A power frequency signal generator for EMC testing

Abstract

The utility model discloses an industrial frequency signal generator for EMC testing, belonging to the field of industrial frequency signal generators. The industrial frequency signal generator for EMC testing comprises a signal generator body, a wire take-up box is installed on the signal generator body, a fixed shaft is installed on the wire take-up box, a rotating disk is sleeved on the fixed shaft, a driven round belt pulley is sleeved on the fixed shaft, a driving motor is fixedly installed on the mounting plate, a driving round belt pulley is fixedly installed on the driving motor, a transmission mechanism is arranged between the driven round belt pulley and the rotating disk, the industrial frequency signal generator for EMC testing drives the round belt transmission by setting a starting driving motor, thereby realizing automatic winding, the cooperation of an auxiliary arm and a fixed block can prevent the wire from being loosened or winding unevenly, and the relative sliding of the round belt and the round belt pulley when winding is completed can protect the signal line from damage and ensure the winding effect.

Description

Technical Field

[0001] The utility model relates to the technical field of power frequency signal generators, in particular to a power frequency signal generator for EMC testing. Background Art

[0002] EMC test, or electromagnetic compatibility test, is a comprehensive assessment of the interference size and anti-interference ability of electronic products in electromagnetic fields. The power frequency signal generator is an instrument specially used to generate stable and accurate power frequency AC signals. It uses AC power to generate alternating current and generates the required power frequency AC signal through the signal generating circuit. During EMC testing, a power frequency signal generator is needed to generate a specific electromagnetic field environment to simulate and test the electromagnetic compatibility performance of electronic products.

[0003] After investigation, the Chinese utility model patent with publication number CN218352951U discloses a pulse signal generator, including a pulse signal generator body, a fixing frame is arranged on both sides of the pulse signal generator body, a shock-absorbing pad is arranged on the outer wall of the fixing frame, and a connecting block is arranged at the four corners of the pulse signal generator body. The above-mentioned signal generator is used to limit and fix the pulse signal generator body by combining a limiting frame with a rubber pad, thereby avoiding the situation that the pulse signal generator body falls off due to the active connection between the pulse signal generator body and the fixing frame when the device is hit, thereby avoiding its damage. When the signal generator is used, many special cables are required, including output signal lines, input signal lines, etc., and these special wirings often need to be stored separately. When working outside or using it daily, there will be a situation where the special wiring is forgotten and cannot work. In addition, the outer diameter of such cables is relatively thick, the material is relatively hard, and it is very inconvenient to store them. It is also easy to get knotted between the lines. The above-mentioned signal generator does not provide a solution for the storage and arrangement of special wirings, and cannot cope with the use problems in practical applications.

[0004] Therefore, the utility model provides an industrial frequency signal generator for EMC testing to solve the above problems. Utility Model Content

[0005] 1. Technical issues to be resolved

[0006] The utility model provides an industrial frequency signal generator for EMC testing, aiming to solve the problems in the background technology that the existing dedicated wiring of the signal generator is inconvenient to store with the machine.

[0007] (II) Technical solution

[0008] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an industrial frequency signal generator for EMC testing, comprising a signal generator body, a take-up box is rotatably mounted on the signal generator body, a mounting plate is fixedly arranged in the take-up box, three turntable grooves are opened on the mounting plate, a fixed shaft is arranged in the turntable groove, one end of the fixed shaft is fixedly connected to the take-up box, a rotating disk adapted to the turntable groove is mounted on the fixed shaft, and a driven circular pulley is mounted on one end of the fixed shaft close to the take-up box;

[0009] A driving motor is fixedly mounted on the mounting plate, three driving circular pulleys are fixedly mounted on the output end of the driving motor, a circular belt is sleeved between the driving circular pulley and the driven circular pulley, a transmission mechanism is arranged between the driven circular pulley and the rotating disk, and a fixing buckle is fixedly mounted on one end of the rotating disk away from the driven circular pulley.

[0010] Preferably, the transmission mechanism includes a dial mounted on the fixed shaft, a dial tooth fixedly connected to the dial, and a movable rod slidably arranged on the fixed buckle and passing through the rotating disk, a limit plate is fixedly arranged on the movable rod, and a first spring is arranged between the limit plate and the rotating disk.

[0011] Preferably, three mounting rods are fixedly mounted on the mounting plate, auxiliary arms are mounted on the mounting rods, three fixed blocks corresponding to the auxiliary arms are fixedly mounted on the mounting plate, a second spring is arranged between the fixed block and the auxiliary arm, and the auxiliary arm is rotatably connected to the mounting rods.

[0012] Preferably, two installation shafts are symmetrically mounted on one end of the fixed shaft away from the driven circular pulley, and a baffle is rotatably mounted on the installation shaft.

[0013] Preferably, a return torsion spring is installed between the rotating disk and the fixed shaft.

[0014] Preferably, the fixing buckle is an elastic plastic buckle.

[0015] (III) Beneficial effects

[0016] The power frequency signal generator for EMC testing has a simple structure and is easy to use. By setting a starting drive motor to drive the round belt transmission, automatic winding is realized. The fixed buckle can stably fix the end of the signal line to ensure the smooth progress of the winding process. The cooperation between the movable rod and the dial can prevent the rotating disk from moving with the drive motor when the signal line is not installed. The cooperation between the auxiliary arm and the fixed block can press the wound wire when winding the signal line to prevent it from loosening or uneven winding. When the winding is completed, the relative sliding of the round belt and the pulley is coordinated to protect the signal line from damage and ensure the winding effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of an industrial frequency signal generator for EMC testing;

[0018] Figure 2 This is a schematic diagram of the structure of a take-up box of an industrial frequency signal generator for EMC testing;

[0019] Figure 3 A schematic diagram of the internal structure of a take-up box of an industrial frequency signal generator for EMC testing;

[0020] Figure 4 The present invention is a schematic diagram of the side cross-sectional structure of a take-up box of an industrial frequency signal generator for EMC testing.

[0021] In the figure: 1. signal generator body; 2. take-up box; 21. mounting plate; 211. turntable slot; 3. fixed shaft; 31. rotating disk; 311. fixing buckle; 312. reset torsion spring; 32. driven circular pulley; 33. circular belt; 4. driving motor; 41. driving circular pulley; 5. transmission mechanism; 51. dial; 511. shifting teeth; 52. movable rod; 53. first spring; 54. limit plate; 6. mounting rod; 61. auxiliary arm; 62. fixing block; 63. second spring; 7. mounting shaft; 71. baffle. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] The utility model provides an industrial frequency signal generator for EMC testing, such as Figure 1-4As shown, the industrial frequency signal generator includes a signal generator body 1, on which a take-up box 2 is rotatably mounted, a mounting plate 21 is fixedly arranged in the take-up box 2, three turntable grooves 211 are opened on the mounting plate 21, a fixed shaft 3 is arranged in the turntable groove 211, one end of the fixed shaft 3 is fixedly connected to the take-up box 2, a rotating disk 31 adapted to the turntable groove 211 is sleeved on the fixed shaft 3, and a driven circular pulley 32 is sleeved on one end of the fixed shaft 3 close to the take-up box 2; a driving motor 4 is fixedly mounted on the mounting plate 21, and three driving circular pulleys 41 are fixedly mounted on the output end of the driving motor 4, a circular belt 33 is sleeved between the driving circular pulley 41 and the driven circular pulley 32, a transmission mechanism 5 is arranged between the driven circular pulley 32 and the rotating disk 31, and a fixed buckle 311 is fixedly mounted on one end of the rotating disk 31 away from the driven circular pulley 32.

[0024] When in use, the wire take-up box 2 is rotated to open, and the dedicated wiring end is inserted into the fixed buckle 311 fixed on the rotating disk 31, and the driving motor 4 is started. The output end of the driving motor 4 drives the active circular pulley 41 to rotate, and then the rotation is transmitted to the driven circular pulley 32 through the circular belt 33. The driven circular pulley 32 rotates around the fixed axis 3, and the rotation is output to the rotating disk 31 through the transmission mechanism 5. The rotating disk 31 also rotates around the fixed axis 3 in the turntable groove 211. In the process of the fixed buckle 311 driving the signal line to rotate around the fixed axis 3, the signal line is gradually wound around the fixed axis 3 to complete the storage of the signal line.

[0025] Specifically, the transmission mechanism 5 includes a dial 51 mounted on the fixed shaft 3, a shifting tooth 511 fixedly connected to the dial 51, and a movable rod 52 slidably arranged on the fixed buckle 311 and passing through the rotating disk 31, a limit plate 54 is fixedly arranged on the movable rod 52, and a first spring 53 is arranged between the limit plate 54 and the rotating disk 31; when the end of the signal line is installed on the fixed buckle 311, the movable rod 52 will be pressed in the direction of the rotating disk 31 at the same time, and the end of the movable rod 52 in contact with the cable can be designed to be an arc-shaped structure matching the fixed buckle 311. After the movable rod 52 is pressed in, it further extends through one end of the rotating disk 31, cooperates with the shifting tooth 511 on the dial 51 fixed on the driven circular pulley 32, and can be driven to rotate by the dial 51. The first spring 53 arranged on the movable rod 52 will push the limit plate 54 when the signal line is not installed or removed, and push the movable rod 52 to the side away from the dial 51, thereby releasing the cooperation between the movable rod 52 and the dial 51. By setting the movable rod 52 and the dial 51, it can be achieved that when the signal line is not installed, the corresponding rotating disk 31 will not move with the driving motor 4, thereby improving the adaptability and safety of the device.

[0026] Furthermore, three mounting rods 6 are fixedly mounted on the mounting plate 21, and an auxiliary arm 61 is sleeved on the mounting rod 6. Three fixing blocks 62 corresponding to the auxiliary arms 61 are fixedly mounted on the mounting plate 21, and a second spring 63 is provided between the fixing block 62 and the auxiliary arm 61. After the end of the signal line is inserted into the fixing buckle 311, the signal line can be placed between the auxiliary arm 61 and the fixed shaft 3, and the auxiliary arm 61 can rotate around the mounting rod 6. The positions of the mounting rod 6 and the fixing block 62 are matched with the rotating disk 31. Under the cooperation of the second spring 63 and the fixing block 62, the auxiliary arm 61 starts The pressure in the direction of the fixed axis 3 is always maintained. When the signal line is wound up, the wound wire can be pressed to prevent it from loosening. The signal line generally used has installation ends at both ends, or one end is the installation end and the other end is a metal clip. Both ends are larger than the signal line body. For this structure, when the winding is completed, the free end will be clamped by the auxiliary arm 61. The resistance generated at this time will drive the round belt 33 and the active round pulley 41 or the driven round pulley 32 to slide relative to each other, which can not only protect the signal line from being damaged, but also clamp and limit the free end of the signal line through the auxiliary arm 61, so as to achieve the best winding effect.

[0027] Furthermore, two mounting shafts 7 are symmetrically mounted at one end of the fixed shaft 3 away from the driven circular pulley 32, and a baffle 71 is rotatably mounted on the mounting shaft 7, and a return torsion spring 312 is installed between the rotating disk 31 and the fixed shaft 3; the baffle 71 and the mounting shaft 7 can rotate under the action of external force, and after the winding is completed, the baffle 71 plays a limiting role for the wound signal line. When taking out the wound signal line, it is only necessary to move one roll of it outward as a whole to take it out. At this time, under the action of manpower, the baffle 71 rotates around the mounting shaft 7 to release the limit on the line roll. After the taking out is completed, the baffle 71 can rotate around the mounting shaft 7 to restore the limited state. At the same time of taking out, the movable rod 52 is released, and the cooperation between the movable rod 52 and the dial 51 is released. The rotating disk 31 returns to its initial position under the action of the return torsion spring 312, which is convenient for use during the next winding.

[0028] It should be noted that the fixing buckle 311 is an elastic plastic buckle.

[0029] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An industrial frequency signal generator for EMC testing, comprising a signal generator body (1), characterized in that: A wire take-up box (2) is rotatably mounted on the signal generator body (1), a mounting plate (21) is fixedly mounted inside the wire take-up box (2), three turntable slots (211) are opened on the mounting plate (21), a fixed shaft (3) is arranged inside the turntable slot (211), one end of the fixed shaft (3) is fixedly connected to the inside of the wire take-up box (2), a rotating disk (31) matched with the turntable slot (211) is mounted on the fixed shaft (3), and a driven circular pulley (32) is mounted on one end of the fixed shaft (3) close to the wire take-up box (2); A driving motor (4) is fixedly mounted on the mounting plate (21); three driving circular pulleys (41) are fixedly mounted on the output end of the driving motor (4); a circular belt (33) is sleeved between the driving circular pulley (41) and the driven circular pulley (32); a transmission mechanism (5) is arranged between the driven circular pulley (32) and the rotating disk (31); and a fixing buckle (311) is fixedly mounted on one end of the rotating disk (31) away from the driven circular pulley (32).

2. The power frequency signal generator for EMC testing according to claim 1, characterized in that: The transmission mechanism (5) comprises a dial (51) sleeved on the fixed shaft (3), a shifting tooth (511) fixedly connected to the dial (51), and a movable rod (52) slidably arranged on the fixed buckle (311) and passing through the rotating disk (31), a limit plate (54) being fixedly arranged on the movable rod (52), and a first spring (53) being arranged between the limit plate (54) and the rotating disk (31).

3. The power frequency signal generator for EMC testing according to claim 2, characterized in that: Three mounting rods (6) are fixedly mounted on the mounting plate (21), an auxiliary arm (61) is sleeved on the mounting rod (6), three fixing blocks (62) corresponding to the auxiliary arms (61) are fixedly mounted on the mounting plate (21), and a second spring (63) is arranged between the fixing block (62) and the auxiliary arm (61).

4. The power frequency signal generator for EMC testing according to claim 3, characterized in that: Two installation shafts (7) are symmetrically mounted on one end of the fixed shaft (3) away from the driven circular pulley (32), and a baffle (71) is rotatably mounted on the installation shaft (7).

5. The power frequency signal generator for EMC testing according to claim 1, characterized in that: A return torsion spring (312) is installed between the rotating disk (31) and the fixed shaft (3).

6. The power frequency signal generator for EMC testing according to claim 1, characterized in that: The fixing buckle (311) is an elastic plastic buckle.

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