Miniature large-torque electric push rod

Abstract

The utility model relates to the technical field of electric push rods, in particular to a miniature high-torque electric push rod which comprises a shell part, an inner driving part and an inner transmission part, and a middle connecting piece is assembled between the inner driving part and the inner transmission part. The shell part comprises an upper shell part and a lower shell part which are in threaded connection; the inner driving part is assembled in the lower shell part, and the inner transmission part is assembled in the upper shell part; the inner driving part is a driving motor, the end part of the driving motor is provided with a shell part surface, the shell part surface extends outwards to form a driving shaft, and the end part of the driving shaft is a flat inserting column; the inner transmission part is a threaded rod, one end part of the threaded rod is provided with an assembly part connected with the driving shaft, and the assembly part is provided with an insertion hole matched with the flat type insertion column; according to the technology, the upper shell part and the lower shell part are assembled to form the shell part, the shell is formed in a two-section mode, the middle connecting part is reduced, the torque transmission efficiency is improved through the flat inserting column design, power transmission can be more stable during driving, and it is ensured that the threaded rod rotates.

Description

Technical Field

[0001] This utility model relates to the field of electric linear actuator technology, and in particular to a miniature high-torque electric linear actuator. Background Technology

[0002] An electric linear actuator is a mechanical device that converts the rotary motion of an electric motor into linear motion. Its core components include a motor, a transmission mechanism (such as a screw, gear, or belt), the actuator body, and a control unit. It features precise control, high load capacity, and programmability, and is widely used in industrial automation, medical equipment, and home appliances.

[0003] Existing electric linear actuators are relatively large, with a layered segmented design typically consisting of three external sections, and their internal assembly is not compact enough. Therefore, this technology designs a compact and miniature high-torque electric linear actuator. Utility Model Content

[0004] To overcome the shortcomings mentioned above, this utility model aims to provide a technical solution that can solve the above problems.

[0005] A miniature high-torque electric actuator includes a housing, an inner drive, and an inner transmission, with an intermediate connector assembled between the inner drive and inner transmission. The housing includes a threaded upper housing and a lower housing. The inner drive is assembled inside the lower housing, and the inner transmission is assembled inside the upper housing. The inner drive is a drive motor with a housing surface at its end. A drive shaft extends outward from the housing surface, and the end of the drive shaft is a flat post. The inner transmission is a threaded rod with an assembly connecting to the drive shaft at one end. The assembly has a hole for matching the flat post. A moving shaft is mounted on the surface of the threaded rod, and a rod body is externally connected to the moving shaft. A slider is provided on the outer surface of the moving shaft. A linear slide is provided on the inner surface of the upper housing, and the slider is located within the linear slide. The intermediate connector includes a coupling assembly installed at the insertion hole of the post and a fixing seat for fixing the drive motor. The outer surface of the fixing seat is threadedly fixed to the inner surface of the upper housing.

[0006] Furthermore, the coupling assembly includes a sleeve with a pin inserted through it, and the pin passes through the threaded rod for fixation.

[0007] Furthermore, the mounting base and the housing surface at the end of the drive motor are fitted with positioning screw holes, and the mounting base and the drive motor are assembled by screws.

[0008] Furthermore, a bearing is provided between the coupling assembly and the moving shaft body, which is sleeved on the surface of the threaded rod.

[0009] Furthermore, a transmission line for signal connection with the drive motor is also provided in the lower shell.

[0010] Furthermore, the upper shell end is provided with a through hole for the rod to extend and retract.

[0011] The beneficial effects of this utility model are:

[0012] (1) The assembly is compact. The outer shell is formed by assembling the upper shell and the lower shell. The outer shell is formed in two segments, reducing the intermediate connections to achieve a simple overall appearance.

[0013] (2) The drive motor and the threaded rod are assembled in a matching flat assembly. The flat plug design enhances torque transmission efficiency and makes the power transmission more stable during driving, thereby ensuring that the threaded rod rotates.

[0014] (3) While the drive motor and the threaded rod are assembled through the coupling assembly, the fixed base is used as the connection intermediate to fix the outer upper shell and the drive motor housed in the lower shell at the same time, thereby further achieving compact assembly.

[0015] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the present invention in its non-operating state.

[0017] Figure 2 This is a schematic diagram of the structure of the present invention in its working state.

[0018] Figure 3 Based on Figure 1 A schematic diagram of the decomposed structure when not in operation.

[0019] Figure 4 Based on Figure 2 A schematic diagram of the exploded structure when not in operation.

[0020] Figure 5 This is a schematic diagram of the internal transmission part and the upper shell guide transmission structure.

[0021] Figure 6 This is a schematic diagram of the connection between the internal drive section and the internal transmission section.

[0022] The labels in the attached figures are as follows:

[0023] Detailed Implementation

[0024] The technical solutions in the embodiments of this utility model will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0025] Please see Figures 1-6 This utility model includes an outer shell portion 1, an inner drive portion 2, and an inner transmission portion 3, with an intermediate connecting member 4 assembled between the inner drive portion 2 and the inner transmission portion 3; the outer shell portion 1 includes an upper shell portion 101 and a lower shell portion 102 connected by threads; the inner drive portion 2 is assembled inside the lower shell portion 102, and the inner transmission portion 3 is assembled inside the upper shell portion 101; the inner drive portion 2 is a drive motor 201, the end of the drive motor 201 is provided with a shell surface 202, and a drive shaft 203 extends outward from the shell surface 202, with the end of the drive shaft 203 being a flat insert 204; the inner transmission portion 3 is a threaded rod 301, one end of the threaded rod 301... The upper shell 101 has an assembly 302 connected to the drive shaft 203. The assembly 302 has a socket 303 for matching the flat plug 204. The threaded rod 301 is fitted with a moving shaft 304. The moving shaft 304 is connected to a rod 305. The moving shaft 304 has a slider 306 on its outer surface. The inner surface of the upper shell 101 has a linear slide 307. The slider 306 is located in the linear slide 307. The intermediate connecting member 4 includes a coupling assembly 401 installed at the insertion hole 303 of the plug 204 and a fixing seat 402 for fixing the drive motor 201. The outer surface of the fixing seat 402 is threadedly fixed to the inner surface of the upper shell 101.

[0026] The main focus of this technical solution is the assembly of the structure:

[0027] It is mainly composed of an outer shell 1, an inner drive 2, and an inner transmission 3. Specifically, the outer shell 1 includes an upper shell 101 and a lower shell 102 connected by threads. At the connection between the two, the outer surface of the upper shell 101 is provided with threads, and the inner surface of the lower shell 102 is provided with threads. After the upper shell 101 and the lower shell 102 are completed by thread assembly, the overall appearance is smooth and simple, and the internal mechanism is protected, enhancing the structural stability.

[0028] For the internal assembly, the internal drive part 2 is assembled inside the lower shell 102, and the internal transmission part 3 is assembled inside the upper shell 101. The internal drive part 2 is a drive motor 201. The end of the drive motor 201 is provided with a shell surface 202. The shell surface 202 extends outward with a drive shaft 203, and the end of the drive shaft 203 is a flat insert 204. The internal transmission part 3 is a threaded rod 301. One end of the threaded rod 301 is provided with an assembly 302 connected to the drive shaft 203. The assembly 302 is provided with a socket 303 that matches the flat insert 204. That is, with the insertion 204 and the socket 303 cooperating, the shell finally realizes power transmission. That is, when the drive motor 201 drives, the threaded rod 301 rotates synchronously. The design of the insertion 204 enhances the torque transmission efficiency.

[0029] To reinforce the assembly connection, a coupling assembly 401 and a fixing seat 402 are provided at the insertion position of the insertion post 204 into the insertion hole 303. As shown in the figure, the coupling assembly 401 mainly includes a sleeve 403 with a pin 404 inserted through it. The pin 404 passes through the threaded rod 301 for fixation. The sleeve 403 has a snap-fit ​​part that holds the assembly 302 in place, and a pin 404 that is inserted into the threaded hole for fixation. In other words, the sleeve 403 is used to secure the threaded rod 301 and the drive shaft 203 of the drive motor 201 to achieve stable power transmission and prevent radial displacement between the two. The outer surface of the fixed base 402 is threaded, and the inner surface of the upper shell 101 is threaded, that is, the fixed base 402 is threaded to the upper part. At the same time, the fixed base 402 and the shell surface 202 at the end of the drive motor 201 are matched with positioning screw holes 405. The fixed base 402 and the drive motor 201 are assembled by screws. Thus, the drive motor 201 and the upper shell 101 are further reinforced and fixed under the action of the fixed base 402, ensuring their stability.

[0030] The above describes the main structural compactness and robustness of the assembly. To achieve the electric actuator's pushing capability, a through hole 104 for the extension and retraction of the rod 305 is provided at the end of the upper shell 101. A movable shaft 304 is mounted on the surface of the threaded rod 301, with the rod 305 connected to the movable shaft 304. A slider 306 is provided on the outer surface of the movable shaft 304, and a linear slide 307 is provided on the inner surface of the upper shell 101. The slider 306 is located within the linear slide 307. The working principle of the rod 305's pushing is as follows: When the threaded rod 301 is driven to rotate by the drive motor 201, the movable shaft 304 will rotate axially synchronously. Due to the cooperation between the slider 306 on the outer surface of the movable shaft 304 and the linear slide 307 on the inner surface of the upper shell 101, the movable shaft 304 will move along the linear slide, thereby guiding the rod 305 to extend into the through hole 104 or retract.

[0031] A bearing 308 is also provided between the coupling assembly 401 and the moving shaft 304, which is sleeved on the surface of the threaded rod 301. Its purpose is to help the threaded rod 301 reduce friction and avoid radial displacement that would cause a hard collision with the inner wall of the upper shell 101.

[0032] The lower housing 102 is also provided with a transmission line 103 for signal connection with the drive motor 201, and the drive motor 201 is controlled by the transmission line 103.

[0033] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some changes or modifications to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes, and modifications made to the above embodiments based on the present utility model without departing from the scope of the present utility model shall fall within the scope of the present utility model.

Claims

1. A micro high-torque electric push rod, characterized in that: It comprises a shell part (1), an inner driving part (2) and an inner transmission part (3), and an intermediate connecting part (4) is assembled between the inner driving part (2) and the inner transmission part (3); The shell part (1) comprises a screw-connected upper shell part (101) and a lower shell part (102); the inner driving part (2) is assembled in the lower shell part (102), and the inner transmission part (3) is assembled in the upper shell part (101); The inner driving part (2) is provided as a driving motor (201), the driving motor (201) is provided with a shell part surface (202) at an end thereof, the shell part surface (202) extends outwardly with a driving shaft (203), and the driving shaft (203) is provided with a flat insertion column (204) at an end thereof; The inner transmission part (3) is provided as a threaded rod (301), one end of the threaded rod (301) is provided with an assembling part (302) connected with the driving shaft (203), the assembling part (302) is provided with a insertion hole (303) matched with the flat insertion column (204), a movable shaft body (304) is assembled on a surface of the threaded rod (301), the movable shaft body (304) is provided with a rod body (305) outside, and the movable shaft body (304) is provided with a sliding block (306) on an outer surface thereof, the upper shell part (101) is provided with a linear slide (307) on an inner surface thereof, and the sliding block (306) is located in the linear slide (307); The intermediate connecting part (4) comprises a connecting shaft assembly (401) mounted at a position where the insertion column (204) is inserted into the insertion hole (303), and a fixing seat body (402) fixed with the driving motor (201), and the fixing seat body (402) is fixed with the upper shell part (101) by screwing.

2. A micro high-torque electric push rod according to claim 1, characterized in that: The connecting shaft assembly (401) comprises a sleeve (403), the sleeve (403) is provided with a pin (404) inserted therethrough, and the pin (404) penetrates the threaded rod (301) to be fixed.

3. A micro high torque electric push rod according to claim 1, characterized in that: The fixing seat body (402) is provided with a positioning screw hole (405) matched with the shell part surface (202) at an end of the driving motor (201), and the fixing seat body (402) and the driving motor (201) are assembled by screwing.

4. A micro high-torque electric push rod according to claim 1, characterized in that: The connecting shaft assembly (401) and the movable shaft body (304) are further provided with a bearing (308) sleeved on a surface of the threaded rod (301).

5. The micro high-torque electric push rod according to claim 1, characterized in that: The lower shell part (102) is further provided with a transmission line (103) achieving signal connection with the driving motor (201).

6. A micro high torque electric push rod according to claim 1, characterized in that: The upper shell part (101) is provided with a through hole (104) at an end thereof through which the rod body (305) extends and retracts.

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