Micro electric actuator

Abstract

The utility model relates to a micro electric actuator which comprises a shell and a bottom plate, a mounting seat is arranged on the bottom plate, a sliding groove is formed in the mounting seat, a screw hole seat is arranged in the sliding groove in a sliding mode, a pushing seat is integrally formed on the lower side of the screw hole seat, a driving opening penetrating through the mounting seat downwards is formed in the lower side of the sliding groove, and the pushing seat corresponds to the driving opening. A motor is fixedly installed on the installation base, a threaded rotating base used for being in threaded fit with the threaded hole base is arranged on the motor, and the design that the motor and the threaded rotating base are combined is adopted, so that the actuator can rapidly respond to control signals, rapid opening and closing actions of a valve are achieved, and the overall response speed of a system is increased. The precise matching between the threaded rotating seat and the screw hole seat ensures that the actuator has high position precision in the driving process, the opening degree of the valve can be accurately controlled, good working performance can be kept in an extreme environment, and in addition, the whole structure of the actuator is compact in arrangement, and the occupied space is small.

Description

Technical Field

[0001] The utility model relates to the technical field of actuators, in particular to a micro electric actuator. Background Art

[0002] In floor heating systems, electric actuators typically control the opening and closing of stop valves on pipelines. Existing electric actuators of this type, such as those in patent applications CN202122401138.0, CN202020040047.1, and CN202122402779.8, typically rely on the working principle of a wax core and a spring. These actuators contain a wax core. When current passes through the heating element, the wax expands due to the heat, pushing a piston or other mechanical component, which in turn moves the valve stem, opening the valve. The valve is closed by its own spring return. However, this design has inherent limitations.

[0003] First, because the paraffin core needs to be heated to work, its response speed is relatively slow, usually taking tens of seconds or even minutes to complete a complete opening and closing action. This is not ideal for applications that require fast response.

[0004] Secondly, the operating temperature range of paraffin cores is limited, and extreme environments (such as excessive cooling or heating, or excessive water flow and pressure) may lead to performance degradation or failure. Furthermore, the service life of paraffin cores is also limited, as repeated heating and cooling cycles cause material fatigue, affecting long-term reliability and accuracy. Finally, due to the design of the paraffin core, traditional electrothermal actuators are generally large.

[0005] In response to the above technical problems, this application makes improvements. Utility Model Content

[0006] The utility model provides a micro electric actuator, which solves the above problems existing in the use process of the prior art.

[0007] The technical solution of the present utility model is achieved as follows: a micro-electric actuator includes a shell, a mounting cavity with an opening facing downward, a bottom plate covered on the lower side of the shell, a mounting seat provided on the bottom plate, a sliding groove provided on the mounting seat, a screw hole seat slidingly provided in the sliding groove, a push seat integrally formed on the lower side of the screw hole seat, a driving port extending downward through the mounting seat provided on the lower side of the sliding groove, the push seat corresponding to the driving port, a motor fixedly mounted on the mounting seat, and a threaded rotating seat provided on the motor for threaded engagement with the screw hole seat.

[0008] Preferably, the screw hole seat is provided with a threaded opening with the opening facing upwards, the threaded rotating seat is fixed on the output shaft of the motor, and the threaded rotating seat is provided with an external thread for threadably fitting in the threaded opening.

[0009] Preferably, the sliding groove is in the shape of a hexagonal hole, and the outer wall profile of the screw hole seat is in the shape of a hexagonal column that matches the sliding groove, and the screw hole seat can only slide up and down in the sliding groove.

[0010] Preferably, the mounting seat is provided with a motor mounting opening with an opening facing upward on the upper side of the sliding groove, and the motor is located on the motor mounting opening and fixed to the mounting seat.

[0011] Preferably, a valve body mounting sleeve is integrally formed on the lower side of the base plate, the valve body mounting sleeve is arranged in a ring shape with the driving port as the center, and a valve body fixing piece is provided on the valve body mounting sleeve.

[0012] Preferably, the valve body fixing part includes a fixing ring, a movable opening is radially opened on the valve body mounting sleeve, the fixing ring is movably fitted on the movable opening, and one side of the fixing ring is provided with an elastic part for supporting the valve body mounting sleeve.

[0013] Preferably, the elastic member includes an elastic plate integrally formed on one side of the fixed ring, and the valve body mounting sleeve is integrally formed with a supporting seat on one side of the movable port, and the elastic plate corresponds to the supporting seat.

[0014] Preferably, the fixing ring is provided with an easy-control plate on the same side as the elastic member, and the fixing ring is also integrally formed with a supporting protrusion on the side surface located in the movable port for supporting in the valve body mounting sleeve.

[0015] Preferably, a control circuit board and a pluggable crystal connector are further provided on the bottom plate, and two pluggable crystal connectors are provided.

[0016] In summary, the beneficial effects of the present invention are:

[0017] 1. The present invention uses a motor to drive the threaded rotating seat to rotate, thereby driving the screw hole seat to slide upward or downward in the sliding groove. When the screw hole seat moves downward, the push seat passes downward from the drive port, thereby pushing the valve stem of the stop valve installed on the lower side of the present invention. When the screw hole seat moves upward, the push seat retracts into the drive port, and the valve stem of the stop valve automatically resets upward. The present invention adopts a design that combines a motor with a threaded rotating seat, so that the actuator can quickly respond to control signals, realize rapid valve opening and closing, and improve the overall response speed of the system. The precise coordination between the threaded rotating seat and the screw hole seat ensures that the actuator has high position accuracy during the driving process, can accurately control the opening degree of the valve, and can maintain good working performance even in extreme environments. In addition, the overall structure of the present invention is compact and occupies little space.

[0018] 2. The valve body mounting sleeve and valve body fixing design on the base plate make the connection between the actuator and external equipment more convenient and quick.

[0019] 3. The plug-in crystal connector simplifies the electrical connection process, and the design of two plug-in crystal connectors facilitates the serial connection of multiple devices of the present invention to the same junction box. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0021] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0022] Figure 2 for Figure 1 Schematic diagram of the structure when observed from another angle;

[0023] Figure 3 It is a top view of the utility model;

[0024] Figure 4 for Figure 3 Schematic diagram of the cross-section structure in the AA direction;

[0025] Figure 5 This is a schematic diagram of the structure of the shell exploding upward in the present invention;

[0026] Figure 6 This is a schematic diagram of the structure of the utility model with the housing removed and the motor and the threaded rotating seat exploded upwards;

[0027] Figure 7 This is a schematic diagram of the structure of the utility model in which the motor and the threaded rotating seat are removed and the screw hole seat is exploded upward;

[0028] Figure 8 This is a schematic diagram of the structure of the fixed ring being exploded in the present invention;

[0029] Figure 9 for Figure 8 Schematic diagram of the structure when observed from another angle.

[0030] In the figure: 1. Shell; 11. Mounting cavity; 2. Bottom plate; 21. Mounting seat; 211. Sliding groove; 212. Drive port; 213. Motor mounting port; 22. Valve body mounting sleeve; 221. Movable port; 222. Support seat; 3. Screw hole seat; 31. Push seat; 32. Threaded port; 4. Motor; 5. Threaded rotating seat; 51. External thread; 6. Fixing ring; 61. Elastic plate; 62. Easy-control board; 63. Support protrusion; 7. Control circuit board; 8. Plug-in crystal connector. DETAILED DESCRIPTION

[0031] The following is a combination of the appended examples of the present invention Figure 1-9 , clearly and completely describes the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0032] Example:

[0033] like Figures 1 to 9 As shown, the utility model discloses a micro-electric actuator, including a shell 1, which has a mounting cavity 11 with an opening facing downward, and a bottom plate 2 is detachably covered on the lower side of the shell 1, a mounting seat 21 is provided on the bottom plate 2, and a sliding groove 211 is provided on the mounting seat 21, a screw hole seat 3 is slidingly provided in the sliding groove 211, a pushing seat 31 is integrally formed on the lower side of the screw hole seat 3, and a driving port 212 is provided on the lower side of the sliding groove 211, which passes through the mounting seat 21 downward, wherein the pushing seat 31 corresponds to the driving port 212, and in addition, a motor 4 is fixedly installed on the mounting seat 21, and the motor 4 is provided with a threaded rotating seat 5 for threadedly mating with the screw hole seat 3.

[0034] The outer wall of the screw hole seat 3 is in the shape of a hexagonal hole, and the outer wall of the screw hole seat 3 is in the shape of a hexagonal column that matches the sliding groove 211. The screw hole seat 3 can only slide up and down in the sliding groove 211. Therefore, when the screw hole seat 5 is driven by the motor 4 to rotate, the screw hole seat 3 cannot be driven to rotate, so it can only slide up and down under the action of the thread cooperation between the screw hole seat 5 and the screw hole seat 3. During operation, when the screw hole seat 3 moves downward, the pushing seat 31 passes downward from the driving port 212, thereby pushing the valve stem of the shut-off valve installed on the lower side of the utility model. When the screw hole seat 3 moves upward, the pushing seat 31 retracts the driving port 212, and the valve stem of the shut-off valve automatically resets upward. This utility model utilizes a design that combines a motor 4 with a threaded rotary seat 5, enabling the actuator to quickly respond to control signals, enabling rapid valve opening and closing, and improving the overall system response speed. The precise fit between the threaded rotary seat 5 and the screw hole seat 3 ensures high positioning accuracy during the actuator's actuation process, accurately controlling the valve's opening degree and maintaining good performance even in extreme environments. Furthermore, the utility model features a compact overall structure, requiring minimal space.

[0035] In the present invention, the mounting seat 21 is provided with a motor mounting opening 213 opening upward on the upper side of the sliding groove 211 . The motor 4 is located on the motor mounting opening 213 and fixed to the mounting seat 21 , and is fixed firmly and reliably.

[0036] In order to facilitate the installation of the present invention and the valve body, a valve body mounting sleeve 22 is integrally formed on the lower side of the base plate 2. The valve body mounting sleeve 22 is arranged in a ring shape with the drive port 212 as the center, and is used for the upper side of the valve body to be mounted therein. Then, a valve body fixing part is provided on the valve body mounting sleeve 22.

[0037] Specifically, the valve body fixing part includes a fixing ring 6, and a movable opening 221 is radially opened on the valve body mounting sleeve 22. The fixing ring 6 is movably fitted on the movable opening 221. One side of the fixing ring 6 is provided with an elastic member for supporting the valve body mounting sleeve 22. During installation, the upper side of the valve body is located in the valve body mounting sleeve 22 and in the fixing ring 6. The fixing ring 6 presses the valve body into the valve body mounting sleeve 22 through the action of the elastic member.

[0038] More specifically, the elastic member includes an elastic plate 61 integrally formed on one side of the retaining ring 6, while the valve body mounting sleeve 22 is integrally formed with a support seat 222 on one side of the movable opening 221. The elastic plate 61 corresponds to the support seat 222 and has a certain elastic deformation capability. Furthermore, the retaining ring 6 is provided with an easy-control plate 62 on the same side of the elastic member as the retaining ring 6. The retaining ring 6 is also integrally formed with a support protrusion 63 on the side located within the movable opening 221 for supporting the valve body mounting sleeve 22. The provision of the support protrusion 63 prevents the retaining ring 6 from shaking within the movable opening 221 of the valve body mounting sleeve 22. During installation, the easy-control plate 62 is first pressed manually, and then the upper side of the valve body is installed into the valve body mounting sleeve 22 and positioned within the retaining ring 6. The easy-control plate 62 is then released. The action of the elastic plate 61 pushes the retaining ring 6, causing it to press the valve body tightly into the valve body mounting sleeve 22.

[0039] In the present invention, a control circuit board 7 and a plug-in crystal connector 8 are also provided on the base plate 2. There are two plug-in crystal connectors 8. The control circuit board 7 is used to receive signals to control the motor 4 to work, and the plug-in crystal connector 8 is used to make electrical connections. The design of the two plug-in crystal connectors 8 facilitates the connection of multiple utility models in series to the same junction box. The function of controlling the work of the motor 4 by the control circuit board 7 in the present invention is supported by a large number of mature technologies. The essence of the present invention is to optimize the combination of existing hardware and its connection method for specific application scenarios to adapt to the control of the valve stem, and does not involve improvements to the internal software of the hardware.

[0040] It should also be pointed out that the terms indicated in the present invention, such as: "front", "rear", "vertical", "horizontal", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, which is 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. Therefore, it cannot be understood as limiting the scope of protection of the present invention.

[0041] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A micro-electric actuator, comprising a housing, characterized in that: The shell has a mounting cavity with an opening facing downward, the lower side of the shell is covered with a bottom plate, a mounting seat is provided on the bottom plate, a sliding groove is provided on the mounting seat, a screw hole seat is slidingly provided in the sliding groove, a pushing seat is integrally formed on the lower side of the screw hole seat, a driving port that passes through the mounting seat downward is provided on the lower side of the sliding groove, the pushing seat corresponds to the driving port, a motor is fixedly installed on the mounting seat, and a threaded rotating seat is provided on the motor for threaded cooperation with the screw hole seat.

2. The micro-electric actuator according to claim 1, characterized in that: The screw hole seat is provided with a threaded opening facing upwards, the threaded rotating seat is fixed on the output shaft of the motor, and the threaded rotating seat is provided with an external thread for threadably fitting in the threaded opening.

3. The micro-electric actuator according to claim 2, characterized in that: The sliding groove is in the shape of a hexagonal hole, and the outer wall profile of the screw hole seat is in the shape of a hexagonal column that matches the sliding groove. The screw hole seat can only slide up and down in the sliding groove.

4. The micro-electric actuator according to claim 1, characterized in that: The mounting seat is provided with a motor mounting opening on the upper side of the sliding groove, the motor being located on the motor mounting opening and fixed to the mounting seat.

5. The micro-electric actuator according to claim 1, characterized in that: A valve body mounting sleeve is integrally formed on the lower side of the bottom plate. The valve body mounting sleeve is arranged in a ring shape with the driving port as the center. A valve body fixing piece is provided on the valve body mounting sleeve.

6. The micro-electric actuator according to claim 5, characterized in that: The valve body fixing part includes a fixing ring. A movable opening is radially opened on the valve body mounting sleeve. The fixing ring is movably fitted on the movable opening. One side of the fixing ring is provided with an elastic part for supporting the valve body mounting sleeve.

7. The micro-electric actuator according to claim 6, characterized in that: The elastic member includes an elastic plate integrally formed on one side of the fixed ring, and the valve body mounting sleeve is integrally formed with a supporting seat on one side of the movable port, and the elastic plate corresponds to the supporting seat.

8. The micro-electric actuator according to claim 6, characterized in that: The fixing ring is provided with an easy-control plate on the same side as the elastic member, and the fixing ring is also integrally formed with a supporting protrusion on the side surface located in the movable port for supporting in the valve body mounting sleeve.

9. The micro-electric actuator according to claim 1, characterized in that: The bottom plate is also provided with a control circuit board and a plug-in type crystal connector, and two plug-in type crystal connectors are provided.

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