Magnetoelectric rotating speed sensor with high sealing performance

Abstract

The embodiment of the utility model provides a magnetoelectric rotating speed sensor with high sealing performance. The magnetoelectric rotating speed sensor comprises a framework, a plug, a first sealing ring, a metal shell, magnetic steel, an iron core and a coil, one end of the framework is embedded in the plug; the framework is provided with an accommodating space; the magnetic steel, the iron core and the coil are arranged in the accommodating space; the magnetic steel is connected with the iron core; the coil is arranged on the periphery of the iron core; the first sealing ring is arranged on the peripheral side of the plug; the metal shell covers the other end of the framework and the first sealing ring; the first sealing ring is used for sealing a connection gap between the plug and the metal shell. According to the invention, the plug is provided with the first sealing ring, and the first sealing ring is used for sealing the connection gap between the plug and the metal housing. Furthermore, the metal shell covers the other end of the framework and the first sealing ring, so that the metal shell plays a structural sealing role on the first sealing ring, that is, the metal shell is matched with the first sealing ring, the sealing strength is enhanced, water vapor is prevented from invading and corroding internal parts, and the use reliability of the equipment is ensured.

Description

Technical Field

[0001] The embodiments of the present disclosure belong to the field of sensor technology, and specifically relate to a high-sealing magnetoelectric speed sensor. Background Art

[0002] The magnetoelectric speed sensor uses magnetoelectric induction as the basic principle to measure the speed. The magnetoelectric speed sensor is composed of iron core, magnetic steel, induction coil and other components. When the measured object rotates, the coil of the speed sensor will generate magnetic lines of force, and the rotation of the gear will cut the magnetic lines of force. Due to the change in magnetic resistance, the magnetic circuit will generate a pulse voltage in the induction coil. The working mode of the magnetoelectric speed sensor determines that it has strong anti-interference ability and can work in environments such as smoke, oil and gas, and water vapor. The magnetoelectric speed sensor has a strong output signal and a wide measurement range. It can measure components such as gears, crankshafts, spokes, and rotating bodies with gaps on the surface.

[0003] The maintenance cost of the magnetoelectric speed sensor is low, and no power is required during operation. The measurement is completely based on magnetoelectric induction. The magnetoelectric speed sensor has a compact structure, small size, easy installation and use, high operating temperature, and can be used with various secondary instruments to monitor the vehicle's driving speed.

[0004] Now more and more heavy-duty vehicle sensors use this type of sensor. It can not only be used for the camshaft and crankshaft of the vehicle engine, but also can be used on gears in harsh environments to monitor the wheel speed of the vehicle. With the high-end development of commercial vehicles, AMT gearboxes will gradually become popular, and the product is in a rising period. However, the iron core, magnetic steel and plastic frame are assembled. After injection molding, there is still a gap between the iron core and the frame, and water vapor will intrude and corrode internal components, resulting in poor reliability.

[0005] Therefore, how to solve the above problems has become a technical problem that needs to be solved urgently by those skilled in the art. Utility Model Content

[0006] The embodiments of the present disclosure aim to solve at least one of the technical problems existing in the prior art and provide a magnetoelectric rotation speed sensor with high sealing performance.

[0007] One aspect of the embodiments of the present disclosure provides a high-sealability magnetoelectric speed sensor, the sensor comprising a frame, a plug, a first sealing ring, a metal shell, a magnetic steel, an iron core and a coil;

[0008] One end of the frame is embedded in the plug; the frame has a containing space; the magnetic steel, the iron core and the coil are arranged in the containing space; wherein the magnetic steel is connected to the iron core; the coil is arranged on the periphery of the iron core;

[0009] The first sealing ring is arranged on the peripheral side of the plug; the metal shell covers the other end of the frame and the first sealing ring; wherein the first sealing ring is used to seal the connection gap between the plug and the metal shell.

[0010] Optionally, a first sealing groove is formed on the plug; and the first sealing ring is arranged in the first sealing groove.

[0011] Optionally, the first sealing ring includes an O-ring.

[0012] Optionally, a first connecting portion is formed on the plug; the metal shell has a second connecting portion; wherein the metal shell is fixed to the plug through the connection between the second connecting portion and the first connecting portion.

[0013] Optionally, the first connecting portion includes a groove; the second connecting portion includes a riveted portion; wherein the metal shell is fixed to the plug through an adaptable connection between the riveted portion and the groove.

[0014] Optionally, the material of the metal shell includes stainless steel.

[0015] Optionally, a second sealing groove is also formed on the plug;

[0016] The sensor further includes a second sealing ring, and the second sealing ring is arranged in the second sealing groove.

[0017] Optionally, the plug is provided with the second sealing groove; the second sealing ring is adapted to be installed in the second sealing groove.

[0018] Optionally, the second sealing ring includes an O-ring.

[0019] The beneficial effects of the embodiments of the present disclosure include:

[0020] In the present disclosure, a first sealing ring is provided on the plug, and the first sealing ring is used to seal the connection gap between the plug and the metal shell. Furthermore, the metal shell is used to cover the other end of the skeleton and the first sealing ring, so that the metal shell plays a structural sealing role for the first sealing ring, that is, the metal shell cooperates with the first sealing ring to strengthen the sealing strength, prevent water vapor from intruding, corrode internal parts, and ensure the reliability of the device. The use of a metal shell can ensure an effective air gap for the product to work. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 The present invention is a schematic structural diagram of a high-sealing magnetoelectric speed sensor according to an embodiment of the present invention.

[0022] In the figure, 1, skeleton; 2, plug; 3, first sealing ring; 4, metal shell; 5, magnet; 6, iron core; 7, coil; 8, second sealing ring; 9, terminal; 21, first sealing groove; 22, first connecting part; 23, second sealing groove; 41, second connecting part. DETAILED DESCRIPTION

[0023] In order to enable those skilled in the art to better understand the technical solution of the present disclosure, the present disclosure is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0024] The following is a further detailed description of the implementation methods of the present application in conjunction with the accompanying drawings and examples. The detailed descriptions and drawings of the following examples are used to illustrate the principles of the present application, but cannot be used to limit the scope of the present application, that is, the present application is not limited to the described embodiments. In the description of the present application, it should be noted that, unless otherwise specified, the meaning of "multiple" is more than two; the orientation or position relationship indicated by the terms "upper", "lower", "left", "right", "inside", "outside", etc. is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. "Vertical" is not vertical in the strict sense, but within the error tolerance range. "Parallel" is not parallel in the strict sense, but within the error tolerance range.

[0025] In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0026] like Figure 1 As shown, a high-sealing magnetoelectric speed sensor includes a frame 1, a plug 2, a first sealing ring 3, a metal shell 4, a magnet 5, an iron core 6 and a coil 7.

[0027] One end of the frame 1 is embedded in the plug 2 . The frame 1 has a containing space. The magnet 5 , the iron core 6 and the coil 7 are arranged in the containing space. The magnet 5 is connected to the iron core 6 . The coil 7 is arranged on the side around the iron core 6 .

[0028] The first sealing ring 3 is arranged on the peripheral side of the plug 2 , and the metal shell 4 covers the other end of the frame 1 and the first sealing ring 3 , wherein the first sealing ring 3 is used to seal the connection gap between the plug 2 and the metal shell 4 .

[0029] In the present disclosure, a first sealing ring 3 is provided on the plug 2, and the first sealing ring 3 is used to seal the connection gap between the plug 2 and the metal shell 4. Furthermore, the metal shell 4 is used to cover the other end of the skeleton 1 and the first sealing ring 3, so that the metal shell 4 plays a structural sealing role for the first sealing ring 3, that is, the metal shell 4 cooperates with the first sealing ring 3 to strengthen the sealing strength, prevent water vapor from intruding, corrode internal parts, and ensure the reliability of the equipment. The use of a metal shell can ensure an effective air gap for the product to work.

[0030] In some embodiments, the plug 2 is provided with a first sealing groove 21, and the first sealing ring 3 is disposed in the first sealing groove 21. By fitting and installing the first sealing groove 21 and the first sealing ring 3, the connection gap between the plug 2 and the metal shell 4 can be effectively sealed.

[0031] In some embodiments, the first sealing ring 3 includes an O-ring.

[0032] In some embodiments, a first connection portion 22 is formed on the plug 2 , and the metal shell 4 has a second connection portion 41 , wherein the metal shell 4 is fixed to the plug 2 via the connection between the second connection portion 41 and the first connection portion 22 .

[0033] In some embodiments, the first connection portion 22 includes a groove, and the second connection portion 41 includes a riveted portion, wherein the metal shell 4 is fixed to the plug 2 by the adaptive connection between the riveted portion and the groove. Specifically, the riveted portion is clamped to the side wall of the groove to achieve the connection between the metal shell 4 and the groove. With this arrangement, the connection reliability between the metal shell 4 and the plug 2 can be effectively guaranteed. On the other hand, the sealing effect can be further enhanced by clamping the riveted portion to the side wall of the groove.

[0034] In some embodiments, the material of the metal housing 4 includes stainless steel.

[0035] In some embodiments, a second sealing groove 23 is further formed on the plug 2 . The sensor further comprises a second sealing ring 8 , which is disposed in the second sealing groove 23 .

[0036] Specifically, the plug 2 is provided with a second sealing groove 23 , and the second sealing ring 8 is adapted to be installed in the second sealing groove 23 .

[0037] In some embodiments, the second sealing ring 8 includes an O-ring.

[0038] In some embodiments, the sensor further has a terminal 9 , which is disposed in the plug 2 .

[0039] In some embodiments, the material of the frame 1 is a high temperature resistant material. For a magnetoelectric speed sensor with a metal housing 4, the high temperature resistant material needs to be able to withstand a high temperature of 200°C and not have performance degradation during the subsequent product life cycle.

[0040] In summary, the speed sensor disclosed in the present invention is resistant to high temperatures and has good product sealing and reliability.

[0041] It is to be understood that the above embodiments are merely exemplary embodiments used to illustrate the principles of the present disclosure, but the present disclosure is not limited thereto. For those of ordinary skill in the art, various modifications and improvements can be made without departing from the spirit and substance of the present disclosure, and these modifications and improvements are also considered to be within the scope of protection of the present disclosure.

Claims

1. A high-sealing magnetoelectric speed sensor, characterized in that: The sensor comprises a frame, a plug, a first sealing ring, a metal shell, a magnetic steel, an iron core and a coil; One end of the frame is embedded in the plug; the frame has a containing space; the magnetic steel, the iron core and the coil are arranged in the containing space; wherein the magnetic steel is connected to the iron core; the coil is arranged on the periphery of the iron core; The first sealing ring is arranged on the peripheral side of the plug; the metal shell covers the other end of the frame and the first sealing ring; wherein the first sealing ring is used to seal the connection gap between the plug and the metal shell.

2. A high-sealing magnetoelectric speed sensor according to claim 1, characterized in that: The plug is provided with a first sealing groove; the first sealing ring is arranged in the first sealing groove.

3. A high-sealing magnetoelectric speed sensor according to claim 2, characterized in that: The first sealing ring comprises an O-ring.

4. A high-sealing magnetoelectric speed sensor according to any one of claims 1 to 3, characterized in that: The plug is formed with a first connection portion; the metal shell has a second connection portion; wherein the metal shell is fixed to the plug through the connection between the second connection portion and the first connection portion.

5. A high-sealing magnetoelectric speed sensor according to claim 4, characterized in that: The first connecting portion includes a groove; the second connecting portion includes a riveted portion; wherein the metal shell is fixed to the plug through the adaptive connection between the riveted portion and the groove.

6. A high-sealing magnetoelectric speed sensor according to claim 1, characterized in that: The material of the metal shell includes stainless steel.

7. The high-sealing magnetoelectric speed sensor according to claim 1, characterized in that: A second sealing groove is also formed on the plug; The sensor further includes a second sealing ring, and the second sealing ring is arranged in the second sealing groove.

8. The high-sealing magnetoelectric speed sensor according to claim 7, characterized in that: The plug is provided with the second sealing groove; the second sealing ring is adapted to be installed in the second sealing groove.

9. The high-sealing magnetoelectric speed sensor according to claim 7, characterized in that: The second sealing ring includes an O-ring.

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