CN118376336B - Test fixture for automobile exhaust temperature sensor - Google Patents

Abstract

The present invention discloses a test fixture for automobile exhaust temperature sensor, including a base, a connecting frame connected to one side of the base, a heating element connected to the connecting frame, a fixed rod connected to the upper end of the base, a horizontal rod and an arc bar connected to the fixed rod, a feeding pipe connected to the other end of the horizontal rod, a fixed frame connected to the horizontal rod, a limit frame fixedly connected to the fixed frame, a telescopic cylinder connected to the limit frame, the telescopic end of the telescopic cylinder passes through the fixed frame and is connected to a push frame, and the push frame is sleeved on the horizontal rod. In the present invention, a clamping tube is used to achieve the effect of driving the sensor to move, so that one end of the sensor for receiving information is close to the heating element, and the temperature characteristics of different distances from the heating element are used to achieve temperature detection of the sensor when it is close to the heating element. Under this condition, the temperature detection transition of the sensor is smooth, which improves the detection accuracy at different temperatures.

Description

Test fixture for automobile exhaust temperature sensor

Technical Field

The invention relates to the technical field of testing fixtures, and in particular to a testing fixture for an automobile exhaust temperature sensor.

Background Art

A sensor is a detection device that can sense the information being measured and convert the sensed information into electrical signals or other required forms of information output according to certain rules to meet the requirements of information transmission, processing, storage, display, recording and control.

Sensors sense various types of information and are often installed in complex working environments to replace manual testing, including the detection of automobile exhaust temperature. One of the factors affecting the sensitivity of sensors is temperature, that is, the sensitivity of sensors needs to be tested at different temperatures. Therefore, when sensors are produced, they need to be tested at different temperatures. The traditional testing method is to place multiple groups of sensors in different constant temperature boxes, and test them by observing the operating status of sensors at different temperatures and the real-time changes of data on them. This testing method requires the sensors to be moved back and forth, which will interfere with the test data of the sensors. As an improvement, the sensors are placed in a test box that can be heated, and the temperature change is used to avoid the problem of the impact of moving sensors back and forth on the test. However, this testing method requires multiple groups of sensors to be taken out at the same time after all tests are completed. Sensors of different models and different test ranges cannot be tested at the same time, resulting in some sensors that are not adapted to high temperatures needing to wait until other high-temperature sensors have completed the test before they can be taken out at the same time, which is very easy to damage the sensors. In addition, due to the heating process, there will be temperature differences at different positions in the box, which will interfere with the test data, that is, there is a lack of effective sensor temperature testing equipment.

Based on this, a test fixture for automobile exhaust temperature sensor is proposed.

Summary of the invention

The purpose of the present invention is to solve the above-mentioned problem and to propose a test fixture for an automobile exhaust temperature sensor.

In order to achieve the above object, the present invention adopts the following technical solutions:

A test fixture for an automobile exhaust temperature sensor, comprising a base, one side of the base is connected to a connecting frame, the connecting frame is connected to a heating element, the upper end of the base is connected to a fixing rod, the fixing rod is connected to a horizontal rod and an arc bar, the other end of the horizontal rod is connected to a feeding pipe, the horizontal rod is connected to a fixing frame, the fixing frame is fixedly connected to a limiting frame, the limiting frame is connected to a telescopic cylinder, the telescopic end of the telescopic cylinder penetrates the fixing frame and is connected to a pushing frame, and the pushing frame is sleeved on the horizontal rod;

The horizontal rod is slidably connected with a translation block, a notch hole is provided on the translation block, a flip shaft is rotatably connected to the translation block, two ends of the flip shaft are respectively connected with a clamping tube and a gear, the clamping tube is connected with a clamping spring, the clamping spring is connected with a telescopic piece, the telescopic piece is connected with a pressure strip, and the clamping tube is connected with a sensor to be tested;

A flipping mechanism for driving the sensor to be tested to flip is arranged on one side of the horizontal rod.

Preferably, a collection box is connected to one side of the base.

Preferably, the arc strip is fixedly connected to the horizontal rod.

Preferably, a limit ring is connected to the flip shaft, and the limit ring is symmetrically arranged on both sides of the translation block.

Preferably, a through tube is connected to the flip shaft, a spring member is connected inside the through tube, and an elliptical sleeve is connected to the translation block.

Preferably, the flipping mechanism includes a turntable, an arc rack is connected to the turntable, a notch ring is slidably connected to the horizontal rod, a motor frame is connected to the notch ring, a rotating motor is connected to the motor frame, the turntable is connected to the output shaft of the rotating motor, a spring frame 1 is connected to the notch ring, a spring frame 2 is connected to the translation block, and a deflection spring is connected between the spring frame 1 and the spring frame 2.

Preferably, the notched ring fits with the horizontal rod and the arc strip.

Preferably, a pressing column is connected to the translation block, a control button is connected to the fixing rod, and a cable is connected between the control button and the rotating motor.

In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

1. The present application adopts a clamping tube structure and utilizes the clamping tube to achieve the effect of driving the sensor to move, so that the end of the sensor for receiving information is close to the heating element. By utilizing the different temperatures at different distances from the heating element, the sensor can detect the temperature of the sensor when it is close to the heating element. Under this condition, the temperature detection transition of the sensor is smooth, thereby improving the detection accuracy at different temperatures.

2. The present application adopts a gear structure and utilizes gears to enable the sensor to be flipped. The sensor is in two states when it is close to the heating element and when it is far away from the heating element. The two states are that the end of the sensor receiving information is facing the heating element and the end is facing away from the heating element. The temperature detection of the sensor in the two states is realized, which greatly improves the detection accuracy.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic diagram showing the overall structure of a testing tool provided in an embodiment of the present invention;

FIG2 is a schematic structural diagram of the other side of the overall tooling provided by an embodiment of the present invention;

FIG3 is a schematic diagram showing an explosion structure of a connection portion of a sensor to be tested according to an embodiment of the present invention;

FIG4 is a schematic structural diagram of a telescopic cylinder connection provided in an embodiment of the present invention;

FIG. 5 is a schematic diagram showing an explosion structure of a gap ring connection provided according to an embodiment of the present invention.

Legend:

1. Base; 2. Connecting frame; 3. Heating element; 4. Collecting box; 5. Fixed rod; 6. Telescopic cylinder; 7. Horizontal rod; 8. Arc bar; 9. Feeding tube; 10. Control button; 11. Motor frame; 12. Rotating motor; 13. Turntable; 14. Arc rack; 15. Gear; 16. Limiting frame; 17. Fixed frame; 18. Translation block; 19. Elliptical sleeve; 20. Clamping tube; 21. Sensor to be tested; 22. Telescopic element; 23. Clamping spring; 24. Pressure strip; 25. Pushing frame; 26. Flipping axis; 27. Limiting ring; 28. Through tube; 29. Spring element; 30. Notch ring; 31. Spring frame one; 32. Deflection spring; 33. Notch hole; 34. Spring frame two; 35. Pressing column.

DETAILED DESCRIPTION

The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

Please refer to Figures 1-5, the present invention provides a technical solution:

The test fixture for automobile exhaust temperature sensor includes a base 1, a connecting frame 2 is connected to one side of the base 1, a heating element 3 is connected to the connecting frame 2, the heating element 3 has the effect of radiating heat, and the heat is radiated out. When the sensor 21 to be tested is close to the heating element 3, the temperature of the sensor 21 to be tested is in a slope rising state, and the temperature changes smoothly. In this state, the temperature test data of the sensor 21 to be tested is accurate. A fixing rod 5 is connected to the upper end of the base 1, and a horizontal rod 7 and an arc bar 8 are connected to the fixing rod 5. A feeding pipe 9 is connected to the other end of the horizontal rod 7. The feeding pipe 9 and the horizontal rod 7 are connected by a water drop sheet structure to ensure that the feeding pipe 9 is connected. The firmness of the structure. In order to avoid the operator from interfering with the temperature test process, the operator can only complete the test outside the feeding tube 9. After the test is completed, the operator needs to add the next sensor 21 to be tested in the feeding tube 9 again. The horizontal rod 7 is connected with a fixed frame 17, and the fixed frame 17 is fixedly connected with a limit frame 16. The limit frame 16 is connected with a telescopic cylinder 6. The telescopic end of the telescopic cylinder 6 passes through the fixed frame 17 and is connected with a push frame 25. The push frame 25 is sleeved on the horizontal rod 7. One end of the push frame 25 is a ring structure, which is sleeved on the horizontal rod 7, and the structure does not contact the horizontal rod 7 and the arc bar 8, thereby improving the stability of the movement of the push frame 25.

A translation block 18 is slidably connected to the horizontal rod 7, and a notch hole 33 is provided on the translation block 18. The notch on the notch hole 33 is larger than the arc bar 8, so that the translation block 18 can rotate around the horizontal rod 7 when it is limited by the horizontal rod 7. A flip shaft 26 is rotatably connected to the translation block 18, and the two ends of the flip shaft 26 are respectively connected to the clamping tube 20 and the gear 15. A clamping spring 23 is connected to the clamping tube 20, and one end of the clamping spring 23 is connected to the outside of the clamping tube 20. A telescopic member 22 is connected to the clamping spring 23, and a pressure strip 24 is connected to the telescopic member 22. The pressure strip 24 is arranged in the clamping tube 20, and an anti-slip strip can be arranged on one side of the pressure strip 24 to increase the clamping effect of the pressure strip 24 on the sensor to be tested 21. The sensor to be tested 21 is connected in the clamping tube 20;

A flipping mechanism is provided on one side of the horizontal rod 7 to drive the sensor 21 to flip. The flipping mechanism is used to drive the sensor 21 to flip so that the end of the sensor 21 to receive the signal is facing the heating element 3 and facing away from the heating element 3 for temperature testing.

Specifically, as shown in FIG. 1 , a collecting box 4 is connected to one side of the base 1 . The collecting box 4 is arranged so that the sensor 21 to be tested is ejected by the next sensor after the test is completed, and its structure can fall into the collecting box 4 for recovery.

Specifically, as shown in FIG. 2 , the arc bar 8 is fixedly connected to the horizontal rod 7 , and the arc bar 8 is provided to limit the notch ring 30 and the translation block 18 .

Specifically, as shown in FIG3 , the flip shaft 26 is connected to a limit ring 27 , which is symmetrically arranged on both sides of the translation block 18 . The limit ring 27 ensures that the connection position of the flip shaft 26 will not be offset, thereby ensuring the smooth movement of the sensor 21 to be tested during the test.

Specifically, as shown in Figure 3, the flip shaft 26 is connected to a through tube 28, and a spring member 29 is connected inside the through tube 28. The translation block 18 is connected to an elliptical sleeve 19, wherein the spring member 29 has a structure with a spring in the middle and abutment columns at both ends. The spring member 29 has a correction effect, and one end of the abutment column has a tendency to abut against the structure at the long diameter of the elliptical sleeve 19. The drive can make the clamping tube 20 in a horizontal state, thereby improving the stability of the structure.

Specifically, as shown in Figures 2 and 3, the flip mechanism includes a turntable 13, which is connected to an arc rack 14, which is a one-stage structure. The arc rack 14 can drive the gear 15 to rotate, and a notch ring 30 is slidably connected to the horizontal rod 7, and a motor frame 11 is connected to the notch ring 30, and a rotating motor 12 is connected to the motor frame 11. The rotating motor 12 and the motor frame 11 are fixedly connected, and the turntable 13 is connected to the output shaft of the rotating motor 12, and a spring frame 1 31 is connected to the notch ring 30, and a spring frame 2 34 is connected to the translation block 18. The spring frame 1 31 and the spring frame 2 34 are arranged opposite to each other, and a deflection spring 32 is connected between the spring frame 1 31 and the spring frame 2 34, and the deflection spring 32 can be used to pull the spring frame 1 31 and the spring frame 2 34 closer to each other.

Specifically, as shown in FIG. 5 , the notch ring 30 fits with the horizontal rod 7 and the arc strip 8 , and the notch provided on the notch ring 30 fits with the arc strip 8 .

Specifically, as shown in Figure 1, a pressing column 35 is connected to the translation block 18, and a control button 10 is connected to the fixed rod 5. The pressing column 35 and the control button 10 are arranged opposite to each other, and a cable is connected between the control button 10 and the rotating motor 12. When the control button 10 is pressed, the rotating motor 12 starts to run.

In summary, the test fixture for the automobile exhaust temperature sensor provided in the present embodiment, when it is necessary to perform a temperature test on the sensor, first turn on the heating element 3, use one end of the heating element 3 as the heat source, and the heat is dispersed to the surroundings. The temperature is higher when it is close to the heating element 3. Under the premise that the temperature at one end of the heating element 3 is fixed and there is no interference from the external environment, the temperature change after radiation is fixed. Then the sensor is placed in the feeding tube 9, and the operator needs to abut one end of the sensor, start the telescopic cylinder 6, and use the telescopic cylinder 6 to extend to drive the pushing frame 25 connected to the telescopic end of the telescopic cylinder 6 to move in the horizontal direction, wherein one end of the pushing frame 25 is annular, and the annular structure is provided with two, the two annular structures are clamped on the outside of the notch ring 30, and the notch ring 30 structure is clamped on the outside of the translation block 18, that is, when the pushing frame 25 moves, it will drive the translation block 18 to slide on the horizontal rod 7, thereby achieving the effect of driving the clamping tube 20 connected to one side of the translation block 18 to move;

When the clamping tube 20 moves, the operation of docking one end of the clamping tube 20 with the sensor 21 to be tested can be completed. Since one end of the pressure strip 24 structure connected in the clamping tube 20 is in an inclined state, it is convenient for the sensor 21 to be tested to enter the clamping tube 20, and the pressure strip 24 is used to achieve the effect of clamping the sensor 21 to be tested, wherein the telescopic member 22 connected to the pressure strip 24 is slidably connected to the clamping tube 20, and the clamping spring 23 connected thereto pulls the telescopic member 22, ensuring that the pressure strip 24 can clamp the sensor 21 to be tested. When the telescopic cylinder 6 is extended to the maximum distance, the docking operation between the clamping tube 20 and the sensor 21 to be tested is completed;

Then the telescopic cylinder 6 starts to shrink, and the clamping tube 20 drives the sensor 21 to move toward the heating element 3. The operating state of the sensor 21 under different temperature conditions is understood through the signal sent by the sensor 21. During this process, the telescopic cylinder 6 can be stopped at any time to interrupt the test process to avoid high temperature from damaging the structure of the sensor 21.

During the contraction of the telescopic cylinder 6, the flip shaft 26 will enter the limit frame 16. The part that has just entered the limit frame 16 is a horizontal structure. As the flip shaft 26 continues to enter the limit frame 16, the flip shaft 26 will transition to a horizontal limit structure via an inclined structure. That is, the limit frame 16 is composed of two-section horizontal structures and an inclined structure at one end. The inclined structure is arranged between the two sections of the horizontal structure. The heights of the two sections of the horizontal structure are different. Before and when the flip shaft 26 just enters the horizontal structure of the limit frame 16, the flip shaft 26 is in an inclined state. The maintenance of the inclined state is completed by the deflection spring 32. The deflection spring 32 pulls the spring frame 1 31 and the spring frame 2 34 closer to each other, so the notch hole 33 on the translation block 18 can slide along the horizontal rod 7, and the translation block 18 can also rotate around the horizontal rod 7, but the notch ring 30 can only slide along the horizontal rod 7, and the notch on the notch ring 30 can fit and dock with the arc bar 8, but the notch on the notch hole 33 cannot fit and dock with the arc bar 8. This structural setting facilitates the flipping of the flip shaft 26, ensuring that the gear 15 can mesh with the arc rack 14 on the turntable 13, and the arc rack 14 is used to drive the gear 15 to rotate;

When the pressing column 35 on the translation block 18 contacts the control button 10, the control button 10 has the function of controlling the rotation of the rotary motor 12, and the rotary motor 12 is used to drive the turntable 13 to rotate, and the arc rack 14 on the turntable 13 is used to drive the gear 15 to rotate. There is a pause time between the extension and contraction of the telescopic cylinder 6, which is the time when the control button 10 is pressed. This time can realize the turntable 13 to rotate one circle, driving the gear 15 to rotate half a circle. At this time, the sensor 21 to be tested connected to the clamping tube 20 just rotates half a circle, so that the terminal for receiving the signal at one end of the sensor 21 to be tested flips and turns around. At this time, the telescopic cylinder 6 is cooperated to push the sensor 21 to be tested away from the heating element 3, so as to realize the temperature test process of the sensor 21 to be tested in another state. The test tooling can realize the temperature test operation of the sensor 21 to be tested in two states. The temperature change during the test of the sensor 21 to be tested is stable, the effect of the sensor change caused by temperature is obvious, and the test data is more accurate.

The above description of the embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims (7)

1. The utility model provides a test fixture for automobile exhaust temperature sensor, includes base (1), a serial communication port, base (1) one side is connected with link (2), be connected with heating element (3) on link (2), base (1) upper end is connected with dead lever (5), be connected with horizon bar (7) and arc strip (8) on dead lever (5), the horizon bar (7) other end is connected with conveying pipe (9), be connected with mount (17) on horizon bar (7), fixedly connected with spacing (16) on mount (17), be connected with telescopic cylinder (6) on spacing (16), telescopic end runs through mount (17) and is connected with pushing frame (25), pushing frame (25) cover is established on horizon bar (7);

The horizontal rod (7) is connected with a translation block (18) in a sliding manner, a notch hole (33) is formed in the translation block (18), a turnover shaft (26) is connected to the translation block (18) in a rotating manner, two ends of the turnover shaft (26) are respectively connected with a clamping tube (20) and a gear (15), a clamping spring (23) is connected to the clamping tube (20), a telescopic piece (22) is connected to the clamping spring (23), a pressing strip (24) is connected to the telescopic piece (22), and a sensor (21) to be detected is connected to the clamping tube (20);

The utility model provides a sensor (21) upset tilting mechanism is awaited measuring to horizontal pole (7) one side is provided with, tilting mechanism includes carousel (13), be connected with arc rack (14) on carousel (13), sliding connection has notch ring (30) on horizontal pole (7), be connected with motor frame (11) on notch ring (30), be connected with rotating electrical machines (12) on motor frame (11), carousel (13) are connected on rotating electrical machines (12) output shaft, be connected with spring frame one (31) on notch ring (30), be connected with spring frame two (34) on translation piece (18), be connected with deflection spring (32) between spring frame one (31) and spring frame two (34).

2. The test fixture for an automobile exhaust temperature sensor according to claim 1, wherein a collecting box (4) is connected to one side of the base (1).

3. The test fixture for an automobile exhaust temperature sensor according to claim 1, wherein the arc strip (8) is fixedly connected to the horizontal rod (7).

4. The test fixture for the automobile exhaust temperature sensor according to claim 1, wherein the overturning shaft (26) is connected with limiting rings (27), and the limiting rings (27) are symmetrically arranged on two sides of the translation block (18).

5. The test fixture for the automobile exhaust temperature sensor according to claim 1, wherein the turnover shaft (26) is connected with a penetrating pipe (28), a spring member (29) is connected in the penetrating pipe (28), and the translation block (18) is connected with an elliptical sleeve (19).

6. The test fixture for an automobile exhaust temperature sensor according to claim 1, wherein the notch ring (30) is mutually engaged with the horizontal rod (7) and the arc strip (8).

7. The test fixture for the automobile exhaust temperature sensor according to claim 1, wherein the translation block (18) is connected with a pressing column (35), the fixed rod (5) is connected with a control button (10), and a cable is connected between the control button (10) and the rotating motor (12).