Odometer sensor with heat insulation structure

Abstract

An odometer sensor with a heat insulation structure comprises a clamping head, a clamping groove clamped to a gearbox is formed in the middle of the clamping head, a rotating speed sensing element is arranged in the clamping head and extends out of the clamping head, and a heat insulation ring is arranged on the side, away from the gearbox, of the clamping head. The rotating speed sensing element extends into the heat insulation ring, the rotating speed sensing element is connected with an electronic circuit board, a plug connector is arranged on one side, far away from the rotating speed sensing element, of the electronic circuit board, a heat dissipation ring is arranged on the outer side of the electronic circuit board, one side of the heat dissipation ring is connected with the clamping head, and the other side of the heat dissipation ring is connected with the heat insulation ring. The heat insulation ring is arranged between the clamping head and the heat dissipation ring, the heat insulation ring can play a role in heat insulation and connection, and the heat dissipation ring plays a role in heat dissipation, so that when the temperature in a gearbox is about 150 DEG C, the temperature in an electronic circuit board space of the sensor can be kept below 80 DEG C, and the safety is improved.

Description

Technical Field

[0001] This application relates to an odometer sensor with a heat-insulating structure. Background Technology

[0002] An odometer is a device used to indicate and record the distance a vehicle has traveled. It typically uses a sensor to receive and display the engine speed data from the transmission. Current odometer sensors generally use a speed-sensing element to collect the speed signal, which is then processed by electronic circuitry and converted into a specific signal. Due to the thermal conductivity of the sensor's metal casing, when the temperature inside the transmission is around 150°C, the sensor's internal temperature can reach as high as 120°C, eventually damaging the electronic circuitry and causing the sensor to fail. Therefore, it is necessary to consider the adverse effects of this situation and effectively improve the sensor structure. Utility Model Content

[0003] To address the aforementioned issues, this application proposes a odometer sensor with a heat-insulating structure. The sensor includes a connector with a slot in the center that snaps onto the transmission. A speed sensing element is housed within the connector, extending beyond the connector. A heat-insulating ring is positioned on the side of the connector away from the transmission, into which the speed sensing element extends. The speed sensing element is connected to an electronic circuit board. A connector is located on the side of the electronic circuit board away from the speed sensing element. A heat-dissipating ring is positioned on the outer side of the electronic circuit board, with one side connected to the connector and the other side connected to the heat-insulating ring. This application utilizes a heat-insulating ring positioned between the connector and the heat-dissipating ring. The heat-insulating ring itself provides heat insulation and connection, and combined with the heat dissipation effect of the heat-dissipating ring, when the transmission temperature is around 150°C, the temperature within the sensor's electronic circuit board space can be maintained below 80°C, improving the safety of the electronic circuit board.

[0004] Preferably, a first snap-fit ​​groove is provided on the side of the snap-fit ​​connector facing the electronic circuit board; a second snap-fit ​​groove is provided on the side of the heat dissipation ring facing the snap-fit ​​connector; a first snap-fit ​​ring is provided on the side of the heat insulation ring facing the first snap-fit ​​groove, snapping into the first snap-fit ​​groove; and a second snap-fit ​​ring is provided on the side of the heat insulation ring facing the second snap-fit ​​groove, snapping into the second snap-fit ​​groove. This application provides a first snap-fit ​​ring and a second snap-fit ​​ring on both sides of the heat insulation ring, with the first snap-fit ​​ring positioned in the first snap-fit ​​groove and the second snap-fit ​​ring positioned in the second snap-fit ​​groove. This design simplifies assembly, improves structural reliability, and, in addition to achieving heat insulation, also provides a certain degree of vibration isolation.

[0005] Preferably, the heat dissipation ring is a metal heat dissipation ring.

[0006] Preferably, a central crimping ring is provided in the middle of the plug connector, and a receiving groove for cooperating with the central crimping ring is provided on the side of the heat dissipation ring away from the card connector.

[0007] Preferably, the snap-fit ​​connector includes a lower convex ring facing away from the plug-in connector, an upper convex ring on the side near the plug-in connector, a snap-fit ​​groove between the upper and lower convex rings, and a metal washer on the bottom of the upper convex ring facing the gearbox. This application uses two lower convex rings clamping the connector within the gearbox, resulting in simpler assembly and better structural stability and sealing.

[0008] Preferably, the groove of the snap-fit ​​groove is gradually widened from the lower convex ring to the upper convex ring.

[0009] Preferably, the upper convex ring is a screw-on nut.

[0010] Preferably, the heat insulation ring is a plastic heat insulation ring or a rubber heat insulation ring.

[0011] Preferably, the side of the speed sensing element extending from the connector is provided with an upper protective cover.

[0012] This application can bring the following beneficial effects:

[0013] 1. This application uses a heat insulation ring placed between the card connector and the heat dissipation ring. The heat insulation ring itself can play the role of heat insulation and connection. In addition, the heat dissipation ring can keep the temperature inside the electronic circuit board of the sensor below 80°C when the temperature inside the gearbox is about 150°C, thereby improving the safety of the electronic circuit board.

[0014] 2. This application provides a first snap-fit ​​ring and a second snap-fit ​​ring on both sides of the heat insulation ring. The first snap-fit ​​ring is set in the first snap-fit ​​groove and the second snap-fit ​​ring is set in the second snap-fit ​​groove. The assembly is simple and the structure has good reliability. In addition to achieving the heat insulation effect, it can also have a certain vibration isolation effect.

[0015] 3. This application uses a lower convex ring and a lower convex ring clamping device inside the gearbox, which makes the assembly of the structure simpler and the stability and sealing of the structure better. Attached Figure Description

[0016] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0017] Figure 1 This is a schematic diagram of the structure of this application.

[0018] Figure 2 This is a schematic diagram of the internal structure of this application. Detailed Implementation

[0019] To clearly illustrate the technical features of this solution, the following detailed description, in conjunction with the accompanying drawings, will be provided.

[0020] In the first embodiment, such as Figure 1-2 As shown, a speedometer sensor with a heat-insulating structure includes a connector 1, a slot 3 for attaching to a gearbox 2 in the middle of the connector 1, a speed sensing element 4 inside the connector 1 extending out of the connector 1, a heat insulation ring 5 on the side of the connector 1 away from the gearbox 2, the speed sensing element 4 extending into the heat insulation ring 5, the speed sensing element 4 being connected to an electronic circuit board 6, a connector 7 on the side of the electronic circuit board 6 away from the speed sensing element 4, and a heat dissipation ring 8 on the outer side of the electronic circuit board 6, one side of the heat dissipation ring 8 being connected to the connector 1 and the other side of the heat dissipation ring 8 being connected to the heat insulation ring 5.

[0021] During assembly, the speed sensing element 4 is placed in the snap-fit ​​connector 1, and then a heat insulation ring 5 is installed on the upper part. A chip circuit board is placed above the heat insulation ring 5, and an upper plug-in connector 7 is placed on the upper part. A heat dissipation ring 8 is placed on the outer side. In use, this application is set up with the internal gear of the gearbox 2, and then the snap-fit ​​connector 1 is assembled with the gearbox 2 with the inner side of the snap-fit ​​groove 3, thus completing the installation of this application.

[0022] In the second embodiment, as Figure 1-2 As shown, a speedometer sensor with a heat-insulating structure includes a connector 1, a slot 3 for attaching to a gearbox 2 in the middle of the connector 1, a speed sensing element 4 inside the connector 1 extending out of the connector 1, a heat insulation ring 5 on the side of the connector 1 away from the gearbox 2, the speed sensing element 4 extending into the heat insulation ring 5, the speed sensing element 4 being connected to an electronic circuit board 6, a connector 7 on the side of the electronic circuit board 6 away from the speed sensing element 4, and a heat dissipation ring 8 on the outer side of the electronic circuit board 6, one side of the heat dissipation ring 8 being connected to the connector 1 and the other side of the heat dissipation ring 8 being connected to the heat insulation ring 5.

[0023] A first snap-fit ​​groove 9 is provided on the side of the snap-fit ​​connector 1 facing the electronic circuit board 6; a second snap-fit ​​groove 10 is provided on the side of the heat dissipation ring 8 facing the snap-fit ​​connector 1. A first snap-fit ​​ring 11 is provided on the side of the heat insulation ring 5 facing the first snap-fit ​​groove 9, and a second snap-fit ​​ring 12 is provided on the side of the heat insulation ring 5 facing the second snap-fit ​​groove 10, and a second snap-fit ​​ring 12 is provided on the side of the heat insulation ring 5 facing the second snap-fit ​​groove 10, and a metal heat dissipation ring 8 is provided. A central crimping ring 13 is provided in the middle of the plug connector 7, and a receiving groove 14 for cooperating with the central crimping ring 13 is provided on the side of the heat dissipation ring 8 away from the snap-fit ​​connector 1.

[0024] The snap-fit ​​connector 1 includes a lower convex ring 15 facing away from the plug-in connector 7, and an upper convex ring 16 on the side close to the plug-in connector 7. The snap-fit ​​groove 3 is located between the upper convex ring 16 and the lower convex ring 15. A metal washer 17 is located on the bottom of the upper convex ring 16 facing the gearbox 2. The groove of the snap-fit ​​groove 3 gradually widens from the lower convex ring 15 to the upper convex ring 16. The upper convex ring 16 is a screw nut.

[0025] The heat insulation ring 5 is a plastic heat insulation ring or a rubber heat insulation ring.

[0026] The rotation speed sensing element 4 is provided with an upper protective cover plate 18 on one side of the connector 1.

[0027] During assembly, the speed sensing element 4 is placed in the snap-fit ​​connector 1. Then, a heat insulation ring 5 is installed at the lower part through the first snap-fit ​​ring 11 and the first snap-fit ​​groove 9. A chip circuit board is placed above the heat insulation ring 5. A heat dissipation ring 8 is placed at the upper part through the second snap-fit ​​ring and the second snap-fit ​​groove 10. The chip circuit board and the connector 7 inside the heat dissipation ring 8 are connected to the speed sensing element 4. In use, this application is installed in conjunction with the gear inside the gearbox 2. Then, the snap-fit ​​connector 1 is assembled with the gearbox 2 relative to the inner side of the snap-fit ​​groove 3. The upper convex ring formed by the screw-on nut is used to press it tight, and it abuts against the metal washer 17, thus completing the installation of this application.

[0028] The above are merely embodiments of this application and are not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. A odometer sensor with a heat-insulating structure, characterized in that: The device includes a snap-fit ​​connector with a snap-fit ​​groove in the middle that snaps onto the gearbox. A speed sensing element is disposed inside the snap-fit ​​connector, extending beyond the connector. A heat insulation ring is disposed on the side of the snap-fit ​​connector away from the gearbox, into which the speed sensing element extends. The speed sensing element is connected to an electronic circuit board. A plug-in connector is disposed on the side of the electronic circuit board away from the speed sensing element. A heat dissipation ring is disposed on the outer side of the electronic circuit board, with one side connected to the snap-fit ​​connector and the other side connected to the heat insulation ring.

2. The odometer sensor with a heat-insulating structure as described in claim 1, characterized in that: A first card slot is provided on the side of the card connector facing the electronic circuit board; a second card slot is provided on the side of the heat dissipation ring facing the card connector.

3. The odometer sensor with a heat-insulating structure as described in claim 2, characterized in that: The heat insulation ring has a first snap-fit ​​ring that snaps into the first snap-fit ​​groove on the side facing the first snap-fit ​​groove, and a second snap-fit ​​ring that snaps into the second snap-fit ​​groove on the side facing the second snap-fit ​​groove.

4. The odometer sensor with a heat-insulating structure as described in claim 2, characterized in that: The heat dissipation ring is a metal heat dissipation ring.

5. A odometer sensor with a heat-insulating structure as described in claim 2, characterized in that: A central crimping ring is provided in the middle of the plug connector, and a receiving groove for cooperating with the central crimping ring is provided on the side of the heat dissipation ring away from the card connector.

6. The odometer sensor with a heat-insulating structure as described in claim 1, characterized in that: The snap-fit ​​connector includes a lower protruding ring facing away from the plug connector, an upper protruding ring on the side close to the plug connector, a snap-fit ​​groove between the upper and lower protruding rings, and a metal washer on the bottom of the upper protruding ring facing the gearbox.

7. A odometer sensor with a heat-insulating structure as described in claim 6, characterized in that: The groove of the snap-fit ​​slot gradually widens from the lower convex ring to the upper convex ring.

8. A odometer sensor with a heat-insulating structure as described in claim 6, characterized in that: The upper convex ring is a screw-on nut.

9. A odometer sensor with a heat-insulating structure as described in claim 1, characterized in that: The heat insulation ring is a plastic heat insulation ring or a rubber heat insulation ring.

10. A odometer sensor with a heat-insulating structure as described in claim 1, characterized in that: The speed sensing element is provided with an upper protective cover on the side extending from the connector.

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