Electronic engine gear sensor

Abstract

The utility model discloses an electronic engine gear position sensor, including the casing, the inside installation of casing has the pivot, one end of pivot is provided with the installation groove, install the magnet in the installation groove, install the circuit board in the upper of magnet in the casing, the side of circuit board to magnet is provided with hall chip, the axial line of hall chip and magnet is aligned and is arranged. The utility model has the advantages of magnet plus hall chip cooperation reaches the high accuracy.

Description

Technical Field

[0001] This utility model relates to the field of gear position sensors, specifically an electronic engine gear position sensor. Background Technology

[0002] Currently, the gear position sensor of a motorcycle engine cannot use a combination of magnets and Hall effect chips to detect and identify the current angle position of the shift drum, so this needs to be improved. Utility Model Content

[0003] The purpose of this invention is to provide an electronic engine gear position sensor to solve the problems mentioned in the background art, which has the advantage of high accuracy achieved by combining a magnet and a Hall chip.

[0004] To achieve the above objectives, this utility model provides the following technical solution: an electronic engine gear position sensor, including a housing, a rotating shaft installed inside the housing, a mounting groove provided at one end of the rotating shaft, a magnet installed in the mounting groove, a circuit board installed above the magnet inside the housing, a Hall chip provided on the side of the circuit board facing the magnet, and the Hall chip and the axis of the magnet being aligned.

[0005] By adopting the above technical solution, the sensor contains a planar magnetized magnet that rotates synchronously with the engine shift drum of the vehicle. The sensor structure aligns the center point of the magnetic field of the magnet with the detection point of the Hall chip to detect changes in the direction of the magnetic field and thus identify the current angle position of the shift drum. This principle is used to realize the detection of motorcycle gears.

[0006] As a further embodiment of this utility model: the housing is threadedly connected to a mounting plate, and the circuit board is disposed on the upper side of the mounting plate.

[0007] By adopting the above technical solution, the mounting plate is designed to house the circuit board.

[0008] As a further improvement of this invention, an O-ring is provided below the magnet.

[0009] By adopting the above technical solution, the magnet is assembled by flanging and riveting. In order to prevent the magnet from rotating, it must be riveted very tightly. However, the magnet has poor toughness and is easily broken under pressure. Therefore, a small wire diameter O-ring is pre-installed under the magnet. The elasticity of the O-ring can hold the magnet in place and absorb the axial force of riveting, providing a buffer for the magnet and preventing it from cracking.

[0010] As a further improvement of this utility model, the sensor is provided with a pre-drilled hole for a pin.

[0011] By adopting the above technical solution, the rotation radii of the sensors are 7.25 and 8.75 respectively. The radius of the engine shift drum should be equal to this. In addition, the centers of the rotation radii of the two must overlap. Otherwise, jamming will occur because the movement radii of the shift drum and the sensor do not overlap. For this reason, the pin pre-reserved hole on the sensor transmission turntable is elliptical along the radial direction to accommodate the movement trajectory deviation between the pin on the shift drum and the pre-reserved pin hole on the sensor turntable, thus avoiding jamming.

[0012] As a further improvement of this utility model: the housing is integrally connected with a plug rod, and the circuit board is provided with a slot for the plug rod to be inserted.

[0013] By adopting the above technical solution, the insertion rod is inserted into the slot for the connection between the circuit board and the housing.

[0014] As a further embodiment of this utility model: an arc-shaped groove penetrating the upper end of the upper cover is provided, and an arc-shaped plate located within the arc-shaped groove is integrally connected to the shell.

[0015] By adopting the above technical solution, the arc-shaped plate is placed inside the arc-shaped groove, which increases the stability between the two.

[0016] As a further improvement of this utility model: the housing is provided with an annular groove, and an O-ring is provided between the mounting plate and the housing.

[0017] By adopting the above technical solution, the O-ring design increases sealing performance.

[0018] Compared with the prior art, the beneficial effects of this utility model are:

[0019] 1. The sensor contains a planar magnetized magnet that rotates synchronously with the engine shift drum of the vehicle. The sensor structure is designed so that the center point of the magnetic field of the magnet is aligned with the detection point of the Hall chip, thereby detecting changes in the direction of the magnetic field and identifying the current angular position of the shift drum. This principle is used to realize the detection of the motorcycle gear position.

[0020] 2. The rotation radii of the sensors are 7.25mm and 8.75mm respectively. The radius of the engine shift drum should be equal to this. In addition, the centers of the rotation radii of the two sensors must overlap. Otherwise, jamming will occur because the rotation radii of the shift drum and the sensor do not overlap. For this reason, the pin pre-drilled hole on the sensor transmission turntable is elliptical along the radial direction to accommodate the deviation in the movement trajectory of the pin on the shift drum and the pre-drilled pin hole on the sensor turntable, so as to avoid jamming.

[0021] 3. The magnet is assembled by flanging and riveting. To prevent the magnet from rotating, it must be riveted very tightly. However, the magnet is not tough and is easily broken under pressure. Therefore, a small-diameter O-ring is pre-installed under the magnet. The elasticity of the O-ring can hold the magnet in place and absorb the axial force of riveting, providing a buffer for the magnet and preventing it from cracking. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of an embodiment;

[0023] Figure 2 This is a schematic diagram of the structure after removing the top cover in the embodiment;

[0024] Figure 3 This is a schematic diagram of the upper cover structure in the embodiment;

[0025] Figure 4 This is a structural schematic diagram of the upper cover from another perspective in the embodiment;

[0026] Figure 5 This is a front view of an embodiment;

[0027] Figure 6 for Figure 5 A cross-sectional view along the AA direction;

[0028] Figure 7 This is a rear view of an embodiment.

[0029] In the diagram: 1. Housing; 2. Shaft; 3. Mounting slot; 4. Magnet; 5. Circuit board; 6. Hall effect chip; 7. Mounting plate; 8. O-ring; 9. Pin pre-drilled hole; 10. Top cover; 11. Insert rod; 12. Slot; 13. Arc groove; 14. Arc plate; 15. Annular groove. Detailed Implementation

[0030] The technical solutions in the embodiments of this utility model are described clearly and completely below. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0031] In this embodiment of the utility model,

[0032] An electronic engine gear position sensor, such as Figures 1-7 As shown, the device includes a housing 1, a rotating shaft 2 installed inside the housing 1, a mounting groove 3 at one end of the rotating shaft 2, a magnet 4 installed in the mounting groove 3, a circuit board 5 installed above the magnet 4 inside the housing 1, a Hall chip 6 arranged on the side of the circuit board 5 facing the magnet 4, and the center lines of the Hall chip 6 and the magnet 4 are aligned.

[0033] The housing 1 is threadedly connected to the mounting plate 7, and the circuit board 5 is disposed on the upper side of the mounting plate 7.

[0034] An O-ring 8 is provided below the magnet 4.

[0035] The sensor is provided with a pin pre-drilled hole 9.

[0036] The housing 1 is integrally connected with a plug rod 11, and the circuit board 5 is provided with a slot 12 for the plug rod 11 to be inserted.

[0037] An arc-shaped groove 13 penetrating the upper end of the upper cover 10 is provided, and an arc-shaped plate 14 located within the arc-shaped groove 13 is integrally connected to the housing 1.

[0038] The housing 1 is provided with an annular groove 15, and an O-ring is provided between the mounting plate 7 and the housing 1.

[0039] Working principle:

[0040] 1. The sensor contains a planar magnet 4, which rotates synchronously with the shaft 2 of the vehicle. The sensor structure is designed so that the center point of the magnetic field of the magnet 4 is aligned with the detection point of the Hall chip 6, thereby detecting the change in the direction of the magnetic field and identifying the current angle position of the shift drum. This principle is used to realize the detection of the motorcycle gear position.

[0041] 2. The rotation radii of the sensors are 7.25mm and 8.75mm respectively. The radius of the engine shift drum should be equal to this. In addition, the centers of the rotation radii of the two sensors must overlap. Otherwise, jamming will occur because the rotation radii of the shift drum and the sensor do not overlap. For this reason, the pin pre-drilled hole 9 on the sensor transmission turntable is elliptical along the radial direction to accommodate the deviation in the movement trajectory of the pin on the shift drum and the pre-drilled pin hole on the sensor turntable, so as to avoid jamming.

[0042] 3. Magnet 4 is assembled by flanging and riveting. In order to prevent magnet 4 from rotating, it must be riveted very tightly. However, magnet 4 has poor toughness and is easily broken under pressure. Therefore, a small-diameter O-ring 8 is pre-installed under magnet 4. The elasticity of O-ring 8 can hold magnet 4 in place and absorb the axial force of riveting, providing a buffer for magnet 4 and preventing magnet 4 from cracking.

[0043] 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. An electronic engine gear position sensor, comprising a housing (1), characterized in that: A rotating shaft (2) is installed inside the housing (1). One end of the rotating shaft (2) is provided with a mounting groove (3). A magnet (4) is installed in the mounting groove (3). A circuit board (5) is installed inside the housing (1) above the magnet (4). A Hall chip (6) is provided on the side of the circuit board (5) facing the magnet (4). The Hall chip (6) and the axis of the magnet (4) are aligned.

2. The electronic engine gear position sensor according to claim 1, characterized in that: The housing (1) is threadedly connected to a mounting plate (7), and the circuit board (5) is disposed on the upper side of the mounting plate (7).

3. The electronic engine gear position sensor according to claim 1, characterized in that: An O-ring (8) is provided below the magnet (4).

4. The electronic engine gear position sensor according to claim 1, characterized in that: The sensor is provided with a pin pre-drilled hole (9).

5. The electronic engine gear position sensor according to claim 1, characterized in that: The housing (1) is integrally connected with a plug rod (11), and the circuit board (5) is provided with a slot (12) for the plug rod (11) to be inserted.

6. The electronic engine gear position sensor according to claim 5, characterized in that: An arc-shaped groove (13) penetrating the upper end of the cover (10) is provided, and the shell (1) is integrally connected to an arc-shaped plate (14) located in the arc-shaped groove (13).

7. The electronic engine gear position sensor according to claim 2, characterized in that: The housing (1) is provided with an annular groove (15), and an O-ring is provided between the mounting plate (7) and the housing (1).

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