Novel switching device for electric actuator

Abstract

The utility model provides a novel switching device for an electric actuator, which comprises a main shaft in transmission connection with an output shaft in the electric actuator, a plurality of guide grooves formed in the side part of the main shaft in an array manner, and clutches arranged in the guide grooves in a sliding manner, a connecting sleeve I is rotationally arranged at one end of the main shaft, and a hand wheel is connected to one end of the connecting sleeve I; a second connecting sleeve is rotationally arranged on the side portion of the main shaft, a worm wheel in transmission connection with a motor in the electric actuator is arranged on one side of the second connecting sleeve, and the clutch is separately connected with the other side of the first connecting sleeve and the other side of the second connecting sleeve. According to the novel switching device for the electric actuator, due to the arrangement of the first lubricating groove and the second lubricating groove, more lubricating oil is filled between the guide block of the clutch and the guide groove of the main shaft, the lubricating effect is better, clamping stagnation is not prone to occurring when the operation mode is switched, switching between the manual mode and the automatic mode is more flexible, and the switching efficiency is improved. And the switching effect of the electric actuator is better.

Description

Technical Field

[0001] The utility model relates to the technical field of electric actuators, in particular to a novel switching device used for electric actuators. Background Art

[0002] An electric actuator is a driving device that can provide linear or rotary motion. It is a commonly used actuator in industrial automation control. Its function is to receive instructions and signals from the electrical control cabinet, drive the corresponding mechanism to perform corresponding actions, and transmit the power to the valve stem of the valve through the output shaft of the electric actuator, thereby controlling the opening and closing of the valve or controlling the valve opening. Currently, commonly used electric actuators are usually set with two execution modes: automatic and manual. The manual-automatic switching device is used to realize the power output of the motor or manual to the main shaft. Then the main shaft is connected to the output shaft in the electric actuator through the reduction mechanism, and the power is output to the valve stem of the valve through the output shaft, thereby opening and closing the valve.

[0003] However, the existing switching device for electric actuators is prone to getting stuck when switching operating modes, and the mode switching is not flexible, resulting in inconvenience in using the electric actuator. This solution solves this technical problem. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a novel switching device for an electric actuator.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is as follows: a new switching device for an electric actuator, comprising a main shaft connected to the output shaft of the electric actuator, a plurality of guide grooves are arranged in an array on the side of the main shaft, and a clutch is slidably arranged in the guide groove, a connecting sleeve 1 is rotatably arranged at one end of the main shaft, a hand wheel is connected to one end of the connecting sleeve 1, a connecting sleeve 2 is rotatably arranged on the side of the main shaft, a worm gear connected to the motor of the electric actuator is arranged on one side of the connecting sleeve 2, and the clutch is detachably connected to the other side of the connecting sleeve 1 and the other side of the connecting sleeve 2 respectively;

[0006] The clutch is an annular structure, and the inner array of the clutch is provided with guide blocks corresponding to the guide grooves. The clutch is slidably arranged in the guide grooves through the guide blocks. The side array of the guide grooves is provided with a plurality of lubrication grooves 1, and the side of the guide block is provided with a plurality of lubrication grooves 2. The lubrication grooves 1 and 2 are filled with lubricating grease.

[0007] The guide block is provided with a lubrication cavity along the axial direction of the main shaft, and the plurality of lubrication grooves are all connected to the lubrication cavity, and an oil storage device is detachably provided in the lubrication cavity;

[0008] The oil storage device comprises a screw detachably connected to the guide block, a spring 1 connected to the screw, and a cotton strip inserted in the spring 1, wherein the cotton strip is rich in lubricating oil.

[0009] The other end of the connecting sleeve 1 is oppositely provided with two stoppers 1, and one end of the clutch is provided with a stopper 2 which is detachably abutted against the stopper 1;

[0010] The other end of the connecting sleeve 2 is provided with a plurality of stoppers 3 in an array, and the other end of the clutch is provided with a stopper 4 which is detachably abutted against the stopper 3.

[0011] A second spring is sleeved on the outer side of the main shaft, and two ends of the second spring are respectively in contact with the first stopper and the clutch.

[0012] A slide groove is provided on the side of the clutch, an operating rod is provided on the side of the clutch, the operating rod is swingably arranged in the electric actuator, one end of the operating rod is arranged in the slide groove, and the other end of the operating rod is a free end.

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

[0014] (1) By setting the lubrication groove 1 and the lubrication groove 2, more lubricating oil is filled between the guide block of the clutch and the guide groove of the main shaft, the lubrication effect is better, and it is not easy to get stuck when switching the operation mode. The switching of manual and automatic modes is more flexible, and the switching effect of the electric actuator is better;

[0015] (2) A lubrication chamber connected to the second lubrication groove is provided, and a cotton strip is provided in the lubrication chamber. When the clutch rotates, the lubricating oil in the cotton strip replenishes the lubricating oil in the lubrication groove, thereby further improving the lubrication effect of the clutch, making the lubrication of the clutch more durable, and increasing the switching efficiency of the electric actuator. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0017] Figure 2 It is a partial enlarged structural schematic diagram of the A part of the utility model.

[0018] Figure 3 It is a schematic diagram of the internal structure of the clutch of the utility model.

[0019] Figure 4 It is a schematic diagram of the transverse cross-sectional structure of the lubrication cavity of the utility model.

[0020] Among them, in the figure: 1, main shaft; 11, guide groove; 111, lubrication groove one; 2, clutch; 21, guide block; 211, lubrication groove two; 212, lubrication chamber; 22, stopper two; 23, stopper four; 24, slide groove; 25, oil storage device; 251, screw; 252, spring one; 253, cotton strip; 3, connecting sleeve one; 31, stopper one; 4, handwheel; 5, connecting sleeve two; 51, worm gear; 52, stopper three; 6, spring two; 7, operating lever. DETAILED DESCRIPTION

[0021] In order to more clearly illustrate the technical features of this solution, this solution is described below through specific implementation methods.

[0022] See also Figure 1-Figure 4 A novel switching device for an electric actuator comprises a main shaft 1 which is connected to the output shaft of the electric actuator in a transmission manner, a plurality of guide grooves 11 are arranged in an array on the side of the main shaft 1, and a clutch 2 which is slidably arranged in the guide groove 11, a connecting sleeve 1 3 is rotatably arranged at one end of the main shaft 1, a hand wheel 4 is connected to one end of the connecting sleeve 1 3, a connecting sleeve 2 5 is rotatably arranged at the side of the main shaft 1, a worm gear 51 which is connected to the motor in the electric actuator in a transmission manner is arranged on one side of the connecting sleeve 2 5, and the clutch 2 is detachably connected to the other side of the connecting sleeve 1 3 and the other side of the connecting sleeve 2 5 respectively;

[0023] The clutch 2 is an annular structure. The inner array of the clutch 2 is provided with a guide block 21 corresponding to the guide groove 11. The clutch 2 is slidably arranged in the guide groove 11 through the guide block 21. The side array of the guide groove 11 is provided with a plurality of lubrication grooves 111. The side of the guide block 21 is provided with a plurality of lubrication grooves 211. The lubrication grooves 111 and 211 are filled with lubricating grease.

[0024] The guide block 21 is provided with a lubrication cavity 212 along the axial direction of the main shaft 1, and a plurality of lubrication grooves 211 are all connected to the lubrication cavity 212, and a detachable oil storage device 25 is penetrated in the lubrication cavity 212;

[0025] The oil storage device 25 includes a screw 251 detachably connected to the guide block 21 , a spring 252 connected to the screw 251 , and a cotton strip 253 inserted in the spring 252 , wherein the cotton strip 253 is rich in lubricating oil.

[0026] The other end of the connecting sleeve 1 3 is oppositely provided with two stoppers 1 31, and one end of the clutch 2 is provided with a stopper 2 22 which is detachably abutted against the stopper 1 31;

[0027] The other end of the connecting sleeve 2 5 is provided with a plurality of stoppers 3 52 in an array, and the other end of the clutch 2 is provided with a stopper 4 23 which is detachably abutted against the stopper 3 52 .

[0028] A spring 2 6 is sleeved on the outer side of the main shaft 1 , and two ends of the spring 2 6 are respectively in contact with the stopper 1 31 and the clutch 2 .

[0029] A slide groove 24 is provided on the side of the clutch 2. An operating rod 7 is provided on the side of the clutch 2. The operating rod 7 is swingably provided in the electric actuator. One end of the operating rod 7 is provided in the slide groove 24, and the other end of the operating rod 7 is a free end.

[0030] The specific working process of this utility model:

[0031] When the electric actuator is in automatic operation mode, the clutch 2 is acted upon by the elastic force of the spring 2 6, and the block 4 23 is engaged with the block 3 52, so that the connecting sleeve 2 5 drives the clutch 2 to rotate, the clutch 2 drives the main shaft 1 to rotate, and the main shaft 1 drives the valve to open and close through the speed reduction mechanism;

[0032] In the automatic operation mode, the clutch 2 is subjected to the centrifugal force of rotation, and the lubricating oil in the cotton strip 253 in the lubricating chamber 212 seeps out and enters the lubricating groove 1 111 after passing through the lubricating groove 2 211 to lubricate the clutch 2 and the main shaft 1. At this time, the lubricating oil is retained in the lubricating groove 1 111 and the lubricating groove 2 211;

[0033] When it is necessary to switch to the manual operation mode, the operating lever 7 is pulled, and the operating lever 7 lifts the clutch 2 upward and overcomes the elastic force of the spring, so that the second block 22 of the clutch 2 is engaged with the block 1 31 of the connecting sleeve 1 3, and the guide block 21 slides in the guide groove 11, thereby realizing the lubrication of the clutch 2 by the lubricating oil in the lubricating groove 1 111 and the lubricating groove 2 211, thereby reducing the friction between the clutch 2 and the main shaft 1.

[0034] By setting the lubrication groove 111 and the lubrication groove 211, more lubrication oil is filled between the guide block 21 of the clutch 2 and the guide groove 11 of the main shaft 1, the lubrication effect is better, and it is not easy to get stuck when switching the operation mode. The switching of the manual and automatic modes is more flexible, and the switching effect of the electric actuator is better.

[0035] By providing a lubrication chamber 212 connected to the lubrication groove 211, and a cotton strip 253 is provided in the lubrication chamber 212, when the clutch 2 rotates, the lubricating oil in the cotton strip 253 supplements the lubricating oil in the lubrication groove 24, further improving the lubrication effect of the clutch 2, making the lubrication of the clutch 2 more lasting, and improving the switching efficiency of the electric actuator.

[0036] Technical features not described in the present invention can be achieved through or by adopting existing technologies, and will not be elaborated here. Of course, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions or substitutions made by ordinary technicians in this technical field within the essential scope of the present invention should also fall within the scope of protection of the present invention.

Claims

1. A novel switching device for an electric actuator, comprising a main shaft (1) drivingly connected to an output shaft in the electric actuator, characterized in that: The main shaft (1) is provided with a plurality of guide grooves (11) in an array on the side thereof, and further comprises a clutch (2) slidably arranged in the guide grooves (11); a connecting sleeve (3) is rotatably arranged on one end of the main shaft (1); one end of the connecting sleeve (3) is connected to a hand wheel (4); a connecting sleeve (5) is rotatably arranged on the side of the main shaft (1); a worm gear (51) connected to a motor in an electric actuator is arranged on one side of the connecting sleeve (5); and the clutch (2) is detachably connected to the other side of the connecting sleeve (3) and the other side of the connecting sleeve (5); The clutch (2) is an annular structure. A guide block (21) corresponding to the guide groove (11) is arranged in an array on the inner side of the clutch (2). The clutch (2) is slidably arranged in the guide groove (11) through the guide block (21). A plurality of lubrication grooves (111) are arranged in an array on the side of the guide groove (11). A plurality of lubrication grooves (211) are arranged on the side of the guide block (21). Lubrication grease is filled in the lubrication grooves (111) and the lubrication grooves (211).

2. The novel switching device for electric actuator according to claim 1 is characterized in that: The guide block (21) is provided with a lubrication cavity (212) along the axial direction of the main shaft (1); the plurality of lubrication grooves (211) are all in communication with the lubrication cavity (212); and an oil storage device (25) is detachably provided in the lubrication cavity (212); The oil storage device (25) comprises a screw (251) detachably connected to the guide block (21), a spring (252) connected to the screw (251), and a cotton strip (253) inserted into the spring (252), wherein the cotton strip (253) is rich in lubricating oil.

3. The novel switching device for electric actuator according to claim 2 is characterized in that: The other end of the connecting sleeve 1 (3) is oppositely provided with two first stoppers (31), and one end of the clutch (2) is provided with a second stopper (22) which is detachably abutted against the first stopper (31); The other end of the connecting sleeve 2 (5) is provided with a plurality of stoppers 3 (52) in an array, and the other end of the clutch (2) is provided with a stopper 4 (23) which is detachably abutted against the stopper 3 (52).

4. The novel switching device for electric actuator according to claim 3 is characterized in that: A second spring (6) is sleeved on the outer side of the main shaft (1), and two ends of the second spring (6) are respectively in contact with the first stopper (31) and the clutch (2).

5. The novel switching device for electric actuator according to claim 4 is characterized in that: A slide groove (24) is provided on the side of the clutch (2), an operating rod (7) is provided on the side of the clutch (2), the operating rod (7) is swingably arranged in the electric actuator, one end of the operating rod (7) is arranged in the slide groove (24), and the other end of the operating rod (7) is a free end.

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