit; a second mounting part which is in close contact with the fastening unit and is attachable to and detachable from the first mounting part; and a socket part formed on the first mounting part and / or the second mounting part and coupled to the target object. [4] Wheel speed sensor for a vehicle according to claim 3, characterized by that the first mounting part and the second mounting part are molded from a resin material and the socket part is made of a metal material and is overmolded in the first mounting part or the second mounting part. [5] Wheel speed sensor for a vehicle according to claim 3, characterized by that the first assembly part includes: a first body into which the fastening unit is partially inserted; and a first hook formed on the first body and projecting to engage and fix the second mounting member. [6] Wheel speed sensor for a vehicle according to claim 5, characterized by that the first assembly part includes: a first projection formed on the first body and inserted into the second mounting part to calibrate the mounting position. [7] Wheel speed sensor for a vehicle according to claim 5, characterized by that the second assembly part includes: a second body which is in surface contact with the first body and into which the fastening unit is partially inserted; and a second catch formed and recessed on the second body to engage and secure the first hook.

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