An electric push rod driven by a stepping motor

Abstract

The utility model discloses a kind of electric push rod of step motor drive, including drive component, the output end of drive component movably is provided with telescopic component, drive component one end detachably installs limit component, telescopic component is limitedly active in limit component, limit component movably is provided with positioning component, drive component includes motor component, motor component includes step motor, the output end of step motor is connected with output shaft, output shaft is provided with screw rod, telescopic component is connected with screw rod threadedly.The utility model is adjusted on the setting of adjustable position in shell, and adjusting plate is adjusted, and trigger component is adjustably provided on the both ends of adjusting plate, when profiled bolt moves on screw rod with hollow shaft, the protruding block of profiled bolt side can move in shell, when protruding block touches the trigger component of most top or most bottom, trigger component then sends electric signal to controller, to limit the telescopic limit of electric push rod in this way.

Description

Technical Field

[0001] This utility model relates to the field of electric linear actuator technology, specifically an electric linear actuator driven by a stepper motor. Background Technology

[0002] A stepper motor is a type of electric motor that converts electrical pulse signals into corresponding angular or linear displacement. For each input pulse signal, the rotor rotates by an angle or moves forward one step. The output angular or linear displacement is proportional to the number of input pulses, and the rotational speed is proportional to the pulse frequency. Therefore, stepper motors are also called pulse motors, and they can drive electric actuators to extend and retract relatively stably.

[0003] Currently, electric linear actuators can generally only perform simple extension and retraction functions. However, electric linear actuators used in some precision instruments require the electrical signal of the extension and retraction limit to make the next set action. Most current electric linear actuators cannot meet the requirements, which reduces the practicality of existing electric linear actuators. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a stepper motor driven electric linear actuator, thus solving the above-mentioned technical problems.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a stepper motor-driven electric linear actuator, comprising a drive assembly, a telescopic component movably disposed at the output end of the drive assembly, a limit component detachably mounted at one end of the drive assembly near the telescopic component, the telescopic component being limited within the limit component, a positioning component movably disposed within the limit component, the positioning component being used to position and control the telescopic limit of the telescopic component, the drive assembly including a motor assembly including a stepper motor, the output end of the stepper motor connected to an output shaft, a lead screw disposed on the output shaft, and the telescopic component threadedly connected to the lead screw. The threaded connection between the telescopic component and the lead screw allows the lead screw to directly move the telescopic component during rotation, improving the integrity of the internal structure of the stepper motor-driven electric linear actuator.

[0006] Furthermore, the positioning component includes an adjustment plate movably mounted on the limiting component. The adjustment plate has multiple rectangular slots, and trigger components are detachably mounted on both sides of the adjustment plate. The trigger components are mounted on the adjustment plate through the rectangular slots. An electrical plate is located at the end of the positioning component near the drive component. A wire is electrically connected to the electrical plate, and the wire is electrically connected to the controller. The trigger components are electrically connected to the electrical plate. This electrical connection between the trigger components and the electrical plate allows the electrical signal to be directly transmitted through the electrical plate when the trigger components are triggered, improving the intelligence of the stepper motor-driven electric linear actuator.

[0007] Furthermore, the triggering component includes a micro switch with a button at the end of the micro switch away from the adjustment plate. The movable telescopic component triggers the micro switch by pressing the button. A protruding plate is provided at the end of the micro switch away from the button, and the micro switch is mounted on the adjustment plate via the protruding plate. This mounting of the micro switch on the adjustment plate allows the user to adjust its position according to specific usage conditions, improving the practicality of the stepper motor-driven electric linear actuator.

[0008] Furthermore, a connecting plate is bolted to one end of the motor assembly near the lead screw, and the connecting plate is provided with multiple fixing screws. A coupling is connected to the end of the output shaft away from the stepper motor, and the lead screw is connected to the end of the coupling away from the stepper motor. The telescopic assembly includes a hollow shaft, and a shaped bolt is installed at the end of the hollow shaft near the stepper motor. The shaped bolt has protrusions on both sides, and a strip is provided above one of the protrusions. The shaped bolt is threadedly connected to the lead screw. This threaded connection ensures that the shaped bolt rotates along with the lead screw when it rotates, improving the integrity of the internal structure of the stepper motor-driven electric actuator.

[0009] Furthermore, the stepper motor has an electrical socket on its top for connecting an adapter, and a mounting plate is fixedly installed on the end of the stepper motor away from the output shaft. The mounting plate is used for mounting the stepper motor.

[0010] Furthermore, the limiting component includes a housing, with limiting grooves on both sides inside the housing for limiting the movement of the irregular bolts. Threaded grooves are provided at the four corners inside the housing, which are adapted to the fixing screws. Movable grooves are also provided inside the housing, and the adjusting plate is movably mounted on the movable groove.

[0011] Furthermore, the hollow shaft has a mounting hole at the end away from the shaped bolt, and the hollow shaft is connected to the external structure through the mounting hole. Beneficial effects

[0012] Compared with the prior art, the present invention has the following beneficial effects: This invention features an adjustable plate within the housing, with adjustable trigger components at both ends. When the shaped bolt moves along the lead screw with the hollow shaft, a protrusion on one side of the bolt moves within the housing. When the protrusion touches the trigger component at the top or bottom, the trigger component sends an electrical signal to the controller to position the extension limit of the electric linear actuator, thus enhancing the intelligence of the stepper motor-driven electric linear actuator. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of an electric push rod driven by a stepper motor according to the present invention; Figure 2 This is a three-dimensional structural diagram of the positioning component of this utility model; Figure 3 This is a partially enlarged three-dimensional structural diagram of A of this utility model; Figure 4 This is a three-dimensional structural diagram of the drive component of this utility model; Figure 5 This is a three-dimensional structural diagram of the motor assembly of this utility model; Figure 6 This is a three-dimensional structural diagram of the limiting component and the telescopic component of this utility model.

[0014] In the diagram: Drive assembly 1, Positioning assembly 2, Limiting assembly 3, Telescopic assembly 4, Wire 21, Controller 22, Electrical board 23, Trigger assembly 24, Adjusting plate 25, Rectangular slot 26, Micro switch 241, Button 242, Protruding plate 243, Motor assembly 11, Connecting plate 12, Fixing screw 13, Coupling 14, Lead screw 15, Electrical socket 111, Mounting plate 112, Stepper motor 113, Output shaft 114, Mounting hole 41, Hollow shaft 42, Special bolt 43, Movable slot 31, Limiting slot 32, Threaded slot 33, Housing 34. Detailed Implementation

[0015] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0016] Example The following is in conjunction with the appendix Figure 1 - Appendix Figure 6This application provides a further detailed description. An electric actuator driven by a stepper motor includes a drive assembly 1. A telescopic assembly 4 is movably mounted at the output end of the drive assembly 1. A limit assembly 3 is detachably mounted at one end of the drive assembly 1 near the telescopic assembly 4. The telescopic assembly 4 is limited within the limit assembly 3. A positioning assembly 2 is movably mounted within the limit assembly 3, used to position and control the telescopic limit of the telescopic assembly 4. The drive assembly 1 includes a motor assembly 11, which includes a stepper motor 113. An output shaft 114 is connected to the output end of the stepper motor 113. A lead screw 15 is mounted on the output shaft 114. The telescopic assembly 4 is threadedly connected to the lead screw 15. The positioning assembly 2 includes components movably mounted on the limit assembly 3. An adjustment plate 25 is provided on the upper part of the device. Multiple rectangular slots 26 are provided on the adjustment plate 25. Trigger components 24 are detachably mounted on both sides of the adjustment plate 25, and are installed on the adjustment plate 25 through the rectangular slots 26. An electrical plate 23 is provided at the end of the positioning component 2 near the drive component 1. A wire 21 is electrically connected to the electrical plate 23, and the wire 21 is electrically connected to the controller 22. The trigger components 24 are electrically connected to the electrical plate 23. The trigger component 24 includes a micro switch 241. A button 242 is provided at the end of the micro switch 241 away from the adjustment plate 25. The movable telescopic component 4 triggers the micro switch 241 by pressing the button 242. One end is provided with a protruding plate 243, and a micro switch 241 is mounted on an adjusting plate 25 through the protruding plate 243. A connecting plate 12 is bolted to the end of the motor assembly 11 near the lead screw 15. Multiple fixing screws 13 are provided on the connecting plate 12. A coupling 14 is connected to the end of the output shaft 114 away from the stepper motor 113, and the lead screw 15 is connected to the end of the coupling 14 away from the stepper motor 113. The telescopic assembly 4 includes a hollow shaft 42. A special-shaped bolt 43 is installed at the end of the hollow shaft 42 near the stepper motor 113. Protrusions are provided on both sides of the special-shaped bolt 43, and a strip is provided above one of the protrusions on the special-shaped bolt 43. The special-shaped bolt 43 is threadedly connected to the lead screw 15. The stepper motor 113 is topped with... The part is provided with an electrical socket 111 for connecting the adapter. The end of the stepper motor 113 away from the output shaft 114 is fixedly mounted with a mounting plate 112. The mounting plate 112 is used for mounting the stepper motor 113. The limiting component 3 includes a housing 34. Limiting grooves 32 are opened on both sides inside the housing 34. The limiting grooves 32 are used for limiting the movement of the special bolt 43. Threaded grooves 33 are opened at the four corners inside the housing 34. The threaded grooves 33 are adapted to the fixing screw 13. The housing 34 also has a movable groove 31. The adjusting plate 25 is movably mounted on the movable groove 31. The end of the hollow shaft 42 away from the special bolt 43 has a mounting hole 41. The hollow shaft 42 is connected to the external structure through the mounting hole 41.

[0017] The working principle of controller 22 can be divided into four basic steps: input, processing, output, and feedback. First, controller 22 receives input signals from external devices or users, such as button presses or information detected by sensors. Next, controller 22 processes the input signals, performs calculations and judgments according to the set algorithms and logic, and then generates corresponding output signals based on the processing results to control the working status and display information of external devices. Since controller 22 is electrically connected to electrical board 23, and electrical board 23 is electrically connected to micro switch 241, when micro switch 241 is pressed, micro switch 241 can directly transmit electrical signals to controller 22 through electrical board 23, which improves the intelligence of the stepper motor driven electric actuator.

[0018] Since the micro switch 241 is provided with a protruding plate 243 and the adjustment plate 25 is provided with multiple rectangular slots 26, the user can adjust the position of the micro switch 241 on the adjustment plate 25 according to the specific usage situation. Simply insert the protruding plate 243 behind the micro switch 241 into the rectangular slot 26 in the adjustment plate 25, which improves the adjustability of the internal structure of the electric push rod driven by the stepper motor.

[0019] The working principle of the micro switch 241 is as follows: external mechanical force is applied to the action spring through transmission elements such as pins, buttons, levers, and rollers. When the action spring is displaced to the critical point, it generates an instantaneous action, causing the moving contact at the end of the action spring to quickly connect or disconnect with the fixed contact. Since the protrusions on both sides of the irregular bolt 43 are limited to move within the limiting groove 32 of the housing 34, when the irregular bolt 43 is driven by the lead screw 15, the irregular bolt 43 will move with the hollow shaft 42 within the housing 34. When the irregular bolt 43 passes the trigger component 24, the strip on the irregular bolt 43 can press the button 242 on the micro switch 241, so that the micro switch 241 transmits an electrical signal to the controller 22, thereby improving the intelligence of the electric push rod driven by the stepper motor.

[0020] Since microswitches 241 are installed on both sides of the adjustment plate 25, the user can set a buzzer in the controller 22 so that the buzzer in the controller 22 will sound when the irregular bolt 43 contacts the button 242 on the micro switch 241. Other structures can also be connected to the controller 22 so that the structure will be triggered when the irregular bolt 43 contacts the button 242 on the micro switch 241, thus improving the adjustability of the electric push rod driven by the stepper motor.

[0021] The working principle of this utility model is explained below: Unless otherwise specified, all internal mechanical structures of the stepper motor-driven electric actuator are threaded. To allow for a more intuitive observation of the technical features, bolt connections are appropriately concealed in the figures. During use, the user can install the stepper motor-driven electric actuator in the desired position using the mounting plate 112. The user can install external structures onto the stepper motor-driven electric actuator through the mounting holes 41 on the hollow shaft 42. When the stepper motor 113 rotates with the output shaft 114, the output shaft 114 rotates with the lead screw 15 via the coupling 14. Since the shaped bolt 43 is positioned within the outer casing 34 and is threadedly connected to the lead screw 15, the shaped bolt 43 can move within the outer casing 34. Before use, the user should position the stepper motor-driven electric actuator... Component 2 is installed inside the housing 34, and the adjusting plate 25 is riveted to the movable slot 31. Therefore, when the moving irregular bolt 43 contacts the trigger component 24, the bar on the irregular bolt 43 will press the button 242 and transmit an electrical signal to the controller 22 through the electrical plate 23. At this time, the controller 22 can make a corresponding response. With the cooperation of the above structure, when the stepper motor driven electric linear actuator is in use, when the irregular bolt moves on the lead screw with the hollow shaft, the protrusion on one side of the irregular bolt will move inside the housing. When the protrusion touches the trigger component at the top or bottom, the trigger component sends an electrical signal to the controller to locate the extension limit of the electric linear actuator. At the same time, it can trigger the controller 22 to perform corresponding actions, which improves the intelligence of the stepper motor driven electric linear actuator. The user can also know the extension limit of the stepper motor driven electric linear actuator, which improves the practicality of the stepper motor driven electric linear actuator.

[0022] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

Claims

1. A stepper motor driven electric linear actuator, characterized in that, The device includes a drive assembly (1), the output end of which is movably provided with a telescopic assembly (4). A limit assembly (3) is detachably installed on one end of the drive assembly (1) near the telescopic assembly (4). The telescopic assembly (4) is limited within the limit assembly (3). A positioning assembly (2) is movably provided within the limit assembly (3). The positioning assembly (2) is used to position and control the telescopic limit of the telescopic assembly (4). The drive assembly (1) includes a motor assembly (11), which includes a stepper motor (113). The output end of the stepper motor (113) is connected to an output shaft (114). A lead screw (15) is provided on the output shaft (114). The telescopic assembly (4) is threadedly connected to the lead screw (15).

2. The stepper motor driven electric linear actuator according to claim 1, characterized in that: The positioning component (2) includes an adjustment plate (25) movably mounted on the limiting component (3). The adjustment plate (25) has multiple rectangular slots (26). Trigger components (24) are detachably mounted on both sides of the adjustment plate (25). The trigger components (24) are mounted on the adjustment plate (25) through the rectangular slots (26). An electrical plate (23) is provided at one end of the positioning component (2) near the driving component (1). A wire (21) is electrically connected to the electrical plate (23). The wire (21) is electrically connected to the controller (22). The trigger component (24) is electrically connected to the electrical plate (23).

3. The stepper motor driven electric linear actuator according to claim 2, characterized in that: The triggering component (24) includes a micro switch (241), and a button (242) is provided at the end of the micro switch (241) away from the adjustment plate (25). The movable telescopic component (4) triggers the micro switch (241) by pressing the button (242). A protrusion plate (243) is provided at the end of the micro switch (241) away from the button (242). The micro switch (241) is mounted on the adjustment plate (25) through the protrusion plate (243).

4. The stepper motor driven electric linear actuator according to claim 2, characterized in that: The motor assembly (11) is bolted to a connecting plate (12) at one end near the lead screw (15). The connecting plate (12) is provided with multiple fixing screws (13). The output shaft (114) is connected to a coupling (14) at one end away from the stepper motor (113). The coupling (14) is connected to the lead screw (15) at one end away from the stepper motor (113). The telescopic assembly (4) includes a hollow shaft (42). A special-shaped bolt (43) is installed at one end of the hollow shaft (42) near the stepper motor (113). The special-shaped bolt (43) has protrusions on both sides. A strip is provided above one of the protrusions on the special-shaped bolt (43). The special-shaped bolt (43) is threaded to the lead screw (15).

5. The stepper motor driven electric linear actuator according to claim 1, characterized in that: The stepper motor (113) has an electrical socket (111) for connecting an adapter on its top. A mounting plate (112) is fixedly installed on one end of the stepper motor (113) away from the output shaft (114). The mounting plate (112) is used for mounting the stepper motor (113).

6. The stepper motor driven electric linear actuator according to claim 4, characterized in that: The limiting component (3) includes a housing (34), and limiting grooves (32) are provided on both sides inside the housing (34). The limiting grooves (32) are used for limiting the movement of the irregular bolts (43). Threaded grooves (33) are provided at the four corners inside the housing (34). The threaded grooves (33) are adapted to the fixing screws (13). Movable grooves (31) are also provided inside the housing (34). The adjusting plate (25) is movably installed on the movable groove (31).

7. The stepper motor driven electric linear actuator according to claim 4, characterized in that: The hollow shaft (42) has a mounting hole (41) at the end away from the shaped bolt (43), and the hollow shaft (42) is connected to the external structure through the mounting hole (41).

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