Portable residual current monitor

Abstract

The utility model relates to the technical field of current monitors, in particular to a portable residual current monitor, which comprises a protection box, a monitor body, a mounting seat, a mounting port, a mounting plate and a positioning mechanism, and is characterized in that the protection box comprises a box body and a box cover, the box cover is hinged on the box body, the monitor body is fixedly arranged in the box body, and the positioning mechanism is arranged on the mounting seat. The mounting seat is fixedly arranged on the box body, a mounting opening is formed in the mounting seat, the mounting plate is fixedly arranged on the box cover, a mounting block is fixedly arranged on the mounting plate, and the positioning mechanism is arranged in the mounting seat. The monitor body can be protected through the box body and the box cover, and meanwhile, the box body and the box cover cannot be loosened when the hand wheel rotates due to external force through the arrangement of the limiting mechanism, so that the problem that the fixing stability between the shell and the cover plate is relatively low in the related technology is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of current monitors, in particular to a portable residual current monitor. Background Art

[0002] The residual current monitor is a highly sensitive, portable, multi-range rectifier instrument with protective circuits. It features a wide measurement range of twenty ranges, capable of measuring both AC and DC stray voltages and currents. It requires no power supply and is safe and reliable. It is suitable for measuring the current and voltage generated by rails, water pipes, and cables in underground coal mines, preventing premature detonation of detonators and other explosion accidents caused by residual current discharge, thereby minimizing fire sources within the mine.

[0003] The residual current monitor in the prior art is generally fixed in a protective box, which facilitates the carrying of the current tester. For example, the utility model patent with authorization announcement number CN217766592U discloses a portable stray current monitor, which belongs to the field of power monitoring equipment, including a shell, an adjustable cover is provided on the upper end face of the shell, a plurality of terminal posts are provided at the tail position of the upper end face of the shell, a display screen is provided on the right side of the upper end face of the shell, an upper curved rod is provided in the middle position of the front end face of the cover, a lower curved rod is provided on the front end face of the shell corresponding to the position of the upper curved rod, an engaging block is provided in the middle position of the lower end face of the upper curved rod, and an engaging groove is provided on the upper end face of the lower curved rod corresponding to the engaging block.

[0004] The above patent can improve the convenience of connecting the shell and the cover through a snap-on mechanism, but the above patent is relatively simple, and the connection strength between the components for the shell and the cover is relatively insufficient, which can easily lead to the cover accidentally opening when the shell is impacted, thereby causing damage to the current monitor in the shell, thereby affecting the overall stability and service life of the device. Utility Model Content

[0005] The utility model provides a portable residual current monitor, which solves the problem of low fixing stability between a shell and a cover plate in the related art.

[0006] The technical solution of the utility model is as follows: A portable residual current monitor comprises a protection box, a monitor body, a mounting seat, a mounting port, a mounting plate and a positioning mechanism;

[0007] The protective box includes a box body and a box cover, and the box cover is hingedly arranged on the box body;

[0008] The monitoring instrument body is fixedly arranged in the box;

[0009] The mounting seat is fixedly arranged on the box body;

[0010] The mounting seat is provided with a mounting opening;

[0011] The mounting plate is fixedly arranged on the box cover, and a mounting block is fixedly arranged on the mounting plate;

[0012] The positioning mechanism is arranged in the mounting seat and is used for positioning between the mounting opening and the mounting block.

[0013] Preferably, the positioning mechanism includes:

[0014] Positioning grooves, the positioning grooves being provided on two side walls opposite to the mounting opening;

[0015] a positioning block, the positioning block being slidably disposed in the positioning groove;

[0016] Positioning slots, the positioning slots being provided on two opposite side walls of the mounting block;

[0017] A relative movement mechanism is provided in the mounting seat and is used to control the relative movement of the two positioning blocks.

[0018] Furthermore, the relative movement mechanism includes:

[0019] A first cavity is formed on one side of the positioning groove, and the first cavity is communicated with the positioning groove;

[0020] An adjusting block, two of which are slidably arranged in the first cavity;

[0021] an adjusting rod, the adjusting rod being hingedly arranged between the positioning block and the adjusting block;

[0022] A relative movement component is provided in the first cavity and is used for controlling the relative movement of the two adjustment blocks in the same first cavity.

[0023] Furthermore, the relative movement component includes:

[0024] A threaded hole is provided on the adjusting block;

[0025] a bidirectional threaded rod, the bidirectional threaded rod being rotatably disposed in the first cavity and passing through the two threaded holes via threaded engagement;

[0026] A rotating mechanism is provided in the mounting seat and is used to control the two bidirectional threaded rods to rotate synchronously.

[0027] Furthermore, the rotating mechanism includes:

[0028] a second cavity, the second cavity being opened on one side of the two first cavities;

[0029] a first gear, two of which are rotatably disposed in the second cavity, and the first gears are fixedly connected to the bidirectional threaded rod;

[0030] a second gear, the second gear being rotatably disposed in the second cavity, and a third gear being rotatably disposed between the second gear and the first gear;

[0031] Wherein, the third gear is meshed with the first gear and the second gear;

[0032] A driving mechanism is provided on the mounting seat and is used to control the second gear to rotate.

[0033] On the basis of the above solution, the driving mechanism includes:

[0034] A driving groove, the driving groove being provided on the mounting seat;

[0035] a driving port, the driving port being provided on the second gear and aligned with the driving groove;

[0036] A driving rod, the driving rod being disposed in the driving groove, the driving rod passing through the driving opening, and a hand wheel being fixedly disposed on the driving rod;

[0037] A limiting mechanism is provided on the driving rod and is used to limit the position between the driving port and the driving rod.

[0038] On the basis of the above solution, the limiting mechanism includes:

[0039] Limiting grooves, a plurality of said limiting grooves are opened on the side wall of the said driving port, and said limiting grooves penetrate the side wall of the second gear away from the side of the hand wheel;

[0040] Limit blocks, a plurality of which are fixedly provided on the side wall of the driving rod, and the shape of the limit blocks matches that of the limit grooves;

[0041] A supporting mechanism is provided in the mounting seat and is used for supporting the driving rod.

[0042] On the basis of the above solution, the support mechanism includes:

[0043] an annular groove, the annular groove being formed on a side wall of the driving groove;

[0044] a support plate, the support plate being slidably disposed in the annular groove;

[0045] Wherein, the driving rod is rotatably connected to the support plate;

[0046] A support spring is sleeved on the driving rod, and two ends of the support spring are in contact with the support plate and the side wall of the annular groove respectively.

[0047] Based on the above solution, a heat dissipation opening is provided on the side wall of the box.

[0048] Based on the above solution, a filter is provided in the heat dissipation port.

[0049] The working principle and beneficial effects of the utility model are as follows:

[0050] 1. In this utility model, the protective box can protect the monitor body and improve the portability of the monitor body.

[0051] 2. In the present invention, by setting the positioning mechanism, during the process of closing the box cover, the mounting block can be extended into the mounting opening, and then the operator rotates the hand wheel, thereby driving the second gear to rotate through the cooperation of the limit block and the limit groove, and at the same time, the transmission of the third gear can drive the first gear and the bidirectional threaded rod to rotate synchronously, and then the two adjusting blocks can be driven to move relative to each other through the thread cooperation of the adjusting block and the bidirectional threaded rod, so that the positioning block can be driven by the adjusting rod to extend into the positioning slot, and at the same time, the positioning block cooperates with the positioning slot and the positioning slot respectively to achieve the positioning between the mounting block and the mounting base, thereby improving the protection and portability of the monitor;

[0052] 3. In the present invention, the limiting mechanism allows the operator to release the handwheel after positioning the mounting block. This allows the drive rod to move under the action of the support spring, thereby releasing the limiting block from the limiting groove. Consequently, when the handwheel is rotated by external force, only the drive rod can be driven to rotate, and the third gear cannot be driven to rotate, thereby improving installation stability.

[0053] 4. In the present invention, through the arrangement of the protective box, the monitor body, the mounting seat, the mounting port, the mounting plate and the positioning mechanism, the positioning between the mounting seat and the mounting block can be achieved through the operation of the positioning mechanism, and then the protection of the monitor body can be achieved through the box body and the box cover. At the same time, through the arrangement of the limiting mechanism, when the handwheel rotates due to external force, the box body and the box cover will not loosen, thereby solving the problem of low fixing stability between the shell and the cover in the related art. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] The present invention will be further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0055] Figure 1 This is a schematic diagram of the structure of the utility model;

[0056] Figure 2 This is a structural diagram of the utility model's protective box in a closed state;

[0057] Figure 3 This is a schematic diagram of the cross-sectional structure of the mounting seat of the utility model;

[0058] Figure 4 This is a schematic diagram of the positioning mechanism structure of the utility model;

[0059] Figure 5 This is a structural diagram of the support plate of the utility model.

[0060] In the figure: 1. Box body; 2. Box cover; 3. Monitor body; 4. Mounting base; 5. Mounting port; 6. Mounting plate; 7. Mounting block; 8. Positioning block; 9. Positioning slot; 10. Adjustment block; 11. Adjustment rod; 12. Bidirectional threaded rod; 13. First gear; 14. Second gear; 15. Third gear; 16. Drive rod; 17. Limiting slot; 18. Limiting block; 19. Support plate; 20. Support spring; 21. Heat dissipation vent. DETAILED DESCRIPTION

[0061] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0062] like Figure 1-Figure 5 As shown, this embodiment proposes a portable residual current monitor, including a protective box, a monitor body 3, a mounting seat 4, a mounting port 5, a mounting plate 6 and a positioning mechanism. The protective box includes a box body 1 and a box cover 2. The box cover 2 is hingedly set on the box body 1, the monitor body 3 is fixedly set in the box body 1, the mounting seat 4 is fixedly set on the box body 1, a mounting port 5 is opened on the mounting seat 4, the mounting plate 6 is fixedly set on the box cover 2, and a mounting block 7 is fixedly set on the mounting plate 6. The positioning mechanism is set in the mounting seat 4 for positioning between the mounting port 5 and the mounting block 7. A heat dissipation port 21 is opened on the side wall of the box body 1, and a filter is set in the heat dissipation port 21.

[0063] Reference Figure 1-Figure 4The positioning mechanism includes a positioning groove, a positioning block 8, a positioning through groove 9 and a relative movement mechanism. The positioning groove is opened on the two opposite side walls of the mounting port 5, the positioning block 8 is slidably arranged in the positioning groove, the positioning through groove 9 is opened on the two opposite side walls of the mounting block 7, and the relative movement mechanism is arranged in the mounting seat 4, for controlling the two positioning blocks 8 to move relative to each other. The relative movement mechanism includes a first cavity, an adjustment block 10, an adjustment rod 11 and a relative movement component. A first cavity is opened on one side of the positioning groove, and the first cavity is connected to the positioning groove. Two adjustment blocks 10 are slidably arranged in the first cavity. The adjustment rod 11 is hingedly set between the positioning block 8 and the adjustment block 10. The relative movement component is arranged in the first cavity, for controlling the two adjustment blocks 10 in the same first cavity to move relative to each other.

[0064] Specifically, in the process of closing the box cover 2, the mounting block 7 can be extended into the mounting opening 5, and the two adjustment blocks 10 can be controlled to move relative to each other through the operation of the relative movement component. In the process of the movement of the adjustment block 10, the positioning block 8 can be driven to move by the adjustment rod 11, so that the positioning block 8 is extended into the positioning slot 9. At the same time, the positioning block 8 cooperates with the positioning slot and the positioning slot 9 respectively to realize the positioning between the mounting block 7 and the mounting seat 4, thereby improving the protection and portability of the monitor.

[0065] Reference Figure 1-Figure 4 The relative movement component includes a threaded hole, a bidirectional threaded rod 12 and a rotation mechanism. A threaded hole is opened on the adjustment block 10. The bidirectional threaded rod 12 is rotatably arranged in the first cavity. The bidirectional threaded rod 12 passes through the two threaded holes through threaded cooperation. The rotation mechanism is arranged in the mounting seat 4 for controlling the two bidirectional threaded rods 12 to rotate synchronously. The rotation mechanism includes a second cavity, a first gear 13, a second gear 14 and a driving mechanism. The second cavity is opened on one side of the two first cavities. Two first gears 13 are rotatably arranged in the second cavity. The first gear 13 is fixedly connected to the bidirectional threaded rod 12. The second gear 14 is rotatably arranged in the second cavity. A third gear 15 is rotatably arranged between the second gear 14 and the first gear 13, wherein the third gear 15 is meshed with the first gear 13 and the second gear 14. A driving mechanism is arranged on the mounting seat 4 for controlling the rotation of the second gear 14. The driving mechanism includes a driving groove, a driving port, a driving rod 16 and a limiting mechanism. The driving groove is opened on the mounting seat 4, the driving port is opened on the second gear 14, the driving port is aligned with the driving groove, the driving rod 16 is arranged in the driving groove, the driving rod 16 passes through the driving port, a handwheel is fixed on the driving rod 16, and a limiting mechanism is arranged on the driving rod 16 for limiting the position between the driving port and the driving rod 16.

[0066] Specifically, the operator turns the handwheel, so that the second gear 14 can be driven to rotate through the cooperation of the limit block 18 and the limit groove 17, and at the same time, the first gear 13 and the bidirectional threaded rod 12 can be driven to rotate synchronously through the transmission of the third gear 15, and then the two adjustment blocks 10 can be driven to move relative to each other through the thread cooperation of the adjustment block 10 and the bidirectional threaded rod 12.

[0067] Reference Figure 4 and Figure 5 The limiting mechanism includes a limiting groove 17, a limiting block 18 and a supporting mechanism. A plurality of limiting grooves 17 are opened on the side wall of the driving port. The limiting groove 17 passes through the side wall of the second gear 14 away from the handwheel side. A plurality of limiting blocks 18 are fixedly provided on the side wall of the driving rod 16. The limiting blocks 18 are adapted to the shape of the limiting grooves 17. The supporting mechanism is arranged in the mounting seat 4 for supporting the driving rod 16. The supporting mechanism includes an annular groove, a support plate 19 and a support spring 20. The annular groove is opened on the side wall of the driving groove, and the support plate 19 is slidably arranged in the annular groove, wherein the driving rod 16 is rotatably connected to the support plate 19, and the support spring 20 is sleeved on the driving rod 16, and the two ends of the support spring 20 are respectively in contact with the support plate 19 and the side wall of the annular groove.

[0068] Specifically, after completing the positioning of the mounting block 7, the operator can release the handwheel, so that the drive rod 16 can move under the action of the support spring 20, so that the limit block 18 can be disengaged from the limit groove 17, so that when the handwheel is rotated by external force, it can only drive the drive rod 16 to rotate but cannot drive the third gear to rotate, thereby improving the installation stability.

[0069] In this embodiment, when in use, in the process of closing the box cover 2, the mounting block 7 can be extended into the mounting opening 5, and then the operator pulls the hand wheel, so that the limit block 18 is extended into the limit groove 17 through the movement of the driving rod 16, and the operator rotates the hand wheel at the same time, so that the second gear 14 can be driven to rotate by the cooperation of the limit block 18 and the limit groove 17, and the first gear 13 and the bidirectional threaded rod 12 can be driven to rotate synchronously through the conduction of the third gear 15, and then the two adjusting blocks 10 can be driven to move relative to each other through the thread cooperation of the adjusting block 10 and the bidirectional threaded rod 12, so that the adjustment The section rod 11 drives the positioning block 8 to extend into the positioning slot 9. At the same time, the positioning block 8 cooperates with the positioning slot and the positioning slot 9 respectively to realize the positioning between the mounting block 7 and the mounting seat 4, thereby improving the protection and portability of the monitor. After completing the positioning of the mounting block 7, the operator can release the handwheel, so that the driving rod 16 can move under the action of the support spring 20, so that the limit block 18 can be disengaged from the limit slot 17. In the process of the handwheel being rotated by external force, it can only drive the driving rod 16 to rotate but cannot drive the third gear to rotate, thereby improving the installation stability.

[0070] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A portable residual current monitor, characterized in that: include: A protective box, comprising a box body (1) and a box cover (2), wherein the box cover (2) is hingedly arranged on the box body (1); A monitor body (3), the monitor body (3) being fixedly arranged in the box (1); A mounting seat (4), the mounting seat (4) being fixedly arranged on the box body (1); A mounting opening (5), wherein the mounting seat (4) is provided with a mounting opening (5); A mounting plate (6), the mounting plate (6) being fixedly arranged on the box cover (2), and a mounting block (7) being fixedly arranged on the mounting plate (6); A positioning mechanism is provided in the mounting seat (4) and is used for positioning between the mounting opening (5) and the mounting block (7).

2. A portable residual current monitor according to claim 1, characterized in that: The positioning mechanism comprises: Positioning grooves, the positioning grooves being provided on two side walls opposite to the mounting opening (5); A positioning block (8), the positioning block (8) being slidably disposed in the positioning groove; A positioning through groove (9), the positioning through groove (9) being provided on two opposite side walls of the mounting block (7); A relative movement mechanism is provided in the mounting seat (4) and is used to control the relative movement of the two positioning blocks (8).

3. A portable residual current monitor according to claim 2, characterized in that: The relative movement mechanism comprises: A first cavity is formed on one side of the positioning groove, and the first cavity is communicated with the positioning groove; Adjustment blocks (10), two adjustment blocks (10) are slidably arranged in the first cavity; an adjusting rod (11), the adjusting rod (11) being hingedly arranged between the positioning block (8) and the adjusting block (10); A relative movement component is provided in the first cavity and is used for controlling the relative movement of the two adjustment blocks (10) in the same first cavity.

4. A portable residual current monitor according to claim 3, characterized in that: The relative movement component includes: A threaded hole, the adjusting block (10) is provided with the threaded hole; a bidirectional threaded rod (12), the bidirectional threaded rod (12) being rotatably disposed in the first cavity, the bidirectional threaded rod (12) penetrating the two threaded holes through threaded engagement; A rotation mechanism is provided in the mounting seat (4) and is used to control the two bidirectional threaded rods (12) to rotate synchronously.

5. The portable residual current monitor according to claim 4, characterized in that: The rotating mechanism comprises: a second cavity, the second cavity being opened on one side of the two first cavities; a first gear (13), two first gears (13) being rotatably disposed in the second cavity, and the first gears (13) being fixedly connected to the bidirectional threaded rod (12); a second gear (14), the second gear (14) being rotatably disposed in the second cavity, and a third gear (15) being rotatably disposed between the second gear (14) and the first gear (13); Wherein, the third gear (15) is meshed with the first gear (13) and the second gear (14); A driving mechanism is provided on the mounting seat (4) and is used to control the second gear (14) to rotate.

6. The portable residual current monitor according to claim 5, characterized in that: The driving mechanism comprises: A driving groove, the driving groove being provided on the mounting seat (4); A drive port, the drive port being provided on the second gear (14), the drive port being aligned with the drive slot; A driving rod (16), the driving rod (16) being arranged in the driving groove, the driving rod (16) passing through the driving opening, and a hand wheel being fixedly arranged on the driving rod (16); A limiting mechanism is provided on the driving rod (16) and is used to limit the position between the driving port and the driving rod (16).

7. The portable residual current monitor according to claim 6, characterized in that: The limiting mechanism includes: A limiting groove (17), wherein a plurality of the limiting grooves (17) are provided on the side wall of the driving port, and the limiting grooves (17) penetrate the side wall of the second gear (14) away from the hand wheel; A limiting block (18), wherein a plurality of the limiting blocks (18) are fixedly provided on the side wall of the driving rod (16), and the limiting blocks (18) are adapted in shape to the limiting groove (17); A support mechanism is provided in the mounting seat (4) and is used to support the driving rod (16).

8. The portable residual current monitor according to claim 7, characterized in that: The supporting mechanism comprises: an annular groove, the annular groove being formed on a side wall of the driving groove; a support plate (19), the support plate (19) being slidably disposed in the annular groove; Wherein, the driving rod (16) is rotatably connected to the support plate (19); A support spring (20), wherein the support spring (20) is sleeved on the driving rod (16), and two ends of the support spring (20) are in contact with the support plate (19) and the side wall of the annular groove respectively.

9. The portable residual current monitor according to claim 8, characterized in that: The side wall of the box body (1) is provided with a heat dissipation opening (21).

10. The portable residual current monitor according to claim 9, characterized in that: A filter is provided in the heat dissipation port (21).

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