Electric actuator with sealing structure

Abstract

The utility model relates to an electric actuator with a sealing structure, which comprises an electric actuator body and a sealing box sleeved on the outer side of the electric actuator body, one side wall of the sealing box is provided with a round hole, and an output shaft of the electric actuator body is inserted into the round hole and extends to the outside. A sealing assembly is fixedly connected to the position, located at an opening of the round hole, of the outer side wall of the sealing box and arranged on the output shaft in a sleeving mode. The utility model relates to the technical field of electric actuators. According to the electric actuator with the sealing structure, by arranging the sealing assembly, rainwater can be prevented from entering the sealing box through an assembling gap between the sealing box and the electric actuator body, the protection effect of the sealing box on the electric actuator body can be further improved, and the maintenance frequency of the electric actuator body is reduced; the use cost of the electric actuator body is reduced, and the practicability of the electric actuator body is effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of electric actuators, and particularly relates to an electric actuator with a sealing structure. Background Art

[0002] The broadest definition of an actuator is: a driving device that can provide linear or rotational motion, which utilizes a certain driving energy and operates under the action of a certain control signal. The actuator uses liquid, gas, electricity or other energy and converts it into a driving action through a motor, cylinder or other devices.

[0003] In the prior art, since the output shaft of the electric actuator needs to be connected to the driving part and the driven part, the output shaft of the electric actuator needs to extend out of the sealing box, resulting in the sealing effect being affected due to the assembly gap between the output shaft and the sealing box, and rainwater seeps into the sealing box through the assembly gap between the output shaft and the sealing box, affecting the use of the electric actuator. Content of the Utility Model

[0004] Aiming at the deficiencies existing in the prior art, the purpose of the utility model is to provide an electric actuator with a sealing structure to facilitate solving the technical problems mentioned in the above background art.

[0005] The above technical purpose of the utility model is achieved through the following technical solutions:

[0006] An electric actuator with a sealing structure includes an electric actuator body and a sealing box sleeved outside the electric actuator body. One side wall of the sealing box is provided with a round hole, the output shaft of the electric actuator body is inserted into the round hole and extends to the outside, and a sealing component is fixedly connected to the outer side wall of the sealing box at the opening of the round hole, and the sealing component is sleeved on the output shaft.

[0007] Further, the sealing component includes a sealing sleeve and a sealing element. The sealing sleeve is fixedly connected to the sealing box. A through hole for placing the output shaft is formed in the middle of the sealing sleeve. A placement groove is formed by concave inward on the inner side wall of the through hole and is connected with a sealing element, and one side of the sealing element away from the sealing sleeve contacts the output shaft.

[0008] Further, the sealing element is composed of a positioning ring, a pressure sleeve and a sealing ring. A positioning groove is formed in the inner side wall of the placement groove and the positioning ring is placed in the positioning groove. A pressure sleeve is fixedly connected to one side of the positioning ring away from the placement groove, and a sealing ring contacting the output shaft is arranged on one side of the pressure sleeve away from the positioning ring.

[0009] Further, the diameter of the pressure sleeve gradually decreases from right to left along the curvature to be arranged in a bowl shape, so that the cross section of the pressure sleeve forms an arcuate force arm.

[0010] Further, the length of the pressure sleeve is greater than the length of the placement groove, so that the outer side wall of the sealing ring closely adheres to the inner wall of the side of the placement groove away from the positioning groove.

[0011] Further, a circular ring groove that fits with the sealing ring is concavely formed on the outer side wall of the output shaft, and an oil groove for storing lubricating oil is provided on the side wall of the sealing ring located in the circular ring groove.

[0012] In summary, the present utility model includes at least one of the following beneficial technical effects:

[0013] 1. For the electric actuator with a sealing structure, through the provided sealing assembly, rainwater can be prevented from entering the sealing box through the assembly gap between the sealing box and the electric actuator body, which can further improve the protection effect of the sealing box on the electric actuator body, reduce the maintenance frequency of the electric actuator body, lower the use cost of the electric actuator body, and effectively increase the practicability of the electric actuator body;

[0014] 2. For the electric actuator with a sealing structure, through the provided circular ring groove and oil groove, the friction between the output shaft and the sealing member can be reduced when the output shaft rotates, thereby reducing the resistance suffered during the operation of the electric actuator body, reducing the damage to the sealing member during the operation of the electric actuator body, and further reducing the use cost of the electric actuator body. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0016] Figure 1 It is a schematic structural diagram of an electric actuator with a sealing structure of the present utility model.

[0017] Figure 2 It is a schematic internal structure diagram of an electric actuator with a sealing structure of the present utility model.

[0018] Figure 3 It is a schematic structural diagram of the sealing assembly in an electric actuator with a sealing structure of the present utility model.

[0019] Figure 4 It is a schematic structural diagram of the sealing sleeve in an electric actuator with a sealing structure of the present utility model.

[0020] Figure 5This is a schematic structural diagram of a seal in an electric actuator with a sealing structure according to the present utility model.

[0021] In the figure, 1 is the electric actuator body; 2 is the sealing box; 3 is the round hole; 4 is the output shaft; 5 is the sealing assembly; 51 is the sealing sleeve; 52 is the seal; 521 is the positioning ring; 522 is the pressure sleeve; 523 is the sealing ring; 6 is the through hole; 7 is the placement groove; 8 is the positioning groove; 9 is the circular ring groove; 10 is the oil groove. Specific embodiments

[0022] The following further describes the present utility model in detail with reference to the accompanying drawings.

[0023] Embodiment:

[0024] Refer to Figure 1 - Figure 5 An electric actuator with a sealing structure disclosed by the present utility model includes an electric actuator body 1 and a sealing box 2 sleeved outside the electric actuator body 1. One side wall of the sealing box 2 is provided with a round hole 3. The output shaft 4 of the electric actuator body 1 is inserted into the round hole 3 and extends to the outside. A sealing assembly 5 is fixedly connected to the outer side wall of the sealing box 2 at the opening of the round hole 3, and the sealing assembly 5 is sleeved on the output shaft 4.

[0025] In this embodiment, during use, the electric actuator body 1 is placed in the sealing box 2, and then the output shaft 4 of the electric actuator body 1 passes through the round hole 3 of the sealing box 2, so that the electric actuator body 1 can be connected to an external driven member for the normal operation of the electric actuator body 1.

[0026] However, due to the setting of the round hole 3, rainwater may seep into the sealing box 2 through the gap between the round hole 3 and the output shaft 4, causing the electric actuator body 1 to short-circuit due to water ingress, thereby affecting the use of the electric actuator body 1. Therefore, it can be observed Figure 2 that a sealing assembly 5 is provided on the side of the sealing box 2 where the round hole 3 is opened, and the sealing assembly 5 is sleeved on the output shaft 4. The sealing assembly 5 is used to block the rainwater on the outer wall of the output shaft 4, thereby preventing rainwater from seeping into the sealing box 2 through the round hole 3, effectively ensuring the safety of the operating environment of the electric actuator body 1 and making the operation of the electric actuator body 1 more stable.

[0027] In a further preferred embodiment of the present utility model, as Figure 2 and Figure 3As shown in the figure, the sealing assembly 5 includes a sealing sleeve 51 and a seal 52. The sealing sleeve 51 is fixedly connected to the sealing box 2. A through hole 6 for placing the output shaft 4 is formed in the middle of the sealing sleeve 51. A placement groove 7 is concavely formed in the inner side wall of the through hole 6 and is connected with a seal 52. The side of the seal 52 away from the sealing sleeve 51 contacts the output shaft 4.

[0028] In this embodiment, since there is an installation gap between the round hole 3 and the output shaft 4, rainwater will enter the sealing box 2 through the gap, affecting the operation of the electric actuator body 1. Therefore, a sealing sleeve 51 is provided at the opening of the round hole 3. At the same time, a seal 52 is provided in the placement groove 7 formed in the sealing sleeve 51. By contacting the seal 52 with the output shaft 4, the gap between the output shaft 4 and the seal 52 is reduced by the extrusion of the seal 52, so that the rainwater on the outer wall of the output shaft 4 is blocked by the seal 52, thereby preventing rainwater from entering the sealing box 2 and achieving the effect of protecting the electric actuator body 1.

[0029] In a further preferred embodiment of the present utility model, as Figure 3 - Figure 5 shown in the figure, the seal 52 is composed of a positioning ring 521, a pressure sleeve 522 and a sealing ring 523. A positioning groove 8 is formed in the inner side wall of the placement groove 7 and the positioning ring 521 is placed therein. The pressure sleeve 522 is fixedly connected to the side of the positioning ring 521 away from the placement groove 7. The sealing ring 523 in contact with the output shaft 4 is provided on the side of the pressure sleeve 522 away from the positioning ring 521.

[0030] In this embodiment, by cooperating the provided positioning ring 521 with the positioning groove 8 formed in the placement groove 7, the seal 52 can be fixed, making the seal 52 more stable when installed in the placement groove 7, thereby making the installation of the sealing assembly 5 simpler and easier and improving the production efficiency of the electric actuator body 1.

[0031] And observing Figure 4 it can be found that by providing a pressure sleeve 522 on one side of the positioning ring 521 and connecting a sealing ring 523 to the side of the pressure sleeve 522 away from the positioning ring 521, the pressure applied by the pressure sleeve 522 to the sealing ring 523 and the self-elastic force of the sealing ring 523 when it is squeezed and expanded can be used to closely adhere to the output shaft 4, effectively ensuring the contact tightness between the sealing ring 523 and the output shaft 4, thereby preventing rainwater from passing through the sealing ring 523 and entering the sealing box 2, and effectively ensuring the protection effect on the electric actuator body 1.

[0032] In a further preferred embodiment of the present utility model, as Figure 3 and Figure 4As shown, the diameter of the pressure sleeve 522 gradually decreases from right to left along the curvature, and is arranged in a bowl shape, so that the cross-section of the pressure sleeve 522 forms an arcuate force arm.

[0033] In this embodiment, by arranging the pressure sleeve 522 in a bowl shape and making the cross-section of the pressure sleeve 522 form an arcuate force arm, when the sealing ring 523 expands under the extrusion of the output shaft 4, the pressure sleeve 522 can be bent under the extrusion of the sealing ring 523, and the pressure sleeve 522 can provide a greater pressure on the sealing ring 523 through the bent force arm, so that the sealing ring 523 can be further close to the output shaft 4 to improve the sealing effect of the sealing ring 523.

[0034] In a further preferred embodiment of the present utility model, as Figure 3 shown, the length of the pressure sleeve 522 is greater than the length of the placement groove 7, so that the outer side wall of the sealing ring 523 closely adheres to the inner wall of the placement groove 7 on the side away from the positioning groove 8.

[0035] In this embodiment, by making the length of the pressure sleeve 522 greater than the length of the placement groove 7, when the seal 52 is installed in the placement groove 7, the sealing ring 523 can always be kept in contact with the inner wall of the placement groove 7 under the extrusion of the pressure sleeve 522, so as to prevent rainwater from entering the placement groove 7 along the sealing ring 523 and avoid rainwater bypassing the seal 52 and entering the seal box 2, which can further improve the protection of the electric actuator body 1.

[0036] In a further preferred embodiment of the present utility model, as Figure 3 shown, an annular groove 9 that fits the sealing ring 523 is formed by concave inward on the outer side wall of the output shaft 4, and an oil groove 10 for storing lubricating oil is provided on the side wall of the sealing ring 523 located in the annular groove 9.

[0037] In this embodiment, by providing the annular groove 9 on the outer wall of the output shaft 4 and simultaneously providing the oil groove 10 on the sealing ring 523, the lubricating oil in the oil groove 10 can be locked by the pressure between the sealing ring 523 and the annular groove 9, so that the lubricating oil provides a lubricating effect between the sealing ring 523 and the output shaft 4 while avoiding the leakage of the lubricating oil, which can reduce the resistance when the electric actuator body 1 drives the output shaft 4 to rotate, reduce the damage generated when the sealing ring 523 rotates in contact with the output shaft 4, and further improve the practicability of the electric actuator body 1.

[0038] The embodiments of this specific implementation manner are all preferred embodiments of the present utility model, and do not limit the protection scope of the present utility model accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of the present utility model should be covered within the protection scope of the present utility model.

Claims

1. An electric actuator with a sealing structure, comprising an electric actuator body (1) and a sealing box (2) sleeved outside the electric actuator body (1), characterized in that, One side wall of the sealed box (2) is provided with a round hole (3), an output shaft (4) of the electric actuator body (1) is inserted into the round hole (3) and extends to the outside, and a sealing assembly (5) is fixedly connected to the outer side wall of the sealed box (2) at the opening of the round hole (3), and the sealing assembly (5) is sleeved on the output shaft (4); The sealing assembly (5) includes a sealing sleeve (51) and a sealing member (52), the sealing sleeve (51) is fixedly connected to the sealed box (2), a through hole (6) for placing the output shaft (4) is formed in the middle of the sealing sleeve (51), a placement groove (7) is formed by concave inward on the inner side wall of the through hole (6) and is connected with a sealing member (52), and one side of the sealing member (52) away from the sealing sleeve (51) is in contact with the output shaft (4); The sealing member (52) is composed of a positioning ring (521), a pressure sleeve (522) and a sealing ring (523), a positioning groove (8) is formed in the inner side wall of the placement groove (7) and the positioning ring (521) is placed therein, a pressure sleeve (522) is fixedly connected to one side of the positioning ring (521) away from the placement groove (7), and a sealing ring (523) in contact with the output shaft (4) is arranged on one side of the pressure sleeve (522) away from the positioning ring (521).

2. The electric actuator with a sealing structure according to claim 1, wherein The diameter of the pressure sleeve (522) gradually decreases from right to left along the curvature to be arranged in a bowl shape, so that the cross section of the pressure sleeve (522) forms an arcuate force arm.

3. An electric actuator with a sealing structure according to claim 1, characterized in that, The length of the pressure sleeve (522) is greater than the length of the placement groove (7), so that the outer side wall of the sealing ring (523) is closely attached to the inner wall of one side of the placement groove (7) away from the positioning groove (8).

4. An electric actuator with a sealing structure according to claim 1, characterized in that, A circular ring groove (9) that fits with the sealing ring (523) is formed by concave inward on the outer side wall of the output shaft (4), and an oil groove (10) for storing lubricating oil is formed in the side wall of the sealing ring (523) located in the circular ring groove (9).

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