Stroke limiting device of straight-stroke intelligent electric actuating mechanism

Abstract

The utility model relates to the technical field of electric actuating mechanisms, in particular to a stroke limiting device of a linear-stroke intelligent electric actuating mechanism. A sliding block is fixed to the position, close to the outer surface of a port, of the output end, a fixing block is fixed to the surface of the inner side of the sliding block, a front baffle and a rear baffle are fixed to the inner wall of a through groove, a spring is arranged on the inner wall of the through groove, and a limiting block is movably arranged on the inner wall of the through groove. The output end moves to drive the sliding block to move on the surface of the fixing rod along the sliding groove, when the fixing block moves to the limiting block, the fixing block extrudes one end, located outside the through groove, of the limiting block, the limiting block is completely contained in the discharging groove, one end of the limiting block is contained in the through groove, and the other end of the limiting block rotates out of the through groove. When the actuating mechanism body rotates, one end of the rotating-out limiting block is clamped into the limiting groove, the limiting block is supported by the rear baffle, the sliding block cannot move at the moment, the output end cannot move, and limiting of the actuating mechanism body is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of electric actuators, in particular to a stroke limiting device for a linear stroke intelligent electric actuator. Background Technique

[0002] An actuator is a driving device that can provide linear or rotational motion. It uses a certain driving energy source and operates under the action of a certain control signal.

[0003] In the prior art, a linear stroke electric actuator is a common driving device. It involves converting electrical energy into mechanical energy by a motor, and converting the rotational motion of the motor into linear motion through a speed-changing mechanism and a motion conversion mechanism, so as to achieve the linear motion of the load.

[0004] However, the existing method for limiting the stroke of a linear stroke electric actuator is mainly to install the electric actuator above the valve body. However, the existing stroke limiting device of the electric actuator requires manual operation, and there are problems such as inconvenient and inaccurate stroke adjustment, and relatively complex structure. Content of the Utility Model

[0005] The purpose of the utility model is to provide a stroke limiting device for a linear stroke intelligent electric actuator to solve the problems proposed in the above background technique.

[0006] To achieve the above purpose, the utility model provides the following technical solution: A stroke limiting device for a linear stroke intelligent electric actuator, the stroke limiting device for the linear stroke intelligent electric actuator includes:

[0007] An actuator main body, one end of the actuator main body is fixed with an output end, a sliding block is fixed on the outer surface of the output end near the port, a fixed block is fixed on the inner surface of the sliding block, and a limiting groove is opened on the outer surface of the fixed block;

[0008] A fixed rod, a through groove is opened on the inner surface of the fixed rod, a front baffle and a rear baffle are fixed on the inner wall of the through groove, a spring is arranged on the inner wall of the through groove, and a limiting block is movably arranged on the inner wall of the through groove.

[0009] Preferably, a slider is fixed on the inner surface of the sliding block, a sliding groove is opened on the surface of the fixed rod, and the slider corresponds to and is clamped in the sliding groove, showing a movable connection.

[0010] Preferably, a rotating shaft is fixed at the center of the limiting block, a positioning hole is opened on the inner wall of the through groove, and the rotating shaft corresponds to and is clamped in the positioning hole.

[0011] Preferably, the limiting block and the through groove are fan-shaped, the diameter of the through groove is larger than the diameter of the limiting block, and the axes of the through groove and the limiting block coincide.

[0012] Preferably, a positioning plate is fixed on the arc surface of the limiting block, and the positioning plate is located between the front baffle and the rear baffle.

[0013] Preferably, one end of the spring is fixed on the surface of the positioning plate, and the other end of the spring is fixed on the surface of the rear baffle.

[0014] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0015] Starting the main body of the actuator drives the output end to move. The movement of the output end drives the sliding block to move along the sliding groove on the surface of the fixed rod. When the fixed block moves to the limiting block, the fixed block will squeeze one end of the limiting block located outside the through groove, so that the limiting block is completely received in the through groove. And because the end face angle of the limiting block is greater than a certain degree, when one end of the limiting block is received in the through groove, the other end will rotate out of the through groove. The end of the limiting block that rotates out will be stuck in the limiting groove, and the limiting block is supported by the rear baffle. At this time, the sliding block cannot move, so that the output end cannot move, realizing the limitation of the main body of the actuator. This limiting method can be automatically completed without manual operation, improving the accuracy of the limitation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a three-dimensional schematic diagram of the overall structure of the present utility model;

[0017] Figure 2 is a three-dimensional schematic diagram of the structure of the sliding assembly of the present utility model;

[0018] Figure 3 is a partially cut-away three-dimensional schematic diagram of the structure of the sliding block of the present utility model;

[0019] Figure 4 is an exploded cut-away three-dimensional schematic diagram of the structure of the limiting block assembly of the present utility model;

[0020] Figure 5 is a cut-away three-dimensional schematic diagram of the structure of the fixed block of the present utility model.

[0021] In the figure: 1, main body of the actuator; 2, output end; 3, sliding block; 4, fixed rod; 5, limiting block; 6, sliding groove; 7, limiting groove; 8, slider; 9, fixed block; 10, positioning plate; 11, rotating shaft; 12, spring; 13, positioning hole; 14, through groove; 15, front baffle; 16, rear baffle. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] In order to clearly and completely describe the purpose, technical solution of the present utility model, and make the advantages more clearly understood, the following further details the embodiments of the present utility model with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are part of the embodiments of the present utility model, rather than all embodiments, and are only used to explain the embodiments of the present utility model, not to limit the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present utility model.

[0023] Please refer to Figures 1 to 5 , the present utility model provides a technical solution: a stroke limiting device for a linear intelligent electric actuator.

[0024] In the first embodiment, one end of the actuator main body 1 is fixed with an output end 2. A sliding block 3 is fixed on the outer surface of the output end 2 near the port. A fixed block 9 is fixed on the inner surface of the sliding block 3, and a limiting groove 7 is opened on the outer surface of the fixed block 9.

[0025] A through groove 14 is opened on the inner surface of the fixed rod 4. A front baffle 15 and a rear baffle 16 are fixed on the inner wall of the through groove 14. A spring 12 is provided on the inner wall of the through groove 14, and a limiting block 5 is movably arranged on the inner wall of the through groove 14.

[0026] On the basis of the first embodiment, in order to realize the limitation of the actuator main body 1, a slider 8 is fixed on the inner surface of the sliding block 3. A sliding groove 6 is opened on the surface of the fixed rod 4. The slider 8 corresponds to the sliding groove 6 and is engaged therewith, showing a movable connection.

[0027] A rotating shaft 11 is fixed at the center of the limiting block 5. A positioning hole 13 is opened on the inner wall of the through groove 14. The rotating shaft 11 corresponds to the positioning hole 13 and is engaged therewith.

[0028] The limiting block 5 and the through groove 14 are fan-shaped. The diameter of the through groove 14 is larger than the diameter of the limiting block 5, and the centers of the through groove 14 and the limiting block 5 coincide.

[0029] A positioning plate 10 is fixed on the arc surface of the limiting block 5. The positioning plate 10 is located between the front baffle 15 and the rear baffle 16.

[0030] One end of the spring 12 is fixed on the surface of the positioning plate 10, and the other end of the spring 12 is fixed on the surface of the rear baffle 16.

[0031] During actual use, under the abutment of the spring 12, the positioning plate 10 will be in contact with the front baffle 15, causing one end of the limiting block 5 to rotate out of the through groove 14 and the other end of the limiting block 5 to be received in the through groove 14. At this time, the main body 1 of the actuating mechanism is started to drive the output end 2 to move. The movement of the output end 2 will drive the sliding block 3 to move along the sliding groove 6 on the surface of the fixed rod 4. The movement of the sliding block 3 will drive the fixed block 9 to move. When the fixed block 9 moves to the position of the limiting block 5, the fixed block 9 will squeeze one end of the limiting block 5 located outside the through groove 14, so that the limiting block 5 is completely received in the through groove 14. Since the end face angle of the limiting block 5 is greater than 180 degrees, when one end of the limiting block 5 is received in the through groove 14, the other end will rotate out of the through groove 14. The end of the limiting block 5 that rotates out will be stuck in the limiting groove 7, and the limiting block 5 is supported by the rear baffle 16. At this time, the sliding block 3 cannot move, so that the output end 2 cannot move, realizing the limitation of the main body 1 of the actuating mechanism. This limiting method can be automatically completed without manual operation, improving the accuracy of limitation.

[0032] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A stroke limit device for a direct stroke intelligent electric actuator, characterized in that: The linear travel intelligent electric actuator travel limit device includes: An actuator body (1), one end of the actuator body (1) is fixed with an output end (2), a sliding block (3) is fixed on the outer surface of the output end (2) near the port, a fixed block (9) is fixed on the inner surface of the sliding block (3), and a limit groove (7) is provided on the outer surface of the fixed block (9); A fixed rod (4), a through groove (14) is provided on the inner surface of the fixed rod (4), a front baffle (15) and a rear baffle (16) are fixed on the inner wall of the through groove (14), a spring (12) is provided on the inner wall of the through groove (14), and a limit block (5) is movably provided on the inner wall of the through groove (14).

2. The stroke limit device of a linear intelligent electric actuator according to claim 1, wherein: A slider (8) is fixed on the inner surface of the sliding block (3), a sliding groove (6) is provided on the surface of the fixed rod (4), and the slider (8) corresponds to the sliding groove (6) and is clamped, showing a movable connection.

3. The stroke limit device of a linear intelligent electric actuator according to claim 2, characterized in that: A rotating shaft (11) is fixed at the center of the limit block (5), a positioning hole (13) is provided on the inner wall of the through groove (14), and the rotating shaft (11) corresponds to the positioning hole (13) and is clamped.

4. The stroke limit device of a linear intelligent electric actuator according to claim 3, characterized in that: The limit block (5) and the through groove (14) are fan-shaped, the diameter of the through groove (14) is larger than the diameter of the limit block (5), and the centers of the through groove (14) and the limit block (5) coincide.

5. The stroke limit device of a linear intelligent electric actuator according to claim 4, characterized in that: A positioning plate (10) is fixed on the arc surface of the limit block (5), and the positioning plate (10) is located between the front baffle (15) and the rear baffle (16).

6. The stroke limit device of a linear intelligent electric actuator according to claim 5, characterized in that: One end of the spring (12) is fixed on the surface of the positioning plate (10), and the other end of the spring (12) is fixed on the surface of the rear baffle (16).

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