Pressure sensor metering test fixture

Abstract

The utility model discloses a pressure sensor metering test fixture, which relates to the technical field of pressure sensor production, and comprises a turntable, a servo motor is arranged at the lower part in the turntable, the output end of the servo motor is connected with a speed reducer, and the output end of the speed reducer is connected with the turntable; a fixed clamp is connected to the top of the turntable, a screw penetrates through the outer surface of the turntable, and a movable clamp is connected to the top of the screw through a sliding block; a bracket penetrates through one side of the top of the turntable. According to the utility model, through the arrangement of the servo motor, the speed reducer and the turntable and the arrangement of a plurality of groups of clamping mechanisms, other pressure sensors can be clamped while one pressure sensor is detected, and the clamping time and the detection time are overlapped, so that the overall detection working time consumed by clamping and replacing the pressure sensors is reduced, and the detection efficiency is improved; the multiple sets of clamping mechanisms alternately work and conduct clamping work, and the detection efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of pressure sensor manufacturing technology, specifically a pressure sensor measurement and testing fixture. Background Technology

[0002] Pressure sensors typically consist of a pressure-sensitive element and a signal processing unit. Based on different test pressure types, pressure sensors can be classified into gauge pressure sensors, differential pressure sensors, and absolute pressure sensors. They are widely used in various industrial automation environments, encompassing numerous industries such as water conservancy and hydropower, railway transportation, intelligent buildings, production automation, aerospace, military, petrochemicals, oil wells, power, shipbuilding, machine tools, and pipelines.

[0003] After the pressure sensor is manufactured, it needs to be tested and calibrated. For example, a certain pressure is applied to the pressure-sensitive element of the pressure sensor, and then the current, voltage or electrical signal output by the pressure sensor is detected. After conversion, it is checked whether it corresponds to the applied pressure. During the pressure application process, in order to prevent the pressure sensor from moving, a fixture is usually set to limit it.

[0004] Existing pressure sensor measurement and testing fixtures are generally divided into manual fixtures and automatic fixtures. Automatic fixtures are usually used in automated production lines, while manual fixtures are usually used in manual inspection operations such as assembly lines. Manual fixtures require operators to manually lock or unlock the fixture before and after use, which will result in a certain time interval during the operation, thus delaying the inspection process by several minutes and affecting the inspection efficiency. Utility Model Content

[0005] Therefore, the purpose of this utility model is to provide a pressure sensor measurement and testing fixture to solve the technical problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a pressure sensor measurement and testing fixture, including a turntable, a servo motor is disposed inside the lower part of the turntable, and a reducer is connected to the output end of the servo motor, the output end of the reducer being connected to the turntable; a fixed fixture is connected to the top of the turntable, a lead screw passes through the outer surface of the turntable, and a movable fixture is connected to the top of the lead screw via a slider; a bracket passes through one side of the top of the turntable, and a gear shaft is connected inside the lower part of the bracket, a bevel gear is connected to the top of the gear shaft and the outside of the lead screw, and a rack is disposed inside the lower part of the turntable.

[0007] By adopting the above technical solution, during use, the operator places the pressure sensor to be tested in the gap between the fixed clamp and the movable clamp. Then, the operator rotates the lead screw clockwise, causing the lead screw to drive the slider to move. The slider's movement then drives the movable clamp to move, thus clamping the pressure sensor through the cooperation of the fixed and movable clamps, preventing the pressure sensor from moving during testing. Furthermore, at this time, the gear shaft does not contact the rack, allowing the gear shaft to rotate freely without being obstructed by the rack. By setting multiple clamping mechanisms, it is convenient to clamp other pressure sensors while testing one, overlapping the clamping and testing times, reducing the overall testing time consumed by clamping and changing pressure sensors, thereby improving testing efficiency. A servo motor and reducer drive the turntable to rotate counterclockwise, removing the tested pressure sensor from the testing mechanism and sending in the untested pressure sensor for easy operation. When the turntable rotates and removes the tested pressure sensor from the testing mechanism, the gear shaft of the clamping mechanism corresponding to this pressure sensor will contact the rack. The meshing of the gear shaft and rack is similar to the meshing of a gear and a gear ring, causing the gear shaft and a bevel gear to rotate horizontally counterclockwise. One bevel gear meshes with another bevel gear, causing the other bevel gear to rotate vertically counterclockwise, thereby driving the lead screw to rotate counterclockwise and releasing the movable clamp. The pressure sensor can be directly removed without the need for manual release of the clamp, making the operation simple, convenient and efficient.

[0008] Furthermore, the movable clamp is slidably connected to the turntable, and the slider is threadedly connected to the lead screw.

[0009] By adopting the above technical solution, the operator rotates the screw clockwise to move the movable clamp, thereby clamping the pressure sensor by the cooperation of the fixed clamp and the movable clamp, thus preventing the pressure sensor from moving during the detection process.

[0010] Furthermore, the slider has a "T" shaped cross-section and is slidably connected to the turntable.

[0011] By adopting the above technical solution, the staff rotates the lead screw clockwise, causing the lead screw to drive the slider to move.

[0012] Furthermore, the gear shaft meshes with the rack, and the two bevel gears mesh with each other.

[0013] By adopting the above technical solution, the gear shaft will contact the rack, causing the gear shaft and a bevel gear to rotate horizontally counterclockwise. One bevel gear meshes with another bevel gear, causing the other bevel gear to rotate vertically counterclockwise, thereby driving the lead screw to rotate counterclockwise and releasing the movable clamp.

[0014] Furthermore, the rack is arc-shaped and does not contact the turntable.

[0015] By adopting the above technical solution, the meshing of the gear shaft and the rack is similar to the meshing of the gear and the gear ring. The rack does not contact the turntable, firstly to avoid the rotation of the turntable causing the rack to move, and secondly to avoid the rotation of the turntable causing friction between the rack and the rack, resulting in wear and resistance.

[0016] Furthermore, multiple sets of the fixed clamp, movable clamp, lead screw, slider, bracket, gear shaft, and bevel gear are provided, and the multiple sets of fixed clamp, movable clamp, lead screw, slider, bracket, gear shaft, and bevel gear are distributed in a circular array.

[0017] By adopting the above technical solution and setting up multiple clamping mechanisms, it is convenient to clamp other pressure sensors while testing one pressure sensor. This overlaps the clamping time with the testing time, reducing the overall testing time consumed by clamping and replacing pressure sensors, thereby improving testing efficiency.

[0018] Furthermore, the output end of the reducer is provided with a thread, and the turntable is detachably connected to the output end of the reducer via a nut.

[0019] By adopting the above technical solution, the staff can remove the nut on the output end of the reducer to stop the rotation of the turntable, thus facilitating the replacement of the turntable; after the turntable is disassembled, the rack is exposed, and the staff can remove the bolts to replace the rack.

[0020] Furthermore, the fixed clamp is detachably connected to the turntable by bolts, and the movable clamp is detachably connected to the slider by bolts.

[0021] By adopting the above technical solution, the staff can replace the fixed clamp and the movable clamp by first removing the bolts on them.

[0022] Furthermore, the bracket is detachably connected to the turntable via bolts.

[0023] By adopting the above technical solution, the workers can remove the bolts on the bracket and pull out the lead screw and its external bearing laterally, thus replacing the lead screw, slider, bracket, gear shaft and bevel gear.

[0024] Furthermore, one end of the lead screw is provided with a handwheel and a thread, and the handwheel is detachably connected to the lead screw via a nut.

[0025] By adopting the above technical solution, the handwheel facilitates the rotation of the lead screw by the operator, and because the handwheel is a detachable structure, it avoids interference when replacing the clamping mechanism after it is damaged.

[0026] In summary, the present invention has the following main advantages:

[0027] 1. This utility model, through the arrangement of a servo motor, reducer, and turntable, and by setting up multiple clamping mechanisms, facilitates the simultaneous clamping of other pressure sensors while testing one pressure sensor. This overlaps the clamping time with the testing time, reducing the overall testing time consumed by clamping and changing pressure sensors, thereby improving testing efficiency. Furthermore, the servo motor, in conjunction with the reducer, drives the turntable to rotate, removing the tested pressure sensor from the testing mechanism and sending in the untested pressure sensor, facilitating operation. The multiple clamping mechanisms work alternately to perform clamping operations, further improving testing efficiency.

[0028] 2. This utility model uses a lead screw, a slider, a fixed clamp, and a movable clamp. The lead screw drives the slider to move, and the slider's movement causes the movable clamp to move as well. The fixed clamp and the movable clamp work together to hold the pressure sensor, preventing the pressure sensor from moving during the detection process. The structure is simple, the operation is convenient, and the stability is good.

[0029] 3. This utility model, through the arrangement of a bracket, gear shaft, rack, and bevel gear, allows the pressure sensor to be removed from the testing mechanism after the turntable rotates. The gear shaft of the clamping mechanism corresponding to this pressure sensor will then contact the rack. Assuming the screw rotates clockwise to displace the movable clamp and hold the pressure sensor, the turntable drives the gear shaft to rotate horizontally counter-clockwise. The meshing of the gear shaft and rack is similar to the meshing of a gear and a gear ring, causing the gear shaft and one bevel gear to rotate horizontally counter-clockwise. The meshing of one bevel gear with another causes the other bevel gear to rotate vertically counter-clockwise, thereby driving the screw to rotate counter-clockwise and releasing the movable clamp. The pressure sensor can be directly removed without manual release of the clamp, making operation simple, convenient, and efficient; it also facilitates material unloading. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the structure of this utility model;

[0031] Figure 2 This is a schematic diagram of the rear-view structure of this utility model;

[0032] Figure 3 This is a schematic diagram of the exploded structure of this utility model;

[0033] Figure 4 This is a side sectional view of the present invention.

[0034] Figure 5 This is a schematic diagram of the side structure of the lead screw of this utility model.

[0035] In the diagram: 1. Turntable; 2. Servo motor; 3. Reducer; 4. Fixed clamp; 5. Movable clamp; 6. Lead screw; 7. Slider; 8. Bracket; 9. Gear shaft; 10. Rack; 11. Bevel gear; 12. Handwheel. Detailed Implementation

[0036] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0037] The embodiments of this utility model will be described below based on its overall structure.

[0038] Example 1:

[0039] A pressure sensor measurement and testing fixture, such as Figures 1-4 As shown, the device includes a turntable 1, with a servo motor 2 located at the bottom inside the turntable 1. The output end of the servo motor 2 is connected to a reducer 3, and the output end of the reducer 3 is connected to the turntable 1. Multiple sets of fixed clamps 4, movable clamps 5, lead screws 6, sliders 7, supports 8, gear shafts 9, and bevel gears 11 are provided. These multiple sets of fixed clamps 4, movable clamps 5, lead screws 6, sliders 7, supports 8, gear shafts 9, and bevel gears 11 are arranged in a circular array. By setting multiple clamping mechanisms, it is convenient to clamp other pressure sensors while testing one pressure sensor, overlapping the clamping time with the testing time, reducing the overall testing time consumed by clamping and changing pressure sensors, and thus improving testing efficiency. Furthermore, the servo motor 2, in conjunction with the reducer 3, drives the turntable 1 to rotate counterclockwise, causing the pressure sensors that have been tested to be removed from the testing mechanism, while the pressure sensors that have not been tested are sent into the testing mechanism for easy operation.

[0040] See Figures 1-5 In the above embodiment, a fixed clamp 4 is connected to the top of the turntable 1, and a lead screw 6 passes through the outer surface of the turntable 1. A movable clamp 5 is connected to the top of the lead screw 6 via a slider 7. The movable clamp 5 is slidably connected to the turntable 1, and the slider 7 is threadedly connected to the lead screw 6. The slider 7 has a "T" shaped cross section and is slidably connected to the turntable 1. The operator places the pressure sensor to be tested in the gap between the fixed clamp 4 and the movable clamp 5. Then, the operator rotates the lead screw 6 clockwise, causing the lead screw 6 to drive the slider 7 to move. After the slider 7 moves, it drives the movable clamp 5 to move, thereby clamping the pressure sensor through the cooperation of the fixed clamp 4 and the movable clamp 5, preventing the pressure sensor from running away during the testing process. At this time, the gear shaft 9 does not contact the rack 10, so that the gear shaft 9 can rotate freely without being blocked by the rack 10.

[0041] See Figures 2-5In the above embodiment, a bracket 8 extends through one side of the top of the turntable 1. A gear shaft 9 is connected to the lower part of the inside of the bracket 8. Bevel gears 11 are connected to the top of the gear shaft 9 and the outside of the lead screw 6. The two bevel gears 11 mesh with each other. A rack 10 is provided at the lower part of the inside of the turntable 1. The gear shaft 9 meshes with the rack 10. The rack 10 is arc-shaped and does not contact the turntable 1. When the turntable 1 rotates and moves the pressure sensor that has been tested out of the testing mechanism, the gear shaft 9 included in the clamping mechanism corresponding to this pressure sensor will contact the rack 10. The meshing of the gear shaft 9 and the rack 10 is similar to the meshing of a gear and a gear ring, causing the gear shaft 9 and one bevel gear 11 to rotate horizontally counterclockwise. One bevel gear 11 meshes with another bevel gear 11, causing the other bevel gear 11 to rotate vertically counterclockwise, thereby driving the lead screw 6 to rotate counterclockwise and releasing the movable clamp 5. The pressure sensor can be directly removed without the need for the operator to manually release the clamp, which is simple, convenient and improves efficiency.

[0042] Example 2:

[0043] Based on the above embodiment one, the following settings are now adopted to facilitate the replacement of damaged structures.

[0044] See Figures 1-5 In the above embodiment, the output end of the reducer 3 is provided with a thread. The turntable 1 is detachably connected to the output end of the reducer 3 by a nut. The fixed clamp 4 is detachably connected to the turntable 1 by bolts. The movable clamp 5 is detachably connected to the slider 7 by bolts. When there is structural damage that needs to be replaced, the operator can remove the nut on the output end of the reducer 3 to stop the limiting of the turntable 1, thus facilitating the replacement of the turntable 1. After the turntable 1 is disassembled, the rack 10 is exposed. During this period, the operator can remove the bolts to replace the rack 10. The operator first removes the bolts on the fixed clamp 4 and the movable clamp 5 to replace the fixed clamp 4 and the movable clamp 5. The operator removes the bolts on the bracket 8 and pulls out the lead screw 6 and its external bearing laterally to replace the lead screw 6, the slider 7, the bracket 8, the gear shaft 9, and the bevel gear 11.

[0045] Example 3:

[0046] Based on the above embodiment 1, the following settings are made to facilitate the operation of the lead screw 6.

[0047] See Figures 1-5 In the above embodiment, a handwheel 12 and a thread are provided at one end of the lead screw 6. The handwheel 12 is detachably connected to the lead screw 6 through a nut. The handwheel 12 facilitates the rotation of the lead screw 6 by the operator. Since the handwheel 12 is a detachable structure, it avoids interference when the clamping mechanism is replaced after damage.

[0048] The implementation principle of this utility model is as follows: First, both the reducer 3 and the rack 10 are installed in the testing device, and one set of clamping mechanisms corresponds to the area of ​​the testing mechanism. The clamping mechanism consists of a fixed clamp 4, a movable clamp 5, a lead screw 6, a slider 7, a bracket 8, a gear shaft 9, and a bevel gear 11. The clamping mechanism can also be a bidirectional lead screw 6 combined with two sliders 7 and two movable clamps 5. The main difference is that the lead screw 6 is replaced with a bidirectional lead screw 6, and the fixed clamp 4 is replaced with another slider 7 and another movable clamp 5. Whether it is unidirectional clamping or bidirectional clamping, these are common clamping methods in the prior art, so they are not considered as limitations.

[0049] When in use, the operator places the pressure sensor to be tested in the gap between the fixed clamp 4 and the movable clamp 5. Then, the operator rotates the lead screw 6 clockwise, causing the lead screw 6 to drive the slider 7 to move. After the slider 7 moves, it drives the movable clamp 5 to move, thereby clamping the pressure sensor through the cooperation of the fixed clamp 4 and the movable clamp 5, preventing the pressure sensor from moving during the test. At this time, the gear shaft 9 does not contact the rack 10, so that the gear shaft 9 can rotate freely without being blocked by the rack 10.

[0050] By setting up multiple clamping mechanisms, it is convenient to clamp other pressure sensors while testing one pressure sensor, overlapping the clamping time with the testing time, reducing the overall testing time consumed by clamping and changing pressure sensors, and thus improving testing efficiency. Furthermore, the servo motor 2, in conjunction with the reducer 3, drives the turntable 1 to rotate counterclockwise, so that the pressure sensor that has been tested is removed from the testing mechanism, and the pressure sensor that has not been tested is sent into the testing mechanism for easy operation. When the turntable 1 rotates and moves the pressure sensor that has been tested out of the testing mechanism, the gear shaft 9 of the clamping mechanism corresponding to this pressure sensor will contact the rack 10. The meshing of the gear shaft 9 and the rack 10 is similar to the meshing of a gear and a gear ring, so that the gear shaft 9 and a bevel gear 11 rotate horizontally counterclockwise, and one bevel gear 11 meshes with another bevel gear 11 so that the other bevel gear 11 rotates vertically counterclockwise, thereby driving the lead screw 6 to rotate counterclockwise and releasing the movable clamp 5. The pressure sensor can be directly removed without the need for the operator to manually release the clamp, making the operation simple, convenient and efficient.

[0051] When structural damage requires replacement, the operator can remove the nut on the output end of the reducer 3 to stop the limiting of the turntable 1, thus facilitating the replacement of the turntable 1. After the turntable 1 is disassembled, the rack 10 is exposed, and the operator can remove the bolts to replace the rack 10. The operator can then remove the bolts on the fixed clamp 4 and the movable clamp 5 to replace the fixed clamp 4 and the movable clamp 5. The operator can then remove the bolts on the bracket 8 and pull out the lead screw 6 and its external bearing laterally to replace the lead screw 6, the slider 7, the bracket 8, the gear shaft 9, and the bevel gear 11.

[0052] The length of rack 10 shown in the figure is for reference only. The length of rack 10 can be longer or replaced. A longer rack 10 can completely increase the gap between the fixed clamp 4 and the movable clamp 5 and the pressure sensor, thus making it easier to remove the pressure sensor. A shorter rack 10 can prevent the movable clamp 5 from reaching the end of its stroke after a small displacement, while the turntable 1 continues to rotate, which could cause the gear shaft 9 and rack 10 to jam or break.

[0053] Although embodiments of the present invention have been shown and described, these specific embodiments are merely explanations of the present invention and are not intended to limit the invention. The specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions, and variations to the embodiments as needed without departing from the principles and spirit of the present invention, provided that such modifications, substitutions, and variations are within the scope of the claims of the present invention and are protected by patent law.

Claims

1. A pressure sensor metrology test fixture comprising a turntable (1) characterised in that: A servo motor (2) is installed inside the turntable (1) at the bottom, and a reducer (3) is connected to the output end of the servo motor (2). The output end of the reducer (3) is connected to the turntable (1). A fixed clamp (4) is connected to the top of the turntable (1). A lead screw (6) passes through the outer surface of the turntable (1), and a movable clamp (5) is connected to the top of the lead screw (6) through a slider (7). A bracket (8) passes through one side of the top of the turntable (1), and a gear shaft (9) is connected inside the bottom of the bracket (8). A bevel gear (11) is connected to the top of the gear shaft (9) and the outside of the lead screw (6). A rack (10) is installed inside the bottom of the turntable (1).

2. The pressure sensor metrology test fixture of claim 1, wherein: The movable clamp (5) is slidably connected to the turntable (1), and the slider (7) is threadedly connected to the lead screw (6).

3. The pressure sensor metrology test fixture of claim 2, wherein: The slider (7) has a "T" shaped cross section and is slidably connected to the turntable (1).

4. The pressure sensor metrology test fixture of claim 1, wherein: The gear shaft (9) meshes with the rack (10), and the two bevel gears (11) mesh with each other.

5. The pressure sensor metrology test fixture of claim 4, wherein: The rack (10) is arc-shaped and does not contact the turntable (1).

6. The pressure sensor metrology test fixture of claim 1, wherein: The fixed clamp (4), movable clamp (5), lead screw (6), slider (7), bracket (8), gear shaft (9) and bevel gear (11) are all provided in multiple sets, and the multiple sets of fixed clamp (4), movable clamp (5), lead screw (6), slider (7), bracket (8), gear shaft (9) and bevel gear (11) are all distributed in a ring array.

7. The pressure sensor metrology test fixture of claim 1, wherein: The output end of the reducer (3) is provided with a thread, and the turntable (1) is detachably connected to the output end of the reducer (3) by a nut.

8. The pressure sensor metrology test fixture of claim 7, wherein: The fixed clamp (4) is detachably connected to the turntable (1) by bolts, and the movable clamp (5) is detachably connected to the slider (7) by bolts.

9. The pressure sensor metrology test fixture of claim 8, wherein: The bracket (8) is detachably connected to the turntable (1) by bolts.

10. The pressure sensor metrology test fixture of claim 1, wherein: One end of the lead screw (6) is provided with a handwheel (12) and a thread, and the handwheel (12) is detachably connected to the lead screw (6) through a nut.

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