Screw jumping detection device of stepping motor

Abstract

The utility model discloses a screw run-out detection device of a stepping motor, which comprises a dial indicator which is a digital display dial indicator with a locking maximum reading, and further comprises a base, a dial indicator, a detection device and a control device, wherein the dial indicator is a digital display dial indicator with a locking maximum reading; after the mounting plate is fixed with one end of the base, one part of the mounting plate is positioned above the base; the first driver is located on one side of the mounting plate and fixed to the mounting plate; the ejector rod is positioned on the other side of the mounting plate and is fixed with the mounting plate; after the baffle is fixed to the other end of the base, one part of the baffle is located above the base, a containing space is formed between the ejector rod and the baffle, a notch matched with a screw of the stepping motor is formed in the baffle, and the dial indicator is located on one side of the baffle. According to the utility model, the maximum run-out value of the screw rod can be directly displayed when the screw rod rotates for a circle.

Description

Technical Field

[0001] The utility model relates to the technical field of stepping motors, and particularly relates to a screw jump detection device for a stepping motor. Background Art

[0002] In today's automation field, the external drive stepping motor uses a screw-nut drive to convert electrical pulses into an actuator for angular displacement and position displacement, which has been widely used in industrial equipment and occupies an important position.

[0003] Due to process defects, the roundness of the cross-sectional circle of the screw is not 100%, that is, the cross-section of the screw can only be approximately circular, resulting in the screw jumping during rotation. Therefore, the jump detection of the screw is one of the essential detection steps after the screw is produced.

[0004] The commonly used method for jump detection is to clamp the screw with a fixture and drive it to rotate by the fixture. The operator uses an ordinary micrometer to detect the rotating screw. During the rotation of the screw, the operator needs to collect and record multiple jump values generated during one rotation of the screw, and finally select the maximum value from these jump values. This method requires the operator to keep an eye on the micrometer all the time, which not only increases the labor intensity of the operator, but also easily causes the jump values to be missed if the rotation speed of the screw is relatively fast. Therefore, the screw can only be rotated at a very slow speed, but this method will also result in a slow detection speed and low detection efficiency. Summary of the Utility Model

[0005] The utility model provides a screw jump detection device for a stepping motor, which can directly display the maximum jump value of the screw when the screw rotates one week.

[0006] The technical solution for solving the above technical problems is as follows:

[0007] A screw jump detection device for a stepping motor, including a micrometer. The micrometer is a digital display micrometer with a locked maximum reading, and further includes:

[0008] A base;

[0009] A mounting plate. After the mounting plate is fixed to one end of the base, a part of the mounting plate is located above the base;

[0010] A first driver, which is located on one side of the mounting plate and fixed to the mounting plate;

[0011] A ejector rod, which is located on the other side of the mounting plate and fixed to the mounting plate;

[0012] The baffle, after being fixed to the other end of the base, a part of the baffle is located above the base. There is an accommodation space between the ejector rod and the baffle. The baffle is provided with a notch that mates with the screw of the stepper motor. The dial indicator is located on one side of the baffle.

[0013] Further, the ejector rod is provided with a relief groove on the upper part for mating with the stepper motor.

[0014] Further, it further includes a manual valve. The first driver is a cylinder or a hydraulic cylinder, and the manual valve is connected to the first driver.

[0015] Further, it further includes a guide rail and a slide seat. The extending directions at both ends of the guide rail are parallel to the axial direction of the screw. The slide seat is slidably mated with the guide rail. The dial indicator is fixed to the slide seat.

[0016] Further, it further includes a linear driver for driving the slide seat to move along the guide rail. The linear driver is connected to the slide seat.

[0017] When using the utility model to detect the screw of the stepper motor, the screw of the stepper motor is mated with the notch, so that the main body part of the stepper motor enters the accommodation space and is supported by the base. The manual valve is toggled, and the first driver acts. The first driver drives the ejector rod to move. The ejector rod abuts against the rear end cover of the stepper motor to be measured, so that the stepper motor is clamped by the ejector rod and the baffle, thereby automatically fixing the stepper motor. The probe of the dial indicator contacts the screw, and the dial indicator is zeroed. The dial indicator is set to automatically lock the maximum value. After the stepper motor is powered on, the screw rotates. If the screw has a jump during operation, the probe of the dial indicator will be squeezed, thereby displaying the jump value. Since the dial indicator is set to automatically lock the maximum value, after the screw rotates one week, the reading on the dial indicator is the maximum jump value of this part of the screw. If other parts of the screw need to be detected, move the dial indicator and operate according to the above process. Description of the Drawings

[0018] Figure 1 It is an exploded view of the screw jump detection device for the first type of stepper motor.

[0019] Figure 2 is Figure 1 the assembly drawing of the detection device shown.

[0020] Figure 3 is the assembly drawing of the screw jump detection device for the first type of stepper motor.

[0021] Marks in the drawings:

[0022] Dial indicator 1, base 2, mounting plate 3, first driver 4, ejector rod 5, relief groove 5a, baffle 6, notch 6a, accommodation space 7, manual valve 8, guide rail 9, slide seat 10, linear driver 11, stepper motor A, screw B. Detailed implementation manners

[0023] The present utility model will be further described in detail below with reference to the accompanying drawings and specific implementation manners.

[0024] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. 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 should not be construed as a limitation to the present utility model.

[0025] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present utility model, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0026] In the present utility model, unless otherwise clearly specified and limited, the terms such as "installation", "connection", "connection", "fixation", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0027] In the present utility model, unless otherwise clearly specified and limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "below" and "beneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0028] Such as Figures 1 to 2As shown in the figure, a screw jump detection device for a stepping motor includes a dial indicator 1, a base 2, a mounting plate 3, a first driver 4, a push rod 5, and a baffle 6. The following will explain each part and the relationship between them in detail.

[0029] In the present utility model, the dial indicator 1 is a digital dial indicator of model 543-551DC produced by Mitutoyo of Japan. This dial indicator 1 has the function of locking the maximum reading digit, that is, this digital dial indicator has a locking function for the maximum reading. For example, when the screw B of the stepping motor A rotates one circle, three jump values are detected, and the readings of these three jump values are 0.1 mm, 0.15 mm, and 0.12 mm in sequence. When the first jump value of 0.1 mm is detected, the reading displayed on the dial indicator 1 is 0.1 mm. When the second jump value of 0.15 mm is detected, the reading displayed on the dial indicator 1 is updated to 0.15 mm at this time. When the third jump value of 0.12 mm is detected, the reading displayed on the dial indicator 1 is still 0.15 mm and will not be updated to 0.12 mm.

[0030] In the present utility model, the base 2 is in the shape of a cuboid, and the mounting plate 3 is in the shape of a cuboid. After the mounting plate 3 is fixed to one end of the base 2, a part of the mounting plate 3 is located above the base 2. The height of the mounting plate 3 is greater than the height of the base 2. After the side surface of the mounting plate 3 is attached to one end of the base 2, the mounting plate 3 and the base 2 are locked into one body by screws, so that a part of the mounting plate 3 is located above the base 2.

[0031] The first driver 4 is located on one side of the mounting plate 3 and is fixed to the mounting plate 3. The first driver 4 and the mounting plate 3 are fastened into one body by screws. The first driver 4 can be a cylinder or a hydraulic cylinder. In the present utility model, the first driver 4 preferably adopts a cylinder. The first driver 4 is connected to a manual valve 8, and the manual valve 8 is connected to a gas storage unit (not shown in the figure).

[0032] The push rod 5 is located on the other side of the mounting plate 3 and is fixed to the mounting plate 3. The push rod 5 is provided with a relief groove 5a for cooperating with the stepping motor A. There are two relief grooves 5a. The first relief groove 5a penetrates the circumferential surface of the push rod 5, and the first relief groove 5a communicates with the first relief groove 5a. Since some stepping motors A are equipped with encoders, the encoders will occupy corresponding spaces. To avoid applying clamping forces to the encoders, the encoders are fitted with the relief grooves 5a, which can avoid damaging the encoders.

[0033] After the baffle 6 is fixed to the other end of the base 2, a part of the baffle 6 is located above the base 2. The height of the baffle 6 is greater than that of the base 2. After the side surface of the baffle 6 fits with the other end of the base 2, the baffle 6 and the base 2 are locked together with screws, so that a part of the baffle 6 is located above the base 2. Since both the mounting plate 3 and a part of the baffle 6 are located above the base 2, a receiving space 7 is formed between the ejector rod 5 and the baffle 6. The main body part of the stepping motor A is clamped by the ejector rod 5 and the baffle 6. The baffle 6 is provided with a notch 6a that cooperates with the screw rod of the stepping motor, and the screw rod B cooperates with the notch 6a.

[0034] In the present utility model, the dial indicator 1 is located on one side of the baffle 6. The dial indicator 1 can be stationary at a certain position or can be moved. In the present utility model, preferably, the dial indicator 1 can be moved. Therefore, the present utility model further includes a guide rail 9 and a sliding seat 10. The extending directions of both ends of the guide rail 9 are parallel to the axial direction of the screw rod. The sliding seat 10 is slidably matched with the guide rail 9. The dial indicator 1 is fixed to the sliding seat 10. The sliding seat 10 can be locked with the guide rail 9 by a locking screw. For example, a locking screw passes through the sliding seat 10, and the end of the screw abuts against the guide rail 9, and the locking screw is threadedly connected to the sliding seat 10. When it is necessary to move the sliding seat 10, the locking screw is loosened, and the sliding seat 10 is manually driven to move along the guide rail 9.

[0035] However, a more preferred solution is, as Figure 3 shown, a linear actuator 11 is used to drive the sliding seat 10 to move along the guide 9, and the linear actuator 11 is connected to the sliding seat 10. The linear actuator 11 can be a cylinder, a hydraulic cylinder, a linear motor, etc. In the present utility model, the linear actuator 11 preferably adopts a stepping motor. Since the stepping motor converts an electrical pulse signal into a linear displacement, for each input pulse signal, the rotor rotates an angle or moves forward one step, and the output linear displacement is proportional to the number of input pulse signals. Therefore, when it is necessary to move the dial indicator 1, only the number of pulse signals needs to be input to the linear actuator 11.

Claims

1. A screw jump detection device for a stepper motor, comprising a dial indicator (1), characterized in that, The dial indicator (1) is a digital dial indicator with a locked maximum reading, and further includes: a base (2); a mounting plate (3), after the mounting plate (3) is fixed to one end of the base (2), a part of the mounting plate (3) is located above the base (2); a first driver (4), the first driver (4) is located on one side of the mounting plate (3) and fixed to the mounting plate (3); a push rod (5), the push rod (5) is located on the other side of the mounting plate (3) and fixed to the mounting plate (3); a baffle (6), after the baffle (6) is fixed to the other end of the base (2), a part of the baffle (6) is located above the base (2), there is a receiving space (7) between the push rod (5) and the baffle (6), the baffle (6) is provided with a notch (6a) for cooperating with the screw of the stepping motor, and the dial indicator (1) is located on one side of the baffle (6).

2. The screw jump detection device of a stepping motor according to claim 1, wherein The push rod (5) is provided with a relief groove (5a) for cooperating with the stepping motor.

3. The screw jump detection device for a stepping motor according to claim 1, characterized in that, It further includes a manual valve (8), the first driver (4) is a cylinder or a hydraulic cylinder, and the manual valve (8) is connected to the first driver (4).

4. A screw jump detection device for a stepper motor according to claim 1, characterized in that, It further includes a guide rail (9) and a sliding seat (10), the extending directions at both ends of the guide rail (9) are parallel to the axial direction of the screw, the sliding seat (10) is slidably matched with the guide rail (9), and the dial indicator (1) is fixed to the sliding seat (10).

5. The screw jump detection device of a stepping motor according to claim 4, characterized in that, It further includes a linear driver (11) for driving the sliding seat (10) to move along the guide rail (9), and the linear driver (11) is connected to the sliding seat (10).

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