Motor wave pad number detection device

Abstract

The utility model provides a motor wave pad number detection device, and belongs to the technical field of motor detection equipment. The motor wave pad detection device solves the technical problem that an existing motor wave pad detection device is difficult to improve the applicability under the condition that the detection precision is guaranteed. The motor wave pad number detection device comprises a rack, a pull shaft seat is connected to the rack, a disc-shaped pressure sensor is connected to the top of the pull shaft seat, a clamping jaw capable of clamping the periphery of a motor shaft is connected to the top of the pressure sensor, and a moving seat capable of ascending and descending vertically is further connected to the rack. The movable seat is connected with an ejector rod which is vertically arranged and can ascend and descend vertically relative to the movable seat, the upper end of the ejector rod can penetrate through the pressure sensor and move to the clamping position of the clamping jaw, and the periphery of the ejector rod is sleeved with a compression spring with the upper end and the lower end acting on the ejector rod and the movable seat respectively. And the movable seat is also connected with a displacement sensor capable of detecting the displacement size of the ejector rod. According to the utility model, the applicability of the motor wave pad number detection device can be effectively improved under the condition that the detection precision is guaranteed.

Description

Technical Field

[0001] The utility model belongs to the technical field of motor detection equipment, and relates to a device for detecting the number of wave washers in a motor. Background Technique

[0002] Due to the radial clearance of the bearing in the motor, axial vibration and noise will be generated during the operation of the motor. To solve the axial vibration and noise of the motor, a certain axial preload needs to be applied to the motor bearing to suppress the vibration and generate noise of the motor. The wave washer is also known as a corrugated gasket or a wave washer. As one of the components of the motor, the wave washer is mainly used to pre-apply an axial load to the bearing to prevent the bearing from slipping. During the motor assembly process, the quality of the wave washer directly affects the quality of the assembled motor. Therefore, special wave washer detection equipment is provided during the assembly process to detect whether the wave washer in the motor is missing or over-installed.

[0003] The patent with the application publication number CN112082748A discloses a device for detecting the deformation of the wave washer in a motor, including a downward pulling mechanism. The downward pulling mechanism includes a tension sensor, a pull rod and a pull block. The pull block applies a pulling force to the pulley of the motor to compress the wave washer, and the pulling force is transmitted to the tension sensor through the pull rod, and the state of the wave washer in the motor can be detected.

[0004] The above device can effectively detect whether there are too many or too few wave washers in the motor, but there are still some deficiencies: it can only detect the motor equipped with a pulley, and if the optical axis of the motor is directly clamped for detection, relative displacement is likely to occur between the pull block and the optical axis during the downward pulling process, making it difficult to ensure the detection accuracy. Therefore, the above device cannot be applied to the detection of ordinary motors, resulting in insufficient applicability. Summary of the Invention

[0005] Aiming at the above problems existing in the prior art, the utility model provides a device for detecting the number of wave washers in a motor. The technical problem to be solved by the utility model is that it is difficult for the existing motor wave washer detection device to improve the applicability while ensuring the detection accuracy.

[0006] The purpose of the utility model can be realized by the following technical solutions:

[0007] A device for detecting the number of motor wave washers, comprising a frame, a draw shaft seat connected to the frame and capable of moving up and down, and a disc-shaped pressure sensor connected to the top of the draw shaft seat. It is characterized in that a clamping jaw capable of clamping the outer periphery of the motor shaft is connected to the top of the pressure sensor, a movable seat capable of moving up and down is further connected to the frame, a vertical ejector rod capable of moving up and down relative to the movable seat is connected to the movable seat, the upper end of the ejector rod can penetrate through the pressure sensor and move to the clamping position of the clamping jaw, a compression spring with its upper and lower ends respectively acting on the ejector rod and the movable seat is sleeved outside the ejector rod, and a displacement sensor capable of detecting the displacement size of the ejector rod is further connected to the movable seat.

[0008] When the draw shaft seat moves downward, it can drive the motor shaft positioned in the fixture to move downward and compress the wave washer. The pressure sensor can detect the change data of the pulling force received by the draw shaft seat. A clamping jaw is connected to the top of the pressure sensor, and the clamping jaw can form a clamp on the outer periphery of the motor shaft. Then, through the static friction effect, the motor shaft is driven to move downward. By arranging a movable seat on the frame, a displacement sensor and a vertically arranged ejector rod that can move up and down relative to the movable seat are arranged on the movable seat, and the upper end of the ejector rod can penetrate upward through the pressure sensor and move to the clamping position of the clamping jaw. At the same time, a compression spring is arranged between the outer periphery of the ejector rod and the movable seat to provide an upward acting force for the ejector rod when it is pressed. In this way, during the detection, the clamping jaw can directly clamp the motor shaft for downward pull detection without the need to additionally clamp components such as a pulley, with stronger applicability. After the clamping jaw and the motor shaft are clamped and cooperated, the ejector rod can move upward with the movable seat and abut against the end face of the motor shaft. Then, the draw shaft seat drives the motor shaft to move downward, causing the ejector rod to also compress the compression spring and move downward synchronously. At this time, the displacement sensor detecting the displacement change data of the ejector rod can accurately reflect the actual displacement data of the downward pull of the motor shaft, avoiding the detection result from being inaccurate due to the slippage between the clamping jaw and the motor shaft during the downward pull process and using the displacement data of the draw shaft seat to represent the displacement data of the motor shaft. The entire detection device can accurately detect the number of wave washers in the motor by directly clamping and pulling down the optical axis of a common motor, not limited to detecting motors equipped with pulleys, with a wider scope of application. Furthermore, under the condition of ensuring the detection accuracy, the applicability of the device for detecting the number of motor wave washers is effectively improved.

[0009] In the above device for detecting the number of motor wave washers, the clamping jaw is a three-jaw chuck, and the ejector rod is arranged coaxially with the clamping jaw. The three-jaw chuck realizes stable clamping through the synchronous movement of three circumferentially evenly spaced jaws, which is beneficial to ensuring the stability of the clamping of the clamping jaw. At the same time, the radial limit of the three jaws helps to prevent the motor shaft from shifting during the downward pull, so that the ejector rod can stably move downward synchronously with the motor shaft, ensuring the detection accuracy.

[0010] In the above-mentioned motor wave pad quantity detection device, the top of the moving seat has a vertically arranged guide cylinder, and the guide cylinder is sleeved on the outer circumference of the top rod. In this way, the guide cylinder can provide constraints and guidance for the top rod, thereby making the vertical direction more accurate during its movement, avoiding deviation, and ensuring that the motor shaft displacement data it reflects is more accurate.

[0011] In the above-mentioned motor wave pad quantity detection device, linear bearings are provided between the inner edges of the upper and lower ends of the guide cylinder and the outer periphery of the push rod. In this way, while ensuring the vertical movement direction of the push rod is accurate and stable, the friction resistance generated between the push rod and the guide cylinder is reduced, and the push rod is prevented from generating resistance to the downward movement of the motor shaft and affecting the detection result of the pressure sensor, thereby ensuring the accuracy of the result.

[0012] In the above-mentioned motor wave pad quantity detection device, the frame is connected to a vertically arranged guide rail, and the frame is also rotatably connected to two vertically arranged screw rods. The shaft pulling seat and the moving seat are respectively screwed with different screw rods, and the moving seat is located directly below the shaft pulling seat. The shaft pulling seat and the moving seat are connected to the guide rail at the same time. In this way, the shaft pulling seat and the moving seat are both lifted and lowered by the screw rod to ensure their respective movement accuracy and stability. At the same time, the shaft pulling seat and the moving seat cooperate with the guide rail together to make full use of the frame space, and further ensure that the movement direction of the shaft pulling seat and the moving seat is accurate and stable, thereby ensuring the detection accuracy.

[0013] In the above-mentioned motor wave pad quantity detection device, two servo motors are fixedly arranged on the frame, and the two servo motors are respectively arranged on both sides of the moving seat in the horizontal direction, and the output ends of the two servo motors are arranged downward and are respectively connected to the two screw rods through synchronous belts. In this way, the pull shaft seat and the moving seat are lifted up and down by the servo motors through the screw rods, which is conducive to ensuring the moving accuracy. At the same time, the servo motor output end is arranged downward to make full use of the vertical space of the frame, which is conducive to the compactness of the lifting device.

[0014] Compared with the prior art, the advantages of the utility model are as follows:

[0015] When the motor wave pad quantity detection device is working, there is no need to install a pulley on the motor shaft, and the movement distance of the set push rod can truly reflect the pull-down position of the motor shaft, avoiding the error influence when the clamped motor shaft slips, thereby effectively improving the applicability while ensuring the detection accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 2 is a front view of the structure of the present embodiment.

[0017] Figure 2 yes Figure 1 Schematic diagram of the AA section structure.

[0018] Figure 3 Yes Figure 2 It is an enlarged view of part B in

[0019] Figure 4 It is a schematic top view structure diagram of this embodiment.

[0020] In the figure, 1 is the frame; 11 is the guiding slide rail; 12 is the lead screw; 13 is the servo motor; 14 is the synchronous belt;

[0021] 2 is the drawbar seat; 21 is the pressure sensor; 22 is the jaw;

[0022] 3 is the moving seat; 31 is the ejector rod; 32 is the compression spring; 33 is the displacement sensor; 34 is the guiding cylinder; 35 is the linear bearing. Specific embodiments

[0023] The following are specific embodiments of the present utility model and in combination with the accompanying drawings, the technical solutions of the present utility model are further described, but the present utility model is not limited to these embodiments.

[0024] As Figures 1-4 shown, this motor wave washer quantity detection device includes a frame 1, on which a drawbar seat 2 that can move up and down is connected. At the top of the drawbar seat 2, a disc-shaped pressure sensor 21 is connected. At the top of the pressure sensor 21, a jaw 22 that can clamp the outer periphery of the motor shaft is connected. The jaw 22 is an existing three-jaw chuck. On the frame 1, a moving seat 3 that can move up and down is also connected. On the moving seat 3, a vertically arranged ejector rod 31 that can move up and down relative to the moving seat 3 is connected. The ejector rod 31 is coaxially arranged with the jaw 22. The upper end of the ejector rod 31 can penetrate the pressure sensor 21 and move to the clamping position of the jaw 22. A compression spring 32 whose upper and lower ends respectively act on the ejector rod 31 and the moving seat 3 is sleeved outside the ejector rod 31. The compression spring 32 only bears the ejector rod 31 and has a small spring constant. On the moving seat 3, a displacement sensor 33 that can detect the displacement change data of the ejector rod 31 is also connected. Specifically, the detection position setting and circuit connection of the pressure sensor 21 and the displacement sensor 33 belong to the prior art. When the drawbar seat 2 moves downward, it can drive the motor shaft of the motor positioned in the fixture to move downward and compress the wave washer. The pressure sensor 21 can detect the change data of the pulling force received by the drawbar seat 2. Further, at the top of the moving seat 3, there is a vertically arranged guiding cylinder 34, and the guiding cylinder 34 is sleeved outside the ejector rod 31. As a preference, linear bearings 35, which are existing components, are respectively arranged between the inner edges at the upper and lower ends of the guiding cylinder 34 and the outer periphery of the ejector rod 31. Specifically, the outer periphery of the ejector rod 31 has a shoulder, and the upper and lower ends of the compression spring 32 respectively act on the shoulder and the lower linear bearing 35.

[0025] As Figure 1 、 Figure 4As shown, the frame 1 is connected to two vertically arranged and horizontally spaced guide rails 11, and the frame 1 is also rotatably connected to two vertically arranged screw rods 12, which are located between the two guide rails 11. The shaft pulling seat 2 and the moving seat 3 are respectively screwed with different screw rods 12, and the moving seat 3 is located directly below the shaft pulling seat 2. The shaft pulling seat 2 and the moving seat 3 are simultaneously connected to the guide rails 11. Two servo motors 13 are fixedly arranged on the frame 1, and the two servo motors 13 are respectively arranged on both sides of the moving seat 3 in the horizontal direction. The output ends of the two servo motors 13 are arranged downward and are respectively connected to the two screw rods 12 through synchronous belts 14.

[0026] During operation, the motor is first placed downward into the existing fixture located directly above the detection device, with the motor shaft exposed downward. Then the shaft seat 2 is moved upward to allow the clamping claws 22 to clamp the motor shaft. The moving seat 3 is then moved upward to drive the upper end of the push rod 31 to form abutment with the lower end surface of the motor shaft. Finally, the shaft seat 2 is moved downward to clamp the motor shaft. The pressure sensor 21 will have a force feedback output, and the displacement sensor 33 will also have a displacement output. The number of wave pads inside the motor can be determined based on the corresponding relationship between the force value and the displacement value.

[0027] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A motor wave pad quantity detection device, comprising a frame (1), the frame (1) is connected to a shaft pulling seat (2) that can be raised and lowered, the top of the shaft pulling seat (2) is connected to a disk-shaped pressure sensor (21), characterized in that: The top of the pressure sensor (21) is connected to a clamping claw (22) capable of clamping the outer periphery of the motor shaft. The frame (1) is also connected to a movable seat (3) capable of being lifted up and down. The movable seat (3) is connected to a vertically arranged push rod (31) capable of being lifted up and down relative to the movable seat (3). The upper end of the push rod (31) can penetrate the pressure sensor (21) and move to the clamping position of the clamping claw (22). The outer periphery of the push rod (31) is sleeved with a compression spring (32) having upper and lower ends respectively acting on the push rod (31) and the movable seat (3). The movable seat (3) is also connected to a displacement sensor (33) capable of detecting the displacement size of the push rod (31).

2. The motor wave pad quantity detection device according to claim 1, characterized in that: The clamping jaw (22) is a three-jaw chuck, and the push rod (31) is coaxially arranged with the clamping jaw (22).

3. The motor wave pad quantity detection device according to claim 1 or 2, characterized in that: The top of the movable seat (3) is provided with a vertically arranged guide cylinder (34), and the guide cylinder (34) is sleeved on the outer periphery of the push rod (31).

4. The motor wave pad quantity detection device according to claim 3 is characterized in that: Linear bearings (35) are provided between the inner edges of the upper and lower ends of the guide cylinder (34) and the outer periphery of the push rod (31).

5. The motor wave pad quantity detection device according to claim 1 or 2, characterized in that: The frame (1) is connected to a vertically arranged guide rail (11), and the frame (1) is also rotatably connected to two vertically arranged screw rods (12). The shaft pulling seat (2) and the movable seat (3) are respectively threadedly engaged with different screw rods (12), and the movable seat (3) is located directly below the shaft pulling seat (2). The shaft pulling seat (2) and the movable seat (3) are simultaneously connected to the guide rail (11).

6. The motor wave pad quantity detection device according to claim 5, characterized in that: Two servo motors (13) are fixedly mounted on the frame (1). The two servo motors (13) are respectively arranged on both sides of the movable seat (3) in a horizontal direction. The output ends of the two servo motors (13) are arranged downward and are respectively connected to the two screw rods (12) through synchronous belts (14).

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