Linear transmission mechanism based on stepping motor
By using a stepper motor to drive the synchronous pulley and rotate the lead screw nut, high-precision linear displacement of the slider is achieved, which solves the problems of oil leakage and frequent maintenance of hydraulic cylinder drive, and improves the reliability and service life of the equipment.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- TIANJIN BAILI MINGTAI PACKAGING CO LTD
- Filing Date
- 2025-08-27
- Publication Date
- 2026-05-26
AI Technical Summary
Hydraulic cylinder drives pose a risk of oil leakage in linear transmission. Aging of seals can lead to oil leaks, polluting the environment and requiring frequent maintenance, which affects equipment reliability and maintenance costs.
A linear transmission mechanism based on a stepper motor is adopted. The stepper motor drives the synchronous wheel to rotate the lead screw nut, thereby achieving high-precision linear displacement of the slider. Combined with the lead screw transmission, the need for regular maintenance is avoided.
It achieves high-precision and controllable linear motion, extends the service life of the equipment, improves operational reliability, and reduces maintenance frequency and costs.
Smart Images
Figure CN224283379U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of linear drive technology, and in particular to a linear transmission mechanism based on a stepper motor. Background Technology
[0002] Linear drive technology plays a crucial role in various mechanical equipment, automation systems, and precision instruments. Currently, hydraulic cylinder drive is an important method of linear drive, offering unique advantages under heavy loads, high thrust, and harsh operating conditions. However, hydraulic cylinder drive carries the risk of oil leakage; aging seals can lead to oil leaks and environmental pollution. Furthermore, it requires regular filtration and replacement of hydraulic oil, resulting in frequent maintenance. Summary of the Invention
[0003] In view of this, this application proposes a linear transmission mechanism based on a stepper motor.
[0004] According to one aspect of this application, a linear transmission mechanism based on a stepper motor is provided, characterized in that it includes: a mounting bracket, a stepper motor, a first synchronous pulley, a second synchronous pulley, a lead screw, a lead screw nut, and a slider;
[0005] The first synchronous pulley is rotatably mounted on the inner side of the mounting frame, and the slider is mounted on the outer side wall of the mounting frame;
[0006] The output shaft of the stepper motor passes through the mounting bracket and connects to the first synchronous pulley, which is suitable for driving the first synchronous pulley to rotate;
[0007] The first synchronous pulley is connected to the second synchronous pulley via a transmission, and is suitable for driving the second synchronous pulley to rotate.
[0008] The lead screw nut is sleeved on the lead screw and threadedly connected to it. The second synchronous pulley and the mounting bracket are both sleeved on the lead screw nut and the second synchronous pulley is fixedly connected to the lead screw nut. This is suitable for driving the lead screw nut to rotate so that it moves along the length of the lead screw, thereby driving the mounting bracket and the slider to produce linear displacement.
[0009] In one possible implementation, the stepper motor and the slider are respectively positioned on opposite sides of the mounting bracket.
[0010] In one possible implementation, a connecting block is also included, through which the slider is connected to the mounting bracket.
[0011] In one possible implementation, the mounting bracket has a "Π" shaped cross-section; the first synchronous pulley is located inside the opening of the mounting bracket, one side of the mounting bracket has a threaded hole suitable for connecting the stepper motor, and the other side of the mounting bracket has a threaded hole suitable for connecting the connecting block.
[0012] In one possible implementation, a connecting ring protrudes from one side of the mounting bracket, and a lead screw nut is fitted onto the connecting ring.
[0013] In one possible implementation, a bearing is provided between the connecting ring of the mounting bracket and the lead screw nut.
[0014] One possible implementation also includes: a synchronization belt;
[0015] A timing belt is fitted with a first timing pulley and a second timing pulley, so that the first timing pulley drives the second timing pulley to rotate via the timing belt.
[0016] Beneficial effects: When the stepper motor starts working, its output shaft drives the first synchronous pulley to rotate, which in turn drives the second synchronous pulley to rotate. The second synchronous pulley then drives the lead screw nut to rotate. Since the lead screw nut is fitted onto the lead screw and threadedly connected to it, when the lead screw nut rotates on the lead screw, it simultaneously moves linearly along the lead screw, which in turn drives the mounting bracket to move linearly. The slider is suitable for connecting other structural components that need to be moved. This application uses a motor + lead screw transmission method to convert the precise rotational motion input by the stepper motor into a high-precision, controllable linear displacement of the slider, thereby driving other structural components on the slider to produce stable linear motion. Compared to hydraulic cylinder transmission technology, this application does not require special periodic maintenance, has a long service life, high reliability, and can effectively save maintenance costs.
[0017] Other features and aspects of this application will become clear from the following detailed description of exemplary embodiments with reference to the accompanying drawings. Attached Figure Description
[0018] The accompanying drawings, which are included in and form part of this specification, illustrate exemplary embodiments, features, and aspects of this application together with the specification and serve to explain the principles of this application.
[0019] Figure 1 This diagram shows the main structure of a linear transmission mechanism based on a stepper motor according to an embodiment of this application.
[0020] Figure 2 This diagram shows the main structure of a linear transmission mechanism based on a stepper motor according to an embodiment of this application.
[0021] Figure 3 A partial structural diagram of a linear transmission mechanism based on a stepper motor according to an embodiment of this application is shown;
[0022] Figure 4 A partial structural diagram of a linear transmission mechanism based on a stepper motor according to an embodiment of this application is shown;
[0023] Figure 5This diagram illustrates the main structure of the second mounting plate according to an embodiment of this application.
[0024] Figure 6 This diagram shows the main structure of the connecting plate according to an embodiment of this application.
[0025] Mounting bracket 100, stepper motor 200, first synchronous pulley 500, second synchronous pulley 600, lead screw 400, lead screw nut 410, slider 300, connecting block 700, first mounting plate 110, second mounting plate 120, bearing 420, synchronous belt 800. Detailed Implementation
[0026] Various exemplary embodiments, features, and aspects of the present invention will now be described in detail with reference to the accompanying drawings. The same reference numerals in the drawings denote elements that have the same or similar functions. Although various aspects of the embodiments are shown in the drawings, they are not necessarily drawn to scale unless specifically indicated otherwise.
[0027] It should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model or 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.
[0028] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.
[0029] The term “exemplary” as used herein means “serving as an example, embodiment, or illustration.” Any embodiment illustrated herein as “exemplary” is not necessarily to be construed as superior to or better than other embodiments.
[0030] Furthermore, to better illustrate this utility model, numerous specific details are provided in the following detailed embodiments. Those skilled in the art should understand that this utility model can be implemented even without certain specific details. In some instances, methods, means, components, and circuits well-known to those skilled in the art have not been described in detail, in order to highlight the main points of this utility model.
[0031] Figure 1 This diagram shows the main structure of a linear transmission mechanism based on a stepper motor according to an embodiment of this application. Figure 2 This diagram shows the main structure of a linear transmission mechanism based on a stepper motor according to an embodiment of this application. Figure 3 A partial structural diagram of a linear transmission mechanism based on a stepper motor according to an embodiment of this application is shown; Figure 4 This application shows a partial structural diagram of a linear transmission mechanism based on a stepper motor, according to an embodiment of the present application; as shown. Figure 1 As shown, a linear transmission mechanism based on a stepper motor includes: a mounting frame 100, a stepper motor 200, a first synchronous pulley 500, a second synchronous pulley 600, a lead screw 400, a lead screw nut 410, and a slider 300. The first synchronous pulley 500 is rotatably disposed on the inner side of the mounting frame 100, and the slider 300 is disposed on the outer side wall of the mounting frame 100. The output shaft of the stepper motor 200 passes through the mounting frame 100 and is connected to the first synchronous pulley 500 to drive the first synchronous pulley 500 to rotate. The first synchronous pulley 500 and the second synchronous pulley 600... The transmission connection is suitable for driving the second synchronous pulley 600 to rotate; the lead screw nut 410 is sleeved on the lead screw 400 and threadedly connected to the lead screw 400. The two ends of the lead screw 400 are suitable for being fixedly installed in the position to be installed. The second synchronous pulley 600 and the mounting bracket 100 are both sleeved on the lead screw nut 410 and the second synchronous pulley 600 is fixedly connected to the lead screw nut 410. This is suitable for driving the lead screw nut 410 to rotate so that it moves along the length of the lead screw 400, thereby driving the mounting bracket 100 and the slider 300 to produce linear displacement.
[0032] It should be noted that the mounting bracket 100 proposed in this application is suitable for providing a mounting base for the first synchronous pulley 500, the stepper motor 200, and the slider 300. Under the connecting action of the mounting bracket 100, the slider 300, the first synchronous pulley 500, the second synchronous pulley 600, and the stepper motor 200 can move linearly together. Furthermore, when the stepper motor 200 starts working, its output shaft drives the first synchronous pulley 500 to rotate, the first synchronous pulley 500 drives the second synchronous pulley 600 to rotate, and the second synchronous pulley 600 drives the lead screw nut 410 to rotate. The lead screw nut 410 is sleeved on the lead screw 400 and threadedly connected to the lead screw 400. Since the two ends of the lead screw 400 are fixed and the lead screw 400 cannot rotate, when the lead screw nut 410 rotates on the lead screw 400, it will simultaneously move linearly on the lead screw 400. Since the mounting bracket 100 is connected to the lead screw nut 410, the lead screw nut 410 will drive the mounting bracket 100 to move linearly. The slider 300 is suitable for connecting other structural components that need to be moved. This application uses a motor + lead screw 400 transmission method to convert the precise rotational motion output by the stepper motor 200 into the high-precision, controllable linear displacement of the slider 300, so as to drive other structural components on the slider 300 to produce stable linear displacement. Compared with hydraulic cylinder transmission technology, this application does not require special periodic maintenance, the overall structure has a long service life, high reliability, and can effectively save maintenance costs.
[0033] In one possible implementation, the stepper motor 200 and the slider 300 are respectively disposed on opposite sides of the mounting bracket 100.
[0034] In one possible implementation, a connecting block 700 is also included, through which the slider 300 is connected to the mounting bracket 100. It should be noted that the connecting block 700 is used to connect and fix the slider 300 to the mounting bracket 100, and the slider 300 can be connected to other structural components that need to be moved via the connecting block 700. Further, such as... Figure 6As shown, the main body of the connecting block 700 is a rectangular block structure. One end of the connecting block 700 has two screw holes 710 for connecting to the mounting bracket 100, so as to connect to the mounting bracket 100 by screw connection. The connecting block 700 also has four screw holes 720 for connecting to the slider 300 and two screw holes 730 for connecting to other structural components. One side of the connecting block 700 is connected to the slider 300 by screw connection, and the side of the connecting block 700 away from the slider 300 is connected to other structural components by screw connection. In this way, the slider 300 is connected to other structural components through the connecting action of the connecting block 700. The side of the slider 300 away from the connecting block 700 is suitable for connecting to a slide rail that is compatible with it. When the mounting bracket 100 makes linear displacement, it can drive the slider 300 to move on the slide rail, so as to improve the movement stability of other structural components on the other side of the connecting block 700.
[0035] In one possible implementation, such as Figure 4 As shown, the mounting bracket 100 has a "Π" shaped cross-section; the first synchronous pulley 500 is located inside the opening of the mounting bracket 100. One side of the mounting bracket 100 has multiple mounting holes 112 for connecting the stepper motor 200 and a circular through hole 111 for the output shaft of the stepper motor 200 to pass through. The other side of the mounting bracket 100 has multiple threaded holes 123 for connecting the connecting block 700. The mounting bracket 100 is connected to the housing of the stepper motor 200 by four screws; the connecting block 700 is connected to the mounting bracket 100 by two screws.
[0036] Furthermore, such as Figure 1 As shown, the mounting bracket 100 includes: a first mounting plate 110 and a second mounting plate 120 that are detachably connected; the main body of the first mounting plate 110 has an "L"-shaped folded plate structure, and the second mounting plate 120 is vertically disposed on the bottom surface of the first mounting plate 110; as shown Figure 4 and Figure 5 As shown, the top surface of the first mounting plate 110 has three threaded holes 113, and the top surface of the second mounting plate 120 has three threaded holes 122. The first mounting plate 110 is suitable for being fixedly connected to the second mounting plate 120 by three screws.
[0037] Furthermore, such as Figure 4 As shown, there are four mounting holes 112, which are respectively opened at the four corners of the side of the first mounting plate 110. The mounting holes 112 are oblong holes, and the length direction of the oblong holes 112 is perpendicular to the length direction of the lead screw 400. They are suitable for fine-tuning the position of the stepper motor 200 on the first mounting plate 110. The through hole 111 is opened in the middle of the side of the first mounting plate 110.
[0038] In one possible implementation, such as Figure 5 As shown, a connecting ring 121 protrudes from one side of the mounting bracket 100, and a lead screw nut 410 is fitted onto the connecting ring 121. Furthermore, the main body of the connecting ring 121 has a circular ring structure, and the connecting ring 121 is located at the bottom of the second mounting plate 120 and is integrally formed with the second mounting plate 120.
[0039] In one possible implementation, the second mounting plate 120 has a slot 124 on one side of the connecting block 700, and the end of the connecting block 700 can be embedded in the slot 124 to limit the position of the connecting block 700.
[0040] Preferably, a bearing 420 is provided between the connecting ring 121 of the mounting bracket 100 and the lead screw nut 410. For example... Figure 4 As shown, the inner ring of the bearing 420 is fitted onto the lead screw nut 410, and the connecting ring 121 is fitted onto the outer side of the bearing 420. Under the action of the bearing 420, the smoothness of the lead screw nut 410 during rotation can be improved and wear between the lead screw nut 410 and the connecting ring 121 can be avoided.
[0041] In one possible implementation, the lead screw nut 410 has a convex cross-section, and a screw hole for the lead screw 400 to pass through is provided on the central axis of the lead screw nut 419. The lead screw nut 410 is fixed to the second synchronous pulley 600, and the protrusion at the end of the lead screw nut 410 is used to limit the second mounting plate 120 and the bearing 420 to prevent them from falling off.
[0042] like Figure 3 As shown, a flat slot 510 is provided in the middle of the first synchronous pulley 500. The output shaft of the stepper motor 200 is suitable for being inserted into the flat slot 510 and engaging with the first synchronous pulley 500, so as to ensure that the first synchronous pulley 500 can be driven to rotate when the output shaft rotates.
[0043] In one possible implementation, it further includes: a timing belt 800; the timing belt 800 sleeves a first timing pulley 500 and a second timing pulley 600, so that the first timing pulley 500 drives the second timing pulley 600 to rotate via the timing belt 800. For example... Figure 3 As shown, the first synchronous pulley 500 and the second synchronous pulley 600 are connected by a belt drive. The inner side of the synchronous belt 800 is provided with a sawtooth structure, and the outer sides of the first synchronous pulley 500 and the second synchronous pulley 600 are also provided with matching sawtooth structures. The synchronous belt 800 is engaged with the first synchronous pulley 500 and the second synchronous pulley 600. When the first synchronous pulley 500 rotates, it drives the synchronous belt 800 to move, and the synchronous belt 800 drives the second synchronous pulley 600 to rotate.
[0044] In one possible implementation, the diameter of the second synchronous pulley 600 is larger than the diameter of the first synchronous pulley 500. Preferably, the transmission ratio between the first synchronous pulley 500 and the second synchronous pulley 600 is 2:1.
[0045] The various embodiments of the present invention have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or improvement of the technology in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.
Claims
1. A linear transmission mechanism based on a stepper motor, characterized in that, include: Mounting bracket, stepper motor, first synchronous pulley, second synchronous pulley, lead screw, lead screw nut, slider; The first synchronous pulley is rotatably disposed on the inner side of the mounting frame, and the slider is disposed on the outer side wall of the mounting frame; The output shaft of the stepper motor passes through the mounting bracket and is connected to the first synchronous pulley, which is suitable for driving the first synchronous pulley to rotate. The first synchronous pulley is connected to the second synchronous pulley via a transmission, and is suitable for driving the second synchronous pulley to rotate; The lead screw nut is sleeved on the lead screw and threadedly connected to the lead screw. The second synchronous pulley and the mounting bracket are both sleeved on the lead screw nut, and the second synchronous pulley is fixedly connected to the lead screw nut. This allows the lead screw nut to rotate so that it moves along the length of the lead screw, thereby causing the mounting bracket and the slider to produce linear displacement.
2. The linear transmission mechanism based on a stepper motor according to claim 1, characterized in that, The stepper motor and the slider are respectively disposed on opposite sides of the mounting bracket.
3. The linear transmission mechanism based on a stepper motor according to claim 2, characterized in that, Also includes: A connecting block is provided, through which the slider is connected to the mounting bracket.
4. The linear transmission mechanism based on a stepper motor according to claim 3, characterized in that, The mounting bracket has a "Π" shaped cross-section; the first synchronous pulley is located inside the opening of the mounting bracket; one side of the mounting bracket has a threaded hole suitable for connecting the stepper motor; and the other side of the mounting bracket has a threaded hole suitable for connecting the connecting block.
5. The linear transmission mechanism based on a stepper motor according to claim 4, characterized in that, One side of the mounting bracket has a protruding connecting ring, and the connecting ring is fitted with the lead screw nut.
6. The linear transmission mechanism based on a stepper motor according to claim 5, characterized in that, A bearing is provided between the connecting ring of the mounting bracket and the lead screw nut.
7. The linear transmission mechanism of the stepper motor according to claim 1, characterized in that, Also includes: Synchronous belt; The timing belt is fitted over the first timing pulley and the second timing pulley, so that the first timing pulley drives the second timing pulley to rotate via the timing belt.
8. The linear transmission mechanism of the stepper motor according to claim 1, characterized in that, The diameter of the second synchronous pulley is larger than the diameter of the first synchronous pulley.