Device for calibrating force constant of linear motor

Abstract

The utility model discloses a device for calibrating a force constant of a linear motor, which relates to the technical field of linear motor testing and comprises a base, a sliding table and a force measuring mechanism. An air floating guide rail is arranged on the base, and the sliding table is arranged on the air floating guide rail; the force measuring device is arranged on the base; when the device is used, the motor stator is arranged in the stator mounting groove, the motor rotor is arranged at the bottom of the sliding table, the motor rotor is matched with the motor stator at the moment, the sliding table moves along with the motor rotor when the motor moves, and the tension of the sliding table is detected by the force measuring mechanism; the air floating guide rail is used for installing and guiding the sliding table, so that the motion friction force of the sliding table is greatly reduced, the force measurement of the force measurement mechanism is more accurate, the influence of the friction force on the measured result is small, the force measurement mechanism is particularly friendly to a motor with small thrust, the measured force constant is more accurate, and the output thrust is more accurate when the force measurement mechanism is used.

Description

Technical Field

[0001] The utility model relates to the technical field of linear motor testing, in particular to a device for calibrating the force constant of a linear motor. Background Art

[0002] A linear motor is a phase-changing device that converts rotational motion into linear motion and is an electric transmission device that can directly convert electrical energy into linear mechanical energy.

[0003] Linear motor force constant testing refers to measuring the output characteristics of a linear motor through a test system to determine its key technical parameters such as thrust, speed, and output power. Obtaining the accurate linear motor force constant is particularly important in some situations where precise force control is required.

[0004] In most testing processes in the existing technology, since the motor's mover is directly set on a conventional linear guide for testing, there is a certain friction resistance between the mover and the linear guide when the mover moves. This leads to a greater impact of external friction on the test results during the testing of some small-thrust linear motors, resulting in large deviations in the results.

[0005] In view of this, there is an urgent need for a device for calibrating the force constant of a linear motor. Utility Model Content

[0006] In view of the problems existing in the prior art, the present invention solves the problem with the following technical structure.

[0007] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0008] A device for calibrating the force constant of a linear motor comprises: a base, a slide, and a force measuring mechanism, wherein the base is provided with a stator mounting slot for placing a stator;

[0009] An air-floating guide rail is provided on the base, and the slide is provided on the air-floating guide rail;

[0010] The force measuring mechanism is located on the base and is used to test the pulling force during the movement of the slide.

[0011] It is further characterized in that

[0012] The force measuring mechanism is a dynamometer, and the slide is connected to the force measuring end of the dynamometer.

[0013] An L-shaped plate is provided on the slide, a vertical end of the L-shaped plate is connected to the dynamometer, and a horizontal end of the L-shaped plate is connected to the top surface of the slide.

[0014] A mounting seat is provided on one side of the base, and the dynamometer is arranged on the top end of the mounting seat.

[0015] A first limiting block is provided on the bottom surface of the slide, and a second limiting block is provided on the base. The second limiting block is located on the movement path of the first limiting block.

[0016] A first sensor is provided on the base, and a blocking piece is provided on the slide. When the slide is in an initial position, the blocking piece is located at a detection position of the first sensor.

[0017] A second sensor is provided on the base. When the slide is at the limit position of the mover movement, the blocking piece is located at the detection position of the second sensor.

[0018] A mounting bar is provided on one side of the base, and the first sensor and the second sensor are provided on the mounting bar.

[0019] A strip-shaped mounting groove is provided on the mounting bar, and an extending direction of the strip-shaped mounting groove is consistent with an extending direction of the air-floating guide rail. The first sensor and the second sensor are both slidably arranged in the strip-shaped mounting groove.

[0020] Mounting holes are provided on both sides of the mounting seat.

[0021] The above structure of the utility model can achieve the following beneficial effects:

[0022] During use, the motor stator is placed in the stator mounting groove, and the motor mover is placed at the bottom of the slide. At this time, the motor mover cooperates with the motor stator. When the motor moves, the slide moves with the motor mover, and the force measuring mechanism detects the pulling force of the slide. By using an air-floating guide rail to install and guide the slide, the movement friction of the slide is greatly reduced, so that the force measuring mechanism can measure the force more accurately, and the measured result is less affected by friction, which is especially friendly to small-thrust motors. The measured force constant is more accurate, and the thrust output during use is also more accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the structure of this application;

[0024] Figure 2 This is a schematic diagram of the structure of part of the application;

[0025] Figure 3 This is a structural diagram of the installation strip in this application.

[0026] In the figure: 1. base; 11. stator mounting slot; 12. mounting seat; 2. slide; 21. baffle; 3. force measuring mechanism; 4. air-floating guide rail; 5. mounting bar; 6. first limit block; 7. second limit block; 8. first sensor; 9. second sensor. DETAILED DESCRIPTION

[0027] In order to help those skilled in the art better understand the present invention, the following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0028] It should be noted that the terms "including" and "having" and any variations thereof in the specification and claims of the present invention and the above-mentioned drawings are intended to cover non-exclusive inclusions. For example, a process, method, apparatus, product or equipment that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or are inherent to these processes, methods, products or equipment.

[0029] The following is combined with Figure 1-Figure 3 This application is described in further detail.

[0030] refer to Figure 1-Figure 2 The device shown here is for calibrating the force constant of a linear motor, comprising a base 1, a slide 2, and a force measuring mechanism 3. The base 1 is provided with a stator mounting slot 11 for placing the stator; the base 1 is provided with an air-floating guide rail 4, on which the slide 2 is mounted; and the force measuring mechanism 3 is mounted on the base 1. The force measuring mechanism 3 is used to measure the pulling force of the slide 2 during movement. During use, the motor stator (as shown in B in the figure) is placed in the stator mounting slot 11, and the motor mover (as shown in A in the figure) is placed at the bottom of the slide 2. The motor mover and the stator cooperate. When the motor moves, the slide 2 moves with the motor mover, and the force measuring mechanism 3 detects the pulling force of the slide 2. By using the air-floating guide rail 4 to mount and guide the slide 2, the friction of the slide 2 is greatly reduced, thereby making the force measurement of the force measuring mechanism 3 more accurate and less affected by friction. This is particularly friendly to low-thrust motors. The measured force constant is more accurate, and the thrust output during use is also more accurate.

[0031] During specific implementation, the force measuring mechanism 3 may be a dynamometer, and the slide 2 is connected to the force measuring end of the dynamometer. When the slide 2 moves, the dynamometer measures the force.

[0032] Further optimization is, Figure 1 and Figure 2As shown, in order to make the connection stable and the force measurement accurate, a mounting seat 12 is provided on one side of the base 1, and the dynamometer is provided on the top of the mounting seat 12. An L-shaped plate is provided on the slide 2. The vertical end of the L-shaped plate is connected to the dynamometer, and the horizontal end of the L-shaped plate is connected to the top surface of the slide 2, so that the force measuring direction of the dynamometer is consistent with the movement direction of the slide 2. The L-shaped plate can be connected to the slide 2 by bolts, which is convenient for installation and disassembly.

[0033] like Figure 1 As shown, in order to limit the movement of the slide 2, a first limit block 6 is provided on the bottom surface of the slide 2, and a second limit block 7 is provided on the base 1. The second limit block 7 is located on the movement path of the first limit block 6. In this way, when the slide 2 moves, the first limit block 6 abuts against the side of the second limit block 7, thereby limiting the slide 2 from continuing to move, thereby preventing the slide 2 from moving too much and detaching from the base 1.

[0034] like Figure 2 and Figure 3 As shown, in order to detect the moving position of the motor mover, a first sensor 8 is provided on the base 1, and a baffle 21 is provided on the slide 2. When the slide 2 is in the initial position, the baffle 21 is located at the detection position of the first sensor 8. A second sensor 9 is provided on the base 1. When the slide 2 is in the extreme position of the motor mover movement (the farthest distance at which the motor mover moves away from the dynamometer), the baffle 21 is located at the detection position of the second sensor 9. In this way, the position of the slide 2 is detected by the first sensor 8 and the second sensor 9, thereby achieving the purpose of detecting the position of the motor mover; and, in order to adapt to the detection of different linear motors, a mounting bar 5 is provided on one side of the base 1, and the first sensor 8 and the second sensor 9 are provided on the mounting bar 5. A strip mounting groove is provided on the mounting bar 5, and the extension direction of the strip mounting groove is consistent with the extension direction of the air floatation guide rail 4. The first sensor 8 and the second sensor 9 are both slidably provided in the strip mounting groove. By sliding the first sensor 8 and the second sensor 9 on the mounting bar 5 and being at different positions of the mounting bar 5, detection of different positions is achieved, thereby improving the adaptability of the present application.

[0035] A further optimization is that, in order to facilitate the fixation of the present application, mounting holes are provided on both sides of the mounting seat 12 .

[0036] The working principle of the utility model is as follows: when in use, the motor stator is placed in the stator mounting groove 11, and the motor mover is placed at the bottom of the slide 2. At this time, the motor mover cooperates with the motor stator. When the motor moves, the slide 2 moves with the motor mover, and the force measuring mechanism 3 detects the pulling force of the slide 2; by using the air-floating guide rail 4 to install and guide the slide 2, the movement friction of the slide 2 is greatly reduced, so that the force measuring mechanism 3 can measure the force more accurately, and the measured result is less affected by the friction force, which is especially friendly to the motor with small thrust. The measured force constant is more accurate, and the thrust output during use is also more accurate.

[0037] The above are only preferred embodiments of the present application, and the present invention is not limited to the above embodiments. It is understood that other improvements and variations directly derived or imagined by those skilled in the art without departing from the spirit and concept of the present invention should be considered to be included in the scope of protection of the present invention.

Claims

1. A device for calibrating the force constant of a linear motor, characterized in that: include: A base (1), a slide (2) and a force measuring mechanism (3), wherein the base (1) is provided with a stator mounting groove (11) for placing a stator; An air-floating guide rail (4) is provided on the base (1), and the slide (2) is provided on the air-floating guide rail (4); The force measuring mechanism (3) is on the base (1), and the force measuring mechanism (3) is used to test the pulling force of the slide (2) when it moves.

2. The device for calibrating the force constant of a linear motor according to claim 1, characterized in that: The force measuring mechanism (3) is a dynamometer, and the slide (2) is connected to the force measuring end of the dynamometer.

3. The device for calibrating the force constant of a linear motor according to claim 2, characterized in that: An L-shaped plate is provided on the slide (2), a vertical end of the L-shaped plate is connected to the dynamometer, and a horizontal end of the L-shaped plate is connected to the top surface of the slide (2).

4. The device for calibrating the force constant of a linear motor according to claim 2, characterized in that: A mounting seat (12) is provided on one side of the base (1), and the dynamometer is provided on the top end of the mounting seat (12).

5. The device for calibrating the force constant of a linear motor according to claim 1, characterized in that: A first limiting block (6) is provided on the bottom surface of the slide (2), and a second limiting block (7) is provided on the base (1), wherein the second limiting block (7) is located on the movement path of the first limiting block (6).

6. The device for calibrating the force constant of a linear motor according to claim 1, characterized in that: A first sensor (8) is provided on the base (1), and a baffle (21) is provided on the slide (2). When the slide (2) is in an initial position, the baffle (21) is located at a detection position of the first sensor (8).

7. The device for calibrating the force constant of a linear motor according to claim 6, characterized in that: A second sensor (9) is provided on the base (1); when the slide (2) is at the mover movement limit position, the baffle (21) is located at the detection position of the second sensor (9).

8. The device for calibrating the force constant of a linear motor according to claim 7, characterized in that: A mounting bar (5) is provided on one side of the base (1), and the first sensor (8) and the second sensor (9) are provided on the mounting bar (5).

9. The device for calibrating the force constant of a linear motor according to claim 8, characterized in that: The installation strip (5) is provided with a strip installation groove, the extension direction of the strip installation groove is consistent with the extension direction of the air-floating guide rail (4), and the first sensor (8) and the second sensor (9) are both slidably arranged in the strip installation groove.

10. The device for calibrating the force constant of a linear motor according to claim 4, characterized in that: Mounting holes are provided on both sides of the mounting seat (12).

Images