A simple test device for adjusting the zero position of a servo motor

Abstract

A simple test device for adjusting the zero position of a servo motor provided by the present invention improves the existing servo motor test bracket to form the servo motor test bracket involved in the present invention to address the defects existing in the prior art. This servo motor test bracket can make the mechanical zero position coincide with the software zero position without software zero adjustment. Moreover, this servo motor test bracket does not require screw fixation, is convenient and simple to install, and has a small installation error. The potentiometer is installed on the movable block, and the movable block is inserted into the support seat, enabling the relative rotation of the potentiometer and the servo motor, avoiding the angular error in the traditional tooth-to-tooth cooperation, and ensuring the accuracy of the mechanical zero return and software zero return of the servo motor.

Description

Technical Field

[0001] The present invention relates to the field of servo brackets, and particularly to a simple test bracket that can accurately adjust the zero position of a servo. Background Art

[0002] Currently, common servo test brackets are installed according to designed dimensions. The potentiometer and the servo are fixed in advance, and the servo and the potentiometer are installed together by adjusting the coupling. However, since the coupling and the servo have 25 teeth, the minimum step size for adjusting the coupling each time is 14.4°, which makes it difficult to make the mechanical zero position and the software zero position of the servo coincide by adjusting the coupling. Moreover, the gap between the potentiometer and the servo is small, which is inconvenient for operation and prone to installation errors. The traditional solution is to modify the software zero position to make the mechanical zero position and the software zero position of the servo coincide, but for each tested servo, the corresponding software zero position needs to be modified, which is time-consuming and laborious. Summary of the Invention

[0003] The purpose of the present invention is to provide a simple test device for adjusting the zero position of a servo, which solves the deficiencies existing in the prior art.

[0004] To achieve the above purpose, the technical solution adopted by the present invention is as follows:

[0005] A simple test device for adjusting the zero position of a servo provided by the present invention includes a movable clamping block, a steering wheel and a support base. Among them, the movable clamping block is inserted on the side wall of the support base; a through hole is provided on the movable clamping block, one end of the coupling is assembled in the through hole and is connected to a potentiometer fixed on the movable clamping block; the other end of the coupling is connected to the steering wheel, and the steering wheel is connected to a servo installed on the support base.

[0006] Preferably, the output end of the potentiometer is inserted into a through hole provided on the coupling.

[0007] Preferably, the gear groove on the steering wheel is meshed with the rotor of the servo.

[0008] Preferably, the movable clamping block includes a support plate with a key-shaped structure, and a frame-shaped bracket with a frustum structure is provided at the bottom of the support plate; the movable clamping block is inserted into the side wall mounting hole of the support base through the frame-shaped bracket; the potentiometer is installed on the support plate.

[0009] Preferably, the coupling includes a chassis with a circular structure, a threaded hole is provided on the chassis and is bolted to the steering wheel; a shaft column is provided on the chassis, a through hole is provided at the center of the shaft column, and the cross-shaped output shaft of the potentiometer is assembled in the through hole.

[0010] Preferably, a rectangular notch penetrating in the radial direction is provided at the central position of the shaft column, and the rectangular notch is provided along the axial direction; the rectangular notch is used for clamping the output shaft of the cross-shaped structure of the potentiometer.

[0011] Preferably, the servo motor is detachably mounted on the support base.

[0012] Preferably, the support base is a rectangular frame structure.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0014] A simple test device for adjusting the zero position of a servo motor provided by the present invention improves the existing servo motor test bracket to form the servo motor test bracket involved in the present invention in view of the defects existing in the prior art. This servo motor test bracket can make the mechanical zero position coincide with the software zero position without software zero adjustment, and this servo motor test bracket does not require screw fixation, is convenient and simple to install, and has a small installation error; the potentiometer is installed on the movable clamping block, and the movable clamping block is inserted into the support base, so that the relative rotation of the potentiometer and the servo motor avoids the angular error in the traditional tooth-to-tooth cooperation and ensures the accuracy of the mechanical zero return and software zero return of the servo motor. Description of the Drawings

[0015] Figure 1 is the top view of the simple test bracket involved in the present invention;

[0016] Figure 2 is the structural schematic diagram of the movable clamping block involved in the present invention;

[0017] Figure 3 is the structural schematic diagram of the coupling involved in the present invention;

[0018] Among them, 1. Potentiometer 2. Movable clamping block 3. Coupling 4. Steering wheel 5. Support base 6. Servo motor 201. Support plate 202. Frame-shaped bracket 301. Chassis 302. Shaft column 303. Rectangular notch. Detailed Description of the Invention

[0019] The present invention will be further described in detail below with reference to the drawings.

[0020] As Figure 1 shown, a simple test device for adjusting the zero position of a servo motor provided by the present invention includes a movable clamping block 2, a steering wheel 4 and a support base 5. Among them, the movable clamping block 2 is inserted into the side wall of the support base 5.

[0021] A through hole is provided on the movable clamping block 2, and one end of the coupling 3 is assembled in the through hole and is connected to the potentiometer 1 fixed on the movable clamping block 2.

[0022] The output terminal of the potentiometer is inserted into the slot in the coupling 3.

[0023] The other end of the coupling 3 is connected to the steering gear 6 fixed on the support base 5 through the steering wheel 4.

[0024] The coupling 3 and the steering wheel 4 are connected by bolts.

[0025] The gear slot on the steering wheel 4 is meshed and connected with the rotor of the steering gear 6.

[0026] As Figure 2 shown, the movable block 2 includes a support plate 201 in the shape of a key, and a frame-shaped bracket 202 with a frustum structure is arranged at the bottom of the support plate 201. The frame-shaped bracket 202 with the frustum structure is a conical surface with a certain height and angle, and the surface is rough. This structure is different from the traditional steering gear test structure and is convenient for installation and debugging.

[0027] The movable block 2 is inserted into the side wall mounting hole of the support base 5 through the frame-shaped bracket 202 with a frustum structure.

[0028] As Figure 3 shown, the coupling is a 3D printed part; the coupling 3 includes a chassis 301 with a circular structure, a shaft column 302 is arranged on the chassis, and threaded holes are opened on the chassis for cooperation with the steering wheel 4 to realize the transmission of the steering gear torque.

[0029] A through hole and a rectangular notch 303 penetrating in the radial direction are opened at the central position of the shaft column 302, and the rectangular notch 303 is opened along the axial direction; the through hole and the rectangular notch 303 are coaxial; the through hole and the rectangular notch 303 are matched with the cross-shaped output shaft of the potentiometer 1 to realize the connection between the potentiometer and the steering gear, so that the rotation of the steering gear drives the potentiometer to rotate.

[0030] The potentiometer 1 is fixed on the support plate 201.

[0031] The steering gear 6 is installed on the support base 5 in a detachable structure.

[0032] The support base 5 is a rectangular frame structure, which can enhance the fixing effect of the steering gear and is beneficial to the heat dissipation of the steering gear.

[0033] Test process:

[0034] (1) First, fix the steering gear to be tested on the support base 5 and fix it with screws;

[0035] (2) Fix the potentiometer 1 and the movable block 2, and fix the coupling 3 and the steering wheel 4 with screws.

[0036] (3) Power on the steering gear to make the steering gear mechanically return to zero.

[0037] (4) Select a suitable angle to place the coupling and the rudder wheel, and select a matching position to gently place the potentiometer and the movable block.

[0038] (5) Gently rotate the movable block 2 so that it rotates relative to the support seat 5. Monitor the rudder feedback signal in real time through the host computer. When the rudder feedback signal returns to zero (the actual operation is that the rudder feedback signal is less than 0.05), press the movable block forcefully so that the conical rough inclined surface at the bottom of the movable block fits tightly with the support seat 5, thereby realizing the functions of relative rotation and relative rest between the potentiometer and the steering gear.

[0039] The relative rotation of the potentiometer and the steering gear avoids the angular error in the traditional tooth-to-tooth fit, and can ensure the accuracy of mechanical zero return and software zero return (mechanical zero return is when the steering gear control signal returns to zero, and software zero return is when the steering gear feedback signal returns to zero). Since the torsional moment during the steering gear test is not very large, the relative rest between the movable block and the support seat 5 can be realized by pressing, and the performance test of the steering gear can be achieved. At the same time, the problem of inconvenient installation caused by the installation error of using screw threads and screw holes or the change of the steering gear model is avoided by pressing.

Claims

1. A simple test device for adjusting the zero position of a servo, characterized in that, It includes a movable clamping block (2), a coupling (3), a steering wheel (4) and a support base (5). Among them, the movable clamping block (2) is inserted on the side wall of the support base (5); a through hole is provided on the movable clamping block (2), one end of the coupling (3) is assembled in the through hole and is connected to a potentiometer (1) fixed on the movable clamping block (2); the other end of the coupling (3) is connected to the steering wheel (4), and the steering wheel (4) is connected to a steering gear (6) installed on the support base (5); The movable clamping block (2) includes a support plate (201) in a key-shaped structure, and a frame-shaped bracket (202) with a frustum structure is provided at the bottom of the support plate (201); The frame-shaped bracket (202) with the frustum structure is a conical surface with a certain height and angle, and the surface of the frame-shaped bracket (202) is rough.

2. The simple test device for adjusting the zero position of a servo motor according to claim 1, characterized in that, The output end of the potentiometer (1) is inserted into a through hole provided on the coupling (3).

3. The simple test device for adjusting the zero position of a servo motor according to claim 1, characterized in that The gear groove on the steering wheel (4) is meshed and connected with the rotor of the steering gear (6).

4. The simple test device for adjusting the zero position of a steering gear according to claim 1, characterized in that, The movable clamping block (2) is inserted into the side wall mounting hole of the support base (5) through the frame-shaped bracket (202); the potentiometer (1) is installed on the support plate (201).

5. The simple test device for adjusting the zero position of the steering gear according to claim 1, wherein, The coupling (3) includes a chassis (301) in a circular structure, a threaded hole is provided on the chassis, and it is bolted to the steering wheel (4); a shaft column (302) is provided on the chassis, a through hole is provided at the center of the shaft column (302), and the cross-shaped output shaft of the potentiometer (1) is assembled in the through hole.

6. The simple test device for adjusting the zero position of the steering gear according to claim 5, characterized in that, A rectangular notch (303) penetrating in the radial direction is provided at the center position of the shaft column (302), and the rectangular notch (303) is provided along the axial direction; the rectangular notch is used to clamp the cross-shaped output shaft of the potentiometer (1).

7. The simple test device for adjusting the zero position of a steering gear according to claim 1, characterized in that, The steering gear (6) is installed on the support base (5) in a detachable structure.

8. The simple test device for adjusting the zero position of a steering gear according to claim 1, characterized in that The support base (5) is a rectangular frame structure.

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