Rudder deflection angle measuring device for microminiature high-overload-resistant steering engine

Abstract

The invention relates to a rudder deflection angle measuring device for a microminiature high-overload-resistant steering engine, belongs to the technical field of angle measurement, and solves the problem that a conventional rudder deflection angle measuring device cannot adapt to the microminiature high-overload-resistant steering engine. The device comprises a base, a tool cabin and an angle measuring assembly. The tool cabin is used for installing a to-be-detected steering engine and a to-be-detected control surface and is supported on the base. The angle measuring assembly comprises a driving part, a driven part, a driven shaft, a bearing, a bearing seat and an angle encoder, the driving part is fixedly arranged at the bottom of the control surface, and the driven part is arranged at one end of the driven shaft and engaged with the driving part; the angle encoder is arranged at the other end of the driven shaft and can measure the rotation angle of the driven shaft. The deflection angle of the control surface is transmitted to the driven shaft in the mode that the driving part is fixedly arranged at the bottom of the control surface, the actual value of the rudder deflection angle is obtained by measuring the rotation angle of the driven shaft, and accurate measurement of the rudder deflection angle of the microminiature high-overload-resistant steering engine is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of angle measurement, and particularly to a rudder deflection angle measurement device for a micro-miniature high-overload-resistant servo. Background Art

[0002] Rudder deflection angle measurement is used for verifying the rotation angle of the rudder surface and non-linear fitting, and has a great influence on the attitude control accuracy of the aircraft. Conventional rudder deflection angle measurement devices mainly consist of a positioning mechanism and an encoder. The positioning mechanism includes a fixed base, and the encoder is coaxially installed with the rudder shaft. It can only measure the rotation angle of the rudder shaft and cannot measure the deflection angle of the rudder surface. The deflection angle of the rudder surface is the terminal output angle, and the rotation angle of the rudder shaft is the output angle of the servo. There may be a gap and return error between them at the previous stage of the terminal. At the same time, in the prior art, when measuring the angle of a conventional rudder shaft, since there is a suitable interface for installation and positioning of the rudder shaft, the measuring device can be directly docked with the interface. However, when measuring the rudder surface angle of a micro-miniature high-overload-resistant servo, due to the thin and complex shape of the rudder surface, and there is no suitable interface for the rudder shaft, and the space inside the servo is small, the conventional method of setting the measuring device on the rudder shaft cannot be adapted to the existing micro-miniature high-overload-resistant servo.

[0003] The micro-miniature high-overload-resistant servo involved in the present invention refers to a servo with a diameter within 70 mm that can resist overloads of up to ten thousand g. The micro-miniature high-overload-resistant servo plays an important role in the fields of aerospace, robotics, precision instruments, etc. due to its excellent performance advantages. At the same time, because the micro-miniature high-overload-resistant servo has a high initial launch speed, it has high requirements for the angle accuracy of the servo. Therefore, a device capable of accurately detecting the rudder surface deflection angle of the micro-miniature high-overload-resistant servo is needed. Summary of the Invention

[0004] In view of the above analysis, an embodiment of the present invention aims to provide a rudder deflection angle measurement device for a micro-miniature high-overload-resistant servo to solve the problem that the conventional rudder deflection angle measurement device cannot be adapted to the micro-miniature high-overload-resistant servo.

[0005] On the one hand, the present invention provides a rudder deflection angle measuring device for a micro-miniature high-overload servo, including a base, a tooling cabin and an angle measuring component; wherein, the tooling cabin is used to install the servo and the rudder surface to be detected, and support the servo and the rudder surface on the base; the angle measuring component includes a driving member, a driven member, a driven shaft, a bearing, a bearing seat and an angle encoder, and the driven shaft is arranged on the base through the bearing and the bearing seat; the driving member is fixedly arranged at the bottom of the rudder surface, the driven member is arranged at one end of the driven shaft and meshes with the driving member; the center of the arc surface of the driving member is on the rotation axis of the rudder surface, and the rotation radius of the driven member is equal to the rotation radius of the driving member; the angle encoder is arranged at the other end of the driven shaft and can measure the angle of rotation of the driven shaft.

[0006] Further, the base includes a cross-shaped seat body and a support frame body, wherein the support frame body is located in the middle of the cross-shaped seat body and protrudes upward by a certain distance; the cross-shaped seat body includes a middle cavity and four supports evenly distributed circumferentially around the middle cavity; each support includes a first installation space with an opening facing outwards, and the first installation space is used to install the bearing seat.

[0007] Further, the height of the bearing seat relative to the first installation space is adjustable.

[0008] Further, the support frame body includes a vertical support rod and a top support surface, the vertical support rod extends vertically upward from the top of the cross-shaped seat body, and the top support surface is fixedly arranged at the top of the vertical support rod.

[0009] Further, the top support surface has a middle through hole, and a plurality of first positioning holes are evenly distributed circumferentially around the middle through hole; positioning blocks are arranged at the four corners of the top support surface; the first positioning holes are adapted to the positioning protrusions at the bottom of the tooling cabin, and the positioning blocks are suitable for clamping the outer circumferential surface of the tooling cabin.

[0010] Further, the driving member includes a bow-shaped piece and mounting lugs located on both sides of the top of the bow-shaped piece.

[0011] Further, the mounting lugs are provided with third mounting holes for fixedly arranging the driving member at the bottom of the rudder surface through screws.

[0012] Further, a plurality of teeth are arranged on the arc surface of the bow-shaped piece or the arc surface is a friction surface.

[0013] Further, the angle measuring component further includes an elastic support piece, one end of the elastic support piece is fixedly connected to the angle encoder, and the other end is fixedly connected to the bearing seat.

[0014] Furthermore, the base further includes an auxiliary bracket, and the auxiliary bracket includes a horizontal bracket and a vertical bracket; the horizontal bracket is fixedly arranged at the bottom of the base, and the vertical bracket is fixedly arranged at one end of the horizontal bracket.

[0015] Compared with the prior art, the present invention can at least achieve one of the following beneficial effects: (1) For the rudder deflection angle measuring device of the present invention, by fixing the driving member at the bottom of the rudder surface and engaging the driven member with the driving member, the deflection angle of the rudder surface is transmitted to the driven shaft. By making the center of the arc surface of the driving member on the rotation axis of the rudder surface and the rotation radius of the driven member equal to the rotation radius of the driving member, the rotation angle of the driven shaft is made equal to the deflection angle of the rudder surface; by measuring the rotation angle of the driven shaft, the actual value of the rudder deflection angle is obtained, realizing accurate measurement of the rudder deflection angle of the micro-miniature high-overload servo. This solves the problem that the conventional rudder deflection angle measuring device cannot be adapted to the micro-miniature high-overload servo. Compared with the conventional rudder deflection angle measuring device that measures the rotation angle of the rudder shaft, the rudder deflection angle measuring device of the present invention directly measures the deflection angle of the rudder surface, and is not affected by the gap and return error between the rudder shaft and the rudder surface, and the measurement result is more accurate; at the same time, since the driving member is fixedly arranged at the bottom of the rudder surface, it will not affect the aerodynamic characteristics of the rudder surface. (2) Through the four supports of the cross-shaped seat body of the base of the present invention, the installation space for four angle measuring components is provided, and the rudder deflection angles of the four rudder surfaces of the servo can be collected simultaneously; through the support frame body, the installation space for the driving member and the driven member is provided, so that the deflection angle of the rudder surface can be transmitted to the driven shaft without difference. (3) By making the height of the bearing seat adjustable, the meshing clearance and return error between the driving member and the driven member can be reduced and eliminated, and the measurement accuracy of the rudder deflection angle of the servo is improved. (4) By setting the positioning holes, positioning blocks and positioning protrusions, the accurate positioning between the rudder surface and the angle measuring component is realized, so that the rudder deflection angle of the servo can be accurately measured.

[0016] In the present invention, the above technical solutions can also be combined with each other to achieve more preferred combination schemes. Other features and advantages of the present invention will be described in the subsequent description, and some advantages can be obvious from the description, or can be understood by implementing the present invention. The purpose and other advantages of the present invention can be realized and obtained through the content specifically pointed out in the description and the drawings. Description of the Drawings

[0017] The drawings are only for the purpose of showing specific embodiments, and are not considered as a limitation of the present invention. Throughout the drawings, the same reference signs represent the same components; Figure 1Schematic structural diagram of a rudder deflection angle measuring device for a micro-miniature high-overload-resistant steering gear; Figure 2 Longitudinal sectional view of a rudder deflection angle measuring device for a micro-miniature high-overload-resistant steering gear; Figure 3 Front view of a rudder deflection angle measuring device for a micro-miniature high-overload-resistant steering gear; Figure 4 Schematic structural diagram of the base; Figure 5 Schematic structural diagram of the bearing seat; Figure 6 Schematic structural diagram of the rudder surface; Figure 7 Schematic structural diagram of the driving part; Figure 8 Schematic structural diagram of the angle encoder and the elastic support piece.

[0018] Reference numerals: 10 - Base; 11 - Cross-shaped seat body; 111 - Support; 1111 - Base plate; 1112 - First side plate; 1113 - Second side plate; 1114 - Third side plate; 11141 - First mounting hole; 1115 - First mounting space; 1116 - Second mounting space; 12 - Support frame; 121 - Vertical support rod; 122 - Top support surface; 13 - Auxiliary support; 131 - Horizontal support; 132 - Vertical support; 20 - Tooling cabin; 21 - Cylindrical main body; 211 - Positioning step surface; 212 - Second mounting hole; 213 - Sliding bearing; 30 - Angle measurement assembly; 31 - Driving part; 311 - Bow-shaped piece; 3111 - Arc surface; 3112 - Top surface; 312 - Mounting lug; 3121 - Third mounting hole; 32 - Driven part; 33 - Driven shaft; 34 - Rolling bearing; 35 - Bearing seat; 351 - Shaft hole; 352 - Fourth mounting hole; 353 - U-shaped groove; 354 - Strip-shaped through hole; 355 - Elastic piece fixing hole; 36 - Angle encoder; 37 - End cover; 38 - Positioning screw; 39 - Elastic support piece; 40 - Steering gear; 50 - Rudder surface. Detailed implementation manners

[0019] The following will specifically describe the preferred embodiments of the present invention with reference to the accompanying drawings, where the accompanying drawings form a part of the present invention and are used together with the embodiments of the present invention to explain the principle of the present invention, and are not used to limit the scope of the present invention.

[0020] Embodiment 1 Embodiment 1 discloses a rudder deflection angle measuring device for a micro-miniature high-overload-resistant steering gear, and its structure is as shown in Figure 1 、 Figure 2 and Figure 3As shown, it is used to realize the real-time acquisition of the rudder deflection angle of the servo, and further realize the evaluation of the feedback data of the angle sensor of the servo itself.

[0021] The rudder deflection angle measuring device for the micro-miniature high-overload resistant servo 40 in this embodiment includes a base 10, a tooling cabin 20 and an angle measuring component 30. Among them, the tooling cabin 20 is used to install the servo 40 and the rudder surface 50 to be detected, and support the servo 40 and the rudder surface 50 on the base 10. There are multiple angle measuring components 30, which are arranged on the base 10 in one-to-one correspondence with the rudder surface 50. Each angle measuring component 30 is combined with a corresponding rudder surface 50 and can sense the rotation angle of the rudder surface 50 relative to its installation axis.

[0022] The structure of the base 10 is as Figure 4 shown. The base 10 includes a cross-shaped seat body 11 and a support frame body 12, where the support frame body 12 is located in the middle of the cross-shaped seat body 11 and protrudes upward for a certain distance.

[0023] The cross-shaped seat body 11 includes a middle cavity and four supports 111 evenly distributed circumferentially around the middle cavity. Each support 111 includes a bottom plate 1111, and a first side plate 1112, a second side plate 1113 and a third side plate 1114 that vertically extend upward from three side edges of the bottom plate 1111 respectively. The first side plate 1112 and the second side plate 1113 are arranged oppositely, and both ends of the third side plate 1114 are respectively connected to the first side plate 1112 and the second side plate 1113, and the third side plate 1114 is close to the middle of the cross-shaped seat body 11.

[0024] The edges of adjacent bottom plates 1111 are connected to each other to form a whole. The first side plate 1112, the second side plate 1113 and the third side plate 1114 enclose a first installation space 1115 with an opening facing outward, and this first installation space 1115 is used to install the bearing seat 35 of the angle measuring component 30. A plurality of first installation holes 11141 are provided on the third side plate 1114 to facilitate the installation of the bearing seat 35. Threaded holes are provided on each bottom plate 1111 for setting positioning screws 38.

[0025] Preferably, the width of the first installation space 1115 is slightly larger than the width of the bearing seat 35, so that there is a small clearance fit between the bearing seat 35 and the first installation space 1115, so that the bearing seat 35 can move up and down in the first installation space 1115 without tilting.

[0026] The ends of all the first side plates 1112 and the second side plates 1113 facing the middle extend inward and protrude a certain distance from the third side plate 1114. The ends of the first side plate 1112 of any one support 111 and the second side plate 1113 of the adjacent support 111 close to the middle are connected to each other to form a whole.

[0027] The support frame 12 includes vertical support rods 121 and a top support surface 122. There are four vertical support rods 121, which extend vertically upward from the connecting part of the adjacent first side plate 1112 and the second side plate 1113. The top support surface 122 is a square flat plate, which is fixedly arranged at the top of the vertical support rods 121.

[0028] The top support surface 122 has a central through hole, and a plurality of positioning holes are circumferentially and evenly distributed around the central through hole. Positioning blocks are arranged at the four corners of the square top support surface 122. Preferably, the positioning blocks are arc-shaped strip protrusions, and the diameter of the inner circumference of the positioning blocks is equal to the outer diameter of the tooling cabin 20. When the tooling cabin 20 is placed on the base 10, the four positioning blocks just clamp the bottom of the outer circumferential surface of the tooling cabin 20.

[0029] Furthermore, an interruption groove is arranged in the middle of one of the positioning blocks, dividing the positioning block into two arc-shaped strip protrusions spaced from each other. Correspondingly, a positioning key is arranged at the bottom of the outer circumferential surface of the tooling cabin 20. By snapping the positioning key into the interruption groove, the circumferential positioning and locking of the tooling cabin 20 are realized.

[0030] The adjacent two vertical support rods 121, the top support surface 122, and the corresponding first side plate 1112 and the second side plate 1113 jointly enclose a second installation space 1116, which is used for installing the driving part 31 and the driven part 32.

[0031] See Figure 1 、 Figure 2 and Figure 3 , the tooling cabin 20 is a cylindrical structure, which is used for installing the servo 40 and the rudder surface 50 to be detected, and supporting the servo 40 and the rudder surface 50 on the base 10.

[0032] The tooling cabin 20 includes a cylindrical main body 21. A plurality of positioning protrusions or positioning holes are circumferentially and evenly distributed at the bottom of the cylindrical main body 21. During operation, the tooling cabin 20 can be directly placed on the top support surface 122 of the base 10, or positioning pins can be installed in the positioning holes on the top support surface 122 first, and then the tooling cabin 20 is placed on the top support surface 122. At the same time, the outer circumferential surface of the tooling cabin 20 is clamped by the four positioning blocks, realizing the positioning and locking of the tooling cabin 20. Through the positioning holes and positioning blocks arranged on the base 10, the axial and circumferential accurate positioning of the tooling cabin 20 can be realized, ensuring better measurement accuracy.

[0033] The central through-hole of the tooling cabin 20 is divided into two sections. The diameter of the upper-section central through-hole is smaller than that of the lower-section central through-hole. A positioning step surface 211 is formed at the connection of the upper-section central through-hole and the lower-section central through-hole. This positioning step surface 211 is used to achieve axial positioning of the steering gear 40. The steering gear 40 passes through the central through-hole of the tooling cabin 20 from bottom to top and is positioned by the positioning step surface 211. A plurality of fixing holes are provided on the outer circumferential surface of the tooling cabin 20, and the steering gear 40 can be fixedly installed in the tooling cabin 20 by screws.

[0034] Four second mounting holes 212 are provided on the outer circumferential surface of the tooling cabin 20 for mounting the rudder surface 50. The mounting shaft of the rudder surface 50 is arranged in the second mounting hole 212 through a sliding bearing 213, and the end of the mounting shaft is in transmission connection with the rudder shaft of the steering gear 40 and can be driven by the rudder shaft to rotate around the axis of the mounting shaft, thereby driving the rudder surface 50 to deflect.

[0035] Compared with a common rudder surface 50, the rudder surface 50 of the micro-miniature high-overload-resistant steering gear 40 applicable to this embodiment is small and thin, and its main body shape is an irregular wedge shape, as Figure 6 shown. Therefore, it is not convenient to directly clamp and position to achieve coaxial output.

[0036] When measuring the deflection angle of the rudder surface 50 using the rudder deflection angle measuring device of this embodiment, two threaded holes need to be provided on the bottom surface of the rudder surface 50, as Figure 2 、 Figure 6 shown. These two threaded holes are used to fix the driving member 31 to transmit the deflection movement of the rudder surface 50 to the angle measuring assembly 30. These two threaded holes are arranged along the width direction of the rudder surface 50. Since these two threaded holes are provided on the bottom surface of the rudder surface 50, they will not affect the aerodynamic characteristics of the rudder surface 50.

[0037] The angle measuring assembly 30 includes a driving member 31, a driven member 32, a driven shaft 33, a rolling bearing 34, an end cover 37, a bearing seat 35, and an angle encoder 36. Among them, the driving member 31 is fixedly installed on the bottom surface of the rudder surface 50, the driven member 32 is engaged with the driving member 31, the driven member 32 is fixedly installed at one end of the driven shaft 33, the angle encoder 36 is fixedly installed at the other end of the driven shaft 33, the middle part of the driven shaft 33 is installed on the bearing seat 35 through the rolling bearing 34, and the bearing seat 35 is adjustably arranged on the support 111 of the base 10. The deflection of the rudder surface 50 can be transmitted to the driven shaft 33 through the driving member 31 and the driven member 32, and then the specific rotation angle can be detected by the angle encoder 36.

[0038] See Figure 1 、 Figure 3 and Figure 7, the driving member 31 includes an arcuate piece 311 and mounting lugs 312 located on both sides of the top of the arcuate piece 311. The arcuate piece 311 includes a top surface 3112 and an arc surface 3111, wherein the center of the arc surface 3111 is on the central axis of the mounting shaft of the rudder surface 50. A plurality of teeth are provided on the arc surface 3111 of the arcuate piece 311 or the arc surface 3111 is a friction surface.

[0039] See Figure 7 , the mounting lugs 312 are flush with the top of the arcuate piece 311, and a third mounting hole 3121 is provided on each mounting lug 312. The distance and size between the two third mounting holes 3121 are the same as the distance and size between the two threaded holes on the bottom surface of the rudder surface 50, which is suitable for fixedly mounting the driving member 31 on the bottom of the rudder surface 50 through screws. Thus, the driving member 31 can rotate around the central axis corresponding to its arc surface 3111 as the rudder surface 50 deflects. Since the rotation axis of the driving member 31 is coaxial with the mounting axis of the rudder surface 50, the rotation angles of the driving member 31 and the rudder surface 50 are exactly the same. The rudder surface 50 and the driving member 31 can also be fixed together by an interference fit connection of a pin and a pin hole. The positioning and fixing of the driving member 31 and the rudder surface 50 are realized through the threaded holes on the bottom surface of the rudder surface 50 and the third mounting holes 3121 of the driving member 31, and this connection method will not affect the aerodynamic characteristics of the rudder surface 50.

[0040] The driven member 32 is a driven gear or a driven friction wheel that meshes with the driving member 31. The radius of the driven member 32 is equal to the rotation radius of the driving member 31. When the driving member 31 rotates, the driven member 32 will also rotate by the same angle. The driven member 32 is sleeved on one end of the driven shaft 33 and fixed to the driven shaft 33 by screws.

[0041] The structure of the bearing seat 35 is as Figure 5 shown. The bearing seat 35 is an overall flat plate structure. A shaft hole 351 is provided in the upper part of the bearing seat 35, and the rolling bearing 34 is fixedly arranged in the shaft hole 351. Four fourth mounting holes 352 are evenly distributed around the shaft hole 351 for mounting the end cover 37.

[0042] The lower part of the bearing housing 35 is provided with two vertically extending U-shaped grooves 353, and a strip-shaped through hole 354 is provided at the bottom of the U-shaped groove 353. The bearing housing 35 is arranged in the first installation space 1115 of a support 111 of the base 10, abuts against the third side plate 1114, and the bearing housing 35 is fixedly arranged on the base 10 by screws passing through the strip-shaped through hole 354 and the first installation hole 11141. Before the screws are tightened, the bearing housing 213 can slide up and down. By sliding up and down, the driving member 31 and the driven member 32 are meshed without clearance. By adjusting the position of the screw relative to the strip-shaped through hole 354, the height position of the bearing housing 35 can be adjusted, so as to ensure the clearance-free meshing of the driving member 31 and the driven member 32 and avoid return error. The bearing housing 35 and the first installation space 1115 of the base 10 are in a small clearance fit to ensure that it can slide up and down without tilting.

[0043] The positioning screw 38 is installed on the bottom plate 1111 of the base 10 from bottom to top and supports the bottom of the bearing housing 35. When installing the bearing housing 35, the height of the bearing housing 35 can be adjusted by adjusting the positioning screw 38.

[0044] See Figure 2 , the rolling bearing 34 is sleeved on the driven shaft 33 and abuts against two shaft shoulders of the driven shaft 33. The driven shaft 33 and the rolling bearing 34 pass through the shaft hole 351 of the bearing housing 35, and the end cover 37 is fixed on both sides of the bearing housing 35 by screws to fix the rolling bearing 34.

[0045] The rotor of the angle encoder 36 is sleeved on the driven shaft 33 and fixed to the outer end of the driven shaft 33 by a locking hoop (not shown in the figure). The stator housing of the angle encoder 36 is fixedly connected to the base 10 or the bearing housing 35 through a connecting member (not shown in the figure).

[0046] When measuring the rudder deflection angle of a micro-miniature high-overload-resistant steering gear using the rudder deflection angle measuring device of Embodiment 1, first, two threaded holes need to be machined at the bottom of the rudder surface 50. Then, the steering gear 40 is installed into the tooling cabin 20, and the rudder surface 50 is installed on the outer circumferential surface of the tooling cabin 20 and connected to the rudder shaft of the steering gear 40. Next, the tooling cabin 20 is installed on the support frame 12 of the base 10, and then the driving member 31 is fixedly arranged at the bottom of the rudder surface 50. The driven member 32, the driven shaft 33, the rolling bearing 34, the end cover 37, the bearing seat 35, and the angle encoder 36 are assembled together. Then, the bearing seat 35 is fixed into the first installation space 1115 of the base 10, and the driven member 32 is located in the second installation space 1116. At the same time, the positioning screw 38 is adjusted so that the driven member 32 and the driving member 31 are in non-clearance meshing. Then, the bearing seat 35 is fixed to the third side plate 1114 of the support 111 of the base 10 using screws. The stator housing of the angle encoder 36 is fixedly connected to the base 10 or the bearing seat 35. The steering gear 40 is started to drive the rudder surface 50 to rotate, and the rudder deflection angle of the rudder surface 50 is measured by the angle encoder 36.

[0047] Compared with the prior art, the rudder deflection angle measuring device for a micro-miniature high-overload-resistant steering gear of Embodiment 1 can realize the acquisition and conversion of the rudder surface deflection angle by using a non-coaxial measurement method, and can collect four-way rudder deflection angle data simultaneously.

[0048] Embodiment 2 Embodiment 2 of the present invention relates to a rudder deflection angle measuring device for a micro-miniature high-overload-resistant steering gear. On the basis of Embodiment 1, there are also the following differences: the angle measurement assembly 30 further includes an elastic support sheet 39, and the base 10 further includes an auxiliary bracket 13.

[0049] For the structure of the elastic support sheet 39, refer to Figure 1 、 Figure 2 and Figure 8 as shown.

[0050] The elastic support sheet 39 is a stepped sheet-like part, which can be obtained by folding an elastic thin sheet multiple times. One end of the elastic support sheet 39 is fixed on the inner end face of the angle encoder 36, and the other end is fixed on the side face of the bearing seat 35 by screws. Correspondingly, an elastic sheet fixing hole 355 is also provided at the lower part of the bearing seat 35, and the elastic sheet fixing hole 355 is located between two U-shaped grooves 353.

[0051] The elastic support sheet 39 can restrict the rotational freedom of the stator housing of the angle encoder 36, and at the same time can play an auxiliary supporting role for the angle encoder 36, thereby avoiding the measurement error caused by the bending deformation of the driven shaft 33 under the action of the gravity of the angle encoder 36 and further improving the measurement accuracy.

[0052] The elastic support of the angle encoder 36 is realized through the elastic support piece 39, which can not only provide a supporting effect but also will not generate redundant stress on the driven shaft 33. The elastic support piece 39 is a stepped structure, providing relatively high stiffness and being convenient for installation on the base 10.

[0053] The material of the elastic support piece 39 can be an elastic metal material or a plastic material with certain elasticity and stiffness.

[0054] The auxiliary support 13 includes a horizontal support 131 and a vertical support 132. The horizontal support 131 is fixed to the bottom of the base 10 by screws, and the vertical support 132 is fixed to the horizontal support 131 by screws, as Figure 1 and Figure 2 shown.

[0055] The horizontal support 131 and the vertical support 132 can realize the axial horizontal placement of the rudder deflection angle measuring device of the second embodiment, which is convenient for adjusting the positioning screw 38 and can also be used as a handle for easy carrying.

[0056] In addition, during the installation process, due to the setting of the horizontal support 131 and the vertical support 132, the rudder deflection angle measuring device of this embodiment can be placed horizontally or longitudinally, which is convenient for assembly and adjustment of the positioning screw 38.

[0057] Compared with the prior art, the rudder deflection angle measuring device for a micro-miniature high-overload steering gear of the second embodiment can overcome the measurement error caused by the bending deformation of the driven shaft 33 and is convenient for installation and carrying.

[0058] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present invention should be covered by the protection scope of the present invention.

Claims

1. A rudder angle measuring device for a miniature high overload resistant servo, characterized in that: It comprises a base, a tooling cabin and an angle measuring assembly; wherein the tooling cabin is used for installing a steering engine and a rudder surface to be tested, and supporting the steering engine and the rudder surface on the base; the angle measuring assembly comprises an active member, a driven member, a driven shaft, a bearing, a bearing seat and an angle encoder, wherein the driven shaft is arranged on the base through the bearing and the bearing seat; the active member is fixedly arranged at the bottom of the rudder surface, the driven member is arranged at one end of the driven shaft and meshes with the active member; the center of the arc surface of the active member is on the rotation axis of the rudder surface, and the rotation radius of the driven member is equal to the rotation radius of the active member; the angle encoder is arranged at the other end of the driven shaft and can measure the rotation angle of the driven shaft.

2. The device for measuring the rudder angle of a micro-sized high overload resistant steering gear according to claim 1, characterized in that: The base includes a cross-shaped seat body and a support frame, wherein the support frame is located in the middle of the cross-shaped seat body and protrudes upward for a distance; the cross-shaped seat body includes a central cavity and four supports evenly distributed around the central cavity; each of the supports includes a first installation space opening outward, and the first installation space is used to install the bearing seat.

3. The device for measuring the rudder angle of a micro-sized high overload resistant steering gear according to claim 2, characterized in that: The height of the bearing seat relative to the first installation space is adjustable.

4. The device for measuring the rudder angle of a micro-sized high overload resistant steering gear according to claim 2, characterized in that: The support frame comprises a vertical support rod and a top support surface. The vertical support rod extends vertically upward from the top of the cross-shaped seat body, and the top support surface is fixedly arranged on the top of the vertical support rod.

5. The device for measuring the rudder angle of a micro-sized high overload resistant steering gear according to claim 4, characterized in that: The top support surface is provided with a central through hole, and a plurality of first positioning holes are evenly distributed circumferentially around the central through hole; positioning blocks are provided at the four corners of the top support surface; the first positioning holes are matched with the positioning protrusions at the bottom of the tooling cabin, and the positioning blocks are suitable for clamping the outer circumferential surface of the tooling cabin.

6. The device for measuring the rudder angle of a micro-sized high overload resistant steering gear according to claim 1, characterized in that: The active component comprises a bow-shaped piece and mounting lugs located on both sides of the top of the bow-shaped piece.

7. The device for measuring the rudder angle of a micro-sized high overload resistant steering gear according to claim 6, characterized in that: The mounting lug is provided with a third mounting hole for fixing the active component to the bottom of the rudder surface by means of screws.

8. The device for measuring the rudder angle of a micro-sized high overload resistant steering gear according to claim 7, characterized in that: The arc surface of the arc-shaped piece is provided with a plurality of teeth or the arc surface is a friction surface.

9. The device for measuring the rudder angle of a micro-sized high overload resistant steering gear according to claim 1, characterized in that: The angle measurement assembly also includes an elastic support sheet, one end of which is fixedly connected to the angle encoder, and the other end of which is fixedly connected to the bearing seat.

10. The device for measuring the rudder angle of a micro-sized high overload resistant steering gear according to claim 1, characterized in that: The base also includes an auxiliary bracket, which includes a horizontal bracket and a vertical bracket; the horizontal bracket is fixedly arranged at the bottom of the base, and the vertical bracket is fixedly arranged at one side end of the horizontal bracket.

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