Lead screw jumping straightening device for lead screw stepping motor

Abstract

The utility model discloses a lead screw runout straightening device for a lead screw stepping motor, which comprises a motor positioning component, a motor positioning component and a motor positioning component, the motor positioning component comprises a positioning plate and a fixing part, the positioning plate is used for being supported from the bottom and is suitable for abutting against one shaft side end of the motor, and the fixing part is suitable for moving close to and away from the positioning plate relatively; the fixing piece is suitable for abutting against the other shaft side end of the motor. The measuring and straightening mechanism comprises a measuring assembly and a straightening assembly which are located on one axial side of the motor and located on the two sides of the lead screw in the radial direction of the lead screw respectively; the measuring assembly at least comprises a measuring device suitable for displaying straightness parameters of the lead screw when the lead screw connected with the motor rotates. The straightening assembly at least comprises a straightening piece suitable for acting on the lead screw and changing the straightness of the lead screw and an acting piece used for driving the straightening piece to move close to and away from the lead screw relatively. According to the utility model, the straightening precision can be improved on the basis of improving the detection and straightening efficiency.

Description

Technical Field

[0001] This utility model relates to the field of motor testing equipment technology, and in particular to a lead screw runout straightening device for lead screw stepper motors. Background Technology

[0002] A lead screw stepper motor, also known as a linear stepper motor, generates rotation through the interaction of a magnetic rotor core and a pulsed electromagnetic field generated by the stator. Internally, the lead screw stepper motor converts rotational motion into linear motion. It is widely used in various industries. However, during lead screw machining and motor assembly, issues related to machining accuracy and lead screw fit can lead to lead screw runout. Lead screw stepper motors have high requirements for lead screw stability; therefore, stability testing is necessary after production.

[0003] In response, CN217541727U discloses a semi-automatic shaft runout straightening device for a lead screw stepper motor. This device measures the runout of the lead screw shaft using a percentage tester. When the runout value exceeds the limit, the power is cut off, a second support supports the end of the lead screw shaft, and then a hand-operated press is used to straighten the lead screw until the runout meets the requirements. While this disclosed technology can simultaneously measure the runout value and straighten the lead screw shaft, it requires a separate press. Furthermore, for lead screws that pass through the motor, when both shaft ends extend outside the motor, the aforementioned technology cannot meet the requirement for simultaneous detection.

[0004] Therefore, in view of the defects of the lead screw runout straightening device used in the lead screw stepper motor in the existing technology, it is necessary to further optimize its overall structure. Utility Model Content

[0005] The purpose of this invention is to provide a lead screw runout straightening device for lead screw stepper motors, so as to solve the technical problem of optimizing its overall structure.

[0006] The lead screw runout straightening device for lead screw stepper motors of this utility model is implemented as follows:

[0007] A lead screw runout straightening device for a lead screw stepper motor, comprising:

[0008] A motor positioning assembly includes a positioning plate for bottom support and adapted to abut against one axial end of a motor, and a fixing member adapted to move relatively closer to and relatively further away from the positioning plate; the fixing member is adapted to abut against the other axial end of the motor.

[0009] At least one pair of measuring and straightening mechanisms, each comprising a measuring component located on one axial side of the motor and on both sides of the lead screw along the radial direction of the lead screw, and a straightening component; the measuring component includes at least a measuring device adapted to display the straightness parameter of the lead screw when the lead screw connected to the motor rotates; the straightening component includes at least a straightening element adapted to act on the lead screw and change the straightness of the lead screw, and an actuating element for driving the straightening element to move relatively closer to and relatively further away from the lead screw.

[0010] In an optional embodiment of this invention, the fixing member is also connected to a driver suitable for linear telescopic motion.

[0011] In an optional embodiment of this invention, the fixing member has an axial space suitable for accommodating a portion of the lead screw.

[0012] In an optional embodiment of this invention, a pair of measuring and straightening mechanisms are further provided on the other axial side of the motor, and the pair of measuring and straightening mechanisms includes a measuring component and a straightening component located on one axial side of the motor and respectively on both sides of the lead screw along the radial direction of the lead screw; and

[0013] The fixing member has a hollowed-out relief opening along the radial direction of the lead screw, which is connected to the axial space and is suitable for the passage of part of the measuring component and part of the straightening component.

[0014] In optional embodiments of this invention, the measuring device is a dial indicator or a micrometer.

[0015] In an optional embodiment of this invention, each pair of measuring and straightening mechanisms further includes a sliding seat for simultaneously driving the measuring component and the straightening component to move;

[0016] The sliding seat is fitted with a slide rail assembly.

[0017] In an optional embodiment of this utility model, the slide rail assembly includes a pair of slide rails extending parallel to the lead screw axis and located on both radial sides of the lead screw, and a pair of sliding blocks adapted to slide in a one-to-one manner with the pair of slide rails.

[0018] The sliding seat is simultaneously fixedly connected to a pair of sliding blocks.

[0019] In an optional embodiment of this utility model, the sliding seat is equipped with at least one fixed knob suitable for loosening and tightening along a direction perpendicular to the slide rail;

[0020] One of the fixed knobs is adapted to abut against a slide rail.

[0021] In an optional embodiment of this utility model, the actuating element is an elbow clamp; the straightening element is a telescopic rod connected to the elbow clamp.

[0022] In an optional embodiment of this invention, the end of the telescopic rod away from the elbow clamp is further provided with a buffer sleeve for abutting against the outer surface of the lead screw.

[0023] By adopting the above technical solution, this utility model has the following beneficial effects: The lead screw runout straightening device for lead screw stepper motor of this utility model detects the bending direction and degree of bending of the lead screw through the measuring component, and then straightens the lead screw according to the detection results. Therefore, the detection and straightening of the lead screw can be completed directly on one device, which improves the efficiency of the lead screw runout straightening device.

[0024] In addition, by setting up a pair of measuring and straightening mechanisms, the parts of the lead screw that extend to both sides of the motor axis can be detected and straightened separately, thereby improving the straightening accuracy while improving the detection and straightening efficiency. Attached Figure Description

[0025] Figure 1 This is a first-view schematic diagram of the lead screw runout straightening device for a lead screw stepper motor according to the present invention.

[0026] Figure 2 This is a second-view schematic diagram of the lead screw runout straightening device for a lead screw stepper motor according to the present invention.

[0027] Figure 3 This is a third-view schematic diagram of the lead screw runout straightening device for a lead screw stepper motor according to the present invention.

[0028] Figure 4 This is a fourth-view schematic diagram of the lead screw runout straightening device for a lead screw stepper motor according to the present invention.

[0029] In the diagram: Motor 1, Lead screw 2, Fixing component 31, Axial space 311, Hollowed-out clearance opening 312, Positioning plate 32, Measuring device 41, Actuating component 42, Straightening component 43, Buffer sleeve 44, Sliding seat 5, Slide rail 61, Sliding block 62, Fixing knob 63, Driver 7. Detailed Implementation

[0030] To make the contents of this utility model easier to understand, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0031] Example 1:

[0032] Please see Figures 1 to 4 As shown, this embodiment provides a lead screw runout straightening device for a lead screw stepper motor, including at least one pair of measuring and straightening mechanisms for use with a motor positioning assembly. The motor positioning assembly is used to fix the motor 1 under test, while the measuring and straightening mechanisms are used to measure and straighten the lead screw 2.

[0033] When the lead screw 2 of the stepper motor 1 extends only from one axial end of the lead screw 2, only one pair of measuring and straightening mechanisms is needed to meet the requirements of this embodiment. However, when the lead screw 2 passes through the axial direction of the motor 1 and extends partially from both axial ends of the motor 1, a pair of measuring and straightening mechanisms can be respectively set on the two axial sides of the motor 1 to measure and straighten the portions of the lead screw 2 extending to the outer sides of the two axial ends of the motor 1. Regardless of whether one or two pairs of measuring and straightening mechanisms are used, the structure of the measuring and straightening mechanisms themselves can be the same. Therefore, the following description of the structure of the measuring and straightening mechanisms can correspond to any pair.

[0034] Next, we will describe in detail the motor positioning assembly, which includes a positioning plate 32 for bottom support and adapted to abut against one axial end of the motor 1, and a fixing member 31 adapted to move relatively closer to and relatively further away from the positioning plate 32; the fixing member 31 is adapted to abut against the other axial end of the motor 1. The fixing member 31 is also connected to a driver 7 adapted to perform linear telescopic movement, which may be, for example, but not limited to, a cylinder, in which case the piston rod of the cylinder is connected to the fixing member 31. The positioning plate 32 is L-shaped to support the two different end faces of the motor 1.

[0035] Based on the above, it should be noted that when the lead screw 2 extends through the axial direction of the motor 1 and protrudes from each of the two shaft ends of the motor 1, the fixing member 31 has an axial space 311 suitable for accommodating part of the lead screw 2. That is to say, when the fixing member 31 moves toward the motor 1 to abut against one shaft end of the motor 1, the lead screw 2 partially enters the axial space 311 of the fixing member 31. This not only facilitates the fixing member 31 to abut against the motor 1, but also prevents interference from the lead screw 2, and prevents the fixing member 31 from colliding with the lead screw 2 when moving toward the motor 1.

[0036] Secondly, each pair of measuring and straightening mechanisms includes a measuring component and a straightening component located on one axial side of the motor 1 and on both sides of the lead screw 2 along the radial direction of the lead screw 2.

[0037] Referring to the accompanying drawings, in one optional embodiment, the measuring component in this embodiment includes at least a measuring device 41 adapted to display the straightness parameter of the lead screw 2 when the lead screw 2 connected to the motor 1 rotates; the measuring device 41 here is a dial indicator or a micrometer.

[0038] The straightening assembly includes at least a straightening member 43 adapted to act on the lead screw 2 and change the straightness of the lead screw 2, and an actuating member 42 for driving the straightening member 43 to move relatively closer to and relatively further away from the lead screw 2. Taking the accompanying drawings as an example, the actuating member 42 is an elbow clamp; the straightening member 43 is a telescopic rod connected to the elbow clamp. The end of the telescopic rod away from the elbow clamp is also provided with a buffer sleeve 44 for abutting against the outer surface of the lead screw 2. The buffer sleeve 44 can be, for example, but not limited to, a copper sleeve. The copper sleeve is relatively soft, and when it contacts the lead screw 2 during straightening, it can effectively prevent the lead screw 2 from being scratched during the straightening process.

[0039] Regarding the cooperation and operating principle of the elbow clamp and the telescopic rod, any mature means in the prior art can be adopted, such as, but not limited to, the cooperation structure of the elbow clamp and the clamping plate in the elbow clamp extension positioning mechanism disclosed in CN211565632U. In this embodiment, the elbow clamp is operated by hand, so that the telescopic rod can move relatively closer and relatively further away from the lead screw 2.

[0040] Based on the case of each pair of measuring and straightening mechanisms in this embodiment, when the lead screw 2 extends through the axial direction of the motor 1 and protrudes partially from each of the two shaft ends of the motor 1, the fixing member 31 has a hollow relief opening 312 along the radial direction of the lead screw 2, which communicates with the axial space 311 and is suitable for the passage of a portion of the measuring component and a portion of the straightening component. In this way, the measuring device 41 and the straightening component 43 can extend into the axial space 311 through the hollow relief opening 312 to detect and straighten the lead screw 2 extending into the axial space 311.

[0041] In summary, for the lead screw runout straightening device for a lead screw stepper motor in this embodiment, when the motor 1 is mounted on the positioning plate 32, the fixing member 31 abuts against one shaft end of the motor 1 under the action of the driver, that is, the motor 1 is fixed by the fixing member 31 and the positioning plate 32. When the motor 1 is powered on, the runout value of the lead screw 2 is observed by the measuring device 41. If the runout value is qualified, the fixing member 31 can be moved away from the motor 1 by the driver, making it convenient to remove the motor 1; if the runout value of the lead screw 2 is not qualified, the runout value is observed, and the motor 1 is stopped when the runout value of the lead screw 2 is at its minimum. Then, the straightening member 43 is brought into contact with the outer surface of the lead screw 2 by pushing the handle of the elbow clamp, and then the straightening of the lead screw 2 is completed. That is to say, this embodiment detects the bending direction and bending degree of the lead screw 2 by the measuring component, and then straightens the lead screw 2 according to the detection results. Therefore, the detection and straightening of the lead screw 2 can be completed directly on one device, which improves the efficiency of the lead screw 2 runout straightening device. Furthermore, by setting up a pair of measuring and straightening mechanisms, the portions of the lead screw 2 extending to both sides of the motor 1 can be detected and straightened separately, thereby improving the straightening accuracy while increasing the efficiency of detection and straightening.

[0042] Example 2:

[0043] Please see Figures 1 to 4 As shown, based on the lead screw runout straightening device for a lead screw stepper motor in Embodiment 1, each pair of measuring and straightening mechanisms in the lead screw runout straightening device for a lead screw stepper motor provided in this embodiment further includes a sliding seat 5 for simultaneously driving the measuring component and the straightening component; the sliding seat 5 is fitted with a slide rail assembly. That is to say, when two pairs of measuring and straightening mechanisms are provided, the sliding seats 5 of the two pairs of measuring and straightening mechanisms can be fitted with the same set of slide rail assemblies.

[0044] In this embodiment, the same sliding seat 5 drives the movement of the measuring component and the straightening component of each pair of measuring and straightening mechanisms, so that the measuring component and the straightening component move synchronously. The higher the synchronization, the better the detection and straightening effect.

[0045] Referring to the accompanying drawings, in one optional embodiment, the slide rail assembly includes a pair of slide rails 61 extending parallel to the axial direction of the lead screw 2 and located on both radial sides of the lead screw 2, and a pair of sliding blocks 62 adapted to slide in a one-to-one manner with the pair of slide rails 61; the sliding seat 5 is simultaneously fixedly connected to the pair of sliding blocks 62. That is to say, in this embodiment, the sliding seat 5 extends radially along the lead screw 2. It should be noted that the portion of the sliding seat 5 located between the pair of slide rails 61 is within the axial extension range of the lead screw 2. To prevent the sliding seat 5, carrying the measuring component and the straightening component, from colliding with the lead screw 2 when moving axially along the lead screw 2, there is a longitudinal height difference between the lead screw 2 and the sliding seat 5. That is, when the sliding seat 5 moves to below the lead screw 2, there is a longitudinal gap between the lead screw 2 and the sliding seat 5.

[0046] Furthermore, it should be noted that when the sliding seat 5, carrying the measuring component and the straightening component, moves along the axial direction of the lead screw 2 to a certain position, the position of the sliding seat 5 relative to the slide rail assembly needs to be locked to prevent unexpected sliding problems of the sliding seat 5. This embodiment also includes the following design:

[0047] The sliding seat 5 is equipped with at least one fixed knob 63, which is suitable for loosening and tightening along the direction perpendicular to the slide rail 61; one fixed knob 63 is suitable for abutting against one slide rail 61. That is to say, when the sliding seat 5 moves into position, tightening the fixed knob 63 can make the fixed knob 63 have a tight fit with the slide rail 61, making it difficult for the sliding seat 5 to move.

[0048] Furthermore, it should be noted that, considering the process of the measuring device 41 moving along the axial direction of the lead screw 2 with the sliding seat 5, in order to prevent friction between the contact of the measuring device 41, such as the dial indicator, and the axial surface of the lead screw 2, in an optional implementation, the dial indicator adopts an elastic contact using any mature means in the prior art. In this way, while moving the sliding seat 5, the elastic contact is pressed by the finger to create a certain gap between it and the axial surface of the lead screw 2. When the sliding seat 5 moves to the position, the elastic contact is released so that the elastic contact contacts the outer surface of the lead screw 2. In another feasible implementation, a small-range floating fit can be formed between the measuring device 41 and the sliding seat 5, with the direction of this floating fit designed along the radial direction of the lead screw 2. This can be achieved by using, for example but not limited to, a spring, between the measuring device 41 and the sliding seat 5. Similarly, when the sliding seat 5 is moved, the measuring device 41 is manually pressed, creating a certain gap between the detection end of the measuring device 41, which contacts the surface of the lead screw 2, and the axial surface of the lead screw 2. Once the sliding seat 5 has moved to its designated position, the measuring device 41 is released, allowing the detection end of the measuring device 41 to contact the outer surface of the lead screw 2. Therefore, this embodiment does not absolutely limit the specific method for preventing direct friction between the detection end of the measuring device 41 and the outer surface of the lead screw 2 during the axial movement of the sliding seat 5 along the lead screw 2.

[0049] In summary, for the lead screw runout straightening device for the lead screw stepper motor in this embodiment, the slide rail assembly allows the measuring and straightening mechanism to move along the axial direction of the lead screw 2, thereby facilitating the measurement and straightening of different axial positions of the lead screw 2 and improving the accuracy of the test results.

[0050] The above specific embodiments further illustrate the purpose, technical solution, and beneficial effects of this utility model. It should be understood that the above are merely specific embodiments of this utility model and are not intended to limit this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

[0051] In the description of this utility model, it should be understood that the terms indicating orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0052] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0053] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0054] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0055] In this invention, unless otherwise expressly specified and limited, "above or below" the first feature may include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on" the first feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the first feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

Claims

1. A lead screw runout straightening device for a lead screw stepper motor, characterized in that, include: A motor positioning assembly includes a positioning plate for bottom support and adapted to abut against one axial end of a motor, and a fixing member adapted to move relatively closer to and relatively further away from the positioning plate; the fixing member is adapted to abut against the other axial end of the motor. At least one pair of measuring and straightening mechanisms, each comprising a measuring component located on one axial side of the motor and on both sides of the lead screw along the radial direction of the lead screw, and a straightening component; the measuring component includes at least a measuring device adapted to display the straightness parameter of the lead screw when the lead screw connected to the motor rotates; the straightening component includes at least a straightening element adapted to act on the lead screw and change the straightness of the lead screw, and an actuating element for driving the straightening element to move relatively closer to and relatively further away from the lead screw.

2. The lead screw jump correction device for a lead screw stepper motor according to claim 1, wherein The fixing element is also connected to a actuator suitable for linear telescopic motion.

3. The lead screw jump correction device for a lead screw stepper motor according to claim 1, wherein The fastener has axial space suitable for accommodating part of the lead screw.

4. The lead screw jump correction device for a lead screw stepper motor according to claim 3, wherein A pair of measuring and straightening mechanisms are also provided on the other axial side of the motor, and the pair of measuring and straightening mechanisms includes a measuring component and a straightening component located on one axial side of the motor and respectively on both sides of the lead screw along the radial direction of the lead screw; and The fixing member has a hollowed-out relief opening along the radial direction of the lead screw, which is connected to the axial space and is suitable for the passage of part of the measuring component and part of the straightening component.

5. The lead screw jump correction device for a lead screw stepping motor according to any one of claims 1 to 4, characterized in that, The measuring device is a dial indicator or a micrometer.

6. The lead screw jump correction device for a lead screw stepper motor according to any one of claims 1 to 4, characterized by, Each pair of the measurement and calibration mechanisms also includes a sliding seat for simultaneously driving the measurement component and the calibration component to move; The sliding seat is fitted with a slide rail assembly.

7. The lead screw jump correction device for a lead screw stepper motor of claim 6, wherein, The slide rail assembly includes a pair of slide rails extending parallel to the lead screw axis and located on both radial sides of the lead screw, and a pair of sliding blocks adapted to slide in a one-to-one manner with the pair of slide rails. The sliding seat is simultaneously fixedly connected to a pair of sliding blocks.

8. The lead screw jump correction device for a lead screw stepper motor of claim 7, wherein, The sliding seat is fitted with at least one fixed knob suitable for loosening and tightening along the direction perpendicular to the slide rail; One of the fixed knobs is adapted to abut against a slide rail.

9. The lead screw jump correction device for a lead screw stepper motor according to any one of claims 1 to 4, characterized by, The actuating element is an elbow clamp; the straightening element is a telescopic rod connected to the elbow clamp.

10. The lead screw runout straightening device for a lead screw stepper motor according to claim 9, characterized in that, The end of the telescopic rod away from the elbow clamp is also provided with a buffer sleeve for abutting against the outer surface of the lead screw.

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