Angular travel actuator

Abstract

The utility model discloses an angular travel actuator which comprises a shell, an output shaft rotationally installed on the shell, a driving source installed on the shell, a worm gear installed in the shell and rotating along with the output shaft and a worm, and the worm is arranged in the shell in a sliding mode and reciprocates towards one side of the worm gear. The shell is provided with a control assembly used for controlling the worm to move, a linkage assembly is arranged between the worm and a power shaft of the driving source, the linkage assembly has a separation state and a linkage state, the output shaft is connected with an emergency control piece used for controlling the output shaft to rotate, and the emergency control piece is located on the outer side of the shell. The utility model has the following advantages and effects: the influence of output end faults on the execution end can be reduced, so that the actuator has higher safety performance.

Description

TECHNICAL FIELD

[0001] The utility model relates to an actuator, in particular to an angular stroke actuator. BACKGROUND

[0002] The actuator is an important component of the automatic control system. Its function is to accept the control signal sent by the controller, change the size of the controlled medium, and maintain the controlled variable at the required value or within a certain range. The actuator can be divided into three categories according to its energy form: pneumatic, hydraulic and electric. Different types of actuators have their own characteristics and application scenarios, and users should choose the appropriate actuator type according to actual needs.

[0003] The existing actuator execution mechanism structure includes a worm gear, which realizes the execution power output through the worm gear. However, this kind of execution mechanism has the disadvantage that when the output end fails, the action of the execution end will be affected under the interference of the worm gear mechanism, and the control of the execution end can only be restored by completely solving the output end failure. When the output end failure processing time is long, it will affect the emergency loss of control time of the execution end, and further expand the impact of the failure. INVENTION CONTENTS

[0004] The purpose of the utility model is to provide an angular stroke actuator, which can reduce the impact of output end failure on the execution end, and make the actuator have higher safety performance.

[0005] The above technical purpose of the utility model is realized by the following technical scheme: an angular stroke actuator, comprising a shell, an output shaft rotatably installed in the shell, a drive source installed in the shell, a worm gear installed in the shell and rotating with the output shaft, and a worm gear, the worm gear is slidably arranged in the shell and reciprocally moves towards the worm gear side, the shell is provided with a control assembly for controlling the movement of the worm gear, the worm gear and the power shaft of the drive source are provided with a linkage assembly, the linkage assembly has a separation state and a linkage state, the output shaft is connected with an emergency control member for controlling the rotation of the output shaft and the emergency control member is located outside the shell.

[0006] By adopting the above technical scheme, the power shaft of the drive source drives the worm gear to rotate through the linkage assembly, and the rotating worm gear drives the output shaft to rotate in cooperation with the worm gear, so as to realize the execution output of power. When the drive source fails, the worm gear moves away from the worm gear by controlling the control assembly, so that the two are not engaged, and the emergency rotation of the output shaft can be controlled by the emergency control member. This kind of setting structure can reduce the impact of output end failure on the execution end, and make the actuator have higher safety performance.

[0007] Further arrangement is that the worm gear and the power shaft are located on the same side of the worm shaft axis.

[0008] By adopting the above technical scheme, the movement of the worm does not interfere with the structure of the linkage assembly, thereby ensuring the feasibility of the scheme.

[0009] Further arrangement is that the shell is provided with a slide channel extending along the sliding direction of the worm, the slide is slidingly arranged in the slide channel, and the worm is rotationally arranged in the slide.

[0010] By adopting the above technical scheme, the slide channel and the slide are arranged to realize the movement of the worm in the shell.

[0011] Further arrangement is that a limiting structure is formed between the slide and the slide channel, the slide moves towards the side of the worm gear and includes a moving stroke and a limiting position, and when the slide is in the limiting position, the limiting structure limits the movement of the slide along the worm shaft axis and the engagement of the worm and the worm gear.

[0012] By adopting the above technical scheme, the limiting structure limits the axial movement of the worm when the worm and the worm gear are in the engagement state, thereby ensuring the structural stability of the worm in the engagement state and avoiding the tooth collapse or damage between the worm and the worm gear due to shaking. The setting structure can also compensate for the fitting tolerance of the sliding structure.

[0013] Further arrangement is that the limiting structure includes a limiting slope arranged at one end of the slide channel and inclined towards one side along the length direction of the slide channel, and a matching slope formed on the slide and matched with the limiting slope, and the limiting structure is symmetrically arranged along the length direction of the slide channel.

[0014] By adopting the above technical scheme, the matching slope abuts against the limiting slope to limit the movement of the slide along the axis of the worm.

[0015] Further arrangement is that the control assembly includes a control bolt screw-connected with the shell and abutting against the side of the worm gear opposite to the slide, and a return spring driving the slide to move opposite to the worm gear.

[0016] By adopting the above technical scheme, the control bolt cooperates with the return spring to control the reciprocating movement of the slide.

[0017] Further arrangement is that the linkage assembly includes a driving linkage gear arranged on the power shaft and a driven linkage gear arranged on the worm.

[0018] By adopting the above technical scheme, the driving linkage gear and the driven linkage gear cooperate to realize the linkage between the power shaft and the worm and have a separated state and a linked state.

[0019] Further arrangement is that the emergency control member is an emergency groove arranged on the end face of the output shaft, the shell is provided with a cover arranged on the output shaft, and the cover is magnetically fixed to the shell.

[0020] By adopting the technical scheme, the arrangement of the cover can avoid the external pollutants from entering the assembly gap between the output shaft and the shell, and then the emergency rotation control of the output shaft can be realized by inserting the tool into the emergency groove.

[0021] In conclusion, the utility model has the advantages that the utility model can reduce the influence of the output end failure on the execution end, and make the actuator have higher safety performance. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is a structural schematic view of an embodiment;

[0023] Figure 2 It is Figure 1 It is an enlarged view of A part in the middle;

[0024] Figure 3 It is a partial structural schematic view of an embodiment.

[0025] In the figure: 1, shell; 2, output shaft; 3, driving source; 4, worm wheel; 5, worm; 61, control bolt; 62, return spring; 71, driving linkage gear; 72, driven linkage gear; 9, sliding seat; 10, slide; 11, limiting structure; 111, limiting inclined surface; 112, matching inclined surface; 12, cover; 13, power shaft; 14, emergency control member. DETAILED DESCRIPTION

[0026] The utility model will be further explained in detail in combination with the drawings.

[0027] Reference Figures 1 to 3 A kind of angular travel actuator, including shell 1, output shaft 2 rotatably installed in shell 1, driving source 3 installed in shell 1, worm wheel 4 and worm 5 installed in shell 1 and fixedly connected with output shaft 2.Worm 5 is slidably arranged in shell 1 and reciprocates towards the side of worm wheel 4, and shell 1 is provided with control assembly for controlling the movement of worm 5;Linkage assembly is arranged between worm 5 and the power shaft 13 of driving source 3, and the linkage assembly has a separation state and a linkage state.Output shaft 2 is connected with emergency control member 14 for controlling the rotation of output shaft 2 and emergency control member 14 is located outside shell 1.Driving source 3 is motor fixedly arranged on the outer wall of shell 1, and the power shaft 13 of motor extends into shell 1, and the power shaft 13 of motor is the output shaft of motor.

[0028] The worm wheel 4 and the power shaft 13 are located on the same side of the axis of the worm 5. The shell 1 is provided with a slide 10 extending along the sliding direction of the worm 5, and the slide 9 is slidingly arranged in the slide 10. The worm 5 is rotatably arranged in the slide 9 through a bearing, and the linkage assembly comprises a driving linkage gear 71 fixedly arranged on the power shaft 13 and a driven linkage gear 72 fixedly arranged on the worm 5.

[0029] The slide 9 and the slide 10 are provided with a limiting structure 11, and the slide 9 moves towards the side of the worm wheel 4 and includes a moving stroke and a limiting position. When the slide 9 is in the limiting position, the slide 9 is limited to move along the axis of the worm 5 by the limiting structure 11, and the worm 5 and the worm wheel 4 are in meshing state. The limiting structure 11 comprises a limiting inclined surface 111 obliquely arranged on one end of the slide 10 along the length direction of the slide 10 and a matching inclined surface 112 arranged on the slide 9 and matched with the limiting inclined surface 111. The limiting structure 11 is symmetrically arranged along the length direction of the slide 10.

[0030] The control assembly comprises a control bolt 61 screwed with the shell 1 and located on the side of the worm wheel 4 opposite to the slide 9, and a return spring 62 driving the slide 9 to move away from the worm wheel 4. The return spring 62 is sleeved on the control bolt 61 and fixedly connected with the shell 1 and the slide 9 at both ends, and the return spring 62 is a tensile spring. The emergency control member 14 is an emergency groove arranged on the end surface of the output shaft 2, and the cross section of the emergency groove is hexagonal. The shell 1 is provided with an isolation cover 12 covering the output shaft 2, the isolation cover 12 is magnetically fixed on the shell 1, a magnetic sheet is fixedly arranged on the isolation cover 12, and the material of the shell 1 is iron.

[0031] The specific embodiment is only an explanation of the utility model, and is not a limitation of the utility model. Those skilled in the art can make modifications to the embodiment without creative contribution after reading the specification, but as long as the modifications are within the scope of the claims of the utility model, they are protected by the patent law.

Claims

1. An angular stroke actuator comprising a housing (1), an output shaft (2) rotatably mounted to the housing (1), a drive source (3) mounted to the housing (1), a worm wheel (4) mounted within the housing (1) and rotatable with the output shaft (2), and a worm (5), characterized in that: The worm (5) is slidingly arranged in the housing (1) and reciprocally moves towards one side of the worm wheel (4), the housing (1) is provided with a control assembly for controlling the movement of the worm (5), the worm (5) and the power shaft (13) of the driving source (3) are provided with a linkage assembly, the linkage assembly has a separated state and a linked state, the output shaft (2) is connected with an emergency control member (14) for controlling the rotation of the output shaft (2) and the emergency control member (14) is located outside the housing (1).

2. The angular stroke actuator of claim 1, wherein: The worm wheel (4) and the power shaft (13) are located on the same side of the axis of the worm (5).

3. The angular stroke actuator of claim 1, wherein: The housing (1) is formed with a slide way (10) extending along the sliding direction of the worm (5), the slide way (10) is slidingly arranged in the housing (1), and the worm (5) is rotatably arranged in the slide way (10).

4. The angular stroke actuator of claim 3, wherein: The slide way (10) and the slide way (10) are formed with a limiting structure (11), the slide way (10) moves towards one side of the worm wheel (4) and includes a moving stroke and a limiting position, when the slide way (10) is in the limiting position, the slide way (9) is limited to move along the axis of the worm (5) by the limiting structure (11) and the worm (5) and the worm wheel (4) are in meshing state.

5. An angular stroke actuator according to claim 4, characterized in that: The limiting structure (11) includes a limiting slope (111) arranged at one end of the slide way (10) and inclined towards one side along the length direction of the slide way (10), and a matching slope (112) formed on the slide way (9) and matched with the limiting slope (111), the limiting structure (11) is symmetrically arranged along the length direction of the slide way (10).

6. The angular stroke actuator of claim 3, wherein: The control assembly includes a control bolt (61) threadedly connected with the housing (1) and located on the side of the worm wheel (4) opposite to the slide way (9), and a return spring (62) for driving the slide way (9) to move away from the worm wheel (4).

7. The angular stroke actuator of claim 3, wherein: The linkage assembly includes a driving linkage gear (71) arranged on the power shaft (13) and a driven linkage gear (72) arranged on the worm (5).

8. The angular stroke actuator of claim 1, wherein: The emergency control member is an emergency groove arranged on the end surface of the output shaft (2), the housing (1) is provided with an isolation cover (12) arranged on the output shaft (2), and the isolation cover (12) is magnetically attracted and fixed to the housing (1).

Images