Compact push rod motor structure

Abstract

The utility model discloses a compact push rod motor structure, which solves the problem that an existing push rod motor is easy to damage without a buffer device. The device comprises a mounting box, a shielding box and a driving assembly, the driving assembly comprises a threaded rod and a micro direct current motor, an output shaft of the micro direct current motor is connected with the threaded rod, the threaded rod is in threaded connection with a threaded sleeve, the threaded sleeve is connected with a connecting rod, the end face of the connecting rod is connected with a limiting ring, and an inserting rod is inserted into the inner ring face of the limiting ring; the end face of the inserting rod is connected with a hollow fixing rod, the inner side wall of the fixing rod is in sliding connection with the limiting ring, a damper is installed in an inner cavity formed in the connecting rod, a piston part of the damper is connected with the inserting rod, and the inserting rod is in sliding connection with the inner cavity of the connecting rod. The damper provided by the utility model provides a buffering and damping effect on the fixed rod, reduces rigid impact on the output shaft of the micro direct current motor, prevents parts of the push rod motor structure from being damaged, and prolongs the service life of the push rod motor structure.

Description

Technical Field

[0001] This utility model relates to a device for converting reciprocating motion into rotary motion or performing the reverse conversion, and in particular to a compact push rod motor structure. Background Technology

[0002] We know that with the continuous development of the automotive industry, refrigerators are installed inside cars to provide a comfortable travel environment. Opening the refrigerator requires an unlocking motor. A push-rod motor can adapt to the space constraints of unlocking motors, and therefore, many engineers have researched and developed compact push-rod motor structures. For example, the Chinese utility model patent specification CN222192042U, published on December 17, 2024, discloses a "compact push-rod motor structure" applicable to car interior refrigerators. It includes: a housing, a motor, and a transmission assembly. The housing has a hollow structure, and the motor and transmission assembly are fixedly installed inside the housing cavity. The transmission assembly includes a worm gear, a fixed sleeve, a worm wheel, a rack, a spring, and a push rod. The compact push-rod motor structure disclosed in the published document uses the transmission assembly to transmit torque, controlling the extension and retraction of the push rod to achieve the pushing function. It is low-cost and occupies little space. However, the output end of this push-rod motor structure lacks a buffer device, making it highly susceptible to damage from external forces during use, thus shortening the lifespan of the push-rod motor structure. Summary of the Invention

[0003] To address the shortcomings of existing push rod motors lacking buffer devices, which can easily lead to damage to motor components due to external forces, the purpose of this utility model is to provide a compact push rod motor structure with reliable vibration reduction and buffering.

[0004] To achieve the above objectives, the technical solution adopted by this utility model to solve its technical problem is as follows: A compact push rod motor structure, comprising:

[0005] The mounting box has a hollow shielding box connected to its outer wall;

[0006] The drive assembly includes a threaded rod and a miniature DC motor for providing power. The output shaft of the miniature DC motor is connected to the threaded rod via a coupling. The threaded rod is threadedly connected to a threaded sleeve, and a connecting rod is connected to the end face of the threaded sleeve. A limit ring is connected to the end face of the connecting rod, and a plug rod is inserted into the inner ring of the limit ring. A hollow fixing rod is connected to the end face of the plug rod, and the inner side wall of the fixing rod is slidably connected to the limit ring. The connecting rod has an inner cavity, and a damper is installed in the inner cavity of the connecting rod. The piston part of the damper is connected to the plug rod, and the plug rod is slidably connected to the inner cavity of the connecting rod.

[0007] Preferably, the end face of the fixed rod is slidably embedded in the connecting rod.

[0008] Preferably, the side of the mounting box near the shielding box is slidably connected to the threaded sleeve, and the side of the shielding box away from the mounting box has a through hole for the threaded sleeve and the fixing rod to pass through.

[0009] Preferably, the threaded sleeve has two symmetrically arranged movable plates connected to its side. The movable plates are symmetrically embedded with sliding limit rods, and both ends of the limit rods are fixed to the inner sidewall of the mounting box.

[0010] Preferably, C-shaped movable frames are connected to both ends of the movable plate. The inner sidewalls of the movable frames are arranged centrifugally, and limit plates are slidably connected to the inner sidewalls of the movable frames. The centrifugally positioned side of the limit plates is connected to the corresponding inner wall of the mounting box.

[0011] Preferably, the mounting box has two pairs of mounting ears connected to its side, which are symmetrically distributed on both sides of the mounting box.

[0012] Compared with existing technologies, the technical effects and advantages of this utility model are as follows: The micro DC motor provides power, and the rotation of its output shaft drives the threaded rod to rotate, causing the threaded sleeve to move along the threaded path of the threaded rod. This, in turn, pushes the fixed rod to extend out of the shielding box via the connecting rod, realizing the telescopic and unlocking function of the push rod motor structure. When the fixed rod is subjected to external force, it moves, causing the connecting rod to move the limiting ring within the inner cavity of the fixed rod. Simultaneously, the plug-in rod connected within the inner cavity of the fixed rod extends into the inner cavity of the connecting rod through the inner ring of the limiting ring, compressing the moving end of the damper and causing it to work. This provides a buffering and shock-absorbing effect on the fixed rod, while also reducing the rigid impact on the output shaft of the micro DC motor, preventing damage to the components of the push rod motor structure, and extending the service life of the push rod motor structure. Attached Figure Description

[0013] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 This is a partial structural diagram of the present invention after the lid has been removed;

[0016] Figure 3 This is a schematic diagram of the drive component of this utility model;

[0017] Figure 4 For the present utility model Figure 3 Enlarged view of the structure at point A in the middle;

[0018] Figure 5 This is a partial structural diagram of the connecting rod and fixing rod of this utility model.

[0019] The markings in the diagram are: 1. Mounting box, 2. Shielding box, 3. Drive assembly, 4. Miniature DC motor, 5. Threaded rod, 6. Threaded sleeve, 7. Connecting rod, 8. Limiting ring, 9. Fixing rod, 10. Insertion rod, 11. Damper, 12. Moving plate, 13. Moving frame, 14. Limiting rod, 15. Limiting plate, 16. Mounting ear, 17. Through hole. Detailed Implementation

[0020] In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. However, it will be apparent to those skilled in the art that the present invention can be practiced without one or more of these details. In other instances, certain technical features well-known in the art have not been described in order to avoid confusion with the present invention.

[0021] Unless otherwise defined, the directions mentioned herein, such as up, down, left, right, front, back, inside, and outside, are based on the directions shown in the figures of this utility model, and are explained here together.

[0022] The connection method can be any existing method, such as bonding, welding, or bolting, depending on the actual needs.

[0023] exist Figure 1 , Figure 2 and Figure 3 In the present invention, a compact push rod motor structure includes: a mounting box 1 and a drive assembly 3.

[0024] like Figure 1 , Figure 2 As shown, a hollow shielding box 2 is connected to the outer wall of the mounting box 1.

[0025] like Figure 3 , Figure 4 As shown, the drive assembly 3 includes a threaded rod 5 and a miniature DC motor 4 for providing power. The fixed end of the miniature DC motor 4 is connected to the mounting box 1 by a set screw, thereby fixing the position of the miniature DC motor 4.

[0026] exist Figure 3 , Figure 4 , Figure 5 In the middle, the output shaft of the micro DC motor 4 is connected to the threaded rod 5 through a coupling, and the threaded rod 5 is threadedly connected to the threaded sleeve 6.

[0027] exist Figure 3 , Figure 5 In the middle, the end face of the threaded sleeve 6 is connected to the connecting rod 7, the end face of the connecting rod 7 is connected to the limit ring 8, the inner ring surface of the limit ring 8 is inserted into the plug rod 10, the end face of the plug rod 10 is connected to the hollow fixing rod 9, the inner side wall of the fixing rod 9 is slidably connected to the limit ring 8, the connecting rod 7 has an inner cavity, the inner cavity of the connecting rod 7 is installed with a damper 11, the piston part of the damper 11 is connected to the plug rod 10, and the plug rod 10 is slidably connected to the inner cavity of the connecting rod 7.

[0028] It should be noted that, in order to improve the transmission smoothness between the fixed rod 9 and the connecting rod 7, such as Figure 5 As shown, the end face of the fixed rod 9 is slidably connected to the connecting rod 7.

[0029] It should be noted that, as Figure 1 As shown, the side of the mounting box 1 closest to the shielding box 2 is slidably connected to the threaded sleeve 6, and the side of the shielding box 2 away from the mounting box 1 has a through hole 17 for the threaded sleeve 6 and the fixing rod 9 to pass through.

[0030] In this embodiment, the miniature DC motor 4 provides power. During the rotation of the output shaft of the miniature DC motor 4, it drives the threaded rod 5 to rotate, causing the threaded sleeve 6 to move away from the miniature DC motor 4 along the threaded path of the threaded rod 5. This causes the threaded sleeve 6 to extend out of the mounting box 1, and then, through the connecting rod 7, push the fixing rod 9 to extend out of the shielding box 2. By controlling the direction of the positive and negative currents connected to the external power supply and the wires of the miniature DC motor 4, the forward and reverse rotation of the miniature DC motor 4 is controlled, thus realizing the extension and retraction of the threaded sleeve 6 and the fixing rod 9.

[0031] When the fixed rod 9 is subjected to an external force, it moves. The connecting rod 7 and the limiting ring 8 move relative to the fixed rod 9 along the inner cavity of the fixed rod 9. The insertion rod 10 then extends into the inner cavity of the connecting rod 7 through the limiting ring 8. This causes the connecting rod 7 to exert a compressive force on the insertion rod 10 and the damper 11, causing the piston portion of the damper 11 to move and engage. This provides a buffering and shock-absorbing effect on the fixed rod 9, reducing the rigid impact on the output shaft of the micro DC motor 4, preventing damage to the components of the push rod motor structure, and extending the service life of the push rod motor structure. Simultaneously, during transmission, the connecting rod 7 drives the limiting ring 8 to move within the inner cavity of the fixed rod 9, and the insertion rod 10, which is fixed to the fixed rod 9, moves along the inner ring surface of the limiting ring 8 within the inner cavity of the connecting rod 7. This improves the relative movement stability between the connecting rod 7 and the fixed rod 9, resulting in high structural stability of the push rod motor components.

[0032] It should be further explained that, in order to improve the smoothness of operation of threaded sleeve 6, such as Figure 2 , Figure 4As shown, the threaded sleeve 6 has two symmetrically arranged movable plates 12 connected to its side. During the movement of the threaded sleeve 6, the two movable plates 12 move synchronously and in the same direction. Limiting rods 14 are symmetrically embedded and slidably connected on the movable plates 12, and the two end faces of the two limiting rods 14 are fixedly connected to the inner wall of the mounting box 1. The movable plates 12 have symmetrically formed limiting holes, and the inner walls of the limiting holes are slidably connected to the limiting rods 14, allowing the limiting rods 14 to determine the positional movement path of the movable plates 12 and enhancing the movement stability of the movable plates 12. Simultaneously, the two limiting rods 14 are arranged in parallel, further improving the structural stability of the components of the push rod motor. Under the constraint of the limiting rods 14, the threaded sleeve 6 is prevented from rotating synchronously with the threaded rod 5, further enhancing the positional movement stability of the threaded sleeve 6.

[0033] It should be further explained that, in order to further improve the smoothness of the operation of the threaded sleeve 6, such as... Figure 2 , Figure 3 As shown, C-shaped movable frames 13 are connected to both ends of the movable plate 12. The inner walls of the two movable frames 13 are centrifugally arranged, and limit plates 15 are slidably connected to the inner walls of the movable frames 13. The centrifugal side of the two limit plates 15 is connected to the corresponding inner wall of the mounting box 1. When the threaded sleeve 6 moves, the movable frame 13 moves along the path of the limit plate 15 under the connection of the movable plate 12. During the transmission process, the movement stability of the threaded sleeve 6 is enhanced, and the structural stability of the components of the push rod motor structure is improved.

[0034] It should be further noted that, in order to facilitate the installation of box 1, such as Figure 1 , Figure 2 As shown, two pairs of mounting ears 16 are connected to the side of the mounting box 1, and the two pairs of mounting ears 16 are symmetrically distributed on both sides of the mounting box 1. The top of the mounting ears 16 has a threaded through hole, and the mounting ears 16 are installed and fixed in the designated position by external set screws, thereby realizing the installation and fixation of the push rod motor structure.

[0035] The micro DC motor 4 used in this utility model is existing technology. Its working principle, size and model are not related to the function of this application, so they will not be described in detail. The control method of this utility model is through a controller. The control circuit of the controller can be implemented by simple programming by those skilled in the art. The power supply is also common knowledge in the art. Furthermore, this utility model is mainly used to protect mechanical devices, so the control method and circuit connection will not be explained in detail.

[0036] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A compact pushrod motor structure, characterized by: The utility model relates to a kind of movable sunshade, which includes: Mounting box, hollow shielding box is connected with the outer side wall of the mounting box; Driving assembly, the driving assembly includes threaded rod and micro direct current motor for providing power, the output shaft of the micro direct current motor is connected with threaded rod by shaft coupling, threaded sleeve is threadedly connected with the threaded rod, the end surface of the threaded sleeve is connected with connecting rod, the end surface of the connecting rod is connected with limit ring, the inner ring surface of the limit ring is inserted with inserting rod, the end surface of the inserting rod is connected with internally hollow fixing rod, the inner side wall of the fixing rod is slidably connected with limit ring, the inner cavity of the connecting rod is mounted with damper, the piston portion of the damper is connected with inserting rod, the inserting rod is slidably connected with the inner cavity of connecting rod.

2. A compact pushrod motor structure according to claim 1, characterized in that: The end surface of the fixing rod is slidably connected with the inner embedding of the connecting rod.

3. A compact push rod motor structure according to claim 1, characterized in that: The side of the mounting box close to the shielding box is slidably connected with the inner embedding of the threaded sleeve, and the side of the shielding box away from the mounting box is provided with through hole for threaded sleeve and fixing rod to pass through.

4. A compact pushrod motor structure according to claim 1, characterized in that: The side of the threaded sleeve is connected with two symmetrically arranged moving plates, the moving plates are symmetrically connected with limit rod by inner embedding sliding, and the two end surfaces of the limit rod are connected with the inner side wall of the mounting box.

5. A compact push rod motor structure according to claim 4, characterized in that: The two ends of the moving plate are respectively connected with C-shaped moving frame, the inner side wall of the moving frame is arranged away from the center, the inner side wall of the moving frame is respectively slidably connected with limit plate, and the side away from the center of the limit plate is respectively connected with the corresponding inner wall of the mounting box.

6. A compact pushrod motor structure according to claim 1, characterized in that: The side of the mounting box is connected with two pairs of mounting ears, and the two pairs of mounting ears are symmetrically distributed on the two sides of the mounting box.

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