State monitoring device for low-voltage contactor
By introducing a self-locking design of telescopic handle, screw, moving block, toothed plate and gear into the low-voltage contactor condition monitoring device, as well as a combination of telescopic frame and ball bearings, the problem of frictional rotation of the knob in the clamp meter in a narrow space is solved, achieving a highly stable monitoring effect and reducing wear.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-14
- Publication Date
- 2026-03-17
AI Technical Summary
When existing clamp meters monitor the status of low-voltage contactors in confined spaces, the knobs tend to rub against the distribution box and rotate, requiring multiple turns and affecting the monitoring results.
A low-voltage contactor condition monitoring device was designed, comprising a clamp meter and a telescopic frame. By setting a combination of telescopic handle, screw, moving block, toothed plate and gear, a self-locking function is achieved to prevent the knob from turning in a narrow space. The telescopic frame and ball bearings reduce friction and ensure stability.
This effectively avoids frictional rotation of the knob in confined spaces, improves monitoring stability, avoids the problem of repeated monitoring, and reduces wear on the clamp meter housing caused by the telescopic frame.
Smart Images
Figure CN224005221U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of low-voltage contactor monitoring technology, and in particular relates to a low-voltage contactor status monitoring device. Background Technology
[0002] Contactors are electrical appliances used to frequently connect and disconnect AC / DC main circuits and high-capacity control circuits over long distances. Their main control object is the electric motor, but they can also control other electrical loads, such as electric heaters, lighting fixtures, welding machines, and capacitor banks.
[0003] When monitoring the condition of low-voltage contactors, clamp meters are typically used. In actual operation, workers may encounter special working environments, such as narrow spaces in distribution boxes. Existing clamp meters require turning the knob in advance during monitoring, but the knob lacks a limiting mechanism, resulting in inconsistent stability. This causes the knob to easily rub against the distribution box when inserted into a narrow space, requiring multiple turns and affecting the monitoring effect. To solve the above problems, a low-voltage contactor condition monitoring device is proposed. Utility Model Content
[0004] The purpose of this utility model is to provide a low-voltage contactor status monitoring device to solve the problem that in actual work, workers may encounter some special working environments, such as narrow space in the distribution box. Existing clamp meters require turning the knob in advance during the monitoring process, but the knob of the existing clamp meter does not have a limiting mechanism, and the stability is inconsistent. As a result, when the knob is inserted into the narrow space of the distribution box, it is easy for the knob to rub against the distribution box and rotate, requiring multiple turning of the knob, which affects the monitoring effect.
[0005] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:
[0006] This utility model relates to a low-voltage contactor status monitoring device, comprising a clamp meter and a telescopic frame. The clamp meter includes a first clamp, a second clamp, a knob, a display screen, and several buttons. An internal mounting groove is provided within the clamp meter, and a rotating shaft and a mounting base are connected within the mounting groove. The mounting base is fixedly connected to the mounting groove. A gear is fixedly connected to the circumferential side of the rotating shaft, and the upper end of the rotating shaft is fixedly connected to the knob. A screw is installed within the mounting base, and a moving block is installed on the circumferential side of the screw. A limit block is fixedly connected to one surface of the moving block, and a toothed plate is fixedly connected to one surface of the limit block. A handle is fixedly connected to one end of the screw, and a telescopic handle is connected to the circumferential side of the handle. Several strip grooves are provided on the circumferential side of the telescopic handle, and springs are fixedly connected within the strip grooves. A connecting plate is fixedly connected to one end of the springs, and the connecting plate is fixedly connected to the handle. A shielding shell is fixedly connected to one side of the clamp meter, and the shielding shell is installed on the circumferential side of the telescopic handle.
[0007] Preferably, one side of the telescopic frame is provided with several sliding grooves, a sliding rod is installed in the sliding groove, one end of the sliding rod is fixedly connected to a clamp meter, a nut is installed on the peripheral side of the sliding rod, a handle is fixedly connected to one surface of the telescopic frame, and several slots are provided on the peripheral side of the clamp meter, with ball bearings tumbling in the slots.
[0008] Preferably, the telescopic handle is slidably connected to the throttle, and both the throttle and the screw are rotatably connected to the mounting base.
[0009] Preferably, the moving block is threadedly engaged with the screw, and the toothed plate meshes with the gear.
[0010] Preferably, the rotating shaft and the knob are rotatably connected to the clamp meter, and the connecting plate is slidably engaged with the strip groove.
[0011] Preferably, a limiting groove is provided on one side of the mounting base, and the limiting block slides in conjunction with the limiting groove.
[0012] Preferably, the slide rod is slidably engaged with the slide groove, the slide rod is threadedly engaged with the nut, and the telescopic frame is frictionally engaged with the ball bearing.
[0013] This utility model has the following beneficial effects:
[0014] 1. This utility model, by setting up a telescopic handle, a screw, a moving block, a toothed plate, and a gear, allows the telescopic handle to be pulled out of the cover when the knob is turned. Rotating the telescopic handle drives the screw to rotate, and the moving block further drives the toothed plate to move through the limit block. The toothed plate meshes with the gear, causing the gear to drive the rotating shaft to rotate, which in turn drives the knob to rotate. The telescopic handle returns to its original position under the spring force and retracts back into the cover. This prevents the telescopic handle from rotating due to friction when the clamp meter is inserted into a narrow distribution box, thus avoiding the screw from rotating. There is a self-locking function between the screw and the moving block, so the knob will not rotate even when the clamp meter is inserted into a narrow distribution box. This design provides high stability and avoids the problem of affecting the monitoring results and requiring multiple monitoring sessions.
[0015] 2. This utility model incorporates a telescopic frame and ball bearings. Pulling the telescopic frame extends it outwards, stretching the clamp meter to a certain length. Then, tightening the nut secures the position of the telescopic frame. During the sliding process, the ball bearings roll within the slots, significantly reducing friction between the telescopic frame and the clamp meter. This prevents wear on the clamp meter's casing caused by the telescopic frame during extension and retraction. The extended telescopic frame effectively solves the problem of inconvenient measurement of components located far from the distribution box entrance.
[0016] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description
[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0018] Figure 1 This is a three-dimensional structural diagram of the present invention;
[0019] Figure 2 This is a top view of the structure of this utility model;
[0020] Figure 3 This is a cross-sectional structural diagram of the present invention;
[0021] Figure 4 for Figure 3 A magnified schematic diagram of the structure at point A in the middle.
[0022] The components represented by each number in the attached diagram are listed below: 1. Clamp gauge; 2. Telescopic frame; 3. Knob; 4. Display screen; 5. Cover; 6. Slide groove; 7. Slide rod; 8. Nut; 9. Handle; 10. Slot; 11. Ball bearing; 12. Mounting slot; 13. Shaft; 14. Gear; 15. Mounting base; 16. Screw; 17. Moving block; 18. Limiting block; 19. Toothed plate; 20. Turning handle; 21. Telescopic handle; 22. Strip groove; 23. Spring; 24. Connecting plate. Detailed Implementation
[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.
[0024] In the description of this utility model, it should be understood that the terms "upper", "middle", "outer", "inner", etc., which indicate orientation or positional relationship, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.
[0025] Please see Figures 1-4As shown, this utility model is a low-voltage contactor status monitoring device, including a clamp meter 1 and a telescopic frame 2. The clamp meter 1 includes a first clamp, a second clamp, a knob 3, a display screen 4, and several buttons. A mounting groove 12 is provided inside the clamp meter 1. A rotating shaft 13 and a mounting base 15 are connected within the mounting groove 12. The mounting base 15 is fixedly connected to the mounting groove 12. A gear 14 is fixedly connected to the circumferential side of the rotating shaft 13. The upper end of the rotating shaft 13 is fixedly connected to the knob 3. A screw 16 is installed inside the mounting base 15, and a screw 16 is mounted on the circumferential side of the screw 16. A movable block 17 is mounted, with a limit block 18 fixedly connected to one surface of the movable block 17. A toothed plate 19 is fixedly connected to one surface of the limit block 18. A throttle 20 is fixedly connected to one end of the screw 16. A telescopic handle 21 is connected to the circumferential side of the throttle 20. Several slots 22 are formed on the circumferential side of the telescopic handle 21. A spring 23 is fixedly connected to the slot 22. A connecting plate 24 is fixedly connected to one end of the spring 23. The connecting plate 24 is fixedly connected to the throttle 20. A shielding shell 5 is fixedly connected to one side of the clamp meter 1. The shielding shell 5 is installed... On the circumferential side of the telescopic handle 21, by setting the telescopic handle 21, screw 16, moving block 17, toothed plate 19 and gear 14, when the knob 3 is turned, the telescopic handle 21 is pulled out of the cover shell 5. Since the cover shell 5 is small, the telescopic handle 21 can be pulled out with an Allen wrench. At this time, the connecting plate 24 compresses the spring 23. After the telescopic handle 21 is pulled out, rotating the telescopic handle 21 causes the telescopic handle 21 to drive the screw 16 to rotate. The moving block 17 drives the limit block 18 to move, and the limit block 18 further drives... The moving toothed plate 19 moves, and through the meshing between the toothed plate 19 and the gear 14, the gear 14 drives the rotating shaft 13 to rotate. The rotating shaft 13 further drives the knob 3 to rotate. After the knob 3 has rotated, the telescopic handle 21 is released. The telescopic handle 21 is reset under the elastic force of the spring 23 and retracts into the cover shell 5. There is a self-locking function between the screw 16 and the moving block 17. Even if the clamp meter 1 is inserted into the narrow distribution box, the knob 3 will not rotate. It has high stability and avoids the problem of affecting the monitoring results and requiring multiple monitoring.
[0026] The telescopic frame 2 has several grooves 6 on one side, and a sliding rod 7 is installed in the groove 6. One end of the sliding rod 7 is fixedly connected to the clamp meter 1. A nut 8 is installed on the periphery of the sliding rod 7. A handle 9 is fixedly connected to one surface of the telescopic frame 2. Several slots 10 are opened on the periphery of the clamp meter 1. A ball bearing 11 is rolled in the slot 10. By setting the telescopic frame 2 and the ball bearing 11, the telescopic frame 2 is pulled and extended outward, stretching the clamp meter 1 to a certain length. Then, the nut 8 is tightened to fix the position of the telescopic frame 2. During the sliding process of the telescopic frame 2, the ball bearing 11 rolls in the slot 10, which can greatly reduce the friction between the telescopic frame 2 and the clamp meter 1 and avoid wear on the outer shell of the clamp meter 1 during the extension and retraction of the telescopic frame 2. The extended telescopic frame 2 can effectively solve the problem that the measured component is located far from the door of the distribution box and is inconvenient to measure.
[0027] The telescopic handle 21 is slidably connected to the throttle 20, and both the throttle 20 and the screw 16 are rotatably connected to the mounting base 15.
[0028] The movable block 17 is threadedly engaged with the screw 16, and the toothed plate 19 meshes with the gear 14.
[0029] Both the rotating shaft 13 and the knob 3 are rotatably connected to the clamp meter 1, and the connecting plate 24 is slidably engaged with the strip groove 22.
[0030] A limiting groove is provided on one side of the mounting base 15, and the limiting block 18 slides in the limiting groove.
[0031] The slide rod 7 slides with the slide groove 6, the slide rod 7 is threaded with the nut 8, and the telescopic frame 2 is frictionally engaged with the ball 11.
[0032] Example:
[0033] like Figures 1-4As shown, the method of using a low-voltage contactor status monitoring device of this utility model is as follows: When using this utility model, when the low-voltage contactor to be monitored is far from the opening of the distribution box, pull the telescopic frame 2. The telescopic frame 2 extends outward, stretching the clamp meter 1 to a certain length. Then tighten the nut 8 to fix the position of the telescopic frame 2. During the sliding process of the telescopic frame 2, the ball bearing 11 rolls in the slot 10, which can greatly reduce the friction between the telescopic frame 2 and the clamp meter 1, and avoid the wear of the outer shell of the clamp meter 1 caused by the telescopic frame 2 during the extension and retraction process. The extended telescopic frame 2 can effectively solve the problem that it is inconvenient to measure the component being measured when it is far from the door of the distribution box. When turning the knob 3, pull the telescopic handle 21 to pull the telescopic handle 21 out of the shielding shell 5. Since the shielding shell 5 is small, it can be pulled out with an Allen wrench. Pull out the telescopic handle 21. At this time, the connecting plate 24 compresses the spring 23. After the telescopic handle 21 is pulled out, rotate the telescopic handle 21, causing the screw 16 to rotate. The moving block 17 drives the limit block 18 to move. The limit block 18 further drives the toothed plate 19 to move. The toothed plate 19 meshes with the gear 14, causing the gear 14 to drive the rotating shaft 13 to rotate. The rotating shaft 13 further drives the knob 3 to rotate. After the knob 3 has rotated, release the telescopic handle 21. The telescopic handle 21 returns to its original position under the elastic force of the spring 23 and retracts into the cover shell 5. There is a self-locking function between the screw 16 and the moving block 17. Even if the clamp meter 1 is inserted into the narrow distribution box, the knob 3 will not rotate. The stability is high, avoiding the problem of affecting the monitoring results and requiring multiple monitoring. It should be noted that the clamp meter 1 should be adjusted to the DC current measurement mode. Clamp the clamp meter 1's clamps onto the contactor's wire, ensuring that both sides of the clamps are clamped tightly. Start the contactor; clamp meter 1 should display a stable current value. If the clamp meter shows a current value of 0, it indicates that the contactor is leaking current. Turn off the contactor; the clamp meter current value should immediately drop to 0. If the clamp meter shows a current value that is not 0, it indicates that the contactor has residual current and needs to be replaced.
[0034] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.
[0035] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.
Claims
1. A low voltage contactor condition monitoring device comprising a clamp meter (1) and a telescopic stand (2), characterized in that, The pincer-shaped watch (1) comprises a first pincer, a second pincer, a knob (3), a display screen (4) and a plurality of buttons, an installation groove (12) is arranged in the pincer-shaped watch (1), a rotating shaft (13) and a mounting seat (15) are connected in the installation groove (12), the mounting seat (15) is fixedly connected with the installation groove (12), a gear (14) is fixedly connected with the circumferential surface of the rotating shaft (13), the upper end of the rotating shaft (13) is fixedly connected with the knob (3), a screw rod (16) is arranged in the mounting seat (15), a moving block (17) is arranged on the circumferential surface of the screw rod (16), a limiting block (18) is fixedly connected with one surface of the moving block (17), a toothed plate (19) is fixedly connected with one surface of the limiting block (18), a rotating handle (20) is fixedly connected with one end of the screw rod (16), a telescopic handle (21) is connected with the circumferential surface of the rotating handle (20), a plurality of strip-shaped grooves (22) are arranged on the circumferential surface of the telescopic handle (21), springs (23) are fixedly connected in the strip-shaped grooves (22), connecting plates (24) are fixedly connected with one end of the springs (23), the connecting plates (24) are fixedly connected with the rotating handle (20), a shielding shell (5) is fixedly connected with one side surface of the pincer-shaped watch (1), and the shielding shell (5) is arranged on the circumferential surface of the telescopic handle (21).
2. A low voltage contactor condition monitoring device according to claim 1, characterised in that, A plurality of sliding grooves (6) are arranged on one side surface of the telescopic frame (2), sliding rods (7) are arranged in the sliding grooves (6), one end of each sliding rod (7) is fixedly connected with the pincer-shaped watch (1), screw nuts (8) are arranged on the circumferential surface of each sliding rod (7), a handle (9) is fixedly connected with one surface of the telescopic frame (2), a plurality of slot holes (10) are arranged on the circumferential surface of the pincer-shaped watch (1), and rolling balls (11) are rollingly connected in the slot holes (10).
3. The low voltage contactor condition monitoring device of claim 1, wherein, The telescopic handle (21) is slidingly connected with the rotating handle (20), and the rotating handle (20) and the screw rod (16) are both rotationally connected with the mounting seat (15).
4. The low voltage contactor condition monitoring device of claim 1, wherein, The moving block (17) is threadedly connected with the screw rod (16), and the toothed plate (19) is engaged with the gear (14).
5. The low voltage contactor condition monitoring device of claim 1, wherein, The rotating shaft (13) and the knob (3) are both rotationally connected with the pincer-shaped watch (1), and the connecting plates (24) are slidingly connected with the strip-shaped grooves (22).
6. The low voltage contactor condition monitoring device of claim 1, wherein, One side surface of the mounting seat (15) is provided with a limiting groove, and the limiting block (18) is slidingly connected with the limiting groove.
7. A low voltage contactor condition monitoring device according to claim 2, wherein, The sliding rod (7) is slidingly connected with the sliding groove (6), the sliding rod (7) is threadedly connected with the screw nut (8), and the telescopic frame (2) is frictionally connected with the rolling ball (11).