A micro retractable landing gear

Abstract

The utility model discloses a micro retractable landing gear, including casing, integrated drive transmission subassembly, sliding block and landing gear body. Integrated drive transmission subassembly includes support, driver, multistage gear pair and lead screw, and driver installs in support, and multistage gear pair installs in support, and lead screw rotation is connected in support, and the output of driver is connected with the input of multistage gear pair, and the output of multistage gear pair is connected with lead screw. Support installs in casing, and sliding block is slidably connected in casing and the sliding direction is with the axial parallel of lead screw, and lead screw is set sliding block and is connected with its screw thread. Landing gear body rotation is connected in casing, and the cooperation department corresponding with sliding block is equipped on landing gear, and sliding block and cooperation department are configured as sliding block sliding in the process through cooperation department drive landing gear body rotation. The setting of integrated drive transmission subassembly makes the precision and efficiency of transmission higher, and the precision requirement of low cooperation casing is low, can reduce development cost.

Description

Technical Field

[0001] This utility model belongs to the field of model aircraft technology, and in particular relates to a miniature retractable landing gear. Background Technology

[0002] In applications such as recreational use for model aircraft enthusiasts, aviation education demonstrations, and film and television prop simulations, realistic remote-controlled fixed-wing model aircraft require the replication of the takeoff and landing functions and aerodynamic characteristics of real aircraft, making their retractable landing gear structure a core component. This structure needs to retract the landing gear after takeoff to reduce wind resistance and ensure flight attitude stability, and lower the landing gear before landing to achieve stable support. Therefore, it places high demands on the reliability, power matching, and structural compactness of the transmission system in the retractable landing gear structure.

[0003] Many existing remote-controlled fixed-wing model aircraft use a two-stage gear transmission system for their landing gear retraction and extension, which is directly assembled into the plastic or metal shell (i.e., each component is mounted separately on the shell). However, due to poor fit between the plastic parts and the gears, and loose screws securing the shell, transmission problems such as gear slippage can easily occur during gear transmission. Utility Model Content

[0004] To address the aforementioned problems, this utility model provides a miniature retractable landing gear, comprising a housing, an integrated drive transmission assembly, a slider, and a landing gear body; The integrated drive transmission assembly includes a bracket, a driver, a multi-stage gear pair, and a lead screw. The driver is mounted on the bracket, the multi-stage gear pair is mounted on the bracket, the lead screw is rotatably connected to the bracket, the output end of the driver is connected to the input end of the multi-stage gear pair, and the output end of the multi-stage gear pair is connected to the lead screw. The bracket is mounted on the housing, the slider is slidably connected to the housing and the sliding direction is parallel to the axis of the lead screw; the lead screw passes through the slider and is threadedly connected to it; The landing gear body is rotatably connected to the housing. The landing gear is provided with a mating part corresponding to the slider. The slider and the mating part are configured such that the landing gear body is driven to rotate through the mating part during the sliding of the slider.

[0005] In one embodiment of the miniature retractable landing gear, the support includes at least two mounting plates arranged side by side at intervals; one of the two outermost mounting plates in the support is a drive mounting plate and the other is a lead screw mounting plate. The drive mounting plate is connected to the driver, and the lead screw mounting plate is connected to the lead screw. The driver and the lead screw are located on both sides of the support.

[0006] In a certain embodiment of the miniature retractable landing gear, the driver is a motor, which is fixedly mounted on the first side of the drive mounting plate. The output shaft of the motor passes through the drive mounting plate and is rotatably connected to it. Furthermore, the output shaft of the motor passes from the first side of the drive mounting plate to the second side of the drive mounting plate and is connected to the input end of the multi-stage gear pair on the second side of the drive mounting plate.

[0007] In a miniature retractable landing gear provided in one embodiment, the lead screw is fixedly installed on the second side of the lead screw mounting plate, one end of the lead screw passes through the lead screw mounting plate and is rotatably connected thereto; and the lead screw passes from the second side of the lead screw mounting plate to the first side of the lead screw mounting plate, and is connected to the output end of the multi-stage gear pair on the first side of the lead screw mounting plate.

[0008] In one embodiment of the miniature retractable landing gear, the number of stages of the multi-stage gear pair is greater than or equal to three.

[0009] In one embodiment of the miniature retractable landing gear, the multi-stage gear pair includes a first driving gear, a first driven gear, a second driving gear, a second driven gear, a third driving gear, a third driven gear, a fourth driving gear, and a fourth driven gear; The bracket includes three mounting plates: a drive mounting plate, a middle mounting plate, and a lead screw mounting plate; the mounting plates are fixedly connected to each other by connecting columns. The driver is mounted on the first side of the driver mounting plate, and the output end of the driver passes through the driver mounting plate to the second side of the driver mounting plate and is connected to the first drive gear. The intermediate mounting plate has a notch, and the first rotating shaft is located at the notch and its two ends are respectively rotatably connected to the drive mounting plate and the lead screw mounting plate; the first rotating shaft is respectively fixed with the first driven gear and the second driving gear, and the first driven gear meshes with the first driving gear. The second side of the intermediate mounting plate is rotatably connected to a second rotating shaft, and the second driven gear and the third driving gear are respectively fixedly connected to the second rotating shaft, with the second driven gear and the second driving gear meshing. The two ends of the third rotating shaft are rotatably connected to the intermediate mounting plate and the lead screw mounting plate, respectively. The third driven gear and the fourth driving gear are fixedly connected to the third rotating shaft, and the third driven gear and the third driving gear mesh. The lead screw is located on the second side of the lead screw mounting plate. One end of the lead screw passes through the lead screw mounting plate and is connected to the fourth driven gear on the first side of the lead screw mounting plate. The fourth driven gear meshes with the fourth driving gear.

[0010] In a miniature retractable landing gear provided in one embodiment, a first receiving groove is provided in the housing, and the bracket is installed in the first receiving groove; the first receiving groove has a first limiting surface and a second limiting surface arranged opposite to each other, the surface of the drive mounting plate facing the drive driver abuts against the first limiting surface, and the surface of the lead screw mounting plate facing the lead screw abuts against the second limiting surface.

[0011] In a certain embodiment of the miniature retractable landing gear, the driver is a motor; the housing is also provided with a second receiving slot, and the motor is installed in the second receiving slot; the second receiving slot is connected to the first receiving slot; the second receiving slot is provided with a third limiting surface facing the first receiving slot, and the end face of the motor on the side away from the drive mounting plate abuts against the third limiting surface.

[0012] In one embodiment of the miniature retractable landing gear, the housing is provided with a groove, and the slider extends into the groove and is slidably connected thereto.

[0013] In one embodiment of the miniature retractable landing gear, the mating part is a mating groove provided on the landing gear body, and a portion of the slider extends into the mating groove.

[0014] Because of the adoption of the above technical solution, this utility model has the following advantages and positive effects compared with the prior art: The miniature retractable landing gear provided by this utility model has a driver, multi-stage gear pair and lead screw all mounted on the bracket to form an integrated drive transmission assembly, which is then mounted on the housing. Therefore, the transmission accuracy and efficiency are higher, and the accuracy requirements of the mating housing are lower, which can reduce development costs. Attached Figure Description

[0015] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of the invention.

[0016] Figure 1 and Figure 2 This is a schematic diagram of the structure of a miniature retractable landing gear according to the present invention; Figure 3 This is a cross-sectional schematic diagram of a miniature retractable landing gear according to the present invention; Figure 4 and Figure 5 This is a structural schematic diagram of a bracket and a multi-stage gear pair according to the present invention; Figure 6 This is a partial limiting diagram of the bracket, motor and housing according to the present invention; Figure 7 This is a schematic diagram of the structure of a landing gear body according to the present invention.

[0017] Explanation of reference numerals in the attached figures: 1: Left shell; 2: Right shell; 3: Bracket; 4: Motor; 5: Lead screw; 6: Slider; 7: Landing gear body; 8: Drive mounting plate; 9: Intermediate mounting plate; 10: Lead screw mounting plate; 11: First drive gear; 12: First driven gear; 13: Second drive gear; 14: Second driven gear; 15: Third drive gear; 16: Third driven gear; 17: Fourth drive gear; 18: Fourth driven gear; 19: Connecting column; 20: Mating groove; 21: First limiting surface; 22: Second limiting surface; 23: Third limiting surface; 24: First receiving groove; 25: Rotating shaft. Detailed Implementation

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the specific implementation methods of this utility model will be described below with reference to the accompanying drawings. Obviously, the drawings described below are merely some embodiments of this utility model. For those skilled in the art, other drawings and other implementation methods can be obtained based on these drawings without any creative effort.

[0019] To keep the drawings concise, only the parts relevant to this invention are shown schematically in each figure, and they do not represent the actual structure of the product. Furthermore, for ease of understanding, in some figures, only one of the components with the same structure or function is schematically depicted, or only one is labeled. In this document, "one" not only means "only one," but can also mean "more than one."

[0020] In the description of this utility model, the term "a" not only means "only one" but can also mean "more than one". The terms "first", "second", "third", etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance. The terms "perpendicular" and "parallel" do not mean absolutely perpendicular or parallel, but can be approximately perpendicular or approximately parallel.

[0021] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0022] See Figures 1 to 7 This embodiment provides a miniature retractable landing gear, including a housing, an integrated drive transmission assembly, a slider 6, and a landing gear body 7.

[0023] The integrated drive transmission assembly includes a bracket 3, a driver, a multi-stage gear pair, and a lead screw 5. The driver is mounted on the bracket 3, the multi-stage gear pair is mounted on the bracket 3, the lead screw 5 is rotatably connected to the bracket 3, the output end of the driver is connected to the input end of the multi-stage gear pair, and the output end of the multi-stage gear pair is connected to the lead screw 5.

[0024] Specifically, the bracket 3 includes three mounting plates arranged side by side at intervals: a drive mounting plate 8, a middle mounting plate 9, and a lead screw mounting plate 10. The drive mounting plate 8 and the lead screw mounting plate 10 are located on both sides, and the middle mounting plate 9 is located between the drive mounting plate 8 and the lead screw mounting plate 10. The bracket 3 also includes several connecting posts 19, through which the three mounting plates are fixed in relative positions.

[0025] The multi-stage gear pair has three or more stages. In this embodiment, the multi-stage gear pair includes a first driving gear 11, a first driven gear 12, a second driving gear 13, a second driven gear 14, a third driving gear 15, a third driven gear 16, a fourth driving gear 17, and a fourth driven gear 18. The bracket 3 also includes a first rotating shaft, a second rotating shaft, and a third rotating shaft, which are used for mounting the gears in the multi-stage gear pair.

[0026] The driver and the lead screw 5 are located on both sides of the bracket 3, wherein the driver can be a motor 4. The main body of the motor 4 is located on the first side of the drive mounting plate 8, the second side of the drive mounting plate 8 faces the first side of the intermediate mounting plate 9, the second side of the intermediate mounting plate 9 faces the first side of the lead screw mounting plate 10, and the main body of the lead screw 5 is mounted on the second side of the lead screw mounting plate 10.

[0027] More specifically, the motor 4 is fixedly mounted on the first side of the drive mounting plate 8, the output shaft of the motor 4 passes through the drive mounting plate 8 and is rotatably connected to it, and the output shaft of the motor 4 passes from the first side of the drive mounting plate 8 to the second side of the drive mounting plate 8, and is fixedly connected to the input end of the multi-stage gear pair on the second side of the drive mounting plate 8, which is the first driving gear 11.

[0028] The intermediate mounting plate 9 has a notch, and the first rotating shaft is located at the notch, with its two ends rotatably connected to the drive mounting plate 8 and the lead screw mounting plate 5, respectively. A first driven gear 12 and a second driving gear 13 are fixed on the first rotating shaft, with the second driving gear 13 located at the notch. The first driven gear 12 meshes with the first driving gear 11.

[0029] A second rotating shaft is rotatably connected to the second side of the intermediate mounting plate 9, and the second driven gear 14 and the third driving gear 15 are respectively fixedly connected to the second rotating shaft. The second driven gear 14 meshes with the second driving gear 13.

[0030] The two ends of the third rotating shaft are rotatably connected to the intermediate mounting plate 9 and the lead screw mounting plate 10, respectively. The third driven gear 16 and the fourth driving gear 17 are fixedly connected to the third rotating shaft. The third driven gear 16 and the third driving gear 15 mesh.

[0031] The lead screw 5 is fixedly installed on the second side of the lead screw mounting plate 10. One end of the lead screw 5 passes through the lead screw mounting plate 10 and is rotatably connected to it. Furthermore, the lead screw 5 extends from the second side of the lead screw mounting plate 10 to the first side of the lead screw mounting plate 10, and is fixedly connected to the output end of the multi-stage gear pair on the first side of the lead screw mounting plate 10. The output end of the multi-stage gear pair is the fourth driven gear 18. The fourth driven gear 18 meshes with the fourth driving gear 17.

[0032] Thus, when motor 4 rotates, it can drive lead screw 5 to rotate through multi-stage gear pairs.

[0033] The housing includes a left shell 1 and a right shell 2, which are fixedly connected by screws or other means. An integrated drive transmission assembly is installed inside the housing. Specifically, the housing has a first receiving groove 24 (a first groove is provided on the left shell 1, and a second groove is provided on the right shell 2; the first groove and the second groove cooperate to form the first receiving groove 24), and the bracket 3 is installed in the first receiving groove 24. The first receiving groove 24 has a first limiting surface 21 and a second limiting surface 22 that are arranged opposite to each other. The surface of the drive mounting plate 8 facing the driver side (i.e., the first side surface of the drive mounting plate 8) abuts against the first limiting surface 21, and the surface of the lead screw mounting plate 10 facing the lead screw 5 side (i.e., the second side surface of the lead screw mounting plate 10) abuts against the second limiting surface 22.

[0034] The housing also has a second receiving groove (a third groove is provided on the left shell 1, and a fourth groove is provided on the right shell 2; the third groove and the fourth groove cooperate to form the second receiving groove), and the motor 4 is installed in the second receiving groove; and the second receiving groove is connected to the first receiving groove 24. The second receiving groove has a third limiting surface 23 facing the first receiving groove 24, and the end face of the motor 4 on the side away from the drive mounting plate 8 abuts against the third limiting surface 23.

[0035] The slider 6 is slidably connected to the housing and its sliding direction is parallel to the axis of the lead screw 5. Specifically, the housing may have a groove, into which the slider 6 extends and is slidably connected. Alternatively, the left housing 1 and the right housing 2 may each have a groove, and both ends of the slider 6 may extend into the grooves on the left housing 1 and the right housing 2 respectively and be slidably connected to the corresponding grooves.

[0036] The lead screw 5 passes through the slider 6 and is threadedly connected to it. Specifically, the lead screw 5 has an external thread, and the slider 6 has a threaded through hole. The external thread on the lead screw 5 is threadedly connected to the internal thread in the threaded through hole. In this way, when the lead screw 5 rotates, it can drive the slider 6 to slide.

[0037] The landing gear body 7 is rotatably connected to the housing. Specifically, a rotating shaft 25 is fixedly connected to the landing gear body 7, and a corresponding rotating shaft hole is provided on the housing. The rotating shaft 25 is rotatably connected to the rotating shaft hole, thereby realizing the rotatable connection between the landing gear body 7 and the housing. Note that only a part of the landing gear body 7 is shown in the accompanying drawings. The landing gear body 7 can actually be made as a single piece or composed of multiple connected parts; this invention does not impose any limitations on this.

[0038] The landing gear is equipped with a mating part corresponding to the slider 6. The slider 6 and the mating part are configured such that the sliding part drives the landing gear body 7 to rotate during the sliding of the slider 6. Specifically, as shown in the figure... Figure 7 As shown, the mating part is a mating groove 20 provided on the landing gear body 7, and a part of the slider 6 extends into the mating groove 20.

[0039] In the miniature retractable landing gear provided in this embodiment, the motor 4, multi-stage gear pair, and lead screw 5 are all mounted on the bracket 3 to form an integrated drive transmission assembly, which is then mounted as a whole on the housing. Therefore, the transmission accuracy and efficiency are higher, and the precision requirements of the mating housing are lower, which can reduce development costs. Moreover, the setting of the multi-stage gear pair allows for greater torque output within a limited space.

[0040] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited to the above embodiments. Even if various changes are made to the present invention, if these changes fall within the scope of the claims of the present invention and their equivalents, they shall still fall within the protection scope of the present invention.

Claims

1. A micro-lay-flat landing gear characterized in that, Includes housing, integrated drive transmission assembly, slider and landing gear body; The integrated drive transmission assembly includes a bracket, a driver, a multi-stage gear pair, and a lead screw. The driver is mounted on the bracket, the multi-stage gear pair is mounted on the bracket, the lead screw is rotatably connected to the bracket, the output end of the driver is connected to the input end of the multi-stage gear pair, and the output end of the multi-stage gear pair is connected to the lead screw. The bracket is mounted on the housing, the slider is slidably connected to the housing and the sliding direction is parallel to the axis of the lead screw; the lead screw passes through the slider and is threadedly connected to it; The landing gear body is rotatably connected to the housing. The landing gear is provided with a mating part corresponding to the slider. The slider and the mating part are configured such that the landing gear body is driven to rotate through the mating part during the sliding of the slider.

2. The miniature retractable landing gear according to claim 1, characterized in that, The bracket includes at least two mounting plates arranged side by side with spacing between them; one of the two outermost mounting plates in the bracket is a drive mounting plate and the other is a lead screw mounting plate. The drive mounting plate is connected to the driver, and the lead screw mounting plate is connected to the lead screw. The driver and the lead screw are located on opposite sides of the bracket.

3. The miniature retractable landing gear according to claim 2, characterized in that, The driver is a motor, which is fixedly mounted on the first side of the drive mounting plate. The output shaft of the motor passes through the drive mounting plate and is rotatably connected to it. Furthermore, the output shaft of the motor passes from the first side of the drive mounting plate to the second side of the drive mounting plate and is connected to the input end of the multi-stage gear pair on the second side of the drive mounting plate.

4. The miniature retractable landing gear according to claim 2, characterized in that, The lead screw is fixedly installed on the second side of the lead screw mounting plate. One end of the lead screw passes through the lead screw mounting plate and is rotatably connected to it. Furthermore, the lead screw passes from the second side of the lead screw mounting plate to the first side of the lead screw mounting plate and is connected to the output end of the multi-stage gear pair on the first side of the lead screw mounting plate.

5. The miniature retractable landing gear according to claim 1, characterized in that, The number of stages in the multi-stage gear pair is greater than or equal to three.

6. The miniature retractable landing gear according to claim 2, characterized in that, The multi-stage gear pair includes a first driving gear, a first driven gear, a second driving gear, a second driven gear, a third driving gear, a third driven gear, a fourth driving gear, and a fourth driven gear; The bracket includes three mounting plates: a drive mounting plate, a middle mounting plate, and a lead screw mounting plate; the mounting plates are fixedly connected to each other by connecting columns. The driver is mounted on the first side of the driver mounting plate, and the output end of the driver passes through the driver mounting plate to the second side of the driver mounting plate and is connected to the first drive gear. The intermediate mounting plate has a notch, and the first rotating shaft is located at the notch and its two ends are respectively rotatably connected to the drive mounting plate and the lead screw mounting plate; the first rotating shaft is respectively fixed with the first driven gear and the second driving gear, and the first driven gear meshes with the first driving gear. The second side of the intermediate mounting plate is rotatably connected to a second rotating shaft, and the second driven gear and the third driving gear are respectively fixedly connected to the second rotating shaft, with the second driven gear and the second driving gear meshing. The two ends of the third rotating shaft are rotatably connected to the intermediate mounting plate and the lead screw mounting plate, respectively. The third driven gear and the fourth driving gear are fixedly connected to the third rotating shaft, and the third driven gear and the third driving gear mesh. The lead screw is located on the second side of the lead screw mounting plate. One end of the lead screw passes through the lead screw mounting plate and is connected to the fourth driven gear on the first side of the lead screw mounting plate. The fourth driven gear meshes with the fourth driving gear.

7. The miniature retractable landing gear according to claim 2, characterized in that, The housing has a first receiving groove, and the bracket is installed in the first receiving groove; the first receiving groove has a first limiting surface and a second limiting surface that are arranged opposite to each other, the surface of the drive mounting plate facing the driver abuts against the first limiting surface, and the surface of the lead screw mounting plate facing the lead screw abuts against the second limiting surface.

8. The miniature retractable landing gear according to claim 7, characterized in that, The driver is a motor; the housing also has a second receiving groove, and the motor is installed in the second receiving groove; the second receiving groove is connected to the first receiving groove; the second receiving groove has a third limiting surface facing the first receiving groove, and the end face of the motor on the side away from the drive mounting plate abuts against the third limiting surface.

9. The miniature retractable landing gear according to claim 1, characterized in that, The housing is provided with a sliding groove, and the slider extends into the sliding groove and is slidably connected to it.

10. The miniature retractable landing gear according to claim 1, characterized in that, The mating part is a mating groove provided on the landing gear body, and a part of the slider extends into the mating groove.

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