Linear motor thrust testing device

Abstract

The invention belongs to the technical field of motor testing, and particularly relates to a linear motor thrust testing device. The test bench is fixedly connected with a rack, the rack is connected with a test assembly, the test assembly comprises a connecting seat, and one end of the connecting seat is provided with a force sensor; a sliding rod is fixedly connected to the connecting base, a pair of sliding rails are symmetrically connected to the two sides of the sliding rod, and a pressing base is slidably connected to the sliding rod; the sliding rod is connected with a locking frame; the rack is fixedly connected with a limiting mechanism matched with the locking frame, the sliding rail is fixedly connected with a guide rod, the guide rod is in sliding connection with the locking frame, and the surface of the guide rod is connected with a spring; through the arrangement of the pressing seat, the limiting mechanism and the locking frame, the maximum static thrust and the maximum dynamic thrust of the linear motor can be tested, the test data is comprehensive, and the maximum thrust condition of the linear motor can be comprehensively reflected.

Description

Technical Field

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

[0002] The design and production of linear motors need to be calibrated and inspected; a special linear motor test platform is needed to evaluate the motor performance. The function of the linear motor test platform is to simulate the operating conditions of the motor in the machine tool, and to evaluate the motor performance by collecting the performance parameters such as the speed and thrust output of the motor; linear motors all need to use thrust test fixtures to perform motor thrust tests. The quality of the thrust test fixtures determines whether the linear motor is damaged, as well as the accuracy and reliability of the thrust test.

[0003] When testing the maximum thrust of a linear motor, an existing linear motor thrust testing machine usually places the linear motor's rotor slide directly on a force sensor. During the test, the rotor slide remains stationary and the thrust of the motor is continuously increased, thereby testing the maximum static thrust of the motor. However, since the rotor slide remains stationary during the test, the maximum dynamic thrust of the linear motor in motion in actual applications cannot be simulated, resulting in relatively single and one-sided test data that cannot fully reflect the maximum thrust of the linear motor. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a linear motor thrust testing device, which is equipped with a limit mechanism to automatically lock and release the locking frame, and can test the maximum thrust data of the linear motor during static and moving processes, aiming to solve the problems in the background technology.

[0005] In order to achieve the above technical objectives, the specific technical scheme of the present invention is as follows: a linear motor thrust testing device proposed by the present invention comprises: a test bench; a frame is fixedly connected to the test bench, a test assembly is connected to the frame, the test assembly comprises a connecting seat, 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 pressure 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 guide rod is fixedly connected to the slide rail, the guide rod is slidably connected to the locking frame, a cylindrical spring is connected to the surface of the guide rod, and the cylindrical spring is arranged between the locking frame and the pressure seat; when the linear motor pushes the pressure seat to move in the direction of the locking frame, the limiting mechanism automatically locks and fixes the locking frame; when the pressure 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 guide rods, and clamping grooves are provided on the upper surfaces of the clamping blocks.

[0007] As a preferred technical solution of the present invention, the limiting mechanism includes a fixed frame, which is fixedly connected to the sliding rod, and the fixed frame is movably connected with a locking column engaged with the slot, and the locking column is fixedly connected with a lifting frame, and the lifting frame is fixedly connected with a lifting rod movably connected to the fixed 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, a gear assembly is connected to the input end of the micro-generator, and a rack matching the gear assembly is fixedly connected to the pressure 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 wires, and an iron block cooperating 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, and 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 portion is provided at the lower end of the locking column, and when the compression spring is in a natural state, the spherical portion is just inserted into the slot; a locking sleeve is fixedly connected to the fixing frame, and the locking sleeve is fixedly connected to the sliding rod.

[0012] As a preferred technical solution of the present invention, the pressure seat is provided with a slider slidably connected to the guide rod, and the side of the pressure seat is provided with a slide groove slidably connected to the slide rail, and the center of the pressure seat is provided with a round sleeve slidably connected to the slide rod.

[0013] The beneficial effects of the present invention are: 1. The present invention is provided with a pressure seat, a limit mechanism and a locking frame. The limit mechanism can lock and release the locking frame, and pressure is applied to the pressure seat through the linear motor mover slide. When the pressure seat directly acts on the limit mechanism, the maximum static thrust of the linear motor can be directly measured; when the limit mechanism locks the locking frame, the pressure seat acts on the locking frame through the cylindrical spring, and the maximum dynamic thrust of the linear motor can be tested, so that the test data is more comprehensive and accurate.

[0014] 2. When testing the maximum dynamic thrust of the linear motor, the present invention drives the pressure seat to move toward the locking frame. During the movement of the pressure seat, the micro-generator is driven to generate electricity, and the electromagnet is energized. The electromagnet attracts the lifting frame to descend, and then locks and fixes 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, and the pressure seat stops moving at the same time. The electromagnet is instantly powered off, and the lifting frame automatically rises, thereby 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 and protecting the linear motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a structural schematic diagram of a linear motor thrust testing device proposed by the present invention.

[0016] Figure 2 This is a schematic diagram of the test assembly and the limiting mechanism proposed in the present invention.

[0017] Figure 3 for Figure 2 Schematic diagram from another angle.

[0018] Figure 4 This is a schematic structural diagram of the pressure seat proposed by the present invention.

[0019] Figure 5 This is a schematic structural diagram of the locking frame proposed by the present invention.

[0020] Figure 6 This is a schematic structural diagram of the limiting mechanism proposed in the present invention.

[0021] In the figure: 1. test bench; 2. frame; 3. force sensor; 4. test assembly; 41. slide bar; 42. pressure seat; 421. slider; 422. rack; 423. round sleeve; 424. slide groove; 43. buffer seat; 44. locking frame; 441. slide sleeve; 442. micro generator; 443. block; 444. slot; 445. electromagnet; 446. gear assembly; 45. slide rail; 46. connecting seat; 47. buffer spring; 48. guide rod; 49. cylindrical spring; 5. limit mechanism; 51. fixing frame; 52. locking column; 53. lifting frame; 54. lifting rod; 55. iron block; 56. compression spring; 57. spherical part; 58. locking sleeve. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0023] Embodiment: This embodiment discloses a linear motor thrust test device, such as Figure 1-Figure 6As shown, it includes: a test bench 1; a frame 2 is fixedly connected to the test bench 1, a test assembly 4 is connected to the frame 2, the test assembly 4 includes a connecting seat 46, a force sensor 3 is installed at one end of the connecting seat 46, the force sensor 3 is fixedly installed on the frame 2, and 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 the two sides of the slide bar 41, the slide rails 45 are fixedly connected to the connecting seat 46, a pressure seat 42 is slidably connected to the slide bar 41, and the pressure seat 42 At the same time, it is slidably connected to the slide rail 45; and the slide bar 41 is connected to a locking frame 44, which can be fixed on the slide bar 41 or slide on the slide bar 41; the slide bar 41 is fixedly connected to a limiting mechanism 5 that cooperates with the locking frame 44, and the limiting mechanism 5 is used to lock and fix the locking frame 44, and the slide rail 45 is fixedly connected to a guide rod 48, which is arranged parallel to the slide rail 45, and the guide rod 48 is slidably connected to the locking frame 44, and a cylindrical spring 49 is connected to the surface of the guide rod 48, and the cylindrical spring 49 is arranged between the pressure seat 42 and the locking frame 44. When the linear motor drives the pressure seat 42 to move toward the locking frame 44, the cylindrical spring 49 is compressed and the elastic force increases continuously. The working principle of the limit mechanism 5 is as follows: when the linear motor pushes the pressure seat 42 to move toward the locking frame 44, the limit mechanism 5 automatically locks and fixes the locking frame 44. As the pressure seat 42 approaches, the elastic force of the cylindrical spring 49 increases continuously. When the maximum thrust of the linear motor is balanced with the elastic force of the cylindrical spring 49, the pressure seat 42 stops moving. At this time, the force sensor 3 measures the maximum thrust of the linear motor. At the same time, the limit mechanism 5 automatically releases the locking frame 44 in an instant. The locking frame 44 switches from the locked state to the free state. The pressure 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 pressure 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 to the linear motor, avoiding the cylindrical spring 49 from bouncing the linear motor mover slide when the power is suddenly cut off.

[0024] like Figure 4 As shown, the pressure seat 42 is provided with a slider 421 slidably connected to the guide rod 48, and the side of the pressure seat 42 is provided with a slide groove 424 slidably connected to the slide rail 45, which ensures the stability of the pressure seat 42 when sliding. The center of the pressure seat 42 is provided with a circular sleeve 423 slidably connected to the slide rod 41; the pressure seat 42 is fixedly connected to a rack 422 that cooperates with the gear assembly 446. When the pressure seat 42 moves toward the locking frame 44, the rack 422 drives the gear assembly 446 to rotate.

[0025] like Figure 5As shown, a pair of blocks 443 are fixedly connected to the locking frame 44, and the blocks 443 are slidably connected to the guide rod 48, and a slot 444 is provided on the blocks 443; a micro generator 442 is installed on the locking frame 44, and a gear assembly 446 is connected to the input end of the micro generator 442. The gear assembly 446 increases the speed of the input end of the micro generator 442, so that when the pressure seat 42 moves slowly, the micro generator 442 is driven to generate current through the gear assembly 446, and when the pressure seat 42 moves The gear assembly 446 is driven to rotate by the rack 422; an electromagnet 445 is installed at one end of the locking frame 44, and the electromagnet 445 is connected to the micro generator 442 through an electric wire. When the micro generator 442 generates electricity, the electromagnet 445 is in a powered state; in this embodiment, when the pressure 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 a powered state. When the pressure seat 42 stops moving, the electromagnet 445 is in a powered-off state.

[0026] like Figure 6 As shown, the limiting mechanism 5 includes a fixing frame 51, on which a locking sleeve 58 is fixedly connected, and the locking sleeve 58 is fixedly connected to the sliding rod 41 by bolts, wherein the fixing frame 51 is strong enough to resist the maximum thrust of the linear motor, and the fixing frame 51 is movably connected with a locking column 52 engaged with the card slot 444, and the locking column 52 is provided with a pair of locking columns respectively connected to the two ends of the fixing frame 51, and the locking column 52 passes through the fixing frame 51, and the locking frame 44 is locked and fixed by inserting the locking column 52 into the card slot 444, and a lifting frame 53 is fixedly connected to the locking column 52, and a lifting rod 54 movably connected to the fixing frame 51 is fixedly connected to the lifting frame 53, and the lifting rod 54 passes through the fixing frame 51, and the lifting frame 53 is fixedly connected to the lifting frame 53. An iron block 55 cooperating with the electromagnet 445 is fixedly installed at the lower end of the descending rod 54, and 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 has pulling force when it is in a stretched state; when the pressure seat 42 moves, the electromagnet 445 is energized to attract the iron block 55, driving the lifting rod 54 to descend, thereby completely inserting the locking column 52 into the slot 444, thereby locking and fixing the locking frame 44; when the pressure seat 42 stops moving, the electromagnet 445 is powered off, the lifting frame 53 rises due to the elastic force of the compression spring 56, and the locking column 52 is separated from the slot 444, thereby releasing the locking frame 44, and the locking frame 44 is in a free state.

[0027] Preferably, a spherical portion 57 is provided at the lower end of the locking column 52. When the compression spring 56 is in a natural state, a portion of the spherical portion 57 is just inserted into the slot 444, thereby pre-locking the locking frame 44. The locking frame 44 is pre-locked by the spherical portion 57. When the pressure 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, thereby ensuring that the locking column 52 can be fully inserted into the slot 444; when the maximum thrust of the linear motor is tested, the pressure 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 slot 44 can be separated from the spherical portion 57 of the locking column 52, thereby allowing the locking frame 44 to move forward.

[0028] Preferably, a sliding sleeve 441 is fixedly connected to the locking frame 44, and 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, and a buffer spring 47 is connected between the buffer seat 43 and the connecting seat 46. When 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 acts as a buffer limit for 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 a natural state and the potential energy is completely released.

[0029] Working principle: This embodiment includes two methods of testing the maximum thrust of the linear motor: the first is a maximum static thrust test: before the test, the locking frame 44 is moved to the position of the buffer seat 43, the pressure seat 42 is directly in contact with the limiting mechanism 5, and the linear motor acts directly on the pressure seat 42. During the test, the pressure seat 42 and the limiting mechanism 5 are in a stationary state, and the thrust of the linear motor is gradually increased, and the maximum static thrust of the linear motor is measured by the force sensor 3; the second is a maximum dynamic thrust test: before the test, the limiting mechanism 5 and the locking frame 44 are pre-clamped together, that is, the spherical portion 57 of the locking column 52 is connected to the slot 444, and the linear motor drives the pressure seat 42 to move toward the locking frame 44. During the movement, the rack 422 drives the micro-generator 442 to generate electricity through the gear assembly 446, and the electromagnet 445 is energized. After the electromagnet 445 is energized, it attracts the lifting frame 53 to descend, and the locking frame 44 is completely locked and fixed by the locking column 52, thereby ensuring the stable position of the locking frame 44. , as the pressure seat 42 moves, the compression force of the cylindrical spring 49 continues to increase. When the elastic force of the cylindrical spring 49 is balanced with the maximum thrust of the linear motor, the pressure seat 42 stops moving. At this time, the force sensor 3 tests the maximum thrust of the linear motor. Since the pressure seat 42 stops moving, the micro generator 442 stops generating electricity, the electromagnet 445 is powered off, and the lifting frame 53 automatically rises and resets under the elastic force of the compression spring 56. The locking frame 44 is separated from the limit mechanism 5 by the larger elastic force of the cylindrical spring 49, and the locking frame 44 continues to move forward until it hits the buffer seat 43. At the same time, the pressure seat 42 continues to move forward under the thrust of the linear motor until it contacts the limit mechanism 5. Since the moving distance of the locking frame 44 is much greater than the moving distance of the pressure seat 42, the cylindrical spring 49 returns to its natural state at this time, and the potential energy is released. Then the linear motor is powered off, avoiding the problem that the cylindrical spring 49 directly powers off the linear motor mover slide and causes damage to the linear motor.

[0030] Finally, it should be noted that in the description of the present invention, it should be noted that the terms "vertical", "up", "down", "horizontal", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0031] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention is described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, 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: include: Testbench (1); The test bench (1) is fixedly connected to a frame (2), the frame (2) is connected to a test assembly (4), the test assembly (4) comprises a connection seat (46), and a force sensor (3) is installed at one end of the connection seat (46); 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), a pressure seat (42) is slidably connected to the slide bar (41), and a locking frame (44) is connected to the slide bar (41); The slide bar (41) is fixedly connected to a limit mechanism (5) that cooperates with the locking frame (44), and the slide rail (45) is fixedly connected to a guide rod (48), the guide rod (48) is slidably connected to the locking frame (44), and a cylindrical spring (49) is connected to the surface of the guide rod (48), and the cylindrical spring (49) is arranged between the locking frame (44) and the pressure seat (42); When the linear motor pushes the pressure seat (42) to move in the direction of the locking frame (44), the limiting mechanism (5) automatically locks and fixes the locking frame (44); when the pressure seat (42) stops moving, the limiting mechanism (5) automatically releases the locking frame (44).

2. A linear motor thrust test device according to claim 1, characterized in that: A pair of clamping blocks (443) are fixedly connected to the locking frame (44), the clamping blocks (443) are slidably connected to the guide rods (48), and clamping grooves (444) are provided on the upper surfaces of the clamping blocks (443).

3. A linear motor thrust test device according to claim 2, characterized in that: The limiting mechanism (5) comprises a fixed frame (51), the fixed frame (51) being fixedly connected to the sliding rod (41), a locking column (52) being movably connected to the fixed frame (51) and engaging with the locking groove (444), a lifting frame (53) being fixedly connected to the locking column (52), the lifting frame (53) being fixedly connected to a lifting rod (54) movably connected to the fixed frame (51), and a compression spring (56) being connected between the lifting frame (53) and the fixed frame (51).

4. A linear motor thrust test device according to claim 3, characterized in that: A micro generator (442) is mounted on the locking frame (44); an input end of the micro generator (442) is connected to a gear assembly (446); and a rack (422) matching the gear assembly (446) is fixedly connected to the pressure seat (42).

5. A linear motor thrust test device according to claim 4, characterized in that: An electromagnet (445) is mounted on the locking frame (44), and the electromagnet (445) is connected to the micro generator (442) via an electric wire. An iron block (55) matching the electromagnet (445) is fixedly mounted on the lower end of the lifting rod (54).

6. A linear motor thrust test device according to claim 5, 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).

7. A linear motor thrust test device according to claim 6, characterized in that: The lower end of the locking column (52) is provided with a spherical portion (57), and when the compression spring (56) is in a natural state, the spherical portion (57) is just inserted into the slot (444); the fixing frame (51) is fixedly connected with a locking sleeve (58), and the locking sleeve (58) is fixedly connected to the sliding rod (41).

8. A linear motor thrust test device according to claim 7, characterized in that: The pressure seat (42) is provided with a sliding block (421) slidably connected to the guide rod (48), and the side of the pressure seat (42) is provided with a sliding groove (424) slidably connected to the slide rail (45), and the center of the pressure seat (42) is provided with a circular sleeve (423) slidably connected to the slide rod (41).

Images