Electric push rod sealing structure

Abstract

The utility model discloses an electric push rod sealing structure, which belongs to the technical field of electric push rod sealing and comprises a fixed part and a telescopic part slidably arranged in the fixed part, and further comprises a sleeve fixedly arranged on the top surface of the inner wall of the fixed part, an oil cavity is formed in the sleeve, and the telescopic part penetrates through the inside of the oil cavity. Sealing and lubrication are formed when the telescopic part passes through; the sealing assembly is arranged in the sleeve and used for forming sealing between the fixed part and the telescopic part when the telescopic part stretches out and draws back, the sealing assembly comprises two sealing rings movably arranged in the sleeve, the telescopic part penetrates through the two sealing rings, and the sealing rings are located at the upper end and the lower end of the oil liquid cavity; and the fastening assembly is arranged outside the sealing ring and used for extruding, fastening and sealing the sealing ring when the sealing assembly is pushed to move, and the sealing effect of the equipment is effectively improved.

Description

Technical Field

[0001] This utility model belongs to the field of electric push rod sealing technology, and in particular relates to an electric push rod sealing structure. Background Technology

[0002] An electric linear actuator is an electrically driven device that converts electrical energy into linear reciprocating motion energy. Traditional electric linear actuators consist of a fixed part and a telescopic part. During telescopic extension and retraction, gaps easily form between the telescopic part and the fixed part. Due to environmental factors, when the air is humid or the operating environment is damp, moisture can easily enter the fixed part through these gaps, damaging the components inside. To prevent these gaps, they are sealed. The traditional sealing method involves placing a sealing ring between the telescopic part and the fixed part. Although a sealing ring can seal the gap, repeated extension and retraction during use can cause friction between the telescopic part and the sealing ring, leading to air leakage over time. This results in a deterioration of the seal between the telescopic part and the fixed part. Utility Model Content

[0003] To address the problems existing in the prior art, this utility model provides an electric push rod sealing structure, which solves the problem that prolonged use of the equipment can lead to wear of the sealing ring and a decrease in sealing performance.

[0004] This utility model is implemented as follows: an electric push rod sealing structure includes a fixed part, a telescopic part slidably disposed within the fixed part, and further includes:

[0005] A sleeve is fixedly installed on the top surface of the inner wall of the fixing part. An oil cavity is opened inside the sleeve. The telescopic part passes through the inside of the oil cavity, and the telescopic part forms a seal and lubrication when it passes through.

[0006] A sealing assembly, disposed within the sleeve, is used to form a seal between the fixed part and the telescopic part when the telescopic part extends or retracts. It includes two sealing rings movably disposed within the sleeve and several extrusion rings disposed outside the sealing rings. The telescopic part passes through the two sealing rings, and the sealing rings are located at the upper and lower ends of the oil cavity.

[0007] A fastening assembly, located outside the sealing ring, is used to form a compression and fastening seal on the sealing ring by pushing the compression ring to move.

[0008] In a preferred embodiment of this invention, the oil cavity is filled with lubricating oil and sealed by sealing rings at both ends.

[0009] As a preferred embodiment of this invention, several semi-annular extrusion rings are movably arranged at equal angles inside the sleeve. The extrusion rings are located outside the sealing ring, and when the extrusion rings extrude the sealing ring, they improve the seal between the sealing ring and the telescopic part.

[0010] As a preferred embodiment of this utility model, the outer side of the compression ring is further provided with a spring member for its reset, and the spring member and the compression ring are connected by an L-shaped fixing bracket.

[0011] As a preferred embodiment of this utility model, the fastening assembly includes a push plate mounted on the compression ring, the end of which is arc-shaped; two rotating rings rotatably disposed on the fixed part, a damping element for fixing the rotating rings and the fixed part is provided between the rotating rings and the fixed part, and a plurality of wedge plates are evenly distributed on the inner side of the rotating rings, the wedge plates and the push plate being in movable contact.

[0012] As a preferred embodiment of this utility model, an airtight detector is also provided on the inner side of the fixing part. The airtight detector is located on the side of the sealing ring and is used to detect the sealing performance between the sealing ring and the telescopic part.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0014] This invention utilizes an oil chamber within the sleeve and sealing rings at both ends of the oil chamber to create an oil seal during equipment operation. When gas enters the fixed part through the sealing rings, the oil in the oil chamber effectively blocks the gas or liquid, significantly improving the equipment's sealing performance. Simultaneously, when the telescopic part passes through the oil chamber, the oil in the chamber lubricates the surface of the telescopic part, preventing excessive friction between the telescopic part and the sealing ring due to a rough surface, which could damage the sealing ring. Furthermore, when the sealing ring wears down, the compression ring pushes it closer to the telescopic part, further extending its service life. This simple double-layer seal of the oil chamber and sealing rings greatly improves the equipment's sealing effect, and its simple structure makes it highly practical. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the front view structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the cross-sectional structure from a partial front view of this utility model. Figure 1 ;

[0017] Figure 3 This is a schematic diagram of the cross-sectional structure from a partial front view of this utility model. Figure 2 ;

[0018] Figure 4 This is a schematic diagram of the internal structure of this utility model from a partial upper view. Figure 1 ;

[0019] Figure 5 This is a schematic diagram of the internal structure of the present invention from a partial frontal view.

[0020] Figure 6 This is a schematic diagram of the upper internal structure of a portion of the present invention. Figure 2 .

[0021] In the picture:

[0022] 1. Fixed part; 2. Telescopic part; 3. Sleeve; 4. Oil chamber; 5. Sealing ring; 6. Extrusion ring; 7. Fixing frame; 8. Spring component; 9. Push plate; 10. Rotating ring; 11. Wedge plate. Detailed Implementation

[0023] To further understand the utility model content, features and effects of this utility model, the following embodiments are provided, and detailed descriptions are given in conjunction with the accompanying drawings.

[0024] The structure of this utility model will now be described in detail with reference to the accompanying drawings.

[0025] like Figures 1 to 6 As shown, the electric push rod sealing structure provided in this embodiment of the present invention includes a fixed part 1, a telescopic part 2 slidably disposed within the fixed part 1, and further includes:

[0026] A sleeve 3 is fixedly installed on the top surface of the inner wall of the fixing part 1. An oil cavity 4 is opened inside the sleeve 3. The telescopic part 2 passes through the inside of the oil cavity 4, and the telescopic part 2 forms a seal and lubrication when it passes through.

[0027] A sealing assembly is provided inside the sleeve 3 to form a seal between the fixed part 1 and the telescopic part 2 when the telescopic part 2 extends or retracts. It includes two sealing rings 5 ​​movably provided inside the sleeve 3 and a plurality of compression rings 6 provided outside the sealing rings 5. The telescopic part 2 passes through the two sealing rings 5, and the sealing rings 5 ​​are located at the upper and lower ends of the oil chamber 4.

[0028] A fastening assembly, disposed outside the sealing ring 5, is used to form a compression fastening seal on the sealing ring 5 when the compression ring 6 is pushed to move.

[0029] As a preferred embodiment of this utility model, the oil cavity 4 is filled with lubricating oil and sealed by the sealing rings 5 ​​at both ends. The lubricating oil fills the oil cavity 4, making the oil cavity 4 sealed. When the telescopic part 2 passes through the oil cavity 4, it can form lubrication on the surface of the telescopic part 2 and seal the position where the telescopic part 2 enters the fixed part 1.

[0030] As a preferred embodiment of this utility model, a plurality of semi-annular compression rings 6 are movably arranged at equal angles inside the sleeve 3. The compression rings 6 are located outside the sealing ring 5, and when the compression rings 6 compress the sealing ring 5, they improve the seal between the sealing ring 5 and the telescopic part 2. When the sealing ring 5 is worn, the compression of the compression rings 6 achieves the fit between the sealing ring 5 and the telescopic part 2, further improving its sealing performance.

[0031] As a preferred embodiment of this utility model, the outer side of the compression ring 6 is also provided with a spring member 8 for its reset. The spring member 8 and the compression ring 6 are connected by an L-shaped fixing bracket 7. When the sealing ring 5 is compressed by the telescopic part 2, the elastic force of the spring member 8 acts on the compression ring 6. At the same time, the compression force of the spring member 8 improves the sealing performance between the sealing ring 5 and the telescopic part 2.

[0032] As a preferred embodiment of this utility model, the fastening assembly includes a push plate 9 mounted on the compression ring 6, the end of the push plate 9 being arc-shaped; two rotating rings 10 rotatably disposed on the fixing part 1, a damping element for fixing the rotating ring 10 and the fixing part 1 being provided between the rotating ring 10 and the fixing part 1; a plurality of wedge plates 11 are evenly distributed on the inner side of the rotating ring 10, the wedge plates 11 and the push plate 9 are in active contact; when the compression ring 6 is squeezed by the push plate 9 through the wedge plates 11, the compression ring 6 forms a squeezing force on the sealing ring 5, ensuring the sealing effect of the sealing ring 5; when the wedge plates 11 and the compression ring 6 move away from each other, the compression ring 6 resets, which also facilitates the replacement of the sealing ring 5.

[0033] As a preferred embodiment of this utility model, an airtight detector is also provided on the inner side of the fixing part 1. The airtight detector is located on the side of the sealing ring 5 and is used to detect the sealing performance between the sealing ring 5 and the telescopic part 2. By detecting the sealing performance between the sealing ring 5 and the telescopic part 2, the rotation of the rotating ring 10 is adjusted to ensure the fit between the sealing ring 5 and the telescopic part 2, thereby further improving the sealing between the telescopic part 2 and the fixing part 1.

[0034] The working principle of this utility model:

[0035] refer to Figure 2 The telescopic part 2 extends through the oil cavity 4 to the outside of the fixed part 1, as shown. Figure 3 The upper and lower sides of the oil cavity 4 are sealed by two sealing rings 5, and the oil cavity 4 is filled with lubricating oil. When the telescopic part 2 extends or retracts, the two sealing rings 5 ​​can fully seal the telescopic part 2 and the fixed part 1, and the filled oil provides a secondary seal, preventing gas and humid air from entering the fixed part 1.

[0036] refer to Figure 4After prolonged use, the sealing ring 5 wears down, creating a gap between it and the telescopic part 2. This is detected by the airtightness detector, triggering an alarm. The rotating ring 10 is then rotated. As the rotating ring 10 rotates forward, the wedge plate 11 moves simultaneously. During this movement, the wedge plate 11 presses against the push plate 9, causing multiple compression rings 6 to move closer together. When the compression rings 6 approach each other, the outer surface of the sealing ring 5 is compressed, causing its inner wall to adhere to the surface of the telescopic part 2, further enhancing its sealing performance. When the sealing ring 5 needs replacement, the rotating ring 10 is rotated in the reverse direction. At this time, the spring 8 returns to its original position and can be pulled... Figure 5 The several compression rings 6 in the middle are moved away from each other, thereby resetting them. At this time, the sealing ring 5 can be replaced.

[0037] This invention utilizes an oil chamber 4 within the sleeve 3 and sealing rings 5 ​​at both ends of the oil chamber 4 to create an oil seal during equipment sealing. When gas enters the fixed part 1 through the sealing rings 5, the oil in the oil chamber 4 effectively blocks the gas or liquid, significantly improving the equipment's sealing performance. Simultaneously, when the telescopic part 2 passes through the oil chamber 4, the oil in the oil chamber 4 provides ample lubrication to the surface of the telescopic part 2, preventing excessive roughness that could lead to excessive friction between the telescopic part 2 and the sealing ring 5, thus avoiding damage to the sealing ring 5. Furthermore, when the sealing ring 5 wears down, the compression ring 6 can bring it closer to the telescopic part 2, further extending its service life. The equipment, through this simple double-layer seal of the oil chamber 4 and sealing rings 5, significantly improves its sealing effect, and its simple structure makes it highly practical.

[0038] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0039] 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. An electric push rod sealing structure comprising a fixed part (1) and a telescopic part (2) slidingly arranged in the fixed part (1), characterized in that: Also include: The sleeve (3) is fixedly arranged on the top surface of the inner wall of the fixed part (1), the inside of the sleeve (3) is provided with an oil cavity (4), the telescopic part (2) passes through the inside of the oil cavity (4), and the telescopic part (2) forms sealing and lubrication when passing through; The sealing assembly is arranged in the sleeve (3) and is used for forming sealing between the fixed part (1) and the telescopic part (2) when the telescopic part (2) is telescoped, and the sealing assembly comprises two sealing rings (5) movably arranged in the sleeve (3) and a plurality of extrusion rings (6) arranged outside the sealing rings (5), the telescopic part (2) passes through the two sealing rings (5), and the sealing rings (5) are located at the upper and lower ends of the oil cavity (4); The fastening assembly is arranged outside the sealing ring (5) and is used for extruding and fastening the sealing ring (5) when the extrusion ring (6) is pushed to move.

2. An electric push rod seal structure as claimed in claim 1, characterized in that: The oil cavity (4) is filled with lubricating oil, and the two end sealing rings (5) form sealing.

3. An electric push rod seal structure as claimed in claim 2, characterized in that: A plurality of semi-annular extrusion rings (6) are arranged at equal angles in the sleeve (3), the extrusion rings (6) are located outside the sealing rings (5), and the extrusion of the extrusion ring (6) improves the sealing between the sealing ring (5) and the telescopic part (2).

4. An electric push rod seal structure as claimed in claim 3, characterized in that: The extrusion ring (6) is further provided with a spring member (8) for resetting, and the spring member (8) and the extrusion ring (6) are connected through an L-shaped fixing frame (7).

5. An electric push rod seal structure as claimed in claim 4, characterized in that: The fastening assembly comprises a push plate (9) mounted on the extrusion ring (6), the end of the push plate (9) is arc-shaped, two rotating rings (10) are rotatably arranged on the fixed part (1), a damping member is arranged between the rotating ring (10) and the fixed part (1) for fixing, a plurality of wedge-shaped plates (11) are arranged at equal angles on the inside of the rotating ring (10), and the wedge-shaped plates (11) and the push plate (9) are movably contacted.

6. An electric push rod seal structure as claimed in claim 5, characterized in that: The fixed part (1) is further provided with an air tightness detector, the air tightness detector is located at the side of the sealing ring (5), and is used for detecting the sealing between the sealing ring (5) and the telescopic part (2).

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