Manual operation device of spring emergency cut-off electric actuating mechanism

Abstract

The utility model discloses a manual operation device of a spring emergency cut-off electric actuating mechanism, which is characterized in that the manual operation device of the spring emergency cut-off electric actuating mechanism comprises an upper shell, a lower shell, an output shaft fixing plate arranged on the lower shell, and a motor fixed on the output shaft fixing plate, the motor gear is installed on the motor shaft, the first-stage gear is meshed with the motor gear, the second-stage gear is meshed with the first-stage gear, the third-stage gear is meshed with the second-stage gear, the fourth-stage gear is meshed with the third-stage gear, the main gear is meshed with the fourth-stage gear, the output shaft is installed on the main gear, and meanwhile the elastic transmission gear is meshed with the fourth-stage gear. The spring gear shaft is meshed with the elastic transmission gear, the volute spiral spring is installed on the spring gear shaft, the manual shaft is installed on the fourth-stage gear, the manual block is fixed to the manual shaft, the positioning shaft is installed on the third-stage gear, the base plate, the spiral spring, the positioning plate and the clamping ring are installed on the positioning shaft, and the positioning pin is installed at the bottom of the lower shell. The lower end of the positioning shaft is a square shaft, the tail end of the positioning shaft is provided with a clamping groove, and the positioning plate is provided with a square hole and an arc groove. When the electric actuating mechanism is powered on, a motor operates to drive a motor gear, a first-stage gear, a second-stage gear, a third-stage gear, a fourth-stage gear, a main gear, an output shaft, an elastic transmission gear and a spring gear shaft to rotate, the spring gear shaft drives a volute spiral spring to contract, the electric actuating mechanism operates to a fully-open position, and after power failure, the contracted volute spiral spring releases elastic force to drive the electric actuating mechanism to rotate. The electric actuating mechanism is driven to close. When manual operation is needed, the manual block is rotated to drive the execution mechanism to operate, after the execution mechanism reaches an expected position, the positioning plate is pushed to compress the spiral spring, the positioning pin is inserted into the positioning plate arc groove, at the moment, the manual block is loosened, the positioning plate bears torque transmitted by the volute spiral spring, and friction is generated between the positioning plate arc groove and the positioning pin; when the electric actuating mechanism is powered on to operate, the positioning plate is subjected to reverse torque transmitted by the motor, friction between an arc groove of the positioning plate and the positioning pin is eliminated, the compressed spiral spring releases elastic force at the moment, the positioning plate is bounced off, and the electric actuating mechanism stops at the current position. The arc groove of the positioning plate is separated from the positioning pin, and manual operation is relieved.

Description

Technical Field:

[0001] The utility model belongs to the field of electric actuators, and particularly relates to a manual operation device for a spring emergency cut-off electric actuator. Background Art:

[0002] The existing manual operation device for a common spring emergency cut-off electric actuator has the following disadvantages: 1. After manually operating and rotating the actuator and then releasing the manual operation, under the action of the spring force, the actuator will return to its original position and cannot stop at the expected position; 2. There are potential safety hazards during the operation when the actuator is driven back by the spring force. Content of the Utility Model:

[0003] The purpose of the utility model is to provide a manual operation device for a spring emergency cut-off electric actuator, which has the advantages of simple operation, high safety, compact structure, low cost, and overcomes the disadvantages and deficiencies of the existing manual operation of a common spring emergency cut-off electric actuator.

[0004] To achieve the above purpose, the technical solution of the utility model is: A manual operation device for a spring emergency cut-off electric actuator, including an upper housing, a lower housing, an output shaft fixing plate installed on the lower housing, a motor fixed on the output shaft fixing plate, a motor gear installed on the motor shaft, a first-stage gear meshing with the motor gear, a second-stage gear meshing with the first-stage gear, a third-stage gear meshing with the second-stage gear, a fourth-stage gear meshing with the third-stage gear, a main gear meshing with the fourth-stage gear, an output shaft installed on the main gear, a spring transmission gear meshing with the fourth-stage gear at the same time, a spring gear shaft meshing with the spring transmission gear, a scroll spring installed on the spring gear shaft, a manual shaft installed on the fourth-stage gear, a manual block fixed on the manual shaft, a positioning shaft installed on the third-stage gear, a backing plate, a helical spring, a positioning plate and a snap ring installed on the positioning shaft, a positioning pin installed at the bottom of the lower housing, the lower end of the positioning shaft is a square shaft, a card slot is provided at the end of the positioning shaft, and a square hole and an arc groove are provided on the positioning plate.

[0005] According to the utility model, the achievable effects are:

[0006] When the electric actuator is powered on, the motor drives the motor gear, the first gear, the second gear, the third gear, the fourth gear, the main gear, the output shaft, the elastic transmission gear, and the spring gear shaft to rotate. The spring gear shaft drives the scroll spring to contract, and the electric actuator runs to the fully open position. When the power is off, the contracted scroll spring releases the elastic force and drives the electric actuator to close. When manual operation is required, the manual block is turned to drive the actuator to run. After reaching the expected position, the positioning plate is pushed to compress the spiral spring so that the positioning pin is inserted into the circular arc groove of the positioning plate. At this time, the manual block is released, and the positioning plate is subjected to the torque transmitted by the scroll spring. Friction is generated between the circular arc groove of the positioning plate and the positioning pin, so that the positioning plate cannot be bounced open by the spiral spring. The electric actuator stays at the current position, realizing the manual operation function. When the electric actuator is powered on, the positioning plate is subjected to the reverse torque transmitted by the motor, eliminating the friction between the circular arc groove of the positioning plate and the positioning pin. At this time, the compressed spiral spring releases the elastic force, bounces open the positioning plate, and the circular arc groove of the positioning plate is separated from the positioning pin, and the manual operation is automatically released. Description of the drawings:

[0007] Figure 1 This is a schematic diagram of the structure of the utility model

[0008] Figure 2 This is a schematic diagram of the transmission structure of the utility model

[0009] Figure 3 This is a schematic diagram of the positioning structure before manual operation of the utility model

[0010] Figure 4 This is a schematic diagram of the positioning structure of the utility model during manual operation

[0011] Figure 5 This is a schematic diagram of the manual operation structure of the utility model

[0012] Figure 6 This is a schematic diagram of the positioning structure of the utility model

[0013] Figure 7 This is a schematic diagram of the manual shaft of the utility model

[0014] Figure 8 This is a schematic diagram of the manual block of the utility model

[0015] Figure 9 This is a schematic diagram of the positioning shaft of the utility model

[0016] Figure 10 This is a schematic diagram of the positioning plate of the utility model

[0017] Figure 11 Schematic diagram of the utility model pad

[0018] Figure 12 This is the appearance diagram of the utility model

[0019] In Figure 1 , 1 is a spring gear shaft, 2 is a scroll spring, 3 is an output shaft fixing plate, 4 is a four-stage gear, 5 is a main gear, 6 is an output shaft, 7 is a manual block, 8 is a helical spring, 9 is a positioning shaft, 10 is a positioning plate, 11 is a positioning pin, 12 is a two-stage gear, 13 is a one-stage gear, 14 is a lower housing, 15 is a motor gear, 16 is a motor, and 17 is an upper housing.

[0020] In Figure 2 , 1 is a spring gear shaft, 4 is a four-stage gear, 5 is a main gear, 6 is an output shaft, 12 is a two-stage gear, 13 is a one-stage gear, 18 is a three-stage gear, and 19 is an elastic transmission gear.

[0021] In Figure 3 , 8 is a helical spring, 9 is a positioning shaft, 10 is a positioning plate, 11 is a positioning pin, 14 is a lower housing, 20 is a backing plate, and 21 is a snap ring.

[0022] In Figure 4 , 8 is a helical spring, 9 is a positioning shaft, 10 is a positioning plate, 11 is a positioning pin, 14 is a lower housing, 20 is a backing plate, and 21 is a snap ring.

[0023] In Figure 5 , 4 is a four-stage gear, 7 is a manual block, and 22 is a manual shaft.

[0024] In Figure 6 , 8 is a helical spring, 9 is a positioning shaft, 10 is a positioning plate, 18 is a three-stage gear, and 20 is a backing plate.

[0025] In Figure 7 , 22 is a manual shaft.

[0026] In Figure 8 , 7 is a manual block.

[0027] In Figure 9 , 9 is a positioning shaft, 9-1 is a square shaft, and 9-2 is a card slot.

[0028] In Figure 10 , 10 is a positioning plate, 10-1 is a square hole, and 10-2 is an arc groove.

[0029] In Figure 11 , 20 is a backing plate.

[0030] Figure 12 This is the external view of the present utility model. Specific implementation manner:

[0031] The following will refer to the attached drawings to describe the present utility model in detail:

[0032] The utility model discloses a manual operating device for a spring emergency cut-off electric actuator, comprising an upper shell 17, a lower shell 14, an output shaft fixing plate 3 installed on the lower shell, a motor 16 fixed on the output shaft fixing plate, a motor gear 15 installed on the motor shaft, a primary gear 13 meshing with the motor gear, a secondary gear 12 meshing with the primary gear, a third gear 17 meshing with the second gear, a fourth gear 4 meshing with the third gear, a main gear 5 meshing with the fourth gear, an output shaft 6 installed on the main gear, and a motor 16 meshing with the fourth gear. An elastic transmission gear 18 meshed with the wheel, a spring gear shaft 1 meshed with the elastic transmission gear, a scroll spring 2 installed on the spring gear shaft, a manual shaft 21 installed on the four-stage gear, a manual block 7 fixed on the manual shaft, a positioning shaft 9 installed on the three-stage gear, a pad 19, a spiral spring 8, a positioning plate 10 and a retaining ring 20 installed on the positioning shaft, a positioning pin 11 installed on the bottom of the lower shell body, the lower end of the positioning shaft is set as a square shaft 9-1, the end of the positioning shaft is provided with a card slot 9-2, and the positioning plate is provided with a square hole 10-1 and an arc groove 10-2.

[0033] When the electric actuator is powered on, the motor (16) rotates to drive the motor gear (15), the first gear (13), the second gear (12), the third gear (18), the fourth gear (4), the main gear (5), the output shaft (6), the elastic transmission gear (19), and the spring gear shaft (1) to rotate. The spring gear shaft (1) drives the scroll spring (2) to contract, and the electric actuator runs to an open state. When the power is turned off, the contracted scroll spring (2) releases its elastic force, driving the electric actuator to close. When manual operation is required, the manual block (7) is rotated to drive the actuator to run. After reaching the expected position, the positioning plate is pushed to compress the spiral spring (8), so that the positioning pin (11) is inserted into the circular arc groove (10-2) of the positioning plate. At this time, the manual block is released, and the positioning plate is subjected to the torque transmitted by the spiral spring (2). Friction is generated between the circular arc groove (10-2) of the positioning plate and the positioning pin (11), so that the positioning plate (10) cannot be bounced open by the spiral spring (8). The electric actuator stays at the current position, realizing the manual operation function. When the electric actuator is powered on, the positioning plate (10) is subjected to the reverse torque transmitted by the motor (16), eliminating the friction between the circular arc groove (10-2) of the positioning plate and the positioning pin (10-1). At this time, the compressed spiral spring (8) releases its elastic force, bounces open the positioning plate (10), and disengages the circular arc groove (10-2) of the positioning plate from the positioning pin (11), thereby releasing the manual operation.

Claims

1. A manual operating device for a spring emergency cut-off electric actuator, characterized in that: It includes an upper housing (17), a lower housing (14), an output shaft fixing plate (3) installed on the lower housing, a motor (16) fixed on the output shaft fixing plate, a motor gear (15) installed on the motor shaft, a first-stage gear (13) meshing with the motor gear, a second-stage gear (12) meshing with the first-stage gear, a third-stage gear (18) meshing with the second-stage gear, a fourth-stage gear (4) meshing with the third-stage gear, a main gear (5) meshing with the fourth-stage gear, an output shaft (6) installed on the main gear, a resilient transmission gear (19) simultaneously meshing with the fourth-stage gear, a spring gear shaft (1) meshing with the resilient transmission gear, a volute spring (2) installed on the spring gear shaft, a manual shaft (22) installed on the fourth-stage gear, and a positioning shaft (9) installed on the third-stage gear.

2. The manual operating device for a spring emergency cut-off electric actuator according to claim 1, characterized in that: The manual shaft penetrates through the bottom of the lower housing, and a manual block (7) is installed on the manual shaft outside the lower housing.

3. The manual operating device for a spring emergency cut-off electric actuator according to claim 1, characterized in that: The lower end of the positioning shaft is a square shaft (9-1), and a card slot (9-2) is provided at the end of the positioning shaft.

4. The manual operating device for a spring emergency cut-off electric actuator according to claim 1, characterized in that: The positioning shaft penetrates through the bottom of the lower housing, and a backing plate (20), a helical spring (8), a positioning plate (10), and a snap ring (21) are installed on the positioning shaft outside the lower housing.

5. The manual operating device for a spring emergency cut-off electric actuator according to claim 1, characterized in that: A positioning pin (11) is installed at the bottom of the lower housing.

6. The manual operating device for a spring emergency cut-off electric actuator according to claim 1, characterized in that: The positioning plate is provided with a square hole (10-1) and an arc groove (10-2).

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