A multiple sealed electric push rod

Abstract

The utility model relates to linear transmission technical field, concretely relates to a kind of multiple sealing electric push rod, the electric push rod includes motor, outer tube, waterproof device and the inner tube that can reciprocate linear motion in the outer tube, the waterproof device is sleeved in the end of the outer tube, at least two waterproof rings being spaced apart along the inner tube axial direction are equipped in the waterproof device, the waterproof ring is elastically abutted on the outer circumferential wall of the inner tube.The utility model aims at providing a kind of electric push rod, which can guarantee excellent sealing effect and good waterproof performance even when the inner tube is inclined under stress.

Description

Technical Field

[0001] This utility model relates to the field of linear transmission technology, specifically to a multi-sealed electric push rod. Background Technology

[0002] An electric linear actuator is an electric drive device that converts the rotary motion of a motor into the linear reciprocating motion of a linear actuator. Waterproofing is an essential function of electric linear actuators in many applications, especially in livestock farming, such as large-scale pig farms or chicken farms, where they are widely used to control the opening and closing of ventilation windows, the adjustment of deflectors, and mobile automatic feeding troughs. In these applications, the site requires regular high-pressure water cleaning and chemical disinfection. This necessitates that the electric linear actuator possess excellent waterproof capabilities to prevent damage to internal electrical components such as the motor from water ingress, which could even lead to electrical safety accidents and functional malfunctions. Currently, most electric linear actuators on the market rely on a single waterproof oil seal located between the inner and outer tubes for sealing. However, during actual installation and use, due to deviations in the installation angle or the influence of lateral loads, the force point of the actuator often does not perfectly coincide with the actuator axis, causing the inner tube to tilt during operation. This tilt creates a tiny gap between the inner tube and the waterproof oil seal. Under the flushing of a high-pressure water gun, water can easily penetrate into the actuator through this gap, resulting in insufficient waterproofing. Summary of the Invention

[0003] In order to overcome the shortcomings and deficiencies of the existing technology, the purpose of this utility model is to provide an electric push rod that can ensure excellent sealing effect and good waterproof performance even when the inner tube is tilted under force.

[0004] This utility model is achieved through the following technical solution: A multi-sealed electric actuator includes a waterproof device, an outer tube, an inner tube capable of reciprocating linear motion within the outer tube, and a motor for driving the inner tube. The waterproof device is fitted onto the end of the outer tube, and at least two waterproof rings are provided within the waterproof device and spaced apart along the axial direction of the inner tube. The waterproof rings elastically abut against the outer peripheral wall of the inner tube.

[0005] One end of the waterproof device is fixedly connected to the outer tube, and the other end is through which the inner tube passes.

[0006] The waterproof device also includes an oil seal, and the end of the inner tube is provided with a groove. The oil seal abuts against the outer peripheral wall of the inner tube and is fixedly installed in the groove.

[0007] The waterproof device includes a waterproof cover, which is fixedly connected to the end of the outer tube. The inner wall of the waterproof cover is provided with at least two annular grooves for installing the waterproof ring.

[0008] The waterproof ring is at least one of an O-ring, a rectangular ring, a lip seal, or a V-ring.

[0009] The waterproof device also includes a pressure cap, which is detachably fixed to the waterproof cover and is used to axially pre-tighten or compress the waterproof ring.

[0010] The beneficial effects of this utility model are: This invention relates to a multi-sealed electric linear actuator. By adding an independent waterproof device containing two elastic waterproof rings to the traditional electric linear actuator structure, a double-seal protection is achieved. When the inner tube tilts due to installation issues or uneven stress, the two highly elastic waterproof rings can continuously and tightly adhere to the tilted inner tube surface through their own elastic deformation, effectively filling any gaps that may arise. This design ensures effective prevention of water intrusion even under harsh high-pressure washing conditions, greatly improving the waterproof rating and operational reliability of the electric linear actuator. Furthermore, this ingenious waterproof device requires no complex modifications to the main structure of the electric linear actuator, is easy to install, has low modification costs, and is highly versatile, easily applicable to various specifications of electric linear actuators. Attached Figure Description

[0011] The present invention will be further described with reference to the accompanying drawings, but the embodiments in the drawings do not constitute any limitation on the present invention. For those skilled in the art, other drawings can be obtained based on the following drawings without creative effort.

[0012] Figure 1 This is a three-dimensional structural diagram of the present invention. Figure 2 This is a partially enlarged view of the present invention.

[0013] Figure Labels Motor--100, outer tube--101, inner tube--102, waterproof ring--103, oil seal--104, groove--105, waterproof cover--106. Detailed Implementation

[0014] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0015] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0016] 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 indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0017] like Figure 1 and Figure 2 As shown, this embodiment discloses a multi-sealed electric push rod, which includes a motor 100, an outer tube 101, a waterproof device, and an inner tube 102 that can reciprocate linearly within the outer tube 101. The waterproof device is fitted onto the end of the outer tube 101, and the waterproof device is provided with at least two waterproof rings 103 spaced apart along the axial direction of the inner tube 102. The waterproof rings 103 elastically abut against the outer peripheral wall of the inner tube 102.

[0018] In this embodiment, the waterproof ring 103 is at least one of an O-ring, a rectangular ring, a lip seal, or a V-ring. The inner diameter of the two waterproof rings 103 is smaller than the outer diameter of the inner tube 102 in its natural state. Therefore, when the inner tube 102 passes through the waterproof device, the two waterproof rings 103 will elastically and tightly fit against the outer peripheral wall of the inner tube 102, forming two independent sealing lines.

[0019] Specifically, this embodiment of a multi-sealed electric linear actuator adds an independent waterproof device containing two elastic waterproof rings 103 to the traditional electric linear actuator structure, forming a double-sealed protection. When the inner tube 102 tilts due to installation or uneven stress, the two highly elastic waterproof rings 103 can continuously and tightly adhere to the tilted surface of the inner tube 102 through their own elastic deformation, effectively filling any gaps that may occur. This design ensures that even under harsh high-pressure washing conditions, it can effectively prevent water intrusion, greatly improving the waterproof rating and operational reliability of the electric linear actuator. In addition, the waterproof device is ingeniously designed, requiring no complex modifications to the main structure of the electric linear actuator, making installation convenient, reducing modification costs, and possessing strong versatility, it can be easily applied to various specifications of electric linear actuator products.

[0020] Specifically, the waterproof device includes a waterproof cover 106, which is fixedly connected to the end of the outer tube 101. The inner wall of the waterproof cover 106 is provided with at least two annular grooves for installing the waterproof ring 103. The waterproof device also includes a pressure cap, which is detachably fixed to the waterproof cover 106 for axial pre-tightening or compression of the waterproof ring 103.

[0021] Specifically, one end of the waterproof device is fixedly connected to the outer tube 101, and the other end allows the inner tube 102 to pass through. During operation, when the inner tube 102 extends or retracts, it slides between the two waterproof rings 103. Ideally, the two sealing lines work together to provide double protection. When the inner tube 102 tilts due to installation errors or lateral forces, a single, rigid conventional oil seal 104 will create a gap between itself and the inner tube 102. However, in this invention, the two elastic waterproof rings 103, with their excellent elastic deformation capabilities, can adapt to the tilting state of the inner tube 102 at different positions, always maintaining effective contact and sealing pressure with the tube wall, thereby preventing moisture intrusion.

[0022] Specifically, the waterproof device also includes an oil seal 104. The end of the inner tube 102 is provided with a groove 105. The oil seal 104 abuts against the outer peripheral wall of the inner tube 102 and is fixedly installed in the groove 105, which can further improve the sealing performance of the electric push rod.

[0023] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit the scope of protection of this utility model. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the essence and scope of the technical solutions of this utility model.

Claims

1. A multi-sealed electric actuator, comprising an outer tube, an inner tube capable of reciprocating linear motion within the outer tube, and a motor for driving the inner tube, characterized in that, It also includes a waterproof device, which is fitted onto the end of the outer tube. The waterproof device has at least two waterproof rings spaced apart along the axial direction of the inner tube, and the waterproof rings elastically abut against the outer peripheral wall of the inner tube.

2. The multi-sealed electric actuator according to claim 1, characterized in that, One end of the waterproof device is fixedly connected to the outer tube, and the other end is for the inner tube to pass through.

3. The multi-sealed electric actuator according to claim 1, characterized in that, The waterproof device also includes an oil seal, and the end of the inner tube is provided with a groove. The oil seal abuts against the outer peripheral wall of the inner tube and is fixedly installed in the groove.

4. The multi-sealed electric actuator according to claim 1, characterized in that, The waterproof device includes a waterproof cover, which is fixedly connected to the end of the outer tube. The inner wall of the waterproof cover is provided with at least two annular grooves for installing the waterproof ring.

5. A multi-sealed electric actuator according to claim 1 or 4, characterized in that, The waterproof ring is at least one of the following: O-ring, rectangular ring, lip seal, or V-ring.

6. The multi-sealed electric actuator according to claim 4, characterized in that, The waterproof device also includes a pressure cap, which is detachably fixed to the waterproof cover and used to axially pre-tighten or compress the waterproof ring.

Images