Sensor six-connection-assembly rapid precision testing tool

Abstract

The invention provides a sensor six-connection-assembly rapid precision testing tool, and relates to the technical field of sensor precision testing. The sensor six-connection rapid precision testing tool comprises a fixed seat, a pressurizing air inlet pipe, two groups of cover plates and six groups of sensor bodies. According to the invention, the six groups of sensor bodies are connected with the fixed seat through the cover plate, are fixed through the four screw rods, are clamped at one time, and are tested by using the same air inlet hole, so that the test efficiency and the test precision are effectively improved, and the contact between the positioning pin and the positioning hole is prior to the contact between the detection end and the detection hole; the edge of one end, far away from the cover plate, of the positioning pin, the edge of the detection hole, the edge of the positioning hole and the edge of the mounting hole are all provided with arc chamfers, and the matched parts do not need to be completely aligned when being mutually inserted, so that the installation precision is effectively improved. And the mounting speed can be effectively improved through the arc chamfer.

Description

Technical Field

[0001] The invention relates to the technical field of sensor accuracy testing, and in particular to a six-pack rapid accuracy testing tool for sensors. Background Art

[0002] The pressure sensor core test tooling is an indispensable device in the pressure sensor core test. The quality of the test tooling design determines the accuracy and efficiency of the pressure sensor core test.

[0003] At present, most of the pressure sensor core test fixtures use a single core test structure. Each test fixture can only test one sensor core at a time. If multiple pressure sensor cores are to be tested at the same time, multiple identical test fixtures must be used, resulting in low test efficiency. What is more serious is that due to the use of multiple single core test fixtures, there are a lot of intake pipe joints, and multiple joints need to be connected in series and parallel, with stress between them. The temperature of the pressure sensor core test can be as low as -40°C and as high as 125°C. Due to the large number of intake pipe joints and the stress between them, the intake pipe joints may leak, which in turn affects the test accuracy of the pressure sensor core and may even cause the failure of the entire test.

[0004] In order to solve the above problems, it is necessary to develop a six-pack sensor rapid test accuracy tooling to achieve the purpose of fast and accurate testing. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides a six-pack rapid testing precision tooling for sensors, which solves the problems of low testing efficiency and insufficient testing precision of sensor testing tooling in the prior art.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: a six-pack rapid testing precision tooling for sensors, including a fixing seat, a pressurized air intake pipe, two groups of cover plates and six groups of sensor bodies, the sensor body consisting of a detection end and a pin end arranged at one axial end of the detection end, the diameter of the pin end is smaller than the diameter of the detection end, the two groups of cover plates are respectively arranged at the upper and lower ends of the fixing seat, the six groups of sensor bodies are respectively arranged at the upper and lower ends of the fixing seat and are respectively fixed by a group of cover plates, the two groups of cover plates are detachably connected to the fixing seat through four groups of screws, the fixing seat is provided with an air intake hole that passes through the right wall of the fixing seat, the upper and lower ends of the fixing seat are both provided with four groups of height limiting columns for controlling the distance between the cover plate and the fixing seat, and the multiple groups of height limiting columns are respectively close to the four corners of the fixing seat under the top projection, the cover plate and the fixing seat are both left-right symmetrical with the left-right center line as the center, and the cover plate and the fixing seat are both front-to-back symmetrical with the front-to-back center line as the center.

[0007] Preferably, three groups of detection holes are provided on the upper wall and the lower wall of the fixing seat, and the three groups of detection holes located on the same side of the six groups of detection holes are equally spaced in the left-right direction. The detection end of the sensor body is slidably connected to the inner wall of the detection hole, and a sealing structure for sealing is provided between the detection end and the inner wall of the detection hole. Three groups of wear-resistant sleeves are provided on the inner wall of the cover plate, and the three groups of wear-resistant sleeves are distributed on the left and right and are respectively opposite to the three groups of detection holes up and down, and the inner walls of the three groups of wear-resistant sleeves are all provided with mounting holes that pass through from top to bottom, and the outer wall of the pin end of the sensor body is slidably connected to the inner wall of the mounting hole.

[0008] Preferably, four groups of positioning pins are provided on the side of the cover plate facing the fixed seat, and the height limiting column and the inner wall of the fixed seat are provided with positioning holes which pass through from top to bottom. The outer walls of the four groups of positioning pins are respectively slidably connected with the inner walls of the four groups of positioning holes, and the axial length of the positioning pins is greater than the axial length of the detection end of the sensor body.

[0009] Preferably, the positioning pin and the cover plate are jointly provided with a through hole which passes through from top to bottom. When the two groups of cover plates are connected to the fixing seat, the screw rod sequentially passes through the through holes on the inner walls of the two groups of cover plates and the upper and lower ends of the screw rod respectively extend toward the opposite sides of the two groups of cover plates. The upper and lower ends of the screw rod are respectively threadedly connected with a first nut and a second nut.

[0010] Preferably, the sealing structure includes multiple groups of sealing rings, which are distributed in sequence on the inner wall of the detection hole along the axial direction of the detection hole, and the inner walls of the multiple groups of sealing rings are slidingly connected to the outer wall of the detection end, and the detection hole and the detection end are sealed by the multiple groups of sealing rings.

[0011] Preferably, the upper wall of the cover plate is parallel to the lower wall, and the axis center line of the positioning pin and the axis center line of the mounting hole are both perpendicular to the lower wall of the cover plate.

[0012] Preferably, the upper wall of the fixing seat is parallel to the lower wall, and the axis line of the detection hole and the axis line of the positioning hole are both perpendicular to the upper wall of the fixing seat.

[0013] Preferably, an inner side wall of one end of the air inlet hole close to the left wall of the fixing seat is provided with an internal thread, and the air inlet hole is threadedly connected to the pressurized air inlet pipe through the internal thread.

[0014] Preferably, a connecting hole is provided at one end of the detection hole facing the air inlet hole, and the detection hole is connected with the air inlet hole through the connecting hole.

[0015] Preferably, the edge of one end of the positioning pin away from the cover plate, the edge of the detection hole, the edge of the positioning hole and the edge of the mounting hole are all provided with arc chamfers.

[0016] The present invention provides a six-pack sensor rapid test accuracy tooling, which has the following beneficial effects:

[0017] 1. Compared with the prior art, the six-unit rapid test precision tooling of the sensor has six sets of sensor bodies respectively plugged into the mounting holes on the two sets of cover plates. When the cover plates are connected to the fixing seats, the sensor bodies are driven to be inserted into the detection holes, and then four screws are used for through-fixing, which provides fixing force for the sensor bodies during pressure testing. Six sensor bodies can be clamped at one time and tested using the same air inlet hole, which effectively improves the test efficiency and test accuracy.

[0018] 2. Compared with the prior art, the axial length of the positioning pin of the six-unit rapid test precision tooling of the sensor is greater than the length of the detection end of the sensor body, so that when the cover plate is installed toward the fixed plate, the contact between the positioning pin and the positioning hole precedes the contact between the detection end and the detection hole. The positioning pin and the positioning hole cooperate to position the detection end when it is inserted into the detection hole, thereby effectively improving the installation accuracy.

[0019] 3. Compared with the prior art, the six-unit rapid test precision tooling of the sensor has arc chamfers on the edge of the end of the locating pin away from the cover plate, the edge of the detection hole, the edge of the locating hole and the edge of the mounting hole. The mating parts do not need to be fully aligned when they are plugged into each other. The arc chamfers can effectively improve the installation speed. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the structure of the present invention;

[0021] Figure 2 It is a schematic diagram of the internal cross-section of the overall structure of the present invention;

[0022] Figure 3 For the present invention Figure 2 A partial enlarged view of the middle A;

[0023] Figure 4 It is a partial cross-sectional view of the connection structure of the fixing seat, the height-limiting column and the cover plate of the present invention;

[0024] Figure 5 It is a partial cross-sectional view of the internal structure of the fixing seat and the height-limiting column of the present invention;

[0025] Figure 6 It is a partial cross-sectional view of the cover plate and positioning pin connection structure of the present invention;

[0026] Figure 7 It is a partial cross-sectional view of the internal structure of the cover plate of the present invention.

[0027] Among them, 1. fixing seat; 2. cover plate; 3. height limiting column; 4. air inlet hole; 5. screw; 6. first nut; 7. second nut; 8. wear-resistant sleeve; 9. pin end; 10. detection end; 11. detection hole; 12. connecting hole; 13. sealing ring; 14. positioning pin; 15. positioning hole; 16. through hole; 17. installation hole. DETAILED DESCRIPTION

[0028] 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.

[0029] Example:

[0030] like Figures 1 to 7 As shown, the embodiment of the present invention provides a six-pack rapid test precision tooling for sensors, including a fixing seat 1, a pressurized air inlet pipe, two groups of cover plates 2 and six groups of sensor bodies, the sensor body consisting of a detection end 10 and a pin end 9 arranged at one axial end of the detection end 10, the diameter of the pin end 9 is smaller than the diameter of the detection end 10, the fixing seat 1 is provided with an air inlet hole 4 penetrating the right wall of the fixing seat 1, the inner side wall of the air inlet hole 4 close to the left wall of the fixing seat 1 is provided with an internal thread, the air inlet hole 4 is threadedly connected with the pressurized air inlet pipe through the internal thread, the two groups of cover plates 2 are respectively arranged at the upper and lower ends of the fixing seat 1, the six groups of sensor bodies are respectively arranged at the upper and lower ends of the fixing seat 1 and are respectively fixed by a group of cover plates 2, the two groups of cover plates 2 are detachably connected to the fixing seat 1 by four groups of screws 5, the six groups of sensor bodies are fixed to the fixing seat 1 by the two groups of cover plates 2, the inside of the air inlet hole 4 is pressurized by the pressurized air inlet pipe, and then the six groups of sensor bodies are pressure tested at the same time, effectively improving the test efficiency and the test accuracy;

[0031] In order to facilitate the assembly between the cover plate 2 and the fixing seat 1, four groups of height-limiting columns 3 for controlling the distance between the cover plate 2 and the fixing seat 1 are arranged at the upper end and the lower end of the fixing seat 1, and the multiple groups of height-limiting columns 3 are respectively close to the four corners of the fixing seat 1 in a top-down projection. The cover plate 2 and the fixing seat 1 are both left-right symmetrical with the left-right center line as the center, and the cover plate 2 and the fixing seat 1 are both front-to-back symmetrical with the front-to-back center line as the center. Through the symmetrical arrangement, any one of the two groups of cover plates 2 can be assembled with the upper wall or the lower wall of the fixing seat 1 smoothly, and the cover plate 2 can be smoothly assembled with the fixing seat 1 after being rotated 180 degrees in the top-down direction, so that there is no need to pay special attention to the installation direction during assembly, which greatly improves the assembly speed;

[0032] In order to install the sensor body, three groups of detection holes 11 are provided on the upper wall and the lower wall of the fixing seat 1. The three groups of detection holes 11 located on the same side of the six groups of detection holes 11 are evenly spaced in the left and right directions. The detection end 10 of the sensor body is slidably connected to the inner wall of the detection hole 11. The inner wall of the cover plate 2 is provided with three groups of wear-resistant sleeves 8. The three groups of wear-resistant sleeves 8 are distributed left and right and are respectively opposite to the three groups of detection holes 11 up and down. The inner walls of the three groups of wear-resistant sleeves 8 are provided with mounting holes 17 that pass through from top to bottom. The outer wall of the pin end 9 of the sensor body is slidably connected to the inner wall of the mounting hole 17. The detection hole 11 is provided at one end facing the air inlet 4. A connecting hole 12 is provided, and the detection hole 11 is connected with the air inlet 4 through the connecting hole 12. When assembling, the pin end 9 of the sensor body is inserted into the mounting hole 17, and the detection end 10 of the sensor body and the positioning pin 14 are kept on the same side. After the sensor body is inserted into the three mounting holes 17 on a set of cover plates 2, the cover plate 2 can be assembled toward the fixing seat 1. When testing, the end of the detection end 10 of the sensor body connected to the pin end 9 is abutted against the side of the cover plate 2 facing the fixing seat 1, and the cover plate 2 plays a role of pressing the sensor body tightly to prevent the sensor body from being separated from the detection hole 11 during the pressure test;

[0033] In order to facilitate the assembly of the cover plate 2 and the fixing seat 1, four groups of positioning pins 14 are provided on the side of the cover plate 2 facing the fixing seat 1, and the inner wall of the height limiting column 3 and the fixing seat 1 is provided with positioning holes 15 that penetrate up and down. The outer walls of the four groups of positioning pins 14 are respectively slidably connected with the inner side walls of the four groups of positioning holes 15. The positioning pins 14 and the cover plate 2 are jointly provided with through holes 16 that penetrate up and down. When the two groups of cover plates 2 are connected to the fixing seat 1, the screw rods 5 sequentially penetrate the through holes 16 on the inner walls of the two groups of cover plates 2, and the upper and lower ends of the screw rods 5 extend toward the opposite sides of the two groups of cover plates 2, and the upper and lower ends of the screw rods 5 are respectively threadedly connected with the first A nut 6, a second nut 7, the upper wall of the cover plate 2 is parallel to the lower wall, the axis of the positioning pin 14 and the axis of the mounting hole 17 are both perpendicular to the lower wall of the cover plate 2, the upper wall of the fixing seat 1 is parallel to the lower wall, the axis of the detection hole 11 and the axis of the positioning hole 15 are both perpendicular to the upper wall of the fixing seat 1, when the cover plate 2 is assembled with the fixing seat 1, the four groups of positioning pins 14 are inserted into the four groups of positioning holes 15, and then the cover plate 2 is pushed close to the fixing seat 1 until the cover plate 2 is tightly pressed against the height-limiting column 3, the cooperation of the positioning pin 14 and the positioning hole 15 can position the detection end 10 when it is inserted into the detection hole 11, ensuring smooth installation;

[0034] In order to make the positioning pin 14 play a positioning role, the axial length of the positioning pin 14 is greater than the axial length of the detection end 10 of the sensor body. By controlling the length, during assembly, the positioning pin 14 is first inserted into the positioning hole 15 to constrain the relative position between the cover plate 2 and the fixing seat 1 in the front, back, left and right directions. Then, when the cover plate 2 is pushed toward the fixing seat 1, it can be ensured that the detection end 10 is smoothly inserted into the detection hole 11;

[0035] In order to improve the assembly speed, the edge of the end of the positioning pin 14 away from the cover plate 2, the edge of the detection hole 11, the edge of the positioning hole 15 and the edge of the installation hole 17 are all provided with arc chamfers, which can effectively reduce the time of aligning the position during assembly and improve the installation speed;

[0036] In order to maintain sealing during detection, a sealing structure for sealing is arranged between the detection end 10 and the inner wall of the detection hole 11, and the sealing structure includes multiple groups of sealing rings 13, and the multiple groups of sealing rings 13 are sequentially distributed along the axial direction of the detection hole 11 on the inner wall of the detection hole 11, and the inner walls of the multiple groups of sealing rings 13 are slidingly connected with the outer wall of the detection end 10. The detection hole 11 and the detection end 10 are sealed by the multiple groups of sealing rings 13. Through the multiple groups of sealing rings 13, the detection hole 11 and the detection end 10 are kept sealed after the pressurized air intake pipe pressurizes the inside of the air intake hole 4, thereby improving the detection accuracy.

[0037] Working principle: six groups of sensor bodies are fixed on the fixing seat 1 through two groups of cover plates 2, and the air inlet hole 4 is pressurized through the pressurized air inlet pipe, so as to perform pressure test on the six groups of sensor bodies at the same time, which effectively improves the test efficiency and the test accuracy; through the symmetrical setting, any one of the two groups of cover plates 2 can be assembled with the upper wall or the lower wall of the fixing seat 1 smoothly, and the cover plate 2 can be smoothly assembled with the fixing seat 1 after rotating 180 degrees in the top view, so that there is no need to pay special attention to the installation direction during assembly, which greatly improves the assembly speed; during assembly, the pin end 9 of the sensor body is inserted into the mounting hole 17, and the detection end 10 of the sensor body and the positioning pin 14 are kept on the same side. After the three mounting holes 17 on a group of cover plates 2 are all inserted into the inside of the sensor body, the cover plate 2 can be assembled toward the fixing seat 1. During the test, the end of the sensor body where the detection end 10 is connected to the pin end 9 abuts against the side of the cover plate 2 facing the fixing seat 1, and the cover plate 2 plays a role in pressing the sensor body tightly to avoid pressure testing. When the sensor body is separated from the detection hole 11; when the cover plate 2 is assembled with the fixing seat 1, the four groups of positioning pins 14 are inserted into the four groups of positioning holes 15, and then the cover plate 2 is pushed close to the fixing seat 1 until the cover plate 2 is tightly against the height limit column 3. The cooperation of the positioning pins 14 and the positioning holes 15 can position the detection end 10 when it is inserted into the detection hole 11 to ensure smooth installation; during the assembly process, the positioning pins 14 are first inserted into the positioning holes 15 to constrain the relative position between the cover plate 2 and the fixing seat 1 in the front, back, left and right directions, and then when the cover plate 2 is pushed toward the fixing seat 1, it can be ensured that the detection end 10 is smoothly inserted into the detection hole 11; the edge of the positioning pin 14 away from the end of the cover plate 2, the edge of the detection hole 11, the edge of the positioning hole 15 and the edge of the mounting hole 17 are all provided with arc chamfers, and the arc chamfers can effectively reduce the time for aligning the position during assembly, improve the installation speed, and keep the pressurized air intake pipe pressurized to the inside of the air intake hole 4 through multiple groups of sealing rings 13. After the detection hole 11 and the detection end 10 are kept sealed, the detection accuracy is improved.

[0038] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. The sensor six-pack rapid test accuracy tooling is characterized by: The invention comprises a fixing seat (1), a pressurized air intake pipe, two groups of cover plates (2) and six groups of sensor bodies, wherein the sensor body comprises a detection end (10) and a pin end (9) arranged at one axial end of the detection end (10), wherein the diameter of the pin end (9) is smaller than the diameter of the detection end (10), the two groups of cover plates (2) are respectively arranged at the upper and lower ends of the fixing seat (1), the six groups of sensor bodies are respectively arranged at the upper and lower ends of the fixing seat (1) and are respectively fixed by a group of cover plates (2), and the two groups of cover plates (2) are connected to the fixing seat (1) through four groups of screw rods (5). ) are detachably connected, the fixing seat (1) is provided with an air inlet hole (4) penetrating the right wall of the fixing seat (1), the upper end and the lower end of the fixing seat (1) are provided with four groups of height-limiting columns (3) for controlling the distance between the cover plate (2) and the fixing seat (1), and the plurality of groups of height-limiting columns (3) are respectively close to the four corners of the fixing seat (1) when viewed from above, the cover plate (2) and the fixing seat (1) are both symmetrical about the left and right center line, and the cover plate (2) and the fixing seat (1) are both symmetrical about the front and rear center line.

2. The six-pack rapid test accuracy tooling for sensors according to claim 1 is characterized by: The upper wall and the lower wall of the fixing seat (1) are both provided with three groups of detection holes (11), and the three groups of detection holes (11) located on the same side of the six groups of detection holes (11) are distributed at equal intervals in the left-right direction. The detection end (10) of the sensor body is slidably connected to the inner wall of the detection hole (11), and a sealing structure for sealing is provided between the detection end (10) and the inner wall of the detection hole (11). The inner wall of the cover plate (2) is provided with three groups of wear-resistant sleeves (8), and the three groups of wear-resistant sleeves (8) are distributed on the left and right and are respectively opposite to the three groups of detection holes (11) in the upper and lower directions. The inner walls of the three groups of wear-resistant sleeves (8) are all provided with mounting holes (17) that penetrate from top to bottom, and the outer wall of the pin end (9) of the sensor body is slidably connected to the inner wall of the mounting hole (17).

3. The six-pack rapid test accuracy tooling for sensors according to claim 2 is characterized by: Four groups of positioning pins (14) are arranged on one side of the cover plate (2) facing the fixing seat (1), and positioning holes (15) are arranged on the inner walls of the height limiting column (3) and the fixing seat (1) and are penetrated vertically, and the outer walls of the four groups of positioning pins (14) are respectively slidably connected to the inner walls of the four groups of positioning holes (15), and the axial length of the positioning pins (14) is greater than the axial length of the detection end (10) of the sensor body.

4. The six-pack rapid test accuracy tooling for sensors according to claim 3 is characterized by: The positioning pin (14) and the cover plate (2) are jointly provided with a through hole (16) which passes through from top to bottom. When the two groups of cover plates (2) are connected to the fixing seat (1), the screw rod (5) passes through the through holes (16) on the inner walls of the two groups of cover plates (2) in sequence, and the upper and lower ends of the screw rod (5) extend toward the opposite sides of the two groups of cover plates (2). The upper and lower ends of the screw rod (5) are respectively threadedly connected with a first nut (6) and a second nut (7).

5. The six-pack rapid test accuracy tooling for sensors according to claim 4 is characterized by: The sealing structure comprises a plurality of sealing rings (13), the plurality of sealing rings (13) being sequentially arranged on the inner wall of the detection hole (11) along the axial direction of the detection hole (11), the inner walls of the plurality of sealing rings (13) being slidably connected to the outer wall of the detection end (10), and the detection hole (11) and the detection end (10) being sealed by the plurality of sealing rings (13).

6. The six-pack rapid test accuracy tooling for sensors according to claim 5 is characterized by: The upper wall of the cover plate (2) is parallel to the lower wall, and the axis center line of the positioning pin (14) and the axis center line of the mounting hole (17) are both perpendicular to the lower wall of the cover plate (2).

7. The six-pack rapid test accuracy tooling for sensors according to claim 6 is characterized by: The upper wall of the fixing seat (1) is parallel to the lower wall, and the axis center line of the detection hole (11) and the axis center line of the positioning hole (15) are both perpendicular to the upper wall of the fixing seat (1).

8. The six-pack rapid test accuracy tooling for sensors according to claim 7 is characterized by: An inner side wall of one end of the air inlet hole (4) close to the left wall of the fixing seat (1) is provided with an internal thread, and the air inlet hole (4) is threadedly connected to the pressurized air inlet pipe via the internal thread.

9. The six-pack rapid test accuracy tooling for sensors according to claim 8 is characterized by: A connecting hole (12) is provided at one end of the detection hole (11) facing the air inlet hole (4), and the detection hole (11) is connected to the air inlet hole (4) through the connecting hole (12).

10. The six-pack rapid test accuracy tooling for sensors according to claim 9 is characterized by: The edge of one end of the positioning pin (14) away from the cover plate (2), the edge of the detection hole (11), the edge of the positioning hole (15) and the edge of the mounting hole (17) are all provided with circular arc chamfers.

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