Grounding measuring tool

Abstract

The invention provides a measuring tool for grounding. The measuring tool comprises a seat body; the transmission gear is rotatably arranged on the seat body; the insertion rod is arranged on the transmission gear in a penetrating mode and matched with the transmission gear in a rotation stopping mode, and the insertion rod can move up and down relative to the transmission gear; the driving part comprises a driving gear, the driving gear can be meshed with the transmission gear to drive the transmission gear to rotate, and the transmission gear rotates to drive the insertion rod to rotate and move up and down; and the detector is electrically connected with the insertion rod. According to the technical scheme, the problems that in the related technology, a measuring tool for grounding is large in size and weight and inconvenient to carry are effectively solved.

Description

Technical Field

[0001] The present invention relates to the technical field of grounding measurement tools, and in particular to a grounding measurement tool. Background Art

[0002] The grounding measuring tool includes a rod for measuring grounding resistance and a detector for measuring grounding resistance value, and the detector is electrically connected to the rod. In the power industry, the grounding measuring tool is used to measure the grounding resistance of the rod to determine whether the grounding resistance of the rod meets the requirements of power regulations.

[0003] In the related art, the Chinese patent "A Ground Resistance Measuring Instrument" (application number: CN201711281489.4) discloses a ground resistance measuring instrument, which includes the following steps: a bracket is arranged above the soil to be measured, a cross bar is slidably arranged on the bracket in the vertical direction, and a first current electrode, a first voltage electrode, a second voltage electrode and a second current electrode are arranged under the cross bar; the spacing a between the first current electrode and the first voltage electrode is measured; the current signal I is measured; the voltage signal U is measured; the resistivity of the soil is calculated according to the formula: ρ=2πaU / I; a remote control circuit is arranged on the cross bar; the remote control circuit includes: a summary module, a first communication module, a data processing module, and a data storage module; by placing the bracket above the selected soil, the measured voltage value and current value are transmitted to the data processing module through the summary module and the first communication module, the soil resistivity is obtained, the soil resistivity is stored in the data storage module, and the long-term change law of the soil resistivity is obtained.

[0004] However, in the above-mentioned related technologies, the electrodes are inserted into the soil through hydraulic cylinders and drive motors. However, since the location of soil resistivity is mostly in the field, the operation location cannot be fixed. The above-mentioned ground resistance measuring instrument needs to be equipped with a corresponding power supply, and the size and weight of the hydraulic cylinder and drive motor are large, which is not convenient to carry and difficult to adapt to the requirements of field operations. Summary of the invention

[0005] The main purpose of the present invention is to provide a grounding measurement tool to solve the problem that the grounding measurement tool in the related art is large in size and weight and inconvenient to carry.

[0006] In order to achieve the above-mentioned purpose, the present invention provides a grounding measurement tool, including: a seat body; a transmission gear, rotatably arranged on the seat body; an insertion rod, inserted through the transmission gear and engaged with the transmission gear to prevent rotation, and the insertion rod can move up and down relative to the transmission gear; a driving member, including a driving gear, the driving gear can mesh with the transmission gear to drive the transmission gear to rotate, and the transmission gear rotates to drive the insertion rod to rotate and move up and down; a detector, electrically connected to the insertion rod.

[0007] Furthermore, a first through hole is provided on the transmission gear, and the insertion rod is inserted into the first through hole and cooperates with the first through hole to stop rotation; and / or, the seat body includes a seat body and a cross beam arranged above the seat body, the transmission gear is located between the seat body and the cross beam, and the grounding measuring tool also includes a rotating ring rotatably arranged on the cross beam, the rotating ring is provided with a second through hole, the insertion rod is inserted into the second through hole and cooperates with the second through hole to stop rotation, and the insertion rod can move up and down relative to the rotating ring.

[0008] Furthermore, there are multiple transmission gears and multiple insertion rods, and the multiple transmission gears and multiple insertion rods are arranged one by one, and the multiple insertion rods are arranged at equal intervals. The driving gear is movably arranged on the seat body, and the driving gear can selectively engage with one of the multiple transmission gears.

[0009] Furthermore, a slide groove is provided on the seat body, and the driving member also includes a slider and a flap hinged to the slider, the slider is slidably arranged in the slide groove, and the driving gear is rotatably arranged on the flap; the flap swings relative to the slider so that the driving gear has a transmission state of meshing with the transmission gear and a separation state of being separated from the transmission gear.

[0010] Furthermore, a first positioning structure is arranged between the seat body and the first end of the flap, the first positioning structure comprising a first positioning groove and a first positioning protrusion which can be inserted into the first positioning groove, one of the first positioning groove and the first positioning protrusion is arranged on the seat body, and the other of the first positioning groove and the first positioning protrusion is arranged on the first end of the flap; when the first positioning protrusion is inserted into the first positioning groove, the driving gear is in a transmission state; when the first positioning protrusion is disengaged from the first positioning groove, the driving gear is in a separation state.

[0011] Furthermore, a second positioning structure is arranged between the seat body and the second end of the flap, the second positioning structure comprising a second positioning groove and a second positioning protrusion which can be inserted into the second positioning groove, one of the second positioning groove and the second positioning protrusion is arranged on the seat body, and the other of the second positioning groove and the second positioning protrusion is arranged on the second end of the flap; when the second positioning protrusion is inserted into the second positioning groove, the driving gear is in a transmission state; when the second positioning protrusion is disengaged from the second positioning groove, the driving gear is in a separation state.

[0012] Furthermore, the grounding measuring tool also includes a spiral blade arranged at the bottom end of the insertion rod. The insertion rod rotates and drives the spiral blade to rotate, so that the insertion rod can be rotated in or out of the ground.

[0013] Furthermore, the driving member also includes a rotating rod and a holding rod, the first end of the rotating rod is fixedly connected to the gear shaft of the driving gear, the second end of the rotating rod is hinged to the holding rod, and the holding rod moves to drive the driving gear to rotate through the rotating rod.

[0014] Furthermore, the insertion rod is provided with a guide groove extending along the axial direction thereof, the guide groove passes through the top end of the insertion rod, and the seat body and / or the transmission gear is provided with a guide protrusion capable of guiding and cooperating with the guide groove.

[0015] Furthermore, the grounding measuring tool also includes a connecting sleeve and a clamping block rotatably arranged in the connecting sleeve, the connecting sleeve can be sleeved on the outside of the top end of the insertion rod and cooperate with the thread of the insertion rod; when the connecting sleeve is sleeved on the outside of the top end of the insertion rod, the clamping block is inserted into the guide groove at the top end of the insertion rod; an accommodating groove is provided on the connecting sleeve, and a rotating block is provided on the clamping block, the rotating block is rotatably arranged in the accommodating groove, and the rotating block is locked with the side wall of the accommodating groove; the length of the connecting sleeve along the axial direction of the insertion rod is smaller than the length of the clamping block along the axial direction of the insertion rod.

[0016] By applying the technical solution of the present invention, the grounding measuring tool comprises: a seat, a transmission gear, a plug rod, a driving member and a detector. The transmission gear is rotatably arranged on the seat. The plug rod is inserted into the transmission gear and is locked with the transmission gear, and the plug rod can move up and down relative to the transmission gear. The driving member comprises a driving gear, which can mesh with the transmission gear to drive the transmission gear to rotate, and the transmission gear rotates to drive the plug rod to rotate and move up and down. The detector is electrically connected to the plug rod. In this way, the seat is placed on the ground, and the transmission gear can be driven to rotate by driving the driving gear to rotate, so that the plug rod can move up and down, so that the plug rod can be inserted into the soil, and the detector can measure the grounding resistance of the plug rod. By setting the driving gear, the transmission gear and the plug rod, the operator can manually drive the driving gear to rotate so as to insert the plug rod into the soil. Its structure is simple, avoiding the use of hydraulic cylinders, driving motors and power supplies, and its volume and weight are small, easy to carry, and suitable for field operation needs. Therefore, the technical solution of the present application effectively solves the problem that the grounding measuring tool in the related art is large in volume and weight and inconvenient to carry. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0018] Figure 1 A schematic diagram of the three-dimensional structure of an embodiment of a grounding measurement tool according to the present invention is shown;

[0019] Figure 2 Shows Figure 1 A partial enlarged view of point A of the grounding measuring tool;

[0020] Figure 3 Shows Figure 1 A schematic diagram of the three-dimensional structure of the grounding measuring tool from another perspective;

[0021] Figure 4 Shows Figure 1 A schematic diagram of the three-dimensional structure of a driving gear of a grounding measuring tool;

[0022] Figure 5 Shows Figure 1 A three-dimensional schematic diagram of a cross-section of a connection sleeve and a clamping block of a grounding measuring tool;

[0023] Figure 6 Shows Figure 1 Schematic cross-sectional view of the connection sleeve and clamp block of the grounding measuring tool.

[0024] The above drawings include the following reference numerals:

[0025] 2. crossbeam; 3. transmission gear; 4. seat body; 5. insertion rod; 6. spiral blade; 7. second positioning groove; 8. driving gear; 9. rotating rod; 10. holding rod; 11. first positioning groove; 121. connecting sleeve; 122. clamping block; 123. rotating block; 124. accommodating groove; 13. sliding groove; 14. rotating ring; 15. guide groove; 82. sliding block; 83. first positioning protrusion; 84. flap; 86. second positioning protrusion. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0028] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the present invention. Meanwhile, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be considered as a part of the specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0029] In this embodiment, if Figures 1 to 3 As shown, the grounding measuring tool includes: a seat, a transmission gear 3, a plug rod 5, a driving member and a detector. The transmission gear 3 is rotatably arranged on the seat. The plug rod 5 is inserted into the transmission gear 3 and is locked with the transmission gear 3. The plug rod 5 can move up and down relative to the transmission gear 3. The driving member includes a driving gear 8, which can mesh with the transmission gear 3 to drive the transmission gear 3 to rotate, and the transmission gear 3 rotates to drive the plug rod 5 to rotate and move up and down. The detector is electrically connected to the plug rod 5.

[0030] In this way, the seat is placed on the ground, and by driving the driving gear 8 to rotate, the transmission gear 3 can be driven to rotate, so that the insertion rod 5 can be moved up and down, so that the insertion rod 5 can be inserted into the soil, and the detector can measure the grounding resistance of the insertion rod 5. Through the arrangement of the driving gear 8, the transmission gear 3 and the insertion rod 5, the operator can manually drive the driving gear 8 to rotate to insert the insertion rod 5 into the soil. It has a simple structure, avoids the use of hydraulic cylinders, driving motors and power supplies, is small in size and weight, is easy to carry, and is suitable for field operation needs. Therefore, the technical solution of this embodiment effectively solves the problem that the grounding measurement tool in the related art is large in size and weight and is not easy to carry.

[0031] like Figures 1 to 6As shown, the transmission gear 3 is provided with a first through hole, and the plug rod 5 is inserted into the first through hole and cooperates with the first through hole to stop rotation. In this way, when the transmission gear 3 rotates, it can drive the plug rod 5 to rotate synchronously, so that the plug rod 5 can move up and down. The seat body includes a seat body 4 and a crossbeam 2 arranged above the seat body 4, and the transmission gear 3 is located between the seat body 4 and the crossbeam 2. The arrangement of the crossbeam 2 facilitates the rotatable installation of the transmission gear 3 on the seat body. The grounding measurement tool also includes a rotating ring 14 rotatably arranged on the crossbeam 2, and the rotating ring 14 is provided with a second through hole. The plug rod 5 is inserted into the second through hole and cooperates with the second through hole to stop rotation, and the plug rod 5 can move up and down relative to the rotating ring 14. In this way, when the transmission gear 3 drives the plug rod 5 to rotate, the plug rod 5 can drive the rotating ring 14 to rotate on the crossbeam 2, and the plug rod 5 can move up and down relative to the rotating ring 14 and the crossbeam 2. The arrangement of the rotating ring 14 facilitates the plug rod 5 to be able to move up and down while rotating, further improving the convenience of inserting or pulling out the plug rod 5 from the ground.

[0032] In other embodiments, the transmission gear 3 is provided with a first through hole, and the insertion rod 5 is inserted into the first through hole and is locked with the first through hole. Alternatively, the seat body includes a seat body 4 and a crossbeam 2 arranged above the seat body 4, the transmission gear 3 is located between the seat body 4 and the crossbeam 2, and the grounding measurement tool also includes a rotating ring 14 rotatably arranged on the crossbeam 2, the rotating ring 14 is provided with a second through hole, the insertion rod 5 is inserted into the second through hole and is locked with the second through hole, and the insertion rod 5 can move up and down relative to the rotating ring 14.

[0033] like Figures 1 to 6 As shown, there are multiple transmission gears 3 and multiple insertion rods 5, and multiple transmission gears 3 and multiple insertion rods 5 are arranged one by one. Multiple insertion rods 5 are arranged at equal intervals, and the driving gear 8 is movably arranged on the seat body. The driving gear 8 can selectively mesh with one of the multiple transmission gears 3. By setting multiple insertion rods 5 and transmission gears 3, ground resistance measurement can be performed on multiple points at the same time, which improves the measurement efficiency and is suitable for occasions where ground resistance measurement of multiple points is required. In addition, multiple insertion rods 5 are arranged at equal intervals, which avoids the situation where operators manually measure and position multiple insertion rods 5 on the soil surface, making the arrangement of the insertion rods 5 more uniform and improving the accuracy of measurement.

[0034] like Figures 1 to 6As shown, a slide groove 13 is provided on the seat body, and the driving member also includes a slider 82 and a flap 84 hinged to the slider 82. The slider 82 is slidably arranged in the slide groove 13, and the driving gear 8 is rotatably arranged on the flap 84. The flap 84 swings relative to the slider 82, so that the driving gear 8 has a transmission state of meshing with the transmission gear 3 and a separation state of separating from the transmission gear 3. The setting of the slider 82 and the slide groove 13 facilitates the movement of the driving gear 8 among the multiple transmission gears 3. The setting of the flap 84 facilitates the engagement or separation of the driving gear 8 with the transmission gear 3, and the operation is simple, which improves the convenience of the tool and the flexibility and convenience of the operation.

[0035] like Figures 1 to 6 As shown, a first positioning structure is provided between the seat body and the first end of the flap 84. The first positioning structure includes a first positioning groove 11 and a first positioning protrusion 83 that can be inserted into the first positioning groove 11. The first positioning groove 11 is provided on the seat body, and the first positioning protrusion 83 is provided on the first end of the flap 84. When the first positioning protrusion 83 is inserted into the first positioning groove 11, the drive gear 8 is in a transmission state. When the first positioning protrusion 83 is disengaged from the first positioning groove 11, the drive gear 8 is in a separation state. The first positioning structure has a simple structure and is easy to process. The flap 84 can be reliably positioned on the seat body, so that the drive gear 8 can better maintain meshing with the transmission gear 3, making the transmission more stable and reliable. By providing the first positioning structure, the accurate meshing of the drive gear 8 and the transmission gear 3 can be ensured, the accuracy of the measurement is improved, and the measurement errors caused by equipment errors are reduced.

[0036] In other embodiments, the first positioning protrusion 83 is disposed on the seat body, and the first positioning groove 11 is disposed on the first end of the flap 84 .

[0037] like Figures 1 to 6 As shown, a second positioning structure is provided between the seat body and the second end of the flap 84, and the second positioning structure includes a second positioning groove 7 and a second positioning protrusion 86 that can be inserted into the second positioning groove 7. The second positioning groove 7 is provided on the seat body, and the second positioning protrusion 86 is provided on the second end of the flap 84. When the second positioning protrusion 86 is inserted into the second positioning groove 7, the driving gear 8 is in a transmission state; when the second positioning protrusion 86 is disengaged from the second positioning groove 7, the driving gear 8 is in a separation state. The second positioning structure has a simple structure and is easy to process. It can reliably position the flap 84 on the seat body, so that the driving gear 8 can better maintain the meshing with the transmission gear 3, making the transmission more stable and reliable. By providing the second positioning structure, the accurate meshing of the driving gear 8 and the transmission gear 3 can be ensured, the accuracy of the measurement is improved, and the measurement errors caused by the equipment errors are reduced.

[0038] In other embodiments, the second positioning protrusion 86 is disposed on the seat body, and the second positioning groove 7 is disposed on the second end of the flap 84 .

[0039] like Figures 1 to 6 As shown, the grounding measuring tool also includes a spiral blade 6 arranged at the bottom end of the plug rod 5. The plug rod 5 rotates and drives the spiral blade 6 to rotate, so that the plug rod 5 can be screwed in or out of the ground. The design of the spiral blade 6 enables the plug rod 5 to be screwed in or out of the ground like a screw, reducing the resistance when the plug rod 5 is inserted into or pulled out of the ground, and improving the operation efficiency. This design can significantly improve the efficiency and success rate of the operation and reduce the consumption of manpower and time.

[0040] like Figures 1 to 6 As shown, the driving member further includes a rotating rod 9 and a holding rod 10. The first end of the rotating rod 9 is fixedly connected to the gear shaft of the driving gear 8, and the second end of the rotating rod 9 is hinged to the holding rod 10. The holding rod 10 moves to drive the driving gear 8 to rotate through the rotating rod 9. In this way, the operator can hold and drive the holding rod 10 to move, drive the first end of the rotating rod 9 to rotate around the axis of the driving gear 8, and thus drive the driving gear 8 to rotate. Such a design allows the operator to drive the driving gear 8 to rotate by rotating the holding rod 10, which is simple to operate, improves the convenience of using the tool, and is suitable for occasions requiring manual operation.

[0041] like Figures 1 to 6 As shown, the plunger 5 is provided with a guide groove 15 extending along the axial direction thereof, and the guide groove 15 passes through the top end of the plunger 5. The seat body and the transmission gear 3 are provided with guide protrusions that can cooperate with the guide groove 15. The provision of the guide groove 15 and the guide protrusion can ensure the stability of the plunger 5 when it moves up and down, prevent the plunger 5 from deflecting during the rotation process, and improve the accuracy of the measurement. The guide groove 15 passes through the top end of the plunger 5, which facilitates the assembly and disassembly of the seat body and the transmission gear 3 with the plunger 5. After disassembly, the occupied volume is further reduced, which is convenient for carrying.

[0042] In other embodiments, the insertion rod 5 is provided with a guide groove 15 extending along its axial direction, the guide groove 15 passes through the top end of the insertion rod 5, and the seat body or the transmission gear 3 is provided with a guide protrusion that can cooperate with the guide groove 15.

[0043] like Figures 1 to 6As shown, the grounding measuring tool also includes a connecting sleeve 121 and a clamping block 122 rotatably arranged in the connecting sleeve 121. The connecting sleeve 121 can be sleeved outside the top end of the plug rod 5 and threadedly matched with the plug rod 5. In this way, the connecting sleeve 121 can be fixed and blocked on the top end of the plug rod 5, so that the plug rod 5 can maintain connection with the seat body and the transmission gear 3. When the connecting sleeve 121 is sleeved outside the top end of the plug rod 5, the clamping block 122 is inserted into the guide groove 15 at the top end of the plug rod 5. The setting of the clamping block 122 can reduce the deformation of the guide groove 15 at the top end of the plug rod 5, making the movement of the plug rod 5 more stable and smooth, and avoiding the problem that the plug rod 5 cannot move due to the deformation of the guide groove 15 at the top end of the plug rod 5.

[0044] The connecting sleeve 121 is provided with a receiving groove 124, and the clamping block 122 is provided with a rotating block 123. The rotating block 123 is rotatably arranged in the receiving groove 124, and the rotating block 123 is locked with the side wall of the receiving groove 124. The rotating block 123 and the receiving groove 124 have simple structures, so that the clamping block 122 can be rotatably arranged in the receiving groove 124, so that after the clamping block 122 is inserted into the guide groove 15 at the top end of the insertion rod 5, the connecting sleeve 121 can continue to rotate to be fixedly connected with the top end of the insertion rod 5.

[0045] The length of the connecting sleeve 121 along the axial direction of the insertion rod 5 is smaller than the length of the block 122 along the axial direction of the insertion rod 5, so that the operator can better observe the connection between the block 122 and the receiving groove 124 from the outside of the connecting sleeve 121, which facilitates operation and improves assembly efficiency.

[0046] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the devices or elements referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention. The directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0047] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0048] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0049] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A grounding measurement tool, characterized in that: include: seat body; A transmission gear (3) rotatably arranged on the seat body; An insertion rod (5) is inserted into the transmission gear (3) and is engaged with the transmission gear (3) to prevent rotation. The insertion rod (5) can move up and down relative to the transmission gear (3); A driving member, comprising a driving gear (8), wherein the driving gear (8) is capable of meshing with the transmission gear (3) to drive the transmission gear (3) to rotate, and the rotation of the transmission gear (3) drives the insertion rod (5) to rotate and move up and down; A detector is electrically connected to the insertion rod (5).

2. The grounding measuring tool according to claim 1, characterized in that: The transmission gear (3) is provided with a first through hole, and the insertion rod (5) is inserted into the first through hole and is locked with the first through hole; and / or, The seat body comprises a seat body (4) and a cross beam (2) arranged above the seat body (4); the transmission gear (3) is located between the seat body (4) and the cross beam (2); the grounding measurement tool also comprises a rotating ring (14) rotatably arranged on the cross beam (2); a second through hole is arranged on the rotating ring (14); the insertion rod (5) is inserted into the second through hole and engaged with the second through hole to prevent rotation; the insertion rod (5) can move up and down relative to the rotating ring (14).

3. The grounding measuring tool according to claim 1, characterized in that: There are a plurality of transmission gears (3) and a plurality of insertion rods (5), and the plurality of transmission gears (3) and the plurality of insertion rods (5) are arranged one by one, and the plurality of insertion rods (5) are arranged at equal intervals. The driving gear (8) is movably arranged on the seat body, and the driving gear (8) can selectively mesh with one of the plurality of transmission gears (3).

4. The grounding measuring tool according to claim 3, characterized in that: The seat body is provided with a slide groove (13), the driving member further comprises a slider (82) and a flap (84) hinged to the slider (82), the slider (82) is slidably arranged in the slide groove (13), and the driving gear (8) is rotatably arranged on the flap (84); The flap (84) swings relative to the slider (82) so that the driving gear (8) has a transmission state in which it is meshed with the transmission gear (3) and a separation state in which it is separated from the transmission gear (3).

5. The grounding measuring tool according to claim 4, characterized in that: A first positioning structure is provided between the seat body and the first end of the flap (84), the first positioning structure comprising a first positioning groove (11) and a first positioning protrusion (83) capable of being inserted into the first positioning groove (11), one of the first positioning groove (11) and the first positioning protrusion (83) being provided on the seat body, and the other of the first positioning groove (11) and the first positioning protrusion (83) being provided on the first end of the flap (84); When the first positioning protrusion (83) is inserted into the first positioning groove (11), the driving gear (8) is in the transmission state; when the first positioning protrusion (83) is separated from the first positioning groove (11), the driving gear (8) is in the separation state.

6. The grounding measuring tool according to claim 4, characterized in that: A second positioning structure is provided between the seat body and the second end of the flap (84), the second positioning structure comprising a second positioning groove (7) and a second positioning protrusion (86) capable of being inserted into the second positioning groove (7), one of the second positioning groove (7) and the second positioning protrusion (86) being provided on the seat body, and the other of the second positioning groove (7) and the second positioning protrusion (86) being provided on the second end of the flap (84); When the second positioning protrusion (86) is inserted into the second positioning groove (7), the driving gear (8) is in the transmission state; when the second positioning protrusion (86) is separated from the second positioning groove (7), the driving gear (8) is in the separation state.

7. The grounding measuring tool according to claim 1, characterized in that: The grounding measuring tool further comprises a spiral blade (6) arranged at the bottom end of the insertion rod (5); the insertion rod (5) rotates and drives the spiral blade (6) to rotate, so that the insertion rod (5) can be rotated in or out of the ground.

8. The grounding measuring tool according to claim 1, characterized in that: The driving member also includes a rotating rod (9) and a holding rod (10), wherein the first end of the rotating rod (9) is fixedly connected to the gear shaft of the driving gear (8), and the second end of the rotating rod (9) is hinged to the holding rod (10), and the holding rod (10) moves to drive the driving gear (8) to rotate through the rotating rod (9).

9. The grounding measuring tool according to claim 1, characterized in that: The insertion rod (5) is provided with a guide groove (15) extending along its axial direction, the guide groove (15) passes through the top end of the insertion rod (5), and the seat body and / or the transmission gear (3) are provided with a guide protrusion capable of guiding and cooperating with the guide groove (15).

10. The grounding measuring tool according to claim 9, characterized in that: The grounding measuring tool further comprises a connecting sleeve (121) and a clamping block (122) rotatably arranged in the connecting sleeve (121); the connecting sleeve (121) can be sleeved outside the top end of the insertion rod (5) and threadedly matched with the insertion rod (5); when the connecting sleeve (121) is sleeved outside the top end of the insertion rod (5), the clamping block (122) is inserted into the guide groove (15) at the top end of the insertion rod (5); The connecting sleeve (121) is provided with a receiving groove (124), the clamping block (122) is provided with a rotating block (123), the rotating block (123) is rotatably arranged in the receiving groove (124), and the rotating block (123) is locked with a side wall of the receiving groove (124); The length of the connecting sleeve (121) along the axial direction of the insertion rod (5) is shorter than the length of the clamping block (122) along the axial direction of the insertion rod (5).

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