Compact electric actuating mechanism

Abstract

The utility model discloses a compact electric actuating mechanism, and aims to solve the problems that the existing electric actuating mechanism has the defects of complicated structure, clamping stagnation in action, time and labor waste and the like in the manual and electric switching mode, and certain adverse effects are brought to the use process of people. According to the technical scheme, the compact electric actuating mechanism is characterized by comprising a mechanism body, the mechanism body comprises a direct current motor, a worm and a worm gear, the direct current motor is used for driving the worm to rotate, the worm drives the worm gear to conduct transmission output, and a driving mechanism used for driving the worm gear to rotate is arranged on the mechanism body; the driving mechanism comprises a driving rod detachably connected to the worm gear and a driving wheel fixedly connected to the driving rod, and the diameter of the driving wheel is larger than that of the driving rod. According to the compact type electric actuating mechanism, a mode of converting electric driving into manual driving by a worker can be facilitated, the structure is simple, the operation of the worker is facilitated, and the efficiency of the worker is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of automated instruments and meters, and more specifically, to a compact electric actuator. Background Art

[0002] The most common definition of an actuator is: a drive device that can provide linear or rotary motion, which uses a certain driving energy and works under a certain control signal. The actuator uses liquid, gas, electricity or other energy and converts it into a driving action through a motor, cylinder or other device. Its basic types include part-turn, multi-turn and linear drive modes. At the same time, the existing intellectual mechanism has the advantages of compact structure and easy installation.

[0003] However, the existing electric actuators have certain drawbacks when in use. The structure has shortcomings such as low detection accuracy and inability to output torque values. The electric actuators have shortcomings such as complex structure, stuck action, time-consuming and labor-intensive switching in manual and electric modes, which have brought certain adverse effects to people's use process. Utility Model Content

[0004] In view of the deficiencies in the prior art, the purpose of the utility model is to provide a compact electric actuator that can facilitate workers to convert electric drive into manual drive mode, and has a simple structure to facilitate workers' operation and improve their efficiency.

[0005] The above technical purpose of the utility model is achieved through the following technical solutions: a compact electric actuator, including a mechanism body, the mechanism body including a DC motor, a worm and a worm wheel, the DC motor is used to drive the worm to rotate, the worm drives the worm wheel to transmit output, the mechanism body is provided with a driving mechanism for driving the worm wheel to rotate, the driving mechanism includes a driving rod detachably connected to the worm wheel and a driving wheel fixedly connected to the driving rod, the diameter of the driving wheel is larger than the diameter of the driving rod, the end of the driving rod close to the worm wheel is provided with a connecting part, the end of the worm wheel close to the driving rod is provided with a fixing part adapted to the connecting part, and the connecting part and the fixing part are detachably connected.

[0006] By adopting the above technical solution, when the mechanism body needs to convert the electric drive to the manual drive mode, the staff needs to turn off the DC motor so that the worm connected to the output shaft of the DC motor stops rotating, and the worm wheel meshing with the worm will no longer rotate. Then the staff needs to install the driving mechanism and the worm wheel together, and fix the driving rod on the worm wheel through the cooperation of the connecting part on the driving rod and the fixing part on the worm wheel. Then the staff drives the driving rod and the worm wheel to rotate through the driving wheel, so as to drive the mechanism body and convert the electric drive to the manual drive. The structure is simple and convenient for the staff to operate. The manual drive mode can facilitate the staff to better adjust the mechanism body, thereby facilitating the staff's operation and improving the staff's efficiency.

[0007] The utility model is further configured as follows: the connecting portion includes a sliding rod symmetrically slidably connected to the driving rod, a connecting block protrudingly arranged on the sliding rod, and a first spring abutting between the two sliding rods; the fixing portion includes a fixing groove opened on the worm gear, and the fixing groove is for the connecting block to be inserted.

[0008] By adopting the above technical solution, when the staff needs to install the driving rod on the worm gear, the staff first presses the two sliding rods to make the two sliding rods slide on the driving rod and squeeze the first spring between the two sliding rods, and then inserts the connecting block of the sliding rod into the fixing groove opened in the worm gear. After the positions of the connecting block and the fixing groove are relatively aligned, the staff withdraws the pressing force on the sliding rod, so that the first spring gradually extends and pushes the sliding rod under the action of its own elastic recovery, and the connecting block on the sliding rod will be completely stuck in the fixing groove. When the sliding rod is not subjected to external force, the connecting block will not easily fall off from the fixing groove, thereby achieving the fixation of the driving rod and the worm gear. Then, the staff can drive the rotation of the worm gear by turning the driving rod, and start and adjust the mechanism body. The simple structure is convenient for the staff to operate and can improve the staff's efficiency.

[0009] The utility model is further configured as follows: a fixing block is arranged at one end of the sliding rod close to the driving rod, and an inner groove for the fixing block to be inserted into is opened on the driving rod.

[0010] By adopting the above technical solution, the sliding rod is inserted into the inner groove of the driving rod through the fixing block, so that when the staff drives the sliding rod, the fixing block can move in the inner groove without causing the sliding rod to separate from the driving rod, thereby ensuring that the sliding rod and the driving rod are connected together, making it convenient to drive the sliding rod to realize the disassembly and assembly of the driving rod.

[0011] The utility model is further configured as follows: a second spring is arranged between the fixing block and the inner wall of the inner groove, and the second spring is used to prevent the fixing block from being separated from the inner groove.

[0012] By adopting the above technical solution, when the fixed block moves in the inner groove, the second spring arranged between the fixed block and the inner wall of the inner groove will limit the fixed block to prevent the fixed block from completely escaping from the inner groove, thereby ensuring that the staff can drive the sliding rod more stably. When the driving force on the sliding rod is withdrawn, the fixed block will gradually return to its original state under the action of the elastic force of the second spring itself.

[0013] The utility model is further configured as follows: a ball is rotatably connected to the side wall of the fixing groove.

[0014] By adopting the above technical solution, the arrangement of the balls can further clamp the connecting block, and drive the balls to roll when the connecting block moves, so as to facilitate the connecting block to be inserted into the fixing groove and to slide out of the fixing groove.

[0015] The utility model is further configured as follows: the connecting part comprises a magnetic block arranged on the driving rod, the fixing part comprises an electromagnet arranged on the worm gear, and the electromagnet adsorbs to the magnetic block after being energized.

[0016] By adopting the above technical solution, the driving rod can be adsorbed together with the magnetic block after the electromagnet is energized, thereby realizing the fixing and disassembly of the driving rod. The simple structure is convenient for the staff to operate, so that the staff can drive the rotation of the worm wheel by rotating the driving rod through the fixation of the driving rod and the worm wheel, which is convenient for the staff to drive and adjust.

[0017] The utility model is further configured as follows: the widths of the electromagnet and the magnetic block are both greater than the diameter of the driving rod.

[0018] By adopting the above technical solution, the driving rod can be better fixed on the worm gear, and it will be more stable when driving the driving rod.

[0019] In summary, the utility model has the following beneficial effects: through the action of the driving mechanism, it is convenient for the staff to convert the electric drive into the manual drive mode, and the simple structure facilitates the operation of the staff and improves the efficiency of the staff. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the structure of the mechanism body of the first embodiment of the utility model;

[0021] Figure 2 This is a schematic structural diagram of the connecting portion and the fixing portion of the first embodiment of the utility model;

[0022] Figure 3 It is a structural schematic diagram of the connecting part and the fixing part of the second embodiment of the utility model.

[0023] In the figure: 1. Mechanism body; 2. DC motor; 3. Worm; 4. Worm wheel; 5. Fixed groove; 6. Ball; 7. Driving rod; 8. Sliding rod; 9. Connecting block; 10. Fixed block; 11. First spring; 12. Second spring; 13. Inner groove; 14. Magnetic block; 15. Electromagnet. DETAILED DESCRIPTION

[0024] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present application and the features therein can be combined with each other without conflict.

[0025] In the description of the present invention, it should be noted that the terms "upper", "lower", "inside", "outside", "top / bottom" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0026] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "set / connected", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0027] The utility model is described in detail below in conjunction with the accompanying drawings.

[0028] A compact electric actuator, referring to Figure 1-Figure 2 , including a mechanism body 1, the mechanism body 1 includes a DC motor 2, a worm 3 and a worm wheel 4, the DC motor 2 is used to drive the worm 3 to rotate, the worm 3 drives the worm wheel 4 to transmit output, and a driving mechanism for driving the worm wheel 4 to rotate is provided on the mechanism body 1, the driving mechanism includes a driving rod 7 detachably connected to the worm wheel 4 and a driving wheel fixedly connected to the driving rod 7, the diameter of the driving wheel is larger than the diameter of the driving rod 7, a connecting portion is provided at one end of the driving rod 7 close to the worm wheel 4, and a fixing portion matched with the connecting portion is provided at one end of the worm wheel 4 close to the driving rod 7, and the connecting portion and the fixing portion are detachably connected.

[0029] Embodiment 1: The connecting portion includes a sliding rod 8 symmetrically slidably connected to the driving rod 7, a connecting block 9 protruding from the sliding rod 8, and a first spring 11 abutting between the two sliding rods 8, and the fixing portion includes a fixing groove 5 opened on the worm gear 4, and the fixing groove 5 is for the connecting block 9 to be inserted.

[0030] A fixing block 10 is provided at one end of the sliding rod 8 close to the driving rod 7. An inner groove 13 is provided on the driving rod 7 for the fixing block 10 to be inserted into. A second spring 12 is provided between the fixing block 10 and the inner wall of the inner groove 13. The second spring 12 is used to prevent the fixing block 10 from escaping from the inner groove 13.

[0031] A ball 6 is rotatably connected to the side wall of the fixing groove 5 .

[0032] Working principle: When the mechanism body 1 needs to convert the electric drive to the manual drive mode, the staff needs to turn off the DC motor 2 to stop the worm 3 connected to the output shaft of the DC motor 2, and the worm wheel 4 meshing with the worm 3 will no longer rotate. Then the staff needs to install the driving mechanism and the worm wheel 4 together, and fix the driving rod 7 on the worm wheel 4 through the cooperation of the connecting part on the driving rod 7 and the fixed part on the worm wheel 4. Then the staff drives the driving rod 7 and the worm wheel 4 to rotate through the driving wheel to realize the driving mechanism body 1, and it is convenient to convert the electric drive to the manual drive. The structure is simple and convenient for the staff to operate. The manual drive mode can facilitate the staff to better adjust the mechanism body 1, thereby facilitating the staff's operation and improving the staff's efficiency.

[0033] When the staff needs to install the driving rod 7 on the worm gear 4, the staff first presses the two sliding rods 8 to make the two sliding rods 8 slide on the driving rod 7 and squeeze the first spring 11 between the two sliding rods 8, and then inserts the connecting block 9 of the sliding rod 8 into the fixing groove 5 opened in the worm gear 4. After the position of the connecting block 9 and the fixing groove 5 are relatively aligned, the staff withdraws the pressing force on the sliding rod 8, so that the first spring 11 gradually extends and pushes the sliding rod 8 under the action of its own elastic recovery, and the connecting block 9 on the sliding rod 8 will be completely stuck in the fixing groove 5. When the sliding rod 8 is not subjected to external force, the connecting block 9 will not easily fall off from the fixing groove 5, thereby realizing the fixing of the driving rod 7 and the worm gear 4. Then, the staff can drive the rotation of the worm gear 4 by rotating the driving rod 7, and start and adjust the mechanism body 1. The simple structure is convenient for the staff to operate and can improve the staff's efficiency.

[0034] The sliding rod 8 is inserted into the inner groove 13 of the driving rod 7 through the fixing block 10, so that when the staff drives the sliding rod 8, the fixing block 10 can move in the inner groove 13 without causing the sliding rod 8 to separate from the driving rod 7, thereby ensuring that the sliding rod 8 is connected with the driving rod 7, and conveniently driving the sliding rod 8 to realize the disassembly and assembly of the driving rod 7. When the fixing block 10 moves in the inner groove 13, the second spring 12 arranged between the fixing block 10 and the inner wall of the inner groove 13 will limit the fixing block 10 to prevent the fixing block 10 from completely detaching from the inner groove 13, thereby ensuring that the staff can drive the sliding rod 8 more stably. When the driving force on the sliding rod 8 is withdrawn, the fixing block 10 will gradually return to its original state under the action of the elastic force of the second spring 12 itself.

[0035] Example 2: Reference Figure 3 Compared with the first embodiment, the second embodiment is different in that: the connecting part includes a magnetic block 14 arranged on the driving rod 7, and the fixing part includes an electromagnet 15 arranged on the worm gear 4. After the electromagnet 15 is energized, it is attracted to the magnetic block 14, and the width of the electromagnet 15 and the magnetic block 14 is greater than the diameter of the driving rod 7.

[0036] Working principle: the driving rod 7 can be adsorbed together with the magnetic block 14 after the electromagnet 15 is energized, so as to realize the fixing and disassembly of the driving rod 7, and the structure is simple and convenient for the staff to operate, so that the staff can rotate the driving rod 7 to drive the rotation of the worm gear 4 by fixing the driving rod 7 and the worm gear 4, which is convenient for the staff to drive and adjust.

[0037] The above is only a preferred embodiment of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A compact electric actuator, comprising a mechanism body (1), wherein the mechanism body (1) comprises a DC motor (2), a worm (3) and a worm wheel (4), wherein the DC motor (2) is used to drive the worm (3) to rotate, and the worm (3) drives the worm wheel (4) to transmit output, and wherein: The mechanism body (1) is provided with a driving mechanism for driving the worm wheel (4) to rotate, the driving mechanism comprising a driving rod (7) detachably connected to the worm wheel (4) and a driving wheel fixedly connected to the driving rod (7), the diameter of the driving wheel being larger than the diameter of the driving rod (7), the end of the driving rod (7) close to the worm wheel (4) being provided with a connecting portion, the end of the worm wheel (4) close to the driving rod (7) being provided with a fixing portion matched with the connecting portion, and the connecting portion and the fixing portion being detachably connected.

2. A compact electric actuator according to claim 1, characterized in that: The connecting portion comprises a sliding rod (8) symmetrically slidably connected to the driving rod (7), a connecting block (9) protrudingly arranged on the sliding rod (8), and a first spring (11) abutting between the two sliding rods (8); the fixing portion comprises a fixing groove (5) provided on the worm gear (4), and the fixing groove (5) is provided for the connecting block (9) to be inserted.

3. A compact electric actuator according to claim 2, characterized in that: A fixing block (10) is arranged at one end of the sliding rod (8) close to the driving rod (7), and an inner groove (13) for the fixing block (10) to be inserted into is provided on the driving rod (7).

4. A compact electric actuator according to claim 3, characterized in that: A second spring (12) is provided between the fixing block (10) and the inner wall of the inner groove (13), and the second spring (12) is used to prevent the fixing block (10) from being separated from the inner groove (13).

5. A compact electric actuator according to claim 2, characterized in that: A ball (6) is rotatably connected to the side wall of the fixing groove (5).

6. A compact electric actuator according to claim 1, characterized in that: The connecting part comprises a magnetic block (14) arranged on the driving rod (7), and the fixing part comprises an electromagnet (15) arranged on the worm gear (4). After the electromagnet (15) is energized, it is attracted to the magnetic block (14).

7. A compact electric actuator according to claim 6, characterized in that: The widths of the electromagnet (15) and the magnetic block (14) are both greater than the diameter of the driving rod (7).

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