Gearbox gear ring position sensor

Abstract

The utility model discloses a position sensor for a gear ring of a gearbox. The position sensor comprises a sensor shell (1), a Hall element circuit (4), an aviation plug (3) and a magnet (2), the Hall element circuit (4) is embedded in the sensor shell (1), a lead of the Hall element circuit (4) is connected to the aviation plug (3), the magnet (2) is located outside the sensor shell (1) and assembled in a gear ring of a gearbox, and sensor signal output is changed through change of the position relation between the magnet (2) and a Hall element in the Hall element circuit (4). By means of the sensor, a control system of the vehicle can monitor the running state of the vehicle in real time and correspondingly adjust the working state of a gearbox so as to ensure that the vehicle can run stably and efficiently. The sensor plays a crucial role in an automatic gearbox system, and the driving performance and safety of a vehicle are improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of sensors and relates to a gear ring position sensor for a transmission case. Background Art

[0002] Currently, special-purpose vehicles lack transmission ring gear position sensors for forward and reverse operation. As a result, the vehicle's control system cannot accurately monitor the ring gear position, making it impossible to determine whether the vehicle is in forward or reverse. This can lead to drivers being unable to accurately control the vehicle, increasing driving risks.

[0003] Based on the above situation, this utility model independently designs a low-cost, cost-effective, stable and reliable transmission ring gear position sensor. The sensor is fixed to the transmission ring gear and has two built-in Hall elements. Magnets are installed on the gears inside the transmission. When the transmission reversing clutch is in the forward gear position, one sensor signal is connected. When the transmission reversing clutch is in the reverse gear position, the other sensor signal is connected. The connection and disconnection of the two sensor signals indicate whether the vehicle is in the forward or reverse operating state.

[0004] This sensor allows the vehicle's control system to monitor the vehicle's driving status in real time and adjust the transmission's operating state accordingly to ensure smooth and efficient driving. This sensor plays a vital role in automatic transmission systems, improving vehicle driving performance and safety.

[0005] The gearboxes of existing special vehicles do not have a ring gear position sensor and no operating status feedback function. However, with the development of technology, vehicle forward / reverse operating status feedback has become a new trend. Providing the driver with the vehicle information required for driving can improve the vehicle's driving performance and safety. Utility Model Content

[0006] (1) Purpose of the utility model

[0007] The purpose of the utility model is to provide a gearbox ring gear position sensor to solve the problems of vehicle forward / reverse working condition feedback, the vehicle control system being unable to monitor the vehicle's driving status in real time, and the gearbox's working state being unable to be adjusted according to the vehicle's driving status.

[0008] (2) Technical solution

[0009] In order to solve the above technical problems, the utility model provides a transmission ring gear position sensor, which includes: a sensor housing 1, a Hall element circuit 4, an air plug 3, and a magnet 2; the Hall element circuit 4 is embedded in the sensor housing 1, the Hall element circuit 4 is connected to the air plug 3, the magnet 2 is located outside the sensor housing 1 and assembled inside the transmission ring gear, and the sensor signal output is changed by changing the position relationship between the magnet 2 and the Hall element in the Hall element circuit 4.

[0010] The sensor housing 1 and the Hall element circuit 4 are fixed using epoxy resin glue.

[0011] The sensor housing 1 is provided with a fixing hole, and the sensor is fixed to the inner gear ring of the special vehicle gearbox through the fixing hole.

[0012] Among them, the aviation plug 3 adopts the connector PCM4KWFTB.

[0013] Among them, the Hall element circuit includes Hall element U1 and Hall element U2, and resistors R1, R2, and R3 are connected in parallel between the VCC end and the output end of the Hall element U1. The VCC end of the Hall element U1 is connected to the power supply pin 1 of the connector PCM4KWFTB, and the capacitor C1 is connected in parallel between the VCC end and the GND end of the Hall element U1 for filtering. The GND end of the Hall element U1 is connected to the ground pin 4 of the connector PCM4KWFTB; resistors R4, R5, and R6 are connected in parallel between the VCC end and the output end of the Hall element U2, and the VCC end of the Hall element U2 is connected to the signal pin 2 of the connector PCM4KWFTB. Capacitor C2 is connected in parallel between the VCC end and the GND end of the Hall element U2 for filtering, and the GND end of the Hall element U2 is connected to the ground pin 4 of the connector PCM4KWFTB.

[0014] The Hall element circuit adopts the vehicle-mounted DC 24V voltage distribution, and the Hall element U1 、 The Hall element U2 uses the highly sensitive Hall effect switch AH3362Q.

[0015] The resistors R1, R2, R4, and R5 are 10KΩ resistors, the resistors R3 and R6 are 2.2KΩ resistors, and the capacitors C1 and C2 are 0.1uF / 50V capacitors.

[0016] Among them, the power supply pin 1 and the signal pin 2 of the connector PCM4KWFTB are connected to the positive pole of the DC 24V voltage, and the ground pin 4 of the connector PCM4KWFTB is connected to the negative pole of the DC 24V voltage.

[0017] (3) Beneficial effects

[0018] The transmission ring gear position sensor provided by the aforementioned technical solution uses a Hall effect element to sense changes in the ring gear's magnetic field, thereby determining its position. When the vehicle is moving forward or backward, the ring gear's position changes, and the sensor detects these changes and outputs a corresponding signal. This sensor enables the vehicle's control system to monitor the vehicle's driving status in real time and adjust the transmission's operating state accordingly, ensuring smooth and efficient driving. This sensor plays a crucial role in automatic transmission systems, improving vehicle drivability and safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is the front view of the gearbox ring gear position sensor of the utility model.

[0020] Figure 2 This is a schematic diagram of the internal structure of the gearbox ring gear position sensor of the present utility model.

[0021] Figure 3 for Figure 1 Bottom view of .

[0022] Figure 4 This is the circuit principle diagram of the gearbox ring gear position sensor of this utility model. DETAILED DESCRIPTION

[0023] In order to make the purpose, content and advantages of the present invention more clear, the specific implementation methods of the present invention are further described in detail below with reference to the accompanying drawings and embodiments.

[0024] like Figures 1 to 3 As shown, the gearbox ring gear position sensor of this embodiment includes: a sensor housing 1, a Hall element circuit 4, an air plug 3, and a magnet 2; the Hall element circuit 4 is embedded in the sensor housing 1, and the Hall element circuit 4 is connected to the air plug 3. The magnet 2 is located outside the sensor housing 1 and assembled inside the gearbox ring gear. The sensor signal output is changed by changing the positional relationship between the magnet 2 and the Hall element in the Hall element circuit 4.

[0025] The sensor housing 1 and the Hall element circuit 4 are fixed with epoxy resin glue.

[0026] A fixing hole is provided on the sensor housing 1, through which the sensor is fixed to the inner gear ring of the special vehicle gearbox, and the power supply and signal are connected to the interface inside the vehicle through a connector.

[0027] Through the sensor of this embodiment, the vehicle's control system can monitor the vehicle's driving status in real time and adjust the working status of the transmission accordingly to ensure smooth and efficient driving of the vehicle, further improving the vehicle's driving performance and safety.

[0028] The Aviator Plug 3 uses the connector PCM4KWFTB.

[0029] like Figure 4 As shown, the Hall element circuit includes a Hall element U1 and a Hall element U2. Resistors R1, R2, and R3 are connected in parallel between the VCC terminal and the output terminal of the Hall element U1. The VCC terminal of the Hall element U1 is connected to the power supply pin 1 of the connector PCM4KWFTB. A capacitor C1 is connected in parallel between the VCC terminal and the GND terminal of the Hall element U1 for filtering. The GND terminal of the Hall element U1 is connected to the ground pin 4 of the connector PCM4KWFTB. Resistors R4, R5, and R6 are connected in parallel between the VCC terminal and the output terminal of the Hall element U2. The VCC terminal of the Hall element U2 is connected to the signal pin 2 of the connector PCM4KWFTB. A capacitor C2 is connected in parallel between the VCC terminal and the GND terminal of the Hall element U2 for filtering. The GND terminal of the Hall element U2 is connected to the ground pin 4 of the connector PCM4KWFTB.

[0030] The Hall element circuit uses the on-board DC 24V voltage distribution, and the Hall element U1 、 The Hall element U2 uses the highly sensitive Hall effect switch AH3362Q.

[0031] The sensor senses the change in the magnetic field of the ring gear through the Hall element U1 and the Hall element U2 in the Hall element circuit, thereby determining the position of the ring gear and thus determining whether the vehicle is in the forward / reverse working state.

[0032] Among them, the resistors R1, R2, R4, and R5 are 10KΩ resistors, the resistors R3 and R6 are 2.2KΩ resistors, and the capacitors C1 and C2 are 0.1uF / 50V capacitors.

[0033] Connect the power supply pin 1 and signal pin 2 of the PCM4KWFTB connector to the positive terminal of a 24V DC voltage, and connect the ground pin 4 of the PCM4KWFTB connector to the negative terminal of a 24V DC voltage. When Hall element U1 approaches magnet 2, the current flowing through power supply pin 1 of the PCM4KWFTB connector increases. When Hall element U1 moves away from magnet 2, the current flowing through power supply pin 1 of the PCM4KWFTB connector decreases. Similarly, when Hall element U2 approaches magnet 2, the current flowing through signal pin 2 of the PCM4KWFTB connector increases. When Hall element U1 moves away from magnet 2, the current flowing through signal pin 2 of the PCM4KWFTB connector decreases. By monitoring the currents of power supply pin 1 and signal pin 2 of the PCM4KWFTB connector, the position of the transmission ring gear can be determined based on the current changes, thereby determining the vehicle's forward / reverse operating state. The vehicle's control system can monitor the vehicle's driving status in real time.

[0034] The application of the sensor in this embodiment is implemented as follows:

[0035] 1. Turn on the vehicle power switch. The vehicle power supply system is DC24V.

[0036] 2. When the vehicle is in the forward working condition, the signal current of the sensor increases. After conversion, the signal is sent to the transmission control system. After the system analyzes the signal, it lights up the forward working condition indicator light on the vehicle shifter.

[0037] 3. When the vehicle is in reverse operation, the current of another signal from the sensor increases. After conversion, the signal is sent to the transmission control system. The system analyzes the signal and lights up the reverse operation indicator light on the vehicle's shifter.

[0038] 4. When the vehicle is in the parking condition, there is no change in the two sensor signals. The signal will not trigger the signal conversion circuit, and the transmission control system will not light up the forward / reverse operating indicator light on the vehicle's shifter.

[0039] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A gearbox ring gear position sensor, characterized in that: include: A sensor housing (1), a Hall element circuit (4), an air plug (3), and a magnet (2); the Hall element circuit (4) is embedded in the sensor housing (1), a lead of the Hall element circuit (4) is connected to the air plug (3), and the magnet (2) is located outside the sensor housing (1) and assembled inside a gear ring of a transmission. The sensor signal output is changed by changing the positional relationship between the magnet (2) and the Hall element in the Hall element circuit (4).

2. The gearbox ring gear position sensor according to claim 1, wherein: The sensor housing (1) and the Hall element circuit (4) are fixed using epoxy resin glue.

3. The gearbox ring gear position sensor according to claim 1, wherein: The sensor housing (1) is provided with a fixing hole, and the sensor is fixed to the inner gear ring of the special vehicle gearbox through the fixing hole.

4. The gearbox ring gear position sensor according to claim 1, wherein: The aviation plug (3) adopts the connector PCM4KWFTB.

5. The gearbox ring gear position sensor according to claim 4, wherein: The Hall element circuit (4) comprises a Hall element U1 and a Hall element U2. A resistor R1, a resistor R2, and a resistor R3 are connected in parallel between the VCC terminal and the output terminal of the Hall element U1. The VCC terminal of the Hall element U1 is connected to the power supply pin 1 of the connector PCM4KWFTB. A capacitor C1 is connected in parallel between the VCC terminal and the GND terminal of the Hall element U1 for filtering. The GND terminal of the Hall element U1 is connected to the ground pin 4 of the connector PCM4KWFTB. A resistor R4, a resistor R5, and a resistor R6 are connected in parallel between the VCC terminal and the output terminal of the Hall element U2. The VCC terminal of the Hall element U2 is connected to the signal pin 2 of the connector PCM4KWFTB. A capacitor C2 is connected in parallel between the VCC terminal and the GND terminal of the Hall element U2 for filtering. The GND terminal of the Hall element U2 is connected to the ground pin 4 of the connector PCM4KWFTB.

6. The gearbox ring gear position sensor according to claim 5, characterized in that: The Hall element circuit (4) adopts the vehicle-mounted DC 24V voltage distribution, and the Hall element U1 、 The Hall element U2 uses the highly sensitive Hall effect switch AH3362Q.

7. The gearbox ring gear position sensor according to claim 6, wherein: The resistors R1 , R2 , R4 and R5 are 10KΩ resistors.

8. The gearbox ring gear position sensor according to claim 7, wherein: The resistor R3 and the resistor R6 are 2.2KΩ resistors.

9. The gearbox ring gear position sensor according to claim 8, wherein: The capacitors C1 and C2 are 0.1uF / 50V capacitors.

10. The gearbox ring gear position sensor according to claim 9, wherein: The power supply pin 1 and the signal pin 2 of the connector PCM4KWFTB are connected to the positive pole of the DC 24V voltage, and the ground pin 4 of the connector PCM4KWFTB is connected to the negative pole of the DC 24V voltage.

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