High-fitting pressure sensor test clamp

Abstract

The utility model relates to the technical field of pressure sensor clamps, and discloses a high-fitting pressure sensor testing clamp which comprises a base, a placing table is movably arranged at the top of the base, a through groove is formed in the top of the placing table, a clamping assembly is arranged in the placing table, and the clamping assembly comprises a rotating shaft arranged in the placing table. The lower end of the rotating shaft is connected with a second motor, the rotating shaft is sleeved with a driving gear, gear racks are arranged on the two sides of the driving gear respectively, connecting rods are installed on the tops of the gear racks, the upper ends of the connecting rods penetrate through the through grooves to extend to the position above the containing table and are connected with clamping plates, and the clamping plates on the gear racks on the two sides of the driving gear are arranged in a staggered mode. The to-be-tested pressure sensor is fixed through the clamping assembly, the situation that the test result is affected due to the fact that the pressure sensor is unstable in the test process is avoided, and the problems that an existing pressure sensor test clamp is manually pressed, fixing is not firm, and only one pressure sensor can be detected at a time are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of pressure sensor fixtures, in particular to a fixture for testing a pressure sensor with high fit. Background Art

[0002] A pressure sensor is a device or apparatus that can sense pressure signals and convert them into usable output electrical signals according to certain rules. A pressure sensor is usually composed of a pressure sensitive element and a signal processing unit. According to different test pressure types, pressure sensors can be divided into gauge pressure sensors, differential pressure sensors and absolute pressure sensors. Pressure sensors are the most commonly used sensors in industrial practice. They are widely used in various industrial automatic control environments, involving water conservancy and hydropower, railway transportation, intelligent buildings, production automatic control, aerospace, military industry, petrochemicals, oil wells, electric power, ships, machine tools, pipelines and many other industries.

[0003] Pressure sensors need to be fixed with fixtures during product testing, but the fixtures of conventional testing machines are mostly fixed structures. Product testing requires testing of products of different specifications, which makes the testing process more cumbersome. The test fixtures often require technicians to manually tighten them, which can easily cause the sensor to be unreliably fixed and the test data to be inaccurate. In addition, only one pressure sensor can be tested at a time, and the detection efficiency is low.

[0004] Therefore, in order to solve such problems, we proposed a test fixture for pressure sensors with high fit. Utility Model Content

[0005] The purpose of the utility model is to provide a pressure sensor testing fixture with high fit, aiming to solve the problem in the above-mentioned background technology that the existing pressure sensor testing fixture often requires technicians to manually tighten it, which can easily cause the sensor to be unreliably fixed during tightening, the test data to be inaccurate, and only one pressure sensor can be tested at a time, resulting in low detection efficiency.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a test fixture for a pressure sensor with high fit, comprising a base, a support plate is arranged on one side above the base, a pressure measuring assembly is installed on the support plate, a placing table is movably arranged on the top of the base, the inside of the placing table is hollow, a through groove is opened on the top of the placing table, and a clamping assembly is arranged inside the placing table;

[0007] The clamping assembly includes a rotating shaft arranged inside the placement table, the lower end of the rotating shaft is connected to motor 2, the outside of the rotating shaft is fixedly sleeved with a driving gear, gear bars are respectively arranged on both sides of the driving gear, the gear bars are movably arranged inside the placement table, a connecting rod is installed on the top of the gear bar, the upper end of the connecting rod passes through the through slot and extends to above the placement table, the top of the connecting rod is connected to a clamping plate, and the clamping plates on the gear bars on both sides of the driving gear are staggered.

[0008] Preferably, the pressure measuring assembly includes a motor 1 fixedly mounted on the top of the support plate, the output end of the motor 1 is connected to a screw rod, the lower end of the screw rod passes through the support plate and is rotatably arranged on the base, the outer spiral sleeve of the screw rod is connected to a sleeve column, one side of the sleeve column is fixedly connected to a movable plate, and the lower end of the movable plate is connected to a pressure testing plate through a pressure relief piece.

[0009] Preferably, the pressure relief member comprises a positioning telescopic rod plugged into the bottom side of the movable plate, the lower end of the positioning telescopic rod is connected to a pressure testing plate, and a pressure relief spring is sleeved on the outside of the positioning telescopic rod.

[0010] Preferably, sliding rods are movably provided on both sides of the movable plate, the upper ends of the sliding rods are connected to the supporting plates, and the lower ends of the sliding rods are installed on the base.

[0011] Preferably, a slide groove is provided on the inner bottom side of the placement platform, a moving block is movably provided inside the slide groove, and the upper end of the moving block is connected to the gear bar.

[0012] Preferably, a mounting groove is provided inside the base, an electric guide rail is provided inside the mounting groove, a slider is movably provided outside the electric guide rail, and the top of the slider is connected to the top of the placement table.

[0013] The utility model has the following beneficial effects:

[0014] In the utility model, firstly, the clamping plates on the two gear bars are staggered and arranged in multiple groups, so as to facilitate the testing of multiple pressure sensors at one time and improve the efficiency. The second motor controls the rotation of the driving gear on the rotating shaft and transmits the movement of the two gear bars. The two gear bars move synchronously relative to each other, so that the relative clamping plates are close to each other and the pressure sensor in the middle is clamped and fixed. The device can adapt to the testing of pressure sensors of different specifications, so that the detection process is easy to operate, and the problem of unreliable fixation of the sensor due to manual pressing is avoided, thereby ensuring the accuracy of the test data. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A three-dimensional schematic diagram of a high-fit pressure sensor test fixture proposed by the utility model Figure 1 ;

[0016] Figure 2A three-dimensional schematic diagram of a high-fit pressure sensor test fixture proposed by the utility model Figure 2 ;

[0017] Figure 3 This is a schematic plan view of a test fixture for a pressure sensor with high fit proposed by the utility model;

[0018] Figure 4 A three-dimensional exploded diagram of a clamping assembly in a clamp for testing a pressure sensor with high fit proposed by the utility model Figure 1 ;

[0019] Figure 5 A three-dimensional exploded diagram of a clamping assembly in a clamp for testing a pressure sensor with high fit proposed by the utility model Figure 2 .

[0020] Legend:

[0021] 1. Base; 2. Support plate; 3. Pressure measuring assembly; 31. Motor 1; 32. Screw rod; 33. Sleeve column; 34. Moving plate; 35. Pressure relief piece; 351. Positioning telescopic rod; 352. Pressure relief spring; 36. Pressure test plate; 4. Slide bar; 5. Placement table; 51. Through slot; 6. Clamping assembly; 61. Rotating shaft; 62. Motor 2; 63. Driving gear; 64. Gear bar; 65. Connecting rod; 66. Clamping plate; 7. Slide slot; 71. Moving block; 8. Mounting slot; 9. Electric guide rail; 91. Slider. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] In the description of the present utility model, it should be noted that the orientation or position relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. The terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In addition, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection. It can be a mechanical connection or an electrical connection. It can be directly connected, or indirectly connected through an intermediate medium, or it can be a communication between the two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0024] Reference Figure 1-5 The utility model provides an embodiment: a fixture for testing a pressure sensor with high fit, comprising a base 1, a support plate 2 is arranged on one side above the base 1, the support plate 2 is inverted L-shaped, a pressure measuring assembly 3 is installed on the support plate 2, the pressure sensor is tested by the pressure measuring assembly 3, a placing table 5 is movably arranged on the top of the base 1, for placing the pressure sensor to be tested, the interior of the placing table 5 is hollow, a through groove 51 is opened on the top of the placing table 5, a clamping assembly 6 is arranged inside the placing table 5, the pressure sensor to be tested is fixed by the clamping assembly 6, so as to avoid the pressure sensor being unstable during the test and affecting the test result;

[0025] The clamping assembly 6 includes a rotating shaft 61 arranged inside the placing table 5, the rotating shaft 61 is vertically arranged inside the placing table 5, the lower end of the rotating shaft 61 is connected to the motor 2 62, the outer part of the rotating shaft 61 is fixedly sleeved with a driving gear 63, and gear bars 64 are respectively arranged on both sides of the driving gear 63. The gear bars 64 are symmetrically arranged in two groups in parallel, and the driving gear 63 is meshed with the two gear bars 64. The gear bars 64 are movably arranged inside the placing table 5, and the tops of the two gear bars 64 are both installed with connecting rods 65, and the upper ends of the connecting rods 65 extend through the through slot 51. To the top of the placement table 5, the top of the connecting rod 65 is connected to a clamping plate 66. The clamping plates 66 on the two gear bars 64 are staggered and arranged in multiple groups, which is convenient for testing multiple pressure sensors at one time and improving efficiency. The pressure sensor is placed between the clamping plates 66 on different gear bars 64, and the driving gear 63 on the rotating shaft 61 is controlled to rotate by the motor 2 62. The driving gear 63 drives the two gear bars 64 to move, and the two gear bars 64 move synchronously relative to each other, so that the relative clamping plates 66 are close to each other, clamping and fixing the pressure sensor in the middle.

[0026] The pressure measuring assembly 3 includes a motor 31 fixedly mounted on the top of the support plate 2, the output end of the motor 31 is connected to a screw rod 32, the lower end of the screw rod 32 passes through the support plate 2, and is rotatably arranged on the base 1, the outer spiral sleeve of the screw rod 32 is connected with a sleeve column 33, one side of the sleeve column 33 is fixedly connected to a movable plate 34, the lower end of the movable plate 34 is connected to a pressure testing plate 36 through a pressure relief member 35, and the pressure testing plate 36 is located above the placement table 5, and the screw rod 32 is controlled to rotate by the motor 31 to make the sleeve column 33 move down along the screw rod 32 until it is pressed against the pressure sensor for testing.

[0027] The pressure relief member 35 includes a positioning telescopic rod 351 inserted into the bottom side of the movable plate 34. The positioning telescopic rod 351 is symmetrically arranged in two groups. The lower end of the positioning telescopic rod 351 is connected to the pressure test plate 36. The outer sleeve of the positioning telescopic rod 351 is provided with a pressure relief spring 352. One end of the pressure relief spring 352 is connected to the movable plate 34, and the other end of the pressure relief spring 352 is installed on the pressure test plate 36. When the pressure test plate 36 contacts the pressure sensor, the positioning telescopic rod 351 and the pressure relief spring 352 are squeezed and contracted to generate elastic force, so that an elastic connection is formed between the pressure test plate 36 and the movable plate 34, thereby preventing damage to the pressure sensor caused by excessive pressure, and having higher safety.

[0028] Slide rods 4 are movably provided on both sides of the movable plate 34, the upper ends of the slide rods 4 are connected to the support plate 2, and the lower ends of the slide rods 4 are installed on the base 1. The slide rods 4 limit the movable plate 34 and can play a role in positioning and supporting the displacement of the movable plate 34.

[0029] A slide groove 7 is provided on the inner bottom side of the placement table 5, and a moving block 71 is movably provided inside the slide groove 7. The upper end of the moving block 71 is connected to the gear bar 64. When the gear bar 64 moves, the moving block 71 moves along the slide groove 7 to limit the gear bar 64 and ensure the smooth operation of the gear bar 64.

[0030] An installation groove 8 is provided inside the base 1, and an electric guide rail 9 is provided inside the installation groove 8. A slider 91 is movably provided outside the electric guide rail 9. The top of the slider 91 is connected to the top of the placement table 5. The electric guide rail 9 controls the movement of the slider 91 to make the placement table 5 move laterally on the base 1. The pressure sensor on the placement table 5 can be tested multiple times to avoid the pressure test plate 36 failing to fully cover the pressure sensor, resulting in an error in the test structure.

[0031] Working principle: first, place the pressure sensor on the placement table 5 between the clamping plates 66 on different gear bars 64, and control the rotation of the driving gear 63 on the rotating shaft 61 through the motor 2 62. The driving gear 63 drives the two gear bars 64 to move. The two gear bars 64 move synchronously relative to each other, so that the relative clamping plates 66 are close to each other and the pressure sensor in the middle is clamped and fixed. The motor 1 31 controls the rotation of the screw rod 32 to move the sleeve column 33 down along the screw rod 32 until it is pressed against the pressure sensor for testing. The electric guide rail 9 controls the movement of the slider 91 to make the placement table 5 move horizontally on the base 1. The pressure sensor on the placement table 5 can be tested multiple times to ensure the accuracy of the test structure.

[0032] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A test fixture for a pressure sensor with high conformability, comprising a base (1), characterized in that: A support plate (2) is provided on one side above the base (1), a pressure measuring assembly (3) is mounted on the support plate (2), a placement platform (5) is movably provided on the top of the base (1), the interior of the placement platform (5) is hollow, a through groove (51) is provided on the top of the placement platform (5), and a clamping assembly (6) is provided inside the placement platform (5); The clamping assembly (6) comprises a rotating shaft (61) arranged inside the placing platform (5), the lower end of the rotating shaft (61) is connected to a second motor (62), the outer portion of the rotating shaft (61) is fixedly sleeved with a driving gear (63), gear bars (64) are respectively arranged on both sides of the driving gear (63), the gear bars (64) are movably arranged inside the placing platform (5), a connecting rod (65) is installed on the top of the gear bar (64), the upper end of the connecting rod (65) passes through the through slot (51) and extends to the top of the placing platform (5), the top end of the connecting rod (65) is connected to a clamping plate (66), and the clamping plates (66) on the gear bars (64) on both sides of the driving gear (63) are staggered.

2. The test fixture for a pressure sensor with high conformability according to claim 1, characterized in that: The pressure measuring assembly (3) comprises a motor (31) fixedly mounted on the top of a support plate (2); the output end of the motor (31) is connected to a screw rod (32); the lower end of the screw rod (32) passes through the support plate (2) and is rotatably arranged on the base (1); the outer spiral sleeve of the screw rod (32) is connected to a sleeve column (33); one side of the sleeve column (33) is fixedly connected to a movable plate (34); the lower end of the movable plate (34) is connected to a pressure testing plate (36) via a pressure relief member (35).

3. The test fixture for a pressure sensor with high conformability according to claim 2, characterized in that: The pressure relief member (35) comprises a positioning telescopic rod (351) plugged into the bottom side of the movable plate (34), the lower end of the positioning telescopic rod (351) is connected to a pressure testing plate (36), and a pressure relief spring (352) is sleeved on the outside of the positioning telescopic rod (351).

4. The test fixture for a pressure sensor with high conformability according to claim 2, characterized in that: Sliding rods (4) are movably provided on both sides of the movable plate (34), the upper ends of the sliding rods (4) are connected to the supporting plate (2), and the lower ends of the sliding rods (4) are installed on the base (1).

5. The test fixture for a pressure sensor with high conformability according to claim 1, characterized in that: A slide groove (7) is provided on the inner bottom side of the placement platform (5), and a moving block (71) is movably provided inside the slide groove (7), and the upper end of the moving block (71) is connected to the gear bar (64).

6. The test fixture for a pressure sensor with high conformability according to claim 1, characterized in that: The base (1) is provided with a mounting groove (8) inside, an electric guide rail (9) is provided inside the mounting groove (8), a slider (91) is movably provided outside the electric guide rail (9), and the top of the slider (91) is connected to the top of the placement platform (5).

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