Pincer-shaped grounding resistance testing device

Abstract

The utility model belongs to the technical field of pincerlike instruments, and particularly relates to a pincerlike grounding resistance testing device. The movable clamp comprises a first clamp head shell, two first shielding mechanisms and two first iron cores, the first clamp head shell is pivoted with the shell, the two first shielding mechanisms are arranged in the first clamp head shell at an interval, and the two first iron cores are arranged in the first shielding mechanisms respectively; the fixed clamp comprises a second clamp head shell, two second shielding mechanisms and two second iron cores, the second clamp head shell is fixed to the shell, the two second shielding mechanisms are arranged in the second clamp head shell in a spaced mode, and the two second iron cores are arranged in the second shielding mechanisms respectively; the end, close to the shell, of the first shielding mechanism is connected with the end, close to the shell, of the second shielding mechanism. According to the clamp-shaped grounding resistance testing device, through the first shielding mechanism and the second shielding mechanism, the interference shielding effect can be improved, and the measurement precision is improved.

Description

Technical Field

[0001] The present application relates to the technical field of clamp meters, and in particular to a clamp ground resistance test device. Background Art

[0002] In the field of installation, maintenance and testing of electrical equipment, accurate measurement of ground resistance is crucial to ensure the safe and stable operation of the electrical system.

[0003] In the related art, the clamp head structure of the clamp-type ground resistance test device is relatively simple, and its measurement accuracy and stability are often difficult to meet complex measurement requirements. In addition, the material and manufacturing process of the clamp head may not be sophisticated enough, resulting in poor durability of the clamp head, which is prone to wear and deformation during long-term use, thereby affecting the measurement performance.

[0004] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present disclosure, and therefore may include information that does not constitute the prior art known to ordinary technicians in the field. Utility Model Content

[0005] In view of at least one of the above technical problems, the present application provides a clamp-type ground resistance testing device, which solves the problem that the durability of the clamp head is poor and it is easy to wear and deform during long-term use.

[0006] The present invention provides a clamp-type ground resistance test device, comprising:

[0007] case;

[0008] The movable pliers include: a first pliers head shell, a first shielding mechanism and a first iron core, wherein the first pliers head shell is pivotally connected to the housing, the first shielding mechanism has two and is spaced apart and arranged in the first pliers head shell, the two first shielding mechanisms are symmetrically arranged, and the first iron core has two and is respectively arranged in one of the first shielding mechanisms;

[0009] The fixed clamp comprises: a second clamp head shell, a second shielding mechanism and a second iron core, the second clamp head shell is fixed to the housing, the second shielding mechanism has two and is arranged in the second clamp head shell at intervals, the two second shielding mechanisms are arranged symmetrically, and the second iron core has two and is respectively arranged in one of the second shielding mechanisms;

[0010] Wherein, one end of the first shielding mechanism close to the shell is connected to one end of the second shielding mechanism close to the shell.

[0011] One of the above technical solutions has at least one of the following advantages or beneficial effects: the clamp-type ground resistance test device can improve the interference shielding effect and the measurement accuracy through the first shielding mechanism and the second shielding mechanism, and the end of the first shielding mechanism close to the shell is connected to the end of the second shielding mechanism close to the shell to ensure that the first shielding mechanism and the second shielding mechanism are always connected and inseparable during the opening and closing process of the clamp head, effectively avoiding the occurrence of misalignment or inability to close the movable clamp and the fixed clamp when closing.

[0012] In one possible implementation, a first docking structure is formed at one end of the first shielding mechanism close to the shell, and the first docking structure extends out of the first clamp head shell. A second docking structure is formed at one end of the second shielding mechanism close to the shell, and the second docking structure extends out of the second clamp head shell. The first docking structure is plugged into and matched with the second docking structure.

[0013] In a possible implementation, the first shielding mechanism includes: a first shielding component and a second shielding component both disposed in the first clamp head shell, the first shielding component having a first sliding portion at one end close to the shell, the second shielding component having a second sliding portion at one end close to the shell, the first sliding portion and the second sliding portion jointly forming a first docking structure, and the first iron core being located between the first shielding component and the second shielding component;

[0014] The second shielding mechanism comprises: a third shielding component and a fourth shielding component both disposed in the second clamp head shell, the third shielding component having a third sliding portion at one end close to the shell, the fourth shielding component having a fourth sliding portion at one end close to the shell, the third sliding portion and the fourth sliding portion jointly forming a second docking structure, and the second iron core being located between the third shielding component and the fourth shielding component;

[0015] The first sliding connection portion is slidably connected to the third sliding connection portion, and the second sliding connection portion is slidably connected to the fourth sliding connection portion.

[0016] In a possible implementation, the first shielding mechanism further includes: a first outer shielding sheet and a first inner shielding sheet spaced apart in the first clamp head shell, the first outer shielding sheet being connected to the first shielding assembly and the second shielding assembly respectively, and the first inner shielding sheet being connected to the first shielding assembly and the second shielding assembly respectively;

[0017] The second shielding mechanism also includes: a second outer shielding sheet and a second inner shielding sheet spaced apart in the second clamp head shell, the second outer shielding sheet is respectively connected to the third shielding assembly and the fourth shielding assembly, and the second inner shielding sheet is respectively connected to the third shielding assembly and the fourth shielding assembly.

[0018] In a possible implementation, the first iron core includes: a first fixing frame, a first iron sheet and a second iron sheet, the first fixing frame is arranged in the first shielding mechanism, the first iron sheet and the second iron sheet have a plurality of pieces and are staggered and stacked in the first fixing frame, and a first matching structure is formed between the first iron sheet and the second iron sheet;

[0019] The second iron core comprises: a second fixing frame, a third iron sheet and a fourth iron sheet, the third fixing frame is arranged in the second shielding mechanism, a plurality of the third iron sheets and the fourth iron sheets are provided and staggered and stacked in the second fixing frame, and a second matching structure is formed between the third iron sheets and the fourth iron sheets;

[0020] The first matching structure is docked with the second matching structure.

[0021] In a possible implementation, the first iron sheet includes: a first end and a second end, the second iron sheet includes a third end and a fourth end, the first end and the third end form a first step structure, the second end and the fourth end form a second step structure, and the first step structure and the second step structure are collectively defined as a first matching structure;

[0022] The third iron sheet includes: a fifth end and a sixth end; the fourth iron sheet includes: a seventh end and an eighth end; the fifth end and the seventh end form a third step structure; the sixth end and the eighth end form a fourth step structure; the third step structure and the fourth step structure are collectively defined as a second matching structure;

[0023] The first step structure is connected to the third step structure, and the second step structure is connected to the fourth step structure.

[0024] In one possible implementation, one end of the second end facing the sixth end is set to a double-sided chamfer, one end of the third end facing the seventh end is set to a double-sided chamfer, one end of the fifth end facing the first end is set to a double-sided chamfer, and one end of the eighth end facing the fourth end is set to a double-sided chamfer.

[0025] In a possible implementation, the first fixing frame is provided with a plurality of first positioning posts, and the first shielding mechanism is provided with first positioning holes matched with the first positioning posts;

[0026] The second fixing frame is provided with a plurality of second positioning posts, and the second shielding mechanism is provided with second positioning holes matched with the second positioning posts.

[0027] In a possible implementation, the movable pliers further include: a first buffer mechanism, the first buffer mechanism being disposed on the first shielding mechanism;

[0028] The fixed clamp further includes: a second buffer mechanism, and the second buffer mechanism is arranged on the second shielding mechanism.

[0029] In a possible implementation, the first buffer mechanism and the second buffer mechanism are foam pads. The present invention is further described below in conjunction with the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0031] Figure 1 A structural diagram of a clamp-type ground resistance test device provided in an embodiment of the present application;

[0032] Figure 2 A partial structural diagram of the clamp-type ground resistance test device provided in an embodiment of the present application in an open state;

[0033] Figure 3 An exploded structural diagram of the movable clamp and the fixed clamp provided in the embodiment of the present application;

[0034] Figure 4 A closed schematic diagram of a first iron core and a second iron core provided in an embodiment of the present application;

[0035] Figure 5 A schematic diagram of a combination of a first iron sheet, a second iron sheet, a third iron sheet, and a fourth iron sheet provided in an embodiment of the present application;

[0036] Wherein, the accompanying drawings are marked as follows:

[0037] 100. Shell;

[0038] 200, movable pliers; 210, first pliers head shell; 220, first shielding mechanism; 230, first iron core; 240, first docking structure; 250, first buffer mechanism;

[0039] 221, first shielding assembly; 222, second shielding assembly; 223, first outer shielding sheet; 224, first inner shielding sheet;

[0040] 2211, first sliding connection portion; 2221, second sliding connection portion;

[0041] 231, first fixing frame; 232, first iron sheet; 233, second iron sheet; 234, first matching structure;

[0042] 2321, first end; 2322, second end; 2331, third end; 2332, fourth end;

[0043] 2311, first positioning column;

[0044] 300, fixed clamp; 310, second clamp head shell; 320, second shielding mechanism; 330, second iron core; 340, second docking structure; 350, second buffer mechanism;

[0045] 321, third shielding assembly; 322, fourth shielding assembly; 323, second outer shielding sheet; 324, second inner shielding sheet;

[0046] 3211, third sliding connection portion; 3221, fourth sliding connection portion;

[0047] 331, second fixing frame; 332, third iron sheet; 333, fourth iron sheet; 334, second matching structure;

[0048] 3321, fifth end; 3322, sixth end; 3331, seventh end; 3332, eighth end;

[0049] 3311, second positioning column; DETAILED DESCRIPTION

[0050] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0051] In the related art, the movable jaw and the fixed jaw have poor stability when opening and closing due to their own weight. Specifically, when opening, the shielding mechanism in the movable jaw and the shielding mechanism in the fixed jaw will separate. When closing, the shielding mechanism in the movable jaw and the shielding mechanism in the fixed jaw will reconnect, so it is easy for the shielding mechanism of the movable jaw and the shielding mechanism of the fixed jaw to be misaligned or interfere with each other and fail to close, thereby affecting the use.

[0052] This clamp-type grounding resistance test device can improve the interference shielding effect and the measurement accuracy through the first shielding mechanism and the second shielding mechanism. In addition, one end of the first shielding mechanism close to the shell is connected to the other end of the second shielding mechanism close to the shell to ensure that the first shielding mechanism and the second shielding mechanism are always connected and inseparable during the opening and closing process of the clamp head, effectively avoiding the situation where the movable clamp and the fixed clamp are misaligned or cannot be closed when closing.

[0053] The specific structure of the clamp-type grounding resistance testing device in the embodiment of the present application is introduced as follows.

[0054] Figure 1A structural diagram of a clamp-type ground resistance test device provided in an embodiment of the present application; Figure 2 A partial structural diagram of the clamp-type ground resistance test device provided in an embodiment of the present application in an open state; Figure 3 The exploded structure diagram of the movable clamp and the fixed clamp provided in the embodiment of the present application; Figure 1 , Figure 2 and Figure 3 As shown, an embodiment of the present application provides a clamp-type grounding resistance testing device, including: a housing 100 , a movable clamp 200 and a fixed clamp 300 .

[0055] Shell 100; movable pliers 200, including: a first pliers head shell 210, a first shielding mechanism 220 and a first iron core 230, the first pliers head shell 210 is pivotally connected to the shell 100, the first shielding mechanism 220 has two and is spaced apart in the first pliers head shell 210, the first iron core 230 has two and is respectively disposed in a first shielding mechanism 220; fixed pliers 300, including: a second pliers head shell 310, a second shielding mechanism 320 and a second iron core 330, the second pliers head shell 310 is fixed to the shell 100, the second shielding mechanism 320 has two and is spaced apart in the second pliers head shell 310, the second iron core 330 has two and is respectively disposed in a second shielding mechanism 320; wherein, one end of the first shielding mechanism 220 close to the shell 100 is connected to one end of the second shielding mechanism 320 close to the shell 100.

[0056] When the clamp-type grounding resistance test device of this embodiment is closed, the first clamp head shell 210 contacts the opposite ends of the second clamp head shell 310, the first shielding mechanism 220 contacts the opposite ends of the second shielding mechanism 320, and the first iron core 230 contacts the opposite ends of the second iron core 330. When it is opened, the first clamp head shell 210 and the opposite ends of the second clamp head shell 310 are separated, the end of the first shielding mechanism 220 away from the housing 100 is separated from the end of the second shielding mechanism 320 away from the housing 100, the end of the first shielding mechanism 220 close to the housing 100 and the end of the second shielding mechanism 320 close to the housing 100 are always in a connected state, and the opposite ends of the first iron core 230 and the second iron core 330 are separated. In this way, the first shielding mechanism 220 and the second shielding mechanism 320 are not completely separated after the movable clamp 200 and the fixed clamp 300 are opened, and can guide the opening and closing movement of the clamp head of the clamp-type grounding resistance testing device, thereby effectively avoiding the movable clamp 200 and the fixed clamp 300 from being misaligned or unable to close when closing.

[0057] Continue reading Figure 3 As shown, in some embodiments, two first shielding mechanisms 220 are symmetrically disposed in the first clamp housing 210 . Two second shielding mechanisms 320 are symmetrically disposed in the second clamp housing 310 .

[0058] Continue reading Figure 3 As shown, in some embodiments, the first jaw housing 210 may include: a first upper housing, a center housing of the movable jaw 200 and a first lower housing, the center housing of the movable jaw 200 is pivotally connected to the housing 100, the first upper housing and the first lower housing are respectively embedded in the center housing of the movable jaw 200, and the two first shielding mechanisms 220 are respectively disposed on the center housing of the movable jaw 200. In this way, the embedded structure of the first jaw housing 210 makes the structure of the movable jaw 200 more stable and reliable.

[0059] In addition, positioning protrusions are provided on the inner surface of the first upper shell facing the center shell of the movable pliers 200, the inner surface of the first lower shell facing the center shell of the movable pliers 200, and the inner surfaces of the center shell of the movable pliers 200 facing the first upper shell and the first lower shell respectively, and holes matching the positioning protrusions are provided on the first shielding mechanism 220, so that the first pliers head shell 210 and the first shielding mechanism 220 can be easily installed and positioned to avoid displacement of the first shielding mechanism 220.

[0060] Continue reading Figure 3 As shown, in some embodiments, the second clamp head shell 310 may include: a second upper shell, a central shell of the fixed clamp 300 and a second lower shell, the central shell of the fixed clamp 300 is fixedly connected to the housing 100, the second upper shell and the second lower shell are respectively embedded in the central shell of the fixed clamp 300, and the two second shielding mechanisms 320 are respectively arranged on the central shell of the fixed clamp 300. In this way, the embedded structure of the second clamp head shell 310 makes the structure of the fixed clamp 300 more stable and reliable.

[0061] In addition, positioning protrusions are provided on the inner surface of the second upper shell facing the central shell of the fixed clamp 300, the inner surface of the second lower shell facing the central shell of the fixed clamp 300, and the inner surfaces of the central shell of the fixed clamp 300 facing the second upper shell and the second lower shell respectively, and holes matching the positioning protrusions are provided on the first shielding mechanism 220, so that the second clamp head shell 310 and the second shielding mechanism 320 can be easily installed and positioned to avoid displacement of the second shielding mechanism 320.

[0062] like Figure 2 and Figure 3 As shown, in some embodiments, a first docking structure 240 is formed at one end of the first shielding mechanism 220 close to the shell 100, and the first docking structure 240 extends out of the first clamp head shell 210, and a second docking structure 340 is formed at one end of the second shielding mechanism 320 close to the shell 100, and the second docking structure 340 extends out of the second clamp head shell 310, and the first docking structure 240 is plugged into and matched with the second docking structure 340.

[0063] When the clamp-type grounding resistance test device is closed, the first docking structure 240 of the first shielding mechanism 220 is plugged into the second docking structure 340 of the second shielding mechanism 320, and the shapes of the first docking structure 240 of the first shielding mechanism 220 and the second docking structure 340 of the second shielding mechanism 320 are adapted to each other, so that the movable clamp 200 and the fixed clamp 300 fit closely when closed. When the clamp-type grounding resistance test device is opened, part of the first docking structure 240 of the first shielding mechanism 220 and part of the second docking structure 340 of the second shielding mechanism 320 overlap in a direction perpendicular to the length direction of the clamp-type grounding resistance test device, that is, during the opening process of the clamp-type grounding resistance test device, the first docking structure 240 of the first shielding mechanism 220 and the second docking structure 340 of the second shielding mechanism 320 are always connected, so that the clamp head can be opened and closed more smoothly and not easily misplaced.

[0064] like Figure 2 and Figure 3 As shown, in some embodiments, the first shielding mechanism 220 includes: a first shielding component 221 and a second shielding component 222, both of which are arranged in the first clamp head shell 210, the first shielding component 221 has a first sliding portion 2211 at one end close to the shell 100, and the second shielding component 222 has a second sliding portion 2221 at one end close to the shell 100, the first sliding portion 2211 and the second sliding portion 2221 together form a first docking structure 240, and the first iron core 230 is located between the first shielding component 221 and the second shielding component 222.

[0065] The first shielding component 221 is disposed close to the first upper shell or the first lower shell. The first shielding component 221 may include: a first shielding long sheet and a first shielding short sheet, the first shielding long sheet and the first shielding short sheet are stacked, one end of the first shielding long sheet close to the shell 100 protrudes toward the third shielding component 321 to form a first arc-shaped protrusion, and one end of the first shielding short sheet close to the shell 100 is concave toward itself to form a first arc-shaped depression. In the first shielding component 221, a first arc-shaped protrusion and a first arc-shaped depression are collectively defined as a first sliding portion 2211.

[0066] The second shielding assembly 222 is arranged near the central shell of the movable jaw 200. The second shielding assembly 222 may include: two first shielding long sheets and two first shielding short sheets, the two first shielding long sheets and the two first shielding short sheets are arranged in an alternating stack, one end of the first shielding long sheet close to the housing 100 protrudes toward the fourth shielding assembly 322 to form a first arc-shaped protrusion, and one end of the first shielding short sheet close to the housing 100 is concave toward itself to form a first arc-shaped depression. In the second shielding assembly 222, the two first arc-shaped protrusions and the two first arc-shaped depressions are collectively defined as a second sliding portion 2221.

[0067] It is worth noting that the first shielding long sheet in the first shielding assembly 221 has the same structure as the first shielding long sheet in the second shielding assembly 222. The first shielding short sheet in the first shielding assembly 221 has the same structure as the first shielding short sheet in the second shielding assembly 222.

[0068] The second shielding mechanism 320 includes: a third shielding component 321 and a fourth shielding component 322 both disposed in the second clamp head shell 310, the third shielding component 321 having a third sliding portion 3211 at one end close to the housing 100, the fourth shielding component 322 having a fourth sliding portion 3221 at one end close to the housing 100, the third sliding portion 3211 and the fourth sliding portion 3221 together forming a second docking structure 340, the second iron core 330 being located between the third shielding component 321 and the fourth shielding component 322;

[0069] The third shielding component 321 is arranged close to the second upper shell or the second lower shell. The third shielding component 321 may include: a second shielding long sheet and a second shielding short sheet, the second shielding long sheet and the second shielding short sheet are stacked, one end of the second shielding long sheet close to the shell 100 protrudes toward the first shielding component 221 to form a second arc-shaped protrusion, and one end of the second shielding short sheet close to the shell 100 is concave toward itself to form a second arc-shaped depression. In the second shielding component 222, a second arc-shaped protrusion and a second arc-shaped depression are collectively defined as a third sliding portion 3211.

[0070] The fourth shielding component 322 is arranged near the central shell of the fixed clamp 300. The fourth shielding component 322 may include: two second shielding long sheets and two second shielding short sheets, the two second shielding long sheets and the two second shielding short sheets are stacked alternately, one end of the second shielding long sheet close to the shell 100 protrudes toward the second shielding component 222 to form a second arc-shaped protrusion, and one end of the second shielding short sheet close to the shell 100 is concave toward itself to form a second arc-shaped depression. In the fourth shielding component 322, the two first arc-shaped protrusions and the two first arc-shaped depressions are collectively defined as a fourth sliding portion 3221.

[0071] It is worth noting that the second shielding long piece in the third shielding component 321 has the same structure as the second shielding long piece in the fourth shielding component 322. The second shielding short piece in the third shielding component 321 has the same structure as the second shielding short piece in the fourth shielding component 322.

[0072] The first sliding connection part 2211 is slidably connected with the third sliding connection part 3211, and the second sliding connection part 2221 is slidably connected with the fourth sliding connection part 3221. In this way, when the movable clamp 200 is opened relative to the fixed clamp 300, in the direction perpendicular to the length direction of the clamp-type grounding resistance test device, part of the first sliding connection part 2211 always overlaps with part of the third sliding connection part 3211, and part of the second sliding connection part 2221 always overlaps with part of the fourth sliding connection part 3221, that is, the first arc-shaped protrusion and the second arc-shaped protrusion can increase the overlapping area of ​​the first sliding connection part 2211 and the third sliding connection part 3211, and can also increase the overlapping area of ​​the second sliding connection part 2221 and the fourth sliding connection part 3221, so as to keep the movable clamp 200 and the fixed clamp 300 connected and not separated.

[0073] like Figure 2 and Figure 3 As shown, in some embodiments, the first shielding mechanism 220 also includes: a first outer shielding sheet 223 and a first inner shielding sheet 224 spaced apart in the first clamp head shell 210, the first outer shielding sheet 223 being respectively connected to the first shielding component 221 and the second shielding component 222, and the first inner shielding sheet 224 being respectively connected to the first shielding component 221 and the second shielding component 222; in this way, the first shielding mechanism 220 covers the first iron core 230 in all directions through the first outer shielding sheet 223, the first inner shielding sheet 224, the first shielding component 221 and the second shielding component 222, thereby enhancing the shielding enhancement effect.

[0074] In addition, the first outer shielding sheet 223 is plugged and matched with the first shielding component 221 and the second shielding component 222, respectively, so as to improve the connection stability between the first outer shielding sheet 223 and the first shielding component 221 and the second shielding component 222. The first inner shielding sheet 224 is plugged and matched with the first shielding component 221 and the second shielding component 222, respectively, so as to improve the connection stability between the first inner shielding sheet 224 and the first shielding component 221 and the second shielding component 222.

[0075] The second shielding mechanism 320 further includes: a second outer shielding sheet 323 and a second inner shielding sheet 324 which are spaced apart in the second clamp head shell 310, the second outer shielding sheet 323 is respectively connected to the third shielding assembly 321 and the fourth shielding assembly 322, and the second inner shielding sheet 324 is respectively connected to the third shielding assembly 321 and the fourth shielding assembly 322. In this way, the second shielding mechanism 320 covers the second core 330 in all directions through the second outer shielding sheet 323, the second inner shielding sheet 324, the third shielding assembly 321 and the fourth shielding assembly 322, thereby enhancing the shielding enhancement effect.

[0076] In addition, the second outer shielding sheet 323 is plugged and matched with the third shielding component 321 and the fourth shielding component 322, respectively, so as to improve the connection stability between the second outer shielding sheet 323 and the third shielding component 321 and the fourth shielding component 322. The second inner shielding sheet 324 is plugged and matched with the third shielding component 321 and the fourth shielding component 322, respectively, so as to improve the connection stability between the second inner shielding sheet 324 and the third shielding component 321 and the fourth shielding component 322.

[0077] Figure 4 A closed schematic diagram of the first iron core 230 and the second iron core 330 provided in an embodiment of the present application; Figure 5 A schematic diagram of the combination of the first iron sheet 232, the second iron sheet 233, the third iron sheet 332, and the fourth iron sheet 333 provided in the embodiment of the present application; the specific structure of the first iron core 230 and the second iron core 330 is introduced as follows.

[0078] like Figure 4 and Figure 5 As shown, in some embodiments, the first iron core 230 includes: a first fixing frame 231, a first iron sheet 232 and a second iron sheet 233, the first fixing frame 231 is disposed in the first shielding mechanism 220, there are a plurality of first iron sheets 232 and second iron sheets 233, and they are staggered and stacked in the first fixing frame 231, and a first matching structure 234 is formed between the first iron sheet 232 and the second iron sheet 233;

[0079] The second iron core 330 includes: a second fixing frame 331, a third iron sheet 332 and a fourth iron sheet 333, the third fixing frame is disposed in the second shielding mechanism 320, there are a plurality of third iron sheets 332 and fourth iron sheets 333, and they are staggered and stacked in the second fixing frame 331, and a second matching structure 334 is formed between the third iron sheet 332 and the fourth iron sheet 333;

[0080] The first mating structure 234 is mated with the second mating structure.

[0081] Specifically, the first iron sheet 232 includes: a first end 2321 and a second end 2322, the second iron sheet 233 includes a third end 2331 and a fourth end 2332, the first end 2321 and the third end 2331 form a first step structure, the second end 2322 and the fourth end 2332 form a second step structure, and the first step structure and the second step structure are collectively defined as a first matching structure 234;

[0082] The third iron sheet 332 includes: a fifth end 3321 and a sixth end 3322; the fourth iron sheet 333 includes: a seventh end 3331 and an eighth end 3332; the fifth end 3321 and the seventh end 3331 form a third step structure; the sixth end 3322 and the eighth end 3332 form a fourth step structure; the third step structure and the fourth step structure are collectively defined as a second matching structure 334;

[0083] The first step structure is connected to the third step structure, and the second step structure is connected to the fourth step structure.

[0084] Such an arrangement can ensure that the clamp-type grounding resistance test device is opened and closed smoothly and is not easily misplaced.

[0085] like Figure 4 and Figure 5 As shown, in some embodiments, the end of the second end 2322 facing the sixth end 3322 is set to be double-sided chamfered, the end of the third end 2331 facing the seventh end 3331 is set to be double-sided chamfered, the end of the fifth end 3321 facing the first end 2321 is set to be double-sided chamfered, and the end of the eighth end 3332 facing the fourth end 2332 is set to be double-sided chamfered. In this way, the first iron core 230 and the second iron core 330 have a guiding function, so that the movable jaw 200 and the fixed jaw 300 are more smoothly closed.

[0086] like Figure 3 and Figure 4 As shown, in some embodiments, the first fixing frame 231 has a plurality of first positioning posts 2311, and the first shielding mechanism 220 is provided with first positioning holes that match the first positioning posts 2311. Such a configuration facilitates the positioning and installation of the first fixing frame 231 and the first shielding mechanism 220, and improves the connection stability of the first fixing frame 231 and the first shielding mechanism 220.

[0087] The second fixing frame 331 has a plurality of second positioning posts 3311, and the second shielding mechanism 320 is provided with second positioning holes that match the second positioning posts 3311. This arrangement facilitates the positioning and installation of the second fixing frame 331 and the second shielding mechanism 320, and improves the connection stability of the second fixing frame 331 and the second shielding mechanism 320.

[0088] like Figure 3 and Figure 4 As shown, in some embodiments, the movable clamp 200 further includes: a first buffer mechanism 250, and the first buffer mechanism 250 is disposed on the first shielding mechanism 220;

[0089] The fixed clamp 300 further includes a second buffer mechanism 350 , which is disposed on the second shielding mechanism 320 .

[0090] Specifically, the first buffer mechanism 250 and the second buffer mechanism 350 are foam pads, so as to fill the tolerance between the first shielding mechanism 220 and the first clamp head shell 210 , or fill the tolerance between the second shielding mechanism 320 and the second clamp head shell 310 .

[0091] In the description of the present application, it should be understood that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application 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, and therefore should not be understood as a limitation on the present application.

[0092] In the description of the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being “above”, “above”, and “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, and “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0093] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation method.

[0094] In the description of the present application, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present application, "plurality" means at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0095] In the embodiments of the present application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0096] The above is only a preferred embodiment of the present application and does not constitute any formal limitation to the present application. Any technician familiar with the art can make many possible changes and modifications to the technical solution of the present application by using the above disclosed methods and technical contents without departing from the scope of the technical solution of the present application, or modify it into an equivalent embodiment of equivalent changes. Therefore, all equivalent changes made according to the shape, structure and principle of the present application without departing from the content of the technical solution of the present application should be included in the protection scope of the present application.

Claims

1. A clamp-type ground resistance test device, characterized in that: include: case; A movable pliers comprises: a first pliers head shell, a first shielding mechanism and a first iron core, wherein the first pliers head shell is pivotally connected to the housing, the first shielding mechanism has two and is arranged in the first pliers head shell at intervals, the two first shielding mechanisms are arranged symmetrically, and the first iron core has two and is respectively arranged in one of the first shielding mechanisms; The fixed clamp comprises: a second clamp head shell, a second shielding mechanism and a second iron core, wherein the second clamp head shell is fixed to the housing, the second shielding mechanism has two and is arranged in the second clamp head shell at intervals, the two second shielding mechanisms are arranged symmetrically, and the second iron core has two and is respectively arranged in one of the second shielding mechanisms; Wherein, one end of the first shielding mechanism close to the shell is connected to one end of the second shielding mechanism close to the shell.

2. The clamp-type ground resistance test device according to claim 1, characterized in that: A first docking structure is formed at one end of the first shielding mechanism close to the shell, and the first docking structure extends out of the first clamp head shell. A second docking structure is formed at one end of the second shielding mechanism close to the shell, and the second docking structure extends out of the second clamp head shell. The first docking structure is plugged into and matched with the second docking structure.

3. The clamp-type ground resistance test device according to claim 2, characterized in that: The first shielding mechanism comprises: a first shielding component and a second shielding component both disposed in the first clamp head shell, the first shielding component having a first sliding portion at one end close to the shell, the second shielding component having a second sliding portion at one end close to the shell, the first sliding portion and the second sliding portion jointly forming the first docking structure, the first iron core being located between the first shielding component and the second shielding component; The second shielding mechanism comprises: a third shielding component and a fourth shielding component both disposed in the second clamp head shell, the third shielding component having a third sliding portion at one end close to the shell, the fourth shielding component having a fourth sliding portion at one end close to the shell, the third sliding portion and the fourth sliding portion jointly forming the second docking structure, the second iron core being located between the third shielding component and the fourth shielding component; The first sliding connection portion is slidably connected to the third sliding connection portion, and the second sliding connection portion is slidably connected to the fourth sliding connection portion.

4. The clamp-type ground resistance test device according to claim 3, characterized in that: The first shielding mechanism further includes: a first outer shielding sheet and a first inner shielding sheet spaced apart in the first clamp head shell, the first outer shielding sheet being connected to the first shielding assembly and the second shielding assembly respectively, and the first inner shielding sheet being connected to the first shielding assembly and the second shielding assembly respectively; The second shielding mechanism also includes: a second outer shielding sheet and a second inner shielding sheet spaced apart in the second clamp head shell, the second outer shielding sheet is respectively connected to the third shielding assembly and the fourth shielding assembly, and the second inner shielding sheet is respectively connected to the third shielding assembly and the fourth shielding assembly.

5. The clamp-type ground resistance test device according to claim 1, characterized in that: The first iron core comprises: a first fixing frame, a first iron sheet and a second iron sheet, the first fixing frame is arranged in the first shielding mechanism, there are a plurality of the first iron sheets and the second iron sheets, and the first iron sheets and the second iron sheets are staggered and stacked in the first fixing frame, and a first matching structure is formed between the first iron sheets and the second iron sheets; The second iron core comprises: a second fixing frame, a third iron sheet and a fourth iron sheet, the second fixing frame is arranged in the second shielding mechanism, the third iron sheet and the fourth iron sheet have a plurality of pieces and are staggered and stacked in the second fixing frame, and a second matching structure is formed between the third iron sheet and the fourth iron sheet; The first matching structure is docked with the second matching structure.

6. The clamp-type ground resistance test device according to claim 5, characterized in that: The first iron sheet includes: a first end and a second end, the second iron sheet includes a third end and a fourth end, the first end and the third end form a first step structure, the second end and the fourth end form a second step structure, and the first step structure and the second step structure are collectively defined as a first matching structure; The third iron sheet includes: a fifth end and a sixth end; the fourth iron sheet includes: a seventh end and an eighth end; the fifth end and the seventh end form a third step structure; the sixth end and the eighth end form a fourth step structure; the third step structure and the fourth step structure are collectively defined as a second matching structure; The first step structure is butted against the third step structure, and the second step structure is butted against the fourth step structure.

7. The clamp-type ground resistance test device according to claim 6, characterized in that: One end of the second end portion facing the sixth end portion is set to a double-sided chamfer, one end of the third end portion facing the seventh end portion is set to a double-sided chamfer, one end of the fifth end portion facing the first end portion is set to a double-sided chamfer, and one end of the eighth end portion facing the fourth end portion is set to a double-sided chamfer.

8. The clamp-type ground resistance test device according to claim 5, characterized in that: The first fixing frame is provided with a plurality of first positioning posts, and the first shielding mechanism is provided with first positioning holes matched with the first positioning posts; The second fixing frame is provided with a plurality of second positioning posts, and the second shielding mechanism is provided with second positioning holes matched with the second positioning posts.

9. The clamp-type ground resistance test device according to claim 1, characterized in that: The movable clamp further includes: a first buffer mechanism, wherein the first buffer mechanism is arranged on the first shielding mechanism; The fixed clamp further includes: a second buffer mechanism, and the second buffer mechanism is arranged on the second shielding mechanism.

10. The clamp-type ground resistance test device according to claim 9, characterized in that: The first buffer mechanism and the second buffer mechanism are foam pads.

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