Integrated crankshaft position sensor

Abstract

The utility model relates to an integrated crankshaft position sensor, which comprises a sensor main body, a plug wire seat, a side cover, a wire harness and a buckle, the plug wire seat is provided with an open slot used for connecting the sensor main body, a groove used for bonding the side cover and an interface end used for connecting the wire harness, the sensor main body is sleeved between the plug wire seat and the side cover, and the buckle is arranged on the plug wire seat. The sensor main body is provided with a contact for signal transmission, the contact passes through the open slot and extends to the interface end, one end of the wire harness passes through the interface end and is electrically connected to the contact, and the wire harness is clamped to the interface end through a buckle; the utility model mainly aims to integrate the crankshaft position sensor, avoid the phenomenon of looseness among parts, remarkably improve the anti-vibration effect and the sealing effect of the sensor, and prolong the service life of the sensor.

Description

Technical Field

[0001] This utility model relates to the technical field of sensors, and in particular to an integrated crankshaft position sensor. Background Technology

[0002] In the design of traditional crankshaft position sensors, the sensor part and the wiring harness part are usually connected by a pluggable connection structure. Although this split design makes it easy to install and maintain the crankshaft position sensor, the plug interface between the two is prone to loosening under the high-frequency vibration environment generated by the car engine during operation, which leads to poor contact of the contacts and causes the crankshaft position signal to be lost, seriously affecting the normal operation of the engine control system. Utility Model Content

[0003] To overcome the shortcomings of the prior art, the technical solution adopted by this utility model is: an integrated crankshaft position sensor, including a sensor body, a connector, a side cover, a wire harness, and a buckle. The connector has an opening groove for connecting the sensor body, a groove for bonding the side cover, and an interface end for connecting the wire harness. The sensor body is sleeved between the connector and the side cover. The sensor body has contacts for signal transmission. The contacts extend through the opening groove to the interface end. One end of the wire harness passes through the interface end and is electrically connected to the contacts. The wire harness is snapped to the interface end by the buckle.

[0004] Using the above technical solution, during installation, the wire harness passes through the interface end, the opening slot, and out of the groove in sequence. After the copper core is soldered to the contact point, the sensor body is then snapped into the opening slot. At this time, part of the wire harness is pulled out from the interface end and glued to the side cover using the groove to form a seamless sealing structure. This integrates the crankshaft position sensor, avoids loosening between components, significantly improves the sensor's vibration resistance and sealing effect, and extends the sensor's service life.

[0005] The present invention is further configured such that the sensor body has a first cylindrical part, a second cylindrical part and a third cylindrical part, the side cover has a first stepped surface for limiting the first cylindrical part, and the side cover has an inner cavity adapted to the first cylindrical part, the plug is used to limit the second stepped surface of the second cylindrical part, and the third cylindrical part is engaged with the opening groove.

[0006] By adopting the above technical solution, the first and second step surfaces of the sensor body limit the sensor body at both ends, respectively, to prevent the sensor body from moving axially between the side cover and the socket, so that the height of the assembled sensor is uniform, effectively controlling the distance between the sensor's sensing end and the signal teeth, which is conducive to assembly and debugging.

[0007] The present invention is further configured such that a washer is provided at the second stepped surface of the socket, and the second cylindrical part abuts against the socket through the washer.

[0008] By adopting the above technical solution, the washer is set perpendicular to the axis of the connector, so that the axial pressure of the second cylinder is evenly distributed, avoiding the sensor body from tilting due to uneven force, and ensuring the perpendicularity of the sensor to the signal detection surface.

[0009] The present invention is further configured such that the opening groove is adapted to the outer contour of the third cylindrical part, and the third cylindrical part is provided with a limiting surface for restricting the axial rotation of the sensor body.

[0010] By adopting the above technical solution, the opening slot effectively prevents the sensor body from rotating axially during vehicle vibration, and avoids damage to the welding points of the contacts and wiring harness due to the rotational displacement of the sensor body.

[0011] The present invention is further configured such that the contact point has a through hole for threading wires and a protrusion for wrapping solder, the protrusion being disposed around the through hole.

[0012] By adopting the above technical solution, during soldering, the copper wires of the wire harness pass through the through hole and are soldered on one side of the protrusion. The protrusion forms a groove for accumulating solder, reducing the risk of cold solder joints.

[0013] The present invention is further configured such that the sensor body is provided with a sensing end, the side cover is provided with a through groove, and the sensing end extends outward through the through groove.

[0014] By adopting the above technical solution, the exposed sensing end effectively avoids affecting the detection accuracy of the Hall chip due to excessively thick side covers, thereby improving the sensitivity of the sensor.

[0015] The present invention is further configured such that a bushing for installation is provided on one side of the socket, and a sealing groove is provided on the outer side of the side cover, which is offset from the first step surface.

[0016] The above technical solution uses a metal ring embedded in the connector to connect to the engine. An O-ring is installed through a sealing groove, thereby improving the sealing effect of the connection surface between the crankshaft position sensor and the engine, preventing foreign objects from entering between the sensing end and the signal teeth, and providing accurate and reliable crankshaft position signals for the engine's central control system.

[0017] Using the above technical solution, the sealing element is integrally formed with a first sealing part and a second sealing part. The first sealing part and the second sealing part respectively achieve axial sealing and radial sealing at the connection between the housing and the side cover. The innovative two-seal structure significantly improves the waterproof performance and service life of the crankshaft position sensor.

[0018] The present invention is further configured such that the housing is provided with a limiting part coaxially distributed with the mounting part, the sealing member is provided with a central hole, and the sealing member is sleeved on the mounting part through the central hole, and the first sealing part is engaged between the mounting part and the limiting part.

[0019] Furthermore, the side cover is provided with internal threads, and the mounting part is provided with studs that are adapted to the internal threads.

[0020] By adopting the above technical solution, during the threaded installation process of the side cover, the limiting part acts as a rigid limiting stop, which effectively prevents the deformation of the sealing structure caused by the squeezing of the side cover and maintains the stability of the sealing structure.

[0021] The present invention is further configured such that the first sealing part is U-shaped in general, and the first sealing part is provided with a groove, and the side cover is provided with an annular part corresponding to the groove, and the end face of the annular part is engaged in the groove.

[0022] By adopting the above technical solution, the end face of the side cover extends and forms a non-threaded annular part, ensuring that the annular part fits tightly with the slot and improving the sealing performance of the side cover in the axial position.

[0023] The present invention is further configured such that the second sealing part is in the shape of an inverted V, and the second sealing part is provided with a downwardly inclined side arm facing the slot, the side arm abutting against the inner side of the ring part.

[0024] Furthermore, the slot has an inner circular surface, and the outer diameter of the side arm is larger than the inner diameter of the inner circular surface.

[0025] Using the above technical solution, the second sealing part is designed as an adaptive one-way sealing structure, which fits tightly against the inner wall of the side cover. When the air pressure inside the side cover is too high, the air pressure forces the side arm to deform and discharge the gas outward, thereby achieving the function of pressure relief and preventing the instantaneous increase in air pressure from affecting the installation of the sensor. Conversely, when the air pressure outside the side cover is too high, the air pressure makes the side wall and the side cover press tighter and tighter, thereby improving the radial sealing effect of the side cover.

[0026] The embodiments of this utility model will be further described below with reference to the accompanying drawings. Attached Figure Description

[0027] Figure 1 This is the front view of the present invention;

[0028] Figure 2 This is an exploded view of the sensor portion of this utility model;

[0029] Figure 3 This is a perspective view of the sensor body of this utility model;

[0030] Figure 4 This is a cross-sectional view of the socket of this utility model;

[0031] Figure 5 This is a bottom view of the socket of this utility model;

[0032] Figure 6 This is a cross-sectional view of the side cover of this utility model;

[0033] Figure 7 For the present utility model Figure 3 A magnified view of the central A-direction view;

[0034] Wherein: 1-Sensor body, 2-Socket, 3-Side cover, 4-Wire harness, 5-Snap fastener, 6-Washer, 7-Bushing, 8-O-ring, 11-Contact, 12-First cylindrical part, 13-Second cylindrical part, 14-Third cylindrical part, 15-Limiting surface, 16-Through hole, 17-Protrusion, 18-Sensing end, 21-Opening groove, 22-Groove, 23-Interface end, 24-Second step surface, 31-First step surface, 32-Inner cavity, 33-Through groove, 34-Sealing groove; Detailed Implementation

[0035] like Figure 1-3 As shown, this embodiment provides an integrated crankshaft position sensor, including a sensor body 1, a connector 2, a side cover 3, a wiring harness 4, and a clip 5. The connector 2 has an opening slot 21 for connecting the sensor body 1, a groove 22 for bonding the side cover 3, and an interface end 23 for connecting the wiring harness 4. The sensor body 1 is sleeved between the connector 2 and the side cover 3. The sensor body 1 has a contact 11 for signal transmission. The contact 11 extends through the opening slot 21 to the interface end 23. One end of the wiring harness 4 passes through the interface end 23 and is electrically connected to the contact 11. The wiring harness 4 is clipped to the interface end 23 by the clip 5.

[0036] Combination Figure 4 , 6 As shown, in this embodiment, the sensor body 1 is provided with a first cylindrical part 12, a second cylindrical part 13 and a third cylindrical part 14. The side cover 3 is provided with a first stepped surface 31 for limiting the first cylindrical part 12, and the side cover 3 is provided with an inner cavity 32 that is adapted to the first cylindrical part 12. The connector 2 is used to limit the second stepped surface 24 of the second cylindrical part 13. The third cylindrical part 14 is snapped into the opening slot 21. The two ends of the sensor body 1 are respectively limited by the first stepped surface 31 and the second stepped surface 24 to prevent the sensor body 1 from moving axially between the side cover 3 and the connector 2, so that the height of the assembled sensor is uniform.

[0037] In this embodiment, a washer 6 is provided at the second step surface 24 of the socket 2. The second cylindrical part 13 abuts against the socket 2 through the washer 6. The washer 6 is set perpendicular to the axis of the socket 2, so that the axial pressure of the second cylindrical part 13 is evenly distributed, avoiding the sensor body 1 from tilting due to uneven force, and ensuring the perpendicularity of the sensor to the signal detection surface.

[0038] Combination Figure 5 As shown, in this embodiment, the opening groove 21 is adapted to the outer contour of the third cylindrical part 14. The third cylindrical part 14 is provided with a limiting surface 15 for limiting the axial rotation of the sensor body 1. The opening groove 21 effectively prevents the sensor body 1 from rotating axially during vehicle vibration, and avoids damage to the welding point between the contact 11 and the wire harness 4 due to the rotational displacement of the sensor body 1.

[0039] In this embodiment, the sensor body 1 is provided with a sensing end 18, and the side cover 3 is provided with a through groove 33. The sensing end 18 extends outward through the through groove 33. The exposed sensing end 18 effectively avoids affecting the detection accuracy of the Hall chip due to the excessive thickness of the side cover 3, and improves the sensitivity of the sensor.

[0040] In this embodiment, a bushing 7 for installation is provided on one side of the connector 2, and a sealing groove 34 that is misaligned with the first step surface 31 is provided on the outer side of the side cover 3. The bushing 7 is a metal ring embedded in the connector 2 for connecting the engine. The O-ring 8 is installed through the sealing groove 34, thereby improving the sealing effect of the connection surface between the crankshaft position sensor and the engine, preventing foreign objects from entering between the sensing end 18 and the signal teeth, and providing accurate and reliable crankshaft position signals for the engine's central control system.

[0041] Combination Figure 7 As shown, in this embodiment, the contact 11 is provided with a through hole 16 for threading wires and a protrusion 17 for wrapping solder. The protrusion 17 is provided around the through hole 16. When soldering, the copper wire of the wire harness 4 passes through the through hole 16 and is soldered on one side of the protrusion 17. The protrusion 17 forms a groove for accumulating solder, reducing the risk of poor soldering.

[0042] The installation steps of this utility model are as follows: the wire harness 4 is passed through the interface end 23, the opening slot 21 and out of the groove 22 in sequence. After the copper core is soldered to the contact 11, epoxy glue is evenly applied to the inner side of the groove 22 and the outer side of the side cover 3. Then the sensor body 1 is snapped into the opening slot 21 and abutted against the second limiting surface 15 by the washer 6. Part of the wire harness 4 is pulled out from the interface end 23. After leaving an appropriate amount of wire harness 4, the wire harness 4 is snapped and fixed to the interface end 23 by the buckle 5. The side cover 3 is sleeved on the first cylindrical part 12 of the sensor body 1 and abutted against the first limiting surface 15. At this time, the side cover 3 is snapped into the groove 22. After shaping, the assembly of the sensor part is completed.

[0043] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An integrated crankshaft position sensor, comprising: The sensor body (1), the wire holder (2), the side cover (3), the wire harness (4) and the buckle (5) are included, the wire holder (2) is provided with an opening slot (21) for connecting the sensor body (1), and a groove (22) for bonding the side cover (3), and an interface end (23) for connecting the wire harness (4), the sensor body (1) is sleeved between the wire holder (2) and the side cover (3), the sensor body (1) is provided with a contact (11) for signal transmission, the contact (11) extends to the interface end (23) through the opening slot (21), one end of the wire harness (4) is electrically connected to the contact (11) through the interface end (23), and the wire harness (4) is clamped on the interface end (23) by the buckle (5).

2. An integrated crankshaft position sensor as in claim 1, wherein: The sensor body (1) is provided with a first cylindrical part (12), a second cylindrical part (13) and a third cylindrical part (14), the side cover (3) is provided with a first step surface (31) for limiting the first cylindrical part (12), and the side cover (3) is provided with an inner cavity (32) matched with the first cylindrical part (12), the wire holder (2) is provided with a second step surface (24) for limiting the second cylindrical part (13), and the third cylindrical part (14) is clamped in the opening slot (21).

3. An integrated crankshaft position sensor as in claim 2, wherein: The wire holder (2) is provided with a gasket (6) at the second step surface (24), and the second cylindrical part (13) abuts against the wire holder (2) through the gasket (6).

4. An integrated crankshaft position sensor as in claim 2, wherein: The opening slot (21) is matched with the outer contour of the third cylindrical part (14), and the third cylindrical part (14) is provided with a limiting surface (15) for limiting the axial rotation of the sensor body (1).

5. An integrated crankshaft position sensor as in claim 1, wherein: The contact (11) is provided with a through hole (16) for threading, and a protruding part (17) for wrapping solder is arranged around the through hole (16).

6. An integrated crankshaft position sensor as in claim 1, wherein: The sensor body (1) is provided with a sensing end (18), and the side cover (3) is provided with a through slot (33), and the sensing end (18) extends outward through the through slot (33).

7. An integrated crankshaft position sensor as in claim 6, wherein: One side of the wire holder (2) is provided with a bushing (7) for mounting, and the outer side of the side cover (3) is provided with a sealing groove (34) distributed in a staggered manner with the first step surface (31).

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