A rotary servo automatic control clearance testing device and method

Abstract

The present invention provides a rotary servo automatic control clearance test device, comprising: a base plate with T-slots, a servo mounting bracket fixed to the leftmost end of the base plate by T-screws, a connecting shaft connected to the servo mechanical interface, an angle encoder fixed to the connecting shaft, a dedicated locking nut for fixing the angle encoder to the connecting shaft, an angle encoder mounting bracket fixed to the base plate by T-screws, a radial clearance measurement assembly and a torsion bar mounted on the connecting shaft, and an axial clearance measurement assembly fixed to the base plate. The device enables automatic testing of servo clearance, reduces the equipment required for servo performance testing, and only requires a single servo installation to complete testing of servo axial clearance, radial clearance, and loading performance. This reduces installation and disassembly time and costs during servo testing.

Description

Technical Field

[0001] The invention belongs to the technical field of rotary steering gears, and in particular relates to a device and method for testing automatic control clearance of rotary steering gears. Background Art

[0002] Existing rotary servo clearance test devices mostly use manual testing, which involves hanging weights and reading scales. This requires a lot of tooling and fixture equipment, and the servo needs to be clamped multiple times during the servo performance test. The testing process is complicated, time-consuming, and labor-intensive. In addition, manual reading of the scale adds human factors to the servo test data, affecting the servo test accuracy.

[0003] Therefore, it is necessary to provide a device for automatically measuring the control clearance of a rotary steering gear. Summary of the Invention

[0004] In order to solve the above problems, the present invention proposes a rotary servo automatic control clearance test device, which integrates the servo clearance test and loading test design into one device. By utilizing the loading test control system, the automatic testing of the servo clearance is realized, which reduces the equipment required for the servo performance test, simplifies the operation, reduces the cost, improves the work efficiency, and improves the accuracy of the test results.

[0005] The present invention aims to provide a rotary steering gear automatic control clearance test device, the test device comprising: a base plate provided with a T-slot, a steering gear mounting bracket fixed to the leftmost end of the base plate by a T-slot screw, a connecting shaft connected to the steering gear mechanical interface, an angle encoder fixed to the connecting shaft, a special locking nut for fixing the angle encoder to the connecting shaft, an angle encoder mounting bracket fixed to the base plate by a T-slot screw, a radial clearance measurement assembly and a torsion bar mounted on the connecting shaft, and an axial clearance measurement assembly fixed to the base plate.

[0006] The inner hole of the angle encoder passes through the connecting shaft, and the outer shell is fixed on the angle encoder mounting frame by screws.

[0007] The rotary servo automatic control clearance test device provided by the present invention also has the following characteristics: one end of the connecting shaft is provided with a mechanical interface for connecting to the servo product to be tested, and the other end is provided with an external thread that cooperates with a special locking nut, a torsion bar for installing the servo loading test, and a threaded hole for installing the radial clearance measurement component.

[0008] The rotary servo automatic control clearance testing device provided by the present invention also has the following characteristics: the radial clearance measuring device includes a baffle mounted on the connecting shaft, a second drive servo fixed mounting bracket fixed to the angle encoder mounting bracket, a second drive servo fixed to the second drive servo fixed mounting bracket, and an elastic pin mounted on the output rocker arm of the second drive servo.

[0009] The elastic pin is connected or disconnected with the U-shaped groove on the baffle by the extension and contraction of the elastic pin.

[0010] The rotary servo automatic control clearance test device provided by the present invention also has the following characteristics: the axial clearance measurement assembly includes a support frame, a linear bearing, a movable shaft supported by the support bearing and installed in the bearing hole on the left side of the support frame, a first drive servo fixing frame fixed to the support frame, a first drive servo fixed to the first drive servo fixing frame, a tension and pressure sensor fixed to the support frame, and a screw with one end engaging with the tension and pressure sensor and the other end passing through the support frame.

[0011] Both ends of the screw are locked by nuts.

[0012] The rotary steering gear automatic control clearance testing device provided by the present invention also has the feature that the first driving steering gear output rocker arm is connected to the movable shaft via a bolt.

[0013] The rotary servo automatic control clearance test device provided by the present invention also has the following characteristics: one end of the movable shaft is an optical axis, a U-shaped groove and a threaded through hole are provided in the middle, and the other end is an external threaded shaft.

[0014] The optical axis is installed in the bearing hole on the left side of the support frame.

[0015] The U-shaped groove is used to achieve cooperation with the first pin. When the tested servo product rotates, there is no friction between the first pin and the U-shaped groove.

[0016] The external threaded shaft mates with the threaded hole of the tension and pressure sensor.

[0017] The rotary steering gear automatic control clearance testing device provided by the present invention also has the following characteristics: the axis of the movable shaft is parallel to the center line of the connecting shaft and is on the same vertical plane.

[0018] The rotary servo automatic control clearance test device provided by the present invention also has the following feature: a second pin for fixing is inserted into the pin hole formed by the connecting shaft and the servo product to be tested.

[0019] Another object of the present invention is to provide a method for testing the automatic control clearance of a rotary servo, wherein the method uses the testing device as described in any one of the above items.

[0020] Beneficial effects:

[0021] The present invention provides a rotary servo automatic control clearance test device that automatically tests servo clearance, reducing the equipment required for servo performance testing. During testing, only one servo installation is required to complete servo axial clearance, radial clearance, and loading performance testing, reducing installation and disassembly time and costs during servo testing. A host computer sends signals to drive two servos, and a tension and pressure sensor and angle encoder measure angle and tension and pressure values, achieving closed-loop force and angle control. This reduces the impact of human factors on test results and improves test accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solution of the present invention, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0023] Figure 1 A schematic structural diagram of a rotary servo automatic control clearance test device provided by an embodiment of the present invention;

[0024] Figure 2 Schematic diagram of the structure of the axial gap measurement assembly in an embodiment of the present invention;

[0025] Figure 3 Schematic diagram of the structure of the movable shaft in an embodiment of the present invention;

[0026] Figure 4 This is a schematic structural diagram of the connecting shaft in an embodiment of the present invention.

[0027] Among them, 1: tested servo product; 2: servo mounting bracket; 3: first pin; 4: bolt; 5: second pin; 6: axial clearance measurement assembly; 7: connecting shaft; 8: angle encoder mounting bracket; 9: angle encoder; 10: special locking nut; 11: torsion bar; 12: radial clearance measurement device; 13: base plate; 6a: linear bearing; 6b: support bracket; 6c: movable shaft; 6d: first drive servo; 6e: first drive servo fixing bracket; 6f: tension and pressure sensor; 6h: nut; 6i: screw; 12a: baffle; 12b: second drive servo fixing bracket; 12c: second drive servo; 12d: elastic pin. DETAILED DESCRIPTION

[0028] In order to make the technical means, creative features, objectives and effects of the present invention easier to understand, the following embodiments and accompanying drawings specifically illustrate the rotary servo automatic control clearance testing device and method provided by the present invention.

[0029] In the description of the embodiments of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" 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 invention and simplifying the description, rather than indicating or implying 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 invention.

[0030] Furthermore, the terms "first," "second," "third," etc., 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 identified with "first," "second," etc., may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0031] The terms "mounted," "connected," and "connected" should be understood broadly. For example, they can refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in the present invention based on specific circumstances.

[0032] like Figure 1-4 As shown, a rotary servo automatic control clearance test device is provided, the test device comprising: a base plate 13 provided with a T-slot, a servo mounting bracket 2 fixed to the leftmost end of the base plate 13 by a T-slot screw, a connecting shaft 7 connected to the servo mechanical interface, an angle encoder 9 fixed to the connecting shaft 7, a special locking nut 10 for fixing the angle encoder 9 to the connecting shaft 7, an angle encoder mounting bracket 8 fixed to the base plate 13 by a T-slot screw, a radial clearance measuring assembly 12 and a torsion bar 11 mounted on the connecting shaft 7, and an axial clearance measuring assembly 6 fixed to the base plate 13.

[0033] The inner hole of the angle encoder 9 passes through the connecting shaft 7, and the outer shell is fixed to the angle encoder mounting bracket 8 by screws.

[0034] In some embodiments, one end of the connecting shaft 7 is provided with a mechanical interface for connecting to the servo product 1 under test, and the other end is provided with an external thread that cooperates with a special locking nut 10, a torsion bar 11 for installing a servo loading test, and a threaded hole for installing a radial clearance measurement component 12.

[0035] In some embodiments, the radial clearance measuring device 12 includes a baffle 12a mounted on the connecting shaft 7, a second driving servo fixed mounting bracket 12b fixed to the angle encoder mounting bracket 8, a second driving servo 12c fixed to the second driving servo fixed mounting bracket 12b, and an elastic pin 12d mounted on the output rocker arm of the second driving servo.

[0036] The elastic pin 12d is connected or disconnected with the U-shaped groove on the baffle 12a by the extension and contraction of the pin 12d. The extension and contraction of the pin 12d is manually controlled.

[0037] In some embodiments, the axial clearance measuring assembly 6 includes a support frame 6b, a linear bearing 6a, a movable shaft 6c supported by the support bearing 6a and mounted in a bearing hole on the left side of the support frame 6b, a first driving servo fixing frame 6e fixed to the support frame 6b, a first driving servo 6d fixed to the first driving servo fixing frame 6e, a tension and pressure sensor 6f fixed to the support frame 6b, and a screw 6i having one end engaged with the tension and pressure sensor 6f and the other end passing through the support frame 6b.

[0038] Both ends of the screw rod 6i are locked by nuts 6h.

[0039] In some embodiments, the output rocker arm of the first driving servo 6d is connected to the movable shaft 6c via bolts.

[0040] In some embodiments, one end of the movable shaft 6c is an optical axis with a U-shaped groove and a threaded through hole in the middle, and the other end is an external threaded shaft.

[0041] The optical axis is installed in the bearing hole on the left side of the support frame 6b.

[0042] The U-shaped groove is used to achieve cooperation with the first pin 3. When the tested servo product rotates, there is no friction between the first pin 3 and the U-shaped groove.

[0043] The externally threaded shaft cooperates with the threaded hole of the tension and pressure sensor 6f.

[0044] In some embodiments, the axis of the movable shaft 6 c is parallel to the center line of the connecting shaft 7 and is on the same vertical plane.

[0045] In some embodiments, a second pin 5 for fixing is inserted into the pin hole formed by the connecting shaft 7 and the tested steering gear product 1.

[0046] In some embodiments, a method for testing the automatic control clearance of a rotary servo is provided, wherein the method uses a testing device as described in any one of the above items.

[0047] In some embodiments, the specific workflow is as follows:

[0048] When using this device to test the servo product 1, follow the Figure 1 As shown, the servo product 1 under test is mounted on the servo mounting frame 2 using screws. The first pin 3 is inserted into the elongated hole of the connecting shaft 6, and the second pin 5 is inserted into the pin hole formed by the connecting shaft and the servo, completing the installation and securing of the servo product 1 under test. Once the servo product 1 under test is secured, the servo torque loading test can be performed. To perform the axial clearance test, the second pin 5 must first be removed. A command is then sent from the host computer. This command signal drives the rocker arm of the output shaft of the first driving servo 6d to swing, which in turn drives the movable shaft 6c. The movable shaft 6c then drives the first pin 3, driving the servo shaft under test to axially move within the elongated hole of the connecting shaft 7. Simultaneously, the tension force sensor 6f feeds back the force acting on the movable shaft 6c to the host computer, establishing a closed-loop control of the force during the clearance test. Simultaneously, the host computer observes the voltage signal waveform of the servo product 1 under test to determine whether the axial clearance of the servo product 1 meets the requirements. When conducting a radial clearance test, the torsion bar 11, which is used to test the load performance of the servo, is first removed from the square hole of the connecting shaft 7. The ring of the elastic pin 12d is then manually pulled to retract the pin head. The rocker arm of the second driving servo 12c is then rotated until the pin head axis of the elastic pin 12d is coaxial with the center of the baffle 12a. The ring of the elastic pin 12d is then released to connect the elastic pin 12d with the U-shaped groove of the baffle 12a. The host computer then sends a command, which drives the rocker arm of the output shaft of the second driving servo 12c to swing. The elastic pin 12d pushes the baffle 12a, driving the connecting shaft 7 to rotate. The data from the angle encoder 9 is fed back to the host computer. After processing by the host computer, the angle value obtained is the radial clearance value of the servo product 1 under test.

[0049] The above description is merely 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 within the scope of protection of the present invention. The above description is merely a preferred embodiment of the present invention. It should be noted that those skilled in the art can make various improvements and variations without departing from the technical principles of the present invention, and such improvements and variations shall also be considered within the scope of protection of the present invention.

Claims

1. A rotary steering gear automatic control clearance test device, characterized in that: The test device comprises: a base plate with a T-slot, a servo mounting bracket fixed to the leftmost end of the base plate by T-screws, a connecting shaft connected to the servo mechanical interface, an angle encoder fixed to the connecting shaft, a special locking nut for fixing the angle encoder to the connecting shaft, an angle encoder mounting bracket fixed to the base plate by T-screws, a radial clearance measuring assembly and a torsion bar installed on the connecting shaft, and an axial clearance measuring assembly fixed to the base plate. The inner hole of the angle encoder passes through the connecting shaft, and the outer shell is fixed to the angle encoder mounting frame by screws. The radial clearance measuring device includes a baffle mounted on the connecting shaft, a second driving servo fixed mounting frame fixed on the angle encoder mounting frame, a second driving servo fixed on the second driving servo fixed mounting frame, and an elastic pin mounted on the output rocker arm of the second driving servo. The elastic pin is connected or disconnected with the U-shaped groove on the baffle by the expansion and contraction of the elastic pin. The axial clearance measuring assembly includes a support frame, a linear bearing, a movable shaft supported by the support bearing and installed in the bearing hole on the left side of the support frame, a first driving servo fixed frame fixed on the support frame, a first driving servo fixed on the first driving servo fixed frame, a tension and pressure sensor fixed on the support frame, and a screw with one end engaged with the tension and pressure sensor and the other end passing through the support frame. Both ends of the screw are locked by nuts.

2. The rotary steering gear automatic control clearance testing device according to claim 1, characterized in that: One end of the connecting shaft is provided with a mechanical interface for connecting to the servo product to be tested, and the other end is provided with an external thread that cooperates with a special locking nut, a torsion bar for installing the servo loading test, and a threaded hole for installing the radial clearance measurement component.

3. The rotary steering gear automatic control clearance testing device according to claim 1, characterized in that: The first driving steering gear output rocker arm is connected to the movable shaft through a bolt.

4. The rotary steering gear automatic control clearance testing device according to claim 1, characterized in that: One end of the movable shaft is an optical axis, with a U-shaped groove and a threaded through hole in the middle, and the other end is an external threaded shaft. The optical axis is installed in the bearing hole on the left side of the support frame. The U-shaped groove is used to achieve cooperation with the first pin. When the tested servo product rotates, there is no friction between the first pin and the U-shaped groove. The external threaded shaft mates with the threaded hole of the tension and pressure sensor.

5. The rotary steering gear automatic control clearance testing device according to claim 1, characterized in that: The axis of the movable shaft is parallel to the center line of the connecting shaft and is on the same vertical plane.

6. The rotary steering gear automatic control clearance testing device according to claim 1, characterized in that: A second pin for fixing is inserted into a pin hole formed by the connecting shaft and the tested steering gear product.

7. A method for testing the automatic control clearance of a rotary steering gear, characterized in that: The testing method uses the testing device according to any one of claims 1 to 6.

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