A correction tool for an engine torque sensor

Abstract

The application discloses a kind of correction tool of engine torque sensor, belong to engine technical field, solve the problem that torque sensor used when engine torque test is difficult to correct.This tool includes two ends and workbench support connection support rod, the support rod is opened with limit slot, the limit slot is movably inserted with pin shaft, the pin shaft one end passes through torque connector and extends vertically and inserts motor rotating shaft, the other end of the pin shaft is equipped with upper fixed seat, the upper fixed seat is equipped with bar end joint bearing, the pin shaft is inserted in bar end joint bearing, the upper fixed seat bottom is connected with tension sensor, the tension sensor bottom is connected with lower fixed seat.The correction tool of engine torque sensor of the application can effectively fix the motor rotating shaft, and can also smoothly carry out torque test, with the characteristics of convenient to use, strong practicality.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of engine, in particular to a kind of correction tool of engine torque sensor. BACKGROUND

[0002] As Figure 1 As shown in the engine 22 torque test, conventional test method is driven under the rotation of motor 18 the crankshaft of engine 22, by reading the data of torque sensor 19 coaxially installed with motor, so as to obtain the rotation torque of engine. This method of reading torque sensor 19 data, indeed can evaluate the torque value of engine crankshaft rotation, but due to the long-term work of motor, the deviation between the theoretical value of motor output power and the actual value obtained by engine crankshaft is large, and torque sensor 19 needs to be corrected or parameter adjusted, since the motor rotating shaft is circular rotation, it is difficult to fix or clamp for testing, resulting in difficult to carry out torque sensor 19 calibration work. SUMMARY

[0003] The technical problem to be solved by the present application is to provide a kind of correction tool of engine torque sensor, which can quickly calibrate torque sensor in engine torque test, ensure the accuracy of engine torque test, and has the characteristics of convenient use and strong practicability.

[0004] The technical scheme adopted by the present application is: a kind of correction tool of engine torque sensor, including the support rod connected with the workbench support at both ends, the support rod is provided with a limiting slot, the limiting slot is movably inserted with a pin shaft, one end of the pin shaft passes through a torque connector and extends vertically into the motor rotating shaft, the other end of the pin shaft is provided with an upper fixed seat, the upper fixed seat is provided with a rod end joint bearing, the pin shaft is inserted in the rod end joint bearing, the bottom of the upper fixed seat is connected with a tension sensor, the bottom of the tension sensor is connected with a lower fixed seat, the upper fixed seat and the lower fixed seat are symmetrically arranged, the lower fixed seat is connected with a base, the base is installed on the workbench support, and the tension sensor is electrically connected with an industrial computer.

[0005] As a further improvement, the support rod above the pin shaft is provided with a mounting hole, the mounting hole is provided with a photoelectric sensor, and the pin shaft is embedded with a reflecting plate corresponding to the photoelectric sensor.

[0006] Further, a screw rod is arranged on one end of the pin shaft close to the upper fixed seat, and the screw rod is threadedly connected with a locking nut through the upper fixed seat.

[0007] Further, a spring is arranged outside the screw rod, and the spring is located between the locking nut and the upper fixed seat.

[0008] Furthermore, the tension / compression sensor is provided with threaded posts at both the upper and lower ends, and the threaded posts on the upper and lower sides are respectively threadedly connected to the upper fixed seat and the lower fixed seat.

[0009] Furthermore, the lower fixing seat and the base are detachably connected by a pin.

[0010] Beneficial effects

[0011] Compared with the prior art, the present invention has the following advantages:

[0012] This invention discloses a calibration fixture for an engine torque sensor. First, the base is installed in the designated position. Then, the lower threaded post of the tension / compression sensor is connected to the lower fixed base, and the upper threaded post of the tension / compression sensor is also connected to the lower fixed base. A pin is passed through the support rod and inserted into the torque connector of the torque sensor, and then inserted into the motor shaft. The photoelectric sensor determines whether the pin is properly installed. Next, the lower fixed base is inserted into the side block of the base and locked with a pin. The motor shaft is manually rotated. If the pin is firmly engaged in the motor shaft and other connecting parts are not loose, the fixture is considered assembled successfully. After installation, because the pin is engaged in the motor shaft, the torque sensor receives a torque value when the motor rotates. Meanwhile, the motor shaft drives the pin shaft to rotate, which in turn acts on the tension / compression sensor. The tension / compression sensor transmits the pressure value to the industrial control computer via a data acquisition card. By comparing the pressure value of the sensor with the lever arm value of the pin shaft, the industrial control computer obtains the torque value of the motor. By comparing the torque value on the industrial control computer with the torque value of the torque sensor, the torque sensor can be calibrated or its parameters adjusted. This calibration fixture has a simple structure, is easy to install and disassemble, and can quickly calibrate the torque sensor in engine torque testing, ensuring the accuracy of engine torque testing. It is convenient to use and highly practical. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of an existing engine torque testing structure.

[0014] Figure 2 This is a schematic diagram of the main structure of the present invention;

[0015] Figure 3 This is a side cross-sectional view of the present invention.

[0016] Figure 4 This is an enlarged schematic diagram of the pin structure in this invention.

[0017] The components are: 1-support rod, 2-pin, 3-workbench bracket, 4-torque connector, 5-motor shaft, 6-upper fixed seat, 7-tension and compression sensor, 8-lower fixed seat, 9-base, 10-pin, 11-photoelectric sensor, 12-industrial computer, 13-reflector, 14-screw, 15-locking nut, 16-spring, 17-threaded column, 18-motor, 19-torque sensor, 20-rod end joint bearing, 21-limiting groove. Detailed Implementation

[0018] The present invention will be further described below with reference to specific embodiments shown in the accompanying drawings.

[0019] See Figures 2-4As shown, a calibration fixture for an engine torque sensor according to the present invention includes a support rod 1 connected to a workbench support 3 at both ends. A limiting groove 21 is formed on the support rod 1, and a pin 2 is movably inserted into the limiting groove 21. One end of the pin 2 passes through a torque connector 4 and extends vertically into a motor shaft 5. The other end of the pin 2 is provided with an upper fixed seat 6, and a rod end joint bearing 20 is provided on the upper fixed seat 6. The pin 2 is inserted into the rod end joint bearing 20. A tension / compression sensor 7 is connected to the bottom of the upper fixed seat 6, and a lower fixed seat 8 is connected to the bottom of the tension / compression sensor 7. The upper fixed seat 6 and the lower fixed seat 8 are symmetrically arranged. A base 9 is connected to the lower fixed seat 8, and the base 9 is mounted on the workbench support 3. The tension / compression sensor 7 is electrically connected to an industrial control computer 12, and a data acquisition card is provided on the industrial control computer 12. The data acquisition card is electrically connected to the tension / compression sensor 7. First, through... Install the base 9 into the designated position on the workbench bracket 3. Then, thread the lower threaded post 17 of the tension / compression sensor 7 to the lower fixed seat 8. Thread the upper threaded post 17 of the tension / compression sensor 7 to the lower fixed seat 8. Insert the pin 2 through the support rod 1 into the torque connector 4 of the torque sensor 19 and into the motor shaft 5. Then, project the signal onto the reflector 13 via the photoelectric sensor 11 to determine if the pin 2 is installed correctly. Next, insert the lower fixed seat 8 into the two side blocks of the base 9 and lock it in place using the pin 10. Manually rotate the motor shaft 5. If the pin 2 can be firmly locked into the motor shaft 5 and other connecting parts are not loose, the tooling is considered assembled. After installation, since the pin 2 has locked the motor shaft 5, the torque sensor 19 will receive the torque value when the motor 18 rotates. Meanwhile, the motor shaft 5 drives the pin 2 to rotate, which in turn acts on the tension / compression sensor 7. The tension / compression sensor 7 transmits the pressure value to the industrial control computer 12 through the data acquisition card. The industrial control computer 12 obtains the reaction torque by comparing the pressure value of the sensor with the lever arm value of the pin, and thus obtains the torque value of the motor 18. By comparing the torque value on the industrial control computer 12 with the torque value of the torque sensor 19, the torque sensor 19 can be calibrated or its parameters adjusted. This calibration fixture has a simple structure, is easy to install and disassemble, and can quickly calibrate the torque sensor 19 in the engine torque test, ensuring the accuracy of the engine torque test.

[0020] Specifically, a mounting hole is provided on the support rod 1 above the pin 2, and a photoelectric sensor 11 is provided in the mounting hole. A reflector 13 corresponding to the photoelectric sensor 11 is embedded on the pin 2. When the pin 2 is successfully inserted into the motor shaft 5, the reflector 13 is located directly below the photoelectric sensor 11. The photoelectric sensor 11 can detect whether the pin 2 has been installed in place by reflecting the signal through the reflector.

[0021] Preferably, a screw 14 is provided on one end of the pin 2 near the upper fixed seat 6. The screw 14 passes through the upper fixed seat 6 and is threadedly connected to the locking nut 15. The locking nut 15 is used to lock the installation and prevent the pin 2 from loosening and falling off.

[0022] Furthermore, a spring 16 is provided on the outer sleeve of the screw 14. The spring 16 is located between the locking nut 15 and the upper fixed seat 6, providing tension to the locking nut 15 and preventing the locking nut 15 from loosening.

[0023] Furthermore, the tension / compression sensor 7 has threaded posts 17 at both the upper and lower ends. The threaded posts 17 on the upper and lower sides are threadedly connected to the upper fixed seat 6 and the lower fixed seat 8 respectively. The use of threaded connection facilitates installation and disassembly.

[0024] Furthermore, the lower fixing seat 8 and the base 9 are detachably connected by pins 10, which facilitates installation and disassembly.

[0025] In this embodiment, the calibration fixture for an engine torque sensor is used by first installing the base 9 to the designated position on the workbench bracket 3, then threading the lower threaded post 17 of the tension / compression sensor 7 to the lower fixed seat 8, and connecting the upper threaded post 17 of the tension / compression sensor 7 to the lower fixed seat 8. The pin 2 is then inserted through the support rod 1 into the torque connector 4 of the torque sensor 19 and into the motor shaft 5. The photoelectric sensor 11 projects the signal onto the reflector 13 to determine if the pin 2 is properly installed. Next, the lower fixed seat 8 is inserted into the two side blocks of the base 9 and locked using pins 10. The motor shaft 5 is then manually rotated. If the pin 2 can be firmly engaged in the motor shaft 5 and other connecting parts are not loose, the fixture is considered assembled. After installation, since the pin 2 has engaged the motor shaft 5, the torque sensor 19 receives the torque value when the motor 18 rotates. Simultaneously, the motor shaft 5 drives the pin 2 to rotate, which in turn acts on the tension / compression sensor 7. The tension / compression sensor 7 transmits the pressure value to the industrial control computer 12 via a data acquisition card. The industrial control computer 12 obtains the reaction torque by comparing the pressure value of the sensor with the lever arm value of the pin, thus acquiring the torque value of the motor 18. By comparing the torque value on the industrial control computer 12 with the torque value of the torque sensor 19, the torque sensor 19 can be calibrated or its parameters adjusted. This invention provides a calibration fixture for an engine torque sensor, which has a simple structure, facilitates installation and disassembly, and allows for rapid calibration of the torque sensor 19 during engine torque testing, ensuring the accuracy of the engine torque test.

[0026] The above description is only a preferred embodiment of the present invention. It should be noted that those skilled in the art can make several modifications and improvements without departing from the structure of the present invention, and these will not affect the effectiveness of the implementation of the present invention or the practicality of the patent.

Claims

1. A calibration fixture for an engine torque sensor, characterized in that, The device includes a support rod (1) connected to the workbench support (3) at both ends. A limiting groove (21) is provided on the support rod (1). A pin (2) is movably inserted into the limiting groove (21). One end of the pin (2) passes through a torque connector (4) and extends vertically into the motor shaft (5). The other end of the pin (2) is provided with an upper fixed seat (6). A rod end joint bearing (20) is provided on the upper fixed seat (6). The pin (2) is inserted into the rod end joint bearing (20). A tension / compression sensor (7) is connected to the bottom of the upper fixed seat (6). A lower fixed seat (8) is connected to the bottom of the tension / compression sensor (7). The upper fixed seat (6) and the lower fixed seat (8) are arranged symmetrically. A base (9) is connected to the lower fixed seat (8). The base (9) is mounted on the workbench support (3). The tension / compression sensor (7)... An industrial control computer (12) is electrically connected. A mounting hole is provided on the support rod (1) above the pin (2). A photoelectric sensor (11) is provided in the mounting hole. A reflector (13) corresponding to the photoelectric sensor (11) is embedded on the pin (2). A screw (14) is provided on one end of the pin (2) near the upper fixed seat (6). The screw (14) passes through the upper fixed seat (6) and is threaded to the locking nut (15). A spring (16) is provided on the outer sleeve of the screw (14). The spring (16) is located between the locking nut (15) and the upper fixed seat (6). The tension and compression sensor (7) is provided with threaded posts (17) at both the upper and lower ends. The threaded posts (17) on the upper and lower sides are threaded to the upper fixed seat (6) and the lower fixed seat (8) respectively. The lower fixed seat (8) and the base (9) are detachably connected by a pin (10).

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