Driving assembly and electronic atomization device

Abstract

The present application provides a driving assembly and an electronic atomization device. The driving assembly provided by the present application comprises: a push rod; a screw threadedly connected to the push rod; a gearbox connected to the screw; a motor connected to the gearbox and used for providing rotational power to the screw by means of the gearbox; and a bearing, wherein one end of the screw passes through the bearing and is transmittingly connected to a gear in the gearbox, the bearing is rigidly connected to a housing of the gearbox, and an inner ring of the bearing is fixedly connected to the screw. In this way, one end of the screw is transmittingly connected to the gear in the gearbox, the inner ring of the bearing is fixedly connected to the screw, the bearing is rigidly connected to the housing of the gearbox, the gearbox and the bearing increase the limitation in the axial direction of the screw, and the bearing enhances the guidance in the axial direction of the screw, so that the end of the screw away from the gearbox rotates more stably, thereby improving the stability of liquid pushing.

Description

A driving component and an electronic atomization device

[0001] Priority information

[0002] This application claims priority and benefits of patent application No. 202420187163.4 filed with the State Intellectual Property Office of China on January 24, 2024, and incorporates its entire contents into this application by reference. Technical Field

[0003] The present invention relates to the field of atomization technology, and in particular to a drive assembly and an electronic atomization device. Background Art

[0004] In related technologies, some electronic atomization devices, such as facial oxygen injection devices, beauty and repair devices, and medical atomizers, utilize an atomizing element to atomize an atomizing medium to generate an aerosol. In some embodiments, an active liquid supply method can be used to push the atomizing medium into the atomizing element.

[0005] Piston-type atomizer cartridges can actively supply liquid to the atomizer element. However, existing drive components have unstable liquid delivery, which reduces the user experience. Therefore, solving the problem of unstable liquid delivery and poor performance of existing atomizer devices is of great practical significance. Summary of the Invention

[0006] The main technical problem solved by this application is the problem that the existing atomization device has unstable liquid pushing and poor effect.

[0007] In order to solve the above technical problems, a technical solution adopted in this application is: a drive assembly is provided, including: a push rod; a screw rod, the screw rod is threadedly connected to the push rod, and is used to drive the push rod to move axially; a reduction gear box, connected to the screw rod; a motor, connected to the reduction gear box, and is used to provide rotational power to the screw rod through the reduction gear box; a bearing, one end of the screw rod passes through the bearing and is connected to the gear transmission in the reduction gear box; wherein, the bearing is rigidly connected to the housing of the reduction gear box, and the inner ring of the bearing is fixedly connected to the screw rod.

[0008] In one embodiment, a pressure plate is rigidly connected to the housing of the reduction gearbox; the bearing is rigidly connected to the pressure plate, and one end of the screw passes through the bearing and the pressure plate.

[0009] In one embodiment, the pressure plate has a groove on its surface away from the reduction gearbox, the bottom of the groove has a through hole, the bearing is fixedly disposed in the groove, and one end of the screw passes through the bearing and the through hole.

[0010] In one embodiment, the end surface of the bearing away from the reduction gear box is flush with the surface of the pressure plate away from the reduction gear box, or the end surface of the bearing away from the reduction gear box is higher than the surface of the pressure plate away from the reduction gear box.

[0011] In one embodiment, the wall of the through hole is spaced apart from one end of the screw, and a seal is provided between the wall of the through hole and the side surface of one end of the screw; the aperture of the through hole is greater than or equal to the outer diameter of the inner ring of the bearing, and less than or equal to the inner diameter of the outer ring of the bearing.

[0012] The present application also provides an electronic atomization device, comprising:

[0013] a housing having a receiving cavity;

[0014] a liquid storage component, disposed in the receiving cavity;

[0015] an atomizing assembly, connected to the liquid storage assembly;

[0016] A drive assembly is provided on one side of the liquid storage assembly and is used to push the atomized medium in the liquid storage assembly into the atomization assembly. The drive assembly includes a push rod, a screw, a reduction gearbox, a motor and a bearing. The screw is threadedly connected to the push rod and is used to drive the push rod to move axially. The reduction gearbox is connected to the screw. The motor is connected to the reduction gearbox and is used to provide rotational power to the screw through the reduction gearbox. One end of the screw passes through the bearing and is connected to the gear transmission in the reduction gearbox. The bearing is rigidly connected to the housing of the reduction gearbox, and the inner ring of the bearing is fixedly connected to the screw.

[0017] Wherein, the liquid storage assembly includes a piston, and one end of the push rod of the driving assembly away from the motor of the driving assembly abuts against the piston;

[0018] The push rod and the screw rod are fixed by rubber coating via the concave-convex structure, so that the push rod moves linearly on the screw rod.

[0019] In one embodiment, in the electronic atomization device provided in this application, the driving assembly further includes:

[0020] A pressure plate, the pressure plate being rigidly connected to the housing of the reduction gearbox;

[0021] The bearing is rigidly connected to the pressing plate, and one end of the screw passes through the bearing and the pressing plate;

[0022] The guide device is selected from a piston, and the push rod and the screw are fixed after being rubber-coated through a concave-convex structure, so that the push rod moves linearly on the screw.

[0023] In one embodiment, in an electronic atomization device provided in the present application, the surface of the pressure plate away from the reduction gearbox has a groove, the bottom of the groove has a through hole, the bearing is fixed in the groove, and one end of the screw passes through the bearing and the through hole.

[0024] In some embodiments, in an electronic atomization device provided herein, the portion of the screw passing through the bearing and the pressure plate accounts for 8% to 15% of the entire screw. Preferably, the portion of the screw passing through the bearing and the pressure plate accounts for 8%, 9%, 10%, 11%, 12%, 13%, 14%, or 15% of the entire screw. Further preferably, the portion of the screw passing through the bearing and the pressure plate accounts for 10% of the entire screw.

[0025] In one embodiment, in an electronic atomization device provided in the present application, the end surface of the bearing away from the reduction gear box is flush with the surface of the pressure plate away from the reduction gear box, or the end surface of the bearing away from the reduction gear box is higher than the surface of the pressure plate away from the reduction gear box.

[0026] In one embodiment, in an electronic atomization device provided in the present application, the wall of the through hole is spaced apart from one end of the screw, and a seal is provided between the wall of the through hole and the side surface of one end of the screw.

[0027] In one embodiment, in an electronic atomization device provided in the present application, the aperture of the through hole is greater than or equal to the outer diameter of the inner ring of the bearing, and less than or equal to the inner diameter of the outer ring of the bearing.

[0028] In one embodiment, in an electronic atomization device provided by the present application, the outer ring of the bearing is fixedly connected to the side wall of the groove, and / or the outer ring of the bearing is fixedly connected to the bottom wall of the groove;

[0029] The outer side surface of one end of the screw is fixedly connected to the inner side surface of the inner ring of the bearing; and / or the outer side surface of one end of the screw has an annular flange, and the annular flange is fixedly connected to the end surface of the inner ring of the bearing away from the reduction gear box.

[0030] In one embodiment, in an electronic atomization device provided in the present application, the housing of the reduction gearbox includes an annular side wall and a top wall, and the pressure plate is fixedly connected to the top wall by bolts.

[0031] In one embodiment, in an electronic atomization device provided in the present application, the projection of the pressure plate on the motor covers the projection of the annular side wall on the motor.

[0032] In one embodiment, a projection of the pressure plate on the motor overlaps with a projection of the reduction gearbox on the motor.

[0033] In one embodiment, the diameter of the screw is 2 mm-4 mm.

[0034] In one embodiment, the length of the screw is 24 mm-48 mm.

[0035] In one embodiment, the length of the screw is 2.5 to 3.5 times the diameter of the screw.

[0036] In one embodiment, the outer diameter of the bearing is 4 mm to 8 mm; and / or,

[0037] The outer diameter of the bearing is 1.5 to 3 times the diameter of the screw.

[0038] In one embodiment, the diameter of the screw is 2 mm to 4 mm. Preferably, the diameter of the screw can be 2 mm, 2.1 mm, 2.2 mm, 2.3 mm, 2.4 mm, 2.5 mm, 2.6 mm, 2.7 mm, 2.8 mm, 2.9 mm, 3.0 mm, 3.1 mm, 3.2 mm, 3.3 mm, 3.4 mm, 3.5 mm, 3.6 mm, 3.7 mm, 3.8 mm, 3.9 mm, or 4.0 mm. More preferably, the diameter of the screw is 2.98 mm.

[0039] In some embodiments, the length of the screw is 24 mm to 48 mm. Preferably, the length of the screw is 24 mm, 25 mm, 26 mm, 27 mm, 28 mm, 29 mm, 30 mm, 31 mm, 32 mm, 33 mm, 34 mm, 35 mm, 36 mm, 37 mm, 38 mm, 39 mm, 40 mm, 41 mm, 42 mm, 43 mm, 45 mm, 47 mm, or 48 mm. Further preferably, the length of the screw is 36 mm.

[0040] In some embodiments, the length of the screw is 2.5 to 3.5 times the diameter of the screw. Preferably, the length of the screw is 2.5, 2.6, 2.7, 2.8, 2.9, 3.0, 3.1, 3.2, 3.3, 3.4, or 3.5 times the diameter of the screw. Further preferably, when the diameter of the screw is 2.98 mm, the length of the screw is 36 mm.

[0041] In some embodiments, the outer diameter of the bearing is 4 mm-8 mm.

[0042] In some embodiments, the outer diameter of the bearing is 1.5 to 3 times the diameter of the screw.

[0043] In one embodiment, the electronic atomization device further includes: an air supply component for supplying air to the atomization component.

[0044] In one embodiment, the atomizing component is a two-phase flow atomizing nozzle.

[0045] In one embodiment, the liquid storage assembly includes a piston.

[0046] In one embodiment, an end of the push rod of the driving assembly away from the motor of the driving assembly abuts against the piston.

[0047] The beneficial effects of this application are: one end of the screw is connected to the gear transmission in the reduction box, the inner ring of the bearing is fixedly connected to the screw, the bearing is rigidly connected to the housing of the reduction box, the reduction box and the bearing increase the axial limit of the screw, and at the same time, the bearing strengthens the axial guidance of the screw, so that the rotation of the end of the screw away from the reduction box is more stable, thereby improving the liquid pushing stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] FIG1 is a simplified structural diagram of an electronic atomization device provided in one embodiment of the present application;

[0049] FIG2 is a schematic structural diagram of a liquid storage assembly provided in one embodiment of the present application;

[0050] FIG3 is an overall schematic diagram of a drive assembly provided in one embodiment of the present application;

[0051] FIG4 is a cross-sectional view along line AA of FIG3 ;

[0052] FIG5 is an overall schematic diagram of a pressing plate provided in one embodiment of the present application;

[0053] FIG6 is an enlarged view of point P in FIG4 ;

[0054] FIG7 is an overall schematic diagram of a bearing provided in one embodiment of the present application;

[0055] FIG8 is an enlarged view of the second drive assembly provided in the present application at point P in FIG4 .

[0056] FIG9 is a schematic diagram of the push rod of the drive assembly provided in the present application before movement.

[0057] FIG10 is a schematic diagram of the push rod of the drive assembly provided in the present application after moving relative to the screw rod.

[0058] FIG11 is a schematic diagram showing the positional relationship between the push rod and the screw rod of the drive assembly provided in this application.

[0059] Explanation of the accompanying drawings: 1-electronic atomization device; 2-housing; 3-liquid storage assembly; 31-piston; 4-atomization assembly; 5-driving assembly; 51-push rod; 52-screw; 521-annular flange; 53-reduction gearbox; 530-housing; 531-annular side wall; 532-top wall; 54-motor; 55-bearing; 551-inner ring; 552-outer ring; 56-pressure plate; 561-groove; 562-through hole; 57-seal; 58-concave-convex structure 6-air supply assembly. DETAILED DESCRIPTION

[0060] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0061] The terms "first," "second," and "third" in this application are used only for descriptive purposes and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first," "second," or "third" may explicitly or implicitly include at least one of such features. In the description of this application, "multiple" means at least two, for example, two, three, etc., unless otherwise specifically defined. All directional indications in the embodiments of this application (such as up, down, left, right, front, back...) are only used to explain the relative positional relationship, movement, etc. between the components under a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications also change accordingly. In addition, the terms "including" and "having," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units that are not listed, or may optionally include other steps or units that are inherent to these processes, methods, products, or devices.

[0062] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0063] In the prior art, a stepper motor drives a screw through a reduction gearbox. The screw and reduction gearbox gear are directly welded together, effectively securing one end of the screw. The other end, or top end, of the screw is prone to deflection during rotation, causing overall fluid delivery instability.

[0064] In addition, there is a push rod at the top of the screw, and the push rod needs to push the atomizer piston to move, and the push rod is subjected to a force of 100N. According to the force analysis, the connection between the screw and the reduction gear is also subject to very large pressure. The existing solution is prone to the screw pressing down the gear in the reduction gear and then contacting with other components, causing friction between the gear end faces, resulting in a decrease in overall thrust and abnormal friction noise. The guide device is selected from the piston, and the push rod and the screw are fixed after being coated with rubber through a concave-convex structure, so that the push rod moves linearly on the screw. The push rod is matched with the main frame bracket, so that the push rod cannot rotate. The push rod and the screw are fixed after being coated with rubber through a concave-convex structure, so that the push rod and the screw are connected and fixed to each other, and the rotation of the motor is converted into linear motion.

[0065] In a specific embodiment, the diameter of the screw is precisely designed and is set within the range of 2 mm to 4 mm. Within this range, the diameter of the screw has a variety of optional values, such as 2 mm, 2.1 mm, 2.2 mm, 2.3 mm, 2.4 mm, 2.5 mm, 2.6 mm, 2.7 mm, 2.8 mm, 2.9 mm, 3.0 mm, 3.1 mm, 3.2 mm, 3.3 mm, 3.4 mm, 3.5 mm, 3.6 mm, 3.7 mm, 3.8 mm, 3.9 mm, or 4.0 mm. Further preferably, in a specific embodiment, the diameter of the screw is 2.98 mm.

[0066] In a specific embodiment, the length of the screw is precisely designed and is set within the range of 24 mm to 48 mm. Within this range, the length of the screw has a variety of optional values, such as 24 mm, 25 mm, 26 mm, 27 mm, 28 mm, 29 mm, 30 mm, 31 mm, 32 mm, 33 mm, 34 mm, 35 mm, 36 mm, 37 mm, 38 mm, 39 mm, 40 mm, 41 mm, 42 mm, 43 mm, 45 mm, 47 mm, or 48 mm. Further preferably, in a specific embodiment, the length of the screw is 36 mm.

[0067] In some embodiments, the length of the screw is 2.5 to 3.5 times the diameter of the screw. Preferably, the length of the screw is 2.5, 2.6, 2.7, 2.8, 2.9, 3.0, 3.1, 3.2, 3.3, 3.4, or 3.5 times the diameter of the screw. Further preferably, when the diameter of the screw is 2.98 mm, the length of the screw is 36 mm.

[0068] In some embodiments, the outer diameter of the bearing is 4 mm to 8 mm, which is 1.5 to 3 times the diameter of the screw.

[0069] In some embodiments, the portion of the screw passing through the bearing and the pressure plate accounts for 8% to 15% of the entire screw. Preferably, the portion of the screw passing through the bearing and the pressure plate accounts for 8%, 9%, 10%, 11%, 12%, 13%, 14%, or 15% of the entire screw. Further preferably, in a specific embodiment, the portion of the screw passing through the bearing and the pressure plate accounts for 10% of the entire screw.

[0070] Based on this, an embodiment of the present application provides an electronic atomization device, which effectively improves the problems of unstable liquid pushing, reduced thrust and abnormal friction noise.

[0071] The present application is described in detail below with reference to the accompanying drawings and embodiments.

[0072] Please refer to FIG1 , which is a simplified structural diagram of an electronic atomization device provided in one embodiment of the present application.

[0073] An embodiment of the present application provides an electronic atomization device 1 , which includes a housing 2 , a liquid storage component 3 , an atomization component 4 and a drive component 5 .

[0074] In Figure 1, the housing 2 has a receiving cavity, and a liquid storage assembly 3 is disposed within the receiving cavity. The liquid storage assembly 3 is used to store an atomized medium. The atomized medium includes, but is not limited to, liquid medicine, nutrient solution, beauty serum, essence, essence lotion, disinfectant, insecticide, and pesticide, so that the electronic atomization device 1 using the atomized medium can be applied to various fields, such as the medical field, the beauty field, and the agricultural field.

[0075] Atomizer assembly 4 is disposed on one side of, and in communication with, liquid reservoir assembly 3. Liquid reservoir assembly 3 delivers atomized medium to atomizer assembly 4. Drive assembly 5 is disposed on the other side of liquid reservoir assembly 3 and is used to push the atomized medium from liquid reservoir assembly 3 into atomizer assembly 4. Atomizer assembly 4 atomizes the atomized medium to form an aerosol, which is then available to the user.

[0076] As shown in Figure 2, which is a schematic diagram of the structure of a liquid storage assembly according to one embodiment of the present application, the liquid storage assembly 3 includes a piston 31, with a push rod 51 abutting against the piston 31 at its end away from the motor 54. The drive assembly 5 drives the piston 31 via the push rod 51, and the piston 31 pushes the atomized medium within the liquid storage assembly 3 into the atomizer assembly 4.

[0077] The atomizing assembly 4 can be an ultrasonic atomizing assembly, an electric heating atomizing assembly, a two-phase flow atomizing nozzle assembly, etc. in the prior art. In this embodiment, the atomizing assembly 4 is taken as an example of a two-phase flow atomizing nozzle. The electronic atomizing device 1 also includes an air supply assembly 6, which is used to supply air to the atomizing assembly 4. The high-pressure gas can shear the atomizing medium entering the atomizing assembly 4 into atomized particles of suitable particle size, i.e., aerosol, and carry the aerosol out of the spray port of the atomizing assembly 4. Among them, the air supply assembly 6 can include an air pump.

[0078] Figure 3 is an overall schematic diagram of the drive assembly provided in an embodiment of the present application; Figure 4 is a cross-sectional view of Figure 3 along AA; Figure 5 is an overall schematic diagram of the pressure plate provided in an embodiment of the present application; Figure 6 is an enlarged view of point P in Figure 4; Figure 7 is an overall schematic diagram of the bearing provided in an embodiment of the present application.

[0079] In one embodiment, the pressure plate is in the shape of a cuboid, with two screw holes at diagonally opposite corners in the middle and a hole in the middle to prevent the bearing.

[0080] In one embodiment, as shown in FIG3 , the driving assembly 5 includes a push rod 51 , a screw rod 52 , a reduction gear box 53 , a motor 54 and a bearing 55 .

[0081] The screw 52 is threadedly connected to the push rod 51 and is used to drive the push rod 51 in axial motion. The end of the push rod 51, remote from the motor 54, abuts the piston 31, pushing the piston 31 to move. The reduction gearbox 53 is connected to the screw 52. The motor 54 is connected to the reduction gearbox 53, which provides rotational power to the screw 52 through the reduction gearbox 53. The screw 52 drives the push rod 51 to move, and the push rod 51 pushes the piston 31 in the liquid storage assembly 3, thereby delivering the atomized medium in the liquid storage assembly 3 to the atomizer assembly 4. The atomized medium is then atomized to form an aerosol for the user.

[0082] Referring to Figure 4 , the end of the screw 52 near the motor 54 passes through a bearing 55 and is drivingly connected to a gear (not shown) within the reduction gear 53. The bearing 55 is rigidly connected to the housing 530 of the reduction gear 53. The bearing 55 and the reduction gear 530 can be directly rigidly connected, for example, by welding or forming part of the reduction gear 530. Alternatively, the bearing 55 can be indirectly rigidly connected to the reduction gear 53 via other connecting members, such as a pressure plate 56. Referring to Figure 6 , the inner ring 551 of the bearing 55 is fixedly connected to the screw 52, ​​for example, by welding, interference fit, or the like.

[0083] As mentioned above, one end of the screw 52 is transmission-connected to the gear (not shown) in the reduction gear 53, the inner ring 551 of the bearing 55 is fixedly connected to the screw 52, ​​and the bearing 55 is rigidly connected to the housing 530 of the reduction gear 53. The reduction gear 53 and the bearing 55 increase the axial limit of the screw 52. At the same time, the constraint of the bearing 55 on the screw 52 strengthens the axial guidance of the screw 52, ​​so that the rotation of the end of the screw 52 away from the reduction gear 53 is more stable, thereby improving the liquid pushing stability.

[0084] It will be appreciated that the bearing 55 is rigidly connected to the housing 530 of the reduction gearbox 53, and the inner ring 551 of the bearing 55 is fixedly connected to the screw 52. Therefore, the screw 52 and the housing 530 of the reduction gearbox 53 are also rigidly connected. Thus, during operation of the drive assembly 5, the motor 54 drives the reduction gearbox 53, which in turn drives the screw 52. The screw 52 causes the push rod 51 to move axially, which in turn pushes the piston 31 axially. During the movement of the piston 31, force analysis indicates that the push rod 51 experiences both axial resistance and a significant force acting on the screw 52. Because the screw 52 is fixedly connected to the bearing 55, and the bearing 55 is rigidly connected to the housing 530 of the reduction gearbox 53, the force acting on the screw 52 is transmitted to the outer shell of the reduction gearbox 53 through the bearing 55. In this way, the gears (not shown) inside the reduction gearbox 53 are no longer affected by the axial pressure of the screw 52. At the same time, the force acting on the screw 52 will not act on the motor 54, thereby increasing the original upper limit of the force of the motor 54 and improving the force life of the motor 54.

[0085] In one embodiment, as shown in Figures 3 and 4, the drive assembly 5 further includes a pressure plate 56, which is rigidly connected to the housing 530 of the reduction gearbox 53, and the bearing 55 is rigidly connected to the pressure plate 56. The pressure plate 56 has an opening for the screw 52 to pass through. One end of the screw 52 passes through the bearing 55 and the pressure plate 56, and is transmission-connected to a gear (not shown) in the reduction gearbox 53. In this way, by providing the pressure plate 56, the pressure plate 56 is rigidly connected to the housing 530 of the reduction gearbox 53, the bearing 55 is rigidly connected to the pressure plate 56, and the inner ring 551 of the bearing 55 is fixedly connected to the screw 52, ​​so that the reduction gearbox 53 and the bearing 55 increase the axial limit of the screw 52. At the same time, it is convenient to rigidly connect the bearing 55 to the housing 530 of the reduction gearbox through the pressure plate 56, and the installation process is simple.

[0086] Specifically, in one embodiment, as shown in Figures 4 and 5, the pressure plate 56 is a plate-like body with a certain strength, and can be a metal plate, such as a steel plate. The surface of the pressure plate 56 away from the reduction gearbox 53 has a groove 561, and the space of the groove 561 can be a cylinder, a prism, etc., and the space of the groove 561 is sufficient to accommodate the bearing 55. The bottom of the groove 561 has a through hole 562, and the shape of the through hole 562 can be square, circular, etc. The bearing 55 is fixedly arranged in the groove 561, and the bearing 55 and the through hole 562 of the groove 561 are coaxially arranged along the central axis M. One end of the screw 52 passes through the bearing 55 and the through hole 562, and is connected to the gear (not shown) in the reduction gearbox 53.

[0087] Specifically, in one embodiment, as shown in FIG5 , the groove is a circular table with a length that passes through the pressure plate, a large circle diameter that is 6 mm as the bearing diameter, and a small circle diameter that is approximately 3 mm.

[0088] In one embodiment, as shown in FIG6 , the end surface of the bearing 55 away from the reduction gearbox 53 is flush with the surface of the pressure plate 56 away from the reduction gearbox 53. This ensures that the end surface of the bearing 55 away from the reduction gearbox 53 does not protrude beyond the surface of the pressure plate 56 away from the reduction gearbox 53, thereby not increasing the overall volume of the pressure plate 56 and preventing interference with the installation of other components. Alternatively, the end surface of the bearing 55 away from the reduction gearbox 53 is higher than the surface of the pressure plate 56 away from the reduction gearbox 53. This increases the axial contact area between the bearing 55 and the screw 52, ​​strengthens the constraint of the bearing 55 on the screw 52, ​​better prevents the screw 52 from tilting, and makes the rotation of the screw 52 more stable.

[0089] In one embodiment, as shown in Figures 4 and 6, the housing 530 of the reduction gearbox 53 includes an annular side wall 531 and a top wall 532, and the pressure plate 56 is fixedly connected to the top wall 532 by bolts (not shown). The projection of the pressure plate 56 on the motor 54 covers the projection of the annular side wall 531 on the motor 54. In this way, the pressure plate 56 can be supported by the annular side wall 531 and the top wall 532 of the reduction gearbox 53.

[0090] In one embodiment, the projection of the pressure plate 56 on the motor 54 overlaps with the projection of the reduction gearbox 53 on the motor 54. In this way, the radial size of the reduction gearbox 53 is not increased, which is equivalent to increasing the length of the reduction gearbox 53 only in the axial direction, thereby avoiding affecting the installation of other components, such as sensors and keypads.

[0091] In one embodiment, as shown in FIG6 , the wall of the through-hole 562 is spaced apart from one end of the screw 52. Thus, the screw 52 and the through-hole 562 are spaced apart, and the motor 54 drives the screw 52 to rotate via the reduction gearbox 53. The rotating screw 52 does not come into contact with the wall of the through-hole 562, thereby avoiding affecting the rotation of the screw 52. In one embodiment, a seal 57 is provided between the wall of the through-hole 562 and the side surface of one end of the screw 52. The seal 57 is an annular seal 57 made of silicone. The seal 57 blocks the gap between the through-hole 562 and the screw 52, ​​preventing the atomized medium from leaking into the reduction gearbox 53 or the motor 54 and causing damage to the components. Alternatively, the top wall 532 of the reduction gear box 53 has a through hole (not marked in the figure) for inserting the screw 52, ​​and the end of the seal 57 near the reduction gear box 53 extends through the through hole of the top wall 532 of the reduction gear box 53. Preferably, the seal 57 extends to the surface of the top wall 532 near the motor 54 to better seal the gap between the through hole 562 and the screw 52, ​​thereby preventing the atomized medium from leaking into the reduction gear box 53 or the motor 54 and causing damage to the device.

[0092] As shown in Figure 7, the diameter R of through-hole 562 is greater than or equal to the outer diameter R1 of the inner race 551 of bearing 55, and less than or equal to the inner diameter R2 of the outer race 552 of bearing 55. Thus, bearing 55 is fixedly disposed within groove 561, and the bearing 55 and through-hole 562 of groove 561 are coaxially arranged along central axis M. Screw 52 can pass through bearing 55 and through-hole 562 unimpeded. The end of bearing 55's inner race 551, which is adjacent to reduction gearbox 53, does not contact the bottom of groove 561 but is suspended in the air, allowing the inner race 551 of bearing 55 to rotate without interference from the bottom of groove 561. Furthermore, a gap is provided between through-hole 562 and screw 52, ​​facilitating the installation of a seal 57 therebetween to seal the gap. The diameter of through-hole 562 should not be too large. It is understood that since bearing 55 is fixedly disposed within groove 561, the contact area between bearing 55 and the bottom wall of groove 561 should not be too small, thereby enhancing the support provided by groove 561 on bearing 55.

[0093] In one embodiment, as shown in FIG6 , the outer ring 552 of the bearing 55 is fixedly connected to the side wall of the groove 561, and / or the outer ring 552 of the bearing 55 is fixedly connected to the bottom wall of the groove 561. In this way, the bearing 55 is fixedly connected to the groove 561 of the pressure plate 56, so that the bearing 55 and the pressure plate 56 are rigidly connected. The pressure plate 56 is rigidly connected to the housing 530 of the reduction gear box 53. It can be understood that the bearing 55 and the housing 530 of the reduction gear box 53 are rigidly connected. The bearing 55 increases the axial limit of the screw 52. At the same time, the constraint of the bearing 55 on the screw 52 strengthens the axial guidance of the screw 52, ​​making the rotation of the end of the screw 52 away from the reduction gear box 53 more stable, thereby improving the stability of the fluid pushing.

[0094] In one embodiment, the outer side surface of one end of the screw rod 52 is fixedly connected to the inner side surface of the inner ring 551 of the bearing 55. In another embodiment, as shown in FIG8 , which is an enlarged view of the second drive assembly provided by the present application at point P in FIG4 , and / or the outer side surface of one end of the screw rod 52 has an annular flange 521 , the outer diameter R3 of the annular flange 521 being less than or equal to the outer diameter R2 of the inner ring 551 of the bearing 55 , and the annular flange 521 is fixedly connected to the end surface of the inner ring 551 of the bearing 55 away from the reduction gear box 53 , thereby increasing the axial support force with the bearing 55 . The screw 52 is fixedly connected to the bearing 55, which is rigidly connected to the housing 530 of the reduction gear 53. The force applied to the screw 52 is transmitted to the housing of the reduction gear 53 through the bearing 55. In this way, the transmission gear (not shown) inside the reduction gear 53 is no longer affected by the axial pressure of the screw 52. At the same time, the force applied to the screw 52 will not act on the motor 54, thereby increasing the upper limit of the force applied to the motor 54 and improving the life of the motor 54. The fixed connection methods in the above embodiments can all be achieved by welding or interference fit.

[0095] The embodiment of the present application provides an electronic atomization device including a drive assembly 5, wherein the drive assembly 5 includes a push rod 51, a screw 52, ​​a reduction gearbox 53, a motor 54 and a bearing 55. The screw 52 is threadedly connected to the push rod 51 for driving the push rod 51 to move axially; the reduction gearbox 53 is connected to the screw 52; the motor 54 is connected to the reduction gearbox 53 for providing rotational power to the screw 52 through the reduction gearbox 53; one end of the screw 52 passes through the bearing 55 and is transmission-connected to a gear (not shown) in the reduction gearbox 53. The bearing 55 is rigidly connected to the housing 530 of the reduction gearbox 53, and the inner ring 551 of the bearing 55 is fixedly connected to the screw 52. In this way, one end of the screw 52 is connected to the gear (not shown) in the reduction gear 53, the inner ring 551 of the bearing 55 is fixedly connected to the screw 52, ​​and the bearing 55 is rigidly connected to the housing 530 of the reduction gear 53. The reduction gear 53 and the bearing 55 increase the axial limit of the screw 52. At the same time, the bearing 55 strengthens the axial guidance of the screw 52, ​​so that the rotation of the end of the screw 52 away from the reduction gear 53 is more stable, thereby improving the liquid pushing stability.

[0096] In a specific embodiment, as shown in Figures 9-11, the push rod 51 and the screw rod 52 position relationship diagram of the drive assembly provided by this application are shown in Figures 9-11. Figure 9 is a schematic diagram before the push rod 51 moves, and Figure 10 is a schematic diagram after the push rod 51 moves relative to the screw rod 52. Figure 11 is a schematic diagram of the push rod 51 and the screw rod 52 position relationship diagram of the drive assembly provided by this application. As shown in Figure 11, the push rod 51 and the screw rod 52 are fixed by a concave-convex structure 58. More specifically, in this embodiment, the push rod 51 and the screw rod 52 are fixed after being encapsulated by the concave-convex structure 58, so that the push rod 51 moves linearly on the screw rod 52 (as shown in Figures 9-10). The push rod 51 is matched with the main frame bracket of the electronic atomization device so that the push rod cannot rotate. The push rod 51 and the screw rod 52 are fixed after being encapsulated by the concave-convex structure 58, so that the push rod 51 and the screw rod 52 are connected and fixed to each other, and the rotation of the motor 54 is converted into linear motion.

[0097] The above description is only an implementation method of the present application and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the description and drawings of this application, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A driving component, characterized in that Comprising: Push rod; Screw rod, which is threadedly connected to the push rod and is used to drive the push rod to move axially; Reduction gearbox, connected to the screw rod; Motor, connected to the reduction gearbox and used to provide rotational power to the screw rod through the reduction gearbox; Bearing, one end of the screw rod passes through the bearing and is in gear transmission connection with the gear inside the reduction gearbox; Wherein, the bearing is rigidly connected to the housing of the reduction gearbox, and the inner ring of the bearing is fixedly connected to the screw rod.

2. The drive assembly according to claim 1, wherein Further comprising: Pressure plate, which is rigidly connected to the housing of the reduction gearbox; The bearing is rigidly connected to the pressure plate, and one end of the screw rod passes through the bearing and the pressure plate.

3. The drive assembly according to claim 2, wherein The surface of the pressure plate away from the reduction gearbox has a groove, and the bottom of the groove has a through hole. The bearing is fixedly arranged in the groove, and one end of the screw rod passes through the bearing and the through hole.

4. The drive assembly according to claim 3, wherein The end face of the bearing away from the reduction gearbox is flush with the surface of the pressure plate away from the reduction gearbox, or the end face of the bearing away from the reduction gearbox is higher than the surface of the pressure plate away from the reduction gearbox.

5. The drive assembly according to claim 3, wherein The wall surface of the through hole is spaced from one end of the screw rod, and a seal is arranged between the wall surface of the through hole and the side surface of one end of the screw rod; The diameter of the through hole is greater than or equal to the outer diameter of the inner ring of the bearing and less than or equal to the inner diameter of the outer ring of the bearing.

6. An electronic atomization device, characterized in that, Comprising: Outer shell, having a receiving cavity; Liquid storage assembly, arranged in the receiving cavity; Atomization assembly, communicated with the liquid storage assembly; ​ 7. The electronic atomization device according to claim 6, wherein ​ 8. The electronic atomization device according to claim 6, wherein ​ 9. The electronic atomization device according to claim 6, wherein ​ ​ ​ 10. The electronic atomization device according to claim 9, wherein, ​ ​ The surface of the pressing plate away from the reduction gearbox has a groove, and the bottom of the groove has a through hole. The bearing is fixedly arranged in the groove, and one end of the screw rod passes through the bearing and the through hole.

12. The electronic atomization device according to claim 9, wherein the end face of the bearing away from the reduction gearbox is flush with the surface of the pressing plate away from the reduction gearbox, or the end face of the bearing away from the reduction gearbox is higher than the surface of the pressing plate away from the reduction gearbox.

13. The electronic atomization device according to claim 11, wherein the wall surface of the through hole is spaced from one end of the screw rod, and a seal is arranged between the wall surface of the through hole and the side surface of one end of the screw rod; the diameter of the through hole is greater than or equal to the outer diameter of the inner ring of the bearing and less than or equal to the inner diameter of the outer ring of the bearing.

14. The electronic atomization device according to claim 11, wherein the outer ring of the bearing is fixedly connected to the side wall of the groove, and / or the outer ring of the bearing is fixedly connected to the bottom wall of the groove; the outer side surface of one end of the screw rod is fixedly connected to the inner side surface of the inner ring of the bearing; and / or the outer side surface of one end of the screw rod has an annular flange, and the annular flange is fixedly connected to the end face of the inner ring of the bearing away from the reduction gearbox.

15. The electronic atomization device according to any one of claims 6-14, wherein the housing of the reduction gearbox includes an annular side wall and a top wall, and the pressing plate is fixedly connected to the top wall by bolts; the projection of the pressing plate on the motor covers the projection of the annular side wall on the motor.

16. The electronic atomization device according to claim 9, wherein the projection of the pressing plate on the motor overlaps with the projection of the reduction gearbox on the motor.

17. The electronic atomization device according to claim 6, wherein In the drive assembly, the diameter of the screw rod is 2 mm - 4 mm, the length of the screw rod is 24 mm - 48 mm, and the length of the screw rod is 2.5 to 3.5 times the diameter of the screw rod; the outer diameter of the bearing is 4 mm - 8 mm; and / or the size of the outer diameter of the bearing is 1.5 to 3 times the size of the diameter of the screw rod.

18. The electronic atomization device according to claim 6, characterized in that, Further comprising: a gas supply assembly for supplying gas to the atomization assembly; the atomization assembly is a two-phase flow atomization nozzle.

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