Crankshaft position sensor with hall chip detection function

Abstract

The utility model relates to the technical field of crankshaft position sensor, especially is with the hall chip detection function's crankshaft position sensor, including the shell and the first wiring terminal of setting at the upper end of shell, the loading cavity inner wall is connected with the loading cover, the first inner hexagonal groove both sides inner wall all are equipped with the threaded hole, two the threaded hole inner wall all are connected with the stud screw thread, the inside of guiding chamber is connected with the framework through the abutting device, the circuit board of the utility model is connected with the framework through the connecting device and will not be loaded cover touches, under the connection effect of first lead column, second lead column and connecting block, make the circuit board and the framework all be in the electric connection state, through the screwing stud screw, make the stud screw one end abut the loading cavity inner wall, avoided the appearance slight rotation of loading cover, guarantee not to influence the inductive accuracy of hall chip.

Description

Technical Field

[0001] This utility model relates to the field of crankshaft position sensor technology, and in particular to a crankshaft position sensor with Hall chip detection function. Background Technology

[0002] Hall effect crankshaft position sensors, typically installed within the distributor, are among the most important sensors in the control system. Their functions include: detecting engine speed (hence also called a speed sensor); and detecting the piston's top dead center (TDC) position (hence also called a TDC sensor), including detecting the TDC signals of each cylinder used to control ignition and the TDC signal of the first cylinder used to control sequential fuel injection. It utilizes trigger vanes or gear teeth to change the magnetic field strength passing through the Hall chip, causing the Hall chip to generate a pulsed Hall voltage signal. This signal, after amplification and shaping, becomes the output signal of the crankshaft position sensor. The Hall effect crankshaft position sensor is installed at the front end of the crankshaft, employing a trigger vane structure. Two signal wheels with trigger vanes, one inner and one outer, are fixed at the front end of the engine's crankshaft pulley and rotate with the crankshaft. During installation, the Hall effect crankshaft position sensor is generally inserted into the engine...

[0003] On the housing, its sensing end is close to the signal wheel, and the Hall chip at the end of the Hall crankshaft position sensor needs to be extended from the mounting hole.

[0004] For example, the authorized announcement number "CN218566541U" is named Hall crankshaft position sensor. When the length of the mounting hole is too long, the Hall chip loading cover is rotated to move and adjust the position of the Hall chip. This ensures the magnetic field output strength of the magnet and the sensing accuracy of the Hall chip, thereby improving the detection accuracy.

[0005] The above-mentioned and existing technologies have the following defects: the connecting wires between the circuit board and the frame of the sensor are easily damaged by the loading cover, affecting the electrical connection between the circuit board and the frame; the loading cover does not have anti-rotation measures, and is prone to slight rotation, which in turn affects the sensing accuracy of the Hall chip. Utility Model Content

[0006] The purpose of this invention is to address the shortcomings of existing technologies by proposing a crankshaft position sensor with Hall chip detection function.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] Design a crankshaft position sensor with Hall effect chip detection function, including a housing and a first terminal block located on the upper end of the housing. A loading cavity is formed on the lower surface of the housing, and a loading cover is threadedly connected to the inner wall of the loading cavity. A first internal hexagonal groove is formed on the lower surface of the loading cover, and threaded through holes are formed on both sides of the inner wall of the first internal hexagonal groove. Studs are threadedly connected to the inner walls of both threaded through holes. A mating groove is formed on the upper surface of the loading cover, and a Hall effect chip is placed on the lower inner wall of the mating groove. A guide seat is provided on the upper inner wall of the loading cavity, and a guide cavity is formed on the lower surface of the guide seat. A frame is connected to the guide cavity through a clamping device. A magnet is provided at the lower end of the frame to contact the surface of the Hall effect chip. A second terminal block electrically connected to the first terminal block is provided on the upper inner wall of the loading cavity, and a circuit board is provided at the lower end of the second terminal block. A force-bearing seat is provided between the circuit board and one side inner wall of the loading cavity. The circuit board and the frame are electrically connected through a connecting device.

[0009] Preferably, the connecting device includes a first guide post, a second guide post, a connecting block, and a first spring. The first guide post is electrically connected to one side surface of the circuit board, and the second guide post is slidably connected to the first guide post. One end of the second guide post is provided with a connecting block that contacts the surface of the skeleton, and the first spring is provided between the connecting block and the circuit board.

[0010] Preferably, each of the two studs has a second internal hexagonal groove on one of its facing surfaces.

[0011] Preferably, wear-resistant blocks are provided on the opposite sides of the two studs, and the wear-resistant blocks are made of polyvinyl chloride.

[0012] Preferably, the clamping device includes a second spring, a support seat, and a support column. One end of the second spring is fixedly connected to the guide cavity, and the other end of the second spring is fixedly connected to the support seat. One side surface of the support seat is fixedly connected to the support column, and one end of the support column slides through the guide cavity and is fixedly connected to the frame.

[0013] Preferably, the skeleton is a cylinder, and the side of the connecting block that contacts the skeleton is arc-shaped.

[0014] The crankshaft position sensor with Hall chip detection function proposed in this utility model has the following advantages: the circuit board of this sensor is connected to the frame through a connecting device and will not be touched by the loading cover. Under the connection of the first guide post, the second guide post and the connecting block, the circuit board and the frame are always in an electrically connected state; by turning the stud, one end of the stud is pressed against the inner wall of the loading cavity, which avoids slight rotation of the loading cover and ensures that the sensing accuracy of the Hall chip is not affected. Attached Figure Description

[0015] Figure 1 This is a cross-sectional structural diagram of the present invention;

[0016] Figure 2 This is an enlarged view of position A in this utility model;

[0017] Figure 3 This is an enlarged view of position B in this utility model;

[0018] Figure 4 This is a schematic diagram of the connecting block structure of this utility model.

[0019] In the diagram: 1. Outer shell; 2. First terminal block; 3. Loading cavity; 4. Loading cover; 5. First hexagonal socket; 6. Mating groove; 7. Hall effect chip; 8. Guide seat; 9. Guide cavity; 10. Frame; 11. Magnet; 12. Second terminal block; 13. Force-bearing seat; 14. First guide post; 15. Second guide post; 16. Connecting block; 17. First spring; 18. Threaded through hole; 19. Stud; 20. Second hexagonal socket; 21. Wear-resistant block; 22. Second spring; 23. Support seat; 24. Support column; 25. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0021] Reference Figure 1-4 A crankshaft position sensor with Hall chip detection function includes a housing 1 and a first terminal block 2 located on the upper end of the housing 1. A loading cavity 3 is formed on the lower surface of the housing 1. A loading cover 4 is threadedly connected to the inner wall of the loading cavity 3. A first internal hexagonal groove 5 is formed on the lower surface of the loading cover 4. Threaded through holes 19 are formed on both sides of the inner wall of the first internal hexagonal groove 5. Studs 20 are threadedly connected to the inner walls of the two threaded through holes 19. A mating groove 6 is formed on the upper surface of the loading cover 4. A Hall chip 7 is located on the lower inner wall of the mating groove 6. A guide seat 8 is provided on the upper inner wall of the loading cavity 3. A guide cavity 9 is formed on the lower surface of the guide seat 8. A frame 10 is connected to the guide cavity 9 through a clamping device. A magnet 11 is provided at the lower end of the frame 10, which is in contact with the surface of the Hall chip 7. A second terminal block 12 is provided on the upper inner wall of the loading cavity 3, which is electrically connected to the first terminal block 2. A circuit board 13 is provided at the lower end of the second terminal block 12. A force-bearing seat 14 is provided between the circuit board 13 and one side inner wall of the loading cavity 3. The circuit board 13 and the frame 10 are electrically connected through a connecting device. The circuit board 13 is electrically connected to the outside through the first terminal 2.

[0022] The connecting device includes a first guide post 15, a second guide post 16, a connecting block 17, and a first spring 18. The first guide post 15 is electrically connected to one side surface of the circuit board 13. The second guide post 16 is slidably connected to the first guide post 15. One end of the second guide post 16 is provided with a connecting block 17 that contacts the surface of the frame 10. The first spring 18 is provided between the connecting block 17 and the circuit board 13.

[0023] Both studs 20 have a second internal hexagonal groove 21 on their opposite sides. This allows for easy tightening using a dedicated internal hexagonal wrench inserted into the second internal hexagonal groove 21.

[0024] Wear-resistant blocks 22, made of polyvinyl chloride, are provided on the opposite surfaces of the two studs 20. The wear-resistant blocks 22 increase the wear resistance of the studs 20.

[0025] The clamping device includes a second spring 23, a support 24, and a support column 25. One end of the second spring 23 is fixedly connected to the guide cavity 9, and the other end of the second spring 23 is fixedly connected to the support 24. One side surface of the support 24 is fixedly connected to the support column 25, and one end of the support column 25 slides through the guide cavity 9 and is fixedly connected to the frame 10.

[0026] The frame 10 is cylindrical, and the side of the connecting block 17 that contacts the frame 10 is curved. This design increases the contact area between the connecting block 17 and the frame 10.

[0027] Working principle: When the length of the mounting hole is too long, the loading cover 4 is rotated to move and adjust the position of the Hall chip 7. By adjusting, the loading cover 4 for mounting the Hall chip 7 can extend out of the mounting hole, achieving the technical effect of retractable and fine-tunable position of the Hall chip 7. By screwing the stud 20, one end of the stud 20 is pressed against the inner wall of the loading cavity 3. Through the pressing device, the second spring 23 pushes the support seat 24, thereby ensuring that the magnet 11 mounted on the frame 10 is still in contact with the Hall chip 7, while ensuring the tight fit between the components. This ensures the magnetic field output strength of the magnet 11 and the sensing accuracy of the Hall chip 7, thereby improving the detection accuracy. At the same time, through the connecting device, the elastic action of the first spring 18 will keep the connecting block 17 in contact with the frame 10, ensuring that the circuit board 13 and the frame 10 are electrically connected.

[0028] In summary, the circuit board 13 of this sensor is connected to the frame 10 through a connecting device and will not be touched by the loading cover 4. Under the connection of the first guide post 15, the second guide post 16 and the connecting block 17, the circuit board 13 and the frame 10 are always electrically connected. By turning the stud 20, one end of the stud 20 is pressed against the inner wall of the loading cavity 3, which prevents the loading cover 4 from rotating slightly and ensures that the sensing accuracy of the Hall chip 7 is not affected.

[0029] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A crankshaft position sensor with Hall effect chip detection function, comprising a housing (1) and a first terminal block (2) disposed on the upper end of the housing (1), characterized in that, The lower surface of the outer shell (1) is provided with a loading cavity (3), and the inner wall of the loading cavity (3) is threaded with a loading cover (4). The lower surface of the loading cover (4) is provided with a first internal hexagonal groove (5), and the inner walls on both sides of the first internal hexagonal groove (5) are provided with threaded through holes (19). The inner walls of the two threaded through holes (19) are threaded with studs (20). The upper surface of the loading cover (4) is provided with a mating groove (6), and the lower inner wall of the mating groove (6) is provided with a Hall chip (7). The upper inner wall of the loading cavity (3) is provided with a guide seat (8), and the lower surface of the guide seat (8) is provided with a guide seat (8). A guide cavity (9) is provided on the surface. A frame (10) is connected inside the guide cavity (9) through a clamping device. A magnet (11) is provided at the lower end of the frame (10) to contact the surface of the Hall chip (7). A second terminal (12) is provided on the upper inner wall of the loading cavity (3) and is electrically connected to the first terminal (2). A circuit board (13) is provided at the lower end of the second terminal (12). A force-bearing seat (14) is provided between the circuit board (13) and the inner wall of one side of the loading cavity (3). The circuit board (13) and the frame (10) are electrically connected through a connecting device.

2. The crankshaft position sensor with Hall chip detection function according to claim 1, characterized in that, The connecting device includes a first guide post (15), a second guide post (16), a connecting block (17), and a first spring (18). The first guide post (15) is electrically connected to one side surface of the circuit board (13). The second guide post (16) is slidably connected to the first guide post (15). One end of the second guide post (16) is provided with a connecting block (17) that contacts the surface of the skeleton (10). The first spring (18) is provided between the connecting block (17) and the circuit board (13).

3. The crankshaft position sensor with Hall chip detection function according to claim 1, characterized in that, The two studs (20) are provided with a second internal hexagonal groove (21) on the opposite side surface.

4. The crankshaft position sensor with Hall chip detection function according to claim 1, characterized in that, The two studs (20) are provided with wear-resistant blocks (22) on opposite sides of their surfaces. The wear-resistant blocks (22) are made of polyvinyl chloride.

5. The crankshaft position sensor with Hall chip detection function according to claim 1, characterized in that, The clamping device includes a second spring (23), a support (24) and a support column (25). One end of the second spring (23) is fixedly connected to the guide cavity (9), and the other end of the second spring (23) is fixedly connected to the support (24). One side surface of the support (24) is fixedly connected to the support column (25), and one end of the support column (25) slides through the guide cavity (9) and is fixedly connected to the frame (10).

6. The crankshaft position sensor with Hall chip detection function according to claim 2, characterized in that, The skeleton (10) is a cylinder, and the side of the connecting block (17) that contacts the skeleton (10) is arc-shaped.

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