CN219696813U - Motor anti-drop coupling assembling and earthing device - Google Patents

Abstract

The utility model discloses an anti-falling connecting assembly and a grounding device of a motor, which relate to the technical field of electrical equipment and comprise a motor main body, a metal shell and a supporting base arranged at the bottom of the metal shell, wherein the anti-falling connecting mechanism comprises a conductive bin and a limiting groove formed in the middle of one side of the conductive bin, a wiring plate is arranged in the limiting groove, one end of the wiring plate is also connected with a fixing part, the anti-falling connecting assembly is novel in structural design, in the using process, a grounding wire can be connected and fixed at the outer side of the metal shell through the wiring plate and the fixing part, the traditional connecting mode mainly comprising welding and winding can be replaced, and the anti-falling connecting mechanism also has the effects of buffering, adjusting vibration frequency and absorbing energy on the grounding wire connected at the outer side of the metal shell, so that the problem that the grounding wire falls off due to severe shaking when the grounding wire is connected with the metal shell can be solved.

Description

Motor anti-drop coupling assembling and earthing device

Technical Field

The utility model relates to the technical field of electrical equipment, in particular to an anti-falling connecting assembly of a motor and a grounding device.

Background

Currently, in motor grounding devices, the grounding wire of most motors is wound by a wire and a grounding bar, or the wire is welded on the grounding bar by welding. In the running process of the motor, vibration is inevitably generated, and the ground wire is frequently dropped along with the lengthening of the continuous running time.

The existing defects are as follows:

1) Most of motors and the grounding wires are connected in a winding or welding mode, so that the situation that the grounding wires fall off is caused due to long running time;

2) The existing grounding device cannot be used for disassembling, assembling, connecting, maintaining and replacing parts of the grounding device according to the use condition.

Disclosure of Invention

This section is intended to outline some aspects of embodiments of the utility model and to briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section as well as in the description of the utility model and in the title of the utility model, which may not be used to limit the scope of the utility model.

The present utility model has been made in view of the above-mentioned problems or the problems of the prior art that the motor and the ground wire have long running time and the ground wire come off.

It is therefore an object of the present utility model to provide an anti-drop connection assembly.

In order to solve the technical problems, the utility model provides the following technical scheme: an anti-drop connecting component comprises a connecting component body,

the motor main body comprises a metal shell and a support base arranged at the bottom of the metal shell;

the anti-drop connecting mechanism comprises a conductive bin and a limiting groove formed in the middle of one side of the conductive bin, wherein a wiring board is arranged in the limiting groove, and one end of the wiring board is further connected with a fixing part.

Based on the technical characteristics: according to the scheme, the positioning grooves are formed in the two sides of the inner wall of the positioning opening respectively, and the positioning clamping blocks are additionally arranged on the two sides of the conductive inserting block respectively, so that the conductive inserting block can be limited and clamped in the positioning opening due to clamping fit between the positioning clamping blocks and the positioning grooves, and the grounding conducting wires can be clamped and fixed in the conductive inserting block when the conductive inserting block is inserted in the positioning opening due to the fact that the metal toothed plates are additionally arranged on the inner sides of the two groups of the positioning clamping blocks respectively and are in meshed connection, and the grounding conducting wires which are inserted in the threading opening can be electrically connected with the metal shell of the motor body due to the fact that the conductive bin, the limiting grooves, the wiring plate and the fixing parts in the scheme are made of conductive metal materials;

when the conductive plug block is inserted into the positioning opening, the two groups of positioning clamping blocks can extrude a first compression spring connected with the blocking groove, the first compression spring deforms and generates opposite acting force when being extruded by external force, and the generated reacting force can play a role in outwards pushing the positioning clamping blocks, so that the stability of clamping connection between the positioning clamping blocks and the positioning groove can be effectively improved;

when the motor main body is in violent shaking during operation, the damping rod and the second compression spring structure can play roles in buffering, adjusting vibration frequency and absorbing energy on the grounding wire connected to one end of the wiring board, and the problem that the grounding wire falls off due to violent shaking when the grounding wire is connected with the metal shell can be effectively solved;

according to the anti-drop connecting assembly, the structural design is novel, in the using process, the grounding wire can be connected and fixed on the outer side of the metal shell through the wiring plate and the fixing part, the traditional connecting mode mainly comprising welding and winding can be replaced, the grounding wire connected on the outer side of the metal shell is buffered, vibration frequency is regulated and energy is absorbed through the conductive seat, the damping rod and the second compression spring, and therefore the problem that the grounding wire drops due to severe shaking when the grounding wire is connected with the metal shell can be solved.

As a preferred embodiment of the anti-drop connection assembly of the present utility model, wherein: the locating port has been seted up to the one end of wiring plate, the inner wall both sides of locating port all are provided with the constant head tank.

Based on the technical characteristics: the locating port and the locating slot are formed in one end of the wiring board, and the locating port and the locating slot are used for limiting connection of the fixing part.

As a preferred embodiment of the anti-drop connection assembly of the present utility model, wherein: the fixing part comprises a conductive insertion block, and a threading opening is formed in the middle of one side of the conductive insertion block in a penetrating manner.

Based on the technical characteristics: according to the scheme, the threading opening is formed in the middle of one side of the conductive insertion block in a penetrating mode and is used for inserting and connecting the grounding wire.

As a preferred embodiment of the anti-drop connection assembly of the present utility model, wherein: the two sides of the conductive plug block are provided with blocking grooves, the two groups of blocking grooves are respectively provided with a positioning clamping block, the positioning clamping blocks are matched with the positioning groove in structure, and the positioning clamping blocks are matched with the positioning grooves in a clamping manner.

Based on the technical characteristics: because the locating fixture block is in clamping fit with the locating groove, the conductive plug block can be limited and clamped in the locating opening.

As a preferred embodiment of the anti-drop connection assembly of the present utility model, wherein: two groups of first compression springs are further connected between the positioning clamping blocks and the blocking grooves, metal toothed plates are further respectively mounted on the inner sides of the two groups of positioning clamping blocks, and the two groups of metal toothed plates are in meshed connection.

Based on the technical characteristics: because the metal toothed plates are in meshed connection, when the conductive plug blocks are inserted into the positioning openings, the grounding wires inserted into the threading openings can be clamped and fixed in the conductive plug blocks.

As a preferred embodiment of the anti-drop connection assembly of the present utility model, wherein: damping rods are mounted at two ends of the conductive seat, and second compression springs are sleeved outside the two groups of damping rods.

Based on the technical characteristics: when the motor main body is in violent shaking during operation, the grounding wire connected to one end of the wiring board can be buffered, vibration frequency can be regulated, and energy can be absorbed through the conductive seat, the damping rod and the second compression spring structure.

The anti-falling connecting assembly has the beneficial effects that: the anti-drop coupling assembling's structural design is novel, in the in-process of using, through wiring plate and fixed part, can connect the earth conductor fixed in the outside of metal casing, can replace the tradition to use welding, winding mainly connected mode, through electrically conductive seat, damping pole and second compression spring, still play buffering, adjust vibration frequency and the effect of absorbing energy to the earth conductor of connecting in the metal casing outside to can solve the earth conductor and arouse the problem that the earth conductor drops because of violently rocking when being connected with the metal casing.

In view of the fact that in the actual use process, the existing grounding device also has the problem that the components of the grounding device cannot be assembled, disassembled, connected and maintained and replaced according to the use condition.

In order to solve the technical problems, the utility model also provides the following technical scheme: a motor grounding device comprises an anti-drop connecting component and,

the detachable grounding assembly is positioned at the bottom of one side of the motor main body, and a grounding cable is further connected between the detachable grounding assembly and the motor main body;

the detachable grounding assembly comprises a metal embedded part, a grounding row is arranged at the top of the metal embedded part, and a wiring end cover is further arranged at the top of the grounding row.

Based on the technical characteristics: according to the scheme, the grounding bar can be limited and connected to the top of the embedded part through the limiting clamping grooves respectively formed in the outer sides of the periphery of the subway connecting rod and the limiting clamping strips respectively additionally arranged in the periphery of the inner wall of the connecting rod groove, and the grounding bar can be connected and fixed to the grounding bar which is limited and connected to the top of the metal embedded part and one end of the grounding cable which is wound and connected in the winding groove at the same time through the conductive screw head additionally arranged at the top of the subway connecting rod due to the threaded fit between the conductive screw head and the wiring end cover;

according to the motor grounding device, the structural design is novel, and in the use process, the detachable grounding assembly can be used for disassembling, assembling, connecting, maintaining and replacing the metal embedded part and the grounding bar according to the use condition, and meanwhile, the stability of connection between the grounding bar and the metal embedded part can be effectively improved.

As a preferred embodiment of the motor grounding device of the present utility model, wherein: the top of metal built-in fitting installs the ground connection iron pole, the top of ground connection iron pole still is connected with the conductive screw head, be screw thread fit between conductive screw head and the terminal cover.

Based on the technical characteristics: because the conductive screw head is in threaded fit with the wiring end cover, the connection and fixation of the grounding bar which is limited and connected to the top of the metal embedded part can be realized, and meanwhile, the connection and fixation of one end of the grounding cable which is wound and connected in the winding groove can be realized.

As a preferred embodiment of the motor grounding device of the present utility model, wherein: limiting clamping grooves are formed in the outer sides of the periphery of the grounding iron rod, and winding grooves are formed in the bottom of the conductive screw head.

Based on the technical characteristics: the winding groove is formed in the bottom of the conductive screw head and is used for connecting and fixing the grounding cable.

As a preferred embodiment of the motor grounding device of the present utility model, wherein: the middle part of ground connection row runs through and has offered the connecting rod groove, the inner wall in connecting rod groove still is provided with a plurality of spacing card strips of group all around, spacing card strip and spacing card slot structure phase-match, be joint cooperation between spacing card strip and the spacing card slot.

Based on the technical characteristics: because the limiting clamping strips are matched with the limiting clamping grooves in a clamping way, the grounding bar can be connected to the top of the embedded part in a limiting way.

The motor grounding device has the beneficial effects that: the motor grounding device is novel in structural design, and in the use process, the detachable grounding assembly can be used for carrying out dismounting connection and maintenance replacement on the metal embedded part and the grounding bar according to the use condition, and meanwhile, the connection stability between the grounding bar and the metal embedded part can be effectively improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art. Wherein:

FIG. 1 is a schematic diagram of a motor body and anti-drop connection mechanism installation structure of an anti-drop connection assembly;

FIG. 2 is a schematic view of the overall structure of an anti-drop connection assembly;

FIG. 3 is a schematic view of a junction plate structure of an anti-drop connection assembly;

FIG. 4 is a schematic view of a fixing component structure of an anti-drop connection assembly;

FIG. 5 is a schematic view of a metal toothed plate structure of an anti-drop connection assembly;

FIG. 6 is a schematic diagram showing a connection state of a detachable grounding assembly of a motor grounding device and an anti-drop connection mechanism;

FIG. 7 is a schematic view of a metal embedment part structure of a motor grounding device;

fig. 8 is a schematic view of a grounding rail structure of a motor grounding device.

In the drawings, the list of components represented by the various numbers is as follows:

100. a motor main body; 101. a metal housing; 102. a support base; 200. an anti-drop connection mechanism; 201. a conductive bin; 202. a limit groove; 203. a wiring board member; 203a, a positioning port; 203b, a positioning groove; 203c, a conductive seat; 203d, a damping rod; 203e, a second compression spring; 204. a fixing member; 204a, conductive plugs; 204a-1, a baffle slot; 204a-2, a positioning fixture; 204a-3, a first compression spring; 204a-4, a metal toothed plate; 204b, a threading port; 300. a detachable grounding assembly; 301. a metal embedded part; 301a, a grounding iron rod; 301a-1, a limit clamping groove; 301b, conductive screw heads; 301b-1, a winding groove; 302. a ground row; 302a, a connecting rod groove; 302b, limiting clamping strips; 303. a terminal cover; 400. and (3) grounding cables.

Detailed Description

In order that the above-recited objects, features and advantages of the present utility model will become more readily apparent, a more particular description of the utility model will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model, but the present utility model may be practiced in other ways other than those described herein, and persons skilled in the art will readily appreciate that the present utility model is not limited to the specific embodiments disclosed below.

Further, reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic can be included in at least one implementation of the utility model. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.

Example 1

Referring to fig. 1 to 4, a first embodiment of the present utility model provides an anti-falling connection assembly capable of solving the problem of falling of a ground wire existing in the prior art when a motor and the ground wire are operated for a long time, comprising,

a motor main body 100 including a metal housing 101 and a support base 102 mounted at the bottom of the metal housing 101;

the anti-drop connection mechanism 200 comprises a conductive bin 201 and a limiting groove 202 formed in the middle of one side of the conductive bin 201, wherein a wiring board 203 is arranged in the limiting groove 202, and one end of the wiring board 203 is further connected with a fixing part 204.

Specifically, a positioning opening 203a is formed at one end of the wiring board 203, positioning grooves 203b are formed on two sides of the inner wall of the positioning opening 203a, and the positioning opening 203a and the positioning grooves 203b formed at one end of the wiring board 203 are used for limiting connection of the fixing component 204.

Further, the fixing component 204 includes a conductive insert 204a, and a threading opening 204b is formed in a middle portion of one side of the conductive insert 204a, and is used for inserting and connecting a grounding wire through the threading opening 204b formed in a middle portion of one side of the conductive insert 204 a.

The two sides of the conductive plug 204a are provided with the blocking grooves 204a-1, the positioning clamping blocks 204a-2 are respectively arranged in the two groups of blocking grooves 204a-1, the positioning clamping blocks 204a-2 are matched with the positioning groove 203b in structure, the positioning clamping blocks 204a-2 are matched with the positioning groove 203b in a clamping manner, and the conductive plug 204a can be limited and clamped in the positioning opening 203a due to the clamping and matching between the positioning clamping blocks 204a-2 and the positioning groove 203 b.

In summary, in the scheme, through the positioning grooves 203b respectively formed on two sides of the inner wall of the positioning opening 203a and the positioning clamping blocks 204a-2 respectively additionally arranged on two sides of the conductive insertion block 204a, the conductive insertion block 204a can be limited and clamped in the positioning opening 203a due to the clamping fit between the positioning clamping blocks 204a-2 and the positioning grooves 203b, and the metal toothed plates 204a-4 respectively additionally arranged on the inner sides of the two groups of the positioning clamping blocks 204a-2 are meshed and connected, so that when the conductive insertion block 204a is inserted in the positioning opening 203a, the grounding wire inserted in the threading opening 204b can be clamped and fixed in the conductive insertion block 204a, and the grounding wire can be electrically connected with the metal casing 101 of the motor main body 100 due to the conductive metal materials adopted by the conductive bin 201, the limiting grooves 202, the wiring plate 203 and the fixing parts 204 in the scheme, so that the grounding wire can play a role in grounding wire connection with the metal casing 101 of the motor main body 100.

Example 2

Referring to fig. 4 to 5, in a second embodiment of the present utility model, unlike the previous embodiment, the embodiment provides an anti-falling connection assembly capable of solving the problem of falling of a ground wire existing in the prior art when a motor and the ground wire are operated for a long time, which includes,

two groups of first compression springs 204a-3 are further connected between the positioning clamping blocks 204a-2 and the baffle grooves 204a-1, metal toothed plates 204a-4 are further respectively installed on the inner sides of the two groups of positioning clamping blocks 204a-2, and the two groups of metal toothed plates 204a-4 are in meshed connection.

Specifically, because the metal toothed plates 204a-4 are in meshed connection, when the conductive plug 204a is inserted into the positioning opening 203a, the grounding wire inserted into the threading opening 204b can be clamped and fixed inside the conductive plug 204 a.

Further, the two ends of the conductive seat 203c are respectively provided with a damping rod 203d, and the outer parts of the two groups of damping rods 203d are also sleeved with a second compression spring 203e.

Preferably, when a strong shaking occurs while the motor main body 100 is operated, the ground wire connected to one end of the terminal plate 203 is buffered, the vibration frequency is adjusted, and the energy is absorbed by the structure of the conductive base 203c, the damping rod 203d, and the second compression spring 203e.

In summary, when the conductive plug 204a is inserted into the positioning opening 203a, the two sets of positioning clamping blocks 204a-2 can squeeze the first compression spring 204a-3 connected with the blocking groove 204a-1, the first compression spring 204a-3 deforms and generates opposite acting force when being squeezed by external force, and the generated reacting force can play a role of pushing the positioning clamping block 204a-2 outwards, so that the stability of the clamping connection between the positioning clamping block 204a-2 and the positioning groove 203b can be effectively improved.

Example 3

Referring to fig. 6 to 8, in a third embodiment of the present utility model, unlike the previous embodiment, this embodiment provides a motor grounding device, solving the problem that the existing grounding device cannot be disassembled and assembled and repaired and replaced according to the use condition, comprising,

the detachable grounding assembly 300, the detachable grounding assembly 300 is positioned at the bottom of one side of the motor main body 100, and a grounding cable 400 is also connected between the detachable grounding assembly 300 and the motor main body 100;

the detachable grounding assembly 300 comprises a metal embedded part 301, a grounding row 302 is arranged at the top of the metal embedded part 301, and a wiring end cover 303 is further arranged at the top of the grounding row 302.

Specifically, the top of the metal embedded part 301 is provided with the subway connecting rod 301a, the top of the subway connecting rod 301a is also connected with the conductive screw head 301b, the conductive screw head 301b is in threaded fit with the wiring end cover 303, and the conductive screw head 301b is in threaded fit with the wiring end cover 303, so that the grounding bar 302 which is limited and connected to the top of the metal embedded part 301 can be connected and fixed, and meanwhile, the grounding cable 400 which is wound and connected to the inside of the winding groove 301b-1 can be connected and fixed at one end.

Further, the outer sides of the periphery of the subway connecting rod 301a are provided with limit clamping grooves 301a-1, the bottom of the conductive screw head 301b is provided with winding grooves 301b-1, and the winding grooves 301b-1 formed in the bottom of the conductive screw head 301b are used for connecting and fixing the grounding cable 400.

Preferably, the middle part of the grounding bar 302 is provided with a connecting bar groove 302a in a penetrating manner, a plurality of groups of limiting clamping strips 302b are further arranged around the inner wall of the connecting bar groove 302a, the limiting clamping strips 302b are matched with the limiting clamping grooves 301a-1 in structure, the limiting clamping strips 302b are matched with the limiting clamping grooves 301a-1 in a clamping manner, and the grounding bar 302 can be connected to the top of the embedded part 301 in a limiting manner due to the fact that the limiting clamping strips 302b are matched with the limiting clamping grooves 301a-1 in a clamping manner.

In summary, according to the scheme, through the limiting clamping grooves 301a-1 formed in the outer sides of the periphery of the subway connecting rod 301a and the groups of limiting clamping strips 302b formed in the periphery of the inner wall of the connecting rod groove 302a, the grounding bar 302 can be connected to the top of the embedded part 301 in a limiting mode, and the conductive screw 301b formed in the top of the subway connecting rod 301a is in threaded fit with the wiring end cover 303, so that the grounding bar 302 which is connected to the top of the metal embedded part 301 in a limiting mode can be connected and fixed, and meanwhile, one end of the grounding cable 400 which is wound and connected to the inside of the winding groove 301b-1 can be connected and fixed.

It is important to note that the construction and arrangement of the utility model as shown in the various exemplary embodiments is illustrative only. Although only a few embodiments have been described in detail in this disclosure, those skilled in the art who review this disclosure will readily appreciate that many modifications are possible (e.g., variations in sizes, dimensions, structures, shapes and proportions of the various elements, values of parameters (e.g., temperature, pressure, etc.), mounting arrangements, use of materials, colors, orientations, etc.) without materially departing from the novel teachings and advantages of the subject matter described in this application. For example, elements shown as integrally formed may be constructed of multiple parts or elements, the position of elements may be reversed or otherwise varied, and the nature or number of discrete elements or positions may be altered or varied. Accordingly, all such modifications are intended to be included within the scope of present utility model. The order or sequence of any process or method steps may be varied or re-sequenced according to alternative embodiments. In the claims, any means-plus-function clause is intended to cover the structures described herein as performing the recited function and not only structural equivalents but also equivalent structures. Other substitutions, modifications, changes and omissions may be made in the design, operating conditions and arrangement of the exemplary embodiments without departing from the scope of the present utility models. Therefore, the utility model is not limited to the specific embodiments, but extends to various modifications that nevertheless fall within the scope of the appended claims.

Furthermore, in order to provide a concise description of the exemplary embodiments, all features of an actual implementation may not be described (i.e., those not associated with the best mode presently contemplated for carrying out the utility model, or those not associated with practicing the utility model).

It should be appreciated that in the development of any such actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort might be complex and time consuming, but would nevertheless be a routine undertaking of design, fabrication, and manufacture for those of ordinary skill having the benefit of this disclosure.

It should be noted that the above embodiments are only for illustrating the technical solution of the present utility model and not for limiting the same, and although the present utility model has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solution of the present utility model may be modified or substituted without departing from the spirit and scope of the technical solution of the present utility model, which is intended to be covered in the scope of the claims of the present utility model.

Claims (10)

1. An anti-drop coupling assembling, its characterized in that: comprising the steps of (a) a step of,

a motor main body (100) including a metal housing (101) and a support base (102) mounted on the bottom of the metal housing (101);

the anti-drop connecting mechanism (200) comprises a conductive bin (201) and a limiting groove (202) formed in the middle of one side of the conductive bin (201), wherein a wiring board (203) is arranged in the limiting groove (202), and one end of the wiring board (203) is further connected with a fixing part (204).

2. The anti-drop connection assembly of claim 1, wherein: one end of the wiring board (203) is provided with a positioning opening (203 a), and both sides of the inner wall of the positioning opening (203 a) are provided with positioning grooves (203 b).

3. An anti-drop connection assembly as claimed in claim 1 or 2, wherein: the fixing component (204) comprises a conductive insert block (204 a), and a threading opening (204 b) is formed in the middle of one side of the conductive insert block (204 a) in a penetrating mode.

4. A drop-out prevention connection assembly as claimed in claim 3, wherein: the two sides of the conductive plug block (204 a) are provided with blocking grooves (204 a-1), positioning clamping blocks (204 a-2) are arranged in the two groups of blocking grooves (204 a-1), the positioning clamping blocks (204 a-2) are matched with the positioning grooves (203 b) in structure, and the positioning clamping blocks (204 a-2) are matched with the positioning grooves (203 b) in a clamping mode.

5. The drop-out prevention connection assembly of claim 4, wherein: two groups of first compression springs (204 a-3) are further connected between the positioning clamping blocks (204 a-2) and the blocking grooves (204 a-1), metal toothed plates (204 a-4) are further respectively installed on the inner sides of the two groups of positioning clamping blocks (204 a-2), and the two groups of metal toothed plates (204 a-4) are in meshed connection.

6. The drop-out prevention connection assembly of claim 5, wherein: the wiring board (203) comprises a conductive seat (203 c), damping rods (203 d) are mounted at two ends of the conductive seat (203 c), and second compression springs (203 e) are sleeved outside the two groups of damping rods (203 d).

7. A motor grounding device, characterized in that: comprising an anti-drop connection assembly according to any one of claims 1, 2, 4, 5, 6, and,

the detachable grounding assembly (300) is positioned at the bottom of one side of the motor main body (100), and a grounding cable (400) is further connected between the detachable grounding assembly (300) and the motor main body (100);

the detachable grounding assembly (300) comprises a metal embedded part (301), a grounding row (302) is arranged at the top of the metal embedded part (301), and a wiring end cover (303) is further arranged at the top of the grounding row (302).

8. The motor grounding device as defined in claim 7, wherein: the top of metal built-in fitting (301) is installed ground connection iron rod (301 a), the top of ground connection iron rod (301 a) still is connected with electrically conductive screw head (301 b), be screw thread fit between electrically conductive screw head (301 b) and terminal cover (303).

9. The motor grounding device as defined in claim 8, wherein: limiting clamping grooves (301 a-1) are formed in the outer sides of the periphery of the grounding iron rod (301 a), and winding grooves (301 b-1) are formed in the bottom of the conductive screw head (301 b).

10. The motor grounding device as defined in claim 9, wherein: the middle part of ground connection row (302) runs through and has seted up connecting rod groove (302 a), still be provided with a plurality of spacing card strip (302 b) of group around the inner wall of connecting rod groove (302 a), spacing card strip (302 b) and spacing draw-in groove (301 a-1) structure phase-match, be joint cooperation between spacing card strip (302 b) and spacing draw-in groove (301 a-1).