Measuring mechanism and method for measuring rotation angle of rocker arm

Abstract

The invention belongs to the field of measurement, and relates to a measuring mechanism and method for measuring the rotation angle of a rocker arm. Comprising an angle measuring disc, a first adjusting knob, a first connecting rod, a first suction cup, a second connecting rod, a second suction cup, a third suction cup and an adjusting rod, each of the first sucker, the second sucker and the third sucker comprises a mounting rod and a sucker body; one end of the first connecting rod is hinged with the mounting rod of the first sucker as a hinge point A, and the other end of the first connecting rod is simultaneously hinged with the end part of the first adjustable connecting rod and the central point of the angle measuring disc as a hinge point B; one end of the second connecting rod is hinged with the mounting rod of the second sucker as a hinge point D, and the other end of the second connecting rod is hinged with the middle section of the adjusting rod as a hinge point C; the end part of the second adjustable connecting rod is hinged with the mounting rod of the third sucker as a hinge point E; an arc-shaped through groove is formed in the angle measuring disc, and the first adjusting knob is arranged at the arc-shaped through groove and used for fixing the first connecting rod and the angle measuring disc.

Description

Technical Field

[0001] The invention belongs to the field of measurement, and relates to a measuring mechanism and method which can be used to measure the rotation angle of a rocker arm. Background Art

[0002] When adjusting the aircraft control system on board, only the input and output of the control system are often specified, while the swing arm angle of the intermediate link is only theoretically calculated and not specified, and it is difficult to measure, resulting in large differences in the swing arm angle of the same model and the same batch of aircraft. The displacement sensor indirectly measures the swing arm angle of the intermediate rocker arm and converts it into input displacement and transmits it to the flight parameter recorder. As a result, the displacement sensor has a large error. The existing level is large in size and cannot dynamically measure the swing arm angle, and cannot measure horizontal rotation. The traditional protractor needs to be placed near the shaft for reading. Due to the space limitation near the shaft, the manually fixed protractor has a large error. Summary of the invention

[0003] Purpose of the invention: To provide a measuring mechanism and method for measuring the rocker arm angle, so as to solve the problem of difficulty in measuring the rocker arm angle on board and insufficient space.

[0004] Technical solution:

[0005] A measuring mechanism for measuring the rotation angle of a rocker arm, comprising: an angle measuring disc 1, a first adjusting knob 2, a first connecting rod 3, a first suction cup 4, a second connecting rod 6, a second suction cup 7, a third suction cup 9, and an adjusting rod, wherein the two ends of the adjusting rod are respectively a first adjustable connecting rod 5 and a second adjustable connecting rod 8; the first suction cup 4, the second suction cup 7, and the third suction cup 9 all comprise a mounting rod and a suction cup body; one end of the first connecting rod 3 is hinged to the mounting rod of the first suction cup 4 as a hinge point A, and the other end of the first connecting rod 3 is hinged to the mounting rod of the first suction cup 4 as a hinge point A. One end is hinged to the end of the first adjustable connecting rod 5 and the center point of the protractor 1 as a hinge point B; one end of the second connecting rod 6 is hinged to the mounting rod of the second suction cup 7 as a hinge point D, and the other end of the second connecting rod 6 is hinged to the middle section of the adjusting rod as a hinge point C; the end of the second adjustable connecting rod 8 is hinged to the mounting rod of the third suction cup 9 as a hinge point E; an arc-shaped through groove is provided on the protractor 1, and the first adjusting knob 2 is arranged at the arc-shaped through groove to fix the first connecting rod 3 and the protractor 1.

[0006] Furthermore, one end of the first connecting rod 3 is sleeved on the outer circle of the hollow pin shaft, and the inner hole of the hollow pin shaft is provided with a thread for connecting with the mounting rod of the first suction cup 4 .

[0007] Furthermore, a positioning screw is provided on the first connecting rod 3 , and the positioning screw passes through the arc-shaped through slot, and a thread is provided on the first adjusting knob 2 to be connected and fixed to the positioning screw.

[0008] Furthermore, the middle section of the adjusting rod is a fixed section, and the two ends are adjusting sections corresponding to the first adjustable connecting rod 5 and the second adjustable connecting rod 8 respectively. The two ends of the fixed end are structures of axial center holes, and straight line grooves are arranged on the sides. Positioning screws are respectively provided on the first adjustable connecting rod 5 and the second adjustable connecting rod 8 and are arranged through the straight line grooves. The second adjusting knob 10 and the third adjusting knob 11 are connected to the positioning screws to fix the fixed end to the adjusting section.

[0009] Furthermore, the protractor disc 1 is provided with scale lines.

[0010] A method for measuring the rocker arm rotation angle is performed by means of the above-mentioned measuring mechanism, and the method comprises:

[0011] When the rocker arm rotation center is determined, the first adjustable link 5 and the second adjustable link 8 are of any length and locked;

[0012] Align the hinge point E with the rotation center O, attach the first adjustable link 5 and the second adjustable link 8 to the rocker arm, and mark the hinge points C and B;

[0013] Install the first suction cup 4 and the second suction cup 7 to the positions marked B and C;

[0014] Install the third suction cup 9 and connect it to the machine body. At this time, parallelograms ODCE and ABCD exist. Loosen the first adjustment knob 2. Move the transparent protractor 1 to align its 0 scale line with the center line on the first adjustable connecting rod 5. Lock the first adjustment knob 2. At this time, the protractor 1 is fixedly connected to the first connecting rod 3.

[0015] When the rocker arm is rotated, the first adjustable connecting rod 5 and the second adjustable connecting rod 8 follow the movement, and the relative rotation angles are consistent. At this time, the reading on the dial is the rocker arm rotation angle.

[0016] A method for measuring the rocker arm rotation angle is performed by means of the above-mentioned measuring mechanism, and the method comprises:

[0017] When the size of two points of the rocker arm and the rocker arm rotation center is determined, BC is respectively matched to the two points and the first adjustable link 5 is locked, and the length of CE is adjusted to the distance between the point closer to the rocker arm rotation center and the rocker arm rotation center O and the second adjustable link 8 is locked;

[0018] Install the first suction cup 4 and the second suction cup 7 to two points determined on the rocker arm;

[0019] Install the third suction cup 9 and connect it to the machine body. At this time, parallelograms ODCE and ABCD exist. Loosen the first adjustment knob 2. Move the transparent protractor 1 to align its 0 scale line with the center line on the first adjustable connecting rod 5. Lock the first adjustment knob 2. At this time, the protractor 1 is fixedly connected to the first connecting rod 3.

[0020] When the rocker arm is rotated, the first adjustable connecting rod 5 and the second adjustable connecting rod 8 follow the movement, and the relative rotation angles are consistent. At this time, the reading on the dial is the rocker arm rotation angle.

[0021] 8. A method for measuring a rocker arm rotation angle, characterized in that the method is performed by means of a measuring mechanism according to any one of claims 1 to 5, and the method comprises:

[0022] When the rocker arm rotation center cannot be determined and the rocker arm size is unknown, if the initial position of the rocker arm is vertical, lock the first adjustable link 5 and attach it to the rocker arm, and mark it at C and B;

[0023] Install the first suction cup 4 and the second suction cup 7 to the positions marked B and C;

[0024] After adjusting the second adjustable link 8 to any length and locking it, so that the first link 3, the second link 6, the first adjustable link 5 and the second adjustable link 8 are in line, fix the suction cup 9, i.e. the hinge E;

[0025] Rotate the rocker arm. During the movement, if the first connecting rod 3 or the second connecting rod 6 is always in the vertical direction, the hinge point E is the rotation point;

[0026] Install the third suction cup 9 and connect it to the machine body. At this time, parallelograms ODCE and ABCD exist. Loosen the first adjustment knob 2. Move the transparent protractor 1 to align its 0 scale line with the center line on the first adjustable connecting rod 5. Lock the first adjustment knob 2. At this time, the protractor 1 is fixedly connected to the first connecting rod 3.

[0027] When the rocker arm is rotated, the first adjustable connecting rod 5 and the second adjustable connecting rod 8 follow the movement, and the relative rotation angles are consistent. At this time, the reading on the dial is the rocker arm rotation angle.

[0028] A method for measuring the rocker arm rotation angle is performed by means of the above-mentioned measuring mechanism, and the method comprises:

[0029] When the rocker arm rotation center cannot be determined and the rocker arm size is unknown, if the initial position of the rocker arm is not vertical, lock the first adjustable connecting rod 5 at any length and attach it to the rocker arm, and mark it at C and B;

[0030] Install the first suction cup 4 and the second suction cup 7 to the positions marked B and C;

[0031] Mark point O on the rocker shaft on the extension line of line AD;

[0032] Adjust the second adjustable link 8 to any length and lock it, so that the first link 3, the second link 6, the first adjustable link 5 and the second adjustable link 8 are in line, and then fix the third suction cup 9, i.e., the hinge E;

[0033] Rotate the rocker arm. During the movement, the first link 3 or the second link 6 is always parallel to the OE direction. At this time, the hinge point E is the rotation point;

[0034] Install the third suction cup 9 and connect it to the machine body. At this time, parallelograms ODCE and ABCD exist. Loosen the first adjustment knob 2. Move the transparent protractor 1 to align its 0 scale line with the center line on the first adjustable connecting rod 5. Lock the first adjustment knob 2. At this time, the protractor 1 is fixedly connected to the first connecting rod 3.

[0035] When the rocker arm is rotated, the first adjustable connecting rod 5 and the second adjustable connecting rod 8 follow the movement, and the relative rotation angles are consistent. At this time, the reading on the dial is the rocker arm rotation angle.

[0036] Beneficial effects:

[0037] The measuring mechanism for measuring the rocker arm rotation angle disclosed in the present invention is specifically a simple parallelogram measuring mechanism, which does not require the use of a level meter and an inclinometer, does not require a manually fixed protractor, does not occupy space at the rotating shaft, and can measure the horizontal direction rotation angle. It is easy to load and unload, and the rocker arm rotation angle can be quickly read after installation. The problem of difficulty in measuring the rocker arm rotation angle on the machine and insufficient space is solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 It is a schematic diagram of a measuring mechanism that can be used to measure the rocker arm rotation angle of the present invention;

[0039] Figure 2 There are two forms of suction cups;

[0040] Figure 3 The following is an installation diagram of a measuring mechanism that can be used to measure the rocker arm rotation angle;

[0041] Figure 4 It is a schematic diagram of the first connecting rod, the second connecting rod, the first adjustable connecting rod and the second adjustable connecting rod after being collinear when the rocker arm rotation center cannot be determined and the rocker arm size is unknown;

[0042] Figure 5 This is a schematic diagram of the rocker arm rotation process when the rocker arm rotation center cannot be determined and the rocker arm size is unknown.

[0043] Among them, 1 is an angle plate, 2 is a first adjusting knob, 3 is a first connecting rod, 4 is a first suction cup, 5 is a first adjustable connecting rod, 6 is a second connecting rod, 7 is a second suction cup, 8 is a second adjustable connecting rod, 9 is a third suction cup, 10 is an adjusting knob, and 11 is an adjusting knob. DETAILED DESCRIPTION

[0044] In order to solve the above technical problems, the present invention provides a measuring mechanism that can be used to measure the rocker arm rotation angle. Figure 1 Shown

[0045] Provided is a simple angle measuring device, which can indirectly measure the rocker arm deflection angle according to the equal diagonal angles of a parallelogram. It consists of 4 connecting rods: a first connecting rod 3, a first adjustable connecting rod 5, a second connecting rod 6, a second adjustable connecting rod 8, (the first connecting rod 3 and the second connecting rod 6 are equal in length; the first adjustable connecting rod 5 and the second adjustable connecting rod 8 are adjustable connecting rods, and the first adjustable connecting rod 5 and the second adjustable connecting rod 8 are coaxial and do not rotate relative to each other), a transparent protractor 1, three adjusting knobs (a first adjusting knob 2, a second adjusting knob 10, and a third adjusting knob 11), and three suction cups (a first suction cup 4, a second suction cup 7, and a third suction cup 9) (connected by threads, detachable, and having two forms, see Figure 2 ). A, B, C, D, and E are hinge points (the hinge points are hollow and can be used for marking and connecting suction cups). The adjustment knob uses friction to lock the relative movement of the two. The protractor is used for reading, and the suction cup is used to connect to the machine body and the rocker arm.

[0046] Combination Figure 1 , providing a simple measuring mechanism. The measuring method is as follows:

[0047] 1. Find the rocker arm rotation center:

[0048] 1.1 The rocker arm rotation center or rocker arm size is known:

[0049] 1.1.1 The center of rotation of the rocker arm is known.

[0050] The first adjustable connecting rod 5 and the second adjustable connecting rod 8 can be of any length and are locked;

[0051] Align the hinge point E with the rotation center O, attach the first adjustable link 5 and the second adjustable link 8 to the rocker arm, and mark the hinge points C and B;

[0052] Install the first suction cup 4 and the second suction cup 7 to the positions marked B and C;

[0053] Install the third suction cup 9 to connect with the machine body, such as Figure 3 At this time, parallelograms ODCE and ABCD exist. Loosen the first adjustment knob 2. Move the transparent protractor 1 to align its 0 scale line with the center line on the first adjustable connecting rod 5. Lock the first adjustment knob 2. At this time, the protractor 1 is fixedly connected with the first connecting rod 3.

[0054] When the rocker arm is rotated, the first adjustable connecting rod 5 and the second adjustable connecting rod 8 follow the movement, and the relative rotation angles are consistent. At this time, the reading on the dial is the rocker arm rotation angle.

[0055] 1.1.2 Rocker arm dimensions are known

[0056] When the size of two points of the rocker arm and the rocker arm rotation center is determined, BC is respectively matched to the two points and the first adjustable link 5 is locked, and the length of CE is adjusted to the distance between the point closer to the rocker arm rotation center and the rocker arm rotation center O and the second adjustable link 8 is locked;

[0057] Install the first suction cup 4 and the second suction cup 7 to two points determined on the rocker arm;

[0058] Install the third suction cup 9 and connect it to the machine body. At this time, parallelograms ODCE and ABCD exist. Loosen the first adjustment knob 2. Move the transparent protractor 1 to align its 0 scale line with the center line on the first adjustable connecting rod 5. Lock the first adjustment knob 2. At this time, the protractor 1 is fixedly connected to the first connecting rod 3.

[0059] When the rocker arm is rotated, the first adjustable connecting rod 5 and the second adjustable connecting rod 8 follow the movement, and the relative rotation angles are consistent. At this time, the reading on the dial is the rocker arm rotation angle.

[0060] 1.2 The rocker arm rotation center cannot be determined and the rocker arm size is unknown:

[0061] When the rocker arm rotation center cannot be determined and the rocker arm size is unknown, if the initial position of the rocker arm is vertical, lock the first adjustable link 5 and attach it to the rocker arm, and mark it at C and B;

[0062] Install the first suction cup 4 and the second suction cup 7 to the positions marked B and C;

[0063] Adjust the second adjustable link 8 to any length and lock it, so that the first link 3, the second link 6, the first adjustable link 5 and the second adjustable link 8 are collinear (such as Figure 4 ) after fixing the suction cup 9, i.e. hinge E (can be installed by hand or on the frame);

[0064] When the rocker arm is rotated, during the movement, if the first connecting rod 3 or the second connecting rod 6 is always in the vertical direction (such as Figure 5 ), at which point the hinge point E is the rotation point;

[0065] Install the third suction cup 9 and connect it to the machine body. At this time, parallelograms ODCE and ABCD exist. Loosen the first adjustment knob 2. Move the transparent protractor 1 to align its 0 scale line with the center line on the first adjustable connecting rod 5. Lock the first adjustment knob 2. At this time, the protractor 1 is fixedly connected to the first connecting rod 3.

[0066] When the rocker arm is rotated, the first adjustable connecting rod 5 and the second adjustable connecting rod 8 follow the movement, and the relative rotation angles are consistent. At this time, the reading on the dial is the rocker arm rotation angle.

[0067] When the rocker arm rotation center cannot be determined and the rocker arm size is unknown, if the initial position of the rocker arm is not vertical, lock the first adjustable connecting rod 5 at any length and attach it to the rocker arm, and mark it at C and B;

[0068] Install the first suction cup 4 and the second suction cup 7 to the positions marked B and C;

[0069] Mark point O on the rocker shaft on the extension line of line AD;

[0070] Adjust the second adjustable link 8 to any length and lock it, so that the first link 3, the second link 6, the first adjustable link 5 and the second adjustable link 8 are collinear (such as Figure 4 ), fix the third suction cup 9, i.e. hinge E (can be installed by hand or on the frame);

[0071] Rotate the rocker arm, and during the movement, the first connecting rod 3 or the second connecting rod 6 is always parallel to the OE direction (such as Figure 5 ), at which point the hinge point E is the rotation point;

[0072] Install the third suction cup 9 and connect it to the machine body. At this time, parallelograms ODCE and ABCD exist. Loosen the first adjustment knob 2. Move the transparent protractor 1 to align its 0 scale line with the center line on the first adjustable connecting rod 5. Lock the first adjustment knob 2. At this time, the protractor 1 is fixedly connected to the first connecting rod 3.

[0073] When the rocker arm is rotated, the first adjustable connecting rod 5 and the second adjustable connecting rod 8 follow the movement, and the relative rotation angles are consistent. At this time, the reading on the dial is the rocker arm rotation angle.

Claims

1. A measuring mechanism for measuring the rotation angle of a rocker arm, characterized in that: include: Angle disc (1), a first adjustment knob (2), a first connecting rod (3), a first suction cup (4), a second connecting rod (6), a second suction cup (7), a third suction cup (9), and an adjustment rod. The two ends of the adjustment rod are respectively a first adjustable connecting rod (5) and a second adjustable connecting rod (8); the first suction cup (4), the second suction cup (7) and the third suction cup (9) all include a mounting rod and a suction cup body; one end of the first connecting rod (3) is hinged to the mounting rod of the first suction cup (4) as a hinge point A, and the other end of the first connecting rod (3) is hinged to the end of the first adjustable connecting rod (5) and the center point of the angle disc (1) as a hinge point B; one end of the second connecting rod (6) is hinged to the mounting rod of the second suction cup (7) as a hinge point D, and the other end of the second connecting rod (6) is hinged to the middle section of the adjustment rod as a hinge point C; the end of the second adjustable connecting rod (8) is hinged to the mounting rod of the third suction cup (9) as a hinge point E; an arc-shaped through groove is provided on the angle disc (1), and the first adjustment knob (2) is provided at the arc-shaped through groove for fixing the first connecting rod (3) and the angle disc (1).

2. The measuring mechanism according to claim 1, characterized in that: One end of the first connecting rod (3) is sleeved on the outer circle of the hollow pin shaft, and the inner hole of the hollow pin shaft is provided with a thread for connecting with the mounting rod of the first suction cup (4).

3. The measuring mechanism according to claim 1, characterized in that: The first connecting rod (3) is provided with a positioning screw which passes through the arc-shaped through slot, and the first adjusting knob (2) is provided with a thread which is connected and fixed to the positioning screw.

4. The measuring mechanism according to claim 1, characterized in that: The middle section of the adjusting rod is a fixed section, and the two ends are adjusting sections corresponding to the first adjustable connecting rod (5) and the second adjustable connecting rod (8) respectively. The two ends of the fixed end are axial center hole structures, and the side surfaces are provided with linear grooves. The first adjustable connecting rod (5) and the second adjustable connecting rod (8) are respectively provided with positioning screws and are arranged through the linear grooves. The second adjusting knob (10) and the third adjusting knob (11) are connected with the positioning screws to fix the fixed end and the adjusting section.

5. The measuring mechanism according to claim 1, characterized in that: The protractor disc (1) is provided with scale lines.

6. A method for measuring the rotation angle of a rocker arm, characterized in that: The method is performed by means of a measuring mechanism according to any one of claims 1 to 5, and the method comprises: When the rocker arm rotation center is determined, the first adjustable connecting rod (5) and the second adjustable connecting rod (8) are of arbitrary lengths and are locked; Align the hinge point E with the rotation center O, attach the first adjustable link (5) and the second adjustable link (8) to the rocker arm, and mark the hinge points C and B; Install the first suction cup (4) and the second suction cup (7) to the positions marked B and C; The third suction cup (9) is installed and connected to the machine body. At this time, parallelograms ODCE and ABCD exist. The first adjustment knob (2) is loosened. The transparent protractor (1) is turned to align its 0 scale line with the center line on the first adjustable connecting rod (5). The first adjustment knob (2) is locked. At this time, the protractor (1) is fixedly connected to the first connecting rod (3). When the rocker arm is rotated, the first adjustable connecting rod (5) and the second adjustable connecting rod (8) follow the movement, and the relative rotation angles are consistent. At this time, the reading on the dial is the rocker arm rotation angle.

7. A method for measuring the rotation angle of a rocker arm, characterized in that: The method is performed by means of a measuring mechanism according to any one of claims 1 to 5, and the method comprises: When the dimensions of two points of the rocker arm and the rocker arm rotation center are determined, BC is respectively matched to the two points and the first adjustable connecting rod (5) is locked, and the length of CE is adjusted to the distance between the point closer to the rocker arm rotation center and the rocker arm rotation center O and the second adjustable connecting rod (8) is locked; Installing the first suction cup (4) and the second suction cup (7) at two determined points on the rocker arm; The third suction cup (9) is installed and connected to the machine body. At this time, parallelograms ODCE and ABCD exist. The first adjustment knob (2) is loosened. The transparent protractor (1) is turned to align its 0 scale line with the center line on the first adjustable connecting rod (5). The first adjustment knob (2) is locked. At this time, the protractor (1) is fixedly connected to the first connecting rod (3). When the rocker arm is rotated, the first adjustable connecting rod (5) and the second adjustable connecting rod (8) follow the movement, and the relative rotation angles are consistent. At this time, the reading on the dial is the rocker arm rotation angle.

8. A method for measuring the rotation angle of a rocker arm, characterized in that: The method is performed by means of a measuring mechanism according to any one of claims 1 to 5, and the method comprises: When the rocker arm rotation center cannot be determined and the rocker arm size is unknown, if the initial position of the rocker arm is vertical, the first adjustable link (5) is locked and attached to the rocker arm, and marks are made at C and B; Install the first suction cup (4) and the second suction cup (7) to the positions marked B and C; After adjusting the second adjustable connecting rod (8) to any length and locking it so that the first connecting rod (3), the second connecting rod (6), the first adjustable connecting rod (5) and the second adjustable connecting rod (8) are collinear, the suction cup 9, i.e. the hinge E, is fixed; When the rocker arm is rotated, if the first connecting rod (3) or the second connecting rod (6) is always in a vertical direction during the movement, the hinge point E is the rotation point; The third suction cup (9) is installed and connected to the machine body. At this time, parallelograms ODCE and ABCD exist. The first adjustment knob (2) is loosened. The transparent protractor (1) is turned to align its 0 scale line with the center line on the first adjustable connecting rod (5). The first adjustment knob (2) is locked. At this time, the protractor (1) is fixedly connected to the first connecting rod (3). When the rocker arm is rotated, the first adjustable connecting rod (5) and the second adjustable connecting rod (8) follow the movement, and the relative rotation angles are consistent. At this time, the reading on the dial is the rocker arm rotation angle.

9. A method for measuring the rotation angle of a rocker arm, characterized in that: The method is performed by means of a measuring mechanism according to any one of claims 1 to 5, and the method comprises: When the rocker arm rotation center cannot be determined and the rocker arm size is unknown, if the initial position of the rocker arm is not vertical, the first adjustable connecting rod (5) is locked at an arbitrary length and attached to the rocker arm, and marked at C and B; Install the first suction cup (4) and the second suction cup (7) to the positions marked B and C; Mark point O on the rocker shaft on the extension line of line AD; The second adjustable connecting rod (8) is adjusted to any length and locked, so that the first connecting rod (3), the second connecting rod (6), the first adjustable connecting rod (5) and the second adjustable connecting rod (8) are collinear, and then the third suction cup (9), i.e. the hinge E, is fixed; The rocker arm is rotated, and during the movement, the first connecting rod (3) or the second connecting rod (6) is always parallel to the direction OE, and the hinge point E is the rotation point; The third suction cup (9) is installed and connected to the machine body. At this time, parallelograms ODCE and ABCD exist. The first adjustment knob (2) is loosened. The transparent protractor (1) is turned to align its 0 scale line with the center line on the first adjustable connecting rod (5). The first adjustment knob (2) is locked. At this time, the protractor (1) is fixedly connected to the first connecting rod (3). When the rocker arm is rotated, the first adjustable connecting rod (5) and the second adjustable connecting rod (8) follow the movement, and the relative rotation angles are consistent. At this time, the reading on the dial is the rocker arm rotation angle.

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