Multi-stage electric push rod

Abstract

The utility model particularly relates to the technical field of electric push rods, and discloses a multi-stage electric push rod which comprises a first mounting seat, a second mounting seat is fixedly arranged on the side wall of the first mounting seat, a third mounting seat is fixedly arranged on the side wall of the second mounting seat, a piston rod is inserted into the third mounting seat, and the piston rod is connected with the second mounting seat. A first gear is rotationally connected to the side wall of the second mounting seat, a second gear is rotationally connected to the middle of the second mounting seat, a third gear is rotationally connected to the side wall, close to the second gear, of the second mounting seat, and a first notch is formed in the side wall, close to the second mounting seat, of the first mounting seat and used for mounting of the first gear, the second gear and the third gear. By arranging the first mounting seat, the first notch, the second notch, the transverse partition plate and the lubricating oil, the contact area between the transverse partition plate and the lubricating oil is increased, so that the heat absorption efficiency of the lubricating oil is improved, the rising speed of the internal temperature of the first notch is reduced when the lubricating oil absorbs heat, the internal temperature of the first notch is reduced, and the service life of the gear is prolonged.

Description

Technical Field

[0001] This utility model belongs to the field of electric linear actuator technology, and in particular relates to a multi-stage electric linear actuator. Background Technology

[0002] Multistage electric linear actuators, also known as linear actuators, are power-driven devices mainly composed of actuators and control devices. They can convert the rotational motion of an electric motor into the linear reciprocating motion of the actuator. They can be used as actuators in various simple or complex processes to achieve remote control, centralized control, or automatic control.

[0003] Existing multi-stage electric linear actuators generally consist of three main modules: a drive unit, a transmission unit, and a piston rod. The drive unit is usually in the form of an electric motor, and the transmission unit typically includes gears, a lead screw, and a lead screw slide. The gears mesh to drive the lead screw to rotate, which in turn drives the lead screw slide to move, causing the piston rod, which is sleeved on the outer surface of the lead screw, to move linearly.

[0004] Existing multi-stage electric linear actuators generate high temperatures due to gear friction during prolonged use. The gears may wear down due to prolonged high-temperature operation under high-compound conditions, which may affect the efficiency of gear transmission and the service life of the electric linear actuator. Utility Model Content

[0005] This invention provides a multi-stage electric linear actuator, which aims to solve the problem that in existing multi-stage electric linear actuators, high temperatures are generated by gear friction during long-term use, and the gears may wear due to prolonged high-temperature operation under high-compound conditions, thus affecting the efficiency of gear transmission and the service life of the electric linear actuator.

[0006] This utility model is implemented as follows: a multi-stage electric actuator includes a mounting base one, a mounting base two fixedly mounted on the side wall of the mounting base one, a mounting base three fixedly mounted on the side wall of the mounting base two, a piston rod inserted into the interior of the mounting base three, a gear one rotatably connected to the side wall of the mounting base two, a gear two rotatably connected to the middle of the mounting base two, and a gear three rotatably connected to the side wall of the mounting base two near the gear two. A slot one is formed on the side wall of the mounting base one near the mounting base two for mounting gear one, gear two, and gear three. A slot two is formed inside the mounting base one, and several transverse partitions are fixedly mounted on the inner side wall of the slot two. The bottom of the inner side of the slot two is filled with lubricating oil.

[0007] Preferably, two mounting ears are symmetrically fixed on the side wall of the mounting base to form an integral structure, and threaded holes are opened on the side wall of each mounting ear, which improves the ease of installation of the mounting base.

[0008] Preferably, a connecting pipe is inserted into the top of the mounting base one, the connecting pipe passes through the mounting base one and is connected to the slot two, and an end cap is threaded to the top of the connecting pipe, which improves the convenience of adding lubricating oil.

[0009] Preferably, a servo motor is fixed on the side wall of the second mounting base near the third mounting base, and the output end of the servo motor is fixed on the side wall of the first gear through the second mounting base. The second gear meshes with the first gear and the third gear in sequence.

[0010] Preferably, a main lead screw is rotatably connected to the middle of the mounting base three, and one end of the main lead screw passes through the mounting base three and the mounting base two in sequence and is fixed on the side wall of the gear three.

[0011] Preferably, the mounting base three has a lead screw slide connected internally, the lead screw slide is threaded to the outer surface of the main lead screw, the external dimensions of the main lead screw are adapted to the internal dimensions of the mounting base three, the lead screw slide is fixedly connected to one end of the piston rod, and the piston rod has a slot three in the middle for the main lead screw to be inserted, which improves the stability of the main lead screw movement.

[0012] Preferably, a through hole is provided on the inner side wall of the second slot near the top of the transverse partition, the through hole is connected to the first slot, and a permeable membrane is inserted in the middle of the through hole.

[0013] Compared with the prior art, the embodiments of this application have the following main advantages:

[0014] Firstly, by setting up mounting base one, slot one, slot two, a horizontal partition, and lubricating oil, the horizontal partition increases the contact area with the lubricating oil, thereby improving the heat absorption efficiency of the lubricating oil. When the lubricating oil absorbs heat, it reduces the rate of temperature rise inside slot one, thereby reducing the internal temperature of slot one and improving the service life of the gears. Secondly, by setting up through holes, the lubricating oil that evaporates inside slot two enters the interior of slot one to lubricate gear one, gear two, and gear three, thereby improving the working stability of the gears. Attached Figure Description

[0015] Figure 1 This is a frontal three-dimensional structural diagram of the present invention.

[0016] Figure 2 This is a frontal three-dimensional structural diagram of the mounting base of this utility model.

[0017] Figure 3 This is a top view cross-sectional structural diagram of the present invention.

[0018] Figure 4 This is a two-sided perspective view of the mounting base of this utility model.

[0019] Figure 5This is a schematic cross-sectional view of one side of the mounting base of this utility model.

[0020] The attached figures are labeled as follows: 1. Mounting base one; 2. Mounting base two; 3. Mounting base three; 4. Piston rod; 5. Servo motor; 6. Mounting ear; 7. Connecting pipe; 8. End cap; 9. Groove one; 10. Groove two; 11. Horizontal partition; 12. Gear one; 13. Gear two; 14. Gear three; 15. Main lead screw; 16. Lead screw slide; 17. Groove three; 18. Through hole; 19. Permeable membrane; 20. Lubricating oil. Detailed Implementation

[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein in the specification of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "comprising" and "having," and any variations thereof, in the specification, claims, and foregoing drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the specification, claims, or foregoing drawings of this application are used to distinguish different objects, not to describe a particular order.

[0022] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0023] Please see Figure 1-5The present invention provides an embodiment of a multi-stage electric actuator, comprising a mounting base 1, a mounting base 2 fixed to the side wall of the mounting base 1 by bolts, a mounting base 3 fixed to the side wall of the mounting base 2 by welding, a piston rod 4 inserted into the interior of the mounting base 3, a gear 12 rotatably connected to the side wall of the mounting base 2, a gear 23 rotatably connected to the middle of the mounting base 2, a gear 34 rotatably connected to the side wall of the mounting base 2 near the gear 23, and a slot 9 formed on the side wall of the mounting base 1 near the mounting base 2. A servo motor 5 is fixedly mounted on the side wall of mounting base 2 near mounting base 3. The output end of the servo motor 5 passes through mounting base 2 and is fixed to the side wall of gear 12. Gear 2 13 meshes with gear 12 and gear 3 14 in sequence. A main lead screw 15 is rotatably connected in the middle of mounting base 3. One end of the main lead screw 15 passes through mounting base 3 and mounting base 2 in sequence and is fixed to the side wall of gear 3 14. A lead screw slide 16 is slidably connected inside mounting base 3. The lead screw 15 is connected to the outer surface of the main lead screw 15. The lead screw slide 16 is fixedly connected to one end of the piston rod 4 by welding. When the servo motor 5 is started to drive the gear 12 to rotate, it will drive the gear 13, gear 14 and the main lead screw 15 to rotate in sequence. The main lead screw 15 drives the lead screw slide 16 to slide horizontally inside the mounting base 3, thereby driving the piston rod 4 to move horizontally, thus realizing the horizontal reciprocating traction of the object. The mounting base 11 has a slot 10 inside. Several transverse partitions 11 are fixed on the inner side wall of the slot 10 to increase the... With a large contact area, heat transfer efficiency is improved. The bottom of the slot 210 is filled with lubricating oil 20. When the transmission of gear 12, gear 23 and gear 314 causes the internal temperature of slot 19 to rise, the heat is transferred to the lubricating oil 20 through the mounting base 11 and the transverse partition 11. The lubricating oil 20 has a large specific heat capacity. When the lubricating oil 20 absorbs heat, it can reduce the rate of temperature rise inside slot 19, so that the excess heat is stably dissipated during the slow rise, thereby reducing the extreme high temperature of slot 19 and improving the service life of gear meshing transmission.

[0024] Two mounting ears 6 are symmetrically fixed on the side wall of the mounting base 1 to form an integral structure. The side wall of the mounting ears 6 is provided with threaded holes, which improves the ease of installation of the mounting base 1. A connecting pipe 7 is inserted into the top of the mounting base 1. The connecting pipe 7 passes through the mounting base 1 and is connected to the slot 10. The top of the connecting pipe 7 is threaded with an end cap 8, which improves the ease of adding lubricating oil 20.

[0025] The external dimensions of the main lead screw 15 are adapted to the internal dimensions of the mounting base 3. The piston rod 4 has a slot 3 17 in the middle for the main lead screw 15 to be inserted, which improves the stability of the main lead screw 15's movement.

[0026] A through hole 18 is provided on the inner side wall of slot 2 10 near the top of the transverse partition 11. The through hole 18 is connected to slot 1 9. A permeable membrane 19 is inserted in the middle of the through hole 18. After some of the lubricating oil 20 is vaporized, it enters the interior of slot 1 9 through the through holes 18 and 19, thereby making uniform contact with the surfaces of gear 1 12, gear 2 13 and gear 3 14, lubricating the gears and further improving the stability of the gear transmission.

[0027] Working Principle: When using this multi-stage electric actuator, the operator first connects an external power supply and fixes the mounting ear 6 with bolts to achieve the installation and positioning of the electric actuator. The output end of the piston rod 4 is fixedly connected to the object through a coupling. When the servo motor 5 is started to drive gear 12 to rotate, it sequentially drives gear 13, gear 14 and main lead screw 15 to rotate. The main lead screw 15 drives the lead screw slide 16 to slide horizontally inside the mounting base 3, thereby driving the piston rod 4 to move horizontally, thus achieving horizontal reciprocating traction of the object. When the transmission of gear 12, gear 13 and gear 14 causes the internal temperature of slot 9 to rise, the heat is transferred to the lubricating oil 20 through the mounting base 1 and the transverse partition 11. The lubricating oil 20 has a large specific heat capacity. When the lubricating oil 20 absorbs heat, it can reduce the rate of temperature rise inside slot 9, so that the excess heat is stably dissipated during the slow rise process, thereby reducing the extreme high temperature of slot 9 and improving the service life of the gear meshing transmission.

[0028] Secondly, when the internal temperature of slot 210 rises, some of the lubricating oil 20 vaporizes and enters the interior of slot 19 through through holes 18 and 19, thereby making uniform contact with the surfaces of gear 12, gear 213 and gear 314, lubricating the gears and further improving the stability of the gear transmission.

[0029] It should be noted that, for the sake of simplicity, the foregoing embodiments are all described as a series of actions. However, those skilled in the art should understand that the present invention is not limited to the described order of actions, as some steps may be performed in other orders or simultaneously according to the present invention. Furthermore, those skilled in the art should also understand that the embodiments described in the specification are preferred embodiments, and the actions and modules involved are not necessarily essential to the present invention.

[0030] It should be understood that the disclosed apparatus can be implemented in other ways, given the several embodiments provided in this application. For example, the apparatus embodiments described above are merely illustrative. For instance, the division of units described above may be implemented in other ways in practice. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or communication connections shown or discussed may be through some interfaces; indirect coupling or communication connections between devices or units may be telecommunications or other forms.

[0031] The units described above as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0032] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit the scope of protection of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on these embodiments, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model. Although this utility model has been described in detail with reference to the above embodiments, those skilled in the art can still combine, add, delete, or otherwise adjust the features of the various embodiments of this utility model according to the circumstances without conflict or creative effort, thereby obtaining different technical solutions that do not fundamentally depart from the concept of this utility model. These technical solutions are also within the scope of protection of this utility model.

Claims

1. A multi-stage electric linear actuator, characterized in that, The device includes a mounting base 1 (1), a mounting base 2 (2) fixedly mounted on the side wall of the mounting base 1 (1), a mounting base 3 (3) fixedly mounted on the side wall of the mounting base 2 (2), a piston rod (4) inserted into the interior of the mounting base 3 (3), a gear 1 (12) rotatably connected to the side wall of the mounting base 2 (2), a gear 2 (13) rotatably connected to the middle of the mounting base 2 (2), a gear 3 (14) rotatably connected to the side wall of the mounting base 2 (2) near the gear 2 (13), a slot 1 (9) is provided on the side wall of the mounting base 1 (1) near the mounting base 2 (2) for the installation of gear 1 (12), gear 2 (13) and gear 3 (14), a slot 2 (10) is provided inside the mounting base 1 (1), a plurality of transverse partitions (11) are fixedly mounted on the inner side wall of the slot 2 (10), and the inner bottom of the slot 2 (10) is filled with lubricating oil (20).

2. The multi-stage electric linear actuator according to claim 1, characterized in that: Two mounting ears (6) are symmetrically fixed on the side wall of the mounting base (1) to form an integral structure, and threaded holes are opened on the side wall of each mounting ear (6).

3. A multi-stage electric linear actuator according to claim 2, characterized in that: A connecting pipe (7) is inserted into the top of the mounting base (1). The connecting pipe (7) passes through the mounting base (1) and is connected to the slot (10). An end cap (8) is threaded onto the top of the connecting pipe (7).

4. A multi-stage electric linear actuator according to claim 1, characterized in that: A servo motor (5) is fixed on the side wall of the second mounting base (2) near the third mounting base (3). The output end of the servo motor (5) passes through the second mounting base (2) and is fixed on the side wall of the first gear (12). The second gear (13) meshes with the first gear (12) and the third gear (14) in sequence.

5. A multi-stage electric linear actuator according to claim 4, characterized in that: The mounting base three (3) is rotatably connected to a main lead screw (15), one end of which passes through the mounting base three (3) and the mounting base two (2) and is fixed on the side wall of the gear three (14).

6. A multi-stage electric linear actuator according to claim 5, characterized in that: The mounting base three (3) is internally slidably connected to a lead screw slide (16), which is threadedly connected to the outer surface of the main lead screw (15). The external dimensions of the main lead screw (15) are adapted to the internal dimensions of the mounting base three (3). The lead screw slide (16) is fixedly connected to one end of the piston rod (4). The piston rod (4) has a slot three (17) in the middle for the main lead screw (15) to be inserted.

7. A multi-stage electric linear actuator according to claim 4, characterized in that: A through hole (18) is provided on the inner side wall of the slot two (10) near the top of the diaphragm (11). The through hole (18) is connected to the slot one (9). A permeable membrane (19) is inserted in the middle of the through hole (18).

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