A servo motor and an aircraft engine

Abstract

This invention relates to a servo motor and an aero-engine. The servo motor includes a housing, a first transmission component, a second transmission component, and a motor body. The first transmission component is disposed within the housing and has a plurality of first engaging portions evenly and spaced along its circumference. The first engaging portions extend axially along the first transmission component. The first end of the second transmission component is located within the housing and engages with the first engaging portions. The engagement position of the second transmission component and the first engaging portions is adjustable axially along the first transmission component. The motor body is disposed outside the housing, and the housing has a through hole at the end where the motor body is located. The drive end of the motor body is fixedly connected to the second end of the second transmission component, and either the drive end of the motor body or the second transmission component passes through the through hole. When the external installation space requirements change, the relative position of the motor body can be adjusted to meet the installation requirements, eliminating the need for overall structural design based on the installation space, thereby reducing design difficulty and production costs.

Description

Technical Field

[0001] This invention relates to the field of power transmission technology, specifically to a servo motor and an aircraft engine. Background Technology

[0002] Harmonic reducers have advantages such as compact structure, small size, light weight, high load capacity, small backlash, and high transmission accuracy, and are widely used in industrial robots, aerospace, and precision machine tools. A harmonic reducer consists of a rigid wheel, a flexible wheel, and a cam. The cam is installed inside the elastic metal flexible wheel, and the rigid wheel is sleeved outside the flexible wheel. The rotation of the cam forces the flexible wheel and the rigid wheel to periodically mesh and disengage, thereby achieving the effect of tooth-shifting speed reduction.

[0003] An electric servo mechanism is provided, comprising a motor, a body, a small bevel gear, an output shaft, a large bevel gear, and a harmonic reducer. The motor is fixed on the body, and the harmonic reducer is also mounted on the body. The small bevel gear is fixed on the output shaft of the motor and meshes with the large bevel gear. The large bevel gear is connected to a cam inside the harmonic reducer. When the motor rotates, it drives the small bevel gear to rotate, which in turn drives the large bevel gear and the cam to rotate. The cam forces a flexible wheel and a rigid wheel to mesh, and the rotation of the flexible wheel drives the output shaft to rotate.

[0004] However, the aforementioned electric servo mechanism cannot adjust the motor mounting position according to the installation space. In different installation scenarios, the overall structure needs to be redesigned, which increases the design cost. Summary of the Invention

[0005] Therefore, the technical problem to be solved by the present invention is the defect in the prior art that the motor installation position cannot be adjusted according to the installation space, and the overall structure needs to be redesigned in different installation situations, which increases the design cost.

[0006] Therefore, the present invention provides a servo motor, comprising:

[0007] case;

[0008] A first transmission member is disposed within the housing. The first transmission member has a plurality of first engagement portions that are uniformly and spaced apart along its circumference and extend along the axial direction of the first transmission member.

[0009] The second transmission component has a first end located inside the housing and meshing with the first meshing part. The meshing position of the second transmission component and the first meshing part can be adjusted along the axial direction of the first transmission component.

[0010] The motor body is disposed outside the housing. The housing has a through hole at one end where the motor body is disposed. The driving end of the motor body is fixedly connected to the second end of the second transmission member. The driving end or the second transmission member passes through the through hole.

[0011] Optionally, in the aforementioned servo motor, the first transmission component is a spherical gear, the first meshing portion is an arc-shaped tooth extending along the axial direction of the spherical gear, and the first end of the second transmission component is a bevel gear adapted to mesh with the spherical gear.

[0012] Optionally, in the aforementioned servo motor, the motor body is fixedly mounted on a fixing member, and the fixing member is slidably connected to the outer wall of the housing.

[0013] Optionally, in the aforementioned servo motor, the housing has an arc-shaped mounting portion, and the fixing member has a mating portion adapted to the arc-shaped mounting portion, wherein the mating portion is slidably connected to the arc-shaped mounting portion.

[0014] Optionally, in the aforementioned servo motor, the first transmission member has a small end and a large end, and the curvature of the arc-shaped mounting portion gradually decreases in the direction from the small end to the large end.

[0015] Optionally, the aforementioned servo motor further includes a reduction gear assembly, the reduction gear assembly comprising:

[0016] A cam component, wherein the cam component is connected to the first transmission component via a first connector;

[0017] A flexible gear component, wherein the flexible gear component is sleeved outside the cam component;

[0018] A steel wheel component is connected to the inner wall of the housing. The steel wheel component has a meshing cavity inside. The inner wall of the meshing cavity is provided with a plurality of second meshing parts evenly distributed around its central axis. The flexible wheel component has a plurality of third meshing parts evenly and spaced apart along its circumference. The cam component rotates so that a portion of the second meshing parts meshes with a portion of the third meshing parts.

[0019] Optionally, in the aforementioned servo motor, both the second meshing part and the third meshing part are straight teeth, and the number of teeth in the second meshing part is greater than the number of teeth in the third meshing part.

[0020] Optionally, the aforementioned servo motor further includes an output shaft, which passes through the housing and the flexible wheel in sequence, and the flexible wheel is fixedly connected to the output shaft via a second connector.

[0021] Optionally, the aforementioned servo motor further includes an extension member disposed between the cam member and the first transmission member.

[0022] The present invention also provides an aircraft engine, including the aforementioned servo mechanism.

[0023] The technical solution provided by this invention has the following advantages:

[0024] 1. The servo motor provided by the present invention includes a housing, a first transmission member, a second transmission member, and a motor body. The first transmission member is disposed inside the housing and has a plurality of first engagement portions evenly and spaced apart along its circumference. The first engagement portions extend along the axial direction of the first transmission member. The first end of the second transmission member is located inside the housing and engages with the first engagement portion. The engagement position of the second transmission member and the first engagement portion can be adjusted along the axial direction of the first transmission member. The motor body is disposed outside the housing. The housing has a through hole at one end where the motor body is disposed. The driving end of the motor body is fixedly connected to the second end of the second transmission member. The driving end or the second transmission member passes through the through hole.

[0025] This servo mechanism changes the relative position between the motor body and the housing by adjusting the meshing position of the second transmission component and the first meshing part. When the external installation space requirements change, the relative position of the motor body can be adjusted so that the motor body meets the installation requirements. There is no need to design the overall structure according to the installation space, thereby reducing the design difficulty and production cost.

[0026] 2. The servo motor provided by the present invention has a first transmission component of a spherical gear and a first end of a second transmission component of a bevel gear, which meshes with the spherical gear; the housing has an arc-shaped mounting part and the fixing part has a matching mating part, which is slidably connected to the arc-shaped mounting part; the angle between the motor body and the housing can be changed during installation to facilitate adjustment of the output angle.

[0027] 3. The servo motor provided by the present invention has a first transmission component with a large end and a small end. In the direction from the small end to the large end, the curvature of the arc-shaped mounting part gradually decreases. While ensuring that the meshing module of the bevel gear and the spherical gear remains unchanged, the curvature of the arc-shaped mounting part is changed to enable the bevel gear and the spherical gear to mesh normally, thereby avoiding wear caused by poor meshing between the bevel gear and the spherical gear.

[0028] 4. The servo motor provided by the present invention includes a cam component, a flexible wheel component, and a steel wheel component. The cam component is connected to a first transmission component through a first connecting component. The flexible wheel is sleeved outside the cam component, and the steel wheel meshes with the flexible wheel. Through the cooperation of the cam component, the flexible wheel component, and the steel wheel component, the deceleration output of the motor body is realized. Attached Figure Description

[0029] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0030] Figure 1 This is a cross-sectional view of the motor in the vertical position provided in the servo motor of the present invention;

[0031] Figure 2 This is a cross-sectional view of the motor tilting state provided in the servo motor of the present invention;

[0032] Figure 3 for Figure 1 A magnified view of a portion of the structure of the middle circle A;

[0033] Explanation of reference numerals in the attached figures:

[0034] 1-Housing shell; 11-Arc-shaped mounting part;

[0035] 2-First transmission component; 21-First meshing part;

[0036] 3-Second transmission component; 31-First end; 32-Second end;

[0037] 4-Motor body;

[0038] 5-Factor; 51-Matching part;

[0039] 61-Cam component; 62-Flexible gear component; 621-Third meshing part; 63-Steel wheel component; 631-Second meshing part;

[0040] 7-Output shaft;

[0041] 8-Extension piece. Detailed Implementation

[0042] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0043] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0044] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" 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 invention based on the specific circumstances.

[0045] Furthermore, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0046] Example 1

[0047] This embodiment provides a servo motor, such as Figure 1 and Figure 2 As shown, it includes a housing 1, a first transmission component 2, a second transmission component 3, and a motor body 4. The first transmission component 2 is disposed inside the housing 1, and the motor body 4 is disposed outside the housing 1. The housing 1 has a through hole at the end where the motor body 4 is disposed. The motor body 4 is a servo motor.

[0048] like Figure 1 and Figure 2As shown, in this embodiment, the servo motor has a first transmission component 2 that is a spherical gear. The right end of the first transmission component 2 is the large end, and the left end is the small end. Both ends of the first transmission component 2 are flat. The circumference of the first transmission component 2 is uniformly and spacedly provided with multiple first meshing portions 21. The first meshing portion 21 is an arc-shaped tooth extending along the axial direction of the first transmission component 2. The radius of the arc-shaped tooth is adapted according to the size of the housing 1. When the radius is determined, the curvature of the arc-shaped tooth remains unchanged. The first end 31 of the second transmission component 3 is located inside the housing 1. The first end 31 of the second transmission component 3 is a bevel gear that meshes with the spherical gear. The number of teeth of the bevel gear is less than the number of teeth of the spherical gear. The second transmission component 3 is a drive shaft. The bevel gear is keyed to one end of the drive shaft. The other end of the second transmission component 3 passes through a through hole on the housing 1 and is connected to the motor body 4. As an alternative implementation, the motor body 4 includes a drive shaft. The drive shaft passes through the through hole on the housing 1 and can be fixedly connected to the drive shaft by welding, snap-fitting, or other methods. By changing the meshing position of the bevel gear and the spherical gear, the included angle between the motor body 4 and the housing 1 can be changed, thereby adjusting the angle and position of the motor body 4. In another alternative embodiment, the first transmission member 2 is a bevel gear, the first meshing part 21 extends along the axial direction of the first transmission member 2, the first end of the second transmission member is also a bevel gear, and the length of the teeth of the bevel gear of the second transmission member 3 is less than the length of the first meshing part. The position of the motor body 4 can be adjusted by adjusting the meshing position of the second transmission member 3 and the first meshing part.

[0049] like Figure 1 and Figure 2 As shown, the servo motor provided in this embodiment has an arc-shaped mounting part 11 at the bottom of the housing 1. The arc-shaped mounting part 11 has a curvature similar to that of a spherical gear. That is, when the radius is determined, the curvature of the spherical gear is a fixed value, while the curvature of the arc-shaped mounting part 11 gradually decreases from the position near the small end to the position near the large end. While ensuring that the module remains unchanged, the gap between the bevel gear and the spherical gear is reduced by changing the curvature of the arc-shaped mounting part 11, thereby improving the transmission efficiency of the bevel gear and the spherical gear.

[0050] like Figure 1 and Figure 2 As shown, the servo motor provided in this embodiment also includes a fixing member 5. The fixing member 5 has a mating part 51, which is adapted to the arc-shaped mounting part 11 and is slidably connected to the arc-shaped mounting part 11. The mating part 51 is an arc-shaped concave surface, and the concave surface has the same curvature as the arc-shaped mounting part 11. One end of the fixing member 5 opposite to the concave surface is fixedly connected to the motor body 4 by welding, bolt connection or other fixed connection methods.

[0051] like Figures 1 to 3As shown, the servo motor provided in this embodiment also includes a reduction gear assembly, an output shaft 7, and an extension 8. The reduction gear assembly is a harmonic reducer, which includes a cam 61, a flexible gear 62, and a steel wheel 63. One end of the extension 8 abuts against the small end face of the spherical gear, and the other end of the extension 8 abuts against the cam 61. The cam 61 is connected to the first transmission member 2 through a first connector, that is, a bolt passes through the spherical gear and the extension 8 sequentially from the large end face of the spherical gear and is threadedly connected to the cam 61. The flexible gear 62 is a flexible component, and the cam 61 is a cam. A bearing is sleeved on the cam, and the flexible gear is sleeved outside the bearing. The steel wheel 63 is welded to the inner wall of the housing 1. As an alternative implementation, the steel wheel 63 can also be fixedly connected to the inside of the housing 1 by bolts. Here, the connection between the steel wheel 63 and the inner wall of the housing 1 is discussed. The method is not limited. The steel wheel 63 has a meshing cavity. The inner wall of the meshing cavity is provided with a plurality of second meshing parts 631 evenly distributed around its central axis. The flexible wheel 62 is provided with a plurality of third meshing parts 621 evenly and spaced along its circumference. Both the second meshing parts 631 and the third meshing parts 621 are straight teeth, and the number of teeth of the second meshing part 631 is greater than the number of teeth of the third meshing part 621. When the cam rotates, the flexible wheel is deformed, so that part of the second meshing part 631 meshes with the third meshing part 621. Since the number of teeth of the second meshing part 631 is greater than the number of teeth of the third meshing part 621, the flexible wheel 62 and the steel wheel 63 have a tooth misalignment. The rotation of the cam 61 forces the flexible wheel 62 to rotate, so that part of the second meshing part 631 meshes with part of the third meshing part 621. The output shaft 7 is housed inside the housing 1. One end of the output shaft 7 is connected to the outside, and the other end of the output shaft 7 passes through the steel wheel 63, the flexible wheel 62, the cam 61, and the extension 8 in sequence. The output shaft 7 is fitted with a bearing and a washer. The flexible wheel 62 is fixedly connected to the output shaft 7 by bolts. When the flexible wheel 62 rotates, it drives the output shaft 7 to rotate.

[0052] The servo motor provided in this embodiment has multiple limiting holes on the housing 1. When the motor body 4 is adjusted to a suitable position, the motor body 4 is fixedly connected to its corresponding limiting holes by screws.

[0053] The servo motor provided in this embodiment operates as follows:

[0054] When it is necessary to adjust the installation position of the motor body 4, the screws between the housing 1 and the motor body 4 are removed, and the motor body 4 is pushed to move. The motor body 4 drives the fixing part 5 to slide along the arc-shaped mounting part, and also drives the second transmission part 3 to slide along the arc-shaped mounting part 11. The second rotating part drives the bevel gear to move along the axial direction of the spherical gear. When the motor body 4 moves to the designated installation position, the motor body 4 is fixedly connected to the housing 1 by screws, so that the installation position between the motor body 4 and the housing 1 can be changed.

[0055] The servo motor provided in this embodiment changes the relative position between the motor body 4 and the housing 1 by adjusting the meshing position between the second transmission component 3 and the first meshing part 21. When the external installation space requirements change, the relative position of the motor body 4 can be adjusted so that the motor body 4 meets the installation requirements. There is no need to design the overall structure according to the installation space, thereby reducing the design difficulty and production cost.

[0056] Example 2

[0057] This embodiment provides an aircraft engine, including the servo motor in Embodiment 1, which is mounted on the aircraft engine body.

[0058] The servo motor mounting device provided in this embodiment achieves single-stage deceleration through the meshing of a bevel gear and a spherical gear, with the bevel gear having fewer teeth than the spherical gear. The deceleration effect is further improved by using a harmonic reducer.

[0059] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A steering gear, characterized in that The application relates to a transmission device, which comprises the following components: a housing (1); a first transmission member (2) arranged in the housing (1), the first transmission member (2) being provided with a plurality of first engaging portions (21) arranged uniformly and at intervals along the circumference thereof, the first engaging portions (21) extending along the axial direction of the first transmission member (2), the first transmission member (2) being a spherical gear, and the first engaging portions (21) being arc-shaped teeth extending along the axial direction of the spherical gear; a second transmission member (3), the first end (31) of the second transmission member (3) being arranged in the housing (1) and engaging with the first engaging portions (21), the first end (31) of the second transmission member (3) being an umbrella-shaped gear adapted to engage with the spherical gear; a motor body (4) arranged outside the housing (1), the housing (1) being provided with a through hole at the end where the motor body (4) is arranged, the driving end of the motor body (4) being fixedly connected with the second end (32) of the second transmission member (3), and the driving end or the second transmission member (3) penetrating through the through hole; the engaging position of the second transmission member (3) and the first engaging portions (21) can be adjusted along the axial direction of the first transmission member (2), the motor body (4) is fixedly arranged on a fixing member (5), the fixing member (5) is in sliding connection with the outer wall of the housing (1), the housing (1) is provided with an arc-shaped mounting portion (11), the fixing member (5) is provided with a matching portion (51) adapted to the arc-shaped mounting portion (11), and the matching portion (51) is in sliding connection with the arc-shaped mounting portion (11).

2. The steering gear of claim 1 wherein, The first transmission member (2) has a small end and a large end, and the curvature of the arc-shaped mounting portion (11) gradually decreases in the direction from the small end to the large end.

3. The steering engine according to any one of claims 1-2, characterized in that, The application further comprises a speed reduction assembly, which comprises: a cam member (61) connected with the first transmission member (2) through a first connecting member; a flexible gear member (62) sleeved outside the cam member (61); a steel gear member (63) connected with the inner wall of the housing (1), the steel gear member (63) being provided with an engaging cavity in the inner wall thereof, the inner wall of the engaging cavity being provided with a plurality of second engaging portions (631) arranged uniformly around the central axis thereof, the flexible gear member (62) being provided with a plurality of third engaging portions (621) arranged uniformly and at intervals along the circumference thereof, and the cam member (61) rotating to enable part of the second engaging portions (631) to engage with part of the third engaging portions (621).

4. The steering gear of claim 3 wherein, The second engaging portions (631) and the third engaging portions (621) are both straight teeth, and the number of the second engaging portions (631) is greater than that of the third engaging portions (621).

5. The steering gear of claim 4 wherein, The application further comprises an output shaft (7) penetrating through the housing (1) and the flexible gear member (62) in sequence, and the flexible gear member (62) is fixedly connected with the output shaft (7) through a second connecting member.

6. The steering gear of claim 5 wherein, Also included is an extension piece (8) provided between the cam piece (61) and the first transmission piece (2).

7. An aeroengine characterised in that, A steering gear comprising the steering gear of any one of claims 1-6.

Images