High-strength miniature electric push rod

Abstract

The utility model provides a high-strength miniature electric push rod, and relates to the technical field of electric push rods. Comprising a shell and a base connected to the rear end of the shell, a driving motor and a telescopic assembly connected with the driving motor are arranged in the shell, and a mounting base suitable for mounting the driving motor and an anti-rotation sleeve suitable for limiting rotation of a telescopic rod of the telescopic assembly are arranged in the shell; wherein one end of the mounting seat is connected with the base through a connecting device; and the other end of the mounting seat is connected with the anti-rotation sleeve, so that the anti-rotation sleeve is fixed in the shell. According to the scheme, the working anti-pressure capability and the anti-tension capability of the electric push rod can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of electric push rods, in particular to a high-strength micro electric push rod. Background Art

[0002] An electric linear actuator is an electric drive device that converts the rotational motion of a motor into the linear reciprocating motion of a linear actuator. However, many electric linear actuators are currently large in size and cannot adapt to installation requirements in small spaces, which results in many product designs and R&D directions being unable to be realized. Current electric linear actuators generally use a plastic nut structure, which has low motion accuracy, a plastic shell, poor heat dissipation for the motor, and unstable clearance. In addition, for a cylindrical electric linear actuator, the integrated outer tube ensures structural strength, and it is difficult to simultaneously implement an internal anti-rotation and limit structure. Utility Model Content

[0003] The utility model discloses a high-strength micro electric push rod, aiming to improve the problems of high difficulty in internal anti-rotation and position limiting and low impact resistance of the existing circular tubular electric push rod.

[0004] The utility model adopts the following scheme:

[0005] The present application provides a high-strength micro electric push rod, comprising a shell and a base connected to the rear end of the shell, wherein a drive motor and a telescopic assembly connected to the drive motor are arranged in the shell, and a mounting seat suitable for mounting the drive motor and an anti-rotation sleeve suitable for limiting the rotation of the telescopic rod of the telescopic assembly are arranged in the shell; wherein one end of the mounting seat is connected to the base via a connecting device; and the other end of the mounting seat is connected to the anti-rotation sleeve so that the anti-rotation sleeve is fixed in the shell.

[0006] Furthermore, two first connecting ears are relatively arranged at one end of the base, and two opposite first connecting grooves are respectively formed on both side edges of the two first connecting ears. Two second connecting ears are relatively arranged on the mounting seat, and two opposite second connecting grooves are respectively formed on both side edges of the two second connecting ears, wherein the first connecting ears are suitable for being inserted into the second connecting grooves, and the second connecting ears are suitable for being inserted into the first connecting grooves to form an interlaced connection.

[0007] Furthermore, a first card slot and a second card slot are respectively formed on the outer sides of the first connecting ear and the second connecting ear for installing the connecting device, and the base and the mounting seat are fixed by the connecting device.

[0008] Furthermore, the connecting device is a connecting clamp.

[0009] Furthermore, a snap-in ear is provided at one end of the mounting seat connected to the anti-rotation sleeve, and a snap-in surface connected to the snap-in ear is provided on the anti-rotation sleeve so as to securely connect the mounting seat to the anti-rotation sleeve.

[0010] Furthermore, a bottom buffer pad is provided in the mounting seat to receive the telescopic rod of the telescopic assembly.

[0011] Furthermore, a top buffer device is provided at one end of the shell away from the driving motor to limit the maximum telescopic amount of the telescopic rod.

[0012] Furthermore, the top buffer device includes a metal gasket and a buffer ring, the end of the shell includes a guide sleeve, the buffer ring is arranged between the metal gasket and the guide sleeve, and the metal gasket is arranged at the end of the anti-rotation sleeve.

[0013] Furthermore, the drive motor is connected to a current detection module to detect current changes generated when the drive motor is stalled, and control the circuit of the drive motor to be cut off or the drive motor to be reversed when it is detected that the current exceeds a preset cut-off current.

[0014] Furthermore, the driving motor is connected to a wireless receiving module so as to be suitable for wirelessly controlling the working state of the driving motor.

[0015] Beneficial effects:

[0016] The utility model provides an internal staggered buckle-type connection clamp connection, so that the structure can withstand greater tension and pressure. The combination of the buffer device at the upper limit position and the lower limit position of the telescopic rod of the telescopic assembly significantly improves the anti-buffering ability of the telescopic rod and the service life of the buffer device, while also improving the service life of the push rod; further, by providing a current detection module, when the current exceeds the preset cut-off current value, the drive motor is automatically protected to avoid heating and burning the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic structural diagram of a high-strength micro electric push rod according to an embodiment of the utility model;

[0018] Figure 2 This is a schematic diagram of the exploded structure of a high-strength micro electric push rod according to an embodiment of the utility model;

[0019] Figure 3 This is a schematic cross-sectional structure diagram of a high-strength micro electric push rod according to an embodiment of the utility model;

[0020] Figure 4 This is a schematic diagram of the internal structure of a high-strength micro electric push rod after removing the shell in an embodiment of the utility model;

[0021] Figure 5 This is a structural schematic diagram of a base of a high-strength micro electric push rod according to an embodiment of the utility model;

[0022] Figure 6 This is a structural schematic diagram of a mounting base for a high-strength micro electric push rod according to an embodiment of the utility model;

[0023] Icons: shell 1, base 2, first connecting ear 201, first connecting slot 202, drive motor 3, telescopic rod 4, transmission screw 5, mounting seat 6, second connecting ear 601, second connecting slot 602, first clamping slot 603, second clamping slot 604, snap-on ear 605, connecting clamp 7, anti-rotation sleeve 8, guide sleeve 9, sealing ring 10, front ear 11, bottom buffer pad 12, metal gasket 13, buffer ring 14, current detection module 15, screw nut 16. DETAILED DESCRIPTION

[0024] Combination Figures 1 to 6 As shown, this embodiment provides a high-strength micro electric push rod, including a shell 1 and a base 2 connected to the rear end of the shell 1, a driving motor 3 and a telescopic assembly connected to the driving motor 3 are arranged in the shell 1, and a mounting seat 6 suitable for installing the driving motor 3 and an anti-rotation sleeve 8 suitable for limiting the rotation of the telescopic rod 4 of the telescopic assembly are arranged in the shell 1; wherein one end of the mounting seat 6 is connected to the base 2 through a connecting device; the other end of the mounting seat 6 is connected to the anti-rotation sleeve 8 to fix the anti-rotation sleeve 8 in the shell 1.

[0025] Combination Figures 2 to 4 As shown, in this embodiment, the telescopic assembly includes a telescopic rod 4 and a transmission screw 5, the transmission screw 5 is connected to the drive motor 3 by transmission, and the transmission screw 5 is driven to rotate when the drive motor 3 rotates. A screw nut 16 is arranged between the transmission screw 5 and the telescopic rod 4, and the screw nut 16 is connected to the telescopic rod. The screw nut 16 is suitable for moving up and down along the transmission screw 5 to drive the telescopic rod 4 to move along the transmission screw 5 to achieve the telescopic effect. The drive motor 3 can be a stepper motor. A guide sleeve 9 is arranged at the end of the housing 1 to guide the telescopic rod 4, and a sealing ring 10 is arranged between the guide sleeve 9 and the telescopic rod 4 to improve the sealing and waterproof effect. Further, a front ear 11 is also arranged at the end of the telescopic rod 4 for connecting the driven part. In one embodiment, an anti-rotation block is arranged at the bottom end of the telescopic rod 4, and the diameter of the anti-rotation block is larger than the rod body of the telescopic rod 4. A limited rotation surface can be arranged on the anti-rotation block to cooperate with the anti-rotation sleeve 8 to prevent the telescopic rod 4 from rotating during the telescopic process.

[0026] The housing 1 is provided with an anti-rotation sleeve 8, which can be fixed in the housing 1 by an adhesive, and the anti-rotation sleeve 8 is provided with an anti-rotation surface for cooperating with the rotation-limiting surface of the telescopic rod 4. The end of the anti-rotation sleeve 8 connected to the mounting seat 6 is provided with a clamping surface, which can be provided on the outside of the anti-rotation sleeve 8, and two clamping surfaces can be provided opposite to each other for docking with the mounting seat 6.

[0027] Combination Figures 2 to 6 As shown, two first connecting ears 201 are relatively arranged at one end of the base 2, and two first connecting grooves 202 are formed on both sides of the two first connecting ears 201, and two second connecting ears 601 are relatively arranged on the mounting seat 6, and two second connecting ears 601 are formed on both sides of the two second connecting ears 601, wherein the first connecting ear 201 is suitable for inserting into the second connecting groove, and the second connecting ear 601 is suitable for inserting into the first connecting groove to form a staggered connection. Here, the first connecting ear 201 and the second connecting ear 601 are respectively formed with a first card slot 603 and a second card slot 604 on the outside for installing the connecting device, and the base 2 and the mounting seat 6 are fixed by the connecting device, and the connecting device can be a connecting clamp 7. In this embodiment, two first card slots 603 and second card slots 604 can be respectively provided, so as to improve the connection strength by connecting each connecting clamp 7 in the coming year. The first clamping groove 603 and the second clamping groove 604 can be located at the same height position after the first connecting ear 201 is completely inserted into the second connecting groove. The first clamping groove 603 and the second clamping groove 604 can form a circle-like shape for inserting the connecting clamp 7. The mounting seat 6 is connected to the connecting seat by staggered clamping and fixed by the connecting clamp 7. On the one hand, it is convenient to disassemble and install, and on the other hand, the structure can withstand greater tension and pressure. It should be noted that in other embodiments, other connection structures can also be used for connection.

[0028] The mounting seat 6 is used to install the driving motor 3, and a through hole is provided inside the mounting seat 6 for the rotating shaft of the driving motor 3 to extend out. The end of the mounting seat 6 connected to the anti-rotation sleeve 8 is provided with a snap-in ear 605 for snapping with the snap-in surface on the anti-rotation sleeve 8, so that the mounting seat 6 and the anti-rotation sleeve 8 are snap-connected. After the connection, the mounting seat 6 and the anti-rotation sleeve 8 including the base 2 can be connected into a whole, which improves the anti-rotation ability of the anti-rotation sleeve 8 and makes the entire device have better tensile and compressive resistance.

[0029] Combination Figures 2 to 3As shown, in one embodiment, a bottom buffer pad 12 is provided in the mounting seat 6 to receive the telescopic rod 4 of the telescopic assembly. A top buffer device is provided at one end of the housing 1 away from the drive motor 3 to limit the maximum telescopic amount of the telescopic rod 4. Here, the bottom buffer pad 12 can receive the bottom of the anti-rotation block of the telescopic rod 4, and at the same time, the top buffer device can support the top surface of the anti-rotation block when the telescopic rod 4 moves to the top limit position, thereby improving the service life of the push rod. In this embodiment, the top buffer device includes a metal gasket 13 and a buffer ring 14, and the buffer ring 14 is arranged between the metal gasket 13 and the guide sleeve 9, and the metal gasket 13 is arranged at the end of the anti-rotation sleeve 8. The buffer ring 14 adopts an O-shaped rubber ring, and the combination of the buffer structure of the metal gasket 13 and the buffer ring 14 significantly improves the service life of the buffer.

[0030] In another embodiment, the drive motor 3 is connected to a current detection module 15 to detect the current change generated by the drive motor 3 when it is stalled, and control to cut off the circuit of the drive motor 3 or control the drive motor 3 to reverse when the current exceeds the preset cut-off current. Here, the current detection module 15 can be a PCBA current control board, which mainly connects, conducts, judges and processes the current between the power supply and the drive motor 3. When the telescopic rod 4 of the electric push rod is pushed to the end or received at the bottom, the motor is stalled, causing the current to rise. When the current detection module 15 detects that the current reaches the preset cut-off current, the current of the circuit is cut off, or the power supply can be controlled to be reversed, and the drive motor 3 can be controlled to reverse and work again. This solution can improve the safety performance of the motor during operation.

[0031] In another embodiment, the drive motor 3 is connected to a wireless receiving module to wirelessly control the working state of the drive motor 3. The wireless receiving module can be a Bluetooth module, a Wi-Fi module, etc., to remotely control the forward rotation, reverse rotation or shutdown of the drive motor 3.

[0032] The low power consumption design of the present invention enables the micro electric push rod to use a 12V power supply, meeting the working conditions of various low voltage power supply environments, and the telescopic rod 4 moves axially during operation of the push rod, making the operation more stable.

[0033] It should be understood that the above are only preferred implementations of the present utility model, and the protection scope of the present utility model is not limited to the above embodiments. All technical solutions under the concept of the present utility model belong to the protection scope of the present utility model.

[0034] The above description of the drawings used in the implementation manner only shows certain embodiments of the utility model and should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

Claims

1. A high-strength micro electric push rod, comprising a housing and a base connected to the rear end of the housing, wherein a drive motor and a telescopic assembly connected to the drive motor are arranged in the housing, characterized in that: The shell is provided with a mounting seat suitable for mounting the driving motor and an anti-rotation sleeve suitable for limiting the rotation of the telescopic rod of the telescopic assembly; wherein one end of the mounting seat is connected to the base via a connecting device; and the other end of the mounting seat is connected to the anti-rotation sleeve so that the anti-rotation sleeve is fixed in the shell.

2. The high-strength micro electric linear actuator according to claim 1, characterized in that: Two first connecting ears are relatively arranged at one end of the base, and two opposite first connecting grooves are formed on both side edges of the two first connecting ears. Two second connecting ears are relatively arranged on the mounting seat, and two opposite second connecting grooves are formed on both side edges of the two second connecting ears, wherein the first connecting ears are suitable for being inserted into the second connecting grooves, and the second connecting ears are suitable for being inserted into the first connecting grooves to form a staggered connection.

3. The high-strength micro electric linear actuator according to claim 2, characterized in that: The outer sides of the first connecting ear and the second connecting ear are respectively formed with a first clamping groove and a second clamping groove for installing the connecting device, and the base and the mounting seat are fixed by the connecting device.

4. The high-strength micro electric linear actuator according to claim 3, characterized in that: The connecting device is a connecting clamp.

5. The high-strength micro electric linear actuator according to claim 1, characterized in that: A clamping ear is arranged at one end of the mounting seat connected to the anti-rotation sleeve, and a clamping surface connected to the clamping ear is arranged on the anti-rotation sleeve to enable the mounting seat to be clamped and connected to the anti-rotation sleeve.

6. The high-strength micro electric linear actuator according to claim 1, characterized in that: A bottom buffer pad is arranged in the mounting seat to receive the telescopic rod of the telescopic assembly.

7. The high-strength micro electric linear actuator according to claim 1, characterized in that: A top buffer device is arranged at one end of the housing away from the driving motor to limit the maximum telescopic amount of the telescopic rod.

8. The high-strength micro electric linear actuator according to claim 7, characterized in that: The top buffer device includes a metal gasket and a buffer ring, the end of the shell includes a guide sleeve, the buffer ring is arranged between the metal gasket and the guide sleeve, and the metal gasket is arranged at the end of the anti-rotation sleeve.

9. The high-strength micro electric linear actuator according to claim 1, characterized in that: The drive motor is connected to a current detection module to detect the current change generated when the drive motor is stalled, and control the circuit of the drive motor to be cut off or the drive motor to be reversed when it is detected that the current exceeds a preset cut-off current.

10. The high-strength micro electric linear actuator according to claim 1, characterized in that: The driving motor is connected to a wireless receiving module so as to be suitable for wirelessly controlling the working state of the driving motor.

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