Testing device for linear steering engine

Abstract

The utility model discloses a testing device for a linear steering engine, and belongs to the technical field of linear steering engines. The testing device comprises a supporting assembly and a transmission assembly. The supporting assembly comprises a bottom plate, a first support, a second support, a third support and a rotating shaft, the two ends of the rotating shaft are rotationally inserted into the second support and the third support respectively, and a pointer arranged in the radial direction of the rotating shaft is detachably installed on the peripheral wall of the rotating shaft. The transmission assembly comprises a first pin shaft, a second pin shaft, a correction rod and a rocker arm, one end of the correction rod is detachably arranged on the first pin shaft in a sleeving mode, one end of the rocker arm is fixed to the outer wall of the rotating shaft, the second pin shaft is inserted into the other end of the rocker arm, and the other end of the correction rod is detachably arranged on the second pin shaft in a sleeving mode. The testing device for the linear steering engine provided by the embodiment of the utility model not only can conveniently adjust the zero position of the linear steering engine during a zero position test, but also can conveniently judge whether the linear steering engine moves in place during a displacement test.

Description

Technical Field

[0001] The utility model belongs to the technical field of linear servos, and in particular relates to a testing device for linear servos. Background Art

[0002] The linear servo generates axial displacement (extension or retraction) following the control command, and the control surface deflects according to the rudder control signal. It is the actuator to ensure the stable flight of the aircraft. The distance of axial displacement will directly affect the size of the control surface deflection angle, so it is necessary to measure the linear servo's progressive zero position and linear displacement.

[0003] When testing the zero position of a linear servo, adjusting the zero position is difficult due to the lack of a reference point and poor control. Furthermore, when testing the displacement of a linear servo, the actual displacement is difficult to measure, making it impossible to determine whether the servo has reached its desired position. Utility Model Content

[0004] In response to the above defects or improvement needs of the prior art, the present invention provides a testing device for a linear servo, the purpose of which is not only to conveniently adjust the zero position of the linear servo during the zero position test, but also to conveniently determine whether the linear servo has moved into place during the displacement test.

[0005] To achieve the above-mentioned object, the present invention provides a testing device for a linear servo, the testing device comprising a support assembly and a transmission assembly;

[0006] The support assembly includes a base plate, a first support, a second support, a third support, and a rotating shaft. The first support, the second support, and the third support are arranged on the base plate at intervals. The rotating shaft is arranged parallel to the base plate and at intervals and extends along a first direction. Both ends of the rotating shaft are rotatably inserted into the second support and the third support, respectively. A pointer arranged radially along the rotating shaft is detachably mounted on an outer peripheral wall of the rotating shaft. A dial with angular scale lines is provided on the second support or the third support, so that the pointer can read a value after rotating relative to the dial.

[0007] The transmission assembly includes a first pin shaft, a second pin shaft, a correction rod and a rocker arm. The first pin shaft and the second pin shaft are arranged parallel to the base plate and extend along the first direction. The first pin shaft is inserted on the first support. The correction rod is arranged parallel to the base plate and spaced apart, and the axial direction of the correction rod extends along the second direction. One end of the correction rod is detachably mounted on the first pin shaft. One end of the rocker arm is fixed on the outer wall of the rotating shaft. The second pin shaft is inserted on the other end of the rocker arm. The other end of the correction rod is detachably mounted on the second pin shaft.

[0008] Optionally, the first support is movably arranged on the base plate along the second direction.

[0009] Optionally, the base plate has a plurality of mounting holes arranged at intervals, the plurality of mounting holes extend along the second direction, and bolts are inserted into the first support, and the bolts are inserted into the corresponding mounting holes.

[0010] Optionally, an arc-shaped portion is provided on one end of the pointer facing the rotating shaft, and a plurality of bolts are inserted into the arc-shaped portion to connect the rotating shaft.

[0011] Optionally, a reinforcing rib is provided on the pointer, the reinforcing rib is a triangular structure, and two side edges of the reinforcing rib are respectively connected to the pointer and the arc-shaped portion.

[0012] Optionally, a connecting portion is provided at one end of the rocker arm, a square notch is provided on the outer peripheral wall of the rotating shaft, the connecting portion is inserted into the square notch, and the two are connected together by bolts.

[0013] Optionally, bearings are installed on both the second support and the third support, and both ends of the rotating shaft are installed in the corresponding bearings.

[0014] Optionally, the second support or the third support is provided with a plurality of spaced positioning holes and threaded holes, and the scale plate is movably installed with a plurality of spaced positioning pins and bolts, each positioning pin is inserted in the corresponding positioning hole, and each bolt is inserted in the corresponding threaded hole.

[0015] Optionally, the base plate, the first support, the second support and the third support are all steel structures.

[0016] Optionally, the graduation value of the angle scale line on the scale disk is 0.2°.

[0017] The above-mentioned improved technical features can be combined with each other as long as they do not conflict with each other.

[0018] In general, the above technical solutions conceived by the present invention have the following beneficial effects compared with the prior art:

[0019] In a test device for a linear servo provided in an embodiment of the present invention, when measuring the linear servo, first, a correction rod is installed on the first and second pins, and a pointer is installed on the rotating shaft, so that the pointer is arranged vertically and aligned with the 0° angle scale line on the dial. This ensures that when the linear servo is subsequently installed, the pointer will point exactly to the zero position of the dial when it is at zero. Next, the correction rod is removed, and the fixed end of the linear servo is hinged to the first pin, and the movable end of the linear servo is hinged to the second pin, thereby performing a zero-point test. Specifically, whether the linear servo is at zero position is determined by whether the pointer points exactly to the zero position of the dial. When the pointer deviates from the 0° scale line on the dial, the linear servo is driven so that the pointer points exactly to the zero position. At this time, the zero position of the linear servo is adjusted by reference to the 0° scale line. Then, extension commands are sequentially input to the linear servo. Extension of the linear servo's movable end causes the rocker arm to rotate, which in turn causes the shaft and pointer to rotate. The pointer then rotates to the corresponding angle, and the angle scale on the dial indicates the rocker arm's rotation. Based on this angle reading, the actual extension of the linear servo is calculated using the angle reading, the length of the rocker arm, and the distance between the first and second pins in the second direction. Finally, by comparing the input extension command with the actual extension of the linear servo, it can be determined whether the linear servo has moved into position.

[0020] That is to say, the test device for a linear servo provided by the embodiment of the present invention can not only conveniently adjust the zero position of the linear servo during the zero position test, but also conveniently determine whether the linear servo has moved into position during the displacement test. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a structural diagram of a testing device for a linear servo provided by an embodiment of the present utility model;

[0022] Figure 2 This is a schematic diagram of the assembly of the base plate provided by an embodiment of the present utility model;

[0023] Figure 3 This is a schematic diagram of the assembly of the rotating shaft provided by an embodiment of the present utility model;

[0024] Figure 4 This is a schematic diagram of the principle of the testing device provided by the embodiment of the utility model;

[0025] Figure 5 It is a schematic diagram of the structure of the pointer provided by the embodiment of the utility model;

[0026] Figure 6 This is a schematic structural diagram of a rocker arm provided by an embodiment of the present utility model;

[0027] Figure 7 It is a structural schematic diagram of the rotating shaft provided by an embodiment of the utility model.

[0028] In all the drawings, the same reference numerals represent the same technical features, specifically:

[0029] 1. Base plate; 11. Mounting hole; 2. First support; 3. Second support; 4. Third support; 5. Rotating shaft; 51. Pointer; 511. Arc-shaped portion; 512. Reinforcing rib; 52. Square notch; 6. Dial; 7. First pin; 8. Second pin; 9. Correction rod; 10. Rocker arm; 101. Connecting portion; 102. Flat portion. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only intended to explain the present invention and are not intended to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

[0031] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0032] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this utility model, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0033] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediate medium; internal communication between two components, or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0034] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0035] Example:

[0036] Figure 1 Schematic diagram of a test device for a linear servo provided by an embodiment of the present invention. Figure 1 As shown, the testing device includes a support assembly and a transmission assembly. The support assembly includes a base plate 1, a first support 2, a second support 3, a third support 4 and a rotating shaft 5.

[0037] Figure 2 This is a schematic diagram of the assembly of the base plate provided by the embodiment of the present utility model, as shown in FIG. Figure 2 As shown, the first support 2 , the second support 3 and the third support 4 are arranged on the base plate 1 at intervals.

[0038] Figure 3 This is a schematic diagram of the assembly of the rotating shaft provided by the embodiment of the utility model, as shown in FIG. Figure 3 As shown, the rotating shaft 5 is arranged parallel to the base plate 1 and extends along the first direction (X-axis direction). The two ends of the rotating shaft 5 are rotatably inserted on the second support 3 and the third support 4 respectively. A pointer 51 arranged radially along the rotating shaft 5 is detachably mounted on the outer peripheral wall of the rotating shaft 5. A dial 6 with angular scale lines is provided on the second support 3 or the third support 4, so that the pointer 51 can be rotated relative to the dial 6 to read the reading.

[0039] The transmission assembly includes a first pin shaft 7, a second pin shaft 8, a correction rod 9 and a rocker arm 10. The first pin shaft 7 and the second pin shaft 8 are arranged parallel to the base plate 1 and extend along the first direction. The first pin shaft 7 is inserted on the first support 2. The correction rod 9 is arranged parallel to and spaced apart from the base plate 1, and the axial direction of the correction rod 9 extends along the second direction (Y-axis direction). One end of the correction rod 9 is detachably mounted on the first pin shaft 7. One end of the rocker arm 10 is fixed on the outer wall of the rotating shaft 5. The second pin shaft 8 is inserted on the other end of the rocker arm 10. The other end of the correction rod 9 is detachably mounted on the second pin shaft 8.

[0040] In the test device for a linear servo provided by the present invention, when measuring the linear servo, first, a calibration rod 9 is installed on the first and second pins 7 and 8, and a pointer 51 is installed on the rotating shaft 5. The pointer 51 is arranged vertically and aligned with the 0° angle scale line on the dial 6. This ensures that when the linear servo is subsequently installed, the pointer 51 will point exactly at the zero position of the dial 6 when it is at its zero position. Next, the calibration rod 9 is removed, and the fixed end of the linear servo is hinged to the first pin 7, and the movable end of the linear servo is hinged to the second pin 8, thereby performing a zero-point test. Whether the linear servo is at its zero position is determined by whether the pointer 51 points exactly at the zero position of the dial 6. When the pointer 51 deviates from the 0° scale line on the dial 6, the linear servo is driven so that the pointer 51 points exactly at the zero position. At this point, the zero position of the linear servo is adjusted by reference to the 0° scale line. Then, extension commands are sequentially input to the linear servo. Extension of the linear servo's movable end causes the rocker arm 10 to rotate, which in turn causes the rotating shaft 5 and pointer 51 to rotate. Pointer 51 then rotates to the corresponding angle, and the angle scale on the dial 6 provides a reading of the rocker arm 10's rotation. Based on this angle reading, the length of the rocker arm 10, and the distance between the first pin 7 and the second pin 8 in the second direction are used to calculate the actual extension of the linear servo. Finally, by comparing the input extension command with the actual extension of the linear servo, it can be determined whether the linear servo has moved into position.

[0041] That is to say, the test device for a linear servo provided by the embodiment of the present invention can not only conveniently adjust the zero position of the linear servo during the zero position test, but also conveniently determine whether the linear servo has moved into position during the displacement test.

[0042] It's easy to understand that when the linear actuator is zeroed, the spacing between the first pin 7 and the second pin 8 in the second direction is the spacing between the fixed and movable ends of the linear actuator, or in other words, the length of the linear actuator at zero. Furthermore, the holes at both ends of the correction rod 9 are identical to those at the fixed and movable ends of the linear actuator, and the center-to-center distance between these holes is equal to the center-to-center distance between the fixed and movable ends of the linear actuator at zero.

[0043] Exemplarily, a plurality of spaced-apart positioning holes and threaded holes are provided on the second support 3 or the third support 4, and a plurality of spaced-apart positioning pins and bolts are movably inserted on the dial 6, each positioning pin is inserted in a corresponding positioning hole, and each bolt is inserted in a corresponding threaded hole, so that the positioning between the support and the dial 6 is achieved by the positioning pins, and the connection between the support and the dial 6 is achieved by the bolts.

[0044] Exemplarily, the first pin 7 and the second pin 8 are T-shaped structures, and the free ends are locked by nuts.

[0045] Figure 4 This is a schematic diagram of the principle of the test device provided by the embodiment of the utility model. Figure 4 As shown, point O is the position of the rotating shaft 5 (i.e., the center of rotation of the rocker arm 10), point A is the position of the first pin 7 (corresponding to the fixed end of the linear servo), point B is the position of the second pin 8 (the position of the movable end of the linear servo at zero point), and point C is the position of the movable end of the linear servo when the rocker arm 10 rotates β. Among them, β can be determined by reading the dial 6 and is a known quantity. The length of AB is L0 (i.e., the length of the linear servo at zero point, that is, the corresponding distance between the first pin 7 and the second pin 8), which is a known quantity that can be directly measured. The length of OB and OC is R, which is a known quantity that can be directly measured (i.e., the length of the rocker arm). The length of AC is L, that is, the length of the linear servo after the rocker arm 10 rotates β, the length of EC is △Y, the length of CD is △X, and the actual extension of the linear servo is △L, which satisfies the following formula:

[0046] △X=R*sinβ; (1)

[0047] △Y=RR*cosβ; (2)

[0048] For right triangle ACE: L 2 =(△Y) 2 +(L0+△X) 2 ;(3)

[0049] △L=L-L0; (4);

[0050] L can be calculated by formulas (1)-(3), and on this basis, △L can be finally calculated by formula (4). By comparing the input extension command and the actual extension of the linear servo, it can be determined whether the linear servo has moved to the correct position.

[0051] In one implementation of the present invention, the first support 2 is movably arranged on the base plate 1 along the second direction.

[0052] In the above embodiment, the movable arrangement of the first support 2 can facilitate the position of the first support 2 on the base plate 1, thereby adjusting the position of the first pin 7, and then adjusting the distance between the first pin 7 and the second pin 8 in the second direction, so that the measurement of linear servos of different (sizes) can be achieved, that is, only the correction rod 9 needs to be replaced and the position of the first support 2 needs to be moved to meet the test requirements.

[0053] Furthermore, the base plate 1 has a plurality of spaced-apart mounting holes 11 extending along the second direction. Bolts are mounted on the first support 2, and the bolts are inserted into corresponding mounting holes 11. Specifically, the first support 2 is slid into the corresponding mounting holes 11 according to the actual size of the linear servo and then locked with the bolts.

[0054] Exemplarily, the first support 2 , the second support 3 and the third support 4 are all T-shaped structures, and the bottoms thereof are fixed to the base plate 1 by bolts.

[0055] Figure 5 This is a schematic diagram of the structure of the pointer provided by the embodiment of the utility model. Figure 5 As shown, an arc portion 511 is provided at one end of the pointer 51 facing the rotating shaft 5 , and a plurality of bolts are inserted into the arc portion 511 to connect with the rotating shaft 5 .

[0056] In the above embodiment, the pointer 51 and the rotating shaft 5 can be conveniently connected through the cooperation between the arc portion 511 and the rotating shaft 5 .

[0057] Furthermore, a reinforcing rib 512 is provided on the pointer 51 . The reinforcing rib 512 is a triangular structure, and two sides of the reinforcing rib 512 respectively connect the pointer 51 and the arc-shaped portion 511 , thereby increasing the connection strength between the pointer 51 and the arc-shaped portion 511 through the reinforcing rib 512 .

[0058] Figure 6 This is a schematic diagram of the structure of the rocker arm provided by the embodiment of the utility model. Figure 7 This is a schematic diagram of the structure of the rotating shaft provided by the embodiment of the utility model, combined with Figure 6 and Figure 7 As shown, a connecting portion 101 is provided at one end of the rocker arm 10 , and a square notch 52 is provided on the outer peripheral wall of the rotating shaft 5 . The connecting portion 101 is inserted into the square notch 52 and connected together by bolts.

[0059] In the above embodiment, the rocker arm 10 and the rotating shaft 5 are connected by a square structure to avoid relative rotation between the two, thereby ensuring that the rotation of the rocker arm 10 is accurately transmitted to the rotating shaft 5.

[0060] Exemplarily, the rocker arm 10 is a special-shaped structure, with a flat portion 102 at the top, on which the second pin 8 can be inserted, and a bottom connecting portion 101 thereof is a U-shaped structure that matches the square notch 52 .

[0061] In this embodiment, bearings are installed on the second support 3 and the third support 4, and both ends of the rotating shaft 5 are installed in the corresponding bearings. The bearings can reduce the friction between the rotating shaft 5 and the supports when it rotates.

[0062] In addition, the base plate 1, the first support 2, the second support 3 and the third support 4 are all steel structures, thereby increasing the structural strength.

[0063] Exemplarily, the first support 2 , the second support 3 and the third support 4 are made of 45GB / T711-2008 steel plate material and are subjected to rust-proof treatment.

[0064] In one implementation of the present invention, the graduation value of the angle scale line on the scale plate 6 is 0.2°, thereby improving the reading accuracy of the rotation of the shaft 5.

[0065] For example, the minimum division of the angle scale line on the dial 6 is 0.2°, the long angle scale line is every 2°, and the second long angle scale line is every 1°. In order to ensure the alignment accuracy of the pointer 51, it is necessary to ensure that each scale line passes through the rotation center of the pointer 51.

[0066] It will be easily understood by those skilled in the art that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the present invention.

Claims

1. A test device for a linear servo, characterized in that: The testing device includes a support assembly and a transmission assembly; The support assembly comprises a base plate (1), a first support (2), a second support (3), a third support (4) and a rotating shaft (5); the first support (2), the second support (3) and the third support (4) are arranged on the base plate (1) at intervals; the rotating shaft (5) is arranged parallel to the base plate (1) and at intervals and extends along a first direction; both ends of the rotating shaft (5) are rotatably inserted on the second support (3) and the third support (4) respectively; a pointer (51) arranged radially along the rotating shaft (5) is detachably mounted on the outer peripheral wall of the rotating shaft (5); a dial (6) with angular scale lines is provided on the second support (3) or the third support (4), so that the pointer (51) can read the value after rotating relative to the dial (6); The transmission assembly comprises a first pin shaft (7), a second pin shaft (8), a correction rod (9) and a rocker arm (10), wherein the first pin shaft (7) and the second pin shaft (8) are arranged parallel to the base plate (1) and extend in a first direction, the first pin shaft (7) is inserted on the first support (2), the correction rod (9) is arranged parallel to and spaced from the base plate (1), and the axial direction of the correction rod (9) extends in a second direction, one end of the correction rod (9) is detachably mounted on the first pin shaft (7), one end of the rocker arm (10) is fixed on the outer wall of the rotating shaft (5), the second pin shaft (8) is inserted on the other end of the rocker arm (10), and the other end of the correction rod (9) is detachably mounted on the second pin shaft (8).

2. A testing device for a linear servo according to claim 1, characterized in that: The first support (2) is movably arranged on the base plate (1) along a second direction.

3. A testing device for a linear servo according to claim 2, characterized in that: The bottom plate (1) has a plurality of installation holes (11) arranged at intervals, and the plurality of installation holes (11) extend along the second direction. Bolts are inserted into the first support (2), and the bolts are inserted into the corresponding installation holes (11).

4. A testing device for a linear servo according to claim 1, characterized in that: An arc-shaped portion (511) is provided at one end of the pointer (51) facing the rotating shaft (5), and a plurality of bolts are inserted into the arc-shaped portion (511) to connect with the rotating shaft (5).

5. The testing device for a linear servo according to claim 4, characterized in that: The pointer (51) is provided with a reinforcing rib (512), the reinforcing rib (512) is a triangular structure, and two sides of the reinforcing rib (512) are respectively connected to the pointer (51) and the arc portion (511).

6. The testing device for a linear servo according to claim 1, characterized in that: One end of the rocker arm (10) is provided with a connecting portion (101), and the outer peripheral wall of the rotating shaft (5) is provided with a square notch (52). The connecting portion (101) is inserted into the square notch (52) and is connected together by bolts.

7. A testing device for a linear servo according to any one of claims 1 to 6, characterized in that: The second support (3) and the third support (4) are both inserted with bearings, and both ends of the rotating shaft (5) are inserted in the corresponding bearings.

8. A testing device for a linear servo according to any one of claims 1 to 6, characterized in that: The second support (3) or the third support (4) is provided with a plurality of positioning holes and threaded holes arranged at intervals, and the scale plate (6) is movably inserted with a plurality of positioning pins and bolts arranged at intervals, each positioning pin is inserted in a corresponding positioning hole, and each bolt is inserted in a corresponding threaded hole.

9. A testing device for a linear servo according to any one of claims 1 to 6, characterized in that: The base plate (1), the first support (2), the second support (3) and the third support (4) are all steel structures.

10. A testing device for a linear servo according to any one of claims 1 to 6, characterized in that: The graduation value of the angle scale line on the scale plate (6) is 0.2°.

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