Crankshaft position sensor with good waterproof effect

Abstract

The utility model relates to the technical field of crankshaft position sensors, in particular to a crankshaft position sensor with a good waterproof effect, which comprises an inner shell and resin, the inner wall of the inner shell is fixedly connected with the resin, the inner wall of the resin is movably connected with a coil, the inner wall of the coil is electrically connected with a circuit, and the inner wall of the coil is electrically connected with a permanent magnet. And the outer wall of the inner shell is connected with a dismounting mechanism. After the inner shell is screwed into the connecting frames in a threaded mode for position fixing, the front shell and the tail shell are screwed into the upper connecting frame and the lower connecting frame, the front shell and the tail shell are assembled in a sealed mode through rubber rings in the connecting frames, and a certain buffering distance exists between the inner shell and the tail shell and between the inner shell and the front shell through connection between the inner shell and the connecting frames. Direct contact between the interior of the inner shell and external force is avoided, and the service life is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of crankshaft position sensor field, specifically to a kind of waterproof effect good crankshaft position sensor. BACKGROUND

[0002] Crankshaft Position Sensor (CKPS or CKP) is also called engine speed sensor. The function of crankshaft position sensor is to collect the position signal of valve train crankshaft and input ECU, so that ECU can identify cylinder compression top dead center, and then carry out sequential injection control, ignition timing control and explosion control.

[0003] For example, a kind of crankshaft position sensing device with the authorization announcement number "CN203615955U", although it solves the problem that the existing crankshaft position sensing device is prone to gap between iron core and shell due to temperature impact during use, which reduces the waterproof performance of the sensor. The above is integrally formed by injection molding process, and the iron

[0004] Core is completely located in the shell, even if gap is generated between iron core and shell during use, water vapor cannot enter the shell interior. Considering that the existing crankshaft position sensing device only performs injection molding process to prevent water vapor from entering, the thickness of the shell is fixed, which makes the external shell have low internal protection effect, and the internal structure is easily affected by external impact, which leads to internal damage and shortens the service life. UTILITY MODEL CONTENT

[0005] The utility model aims at solving the problem of internal damage and short service life of the existing crankshaft position sensing device, and provides a kind of crankshaft position sensor with good waterproof effect.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a kind of crankshaft position sensor with good waterproof effect, including inner shell and resin, the inner wall of the inner shell is fixedly connected with resin, the inner wall of the resin is movably connected with coil, the inner wall of the coil is electrically connected with circuit, the inner wall of the coil is electrically connected with permanent magnet, and the outer wall of the inner shell is connected with dismounting mechanism.

[0007] Preferably, the dismounting mechanism includes tail shell, the inner wall of the tail shell is threadedly connected with inner shell, the outer wall of the tail shell is threadedly connected with connecting frame, the inner wall of the connecting frame is processed with fixed hole, the upper end of the connecting frame is threadedly connected with front shell, and the inner wall of the connecting frame is movably connected with rubber ring.

[0008] Preferably, the outer wall of the tail shell is fixedly connected with rubber block, the inner wall of the rubber block is fixedly connected with circuit, and the inner wall of the front shell is connected with limiting mechanism.

[0009] Preferably, the limiting mechanism comprises a limiting strip, an outer wall of the limiting strip is fixedly connected with the front shell, the outer wall of the limiting strip is movably connected with the fixing cylinder, and the inner wall of the fixing cylinder is provided with the enameled wire.

[0010] Preferably, the inner wall of the tail shell is fixedly connected with the supporting block, and the end of the supporting block abuts against the permanent magnet.

[0011] Preferably, the inner wall of the front shell is movably connected with the fixing cylinder, and the output end of the enameled wire is electrically connected with the circuit.

[0012] The crankshaft position sensor with good waterproof effect has the beneficial effects that: after the inner shell is screwed into the connecting frame for position fixation, the front shell and the tail shell are screwed into the interiors of the upper and lower connecting frames, the rubber ring in the connecting frame seals and assembles the front shell and the tail shell, a certain buffer distance exists between the inner shell and the tail shell and the front shell through connection between the inner shell and the connecting frame, direct contact between the inner shell and external force is avoided, and service life is improved. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is a structural schematic view of the utility model;

[0014] Figure 2 It is Figure 1 It is a middle front view sectional structure schematic view;

[0015] Figure 3 It is Figure 1 It is a middle top view sectional structure schematic view;

[0016] Figure 4 It is Figure 2 It is an enlarged structure schematic view of A in the middle;

[0017] Figure 5 It is Figure 2 It is an enlarged structure schematic view of B in the middle;

[0018] Figure 6 It is Figure 2 It is an enlarged structure schematic view of C in the middle.

[0019] In the drawing: 1, inner shell, 2, resin, 3, coil, 4, circuit, 5, permanent magnet, 6, dismounting mechanism, 601, tail shell, 602, connecting frame, 603, fixing hole, 604, front shell, 605, rubber ring, 7, rubber block, 8, limiting mechanism, 801, limiting strip, 802, fixing cylinder, 803, enameled wire, 9, supporting block, 10, iron core. DETAILED DESCRIPTION

[0020] The utility model will be further described in connection with the drawings: Example 1

[0021] Please refer to Figures 1-6 : the embodiment, a good waterproof effect of crankshaft position sensor, including the inner shell 1 and resin 2, the inner wall of the inner shell 1 and resin 2 fixedly connected, the inner wall of the resin 2 and coil 3 movably connected, the inner wall of the coil 3 and line 4 electrically connected, the inner wall of the coil 3 and permanent magnet 5 electrically connected, the outer wall of the inner shell 1 is connected with the dismounting mechanism 6.

[0022] Dismounting mechanism 6 includes tail shell 601, by controlling the front shell 604 and tail shell 601 in the connecting frame 602 screw rotation, can be dismounted and installed from the connecting frame 602, the inner wall of the tail shell 601 and the inner shell 1 screw connection, the outer wall of the tail shell 601 and the connecting frame 602 screw connection, the inner wall of the connecting frame 602 is processed with fixed hole 603, the upper end of the connecting frame 602 and the front shell 604 screw connection, the inner wall of the connecting frame 602 and rubber ring 605 movably connected;

[0023] The inner shell 1 is screwed into the connecting frame 602 to fix the position, then the front shell 604 and tail shell 601 are screwed into the inside of the connecting frame 602, the rubber ring 605 in the connecting frame 602 seals the assembly of the front shell 604 and tail shell 601, and the inner shell 1 is connected between the connecting frame 602, so that there is a certain buffer distance between the inner shell 1 and the tail shell 601 and the front shell 604, avoiding direct contact between the inner shell 1 and the external force, improving the service life.

[0024] The outer wall of the tail shell 601 and the rubber block 7 are fixedly connected, the inner wall of the rubber block 7 and the line 4 are fixedly connected, the inner wall of the front shell 604 is connected with the limiting mechanism 8, the limiting mechanism 8 includes limiting strip 801, the fixed cylinder 802 is put into the limiting strip 801, so that the fixed cylinder 802 is limited in the movable state of the front shell 604, the outer wall of the limiting strip 801 and the front shell 604 are fixedly connected, the outer wall of the limiting strip 801 and the fixed cylinder 802 are movably connected, the inner wall of the fixed cylinder 802 is provided with enameled wire 803.

[0025] The inner wall of the tail shell 601 and the support block 9 are fixedly connected, the end of the support block 9 abuts against the permanent magnet 5, the inner wall of the front shell 604 and the fixed cylinder 802 movably connected, the output end of the enameled wire 803 and the line 4 are electrically connected, the upper end of the permanent magnet 5 and the iron core 10 movably connected.

[0026] Working principle:

[0027] By winding the coil 3 on the permanent magnet 5, the coil 3 and the circuit 4 are electrically welded, and the end of the circuit 4 and the enameled wire 803 are electrically welded, the permanent magnet 5 is put into the inner shell 1 into the resin 2, the resin 2 will wrap the permanent magnet 5 and the coil 3 for protection, the inner shell 1 is screwed into the connecting frame 602 to fix the position, continue to screw the front shell 604 and the tail shell 601 into the inside of the upper and lower connecting frame 602, at the same time, the fixing cylinder 802 is placed on the limiting strip 801 made of rubber material, to ensure the stability of the fixing cylinder 802 on the front shell 604, the rubber ring 605 inside the connecting frame 602 seals the front shell 604 and the tail shell 601, which plays a first layer of waterproofness, and the end of the inner shell 1 will be tightly pressed against the inner wall of the front shell 604, which can reseal the front shell 604 and the connecting frame 602, playing a second layer of waterproofness, and the resin 2 wraps the permanent magnet 5 and the coil 3 for a third layer of waterproofness, the outer wall of the circuit 4 is fixed and sealed with the rubber block 7, to avoid the gap between the circuit 4 and the tail shell 601, to achieve the overall waterproof effect, when the vehicle engine rotates, the coil 3 is powered to magnetize the permanent magnet 5, so that the crankshaft position sensor can read the magnetic field change between the toothed unit of the vehicle and the magnetization of the permanent magnet 5, then through the amplitude variation, output an electric pulse signal received by the ECU, to achieve the effect of using the crankshaft position sensor to work.

[0028] Although the embodiments of the present application have been shown and described, it should be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A crankshaft position sensor with good waterproof performance, comprising an inner shell (1) and resin (2), wherein the inner wall of the inner shell (1) is fixedly connected to the resin (2), characterized in that: The inner wall of the resin (2) is movably connected with the coil (3), the inner wall of the coil (3) is electrically connected with the circuit (4), the inner wall of the coil (3) is electrically connected with the permanent magnet (5), and the outer wall of the inner shell (1) is connected with the dismounting mechanism (6).

2. The crankshaft position sensor with good waterproof effect according to claim 1, characterized in that: The dismounting mechanism (6) comprises a tail shell (601), the inner wall of the tail shell (601) is threadedly connected with the inner shell (1), the outer wall of the tail shell (601) is threadedly connected with a connecting frame (602), the inner wall of the connecting frame (602) is processed with a fixing hole (603), the upper end of the connecting frame (602) is threadedly connected with a front shell (604), and the inner wall of the connecting frame (602) is movably connected with a rubber ring (605).

3. The crankshaft position sensor with good waterproof effect according to claim 2, characterized in that: The outer wall of the tail shell (601) is fixedly connected with a rubber block (7), the inner wall of the rubber block (7) is fixedly connected with the circuit (4), and the inner wall of the front shell (604) is connected with a limiting mechanism (8).

4. The crankshaft position sensor with good waterproof effect according to claim 3, characterized in that: The limiting mechanism (8) comprises a limiting strip (801), the outer wall of the limiting strip (801) is fixedly connected with the front shell (604), the outer wall of the limiting strip (801) is movably connected with a fixing cylinder (802), and the inner wall of the fixing cylinder (802) is mounted with an enameled wire (803).

5. The crankshaft position sensor of claim 2, wherein: The inner wall of the tail shell (601) is fixedly connected with a supporting block (9), and the end of the supporting block (9) abuts against the permanent magnet (5).

6. The crankshaft position sensor with good waterproof effect according to claim 4, characterized in that: The inner wall of the front shell (604) is movably connected with the fixing cylinder (802), the output end of the enameled wire (803) is electrically connected with the circuit (4), and the upper end of the permanent magnet (5) is movably connected with an iron core (10).

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