Sensor precision test tool with camshaft phase gear

Abstract

The utility model relates to a precision testing tool for a sensor with a camshaft phase gear, which comprises a servo motor, a shaft sleeve is arranged outside the output end of the servo motor, the camshaft phase gear is arranged at one end, far away from the servo motor, of the shaft sleeve, a plurality of tooth grooves are formed in the side wall of the camshaft phase gear, and the tooth grooves are communicated with the shaft sleeve. A fixing plate is arranged on the outer side of the output end of the servo motor, a sensor supporting plate is detachably arranged on the top of the fixing plate, a sensor mounting hole is formed in the surface of the sensor supporting plate, and an infrared receiving mechanism mounting frame is arranged on the side, away from the servo motor, of the fixing plate; an infrared transmitter and an infrared receiver are arranged on the side, facing the camshaft phase gear, of the infrared receiving mechanism installation frame. By arranging the sensor supporting plate, the infrared transmitter and the infrared receiver, the working state of the sensor can be detected, and meanwhile, the phase precision error of the sensor can be measured.

Description

Technical Field

[0001] This utility model relates to the field of testing equipment technology, specifically to a sensor accuracy testing fixture with a camshaft phase gear. Background Technology

[0002] Product testing is a crucial step in quality control before products leave the factory. It is an essential step in verifying whether a product is qualified and meets design requirements, and it is of paramount importance, especially in the field of sensor manufacturing. Sensors that detect camshaft phasing gears are key components in the engine management system, used to monitor the position or movement of the camshaft phasing gears and provide real-time data to the engine control unit (ECU) for precise ignition control, fuel injection control, and valve timing adjustment. Testing requires trials on an engine bench or in a complete vehicle, and sensor testing also needs to be performed on an engine bench or in a complete vehicle, making the process time-consuming and labor-intensive.

[0003] Existing testing fixtures are bulky and inconvenient to use, and cannot achieve accurate testing of sensor performance and phase accuracy. Utility Model Content

[0004] The purpose of this invention is to solve the problems of complex operation and low detection accuracy of existing testing fixtures.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A sensor accuracy testing fixture with a camshaft phase gear includes a servo motor. A bushing is provided on the outside of the output end of the servo motor. A camshaft phase gear is provided on the end of the bushing away from the servo motor. The side wall of the camshaft phase gear is provided with several tooth grooves. A fixing plate is provided on the outside of the output end of the servo motor. A sensor support plate is detachably provided on the top of the fixing plate. A sensor mounting hole is opened on the surface of the sensor support plate. The sensor mounting hole is located directly above the camshaft phase gear. An infrared receiver mounting bracket is provided on the side of the fixing plate away from the servo motor. An infrared transmitter and an infrared receiver are respectively provided on the side of the infrared receiver mounting bracket facing the camshaft phase gear. The infrared transmitter and the infrared receiver are arranged facing each other on both sides of the camshaft phase gear.

[0007] Furthermore, the output end of the servo motor is provided with a rotating shaft, and the bushing is detachably sleeved on the outside of the rotating shaft.

[0008] Furthermore, the fixing plate is rectangularly arranged around the rotating shaft, and an oblong hole is provided at the connection between the sensor support plate and the fixing plate.

[0009] Furthermore, the infrared receiver mounting bracket includes a connecting plate, which is L-shaped and disposed on the side wall of the fixed plate. A transmitter bracket is disposed at the other end of the connecting plate, and the infrared transmitter is disposed on the side wall of the transmitter bracket facing the camshaft phase gear.

[0010] Furthermore, a receiver bracket is provided on the side wall of the connecting plate facing the sensor support plate, and the infrared receiver is provided on the side wall of the receiver bracket facing the camshaft phase gear.

[0011] Furthermore, a base is provided at the bottom of the fixing plate.

[0012] The beneficial effects of this utility model are as follows:

[0013] 1. The camshaft phase gear sensor testing fixture of this utility model, by setting up a sensor support plate, an infrared transmitter and an infrared receiver, can realize the detection of the working status of the sensor, and at the same time, can accurately measure the phase accuracy error of the sensor.

[0014] 2. The camshaft phase gear sensor testing fixture of this utility model, by setting a fixing plate, a connecting plate, a receiver bracket and a transmitter bracket, allows for convenient disassembly and replacement of the sensor, enabling testing of different sensors, while improving the stability of the test. The structure is simple and compact, and easy to carry and install. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of a sensor accuracy testing fixture with a camshaft phase gear according to the present invention.

[0016] Figure 2 This is a side view schematic diagram of a sensor accuracy testing fixture with a camshaft phase gear according to the present invention.

[0017] Figure 3 This is a schematic diagram of the mounting structure of a sensor accuracy testing fixture with a camshaft phase gear according to the present invention.

[0018] Reference numerals: 1. Servo motor; 2. Base; 3. Fixing plate; 4. Sensor support plate; 5. Infrared receiver; 501. Receiver bracket; 6. Infrared transmitter; 601. Transmitter bracket; 7. Camshaft phase gear; 8. Bushing; 9. Connecting plate. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this utility model clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this utility model.

[0020] refer to Figure 1 The sensor testing fixture of this utility model includes a servo motor 1. A bushing 8 is provided on the outside of the output end of the servo motor 1. A camshaft phase gear 7 is provided on the end of the bushing 8 away from the servo motor 1. The side wall of the camshaft phase gear 7 is provided with several tooth grooves. A fixing plate 3 is fixedly provided on the outside of the output end of the servo motor 1. A sensor support plate 4 is detachably provided on the top of the fixing plate 3. A sensor mounting hole is opened on the surface of the sensor support plate 4. The inside of the sensor mounting hole is used to install the sensor under test. The sensor mounting hole is located directly above the camshaft phase gear 7. An infrared receiver mechanism mounting bracket is fixedly provided on the side of the fixing plate 3 away from the servo motor 1. It is used to install an infrared transmitter 6 and an infrared receiver. An infrared transmitter 6 and an infrared receiver 5 are fixedly provided on the side of the infrared receiver mechanism mounting bracket facing the camshaft phase gear. The infrared transmitter 6 is used to emit infrared signals and the infrared receiver 5 is used to receive infrared signals. The infrared transmitter 6 and the infrared receiver 5 are arranged facing each other on both sides of the camshaft phase gear. When in use, the servo motor 1 is started, causing the bushing 8 and the camshaft phase gear 7 to start rotating. At this time, the motion state of the camshaft phase gear 7 can be monitored by the sensor on the top of the camshaft phase gear 7. When the tooth tip of the camshaft phase gear 7 rotates to the position directly below the sensor, it outputs a low level; when the tooth groove is directly below the sensor, it outputs a high level. At this time, the tooth tip and tooth groove pass under the sensor in sequence. According to the waveform of the sensor output signal, it can be determined whether the sensor is working properly. When the camshaft phase gear 7 moves to the critical point between the tooth tip and the tooth groove, due to the sensor's accuracy and installation error, the high and low level transition point will not be consistent with the tooth tip and tooth groove critical point, thus generating a phase accuracy error. At this time, the infrared transmitter 6 emits infrared light, which can be received by the infrared receiver 5. The infrared receiver 5 outputs a low level after receiving the infrared light; otherwise, it outputs a high level. When the tooth tip and tooth groove critical point rotates past the infrared light position, the infrared receiver 5 will generate a high and low level transition. This can detect the position of the tooth tip and tooth groove critical point of the camshaft phase gear 7. The output signals of the infrared receiver 5 and the sensor are collected simultaneously, and thus the sensor phase accuracy error can be obtained.

[0021] refer to Figure 2-3The output end of the servo motor 1 is equipped with a rotating shaft, and the bushing 8 is detachably fitted onto the outside of the rotating shaft, making it easy to replace the bushing 8 and the camshaft phase gear 7. The fixing plate 3 is arranged in a rectangle around the rotating shaft, and the connection between the sensor support plate 4 and the fixing plate 3 is provided with an oblong hole, which allows for easy replacement of the sensor support plate 4, thereby enabling quick disassembly and replacement of the sensor under test and realizing the testing of different sensors. The infrared receiver mechanism mounting bracket includes a connecting plate 9, which is arranged in an "L" shape. The other end of the connecting plate 9 is fixedly equipped with a transmitter bracket 601, and the side wall of the connecting plate 9 facing the sensor support plate 4 is fixedly equipped with a receiver bracket 501. By setting the connecting plate 9, the transmitter bracket 601 and the receiver bracket 501, the infrared transmitter 6 and the infrared receiver 5 can be kept fixed during operation, reducing test errors.

[0022] A base 2 is fixedly mounted on the bottom of the fixing plate 3. By providing the base 2, the stability of the testing fixture during testing can be improved, shaking can be reduced, and testing accuracy can be improved.

[0023] Working principle: When in use, the servo motor 1 is started, causing the bushing 8 and the camshaft phase gear 7 to start rotating. At this time, the motion state of the camshaft phase gear 7 can be monitored by the sensor on the top of the camshaft phase gear 7. When the tooth tip of the camshaft phase gear 7 rotates to the position directly below the sensor, it outputs a low level; when the tooth groove is directly below the sensor, it outputs a high level. At this time, the tooth tip and tooth groove pass under the sensor in sequence. According to the waveform of the sensor output signal, it can be determined whether the sensor is working properly. When the camshaft phase gear 7 moves to the critical point between the tooth tip and the tooth groove, due to the accuracy of the sensor and installation errors, the high and low level transition point will not be consistent with the tooth tip and tooth groove critical point, thus generating a phase accuracy error. At this time, the infrared transmitter 6 emits infrared light, which can be received by the infrared receiver 5. The infrared receiver 5 outputs a low level after receiving the infrared light; otherwise, it outputs a high level. When the tooth tip and tooth groove critical point rotates past the infrared light position, the infrared receiver 5 will generate a high and low level transition. This can detect the position of the tooth tip and tooth groove critical point of the camshaft phase gear 7. The output signals of the infrared receiver 5 and the sensor are collected simultaneously, and thus the sensor phase accuracy error can be obtained.

[0024] The above embodiments are used to further illustrate the present invention, but do not limit the present invention to these specific embodiments. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be understood as being within the protection scope of the present invention.

Claims

1. A sensor accuracy test tool with camshaft phaser gear, characterized by: The utility model provides a servo motor (1) is provided with the shaft sleeve (8) outside the output end, the shaft sleeve (8) is provided with the camshaft phase gear (7) away from servo motor (1) one end, the side wall of camshaft phase gear (7) is provided with a plurality of tooth slot, the output end of servo motor (1) is provided with the fixed plate (3) outside, the top of fixed plate (3) is detachably provided with sensor support plate (4), the surface of sensor support plate (4) is provided with sensor mounting hole, sensor mounting hole is provided with the right above camshaft phase gear (7), the side of fixed plate (3) away from servo motor (1) is provided with infrared receiving mechanism mounting bracket, infrared receiving mechanism mounting bracket is provided with infrared emitter (6) and infrared receiver (5) respectively towards the side of camshaft phase gear (7), infrared emitter (6) and infrared receiver (5) are provided with the right and left sides of camshaft phase gear (7).

2. A sensor accuracy test tool with camshaft phaser gear according to claim 1, characterized in that: The output end of the servo motor (1) is provided with a rotating shaft, and the shaft sleeve (8) is detachably sleeved outside the rotating shaft.

3. A sensor accuracy test tool with camshaft phaser gear according to claim 1, characterized in that: The fixed plate (3) is arranged in a rectangular shape around the rotating shaft, and a waist-shaped hole is formed at the connection between the sensor support plate (4) and the fixed plate (3).

4. The sensor accuracy test tool with camshaft phaser gear of claim 1, wherein: The infrared receiving mechanism mounting bracket includes a connecting plate (9), which is arranged in an "L" shape on the side wall of the fixed plate (3), and the other end of the connecting plate (9) is provided with an emitter support (601), and the infrared emitter (6) is arranged on the side wall of the emitter support (601) facing the camshaft phase gear (7).

5. A sensor accuracy test tool with camshaft phaser gear according to claim 4, characterized in that: The side wall of the connecting plate (9) facing the sensor support plate (4) is provided with a receiver support (501), and the infrared receiver (5) is arranged on the side wall of the receiver support (501) facing the camshaft phase gear (7).

6. A sensor accuracy test tool with camshaft phaser gear according to claim 1, characterized in that: The bottom of the fixed plate (3) is provided with a base (2).

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