CN103424222B - Testing device for multidirectional dynamic force of medium and small sized linear motors - Google Patents

Abstract

The invention discloses a multidirectional dynamic force testing device for small and medium-sized linear motors, which is used for dynamic and accurate testing of tangential force and vertical force of small and medium-sized linear motors. The base (100) is mainly driven and supported by a slewing support (600). , a rotating track (200), a tangential sensing device (300), a speed measuring device (400) and a motor suspension device (500) that supports and fixes the measured linear motor (700); the rotating track (200) is placed on the base ( 100) In the middle part, the tangential sensing device (300), the speed measuring device and the motor suspension device (500) are all connected to the base (100) by bolts. The invention can realize the simulation of the use environment of the linear motor, meet the test and installation requirements of the linear motor within a certain size range, and can test the tangential and vertical dynamic forces of the motor.

Description

A multi-directional dynamic force testing device for small and medium-sized linear motors

technical field

The present invention relates to a dynamic sensing test method for vertical force and tangential force of a linear motor and the design of a test device structure, in particular to a real-time dynamic test for the dynamic vertical force and tangential force between a small and medium-sized linear motor and a track test device.

Background technique

Linear motors can directly convert electrical energy into mechanical energy of linear motion without any intermediate conversion mechanism. It is similar in principle to ordinary rotating motors. It can be regarded as a rotating motor that is cut radially and developed into a plane. Its types are the same as traditional motors, such as: DC linear motor, AC permanent magnet synchronous linear motor, AC induction asynchronous linear motor, stepping linear motor, etc. As a linear servo motor that can control the motion accuracy appeared in the late 1980s, with the development of materials (such as permanent magnet materials), power devices, control technology and sensing technology, the performance of linear servo motors has been continuously improved, and the cost is increasing. decline, creating conditions for its wide application.

In recent years, with the development of science and technology, linear motors and their drive control technology have made great progress, and their performances such as thrust, speed, acceleration, resolution, etc. The variety of motor products is the same as that of rotary motors, covering a wide range, which can meet the requirements of different use occasions; at the same time, with the progress of key technologies such as materials and controls, the cost of linear motors has dropped significantly, installation and maintenance have become increasingly convenient, and reliability has been improved. improve, making it more and more widely used. For example, in the field of CNC machine tools, the traditional transmission system includes intermediate transmission links such as motors, transmission pairs, clutches, etc., resulting in large moments of inertia, elastic deformation, backlash and motion hysteresis. Such problems are difficult to fundamentally solve; The linear motor can turn the rotary motion of the spindle into a direct drive, which can improve the performance of the machine tool. Another example is in the field of transportation, the emergence of high-power linear motors makes the linear drive of vehicles a reality, including light rail vehicles and maglev trains, especially in the field of maglev trains, due to its special non-contact operation and small running resistance, linear motors are used to drive become a high-efficiency drive mode.

In the current research and industrial production of linear motors, the driving efficiency and process design problems of linear motors are considered more, and linear motors have two remarkable characteristics in the operation process. In addition to the tangential force, which is the force driving forward, there will also be a vertical suction force, which will increase the burden on the levitation electromagnet during the operation of the maglev train; The vertical reaction force between the rails is a dynamic force, which changes with the speed of movement, and this change will also cause difficulties in the suspension stability control of the maglev train. Therefore, in the application process of linear motors, the test of these two dynamic forces has become a key issue in the use of linear motors, while the previous test device is a static process, that is, there is no relative motion between the track and the motor, only It can test the static force, and at the same time, a set of test equipment can only meet the test requirements of one type of motor, which leads to the need to design a separate test device for the test of each type of linear motor.

The present invention proposes a new multi-directional dynamic force testing device for small and medium-sized linear motors. By setting a rotating track, an adjustable motor installation device and a sensing test device, not only the vertical and tangential dynamic force tests of the linear motor can be realized , and can also meet the installation requirements of linear motors within a certain range through the adjustment of the installation device.

Contents of the invention

In view of the above deficiencies in the prior art, the object of the present invention is to provide a sensor testing device for linear motor dynamic force testing, so that it can realize the movement between the motor and the track through the rotating track, and the two sensors can be tested by the sensor testing device. The vertical and tangential dynamic forces between the two are tested, and at the same time, the installation requirements of motors within a certain size range are met by setting adjustable motor installation devices and sensing devices.

The technical scheme adopted in the present invention is:

A multi-directional dynamic force testing device for small and medium-sized linear motors, which is used for dynamic and accurate testing of tangential and vertical forces for small and medium-sized linear motors. The testing device is mainly driven and supported by a slewing bearing 600. The tangential sensing device 300, the speed measuring device 400 and the motor suspension device 500 supporting and fixing the measured linear motor 700 are composed; Bolts are connected to the base 100 .

The motor suspension device 500 is mainly composed of a lateral support seat 501, a pin-type load sensor 502, an adjustment stud 503, a lateral connection device 504, and an installation column 505; the lower end of the installation column is connected with the test device base 100 through bolts, and the upper end of the installation column Four horizontal support seats are installed through bolts, and different installation positions of the horizontal support seats can be realized by changing the position of the installation holes, meeting the installation requirements of linear motors of different sizes; an adjustment stud 503 is installed at the lower end of the transverse support seat, and the adjustment studs It is connected with the support seat by a pin shaft, and the pin shaft adopts a pin shaft type load sensor; the lower end of the adjustment stud is connected with the four installation positions of the measured linear motor 700; one end of the horizontal connection device 504 is connected with the support seat, and the other end is connected with the measured The linear motor 700 is connected.

The tangential sensing device 300 is mainly composed of an adjusting push rod 301, a tension-compression load sensor 302 and an installation column 303; the installation column 303 is connected to the test device base 100 by bolts; the two ends of the tension-compression load sensor 302 are inner Thread, one end is connected to the installation column by bolts, and the other end is connected to the adjustable ejector rod with adjustable length to meet the installation requirements of linear motors of different sizes; both ends of the linear motor to be tested are equipped with tangential sensing devices, through the ejector rod 301 limits the displacement of the linear motor and tests the tangential force of the motor.

The test device for multidirectional dynamic force testing of small and medium-sized linear motors of the present invention realizes the movement between the linear motor and the track by setting a rotating track in the test device, thereby truly simulating the use environment of the linear motor; through the adjustable motor installation device , can meet the installation requirements of motors within a certain size range, and can adjust the gap between the motor and the track, so as to test the dynamic force under multi-gap values; at the same time, by setting the pin shaft type in the adjustable motor installation device The load sensor is used to test the vertical dynamic force of the motor, and to test the tangential dynamic force of the motor by setting adjustable tension and compression load sensing devices at both ends of the motor.

Through this test device applied to the multi-directional dynamic force test of small and medium-sized linear motors, the simulation of the use environment of linear motors can be realized and the testing and installation requirements of linear motors within a certain size range can be met, and the tangential and vertical direction of the motor can be tested. The dynamic force is tested.

Description of drawings

Figure 1 is a front view of a multi-directional dynamic force testing device for small and medium-sized linear motors.

Figure 2 Top view of the multi-directional dynamic force test device for small and medium-sized linear motors

Fig. 3 is a front view of the motor suspension device.

Figure 4 is a top view of the motor suspension

Figure 5 is a side view of the motor suspension.

Fig. 6 is a front view of the tangential sensing device.

Figure 7 is a side view of the tangential sensing device.

Detailed ways

The structure and function of the present invention will be described in further detail below in conjunction with the accompanying drawings.

Working process of the present invention:

Combining Figure 1 and Figure 2, it can be seen that the rotating track is installed in the center of the base through the slewing bearing, and can be rotated under the drive of the linear motor to realize the movement between the two; the linear motor is located at the center of the rotating track through the motor installation device. Above, the motor realizes the vertical displacement adjustment of the motor through the adjustable stud in the installation device, so as to achieve the purpose of adjusting the gap between the motor and the track; the test of the vertical force of the linear motor is realized through the pin type load sensor in the installation device; The tangential sensing device is located at both ends of the linear motor, which can not only limit the motion of the linear motor, but also realize the test of the tangential force through the tension-compression sensor in the device; the test device is also equipped with a rotating track speed measuring device , the purpose of testing the linear velocity between the motor and the track is achieved by testing the speed of the track.

It can be seen from Fig. 2 that the motor suspension device is provided with a transverse support seat, and by adjusting the installation position of the transverse support seat, the installation requirements of motors of different sizes are met; the connection between the transverse support seat and the motor is realized by adjusting the studs, By adjusting the length of the stud, the up and down position adjustment of the motor is realized, and the purpose of adjusting the gap between the motor and the track is achieved; the horizontal support seat and the adjustment stud are connected by a pin shaft, and the pin shaft adopts a pin shaft load sensor, which can To meet the installation requirements, the vertical force of the motor can also be tested through the sensor; the motor suspension device is also equipped with a horizontal connection device to limit the lateral movement of the linear motor.

Combining with Figure 3, it can be seen that a tangential sensing device is provided at both ends of the linear motor, and there is a tension-compression load sensor in the device, which can test the tangential force of the motor; there is an adjusting push rod between the sensor and the motor , the longitudinal position of the linear motor can be constrained by the ejector rod, and because the length of the ejector rod can be adjusted, it can be applied to the installation and testing of motors of different sizes.

Example

1 to 7 illustrate an embodiment of the present invention:

The small and medium-sized linear motor multi-directional dynamic force test device is equipped with a rotating track, which is connected to the base through a slewing bearing, and can generate rotational motion under the action of the tangential force of the linear motor. Under the action of the sensing device, it remains motionless to realize the movement between the motor and the track; while the dynamic vertical force between the linear motor and the track is measured by the pin-type load sensor in the motor suspension device, and the dynamic tangential force It is measured by the tension-compression load sensor in the tangential sensing device; there is also a track speed measuring device in the device, which is used to test the speed of the track and convert it into the linear motion speed between the tested motor and the track, so that the dynamic force The size of can be related to the speed.

The measured linear motor is connected to the installation column by adjusting the stud and the lateral support seat. By adjusting the length of the stud, the level of the measured motor and the gap between the motor and the track can be adjusted. By adjusting the position of the lateral support seat, It can meet the installation requirements of linear motors within a certain range of sizes; the connection between the adjustment stud and the lateral support seat is connected by a pin-type load sensor, which can not only play the role of bearing force, but also measure the bearing force ; There is also a beam connection device between the motor under test and the installation column, which can limit the lateral displacement of the motor under test.

The tangential sensing device is equipped with a tension-compression load sensor, which is used to measure the dynamic tangential force between the linear motor and the track; the two ends of the sensor are internally threaded holes, one of which is connected to the mounting column by bolts, and the other end is connected to the Adjust the ejector rod. By adjusting the length of the ejector rod, the distance between the sensor and the end of the linear motor can be adjusted, so as to meet the installation and test requirements of linear motors of different sizes.

Claims (3)

1. the multidirectional dynamic force test device of middle-size and small-size linear electric motors, test for middle-size and small-size linear electric motors tangential force and the dynamically accurate of vertical force, it is characterized in that, proving installation drives primarily of pivoting support (600) and the base (100), swing-around trajectory (200), tangential sensing device (300), the speed measuring device (400) that support and to support and the suspension device of motor (500) of fixing tested linear electric motors (700) forms; Swing-around trajectory (200) is placed in base (100) middle part, and tangential sensing device (300), speed measuring device are all connected with base (100) by bolt with suspension device of motor (500).

2. the multidirectional dynamic force test device of the middle-size and small-size linear electric motors of one according to claim 1, it is characterized in that, described suspension device of motor (500) is primarily of cross-brace seat (501), pin type load transducer (502), adjustment stud (503), cross-connecting apparatus (504) and install column (505) composition; Column lower end is installed be connected with proving installation base (100) by bolt, column upper end is installed and by bolt, four cross-brace seats is installed, the different installation site of cross-brace seat can be realized by the change of position of mounting hole, meet the installation requirements of different size linear electric motors; Cross-brace seat lower end is provided with and regulates stud (503), and regulate stud and supporting seat to adopt pinned connection, bearing pin adopts pin type load transducer; Stud lower end is regulated to be connected with four installation sites of tested linear electric motors (700); One end of cross-connecting apparatus (504) is connected with supporting seat, and the other end and tested linear electric motors (700) are connected.

3. the multidirectional dynamic force test device of the middle-size and small-size linear electric motors of one according to claim 1, it is characterized in that, described tangential sensing device (300) is primarily of adjustment push rod (301), drawing and pressing type load transducer (302) and install column (303) composition; Column (303) is installed be connected with proving installation base (100) by bolt; The two ends of drawing and pressing type load transducer (302) are internal thread, and one end is connected with installation column by bolt, and the other end is connected with the adjustment push rod of adjustable in length the installation requirements meeting different size linear electric motors; The two ends of tested linear electric motors are all provided with tangential sensing device, by the displacement of push rod (301) straight limit motor and the tangential force of testing of electric motors.