Pincer-shaped mutual inductor

Abstract

According to the technical scheme, the pincerlike mutual inductor is characterized in that a first shell and a second shell are included, each of the first shell and the second shell comprises a pivoting end and an opening and closing end, a locking mechanism is arranged at the opening and closing end, the locking mechanism comprises a locking bolt and a locking nut, a through mounting hole is formed in the first shell, and a through hole is formed in the second shell. The locking bolt is movably connected with the mounting hole, a spring is axially arranged in the mounting hole, the two ends of the spring abut against the head of the locking bolt and the inner wall of the mounting hole respectively, and the screw portion of the locking bolt extends out of the mounting hole. A butt joint hole corresponding to the mounting hole is formed in the second shell, the locking nut is fixedly arranged in the butt joint hole, and a screw rod part of the locking bolt extends into the butt joint hole and can be in threaded connection with the locking nut. The device is provided with the locking mechanism, and when long-time detection is needed, the locking mechanism can lock the mutual inductor, so that the mutual inductor is stably clamped.

Description

Technical Field

[0001] The utility model relates to the technical field of mutual inductors, and more specifically to a clamp-type mutual inductor. Background Art

[0002] The current transformer consists of a closed iron core and a winding. It is an instrument that converts a large primary current into a small secondary current based on the principle of electromagnetic induction to achieve current measurement.

[0003] There are many types of current transformers, and the clamp current transformer is a type of current transformer. The clamp current transformer is a handheld open-close current transformer that can measure current without disconnecting the measured line. It is easy to use and widely used.

[0004] However, the existing clamp-on current transformer still has the following problems: in order to facilitate opening and closing, the existing clamp-on current transformer generally uses elastic parts to clamp the opening and closing parts. This connection method has the advantages of being convenient and fast, but sometimes during maintenance or inspection, it is necessary to clamp and inspect the cable for a long time. The clamp-on current transformer will shake when clamped on the cable. Therefore, it is difficult to stably clamp the opening and closing parts of the transformer by relying on the elastic parts. When the contact end faces of the two internal iron cores are misaligned, the detection will be inaccurate, affecting normal use.

[0005] Based on this, the present application proposes a clamp-on transformer to solve the above problems. Utility Model Content

[0006] In view of the deficiencies in the prior art, the utility model provides a clamp-on transformer with a locking mechanism. When long-term detection is required, the locking mechanism can lock the transformer so that the transformer is stably clamped.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a clamp-on transformer, comprising a first shell and a second shell, the first shell and the second shell comprising a pivot end and an opening and closing end, characterized in that: a locking mechanism is arranged at the opening and closing end, the locking mechanism comprising a locking bolt and a locking nut, a penetrating mounting hole is arranged in the first shell, the locking bolt is movably connected to the mounting hole, a spring is axially arranged in the mounting hole, the two ends of the spring are respectively abutted against the head of the locking bolt and the inner wall of the mounting hole, and the screw portion of the locking bolt extends from the mounting hole; a docking hole corresponding to the mounting hole is arranged in the second shell, the locking nut is fixedly arranged in the docking hole, the screw portion of the locking bolt extends into the docking hole and can be threadedly connected with the locking nut.

[0008] The utility model is further configured as follows: a chamfered portion is provided on one side of the docking hole that is aligned with the mounting hole, and the chamfered portion is used to guide the screw portion of the locking bolt to extend into the docking hole.

[0009] The utility model is further configured as follows: the first shell and the second shell are provided with a first C-shaped portion and a second C-shaped portion which can be assembled with each other into a ring shape, the two ends of the first C-shaped portion are provided with a clamping groove, the two ends of the second C-shaped portion are provided with a protrusion, when the first C-shaped portion is assembled with the second C-shaped portion, the protrusion is embedded in the clamping groove.

[0010] The utility model is further configured as follows: a first sensing member is disposed in the first C-shaped portion, a second sensing member is disposed in the second C-shaped portion, both end surfaces of the first sensing member are disposed on the clamping groove, and both end surfaces of the second sensing member are disposed on the raised portion, and both ends of the first sensing member are abutted against and matched with both ends of the second sensing member.

[0011] The utility model is further configured as follows: the pivot end comprises a pivot shaft seat and a pivot hole seat which are rotatably matched, a torsion spring is arranged on the pivot end, and two ends of the torsion spring are respectively located on the pivot shaft seat and the pivot hole seat.

[0012] The utility model is further configured as follows: the first induction member and the second induction member include an iron core and a coil, the coil is provided with a lead wire, the first shell and the second shell are provided with a circuit module, and the lead wire is electrically connected to the circuit module.

[0013] In summary, the utility model has the following beneficial effects:

[0014] Compared with the prior art, the utility model adds a locking mechanism on the basis of the clamp-type transformer. When used for a short time, the locking mechanism plays an auxiliary positioning role. The first C-shaped part and the second C-shaped part of the transformer are accurately connected together by matching the locking bolt with the docking hole, and the protrusion and the clamping groove, thereby ensuring the accurate matching of the first sensing part and the second sensing part. When it is necessary to clamp for a long time, use a screwdriver to rotate the locking bolt so that the locking bolt and the locking nut are locked, so that the first C-shaped part and the second C-shaped part can be fixedly connected. Even if shaking, pulling, etc. occur, the first sensing part and the second sensing part can maintain stable matching, so that long-term stable and accurate detection can be achieved.

[0015] The utility model can be opened and closed quickly and conveniently according to different use requirements, and can also be stably clamped for a long time, and has strong versatility. Users can choose the corresponding clamping and fixing method according to needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of this embodiment;

[0017] Figure 2 It is a schematic diagram of the structure of this embodiment when it is opened;

[0018] Figure 3 Schematic diagram of the internal structure of this embodiment;

[0019] Figure 4 Schematic diagram of two states of the locking mechanism of this embodiment;

[0020] Figure 5 It is a schematic diagram of the structure of the pivot shaft seat and the pivot hole seat of this embodiment.

[0021] Figure numerals: 1. first shell; 2. second shell; 3. locking mechanism; 4. locking bolt; 5. locking nut; 6. mounting hole; 601. spring; 7. docking hole; 701. chamfered portion; 8. first C-shaped portion; 801. snap-fit ​​groove; 802. first sensing member; 9. second C-shaped portion; 901. raised portion; 902. second sensing member; 10. pivot shaft seat; 11. pivot hole seat; 12. iron core; 13. coil. DETAILED DESCRIPTION

[0022] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0023] This embodiment discloses a clamp-on transformer, such as Figure 1-5 As shown, it includes a first shell 1 and a second shell 2. The first shell 1 and the second shell 2 include a pivot end and an opening and closing end. A locking mechanism 3 is provided at the opening and closing end. The locking mechanism 3 includes a locking bolt 4 and a locking nut 5. A penetrating mounting hole 6 is provided in the first shell 1. The locking bolt 4 is movably connected to the mounting hole 6. Specifically, the locking bolt 4 can slide and rotate in the mounting hole 6. Both ends of the mounting hole 6 are shrink-fitted to prevent the locking bolt 4 from falling out. At the same time, a spring 601 is axially arranged in the mounting hole 6. Both ends of the spring 601 respectively abut against the head of the locking bolt 4 and the inner wall of the mounting hole 6. The screw portion of the locking bolt 4 extends from the mounting hole 6. A docking hole 7 corresponding to the mounting hole 6 is provided in the second shell 2. The locking nut 5 is fixedly arranged in the docking hole 7. The screw portion of the locking bolt 4 extends into the docking hole 7 and can be threadedly connected with the locking nut 5. Please refer to Figure 4 , Figure 4 The left side shows the state when the locking bolt 4 is inserted into the docking hole 7, which plays the function of auxiliary positioning. In this state, the locking bolt 4 is driven by the spring to extend only a small part, and the extended part can be inserted into the docking hole 7 when closed, playing a certain function of auxiliary opening and closing end positioning. Figure 4The right side is in a locked state. By inserting a screwdriver tool from the other end of the mounting hole 6, the locking bolt 4 can be driven to rotate so that the locking bolt 4 and the locking nut 5 can be fixed, thereby completely locking the open and closed ends. When the cable needs to be clamped for a long time for detection, the locking mechanism 3 can be locked to ensure that the connection at the open and closed ends is always stable, thereby ensuring a stable detection effect.

[0024] Furthermore, a chamfered portion 701 is provided on the side of the docking hole 7 aligned with the mounting hole 6, and the chamfered portion 701 is used to guide the screw portion of the locking bolt 4 to extend into the docking hole 7. Because the movement trajectory at the opening and closing ends of the first shell 1 and the second shell 2 is an arc, it is necessary to provide the chamfered portion 701 so that the locking bolt 4 can smoothly enter the docking hole 7 during the movement, thereby ensuring smooth use.

[0025] For further information, please refer to Figure 2 The first shell 1 and the second shell 2 are provided with a first C-shaped portion 8 and a second C-shaped portion 9 which can be assembled into a ring shape. The first C-shaped portion 8 is provided with a clamping groove 801 at both ends, and the second C-shaped portion 9 is provided with a protrusion 901 at both ends. When the first C-shaped portion 8 and the second C-shaped portion 9 are assembled, the protrusion 901 is engaged with the clamping groove 801. Through the above structure, the cooperation of the clamping groove 801 and the protrusion 901 further ensures that the opening and closing ends and the first C-shaped portion 8 and the second C-shaped portion 9 will not shake after the assembly.

[0026] For further information, please refer to Figure 3 , a first sensing member 802 is disposed in the first C-shaped portion 8, a second sensing member 902 is disposed in the second C-shaped portion 9, both end surfaces of the first sensing member 802 are disposed on the clamping groove 801, and both end surfaces of the second sensing member 902 are disposed on the protruding portion 901, and both ends of the first sensing member 802 are butted against and matched with both ends of the second sensing member 902. Through the above structure, through the cooperation of the clamping groove 801 and the protruding portion 901 and the cooperation of the locking bolt 4 and the docking hole 7, the end surfaces of the first sensing member 802 and the second sensing member 902 are accurately butted against and matched, thereby preventing the problem of inaccurate detection caused by the deviation of the end surfaces.

[0027] Furthermore, the pivot end includes a pivot shaft seat 10 and a pivot hole seat 11 that are rotatably matched. A torsion spring (not shown in the figure) is provided on the pivot end, and the two ends of the torsion spring are respectively located on the pivot shaft seat 10 and the pivot hole seat 11. Reliable rotational matching is achieved through the matching of the pivot shaft seat 10 and the pivot hole seat 11. At the same time, the torsion spring can drive the opening and closing end to close automatically. When only a short-time inspection is required, the opening and closing end is closed by relying on the torsion spring. If it is desired to open, it is only necessary to hold the two force arms of the pivot end tightly to control the opening of the opening and closing end, thereby retaining a convenient and quick use method for short-time inspection.

[0028] Furthermore, the first induction element 802 and the second induction element 902 include an iron core 12 and a coil 13, a lead wire (not shown in the figure) is provided on the coil 13, a circuit module (not shown in the figure) is provided in the first shell 1 and the second shell 2, and the lead wire is electrically connected to the circuit module. Through the above structure, the circuit module is connected to the wire to lead out the electrical signal from the shell, so as to transmit the signal to other external devices or display screens.

[0029] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the design concept of the present invention should be included in the protection scope of the present invention.

Claims

1. A clamp-on transformer, comprising a first housing (1) and a second housing (2), wherein the first housing (1) and the second housing (2) comprise a pivot end and an opening end, and characterized in that: A locking mechanism (3) is provided at the opening and closing end, and the locking mechanism (3) comprises a locking bolt (4) and a locking nut (5); a through mounting hole (6) is provided in the first housing (1), and the locking bolt (4) is movably connected to the mounting hole (6); a spring (601) is axially provided in the mounting hole (6), and two ends of the spring (601) respectively abut against the head of the locking bolt (4) and the inner wall of the mounting hole (6), and the screw portion of the locking bolt (4) extends out of the mounting hole (6); a docking hole (7) corresponding to the mounting hole (6) is provided in the second housing (2), and the locking nut (5) is fixedly arranged in the docking hole (7), and the screw portion of the locking bolt (4) extends into the docking hole (7) and can be threadedly connected with the locking nut (5).

2. A clamp-on transformer according to claim 1, characterized in that: A chamfered portion (701) is provided on the side of the docking hole (7) aligned with the mounting hole (6), and the chamfered portion (701) is used to guide the screw rod portion of the locking bolt (4) to extend into the docking hole (7).

3. A clamp-on transformer according to claim 1, characterized in that: The first shell (1) and the second shell (2) are provided with a first C-shaped portion (8) and a second C-shaped portion (9) which can be assembled with each other to form a ring shape, the first C-shaped portion (8) is provided with a clamping groove (801) at both ends, and the second C-shaped portion (9) is provided with a protrusion (901) at both ends, and when the first C-shaped portion (8) and the second C-shaped portion (9) are assembled, the protrusion (901) is engaged with the clamping groove (801).

4. A clamp-on transformer according to claim 3, characterized in that: A first sensing member (802) is disposed in the first C-shaped portion (8), and a second sensing member (902) is disposed in the second C-shaped portion (9). Both end surfaces of the first sensing member (802) are disposed on the snap-fit ​​groove (801), and both end surfaces of the second sensing member (902) are disposed on the protruding portion (901). The two ends of the first sensing member (802) are abutted against the two ends of the second sensing member (902).

5. A clamp-on transformer according to claim 1, characterized in that: The pivot end comprises a pivot shaft seat (10) and a pivot hole seat (11) which are rotatably matched, and a torsion spring is arranged on the pivot end, and the two ends of the torsion spring are respectively located on the pivot shaft seat (10) and the pivot hole seat (11).

6. A clamp-on transformer according to claim 4, characterized in that: The first induction element (802) and the second induction element (902) comprise an iron core (12) and a coil (13), wherein the coil (13) is provided with a lead wire, and the first shell (1) and the second shell (2) are provided with a circuit module, wherein the lead wire is electrically connected to the circuit module.

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