A compact electric actuator

Abstract

This invention relates to the field of electric actuator technology and discloses a compact electric actuator, including a support platform. A rail is fixedly connected to the upper surface of the support platform. A motor is fixedly connected to one side of the support platform, and a threaded rod is connected to the output end of the motor. A sliding block is slidably connected to the outside of the rail, and a support plate is fixedly connected to the upper surface of the sliding block. A baffle is installed on the other side of the support platform. A connecting module is installed between the support platform and the baffle. A component slot is opened inside the support platform, and a snap-fit ​​component for fixing the connecting module is installed inside the connecting module. By coaxially arranging the threaded rod inside the rotor of the motor and allowing the threaded rod to pass through the center of the rotor and engage with the nut structure inside the motor through threaded transmission, the drive mechanism and the motor are integrated into a single layout, reducing the number of connecting parts between the traditional motor and transmission mechanism, thereby effectively reducing the overall size of the device and improving the space utilization rate of the equipment.

Description

Technical Field

[0001] This invention relates to the field of electric actuator technology, specifically to a compact electric actuator. Background Technology

[0002] An electric actuator is a drive device that converts the rotary motion of a motor into linear motion or push-pull motion. It is widely used in automation equipment, precision machinery, smart home appliances, and industrial control systems. These devices typically use a motor to drive a lead screw or threaded rod, causing the actuator to produce stable linear displacement, thereby controlling the position, thrust, or motion state of the mechanism. Therefore, electric actuators play a crucial role in devices requiring precise linear drive.

[0003] Existing electric actuators typically employ a separate motor and lead screw structure. The motor is connected to the lead screw via a coupling or transmission connector, and the motor output drives the lead screw to rotate, thereby driving a slider or nut mechanism that meshes with the lead screw to produce linear motion. In this structure, the motor body, coupling, and lead screw are usually arranged sequentially along the axial direction, resulting in a relatively long overall actuator. Furthermore, additional connecting components are required between the motor and the transmission mechanism to achieve power transmission. While this structure can achieve basic linear drive functionality, the separate arrangement of the motor and transmission mechanism leads to a relatively dispersed overall structure, a large number of components, and a significant space requirement.

[0004] However, the inventors of this application discovered in the process of implementing the technical solution of this application that the above structure has at least the following technical problems: because the motor and the lead screw transmission mechanism adopt a separate connection structure, the overall axial dimension of the electric actuator is large and the structural integration is low. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a compact electric actuator that solves the problem of large overall axial dimensions of the electric actuator caused by the separate connection structure of the motor and the lead screw transmission mechanism in existing technologies.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a compact electric actuator, comprising a support platform, a track fixedly connected to the upper surface of the support platform, a motor fixedly connected to one side of the support platform, a threaded rod connected to the output end of the motor, a sliding block slidably connected to the outside of the track, a support plate fixedly connected to the upper surface of the sliding block, a baffle installed on the other side of the support platform, a connecting module installed between the support platform and the baffle, a component slot being provided inside the support platform, and a snap-fit ​​component for fixing the connecting module being installed inside the connecting module.

[0007] Preferably, the threaded rod is coaxially disposed inside the rotor of the motor, the threaded rod passes through the center of the rotor and engages with the nut thread inside the motor, and the stator of the motor is configured as an annular coreless coil and sleeved on the outside of the rotor.

[0008] Preferably, the component slot includes a mounting slot, which is formed inside the support platform. The support platform also has a slot, and the mounting slot and the slot are adjacent to each other.

[0009] Preferably, the buckle assembly includes a mounting post, one side of which is installed inside the connecting module. A fixing post is fixedly connected inside the mounting post, and a semi-circular plate is rotatably connected to the outside of the fixing post. A spring is provided between the semi-circular plate and the mounting post, and a locking tooth is fixedly connected to one side of the spring.

[0010] Preferably, a sliding rod is rotatably connected to one side of the semicircular plate, and the outside of the sliding rod is slidably connected to the inside of the connecting module. A pressing block is fixedly connected to one side of the sliding rod, and a second spring is installed on the other side of the sliding rod. A washer is installed at the bottom end of the second spring, and the outside of the washer is installed inside the connecting module.

[0011] Preferably, the threaded rod has multiple heat dissipation holes inside.

[0012] Preferably, a threaded head is fixedly connected to one side of the threaded rod, and a threaded groove is formed inside the other side of the threaded rod.

[0013] Preferably, a heat-conducting copper tube is fixedly connected inside the threaded rod.

[0014] This invention provides a compact electric actuator. It has the following advantages: 1. This invention integrates the drive mechanism and the motor by coaxially placing the threaded rod inside the rotor of the motor and threading the threaded rod through the center of the rotor and the nut structure inside the motor. This reduces the number of connecting parts between the traditional motor and the transmission mechanism, thereby effectively reducing the overall size of the device, making the electric actuator structure more compact, and improving the space utilization of the equipment.

[0015] 2. This invention sets component slots inside the support platform and sets buckle components inside the connecting module, so that the connecting module can be positioned in the mounting slot and fixed by the buckle teeth and the buckle slot. At the same time, the pressing block and the sliding rod cooperate to achieve quick release, so that the connecting module can be quickly installed and disassembled, improving the installation efficiency and splicing convenience of the device.

[0016] 3. This invention sets multiple heat dissipation holes inside the threaded rod and forms a heat-conducting and heat-dissipating structure with a heat-conducting copper pipe, so that the heat generated by the threaded rod during motor drive can be conducted and dissipated in a timely manner, thereby reducing the working temperature of the threaded rod and improving the stability and reliability of the device during long-term operation. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a partial structural diagram of the connection module of the present invention; Figure 3 This is a partial structural diagram of the threaded rod of the present invention; Figure 4 This is a partial structural diagram of the component slot of the present invention; Figure 5 This is a partial structural diagram of the card slot of the present invention; Figure 6 This is a partial structural diagram of the snap-fit ​​assembly of the present invention; Figure 7 This is a partial structural diagram of the heat dissipation holes of the present invention; Figure 8 This is a partial structural diagram of the heat-conducting copper tube of the present invention.

[0018] The components are as follows: 1. Support platform; 2. Track; 3. Motor; 4. Threaded rod; 5. Sliding block; 6. Support plate; 7. Baffle; 8. Connecting module; 9. Component slot; 91. Mounting slot; 92. Slot; 10. Snap-fit ​​assembly; 101. Mounting column; 102. Fixing column; 103. Semicircular plate; 104. Spring 1; 105. Clamping tooth; 106. Sliding rod; 107. Pressing block; 108. Spring 2; 109. Gasket; 11. Heat dissipation hole; 12. Threaded head; 13. Threaded groove; 14. Heat-conducting copper pipe; 15. Nut. Detailed Implementation

[0019] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Please see the appendix Figure 1 -Appendix Figure 5This invention provides a compact electric actuator, including a support platform 1, a rail 2 fixedly connected to the upper surface of the support platform 1, a motor 3 fixedly connected to one side of the support platform 1, a threaded rod 4 connected to the output end of the motor 3, a sliding block 5 slidably connected to the outside of the rail 2, a support plate 6 fixedly connected to the upper surface of the sliding block 5, a baffle 7 installed on the other side of the support platform 1, a connecting module 8 installed between the support platform 1 and the baffle 7, a component slot 9 opened inside the support platform 1, and a snap-fit ​​component 10 for fixing the connecting module 8 installed inside the connecting module 8.

[0021] Specifically, when the device is in use, the support platform 1 is used to support and install the entire electric actuator. After the motor 3 is started, it drives the threaded rod 4 to rotate through the output end. When the threaded rod 4 rotates, it forms a threaded transmission relationship with the sliding block 5, thereby driving the sliding block 5 to move linearly along the extension direction of the track 2. When the sliding block 5 moves, it drives the support plate 6 fixedly connected above it to move synchronously, thereby realizing the linear pushing or pulling action of the actuator on the external components, enabling the device to complete linear drive work. Meanwhile, baffle 7 is set on one side of support platform 1 to limit the sliding block 5 when it moves to the limit position, so as to prevent the sliding structure from leaving the track 2 and affecting the stability of equipment operation.

[0022] When installing the connection module 8, the connection module 8 can be placed in the component slot 9 opened inside the support platform 1 and quickly fixed by the snap-fit ​​component 10. The snap-fit ​​component 10 forms a snap-fit ​​with the corresponding structure in the component slot 9, so that the connection module 8 can be installed on the support platform 1. When it is necessary to disassemble or replace the connection module 8, the disassembly operation can be completed by releasing the snap-fit ​​component 10, making the installation and maintenance of the connection module 8 more convenient, thereby improving the overall flexibility of use and maintenance efficiency of the device.

[0023] Please see the appendix Figure 3 The threaded rod 4 is coaxially disposed inside the rotor of the motor 3. The threaded rod 4 passes through the center of the rotor and is threadedly engaged with the nut 15 inside the motor 3. The stator of the motor 3 is configured as an annular coreless coil and is sleeved on the outside of the rotor.

[0024] Specifically, during the operation of the device, after the motor 3 is powered on, it drives the rotor to rotate. Since the threaded rod 4 is coaxially set inside the rotor of the motor 3, when the rotor rotates, it can drive the threaded rod 4, which is engaged with its thread, to generate relative motion, thereby converting the rotational power of the motor 3 into linear driving force, so that the threaded rod 4 can complete compact transmission within the structural space. Meanwhile, the threaded rod 4 is arranged through the center of the rotor of the motor 3, so that the drive structure and the motor 3 form an integrated coaxial structure layout, reducing the connecting parts between the traditional motor and the lead screw, thereby reducing the overall size of the device and improving the compactness of the actuator structure. In addition, the stator of the motor 3 adopts a ring-shaped coreless coil structure and is set on the outside of the rotor, which can reduce hysteresis loss and core loss during the operation of the motor 3, improve the motor operating efficiency, and reduce vibration and noise during operation. This electric actuator can be used in equipment environments with limited installation space.

[0025] Please see the appendix Figure 5 and attached Figure 6 The component slot 9 includes a mounting slot 91, which is located inside the support platform 1. The support platform 1 also has a slot 92, and the mounting slot 91 and the slot 92 are adjacent to each other.

[0026] Specifically, when installing the connecting module 8, the connecting module 8 can be inserted into the mounting slot 91 opened inside the support platform 1, so that the connecting module 8 forms a stable positioning support structure in the mounting slot 91. At the same time, the mounting slot 91 can guide the connecting module 8, so that the connecting module 8 can enter the component slot 9 in a fixed direction during the installation process. When the connecting module 8 is fully inserted into the mounting slot 91, the snap-fit ​​structure in the snap-fit ​​assembly 10 can engage with the snap-fit ​​slot 92 inside the support platform 1, thereby fixing the connecting module 8 on the support platform 1 and preventing the connecting module 8 from loosening or shifting during equipment operation. When the connecting module 8 needs to be disassembled for maintenance or replacement, the connecting module 8 can be removed from the mounting slot 91 by releasing the snap-fit ​​assembly 10 from the slot 92. This allows for quick installation and disassembly of the connecting module 8, thereby improving the convenience of equipment maintenance and replacement. Furthermore, the adjacent arrangement of the mounting slot 91 and the slot 92 allows for installation positioning and snap-fit ​​fixing to be completed in the same area, reducing the space occupied by the structure and improving the compactness and stability of the overall device structure.

[0027] Please see the appendix Figure 5 and attached Figure 6The snap-fit ​​assembly 10 includes a mounting post 101. One side of the mounting post 101 is installed inside the connecting module 8. A fixing post 102 is fixedly connected inside the mounting post 101. A semi-circular plate 103 is rotatably connected to the outside of the fixing post 102. A spring 104 is provided between the semi-circular plate 103 and the mounting post 101. A locking tooth 105 is fixedly connected to one side of the spring 104. A sliding rod 106 is rotatably connected inside one side of the semi-circular plate 103. The outside of the sliding rod 106 is slidably connected inside the connecting module 8. A pressing block 107 is fixedly connected to one side of the sliding rod 106. A second spring 108 is installed on the other side of the sliding rod 106. A washer 109 is installed at the bottom end of the second spring 108. The outside of the washer 109 is installed inside the connecting module 8.

[0028] Specifically, when the connecting module 8 is installed into the component slot 9 inside the support platform 1, the mounting column 101 drives the snap-fit ​​assembly 10 into the installation position. The semi-circular plate 103 can rotate under the support of the fixing column 102. Under the elastic action of the spring 104, it pushes the snap-fit ​​tooth 105 outward, so that the snap-fit ​​tooth 105 and the snap-fit ​​slot 92 inside the support platform 1 form a snap-fit ​​engagement, thereby making the connecting module 8 stably fixed in the component slot 9, preventing the connecting module 8 from loosening or falling off during equipment operation. When it is necessary to disassemble the connecting module 8, by pressing the pressing block 107, the pressing block 107 drives the sliding rod 106 to slide inward inside the connecting module 8 and compress the second spring 108. During the movement, the sliding rod 106 drives the semicircular plate 103 to rotate around the fixed column 102, so that the locking teeth 105 gradually disengage from the slot 92. When the locking teeth 105 are completely out of the slot 92, the connecting module 8 can be taken out from the component slot 9, thereby realizing the quick disassembly of the connecting module 8. The semicircular plate 103, the first spring 104 and the locking teeth 105 form an automatic locking structure, and at the same time, the sliding rod 106, the pressing block 107 and the second spring 108 form a release mechanism, so that the connecting module 8 can be locked and fixed, and can be quickly disassembled by a simple pressing operation when needed, thereby improving the installation efficiency and maintenance convenience of the device.

[0029] Please see the appendix Figure 7 and attached Figure 8 The threaded rod 4 has multiple heat dissipation holes 11 inside; a threaded head 12 is fixedly connected to one side of the threaded rod 4, and a threaded groove 13 is opened inside the other side of the threaded rod 4; a heat-conducting copper pipe 14 is fixedly connected to the inside of the threaded rod 4.

[0030] Specifically, during the process of the motor 3 driving the threaded rod 4 to rotate continuously and driving the sliding block 5 to move in a straight line, the multiple heat dissipation holes 11 opened inside the threaded rod 4 can form an air circulation channel when the threaded rod 4 rotates, so that the heat generated inside the threaded rod 4 can be diffused outward through the air flow, thereby reducing the temperature rise generated by the threaded rod 4 under long-term working conditions. Meanwhile, the heat-conducting copper pipe 14 set inside the threaded rod 4 can quickly conduct the heat generated inside the threaded rod 4 to the external structure of the threaded rod 4, thereby improving the overall heat dissipation efficiency, enabling the threaded rod 4 to maintain a stable working state during continuous operation, and reducing the problem of structural deformation or transmission accuracy reduction caused by temperature rise. The heat dissipation performance of the threaded rod 4 is improved by the matching structure of the heat dissipation hole 11 and the heat-conducting copper pipe 14, and the connection convenience of the device is improved by the thread head 12 and the thread groove 13, thereby ensuring that the electric actuator has good stability and reliability during long-term operation.

[0031] Working principle: First, the compact electric actuator is installed in the usage position, and the overall structure is supported and fixed by the support platform 1. After the motor 3 is started, it drives the threaded rod 4 connected to its output end to rotate. Since the threaded rod 4 and the sliding block 5 form a threaded transmission relationship, the sliding block 5 is driven to slide linearly along the extension direction of the track 2 during the rotation of the threaded rod 4, thereby driving the support plate 6 fixed on the upper surface of the sliding block 5 to produce linear displacement, realizing the linear drive function of the actuator. At the same time, the track 2 plays a guiding and stabilizing support role for the sliding block 5, and the baffle 7 provides limit protection for the sliding component. When installing the connection module 8, by placing the connection module 8 into the component slot 9 inside the support platform 1, the mounting post 101 in the snap-fit ​​assembly 10 drives the semi-circular plate 103 to rotate at the fixed post 102. Under the elastic action of the spring 104, the snap-fit ​​tooth 105 is engaged with the slot 92. When disassembly is required, pressing the pressing block 107 pushes the sliding rod 106 to move and compresses the spring 108, causing the semi-circular plate 103 to rotate and the snap-fit ​​tooth 105 to disengage from the slot 92, thereby realizing the quick installation and disassembly of the connection module 8. During the operation of the device, the heat dissipation holes 11 and heat-conducting copper pipes 14 inside the threaded rod 4 can conduct and dissipate the heat generated during the driving process of the motor 3, improve the heat dissipation capacity of the threaded rod 4, ensure the stability of the actuator under long-term working conditions, and enable the compact electric actuator to achieve stable, compact and reliable linear drive operation.

[0032] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A compact electric actuator, comprising a support platform (1), characterized in that, The upper surface of the support platform (1) is fixedly connected to a track (2), a motor (3) is fixedly connected to one side of the support platform (1), a threaded rod (4) is connected to the output end of the motor (3), a sliding block (5) is slidably connected to the outside of the track (2), a support plate (6) is fixedly connected to the upper surface of the sliding block (5), a baffle (7) is installed on the other side of the support platform (1), a connecting module (8) is installed between the support platform (1) and the baffle (7), a component slot (9) is opened inside the support platform (1), and a buckle component (10) for fixing the connecting module (8) is installed inside the connecting module (8).

2. A compact electric actuator according to claim 1, characterized in that, The threaded rod (4) is coaxially disposed inside the rotor of the motor (3). The threaded rod (4) passes through the center of the rotor and is threadedly engaged with the nut (15) inside the motor (3). The stator of the motor (3) is configured as an annular coreless coil and sleeved on the outside of the rotor.

3. A compact electric actuator according to claim 1, characterized in that, The component slot (9) includes a mounting slot (91), which is located inside the support platform (1). The support platform (1) also has a card slot (92) inside it. The mounting slot (91) and the card slot (92) are adjacent to each other.

4. A compact electric actuator according to claim 1, characterized in that, The buckle assembly (10) includes a mounting post (101), one side of which is installed inside the connecting module (8). A fixing post (102) is fixedly connected inside the mounting post (101), and a semi-circular plate (103) is rotatably connected to the outside of the fixing post (102). A spring (104) is provided between the semi-circular plate (103) and the mounting post (101), and a locking tooth (105) is fixedly connected to one side of the spring (104).

5. A compact electric actuator according to claim 4, characterized in that, A sliding rod (106) is rotatably connected to one side of the semicircular plate (103). The sliding rod (106) is slidably connected to the inside of the connecting module (8). A pressing block (107) is fixedly connected to one side of the sliding rod (106). A second spring (108) is installed on the other side of the sliding rod (106). A washer (109) is installed at the bottom end of the second spring (108). The outside of the washer (109) is installed inside the connecting module (8).

6. A compact electric actuator according to claim 1, characterized in that, The threaded rod (4) has multiple heat dissipation holes (11) inside.

7. A compact electric actuator according to claim 1, characterized in that, A threaded head (12) is fixedly connected to one side of the threaded rod (4), and a threaded groove (13) is opened inside the other side of the threaded rod (4).

8. A compact electric actuator according to claim 1, characterized in that, The threaded rod (4) is internally fixedly connected to a heat-conducting copper tube (14).

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