Transmission mechanism of electric actuator

Abstract

The utility model belongs to the technical field of transmission of electric actuators, and particularly relates to a transmission mechanism of an electric actuator, which comprises a valve body with a driving shaft, a transmission shaft coaxial with the driving shaft is arranged on one side of the valve body, and an output shaft in butt joint is arranged between the transmission shaft and the driving shaft. An adjusting mechanism is arranged between the output shaft and the transmission shaft, the adjusting mechanism is used for driving the output shaft to be close to and in butt joint with one end of the driving shaft or be far away from and separated from one end of the driving shaft, the adjusting mechanism comprises a connecting ring, a spring and a conical plate, and the output shaft is rotationally installed on the connecting ring in a penetrating mode; by additionally arranging the output shaft and the adjusting mechanism which are in butt joint, the output shaft can be driven by the adjusting mechanism to axially reciprocate between the driving shaft and the transmission shaft, so that the transmission shaft and the driving shaft can be in movable butt joint conveniently, the output shaft can be prevented from being stressed all the time, and the service life of the output shaft is prolonged.

Description

Technical Field

[0001] The utility model belongs to the technical field of electric actuator transmission, and in particular relates to a transmission mechanism of an electric actuator. Background Art

[0002] The electric actuator is mainly composed of a servo amplifier, a servo motor, a transmission mechanism, a reducer, a position transmitter and an electric operator.

[0003] The transmission mechanism connects the power device and the load, transfers the power generated by the power device to the load, and thus makes the load run. The transmission mechanism is generally composed of a transmission shaft and transmission teeth. Under normal working conditions, the power output by the output device will be directly transmitted to the load through the transmission shaft, and there is no automatic disengagement device between the two. When the transmission shaft output reaches the maximum stroke, the transmission shaft cannot stop directly, resulting in excessive output torque of the transmission shaft, which will cause the transmission teeth to break and damage, thereby causing the equipment transmission to fail. Utility Model Content

[0004] The purpose of the present utility model is to provide a transmission mechanism of an electric actuator to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a transmission mechanism of an electric actuator, comprising: a valve body with a drive shaft, a transmission shaft coaxial with the drive shaft is provided on one side of the valve body, an output shaft for docking is provided between the transmission shaft and the drive shaft, an adjustment mechanism is provided between the output shaft and the transmission shaft, and the adjustment mechanism is used to drive one end of the output shaft to approach docking or move away from the drive shaft.

[0006] Preferably, the adjusting mechanism includes a connecting ring, a spring and a conical plate, the output shaft is rotatably installed on the connecting ring, the spring is installed in the axial direction between the output shaft and the transmission shaft, a motor is installed on the valve body, one end of the conical plate is eccentrically installed on the output end of the motor, and one end of the conical plate abuts against the connecting ring, so that the connecting ring moves closer to or away from one side of the drive shaft based on rotation.

[0007] Preferably, a guide rod for guiding is further provided in the axial direction of one side of the output shaft, and a guide block abutting against the conical plate is provided on the connecting ring, and a guide hole for accommodating the guide rod to pass through is penetrated through the guide block.

[0008] Preferably, a rotating ring for rotation is further provided on the inner wall of the connecting ring, and a ring groove for accommodating the rotation of the rotating ring is opened on the outer wall of the output shaft.

[0009] Preferably, a first spline groove is formed at the end of the drive shaft, and a butt end that cooperates with the first spline groove is formed at the end of the output shaft, and the butt end can be inserted into the first spline groove.

[0010] Preferably, a second spline groove is further provided at the end of the transmission shaft, a spline rod extending into the second spline groove is provided at the rotation axis of one end of the output shaft, and the spring is installed between the end of the spline rod and the second spline groove.

[0011] Compared with the prior art, the present invention has the following beneficial effects:

[0012] (1) The utility model adds a docking output shaft and an adjustment mechanism, and the adjustment mechanism can drive the output shaft to move axially back and forth between the drive shaft and the transmission shaft, thereby facilitating the active docking of the transmission shaft and the drive shaft, avoiding the output shaft from being constantly stressed, and improving the service life of the output shaft.

[0013] (2) The utility model adds a conical plate, a motor and a connecting ring. When the motor is started, the connecting ring is driven to move axially back and forth along the shape of the conical plate, thereby facilitating the docking or disconnection of the output shaft and the drive shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a first structural diagram of the utility model;

[0015] Figure 2 This is a second structural diagram of the present utility model;

[0016] Figure 3 This is a three-dimensional diagram of the output shaft, connecting ring and guide block of the utility model;

[0017] Figure 4 It is a three-dimensional diagram of the connecting ring and the rotating ring of the utility model;

[0018] Figure 5 This is a structural diagram of the connecting ring, rotating ring and ring groove of the utility model;

[0019] In the figure: 1. Valve body; 2. Drive shaft; 3. First spline groove; 4. Output shaft; 5. Connecting ring; 6. Rotating ring; 7. Ring groove; 8. Transmission shaft; 9. Second spline groove; 10. Spring; 11. Spline rod; 12. Guide rod; 13. Guide block; 14. Conical plate; 15. Motor; 16. Guide hole. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0021] refer to Figure 1-2 As shown, the utility model provides a transmission mechanism of an electric actuator, comprising: a valve body 1 with a drive shaft 2, a transmission shaft 8 coaxial with the drive shaft 2 is provided on one side of the valve body 1, an output shaft 4 is provided between the transmission shaft 8 and the drive shaft 2, and an adjustment mechanism is provided between the output shaft 4 and the transmission shaft 8, and the adjustment mechanism is used to drive the output shaft 4 to approach or disengage from one end of the drive shaft 2.

[0022] As mentioned above, when using the valve body 1, transmission shaft 8, drive shaft 2 and adjustment mechanism provided by the present invention, the adjustment mechanism can drive the output shaft 4 to be pushed away from the drive shaft 2, thereby facilitating the disconnection of the output shaft 4 from the drive shaft 2, thereby enabling the device to directly disconnect the transmission and avoiding continuous damage to the output shaft 4.

[0023] Furthermore, in order to facilitate the docking of the output shaft 4 with the drive shaft 2, refer to Figure 1-3 As shown, a first spline groove 3 is provided at the end of the drive shaft 2, and a docking end is provided at the end of the output shaft 4 that cooperates with the first spline groove 3, and the docking end can be inserted into the first spline groove 3. When the output shaft 4 is close to the drive shaft 2, the docking end on the output shaft 4 is inserted into the first spline groove 3. At this time, the output shaft 4 is dynamically connected to the drive shaft 2. When the transmission shaft 8 rotates, the output shaft 4 rotates accordingly, thereby driving the drive shaft 2 to rotate.

[0024] In this utility model, combined with Figure 3-5 As shown, the adjustment mechanism of this embodiment includes a connecting ring 5, a spring 10 and a conical plate 14. The output shaft 4 is rotatably installed on the connecting ring 5. The spring 10 is installed in the axial direction between the output shaft 4 and the transmission shaft 8. A motor 15 is installed on the valve body 1. One end of the conical plate 14 is eccentrically installed on the output end of the motor 15, and one end of the conical plate 14 abuts against the connecting ring 5. Based on the rotation, the connecting ring 5 moves closer to or away from one side of the drive shaft 2.

[0025] As mentioned above, when using the adjustment mechanism provided by the present invention, the conical plate 14 in the adjustment mechanism is divided into a large head end and a small head end. The large head end of the conical plate 14 is connected to the output end of the motor 15. When the motor 15 is started, the side wall of the conical plate 14 will abut against the connecting ring 5. During the continuous rotation of the conical plate 14, the connecting ring 5 will be pushed away to the side away from the drive shaft 2 through the side wall of the conical plate 14, thereby facilitating the disconnection of the output shaft 4 from the drive shaft 2.

[0026] Furthermore, in order to prevent the connecting ring 5 from rotating with the output shaft 4, refer to Figure 1-2 As shown, a guide rod 12 is provided in the axial direction on one side of the output shaft 4 for guidance. The connecting ring 5 is provided with a guide block 13 that abuts against the tapered plate 14. The guide block 13 is penetrated by a guide hole 16 for accommodating the guide rod 12. The guide block 13 and the guide rod 12 guide the axial movement of the connecting ring 5, preventing the connecting ring 5 from rotating with the output shaft 4.

[0027] Furthermore, in order to facilitate the rotation of the output shaft 4 in the connecting ring 5, refer to Figure 4-5 As shown, the inner wall of the connecting ring 5 is further provided with a rotating ring 6 for rotation, and the outer wall of the output shaft 4 is provided with an annular groove 7 to accommodate the rotation of the rotating ring 6. The output shaft 4 is rotatably mounted in the connecting ring 5 via the annular groove 7 and the rotating ring 6. When the output shaft 4 rotates, the connecting ring 5 does not rotate with it.

[0028] Further, in order to facilitate the output shaft 4 to be telescopic on the transmission shaft 8, refer to Figure 1-2 As shown, a second spline groove 9 is further formed at the end of the transmission shaft 8, and a spline rod 11 extending into the second spline groove 9 is provided at the rotation axis of one end of the output shaft 4. A spring 10 is installed between the end of the spline rod 11 and the second spline groove 9. The output shaft 4 is dynamically connected to the spline rod 11 through the second spline groove 9 during the extension and contraction process, so that when the transmission shaft 8 rotates, the output shaft 4 rotates accordingly, and the spring 10 can be axially extended between the spline rod 11 and the transmission shaft 8 through the second spline groove 9.

[0029] Although the 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 variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A transmission mechanism of an electric actuator, characterized in that: include: A valve body (1) is provided with a drive shaft (2), a transmission shaft (8) coaxial with the drive shaft (2) is provided on one side of the valve body (1), an output shaft (4) is provided between the transmission shaft (8) and the drive shaft (2), an adjustment mechanism is provided between the output shaft (4) and the transmission shaft (8), and the adjustment mechanism is used to drive the output shaft (4) to approach or disengage from one end of the drive shaft (2).

2. The transmission mechanism of an electric actuator according to claim 1, characterized in that: The regulating mechanism comprises a connecting ring (5), a spring (10) and a conical plate (14); the output shaft (4) is rotatably mounted on the connecting ring (5); the spring (10) is mounted in the axial direction between the output shaft (4) and the transmission shaft (8); a motor (15) is mounted on the valve body (1); one end of the conical plate (14) is eccentrically mounted on the output end of the motor (15), and one end of the conical plate (14) abuts against the connecting ring (5), so that the connecting ring (5) moves closer to or farther from one side of the drive shaft (2) based on rotation.

3. The transmission mechanism of an electric actuator according to claim 2, characterized in that: A guide rod (12) for guiding is also provided in the axial direction of one side of the output shaft (4); a guide block (13) abutting against the conical plate (14) is provided on the connecting ring (5); and a guide hole (16) for accommodating the guide rod (12) passing through is passed through the guide block (13).

4. The transmission mechanism of an electric actuator according to claim 2, characterized in that: A rotating ring (6) for rotation is also provided on the inner wall of the connecting ring (5), and a ring groove (7) for accommodating the rotation of the rotating ring (6) is provided on the outer wall of the output shaft (4).

5. The transmission mechanism of an electric actuator according to claim 2, characterized in that: The end of the drive shaft (2) is provided with a first spline groove (3), and the end of the output shaft (4) is provided with a butt end that matches the first spline groove (3), and the butt end can be inserted into the first spline groove (3).

6. The transmission mechanism of an electric actuator according to claim 1, characterized in that: The end of the transmission shaft (8) is also provided with a second spline groove (9); a spline rod (11) extending into the second spline groove (9) is provided at the rotation axis of one end of the output shaft (4); and a spring (10) is installed between the end of the spline rod (11) and the second spline groove (9).

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