CN219065503U - Wheel speed sensor and corresponding vehicle - Google Patents

Abstract

The utility model discloses a wheel speed sensor, comprising: -a sensor head (11), the sensor head (11) comprising at least one sensor chip (111) and at least two electrical connection elements (112) electrically connected to the sensor chip (111); and a transmission part (12), wherein the transmission part (12) comprises at least two transmission conductors (121), the transmission conductors (121) are provided with electric connection terminals (1211), and the electric connection elements (112) are electrically connected with the corresponding electric connection terminals (1211) through an interference fit plug-in mode. A corresponding vehicle is also disclosed. According to some embodiments of the present utility model, a wheel speed sensor may be made more compact, particularly with a relatively small maximum outer diameter, and simpler to manufacture.

Description

Wheel speed sensor and corresponding vehicle

Technical Field

The present utility model relates to a wheel speed sensor and a corresponding vehicle.

Background

Wheel speed is one of the important parameters of vehicle control, which is typically detected by a wheel speed sensor, and may provide valuable wheel speed information for devices, equipment or systems, such as an Electronic Stability Program (ESP), an Antilock Brake System (ABS), a control system of an automatic transmission, a booster system, etc., that are disposed on the vehicle. This is of great importance in ensuring and enhancing the control of the operation, safe driving, drivability, etc. of the vehicle.

However, due to limitations in installation space and continual pursuit of performance, existing wheel speed sensors still have some drawbacks and shortcomings in terms of, for example, structural construction, compactness, manufacturing process, use cost control, signal redundancy implementation, and reliability.

Thus, further improvements are needed.

Disclosure of Invention

In order to overcome one of the above-mentioned drawbacks and/or other drawbacks possible in the prior art not mentioned herein, it is an object of the present utility model to provide an improved wheel speed sensor and a corresponding vehicle.

According to a first aspect of the present utility model, there is provided a wheel speed sensor including: a sensor head comprising at least one sensor chip and at least two electrical connection elements electrically connected to the sensor chip; and a transmission part comprising at least two transmission conductors with electrical connection terminals, wherein the electrical connection elements establish electrical connection with the corresponding electrical connection terminals in an interference fit manner.

According to an alternative embodiment of the utility model, the electrical connection element is provided with a socket, and the electrical connection terminal is configured as a plug adapted to be plugged into the socket to establish an electrical connection between the electrical connection terminal and the corresponding electrical connection element.

According to an alternative embodiment of the utility model, the transmission conductor comprises a wire, and the plug is fixed at the end of the wire by a crimping process.

According to an alternative embodiment of the utility model, the electrical connection element has a bent end, the receptacle being formed at the bent end.

According to an alternative embodiment of the utility model, the at least one sensor chip comprises a first sensor chip and a second sensor chip, the at least two electrical connection elements comprising a first electrical connection element, a second electrical connection element, and a third electrical connection element, a fourth electrical connection element, which are provided to the first sensor chip.

According to an alternative embodiment of the utility model, the first sensor chip and the second sensor chip are arranged side by side.

According to an alternative embodiment of the utility model, the first sensor chip and the second sensor chip are identical and are arranged redundantly with respect to each other.

According to an alternative embodiment of the utility model, the first electrical connection element, the second electrical connection element, the third electrical connection element and the fourth electrical connection element are arranged side by side in sequence.

According to an alternative embodiment of the utility model, the first electrical connection element, the second electrical connection element, the third electrical connection element and the fourth electrical connection element are pre-connected in a unitary structure.

According to an alternative embodiment of the utility model, the sensor head further comprises a support body having a first side and a second side opposite to the first side and provided with through holes, the plugs being inserted from the first side through the respective through holes into respective receptacles located at the second side.

According to an alternative embodiment of the utility model, the support body comprises four through holes, each at a respective vertex of a quadrilateral.

According to an alternative embodiment of the utility model, the support body is at least partly made of plastic.

According to an alternative embodiment of the present utility model, the support body is configured to be stepped with a first stepped portion in which two through holes are provided and a second stepped portion arranged offset from the first stepped portion in which the other two through holes are provided.

According to an alternative embodiment of the utility model, the quadrilateral is trapezoidal.

According to an alternative embodiment of the present utility model, one of the first electrical connection element and the second electrical connection element is configured to one through hole in the first step portion, and the other of the first electrical connection element and the second electrical connection element is configured to one through hole in the second step portion; and one of the third electrical connection element and the fourth electrical connection element is disposed to the other through hole in the first step portion, and the other of the third electrical connection element and the fourth electrical connection element is disposed to the other through hole in the second step portion.

According to an alternative embodiment of the utility model, the first electrical connection element and the fourth electrical connection element are respectively configured to two through holes in the first step; the second electrical connection element and the third electrical connection element are respectively configured to two through holes in the second step portion; and the bent ends of the first and fourth electrical connection elements are bent in a first direction, and the bent ends of the second and third electrical connection elements are bent in a second direction opposite to the first direction.

According to an alternative embodiment of the utility model, a part of the electrical connection element, the electrical connection terminal and the support body are embedded in a one-shot injection-molded structure by a first injection-molding.

According to an alternative embodiment of the utility model, the electrical connection element is embedded in the one-piece structure by the first injection molding in the one-piece injection molded structure.

According to an alternative embodiment of the utility model, the portion of the wire adjacent to the electrical connection terminal is embedded within the one-shot injection-molded structure by the first injection-molding.

According to an alternative embodiment of the utility model, the one-shot injection-molded structure is formed with a receptacle for receiving the sensor chip, a portion of the electrical connection element being exposed to the one-shot injection-molded structure to allow electrical connection to be established with the sensor chip within the receptacle.

According to an alternative embodiment of the utility model, the one-shot injection-molded structure is formed with a fitting lug, which is embedded with a metal ring by the first injection molding to form a fitting hole.

According to an alternative embodiment of the utility model, the sensor chip is electrically connected to the corresponding electrical connection element by soldering.

According to an alternative embodiment of the utility model, the unitary structure is configured and adapted to electrically isolate the individual electrical connection elements from each other by a separation step.

According to an alternative embodiment of the present utility model, the wheel speed sensor further includes a two-shot injection-molded structure formed on the one-shot injection-molded structure by a second injection-molding to cover at least the exposed portion of the electrical connection element and the sensor chip.

According to a second aspect of the present utility model, there is provided a vehicle including a wheel speed sensor according to any one of the embodiments described above.

According to some embodiments of the present utility model, a wheel speed sensor may be made more compact, particularly with a relatively small maximum outer diameter, and simpler to manufacture.

Drawings

The principles, features and advantages of the present utility model may be better understood by describing the present utility model in more detail with reference to the drawings. The drawings include:

FIG. 1 illustrates a perspective view of a wheel speed sensor according to an exemplary embodiment of the present utility model prior to final injection molding encapsulation.

Fig. 2 is a perspective view showing a connection state between a transmission conductor and an electrical connection element of a transmission part of a wheel speed sensor according to an exemplary embodiment of the present utility model.

Fig. 3 shows a perspective view of one end of a transmission part to better present a transmission conductor according to an exemplary embodiment of the present utility model.

Fig. 4 shows a perspective view of a preform of an electrical connection element as an intermediate element between a sensor chip and a transmission part according to an exemplary embodiment of the utility model.

Fig. 5 illustrates the preform and support combination of fig. 4 according to an exemplary embodiment of the present utility model.

Fig. 6 shows a front view of an electrical connection terminal in the form of a plug according to an exemplary embodiment of the present utility model, separately.

Fig. 7 shows a perspective view of an embedded metal ring according to an exemplary embodiment of the present utility model in isolation.

Fig. 8 shows a perspective view of a finally formed wheel speed sensor according to an exemplary embodiment of the present utility model.

Fig. 9 shows a perspective view of the wheel speed sensor shown in fig. 8 from another perspective.

Fig. 10 shows a front view of the wheel speed sensor shown in fig. 8.

Fig. 11 shows the wheel speed sensor shown in fig. 8 in a rear view with respect to fig. 10.

List of reference numerals

1. Wheel speed sensor

11. Sensor head

111. Sensor chip

112. Electric connecting element

1121. Jack (Jack)

1122. Bent end

1123. Bare part

113. Support body

1131. First side

1132. Second side

1133. Through hole

1134. A first step part

1135. A second step part

114. Integrated structure

12. Transmission part

121. Transmission conductor

1211. Electric connection terminal

1212. Conducting wire

13. One-step injection molding structure

131. Receiving seat

132. Fitting lug

1321. Assembly hole

133. Metal ring

14. Secondary injection molding structure

Detailed Description

According to one aspect of the present utility model, as shown in fig. 1 and 2, there is provided a wheel speed sensor, in particular for measuring a wheel speed of a vehicle, the wheel speed sensor 1 comprising: a sensor head 11, the sensor head 11 comprising at least one sensor chip 111 and at least two electrical connection elements 112 electrically connected to the sensor chip 111; and a transmission part 12, the transmission part 12 comprising at least two transmission conductors 121, the transmission conductors 121 having electrical connection terminals 1211, wherein the electrical connection elements 112 establish electrical connection with the respective electrical connection terminals 1211 by means of an interference fit. It can be seen that the electrical connection element 112 herein serves as an intermediate connection element between the sensor chip 111 and the transmission conductor 121, and by making an interference fit between the electrical connection element 112 and the electrical connection terminal 1211 of the transmission conductor 121, the stability and simplicity of assembly can be greatly improved, providing a good basis for subsequent encapsulation.

The transmission conductor 121 of the transmission part 12 is used for transmitting electric energy and/or electrical signals, and may comprise a plurality of wires 1212, which may be encased in a sheath.

As shown in fig. 2, 3 and 4, according to an exemplary embodiment of the present utility model, the electrical connection element 112 is provided with a receptacle 1121, and the electrical connection terminal 1211 is configured as a plug adapted to be inserted into the receptacle 1121 to establish an electrical connection between the electrical connection terminal 1211 and the corresponding electrical connection element 112.

According to an exemplary embodiment of the present utility model, the plug is fixed at the end of the wire 1212 through a crimping process. Fig. 6 shows a specific plug form. The plug tightly wraps the wire by winding.

As shown in particular in fig. 6, the plug is at least partially tapered so that an interference fit can be easily achieved. In addition, the plug can also generate radial elastic deformation, thereby being beneficial to realizing reliable plug-in connection. In addition, the plug may be configured with a localized constriction such that only a certain pulling force is applied after insertion to disengage the plug from the receptacle 1121. The utility model is not limited to this, but any other possible plug design is also possible.

According to an exemplary embodiment of the present utility model, as shown in fig. 4, the electrical connection element 112 has a bent end 1122, and a receptacle 1121 is formed at the bent end 1122. This bent arrangement makes it possible on the one hand to better construct the receptacle 1121 suitable for a plug-in connection and on the other hand to convert the ends of the sheet-like electrical connection elements 112 arranged side by side into a spatial distribution, so that the dimensions of the electrical connection elements 112 in the direction of the side by side arrangement can be reduced, which makes it possible to design the wheel speed sensor compactly.

According to an exemplary embodiment of the present utility model, as shown in fig. 1 and 2 (and may be combined with fig. 3-5), the at least one sensor chip 111 comprises a first sensor chip and a second sensor chip, and the at least two electrical connection elements 112 comprise a first electrical connection element, a second electrical connection element, and a third electrical connection element, a fourth electrical connection element, which are configured to the first sensor chip. As can be seen from the figure, a total of four strip-shaped electrical connection elements 112 are included.

Wheel speed sensors are very important for the control of vehicles, and for safety and reliability reasons, wheel speed sensors are generally equipped with two sensor chips that are identical and are redundantly arranged with respect to each other.

As shown in fig. 1, the first sensor chip and the second sensor chip are preferably arranged side by side. Accordingly, as shown in fig. 2, 4 and 5, the first electrical connection element, the second electrical connection element, the third electrical connection element and the fourth electrical connection element are arranged side by side in this order. For ease of understanding only, the electrical connection element 112 labeled with a reference numeral in fig. 2 may be considered a first electrical connection element, followed by a second, third, and fourth electrical connection element in that order.

As shown in fig. 2 and 4, according to an exemplary embodiment of the present utility model, the first electrical connection element, the second electrical connection element, the third electrical connection element, and the fourth electrical connection element are pre-connected in a unitary structure 114. By "integral" is meant that the first, second, third and fourth electrical connection elements, which act as conductive paths, are held together so that the relative position between them can be reliably ensured and the operation during the manufacturing process is facilitated. These electrical connection elements may be interconnected together by conductive material or may be interconnected together by insulating material. It will be appreciated that if interconnected together by conductive material, these electrical connection elements will then also need to be separated at some stage of manufacture to ensure proper electrical connection relationship in the end. Preferably, the unitary structure 114 is formed from the same conductive material, such as sheet metal, by stamping and/or bending, with residual connection structure between adjacent electrical connection elements (see fig. 2 and 4). These residual connection structures may be broken, e.g. cut, at a certain manufacturing stage. The method is simple and efficient.

According to an exemplary embodiment of the utility model, as shown in fig. 2 and 5, the sensor head 11 further comprises a support body 113, said support body 113 having a first side 1131 and a second side 1132 opposite to the first side 1131 and being provided with through holes 1133, said plugs being inserted from the first side 1131 through the respective through holes 1133 into respective receptacles 1121 located at the second side 1132. The support 113 not only contributes to the plug-in connection itself, but also provides a more reliable relative position assurance for subsequent manufacturing.

As shown in fig. 5, according to an exemplary embodiment of the present utility model, the support body 113 includes four through holes 1133 respectively located at respective vertices of a quadrilateral. That is, the four through holes 1133 are connected to each other to form one quadrangle. The quadrilateral is preferably a trapezoid, in particular an isosceles trapezoid.

According to an exemplary embodiment of the present utility model, as shown in fig. 5, the support body 113 is configured in a stepped shape having a first stepped portion 1134 and a second stepped portion 1135 disposed offset from the first stepped portion 1134, wherein two through holes 1133 are provided in the first stepped portion 1134 and the other two through holes 1133 are provided in the second stepped portion 1135.

According to an exemplary embodiment of the utility model, the support 113 is at least partially made of plastic. The support 113 made of plastic can be well combined with the subsequent injection molding material.

As can be understood from referring to fig. 2 and 5 in combination with fig. 4, one of the first and second electrical connection elements is provided to one through hole 1133 in the first step 1134, the other of the first and second electrical connection elements is provided to one through hole 1133 in the second step 1135, one of the third and fourth electrical connection elements is provided to the other through hole 1133 in the first step 1134, and the other of the third and fourth electrical connection elements is provided to the other through hole in the second step 1135.

More preferably, the first and fourth electrical connection elements are respectively configured to the two through holes 1133 in the first step 1134, and the second and third electrical connection elements are respectively configured to the two through holes 1133 in the second step 1135. At this time, the bent ends 1122 of the first and fourth electrical connection elements are bent in a first direction, and the bent ends 1122 of the second and third electrical connection elements are bent in a second direction opposite to the first direction.

Returning again to fig. 1, according to one exemplary embodiment of the utility model, a portion of the electrical connection element 112, the electrical connection terminal 1211 and the support 113 are embedded within the one-shot injection molded structure 13 by a first injection molding.

As can be seen from fig. 1, the portion of the wire 1212 adjacent to the electrical connection terminal 1211 is also embedded in the one-shot injection-molded structure 13 by the first-shot injection molding. Preferably, the electrical connection element 112 is embedded in the primary injection molded structure 13 by said primary injection molding in a unitary structure 114, which facilitates said primary injection molding.

Preferably, a portion of the electrical connection elements 112 is exposed to the one-shot injection-molded structure 13, which on the one hand may facilitate the separation of the individual electrical connection elements 112 previously interconnected together when necessary, and on the other hand may also facilitate the electrical connection of the electrical connection elements 112 with the sensor chip 111.

More specifically, as shown in fig. 1, the primary injection molded structure 13 is formed with a receiving seat 131, such as a recess, for subsequently receiving the sensor chip 111, and a portion of the electrical connection element 112 is exposed to the primary injection molded structure 13 to allow electrical connection to be established with the sensor chip 111 within the receiving seat 131. The sensor chip 111 is preferably electrically connected to the corresponding electrical connection element 112 by soldering.

According to an exemplary embodiment of the present utility model, as shown in fig. 1, the one-shot injection molded structure 13 is formed with a fitting lug 132, and the fitting lug 132 is embedded with a metal ring 133 (shown separately in fig. 7) by a first injection molding to form a fitting hole 1321. By embedding the metal ring 133, a stable fitting hole 1321 can be formed.

As mentioned above, encapsulation is also required since the sensor chip 111 (and possibly a part of the electrical connection element 112) is still exposed. To this end, according to an exemplary embodiment of the present utility model, the wheel speed sensor further includes a two-shot injection-molded structure 14 formed on the one-shot injection-molded structure 13 by a second injection-molding to cover at least the exposed portion 1123 of the electrical connection element 112 and the sensor chip 111. The second injection molding is performed with ensuring electrical isolation between the electrical connection elements 112, so that such electrical isolation can be firmly ensured and all charged portions of the wheel speed sensor can be reliably encapsulated and protected through the second injection molding.

The second injection molding is performed on the one-shot injection molded structure 13 produced by the first injection molding. It is contemplated that locating features may be formed in the primary injection molded structure 13 to assist in locating the primary injection molded structure 13 during the secondary injection molding.

Fig. 9, 10 and 11 show the wheel speed sensor 1 finally formed. It can be seen that no charged portion is exposed and the structure is also very compact.

According to another aspect of the present utility model, there is provided a vehicle including the wheel speed sensor 1 of any one of the embodiments described above.

Claims (15)

1. A wheel speed sensor, characterized in that the wheel speed sensor (1) includes:

-a sensor head (11), the sensor head (11) comprising at least one sensor chip (111) and at least two electrical connection elements (112) electrically connected to the sensor chip (111); and

a transmission section (12), the transmission section (12) comprising at least two transmission conductors (121), the transmission conductors (121) having electrical connection terminals (1211),

wherein the electrical connection element (112) and the corresponding electrical connection terminal (1211) are electrically connected by means of interference fit.

2. The wheel speed sensor according to claim 1, wherein,

the electrical connection elements (112) are provided with receptacles (1121), the electrical connection terminals (1211) being configured as plugs adapted to be plugged into the receptacles (1121) to establish an electrical connection between the electrical connection terminals (1211) and the respective electrical connection elements (112).

3. A wheel speed sensor according to claim 2, wherein,

the transmission conductor (121) comprises a wire (1212), the plug being fixed at the end of the wire (1212) by a crimping process; and/or

The electrical connection element (112) has a bent end (1122), the receptacle (1121) being formed at the bent end (1122).

4. A wheel speed sensor according to claim 3, wherein,

the at least one sensor chip (111) comprises a first sensor chip and a second sensor chip, and the at least two electrical connection elements (112) comprise a first electrical connection element, a second electrical connection element, which are configured to the first sensor chip, and a third electrical connection element, a fourth electrical connection element, which are configured to the second sensor chip.

5. The wheel speed sensor according to claim 4, wherein,

the first sensor chip and the second sensor chip are arranged side by side; and/or

The first sensor chip and the second sensor chip are identical and are redundantly configured with respect to each other; and/or

The first electrical connection element, the second electrical connection element, the third electrical connection element and the fourth electrical connection element are arranged side by side in sequence; and/or

The first electrical connection element, the second electrical connection element, the third electrical connection element and the fourth electrical connection element are pre-connected as a unitary structure (114).

6. The wheel speed sensor according to claim 5, wherein,

the sensor head (11) further comprises a support body (113), the support body (113) having a first side (1131) and a second side (1132) opposite to the first side (1131) and being provided with through holes (1133), the plug being inserted from the first side (1131) through a respective through hole (1133) into a respective receptacle (1121) located at the second side (1132).

7. The wheel speed sensor according to claim 6, wherein,

the support body (113) comprises four through holes (1133) respectively positioned at the vertexes of a quadrilateral; and/or

The support body (113) is at least partially made of plastic.

8. The wheel speed sensor according to claim 7, wherein,

the support body (113) is configured to be stepped with a first stepped portion (1134) and a second stepped portion (1135) arranged offset from the first stepped portion (1134), wherein two through holes (1133) are provided in the first stepped portion (1134), and the other two through holes (1133) are provided in the second stepped portion (1135); and/or

The quadrangle is trapezoid.

9. The wheel speed sensor according to claim 8, wherein,

one of the first and second electrical connection elements is configured to one through hole (1133) in the first step (1134), and the other of the first and second electrical connection elements is configured to one through hole (1133) in the second step (1135); and

one of the third and fourth electrical connection elements is configured to another through hole (1133) in the first step (1134), and the other of the third and fourth electrical connection elements is configured to another through hole in the second step (1135).

10. The wheel speed sensor according to claim 9, wherein,

the first and fourth electrical connection elements are respectively configured to two through holes (1133) in the first step (1134);

the second and third electrical connection elements are respectively configured to two through holes (1133) in the second step (1135); and

the bent ends (1122) of the first and fourth electrical connection elements are bent in a first direction, and the bent ends (1122) of the second and third electrical connection elements are bent in a second direction opposite to the first direction.

11. The wheel speed sensor according to claim 10, wherein,

a part of the electrical connection element (112), the electrical connection terminal (1211) and the support body (113) are embedded in a one-shot injection-molded structure (13) by a first injection molding.

12. The wheel speed sensor according to claim 11, wherein,

the electrical connection element (112) is embedded in the primary injection-molded structure (13) by the primary injection molding in the integral structure (114); and/or

A portion of the wire (1212) adjacent to the electrical connection terminal (1211) is embedded in the primary injection molded structure (13) by the primary injection molding; and/or

-the primary injection-molded structure (13) is formed with a receptacle (131) for receiving the sensor chip (111), a portion of the electrical connection element (112) being exposed to the primary injection-molded structure (13) allowing an electrical connection to be established with the sensor chip (111) within the receptacle (131); and/or

The one-shot injection molding structure (13) is formed with a fitting lug (132), and the fitting lug (132) is embedded with a metal ring (133) by the first injection molding to form a fitting hole (1321).

13. The wheel speed sensor according to claim 12, wherein,

the sensor chip (111) is electrically connected to a corresponding electrical connection element (112) by soldering; and/or

The unitary structure (114) is configured and adapted to electrically isolate the individual electrical connection elements (112) from each other by a separation step.

14. The wheel speed sensor according to any one of claims 11 to 13, wherein,

the wheel speed sensor further includes a secondary injection molded structure (14) formed on the primary injection molded structure (13) by secondary injection molding to cover at least the exposed portion (1123) of the electrical connection element (112) and the sensor chip (111).

15. A vehicle characterized in that it comprises a wheel speed sensor according to any one of claims 1-14.

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