A linear motor thrust testing device

Abstract

The present invention belongs to the technical field of motor testing, and in particular relates to a linear motor thrust testing device. The present invention includes: a test bench; a frame is fixedly connected to the test bench, and a test assembly is connected to the frame. The test assembly includes a connecting seat, and a force sensor is installed at one end of the connecting seat; a sliding rod is fixedly connected to the connecting seat, a pair of slide rails are symmetrically connected to both sides of the sliding rod, and a pressing seat is slidably connected to the sliding rod; and a locking frame is connected to the sliding rod; a limiting mechanism cooperating with the locking frame is fixedly connected to the frame, a guide rod is fixedly connected to the slide rail, the guide rod is slidably connected to the locking frame, and a spring is connected to the surface of the guide rod; by providing a pressing seat, a limiting mechanism and a locking frame, the present invention can measure the maximum static thrust and the maximum dynamic thrust of the linear motor, and the test data is relatively comprehensive, which can comprehensively reflect the maximum thrust condition of the linear motor.

Description

Technical Field

[0001] The present invention relates to the technical field of motor testing, and particularly to a linear motor thrust testing device. Background Art

[0002] After the design and production of a linear motor, it needs to be checked and inspected; a special linear motor testing platform is required to evaluate the motor performance. The role of the linear motor testing platform is to simulate the operating conditions of the motor in the machine tool, and evaluate the motor performance by collecting performance parameters such as the speed and thrust output by the motor; all linear motors need to use a thrust testing tooling to test the motor thrust, and the quality of the thrust testing tooling determines whether the linear motor is damaged, as well as the accuracy and reliability of the thrust testing.

[0003] When the existing linear motor thrust tester tests the maximum thrust of the linear motor, the moving slide of the linear motor is usually directly applied to the force sensor. During the test, the moving slide remains stationary, and the thrust of the motor is continuously increased to test the maximum static thrust of the motor; however, since the moving slide remains stationary during the test, the maximum dynamic thrust in the actual motion state of the linear motor cannot be simulated, resulting in relatively single and one-sided test data, and unable to comprehensively reflect the maximum thrust situation of the linear motor. Summary of the Invention

[0004] Aiming at the deficiencies of the prior art, the present invention provides a linear motor thrust testing device, which can automatically lock and release the locking frame through a limiting mechanism, and can test the maximum thrust data during the stationary and moving processes of the linear motor, aiming to solve the problems in the background art.

[0005] To achieve the above technical purpose, the specific technical solution of the present invention is as follows. A linear motor thrust testing device proposed by the present invention includes: a test bench; a frame is fixedly connected to the test bench, and a test component is connected to the frame. The test component includes a connecting seat, and a force sensor is installed at one end of the connecting seat; a sliding rod is fixedly connected to the connecting seat, a pair of sliding rails are symmetrically connected on both sides of the sliding rod, a pressing seat is slidably connected to the sliding rod, and a locking frame is connected to the sliding rod; a limiting mechanism cooperating with the locking frame is fixedly connected to the sliding rod, and a guiding rod is fixedly connected to the sliding rail, the guiding rod is slidably connected to the locking frame, and a cylindrical spring is connected to the surface of the guiding rod. The cylindrical spring is arranged between the locking frame and the pressing seat; when the linear motor pushes the pressing seat to move towards the locking frame, the limiting mechanism automatically locks and fixes the locking frame; when the pressing seat stops moving, the limiting mechanism automatically releases the locking frame.

[0006] As a preferred technical solution of the present invention, a pair of clamping blocks are fixedly connected to the locking frame, the clamping blocks are slidably connected to the guiding rod, and a clamping groove is provided on the upper surface of the clamping blocks.

[0007] As a preferred technical solution of the present invention, the limiting mechanism includes a fixed frame, the fixed frame is fixedly connected to the sliding rod, a locking column engaged with the card slot is movably connected to the fixed frame, a lifting frame is fixedly connected to the locking column, a lifting rod movably connected to the fixed frame is fixedly connected to the lifting frame, and a compression spring is connected between the lifting frame and the fixed frame.

[0008] As a preferred technical solution of the present invention, a micro generator is installed on the locking frame, the input end of the micro generator is connected with a gear assembly, and a rack matched with the gear assembly is fixedly connected to the pressing seat.

[0009] As a preferred technical solution of the present invention, an electromagnet is installed on the locking frame, the electromagnet is connected to the micro generator through an electric wire, and an iron block matched with the electromagnet is fixedly installed at the lower end of the lifting rod.

[0010] As a preferred technical solution of the present invention, a sliding sleeve is fixedly connected to the locking frame, the sliding sleeve is slidably connected to the sliding rod, a buffer seat is connected to the surface of the sliding rod, and a buffer spring is connected between the buffer seat and the connecting seat.

[0011] As a preferred technical solution of the present invention, a spherical surface portion is provided at the lower end of the locking column. When the compression spring is in a natural state, the spherical surface portion just inserts into the card slot; a locking sleeve is fixedly connected to the fixed frame, and the locking sleeve is fixedly connected to the sliding rod.

[0012] As a preferred technical solution of the present invention, a slider slidably connected to the guide rod is provided on the pressing seat, a sliding groove slidably connected to the slide rail is provided on the side surface of the pressing seat, and a circular sleeve slidably connected to the sliding rod is provided at the center of the pressing seat.

[0013] The beneficial effects of the present invention are as follows:

[0014] 1. By providing a pressing seat, a limiting mechanism and a locking frame, the limiting mechanism can lock and release the locking frame. By applying pressure to the pressing seat through the linear motor mover slide, when the pressing seat directly acts on the limiting mechanism, the maximum static thrust of the linear motor can be directly measured; when the limiting mechanism locks the locking frame, the pressing seat acts on the locking frame through the cylindrical spring, and the maximum dynamic thrust of the linear motor can be tested; making the test data more comprehensive and accurate.

[0015] 2. When testing the maximum dynamic thrust of the linear motor in the present invention, the linear motor drives the pressure seat to move towards the locking frame. During the movement of the pressure seat, it drives the micro-generator to generate electricity. The electromagnet is energized, and the electromagnet attracts the lifting frame to descend, thereby locking and fixing the locking frame. When the maximum thrust of the motor is balanced with the elastic force of the cylindrical spring, the force sensor measures the maximum dynamic thrust of the linear motor. At the same time, the pressure seat stops moving, the electromagnet is instantly powered off, and the lifting frame automatically rises, thus releasing the locking frame. The locking frame will continue to move forward to the buffer seat, thereby releasing the potential energy of the cylindrical spring to protect the linear motor. Brief Description of the Drawings

[0016] Figure 1 It is a schematic structural diagram of a linear motor thrust testing device proposed by the present invention.

[0017] Figure 2 It is a schematic diagram of the testing component and the limiting mechanism proposed by the present invention.

[0018] Figure 3 It is Figure 2 Another perspective schematic diagram.

[0019] Figure 4 It is a schematic structural diagram of the pressure seat proposed by the present invention.

[0020] Figure 5 It is a schematic structural diagram of the locking frame proposed by the present invention.

[0021] Figure 6 It is a schematic structural diagram of the limiting mechanism proposed by the present invention.

[0022] In the figure: 1. Test bench; 2. Frame; 3. Force sensor; 4. Testing component; 41. Slide bar; 42. Pressure seat; 421. Slide block; 422. Rack; 423. Circular sleeve; 424. Chute; 43. Buffer seat; 44. Locking frame; 441. Slide sleeve; 442. Micro-generator; 443. Clamping block; 444. Card slot; 445. Electromagnet; 446. Gear assembly; 45. Slide rail; 46. Connecting seat; 47. Buffer spring; 48. Guide rod; 49. Cylindrical spring; 5. Limiting mechanism; 51. Fixed frame; 52. Locking column; 53. Lifting frame; 54. Lifting rod; 55. Iron block; 56. Compression spring; 57. Spherical surface part; 58. Locking sleeve. Detailed Embodiment

[0023] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0024] Embodiment: This embodiment discloses a linear motor thrust testing device, as Figures 1-6As shown in the figure, it includes: a test bench 1; a frame 2 is fixedly connected to the test bench 1, and a test component 4 is connected to the frame 2. The test component 4 includes a connecting seat 46. One end of the connecting seat 46 is installed with a force sensor 3, and the force sensor 3 is fixedly installed on the frame 2. The force sensor 3 is used to detect the thrust of the linear motor; a slide bar 41 is fixedly connected to the connecting seat 46. A pair of slide rails 45 are symmetrically connected to both sides of the slide bar 41, and the slide rails 45 are fixedly connected to the connecting seat 46. A pressing seat 42 is slidably connected to the slide bar 41, and the pressing seat 42 is also slidably connected to the slide rails 45 at the same time; and a locking frame 44 is connected to the slide bar 41. The locking frame 44 can be fixed on the slide bar 41 or slide on the slide bar 41; a limiting mechanism 5 that cooperates with the locking frame 44 is fixedly connected to the slide bar 41. The limiting mechanism 5 is used to lock and fix the locking frame 44. And a guiding rod 48 is fixedly connected to the slide rail 45. The guiding rod 48 is arranged parallel to the slide rail 45. The guiding rod 48 is slidably connected to the locking frame 44. A cylindrical spring 49 is connected to the surface of the guiding rod 48. The cylindrical spring 49 is arranged between the pressing seat 42 and the locking frame 44. When the linear motor drives the pressing seat 42 to move towards the locking frame 44, the cylindrical spring 49 is compressed by force, and the elastic force continuously increases; among them, the working principle of the limiting mechanism 5 is: when the linear motor pushes the pressing seat 42 towards the locking frame 44, the limiting mechanism 5 automatically locks and fixes the locking frame 44; and as the pressing seat 42 approaches, the elastic force of the cylindrical spring 49 continuously increases. When the maximum thrust of the linear motor is balanced with the elastic force of the cylindrical spring 49, the pressing seat 42 stops moving. At this time, the force sensor 3 measures the maximum thrust of the linear motor. At the same time, the limiting mechanism 5 instantly and automatically releases the locking frame 44, and the locking frame 44 switches from the locked state to the free state. The pressing seat 42 drives the locking frame 44 to move forward together. The moving speed of the locking frame 44 is greater than the moving speed of the pressing seat 42. The cylindrical spring 49 gradually returns to its natural state, releases the potential energy of the cylindrical spring 49, and then cuts off the power supply of the linear motor, avoiding the cylindrical spring 49 from ejecting the moving part slide of the linear motor when suddenly powered off.

[0025] As Figure 4 shown, the pressing seat 42 is provided with a slider 421 slidably connected to the guiding rod 48, and a chute 424 slidably connected to the slide rail 45 is provided on the side of the pressing seat 42, which ensures the stability of the pressing seat 42 when sliding. A circular sleeve 423 slidably connected to the slide bar 41 is provided at the center of the pressing seat 42; a rack 422 that cooperates with the gear assembly 446 is fixedly connected to the pressing seat 42. When the pressing seat 42 moves towards the locking frame 44, the rack 422 drives the gear assembly 446 to rotate.

[0026] As Figure 5As shown, a pair of clamping blocks 443 are fixedly connected to the locking frame 44. The clamping blocks 443 are slidably connected to the guide rod 48, and a clamping groove 444 is provided on the clamping blocks 443. A micro generator 442 is installed on the locking frame 44. The input end of the micro generator 442 is connected to a gear assembly 446. The gear assembly 446 serves to increase the rotational speed of the input end of the micro generator 442. Thus, when the pressing seat 42 moves slowly, the gear assembly 446 will drive the micro generator 442 to generate current. When the pressing seat 42 moves, the rack 422 drives the gear assembly 446 to rotate. An electromagnet 445 is installed at one end of the locking frame 44. The electromagnet 445 is connected to the micro generator 442 through a wire. When the micro generator 442 generates electricity, the electromagnet 445 is in an energized state. In this embodiment, when the pressing seat 42 drives the gear assembly 446 to rotate through the rack 422, the micro generator 442 will generate electricity, and the electromagnet 445 will always be in an energized state. When the pressing seat 42 stops moving, the electromagnet 445 is in a de-energized state.

[0027] As Figure 6 shown, the limiting mechanism 5 includes a fixed frame 51. A locking sleeve 58 is fixedly connected to the fixed frame 51. The locking sleeve 58 is fixedly connected to the sliding rod 41 through bolts. Among them, the fixed frame 51 has sufficient strength to resist the maximum thrust of the linear motor. A locking column 52 that engages with the clamping groove 444 is movably connected to the fixed frame 51. A pair of locking columns 52 are respectively connected to both ends of the fixed frame 51, and the locking column 52 penetrates through the fixed frame 51. By inserting the locking column 52 into the clamping groove 444, the locking frame 44 is locked and fixed. A lifting frame 53 is fixedly connected to the locking column 52. A lifting rod 54 that is movably connected to the fixed frame 51 is fixedly connected to the lifting frame 53. The lifting rod 54 penetrates through the fixed frame 51. An iron block 55 that cooperates with the electromagnet 445 is fixedly installed at the lower end of the lifting rod 54. A compression spring 56 is connected between the lifting frame 53 and the fixed frame 51. The compression spring 56 has elastic force when it is in a compressed state and tensile force when it is in a stretched state. When the pressing seat 42 moves, the electromagnet 445 is energized to attract the iron block 55, driving the lifting rod 54 to descend, so as to completely insert the locking column 52 into the clamping groove 444, realizing the locking and fixing of the locking frame 44. When the pressing seat 42 stops moving, the electromagnet 445 is de-energized, and the lifting frame 53 rises under the elastic force of the compression spring 56, and the locking column 52 disengages from the clamping groove 444, thus releasing the locking frame 44, and the locking frame 44 is in a free state.

[0028] Preferably, a spherical surface portion 57 is provided at the lower end of the locking column 52. When the compression spring 56 is in the natural state, a part of the spherical surface portion 57 is just inserted into the card slot 444, which plays a role in pre-locking the locking frame 44. By pre-locking the locking frame 44 through the spherical surface portion 57, when the pressing seat 42 just starts to move, the cylindrical spring 49 will not drive the locking frame 44 to move, and the position of the locking frame 44 will not move, so as to ensure that the locking column 52 can be completely inserted into the card slot 444. When the maximum thrust of the linear motor is measured, the pressing seat 42 stops moving, and the locking column 52 rises. At this time, the cylindrical spring 49 is in a compressed state, and a large elastic force is applied to the locking frame 44 through the cylindrical spring 49, so that the card slot 444 can be separated from the spherical surface portion 57 of the locking column 52, and then the locking frame 44 can move forward.

[0029] Preferably, a sliding sleeve 441 is fixedly connected to the locking frame 44. The sliding sleeve 441 is slidably connected to the sliding rod 41, and a buffer seat 43 is connected to the surface of the sliding rod 41. A buffer spring 47 is connected between the buffer seat 43 and the connecting seat 46. After the locking frame 44 is separated from the limiting mechanism 5, the locking frame 44 continues to move forward and hits the buffer seat 43. The buffer seat 43 plays a role in buffering and limiting the locking frame 44, and when the locking frame 44 moves to the position of the buffer seat 43, the cylindrical spring 49 is in the natural state and the potential energy is completely released.

[0030] Working principle: This embodiment includes two ways to test the maximum thrust of a linear motor: The first is the maximum static thrust test: Before the test, first move the locking frame 44 to the position of the buffer seat 43. The pressing seat 42 is in direct contact with the limiting mechanism 5, and the linear motor acts directly on the pressing seat 42. During the test, the pressing seat 42 and the limiting mechanism 5 are in a static state. Gradually increase the thrust of the linear motor, and measure the maximum static thrust of the linear motor through the force sensor 3. The second is the maximum dynamic thrust test: Before the test, first pre-engage the limiting mechanism 5 with the locking frame 44, that is, the spherical surface part 57 of the locking column 52 is connected in the card slot 444. The linear motor drives the pressing seat 42 to move towards the locking frame 44. During the movement, the rack 422 drives the micro-generator 442 to generate electricity through the gear assembly 446, energize the electromagnet 445. After the electromagnet 445 is energized, it attracts the lifting frame 53 to descend, and completely locks and fixes the locking frame 44 through the locking column 52, ensuring the stable position of the locking frame 44. As the pressing seat 42 moves, the cylindrical spring 49 is compressed and the elastic force continuously increases. When the elastic force of the cylindrical spring 49 is balanced with the maximum thrust of the linear motor, the pressing seat 42 stops moving. At this time, the force sensor 3 measures the maximum thrust of the linear motor. Since the pressing seat 42 stops moving, the micro-generator 442 stops generating electricity, the electromagnet 445 is powered off, the lifting frame 53 automatically rises and resets under the elastic force of the compression spring 56, the locking frame 44 separates from the limiting mechanism 5 under the greater elastic force of the cylindrical spring 49, the locking frame 44 continues to move forward until it hits the buffer seat 43, and at the same time the pressing seat 42 also continues to move forward under the thrust of the linear motor until it contacts the limiting mechanism 5. Since the moving distance of the locking frame 44 is much greater than that of the pressing seat 42, at this time the cylindrical spring 49 returns to its natural state and the potential energy is released. Then, power off the linear motor to avoid the problem that directly powering off causes the cylindrical spring 49 to bounce the moving part slide of the linear motor in the reverse direction and damage the linear motor.

[0031] Finally, it should be noted that: In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "vertical", "upper", "lower", "horizontal", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present 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 cannot be understood as a limitation to the present invention.

[0032] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A linear motor thrust test device, characterized in that Comprising: A test bench (1); A frame (2) is fixedly connected to the test bench (1), and a test component (4) is connected to the frame (2). The test component (4) includes a connecting seat (46), and a force sensor (3) is installed at one end of the connecting seat (46); A sliding rod (41) is fixedly connected to the connecting seat (46). A pair of sliding rails (45) are symmetrically connected to both sides of the sliding rod (41). A pressing seat (42) is slidably connected to the sliding rod (41), and a locking frame (44) is connected to the sliding rod (41); A limiting mechanism (5) that cooperates with the locking frame (44) is fixedly connected to the sliding rod (41). A guiding rod (48) is fixedly connected to the sliding rail (45). The guiding rod (48) is slidably connected to the locking frame (44). A cylindrical spring (49) is connected to the surface of the guiding rod (48), and the cylindrical spring (49) is arranged between the locking frame (44) and the pressing seat (42); When the linear motor pushes the pressing seat (42) to move towards the locking frame (44), the limiting mechanism (5) automatically locks and fixes the locking frame (44); when the pressing seat (42) stops moving, the limiting mechanism (5) automatically releases the locking frame (44); A pair of clamping blocks (443) are fixedly connected to the locking frame (44). The clamping blocks (443) are slidably connected to the guiding rod (48), and a clamping groove (444) is arranged on the upper surface of the clamping blocks (443); The limiting mechanism (5) includes a fixing frame (51). The fixing frame (51) is fixedly connected to the sliding rod (41). A locking column (52) that engages with the clamping groove (444) is movably connected to the fixing frame (51). A lifting frame (53) is fixedly connected to the locking column (52). A lifting rod (54) that is movably connected to the fixing frame (51) is fixedly connected to the lifting frame (53), and a compression spring (56) is connected between the lifting frame (53) and the fixing frame (51); A micro generator (442) is installed on the locking frame (44). The input end of the micro generator (442) is connected to a gear assembly (446). A rack (422) that cooperates with the gear assembly (446) is fixedly connected to the pressing seat (42); An electromagnet (445) is installed on the locking frame (44). The electromagnet (445) is connected to the micro generator (442) through an electric wire. An iron block (55) that cooperates with the electromagnet (445) is fixedly installed at the lower end of the lifting rod (54).

2. A linear motor thrust testing device according to claim 1, characterized in that, A sliding sleeve (441) is fixedly connected to the locking frame (44). The sliding sleeve (441) is slidably connected to the sliding rod (41). A buffer seat (43) is connected to the surface of the sliding rod (41), and a buffer spring (47) is connected between the buffer seat (43) and the connecting seat (46).

3. A linear motor thrust testing device according to claim 2, characterized in that, A spherical surface portion (57) is arranged at the lower end of the locking column (52). When the compression spring (56) is in a natural state, the spherical surface portion (57) just inserts into the clamping groove (444); A locking sleeve (58) is fixedly connected to the fixing frame (51), and the locking sleeve (58) is fixedly connected to the sliding rod (41).

4. A linear motor thrust testing device according to claim 3, characterized in that, The pressing seat (42) is provided with a slider (421) slidably connected to the guide rod (48), and a sliding groove (424) slidably connected to the slide rail (45) is provided on the side of the pressing seat (42), and a circular sleeve (423) slidably connected to the slide bar (41) is provided at the center of the pressing seat (42).

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