Electric actuator with emergency switch function

Abstract

An electric actuator with an emergency switch function comprises a shell, the shell is formed by assembling a base and a cover plate, and an installation cavity is formed in the shell; the motor is configured in the mounting cavity; at least part of the output rod is configured in the mounting cavity; the speed reduction transmission mechanism is in transmission connection between the motor and the output rod; the lower end of the output rod is provided with an output end, and the upper end of the output rod is provided with an emergency switch end; an output hole is formed in the base, and the output end part of the output rod extends into the output hole; the cover plate is provided with an operation hole, and the end part of the emergency switch of the output rod passes through the operation hole and then is exposed out of the housing. The pipe fitting valve has the emergency switch function, once a motor or a speed reduction transmission mechanism breaks down, a user can directly drive the output rod to operate through the end of the emergency switch under the condition that a cover plate is not opened (namely sealant is not removed), and then the output rod can achieve the functions of opening, closing, flow adjusting and the like of the pipe fitting valve.

Description

Technical Field

[0001] This utility model relates to the technical field of electric actuators, and in particular to an electric actuator with an emergency switch function. Background Technology

[0002] An electric actuator is a drive device that provides linear or rotary motion. It utilizes some kind of driving energy and operates under the action of a control signal. The actuator uses liquid, gas, electricity, or other energy sources and converts them into driving force through a motor, cylinder, or other device. Existing electric actuator positioning methods mainly include reed positioning and microswitch positioning, which mostly only achieve simple on / off positioning control and cannot meet the needs of the current market. For example, when connecting an electric actuator to a water meter, it is necessary to adjust the water flow rate; however, the above positioning methods can only achieve on / off functions and cannot achieve intelligent adjustment functions.

[0003] Different types of valves (such as gate valves, butterfly valves, ball valves, etc.) have different requirements for electric actuators. The appropriate electric actuator needs to be selected according to parameters such as valve type, diameter, and torque.

[0004] A prior art example, referring to patent document CN213929617U, discloses a rationally arranged actuator, including an actuator housing with an inner cavity, a motor, a transmission mechanism, and an output rod arranged in the inner cavity and sequentially connected in transmission. The transmission mechanism includes a bevel gear, an input gear meshing with the bevel gear, an output gear connected to the output rod, and several stages of reduction gears connected between the input gear and the output gear. The motor is horizontally arranged, and the bevel gear is sleeved on the output rod of the motor. The input gear is a double input gear, which includes a vertically arranged bevel tooth portion and a spur tooth portion located at the upper end of the bevel tooth portion, wherein the bevel tooth portion meshes with the bevel gear for transmission. The reduction gears are all double reduction spur gears, and adjacent double reduction spur gears mesh with each other for transmission. The output gear is a single gear, and the single gear has an output hole, into which the output rod is connected. This utility model has comprehensively optimized the component composition and internal space, making the component arrangement more compact and improving the space utilization rate of the stepped inner cavity.

[0005] As shown in the above technical example, there are certain defects in its use. Based on user feedback, the main shortcomings of the product are summarized as follows: 1. The motor and gear transmission mechanism are all enclosed in the housing. Once the motor fails or the gear transmission is blocked, the output rod will not be able to rotate normally, that is, it will be impossible to control the normal opening and closing of the external valve. At this time, if emergency switching or maintenance is required, the housing (cover plate) needs to be opened, which is very troublesome for users; 2. When processing the housing, sealant is generally used to fill the gap between the cover plate and the base to ensure internal sealing. However, the existing structure requires opening the cover plate for emergency switching, that is, the sealant needs to be removed. After the operation, the cover plate needs to be closed again and sealant needs to be filled again to ensure internal sealing. However, the operation of refilling sealant is generally not feasible for ordinary users. Summary of the Invention

[0006] In order to overcome the above-mentioned shortcomings of the prior art, the present invention provides an electric actuator with an emergency switch function.

[0007] The technical solution of this utility model to solve its technical problem is: an electric actuator with an emergency switch function, comprising:

[0008] The housing is assembled from a base and a cover plate, and the housing has an installation chamber inside.

[0009] An electric motor, which provides power, is disposed in the mounting chamber;

[0010] An output rod for outputting power, said output rod being at least partially disposed in said mounting chamber;

[0011] A speed reduction transmission mechanism is disposed in the mounting chamber and is drively connected between the motor and the output rod.

[0012] The lower end of the output rod has an output end, and the upper end of the output rod has an emergency switch end;

[0013] The base is provided with an output hole, and the output end of the output rod extends into the output hole;

[0014] The cover plate has an operating hole, and the emergency switch end of the output rod protrudes to the outside of the housing through the operating hole.

[0015] Preferably, a tool slot is provided on the end of the emergency switch.

[0016] In some preferred embodiments of this utility model, the upper end surface of the cover plate is provided with a rotation angle marking area.

[0017] Specifically, the rotation angle marking area is an arc-shaped area protruding on the cover plate, and the opening direction of the tool slot can point to any position in the arc-shaped area.

[0018] In some specific embodiments of this utility model, the speed reduction transmission mechanism includes a bevel gear, an input gear meshing with the bevel gear, an output gear assembly connected to the output rod, and several stages of speed reduction gears connected between the input gear and the output gear assembly;

[0019] The motor is horizontally mounted, and the bevel gear is sleeved on the output shaft of the motor.

[0020] The input gear is a double input gear, which includes a vertically arranged bevel gear and a straight gear located at the upper end of the bevel gear, wherein the bevel gear meshes with the bevel gear for transmission.

[0021] All of the aforementioned reduction gears are double-reduction spur gears, with adjacent double-reduction spur gears meshing and transmitting power.

[0022] The output gear assembly is connected to the reduction gear and the output rod respectively for transmission.

[0023] Furthermore, the output gear assembly includes stacked single gears and a clutch-type output disc, wherein the single gear meshes with and is connected to the reduction gear for transmission.

[0024] The clutch-type output disc has a protruding transmission column, and the single gear has a transmission groove. The transmission groove is inserted into the transmission groove, and the size of the transmission groove is larger than the size of the transmission column. When the transmission column abuts against the inner wall of the transmission groove, the single gear and the clutch-type output disc form a transmission engagement. When the transmission column separates from the inner wall of the transmission groove, the single gear and the clutch-type output disc form a transmission disengagement engagement.

[0025] The single gear has a first hole, and the clutch-type output disc has a second hole. The output rod is inserted into the first hole and forms a clearance fit, and the output rod is inserted into the second hole and forms an interference fit, so that the output rod and the clutch-type output disc are connected for transmission and maintain synchronous movement.

[0026] In some preferred embodiments of this utility model, the installation chamber is further provided with a plurality of contact switches, and the single gear is provided with a position feedback post protruding from it, the position feedback post being able to touch any one of the contact switches.

[0027] In some preferred embodiments of this utility model, the housing is flat, the mounting chamber has a low chamber section and a high chamber section, the motor and input gear are disposed in the low chamber section, the contact switch, output gear assembly and output rod are disposed in the high chamber section, and the reduction gear is distributed between the low chamber section and the high chamber section.

[0028] In some preferred embodiments of this utility model, the cover plate is provided with a first wiring hole and a second wiring hole. The first wiring hole is connected to the low-position chamber section and is located near the motor. The second wiring hole is connected to the high-position chamber section and is located near the contact switch.

[0029] In some preferred embodiments of this utility model, the base is assembled with the cover plate by three fasteners, and the three fasteners are respectively arranged at the low chamber section, the high chamber section, and the junction of the low chamber section and the high chamber section.

[0030] The beneficial effects of this utility model are as follows: It has an emergency switch function. In the event of a malfunction in the motor or reduction transmission mechanism, the user can directly drive the output rod through the end of the emergency switch without opening the cover (i.e., without removing the sealant). The output rod can then perform functions such as opening and closing the pipe valve and regulating the flow rate, thus completing the emergency switch function and preventing water or gas leaks or waste. Users can then contact after-sales service personnel to troubleshoot the product, ensuring its continued normal operation. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the appearance structure of this utility model.

[0032] Figure 2 This is an exploded view of this utility model.

[0033] Figure 3 This is a schematic diagram of the internal assembly structure of this utility model.

[0034] Figure 4 This is a schematic diagram of the external structure when the emergency switch is not operated.

[0035] Figure 5 This is a schematic diagram of the internal structure when the emergency switch is not operated.

[0036] Figure 6 This is a schematic diagram of the external structure when the end of the emergency switch is operated (rotated 45°).

[0037] Figure 7 This is a schematic diagram of the internal structure when operating the end of the emergency switch (rotating 45°).

[0038] Figure 8 This is a schematic diagram of the external structure when the end of the emergency switch is operated (rotated 90°).

[0039] Figure 9 This is a schematic diagram of the internal structure when operating the end of the emergency switch (rotating 90°).

[0040] Figure 10 This is a schematic diagram of the output rod in this utility model.

[0041] Figure 11 This is a structural schematic diagram of the base in this utility model.

[0042] Figure 12 This is a schematic diagram of the cover plate in this utility model.

[0043] Figure 13 This is an assembly diagram of the output gear assembly and the output rod.

[0044] In the diagram: 1. Housing; 11. Base; 111. Output hole; 12. Cover plate; 121. Operating hole; 122. Rotation angle marking area; 123. First wiring hole; 124. Second wiring hole; 13. Installation chamber; 131. Low-position chamber section; 132. High-position chamber section; 2. Motor; 3. Output rod; 31. Output end; 32. Emergency switch end; 321. Tool slot; 4. Reduction transmission mechanism; 41. Bevel gear; 42. Input gear; 421. Bevel tooth section; 422. Straight tooth section; 43. Reduction gear; 44. Output gear assembly; 441. Single gear; 4411. Transmission groove; 4412. First hole; 4413. Position feedback column; 442. Clutch output disc; 4421. Transmission column; 4422. Second hole; 6. Contact switch; 7. Fastener. Detailed Implementation

[0045] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. It should be noted that the embodiments are merely specific descriptions of the present invention, and their purpose is to enable those skilled in the art to better understand the technical solution of the present invention, and should not be regarded as limitations on the present invention.

[0046] In the description of this utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0047] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0048] Example 1

[0049] Reference Figures 1 to 13 An electric actuator with an emergency switch function includes: a housing 1, which is assembled from a base 11 and a cover plate 12, and the housing 1 has an installation chamber 13; a motor 2, which provides power and is disposed in the installation chamber 13; an output rod 3, which outputs power and is at least partially disposed in the installation chamber 13. Preferably, the output rod 3 is fitted with several sealing rings to maintain a good sealing fit with the housing 1; and a reduction transmission mechanism 4, which is disposed in the installation chamber 13 and is drively connected between the motor 2 and the output rod 3.

[0050] It is important to emphasize that the main difference from existing technologies lies in the novel structure of the output rod 3. Specifically, the lower end of the output rod 3 has an output end 31, and the upper end of the output rod 3 has an emergency switch end 32. The base 11 has an output hole 111, and the output end 31 of the output rod 3 extends into the output hole 111. The output end 31 is used to connect to an external pipe valve, allowing the output rod 3 to open, close, and regulate the flow rate of the pipe valve through the output end 31 during movement. More importantly, the cover plate 12 has an operating hole 121, through which the emergency switch end 32 of the output rod 3 protrudes to the outside of the housing 1. (See reference...) Figures 4-9 In the event of a malfunction in motor 2 or reduction gear 4, the user can directly drive the output rod 3 via the emergency switch end 32 without opening the cover plate 12 (i.e., without removing the sealant). The output rod 3 will then be able to open, close, and regulate the flow of the pipe valve, thus fulfilling the emergency switch function and preventing water or gas leaks or waste. The user can then contact after-sales service personnel to troubleshoot the product and ensure its continued normal operation.

[0051] Preferably, the emergency switch end 32 is provided with a tool slot 321. For example, see reference... Figure 10The tool slot 321 is in the shape of a "I" and can be used with a "I" type screwdriver; it can also be in the shape of a "+" and can be used with a "+" type screwdriver.

[0052] To enable users to more intuitively and accurately control the switching angle during emergency switching, the preferred structural design is as follows: (Refer to...) Figure 4 , Figure 6 , Figure 8 The upper surface of the cover plate 12 is provided with a rotation angle marking area 122. Specifically, the rotation angle marking area 122 is an arc-shaped area protruding on the cover plate 12, and the opening direction of the tool slot 321 can point to any position of the arc-shaped area. This can be understood as the tool slot 321 being regarded as the "hand" of a clock, and the arc-shaped area being regarded as the "dial" of the clock, so that the user can determine the current position of the output rod 3 based on the relative positional relationship between the tool slot 321 and the arc-shaped area.

[0053] Example 2

[0054] Based on the structure of Embodiment 1, this embodiment provides preferred structural schemes for each mechanism, specifically as follows:

[0055] 1. The aforementioned speed reduction transmission mechanism 4: (Refer to...) Figures 2-3 The system includes a bevel gear 41, an input gear 42 meshing with the bevel gear 41, an output gear assembly 44 connected to the output rod 3, and several stages of reduction gears 43 connected between the input gear 42 and the output gear assembly 44. The motor 2 is horizontally arranged, and the bevel gear 41 is sleeved on the output shaft of the motor 2. The input gear 42 is a double input gear 42, which includes a vertically arranged bevel tooth portion 421 and a spur tooth portion 422 located at the upper end of the bevel tooth portion 421, wherein the bevel tooth portion 421 meshes with the bevel gear 41 for transmission. The reduction gears 43 are all double reduction spur gears, and adjacent double reduction spur gears mesh with each other for transmission. The output gear assembly 44 forms a transmission connection with the reduction gears 43 and the output rod 3 respectively.

[0056] Conventional gear transmission mechanisms are arranged in an overlapping manner. For example, Chinese patent application number 201620495637.7 discloses a low-voltage actuator for actuating vertical valves, where the internal components are arranged irregularly, resulting in poor utilization of internal space and a large overall size. To address these shortcomings, preferably, the input gear 42, several stages of reduction gears 43, and output gear are arranged in a spiral ascending pattern. This arrangement makes full use of vertical space, allowing for a more compact installation of each gear and occupying less installation space. Consequently, the overall size of the housing 1 can be reduced, enabling installation and use in more confined spaces.

[0057] II. Reference Figures 2-9 , Figure 13 The output gear assembly 44 includes stacked single gears 441 and a clutch-type output disc 442. The single gears 441 mesh with and are connected to the reduction gear 43. A transmission post 4421 protrudes from the clutch-type output disc 442. A transmission groove 4411 is formed on the single gears 441. The transmission groove 4411 is inserted into the single gears 4421. The size of the transmission groove 4411 is larger than the size of the transmission post 4421. When the transmission post 4421 abuts against the inner wall of the transmission groove 4411, the single gears 441 and the clutch-type output disc... 442 forms a transmission engagement; when the transmission column 4421 separates from the inner wall of the transmission groove 4411, the single gear 441 and the clutch output disc 442 form a transmission disengagement engagement; the single gear 441 has a first hole 4412, the clutch output disc 442 has a second hole 4422, the output rod 3 passes into the first hole 4412 and forms a clearance fit, the output rod 3 passes into the second hole 4422 and forms an interference fit, so that the output rod 3 and the clutch output disc 442 are connected in transmission and maintain synchronous movement.

[0058] When the output rod 3 is controlled by the tool slot 321, the transmission column 4421 separates from the inner wall of the transmission slot 4411 during operation. Therefore, the single gear 441 will not cause resistance to the clutch output disc 442, so that when the emergency switch is operated, the output rod 3 and the clutch output disc 442 move independently relative to the single gear 441, thereby making it easier to open or close the pipe valve through the output rod 3.

[0059] III. Reference Figure 3 The installation chamber 13 is further equipped with several contact switches 6, and the single gear 441 has a protruding position feedback post 4413, which can contact any one of the contact switches 6. Preferably, there are two contact switches 6 arranged at 180-degree intervals. When one contact switch 6 contacts the position feedback post 4413, it means that the output rod 3 has reached the maximum open position (the pipe valve is fully open), and when the other contact switch 6 contacts the position feedback post 4413, it means that the output rod 3 has reached the maximum closed position (the pipe valve is fully closed).

[0060] IV. Reference Figure 3 , Figure 11Preferably, the housing 1 is flat, and the mounting chamber 13 has a low-level chamber section 131 and a high-level chamber section 132. The motor 2 and input gear 42 are disposed in the low-level chamber section 131, while the contact switch 6, output gear assembly 44, and output rod 3 are disposed in the high-level chamber section 132. The reduction gear 43 is distributed between the low-level chamber section 131 and the high-level chamber section 132. The low-level chamber section 131 and the high-level chamber section 132 form a stepped mounting chamber 13. The rational spatial division of the various components greatly improves the space utilization of the mounting chamber 13, effectively reducing internal space waste. This results in a more compact overall size of the actuator, allowing it to be installed in smaller spaces and adapting to more demanding installation environments.

[0061] Conventionally, the actuator housing 1 only has one wiring hole. However, when there are multiple electrical components inside, some of these components are too far from the wiring hole, requiring longer cables, which is inconvenient. To eliminate these wiring defects, the present invention adopts the following method: (Refer to...) Figure 1 , Figure 12 The cover plate 12 has a first wiring hole 123 and a second wiring hole 124. The first wiring hole 123 communicates with the lower chamber section 131 and is located near the motor 2. The second wiring hole 124 communicates with the upper chamber section 132 and is located near the contact switch 6. By setting multiple wiring holes (first wiring hole 123 and second wiring hole 124), each electrical component (such as the motor 2, contact switch 6, etc.) can automatically achieve its wiring function through the nearest wiring hole.

[0062] V. Regarding the connection structure between the cover plate 12 and the base 11, the preferred configuration is as follows: (Refer to...) Figure 1 The base 11 is assembled with the cover plate 12 using three fasteners 7 (screws or similar materials are acceptable, no special limitation is made). The three fasteners 7 are respectively positioned at the lower chamber section 131, the upper chamber section 132, and the junction of the lower chamber section 131 and the upper chamber section 132. The partitioning of the three fasteners 7 is more reasonable, forming an approximately equilateral triangle distribution, which makes the force more balanced, the connection stability better, and the overall strength of the assembled shell 1 higher.

[0063] It is worth noting that the other technical solutions of this utility model are all existing technologies, and therefore will not be described in detail.

[0064] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the concept of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. An electric actuator with an emergency switch function, comprising: The housing (1) is assembled from a base (11) and a cover plate (12), and the housing (1) is provided with an installation chamber (13); An electric motor (2) for providing power is disposed in the mounting chamber (13); An output rod (3) for outputting power is at least partially disposed in the mounting chamber (13); A speed reduction transmission mechanism (4) is disposed in the mounting chamber (13) and the speed reduction transmission mechanism (4) is drively connected between the motor (2) and the output rod (3); Its features are: The lower end of the output rod (3) has an output end (31), and the upper end of the output rod (3) has an emergency switch end (32); The base (11) is provided with an output hole (111), and the output end (31) of the output rod (3) extends into the output hole (111); The cover plate (12) is provided with an operation hole (121), and the emergency switch end (32) of the output rod (3) is exposed to the outside of the housing (1) after passing through the operation hole (121).

2. The electric actuator with emergency switch function according to claim 1, characterized in that: The emergency switch end (32) is provided with a tool slot (321).

3. The electric actuator with emergency switch function according to claim 2, characterized in that: The upper surface of the cover plate (12) is provided with a rotation angle marking area (122).

4. The electric actuator with emergency switch function according to claim 3, characterized in that: The rotation angle marking area (122) is an arc-shaped area protruding on the cover plate (12), and the opening direction of the tool groove (321) can point to any position of the arc-shaped area.

5. The electric actuator with emergency switch function according to claim 1, characterized in that: The speed reduction transmission mechanism (4) includes a bevel gear (41), an input gear (42) meshing with the bevel gear (41), an output gear assembly (44) connected to the output rod (3), and several stages of speed reduction gears (43) connected between the input gear (42) and the output gear assembly (44); The motor (2) is horizontally arranged, and the bevel gear (41) is sleeved on the output shaft of the motor (2); The input gear (42) is a double input gear (42), which includes a vertically arranged bevel tooth part (421) and a straight tooth part (422) located at the upper end of the bevel tooth part (421), wherein the bevel tooth part (421) meshes with the bevel gear (41) for transmission. The reduction gears (43) mentioned above are all double reduction spur gears, and adjacent double reduction spur gears mesh with each other for transmission; The output gear assembly (44) is connected to the reduction gear (43) and the output rod (3) respectively.

6. The electric actuator with emergency switch function according to claim 5, characterized in that: The output gear assembly (44) includes stacked single gears (441) and clutch-type output discs (442), wherein the single gears (441) mesh with and are connected to the reduction gears (43). The clutch-type output disc (442) has a protruding transmission column (4421), and the single gear (441) has a transmission groove (4411). The transmission groove (4411) is inserted into the transmission groove (4411), and the size of the transmission groove (4411) is larger than the size of the transmission column (4421). When the transmission column (4421) abuts against the inner wall of the transmission groove (4411), the single gear (441) and the clutch-type output disc (442) form a transmission engagement. When the transmission column (4421) separates from the inner wall of the transmission groove (4411), the single gear (441) and the clutch-type output disc (442) form a transmission disengagement engagement. The single gear (441) has a first hole (4412), and the clutch-type output disc (442) has a second hole (4422). The output rod (3) is inserted into the first hole (4412) and forms a clearance fit, and the output rod (3) is inserted into the second hole (4422) and forms an interference fit, so that the output rod (3) and the clutch-type output disc (442) are connected in transmission and maintain synchronous movement.

7. The electric actuator with emergency switch function according to claim 6, characterized in that: The installation chamber (13) is also provided with several contact switches (6), and the single gear (441) is provided with a position feedback post (4413), which can touch any one of the contact switches (6).

8. The electric actuator with emergency switch function according to claim 7, characterized in that: The housing (1) is flat, the mounting chamber (13) has a low chamber section (131) and a high chamber section (132), the motor (2) and the input gear (42) are located in the low chamber section (131), the contact switch (6), the output gear assembly (44) and the output rod (3) are all located in the high chamber section (132), and the reduction gear (43) is distributed between the low chamber section (131) and the high chamber section (132).

9. The electric actuator with emergency switch function according to claim 8, characterized in that: The cover plate (12) is provided with a first wiring hole (123) and a second wiring hole (124). The first wiring hole (123) is connected to the low-position chamber section (131) and is located near the motor (2). The second wiring hole (124) is connected to the high-position chamber section (132) and is located near the contact switch (6).

10. The electric actuator with emergency switch function according to claim 8, characterized in that: The base (11) is assembled with the cover plate (12) by three fasteners (7). The three fasteners (7) are respectively located at the low chamber section (131), the high chamber section (132), and the junction of the low chamber section (131) and the high chamber section (132).

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