Actuators and transmission devices

Abstract

This utility model discloses an actuator and a transmission device, relating to the field of transmission device technology. The actuator includes a housing, a sun gear, at least one planetary gear, and a transmission assembly. The sun gear is located within the housing and is configured to be sleeved onto the output sleeve of a power source. Each planetary gear has a first gear and a second gear coaxially connected. The first gear meshes with the sun gear, and the number of teeth on the first gear is greater than the number of teeth on the second gear, while the number of teeth on the sun gear is less than the number of teeth on the first gear. The transmission assembly includes an input shaft assembly and an output shaft assembly located within the housing. The input shaft assembly meshes with the first gear, and the output shaft assembly meshes with the second gear. The sun gear can drive the first gear to revolve, thereby driving the first gear to revolve. The first gear drives the output shaft assembly to output torque, and the second gear drives the input shaft assembly to output torque.

Description

Technical Field

[0001] This utility model relates to the field of transmission device technology, and in particular to an actuator and a transmission device. Background Technology

[0002] With the continuous development of technology, various industries have placed higher expectations on the performance of transmission systems. In existing electronic actuator technology, planetary gears with a single number of teeth are difficult to adjust flexibly in terms of transmission ratio, resulting in low transmission efficiency and failing to meet the requirements of high-precision power control, thus affecting the overall performance of the equipment. Utility Model Content

[0003] The main purpose of this invention is to provide an actuator and transmission device that aims to solve the technical problem of low transmission efficiency of actuators in related technologies.

[0004] To achieve the above objectives, the present invention proposes an actuator, the actuator comprising:

[0005] case;

[0006] A sun gear, located within the housing, is configured to be sleeved onto the output sleeve of a power source;

[0007] At least one planetary gear, each of the planetary gears having a first gear and a second gear coaxially connected, the first gear meshing with the sun gear, the number of teeth of the first gear being greater than the number of teeth of the second gear, and the number of teeth of the sun gear being less than the number of teeth of the first gear;

[0008] A transmission assembly, comprising an input shaft assembly and an output shaft assembly disposed within the housing, wherein the input shaft assembly meshes with the first gear and the output shaft assembly meshes with the second gear;

[0009] The sun gear drives the first gear to revolve, which in turn drives the first gear to revolve, and the first gear drives the output shaft assembly to output torque, while the second gear drives the input shaft assembly to output torque.

[0010] In one embodiment, the number of teeth of the first gear is N, and the number of teeth of the second gear is N-1.

[0011] In one embodiment, the actuator further includes a stabilizing gear and three planetary gears, the stabilizing gear being located between the three planetary gears and coaxially arranged with the sun gear, the stabilizing gear meshing with the second gear of each of the planetary gears.

[0012] In one embodiment, the input shaft assembly includes an input sleeve, a base, and a first support member. The input sleeve is connected to the housing. An input gear ring is provided on the inner wall of the input sleeve facing the first gear. The input gear ring meshes with the first gear. The rotating shaft of the planetary gear passes through the first support member and abuts against the base.

[0013] In one embodiment, the input shaft assembly further includes a washer disposed on the base and abutting against the first support member.

[0014] In one embodiment, the housing has at least two fixing holes, and the actuator further includes at least two fasteners, each of which passes through one of the fixing holes, the input sleeve, and is fixed to the base in sequence.

[0015] In one embodiment, the output shaft assembly includes an output sleeve and a second support member. A portion of the structure of the output sleeve extends out of the housing. The second support member is located inside the output sleeve and is concentrically arranged with the output sleeve. An output gear ring is provided on the side of the output sleeve facing the second gear. The shaft of the planetary gear passes through the second support member.

[0016] In one embodiment, the output shaft assembly further includes a first bearing and a second bearing. The first bearing is rotatably disposed within the output sleeve and located between the output sleeve and the second support member. One end of the housing is provided with a limiting step, and the second bearing is sleeved on the outer wall of the output sleeve and limited within the limiting step.

[0017] In one embodiment, the output shaft assembly further includes a retaining ring, and the outer wall of the output sleeve has a groove, with the retaining ring positioned within the groove.

[0018] This utility model also proposes a transmission device, the transmission device comprising:

[0019] Drive components;

[0020] As described above, the actuator's sun gear is fitted onto the drive shaft of the drive member.

[0021] The technical solution of this utility model involves setting a first gear and a second gear coaxially connected on a planetary gear. The first gear meshes with the sun gear, and the second gear meshes with the output shaft assembly. Specifically, the sun gear is sleeved on the power source output sleeve as the driving element, which can effectively transmit power to the first gear of the planetary gear meshing with it. The first gear's revolution drives the second gear's revolution. The first gear of each planetary gear meshes with the sun gear and the input shaft assembly, and the second gear meshes with the output shaft assembly, forming a composite transmission structure of "sun gear - first gear of planetary gear - second gear of planetary gear - input shaft assembly / output shaft assembly". When the power source starts, the sun gear rotates with the drive shaft of the power source, driving the planetary gears to rotate and revolve simultaneously. Since the number of teeth on the sun gear is less than the number of teeth on the first gear, a first-stage reduction is achieved through the first gear meshing with the input internal gear ring. Since the number of teeth on the first gear is greater than the number of teeth on the second gear, a second-stage reduction is achieved through the second gear meshing with the output internal gear ring. This achieves the superposition of the two-stage reduction ratios, and then outputs torque through the input shaft assembly and the output shaft assembly. By employing a two-stage reduction ratio superposition method, the output torque of the power source is amplified after two reduction cycles. This design not only improves torque output but also reduces the gear size and strength requirements of a single-stage reduction by rationally allocating the reduction ratio, further improving transmission efficiency. The aforementioned two-stage reduction ratio superposition design significantly enhances torque output capability, solving the problem of insufficient torque in traditional actuators and meeting high-torque demand scenarios; this not only improves transmission efficiency but also ensures the stability and reliability of torque output. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0023] Figure 1 A schematic diagram of the actuator provided by this utility model;

[0024] Figure 2 Exploded view of the actuator provided by this utility model;

[0025] Figure 3 A schematic diagram of the sun gear, planetary gears and stabilizing gear provided by this utility model;

[0026] Figure 4 A cross-sectional structural diagram of the actuator provided by this utility model.

[0027] Explanation of icon numbers:

[0028] 1000. Actuator; 1. Housing; 11. Limiting step; 12. Fixing hole; 2. Sun gear; 3. Planetary gear; 31. First gear; 32. Second gear; 4. Transmission assembly; 41. Input shaft assembly; 411. Input sleeve; 412. Base; 413. First support member; 414. Washer; 42. Output shaft assembly; 421. Output sleeve; 422. Second support member; 423. First bearing; 424. Second bearing; 425. Snap ring; 5. Stabilizing gear.

[0029] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0032] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0033] This utility model proposes an actuator 1000.

[0034] Please see Figure 1 and Figure 2In one embodiment of this utility model, the actuator 1000 includes a housing 1, a sun gear 2, at least one planetary gear 3, and a transmission assembly 4. The sun gear 2 is located inside the housing 1 and is configured to be sleeved on the output sleeve 421 of the power source. Each planetary gear 3 has a first gear 31 and a second gear 32 coaxially connected. The first gear 31 meshes with the sun gear 2, and the number of teeth of the first gear 31 is greater than the number of teeth of the second gear 32. The number of teeth of the sun gear 2 is less than the number of teeth of the first gear 31. The transmission assembly 4 includes an input shaft assembly 41 and an output shaft assembly 42 disposed inside the housing 1. The input shaft assembly 41 meshes with the first gear 31, and the output shaft assembly 42 meshes with the second gear 32. The sun gear 2 can drive the first gear 31 to revolve, thereby driving the first gear 31 to revolve. The first gear 31 drives the output shaft assembly 42 to output torque, and the second gear 32 drives the input shaft assembly 41 to output torque.

[0035] In this embodiment, the actuator 1000 can be applied to scenarios such as car backrest tables and electric small tables. The following explanation uses a car backrest table as an example; it can be used to realize the lifting or tilting function of the small table and can be installed at the bottom of the small table or within the supporting structure. Further details are omitted here. Figure 2 It should be noted that the housing 1 is used for protection and support. It is understood that the housing 1 has positioning holes for connection to the car backrest table via bolts or rivets, thereby positioning and fixing the housing 1 to prevent it from rotating along with the output shaft assembly 42 of the transmission component 4. The sun gear 2, as the driving element, is connected to an external power source, receives power, and begins to rotate. It is sleeved on the drive shaft of the power source and, through meshing with the first gear 31 of the planetary gear 3, drives the planetary gear 3 to rotate and revolve. The planetary gear 3 has a first gear 31 and a second gear 32 coaxially connected, which can be integrated together by a single molding process. It is understandable that, along the direction from the input shaft assembly 41 to the output shaft assembly 42, the first gear 31 is located at the end closer to the input shaft assembly 41, and the second gear 32 is located at the end closer to the output shaft assembly 42. The first gear 31 of the planetary gear 3 meshes with the sun gear 2, serving as the first stage of gear transmission. Driven by the sun gear 2, the first gear 31 revolves around the sun gear 2. The second gear 32 rotates along with the first gear 31, serving as the second stage of gear transmission. The second gear 32 meshes with the output shaft assembly 42. It should be noted that, in order to improve transmission efficiency, combined with... Figure 3 Three planetary gears 3 are set up, all of which revolve around the sun gear 2. The three planetary gears 3 can distribute the load, reduce the stress on each planetary gear 3, and thus improve the transmission efficiency of the entire actuator 1000.

[0036] The technical solution of this utility model involves setting a first gear 31 and a second gear 32 coaxially connected on a planetary gear 3. The first gear 31 meshes with the sun gear 2, and the second gear 32 meshes with the output shaft assembly 42. Specifically, the sun gear 2 is sleeved on the power source output sleeve 421 as the driving element, which can effectively transmit power to the first gear 31 of the planetary gear 3 that meshes with it. The revolution of the first gear 31 drives the revolution of the second gear 32. The first gear 31 of each planetary gear 3 meshes with the sun gear 2 and the input shaft assembly 41, and the second gear 32 meshes with the output shaft assembly 42, forming a composite transmission structure of "sun gear 2 - first gear 31 of planetary gear 3 - second gear 32 of planetary gear 3 - input shaft assembly 41 / output shaft assembly 42". When the power source starts, the sun gear 2 rotates along with the drive shaft of the power source, driving the planetary gear 3 to rotate and revolve simultaneously. Since the number of teeth on the sun gear 2 is less than the number of teeth on the first gear 31, the first gear 31 meshes with the input internal gear ring to achieve first-stage reduction. Since the number of teeth on the first gear 31 is greater than the number of teeth on the second gear 32, the second gear 32 meshes with the output internal gear ring to achieve second-stage reduction. This achieves the superposition of the two-stage reduction ratios, which in turn output torque through the input shaft assembly 41 and the output shaft assembly 42. By using a two-stage reduction ratio superposition method, the output torque of the power source is amplified after two reductions. This design not only improves torque output but also reduces the gear size and strength requirements of a single-stage reduction by rationally allocating the reduction ratios, further improving transmission efficiency. The above-mentioned design of superimposing the two-stage reduction ratios significantly improves torque output capability, solves the problem of insufficient torque of traditional actuators (1000 Nm), and meets the needs of high-torque scenarios. This not only improves transmission efficiency but also ensures the stability and reliability of torque output.

[0037] In one embodiment of this utility model, the first gear 31 has N teeth, the second gear 32 has N-1 teeth, and the sun gear 2 has N-1 teeth.

[0038] In this embodiment, it should be noted that, in order to further reduce the output rotational speed and increase the torque output, the rotation of the sun gear 2 drives the first gear 31 meshing with it to rotate. Since the number of teeth on the sun gear 2 is less than the number of teeth on the first gear 31, the rotational speed of the sun gear 2 will be higher than the rotational speed of the first gear 31, thus achieving the first stage of speed reduction. Because the first gear 31 of the planetary gear 3 has more teeth than the second gear 32, when the first gear 31 revolves, the meshing of the second gear 32 with the output shaft assembly 42 will further reduce the output rotational speed, i.e., achieve the second stage of speed reduction. According to the basic principle of gear transmission, as the rotational speed decreases, the torque will increase accordingly. Through the meshing of the second gear 32 of the planetary gear 3 with the output shaft assembly 42, the output rotational speed is further reduced while the output torque is increased. Figure 3It is understandable that the number of teeth on the sun gear 2 is less than the number of teeth on the first gear 31, and the number of teeth on the second gear 32 is greater than the number of teeth on the first gear 31. When the number of teeth on the first gear 31 is N, that is, the number of teeth on the sun gear 2 is N, and the number of teeth on the second gear 32 is N-1. Assuming the number of teeth on the first gear 31 of the planetary gear 3 is 13, the number of teeth on the sun gear 2 is also 12, and the number of teeth on the second gear 32 of the planetary gear 3 is 12, and the ring gear of the input shaft assembly 41 meshing with the first gear 31 is 39, here the ring gear of the input shaft assembly 41 is equal to the product of the number of planetary gears 3 and the number of teeth on the first gear 31. The formula for the first transmission ratio here is: (ring gear of input shaft assembly 41 / number of teeth on sun gear 2) + 1, that is, the first transmission ratio is... The output shaft assembly 42, which meshes with the second gear 32, has a gear ring of 38 teeth. The difference between the gear rings of the input shaft assembly 41 and the output shaft assembly 42 is 1. The difference between the number of teeth of the first gear 31 and the second gear 32 is also 1. According to the formula for the second transmission ratio: gear ring of output shaft assembly 42 / (difference between the gear rings of the input shaft assembly 41 and the output shaft assembly 42 + difference between the number of teeth of the first gear 31 and the second gear 32), the second transmission ratio is: That is, the total transmission ratio is the product of the first transmission ratio and the second transmission ratio, i.e., 19 * 4.25 = 80.75.

[0039] In one embodiment of the present invention, the actuator 1000 further includes a stabilizing gear 5 and three planetary gears 3. The stabilizing gear 5 is located between the three planetary gears 3 and is coaxially arranged with the sun gear 2. The stabilizing gear 5 meshes with the second gear 32 of each planetary gear 3.

[0040] In this embodiment, it should be noted that, in conjunction with Figure 3 To further stabilize and enhance the rigidity of the three planetary gears 3 during operation, a stabilizing gear 5 is positioned between the three planetary gears 3, coaxially with the sun gear 2, along the direction from the input shaft assembly 41 to the output shaft assembly 42, with the input shaft assembly 41 below and the output shaft assembly 42 above, i.e., the stabilizing gear 5 is positioned above the sun gear 2. This reduces the possibility of angular misalignment or displacement of the planetary gears 3 during operation due to uneven load or manufacturing errors. The aforementioned arrangement of three planetary gears 3 significantly improves transmission efficiency.

[0041] In one embodiment of the present invention, the input shaft assembly 41 includes an input sleeve 411, a base 412 and a first support member 413. The input sleeve 411 is connected to the housing 1. An input gear ring is provided on the inner wall of the side of the input sleeve 411 facing the first gear 31. The input gear ring meshes with the first gear 31. The rotating shaft of the planetary gear 3 passes through the first support member 413 and abuts against the base 412.

[0042] In this embodiment, combined with Figure 2 and Figure 4 The input sleeve 411 is rotatably mounted inside the housing 1. The input sleeve 411 and the housing 1 can be connected by bolts, snap-fits, or other methods, which are not limited here. An input gear ring is provided on the inner wall of the side of the input sleeve 411 facing the first gear 31. The input gear ring meshes with the first gear 31. The number of gears in the input gear ring is related to the number of planetary gears 3 and the number of teeth in the first gear 31. Here, when three planetary gears 3 are used, the first gear 31 has 13 teeth, and the input gear ring has 13*3=39 gears. The meshing of the input gear ring with the first gear 31 provides stable power to the input sleeve 411, enabling it to rotate. The base 412 provides support for the entire actuator 1000. The base 412 does not rotate relative to the housing 1. The base 412 has at least two first through holes. When the actuator 1000 is used with other structures, it can be fixed to other structures by bolts, screws, or other fasteners passing through the first through holes, thereby ensuring a stable connection between the actuator 1000 and other structures. Figure 2 The first support member 413 is similar to a plate structure. The first support member 413 has a second through hole. The rotating shaft of the planetary gear 3 passes through the first support member 413, that is, it abuts against the base 412 through the second through hole. This ensures that the planetary gear 3 is in the predetermined position and prevents the planetary gear 3 from disengaging during operation.

[0043] In one embodiment of the present invention, the input shaft assembly 41 further includes a washer 414, which is disposed on the base 412 and abuts against the first support member 413.

[0044] In this embodiment, to reduce wear and friction between the first support member 413 and the base 412, a washer 414 is provided to buffer and dampen vibrations, thereby reducing vibration and impact during operation. It is understood that in one embodiment, the base 412 has a groove into which the washer 414 is accommodated. The first support member 413 has a protrusion on the side facing the base 412, and the washer 414 has an opening in the center. The protrusion tightly abuts against the inner circumference of the washer 414, and the washer 414 is fixed by the pressure of the first support member 413. In another embodiment, the washer 414 can be attached to the base 412 by adhesive bonding, and further fixed by the pressure of the first support member 413. The material of the washer 414 includes, but is not limited to, metallic and non-metallic materials, such as rubber, silicone, polytetrafluoroethylene, and carbon steel, etc., and is not limited here.

[0045] In one embodiment of the present invention, the housing 1 has at least two fixing holes 12, and the actuator 1000 also includes at least two fasteners, each fastener passing through a fixing hole 12, an input sleeve 411 and a base 412 in sequence for fixing.

[0046] In this embodiment, combined with Figure 2 and Figure 4 It should be noted that one end of the housing 1 extends to form at least two first connecting sections, each with a fixing hole 12. The end of the input sleeve 411 away from the planetary gear 3 extends to form at least two second connecting sections. The base 412 has a groove along its circumference. The first connecting sections of the housing 1 are inserted into the grooves and connected and fixed to the base 412 by fasteners such as bolts and rivets passing through the fixing holes 12 and the second connecting sections of the input sleeve 411. It is understood that the number of fixing holes 12 is not limited, as long as it ensures a fixed connection between the housing 1, the input sleeve 411, and the base 412. The types of fasteners include, but are not limited to, bolts and screws. Figure 2 The housing 1 has four fixing holes 12, which are spaced apart. Each fixing hole 12 is fixed to the input sleeve 411 and the base 412 by a fastener.

[0047] In one embodiment of the present invention, the output shaft assembly 42 includes an output sleeve 421 and a second support member 422. A portion of the structure of the output sleeve 421 extends out of the housing 1. The second support member 422 is located inside the output sleeve 421 and is concentrically arranged with the output sleeve 421. An output gear ring is provided on the side of the output sleeve 421 facing the second gear 32. The rotating shaft of the planetary gear 3 passes through the second support member 422.

[0048] In this embodiment, combined with Figure 2 and Figure 4It should be noted that the output sleeve 421 is rotatably disposed within the housing 1. The output sleeve 421 is the core output component of the entire actuator 1000. There is a gap between the outer wall of the output sleeve 421 and the inner wall of the housing 1 to ensure that the output sleeve 421 can rotate smoothly and without jamming, meshing with the second gear 32 of the planetary gear 3 to transmit power. The output gear ring meshes with the second gear 32, and the number of teeth on the output gear ring is less than 1 compared to the number of teeth on the input gear ring, with the output gear ring having 38 teeth. The second support member 422 is similar to a plate-like structure, and the planetary shafts of the planetary gear 3 all pass through the second support member 422. The second support member 422 and the first support member 413 together support the entire planetary gear 3 and the stabilizing gear 5. The second support member 422 and the output sleeve 421 are concentrically arranged to ensure precise alignment between them, reducing vibration and offset during operation. Understandably, when there are three planetary gears 3, the planetary shafts of the three planetary gears 3 pass through the second support member 422 and are arranged in a triangular configuration. The side of the second support member 422 facing away from the planetary gears 3 forms multiple stepped protrusions, each concentrically arranged, with the area of ​​each protrusion gradually decreasing along the direction from the input shaft assembly 41 to the output shaft assembly 42. This arrangement provides stable support, ensuring that the planetary gears 3 do not shift or vibrate during operation. This reduces wear on the planetary gears 3, extends their service life, and also improves the symmetry and stability of the system.

[0049] In one embodiment of the present invention, the output shaft assembly 42 further includes a first bearing 423 and a second bearing 424. The first bearing 423 is rotatably disposed inside the output sleeve 421 and is located between the output sleeve 421 and the second support member 422. One end of the housing 1 is provided with a limiting step 11. The second bearing 424 is sleeved on the outer wall of the output sleeve 421 and is limited within the limiting step 11.

[0050] In this embodiment, combined with Figure 2It should be noted that the first bearing 423 is installed inside the output sleeve 421, located between the output sleeve 421 and the second support member 422. The first bearing 423 is sleeved on the second support member 422 to avoid direct contact between the second support member 422 and the output sleeve 421, thus reducing friction. The second bearing 424 is installed inside the limiting step 11 of the housing 1 and sleeved on the outer wall of the output sleeve 421, ensuring that the sliding friction between the part of the output sleeve 421 extending out of the housing 1 and other structures is converted into rolling friction, thereby reducing energy loss and improving mechanical efficiency. The second bearing 424 is used to fix the part of the output sleeve 421 extending out of the housing 1, thereby ensuring smooth operation. It is understood that one end of the housing 1 is provided with a limiting step 11, that is, in the form of a groove. The second bearing 424 is sleeved on the outer wall of the output sleeve 421 and abuts against the step surface of the limiting step 11. The size of the second bearing 424 is adapted to the depth of the limiting step 11 opened in the housing 1, so as to ensure that the side of the second bearing 424 facing away from the first bearing 423 is flush with the surface of the housing 1.

[0051] In one embodiment of the present invention, the output shaft assembly 42 further includes a retaining ring 425. The outer wall of the output sleeve 421 is provided with a groove, the retaining ring 425 is limited in the groove and abuts against the second bearing 424.

[0052] In this embodiment, to prevent the gear ring of the output sleeve 421 from detaching from the second bearing 424 during operation, a retaining ring 425 is provided to abut against the second bearing 424, restricting the axial movement of the output sleeve 421 and ensuring that the output sleeve 421 remains stable during operation. Figure 4 The outer wall of the output sleeve 421 has an annular groove along its circumference. The retaining spring 425 is sleeved on the output sleeve 421 and confined within the annular groove. It is understood that the depth and width of the annular groove are adapted to the dimensions of the retaining spring 425. The material of the retaining spring 425 includes, but is not limited to, spring steel, stainless steel, etc., and is not specified here.

[0053] This utility model also proposes a transmission device, which includes the actuator 1000 and the driving component described above. The specific structure of the actuator 1000 is as described in the above embodiments. Since this transmission device adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, and will not be described in detail here. The sun gear 2 of the actuator 1000 is sleeved on the driving end of the driving component. The driving component is in the form of a drive motor, including but not limited to stepper motors, servo motors, etc. The driving end of the drive motor is sleeved on the sun gear 2 of the actuator 1000, so that under the drive of the drive motor, the sun gear 2 is driven to rotate, thereby driving the first gear 31 and the second gear 32 of the planetary gear 3 to rotate, thereby realizing the torque output of the output shaft assembly 42 and the input shaft assembly 41. It is understood that, in order to prevent the housing 1 of the actuator 1000 from rotating with the rotation of the output shaft assembly 42, positioning holes are provided on opposite sides of the housing 1 of the actuator 1000, which can be fixed in the transmission device by fasteners such as bolts or screws passing through the positioning holes. The types of transmission devices include, but are not limited to, car seat adjustment devices, electric tray tables, etc., and are not limited here.

[0054] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. An actuator, characterized by The actuator includes: case; A sun gear, located within the housing, is configured to be sleeved onto the output sleeve of a power source; At least one planetary gear, each of the planetary gears having a first gear and a second gear coaxially connected, the first gear meshing with the sun gear, the number of teeth of the first gear being greater than the number of teeth of the second gear, and the number of teeth of the sun gear being less than the number of teeth of the first gear; A transmission assembly, comprising an input shaft assembly and an output shaft assembly disposed within the housing, wherein the input shaft assembly meshes with the first gear and the output shaft assembly meshes with the second gear; The sun gear drives the first gear to revolve, which in turn drives the first gear to revolve, and the first gear drives the output shaft assembly to output torque, while the second gear drives the input shaft assembly to output torque.

2. The actuator of claim 1, wherein The first gear has N teeth, the second gear has N-1 teeth, and the second gear has N-1 teeth.

3. The actuator of claim 1, wherein The actuator also includes a stabilizing gear and three planetary gears. The stabilizing gear is located between the three planetary gears and is coaxially arranged with the sun gear. The stabilizing gear meshes with the second gear of each of the planetary gears.

4. The actuator of any one of claims 1 to 3, wherein, The input shaft assembly includes an input sleeve, a base, and a first support member. The input sleeve is connected to the housing. An input gear ring is provided on the inner wall of the input sleeve facing the first gear. The input gear ring meshes with the first gear. The rotating shaft of the planetary gear passes through the first support member and abuts against the base.

5. The actuator of claim 4, wherein, The input shaft assembly also includes a washer disposed on the base and abutting against the first support member.

6. The actuator of claim 5, wherein, The housing has at least two fixing holes, and the actuator also includes at least two fasteners, each of which passes through one of the fixing holes, the input sleeve, and is fixed to the base in sequence.

7. The actuator of any one of claims 1 to 3, wherein, The output shaft assembly includes an output sleeve and a second support member. A portion of the structure of the output sleeve extends out of the housing. The second support member is located inside the output sleeve and is concentrically arranged with the output sleeve. An output gear ring is provided on the side of the output sleeve facing the second gear. The shaft of the planetary gear passes through the second support member.

8. The actuator of claim 7, wherein, The output shaft assembly further includes a first bearing and a second bearing. The first bearing is rotatably disposed inside the output sleeve and located between the output sleeve and the second support member. One end of the housing is provided with a limiting step, and the second bearing is sleeved on the outer wall of the output sleeve and limited within the limiting step.

9. The actuator of claim 8, wherein, The output shaft assembly also includes a retaining ring, and the outer wall of the output sleeve has a groove, with the retaining ring positioned within the groove.

10. A transmission characterized by, The transmission device includes: Drive components; The actuator according to any one of claims 1 to 9, wherein the sun gear of the actuator is sleeved on the drive shaft of the drive member.

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