Universal air tightness detection tool for servo motor

Abstract

The utility model discloses a universal air tightness detection tool for a servo motor, and relates to the technical field of servo motor sealing test. Comprising a holder and a linear driver, the holder comprises a holder, and the periphery of the holder is connected with claw clamps used for clamping the four corners of a square flange of the servo motor; the center position of the holder is connected with a sliding sleeve which penetrates through the holder and is coaxially arranged with the servo motor during air tightness detection, a sealing sleeve with two ends extending out of the sliding sleeve is arranged in the sliding sleeve in a sliding manner, one end of the sealing sleeve is of a closed structure, the other end of the sealing sleeve is open, and the sealing sleeve is connected with an air source connector used for being connected with an air source; the linear driver is used for driving the opening end of the sealing sleeve to be attached to the end face of the output end of the servo motor in a sealed mode. According to the utility model, the adjustable tool is adopted and can be suitable for motors of different models, so that multiple purposes are realized.

Description

Technical Field

[0001] This utility model relates to the field of servo motor sealing test technology, specifically a general-purpose airtightness testing fixture for servo motors. Background Technology

[0002] Because different models of motors have different sizes and end face structures, general air tightness testing fixtures can only meet the needs of a specific model of motor. Different motors cannot be used interchangeably, which cannot meet the requirements of universality. Different models of motors require different air tightness testing fixtures, which increases the testing cost. Utility Model Content

[0003] The purpose of this invention is to provide a universal airtightness testing fixture for servo motors, which can effectively solve the problems in the background art.

[0004] The technical solution to achieve the above objective is: a general-purpose airtightness testing fixture for servo motors, used for airtightness testing of servo motors with square flanges at the output end, characterized in that: the testing fixture includes a clamp and a linear driver, the clamp includes a retainer, and the retainer is connected around its perimeter with jaws for clamping at the four corners of the square flange of the servo motor, the position of the jaws is adjustable along the radial direction of the output shaft of the servo motor.

[0005] A sliding sleeve is connected to the center of the cage and is coaxially set with the servo motor during air tightness testing. A sealing sleeve with both ends extending out of the sliding sleeve is slidably set in the sliding sleeve. The sealing sleeve has a closed structure at one end and an open structure at the other end. An air source connector for connecting an air source is connected to the sealing sleeve.

[0006] The linear actuator is mounted on the clamp via a bracket and is used to drive the open end of the sealing sleeve to seal against the end face of the servo motor output.

[0007] Furthermore, the grippers are connected to the retainer via movable frames. One end of the movable frame is fixed to the grippers, and the other end is provided with a waist-shaped groove arranged in the radial direction along the output shaft of the servo motor. The waist-shaped groove of the movable frame is connected to the retainer in an adjustable position via bolts.

[0008] Furthermore, a clamping groove with a 90° angle is provided at the bottom inner side of the claw.

[0009] Furthermore, the open end of the sealing sleeve is provided with a sealing ring for sealing with the end face of the servo motor. The beneficial effects of this utility model are:

[0010] 1) This utility model adopts an adjustable tooling, which can be applied to different models of motors, realizing multiple uses of one tool.

[0011] 2) The components of this utility model have simple structures, low precision requirements, high reliability, and low maintenance costs.

[0012] 3) The clamping process of this utility model is simple, requires no precision operation, and saves labor time and costs. Attached Figure Description

[0013] Figure 1 This is a cross-sectional view of the present invention;

[0014] Figure 2 This is a partial schematic diagram of the present invention. Detailed Implementation

[0015] like Figure 1 , 2 As shown, this utility model discloses a universal airtightness testing fixture for servo motors, used for airtightness testing of servo motor 1 with a square flange at the output end. The testing fixture includes a clamp 2 and a linear driver 3. The clamp 2 includes a retainer 2.1, which is a square structure with a length and width smaller than the size of the output end face of the servo motor 1. Four jaw clamps 2.2 are connected around the retainer 2.1 for clamping at the four corners of the square flange of the servo motor 1. The bottom inner side of the jaw clamp 2.2 is provided with a clamping groove with a 90° included angle.

[0016] The gripper 2.2 is connected to the retainer 2.1 via the movable frame 2.3. One end of the movable frame 2.3 is fixed to the gripper 2.2, and the other end is provided with a waist-shaped groove 2.4 arranged in the radial direction along the output shaft of the servo motor 1. The waist-shaped groove 2.4 of the movable frame 2.3 is connected to the retainer 2.1 in an adjustable position by bolts.

[0017] A sliding sleeve 2.5 is connected to the center of the retainer 2.1 and is coaxially arranged with the servo motor 1 during air tightness testing. A sealing sleeve 4 with both ends extending out of the sliding sleeve is slidably arranged in the sliding sleeve 2.5. The sealing sleeve 4 has a closed structure at one end and an open structure at the other end. An air source connector 5 for connecting an air source is connected to the sealing sleeve 4.

[0018] The linear actuator 3 is mounted on the retainer 2.1 of the clamp 2 via a bracket 6. A connecting shaft 7 is connected to the center of the closed end of the sealing sleeve 4. The linear actuator 3 is connected to the connecting shaft 7 via a coupling 8. The linear actuator 3 may be, but is not limited to, an electric cylinder.

[0019] The linear driver 3 is used to drive the sealing sleeve 4 to seal against the end face of the output end of the servo motor 1. The opening end of the sealing sleeve 4 is provided with a sealing ring 9 for sealing with the end face of the servo motor.

[0020] The following uses the flange servo motor shown in the figure as an example to explain the operation steps of this utility model. The servo motor to be tested needs to be tested before the oil seal between the motor output shaft and the motor housing is installed.

[0021] 1) First, loosen the connecting bolts between the movable frame 2.3 and the retainer 2.1, put the clamp 2.2 on the flange end of the servo motor 1 and make the clamp 2.2 fit tightly against the included angle position of the flange end, and then tighten the bolts between the clamp 2.2 and the retainer 2.1 to complete the clamping.

[0022] 2) The linear actuator 3 drives the opening end of the sealing sleeve 4 to be fitted downwards onto the output end of the servo motor 1, and the sealing ring 9 is tightly fitted with the end face of the servo motor 1. The diameter of the opening end of the sealing sleeve 4 should be such that the oil seal hole 10 between the output shaft of the servo motor 1 and the servo motor housing is completely sealed inside. The sealing sleeve 4 and the inner cavity of the servo motor 1 are connected to form a closed cavity through the oil seal hole 10.

[0023] 3) Connect the compressed air source through connector 5 and install the pressure regulating valve, then connect the digital differential pressure gauge to conduct the first airtightness test. The test standard is: inflation pressure 1000 mbar, test time 15s, and pressure drop ≤ 15 mbar.

[0024] 4) Disassemble the airtightness testing fixture.

[0025] 5) Apply Great Wall 7016 lubricating grease to the oil seal hole 10 and the inner and outer rings of the oil seal, and install the oil seal into the oil seal hole 10, making sure that the oil seal lip faces inward.

[0026] 6) Use a non-woven cloth to clean up any spilled grease.

[0027] 7) Reinstall the airtightness testing fixture and repeat the airtightness test. The test standard is: inflation pressure 1000 mbar, test time 15s, and pressure drop ≤15 mbar.

[0028] Test conclusion: If both tests meet the requirements, it indicates that the airtightness of the motor cavity and oil seal is good.

Claims

1. A universal airtightness testing fixture for servo motors, used for airtightness testing of servo motors with square flanges at the output end, characterized in that: The inspection fixture includes a gripper and a linear driver. The gripper includes a cage, and the cage is connected around its perimeter with jaws for clamping at the four corners of the square flange of the servo motor. The position of the jaws is adjustable along the radial direction of the servo motor's output shaft. A sliding sleeve is connected to the center of the cage and is coaxially set with the servo motor during air tightness testing. A sealing sleeve with both ends extending out of the sliding sleeve is slidably set in the sliding sleeve. The sealing sleeve has a closed structure at one end and an open structure at the other end. An air source connector for connecting an air source is connected to the sealing sleeve. The linear actuator is mounted on the clamp via a bracket and is used to drive the open end of the sealing sleeve to seal against the end face of the servo motor output.

2. The general-purpose air tightness detection tool for a servo motor according to claim 1, characterized in that: The grippers are connected to the retainer via a movable frame. One end of the movable frame is fixed to the gripper, and the other end is provided with a waist-shaped groove arranged in the radial direction along the output shaft of the servo motor. The waist-shaped groove of the movable frame is connected to the retainer in an adjustable position by bolts.

3. The general-purpose air tightness detection tool for a servo motor according to claim 1, characterized in that: The bottom inner side of the claw is provided with a clamping groove at a 90° angle.

4. The general-purpose air tightness detection tool for a servo motor according to claim 1, characterized in that: The opening end of the sealing sleeve is provided with a sealing ring for sealing with the end face of the servo motor.

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