CN215278239U - Auxiliary device for screw fixation - Google Patents

Abstract

The application relates to the technical field of assembling tools and discloses an auxiliary device for fixing a screw, which comprises a loop bar, wherein the loop bar is provided with a hollow inner cavity and is filled with a protective agent capable of forming a protective layer on the surface of the screw; wherein the protective agent flows to the screw side via the flow channel when the sleeve rod rotates. This application drives the loop bar synchronous rotation so that the screw in treats when the mounting at screw in instrument, and the protective agent flows to the screw side from the cavity inner chamber via the runner to distribute in the screw head surface, form new protective coating, thereby protect the screw effectively. Thus, the corrosion resistance and the safety in the using process of the screw are improved.

Description

Auxiliary device for screw fixation

Technical Field

The present application relates to the field of assembly tool technology, for example to an auxiliary device for screw fixation.

Background

The shell of the air conditioner outdoor unit on the market is made of metal materials for powder spraying and paint spraying treatment, all appearance parts are fixed together by screws, the screws are fixed by matching torque guns with sleeve devices, and when the screws are fixed, the surfaces of screw heads are extruded by the torque guns, so that an anticorrosive coating is easily damaged. Because the outdoor unit of the air conditioner is installed outdoors and often contacts with sunlight, rainwater, dust and the like, particularly, when the outdoor unit of the air conditioner is used in high salt damage areas such as offshore areas, screws are easy to rust, the fixing effect of the screws is influenced, once the fixing force of the screws is not controlled in place, a powder spraying layer and a paint spraying coating of a metal piece are easy to scratch, powder and a paint film break, so that metal plates are exposed, and the metal plates lose an anti-corrosion protection layer, so that the metal plate piece is finally rusted due to erosion of rainwater in the atmosphere, the screws are difficult to detach, the strength is reduced, the screw breaks and fails, and the safety, the appearance fineness and the experience of users of the outdoor unit of the air conditioner are seriously influenced.

SUMMERY OF THE UTILITY MODEL

The following presents a simplified summary in order to provide a basic understanding of some aspects of the disclosed embodiments. This summary is not an extensive overview nor is intended to identify key/critical elements or to delineate the scope of such embodiments but rather as a prelude to the more detailed description that is presented later.

The embodiment of the disclosure provides an auxiliary device for screw fixation, so as to reduce the problem that a protective layer on the surface of a screw head is easy to damage in the process of fixing a screw.

In some embodiments, the auxiliary device for screw fixation includes a loop bar, the loop bar has a hollow inner cavity and is filled with a protective agent capable of forming a protective layer on the surface of the screw, the front end of the loop bar is used for installing a screw head, the front end of the loop bar is provided with a flow channel communicated with the hollow inner cavity, the rear end of the loop bar can be connected with the rotating end of the screw screwing tool and can enable the loop bar to rotate synchronously with the rotating end; wherein the protective agent flows to the screw side via the flow channel when the sleeve rod rotates.

In some embodiments, the front end of the loop bar is provided with a mounting groove detachably connected with the screw head, and the flow channel is arranged on the bottom wall of the mounting groove so as to at least communicate the inner cavity and the mounting groove.

In some embodiments, the flow path comprises: the micro-groove flow channel is arranged on the bottom wall of the mounting groove; and/or the drainage channel is formed by extending along the side wall of the mounting groove, and the drainage channel is constructed in a semicircular opening type structure.

In some embodiments, the auxiliary device for screw fixation further includes: and the adsorption layer is arranged in the inner cavity, covers the flow channel, is used for absorbing the protective agent, and can be extruded when the loop bar rotates to transfer the protective agent to the flow channel.

In some embodiments, the adsorbent layer is a layer of porous material.

In some embodiments, the auxiliary device for screw fixation further includes: the stirring piece is arranged in the inner cavity and used for stirring the protective agent.

In some embodiments, the stirring member is a spherical structure, and a plurality of grooves are arranged on the spherical surface at intervals.

In some embodiments, the auxiliary device for screw fixation further includes: the injection hole penetrates from the outer wall of the sleeve rod to the inner cavity for molding and is used for supplementing a protective agent to the inner cavity; the sealing piece is detachably arranged on the injection hole and used for plugging the injection hole.

In some embodiments, the rear end of the stem is configured as a polygonal rod-like structure, and the rotating end of the screw-in tool mates with the rod-like structure.

In some embodiments, the stem includes a front section and a rear section, the front and rear sections being threadably connected.

The auxiliary device for screw fixation provided by the embodiment of the disclosure can realize the following technical effects:

when the screw screwing tool drives the loop bar to synchronously rotate so that the screw is screwed into the to-be-fixed part, the protective agent flows to the screw side from the hollow inner cavity through the flow channel and is distributed on the surface of the screw head to form a new protective coating, so that the screw is effectively protected, and the corrosion resistance and the safety in the using process of the screw are improved.

The foregoing general description and the following description are exemplary and explanatory only and are not restrictive of the application.

Drawings

One or more embodiments are illustrated by way of example in the accompanying drawings, which correspond to the accompanying drawings and not in limitation thereof, in which elements having the same reference numeral designations are shown as like elements and not in limitation thereof, and wherein:

FIG. 1 is a schematic structural diagram of an auxiliary device for screw fixation provided by an embodiment of the present disclosure;

FIG. 2 is an exploded view of an auxiliary device for screw fixation provided by embodiments of the present disclosure;

FIG. 3 is a schematic cross-sectional view of an auxiliary device for screw fixation provided by an embodiment of the present disclosure;

FIG. 4 is an enlarged partial schematic view of an auxiliary device for screw fixation provided by embodiments of the present disclosure;

fig. 5 is a schematic structural diagram of an adsorption layer provided in an embodiment of the present disclosure.

Reference numerals:

100. a loop bar; 110. a front end; 111. mounting grooves;

120. a back end; 130. a front section; 140. a rear section;

200. a flow channel; 210. a micro-groove flow channel; 220. a drainage channel;

300. an adsorption layer; 400. a stirring member;

500. an injection hole; 600. and a seal.

Detailed Description

So that the manner in which the features and elements of the disclosed embodiments can be understood in detail, a more particular description of the disclosed embodiments, briefly summarized above, may be had by reference to the embodiments, some of which are illustrated in the appended drawings. In the following description of the technology, for purposes of explanation, numerous details are set forth in order to provide a thorough understanding of the disclosed embodiments. However, one or more embodiments may be practiced without these details. In other instances, well-known structures and devices may be shown in simplified form in order to simplify the drawing.

The terms "first," "second," and the like in the description and in the claims, and the above-described drawings of embodiments of the present disclosure, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged under appropriate circumstances such that embodiments of the present disclosure described herein may be made. Furthermore, the terms "comprising" and "having," as well as any variations thereof, are intended to cover non-exclusive inclusions.

In the embodiments of the present disclosure, the terms "upper", "lower", "inner", "middle", "outer", "front", "rear", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings. These terms are used primarily to better describe the disclosed embodiments and their examples and are not intended to limit the indicated devices, elements or components to a particular orientation or to be constructed and operated in a particular orientation. Moreover, some of the above terms may be used to indicate other meanings besides the orientation or positional relationship, for example, the term "on" may also be used to indicate some kind of attachment or connection relationship in some cases. The specific meanings of these terms in the embodiments of the present disclosure can be understood by those of ordinary skill in the art as appropriate.

In addition, the terms "disposed," "connected," and "secured" are to be construed broadly. For example, "connected" may be a fixed connection, a detachable connection, or a unitary construction; can be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements or components. Specific meanings of the above terms in the embodiments of the present disclosure can be understood by those of ordinary skill in the art according to specific situations.

The term "plurality" means two or more unless otherwise specified.

In the embodiment of the present disclosure, the character "/" indicates that the preceding and following objects are in an or relationship. For example, A/B represents: a or B.

The term "and/or" is an associative relationship that describes objects, meaning that three relationships may exist. For example, a and/or B, represents: a or B, or A and B.

It should be noted that, in the case of no conflict, the embodiments and features in the embodiments of the present disclosure may be combined with each other.

FIG. 1 is a schematic structural diagram of an auxiliary device for screw fixation provided by an embodiment of the present disclosure; FIG. 2 is an exploded view of an auxiliary device for screw fixation provided by embodiments of the present disclosure; fig. 3 is a schematic cross-sectional view of an auxiliary device for screw fixation according to an embodiment of the present disclosure. Referring to fig. 1 to 3, an auxiliary device for screw fixation according to an embodiment of the present disclosure includes a sleeve 100, the sleeve 100 having a hollow inner cavity filled with a protective agent, a front end 110 of the sleeve 100 being used for mounting a screw head and having a flow channel 200 communicating with the hollow inner cavity, and a rear end 120 of the sleeve 100 being connectable to a rotation end of a screw driving tool and enabling the sleeve 100 to rotate synchronously with the rotation end. Wherein the protective agent can flow to the screw side through the flow passage 200 when the sleeve rod 100 is rotated.

In practical application, the outer shell of the air conditioner outdoor unit is made of metal materials for powder spraying and paint spraying, and is fixed together by screws. When the screw is fixed, the surface of the screw head is extruded by the torque gun, and the anticorrosive coating is damaged, so that the screw is rusted under the action of moisture, rainwater and the like, and the appearance of the outdoor unit of the air conditioner is influenced to be refined. In addition, the screw corrodes under the severe condition, causes failure state easily to appear its fracture inefficacy's problem, and then influence the security of air lift off-premises station, because the effect of corrosion, the screw is also inconvenient to detach and change, seriously influences the efficiency of reprocessing. In response to this, the present application provides an auxiliary device for screw fixation, which is used for improving the reliable connection between a screw and a component to be fixed, improving the problem that a screw protective layer is easy to slip due to rusting caused by extrusion friction damage of a rotating force, screw breakage and rusting, and ensuring the reliability and service durability of an air conditioner external unit.

Alternatively, after the screw head is mounted to the front end 110 of the shank 100 and the rear end 120 of the shank 100 is coupled to the rotating end of the screw driving tool, the screw may be aligned where it is desired to be secured and secured using the screw driving tool. Because the front end of the sleeve rod 100 is provided with the flow channel 200 communicated with the hollow inner cavity, in the process that the sleeve rod 100 rotates synchronously with the screwing tool of the screw to fix the screw, the protective agent filled in the hollow inner cavity can flow to one side where the screw is located through the flow channel 200 and can be distributed on the surface of the screw. Therefore, in the process of fixing the screw, the protective coating can be formed on the surface of the screw, even if the original protective layer on the surface of the screw is damaged, the protective coating formed after the protective agent flows to the surface of the screw through the flow channel 200 can further protect the screw so as to prevent the screw from being corroded or rusted after the screw is fixed, and therefore the service life of the screw and the reliability and durability of the screw in the using process can be improved.

Alternatively, the protective agent can be preservative oil, preferably preservative oil with medium viscosity index of 100-170. Alternatively, the protective agent may be a corrosion resistant paint. Alternatively, the repellent may be an abrasion resistant medium. Alternatively, the protectant may be an oxidation resistant coating. Alternatively, the repellent may be an anti-tarnish medium. Alternatively, the repellent may be a lubricating oil.

Optionally, the loop bar 100 is made of carbon steel and is plated to improve the wear resistance and the aesthetic property of the loop bar 100.

Optionally, in order to improve the stable connection between the screw and the front end 110 of the sleeve rod 100, the front end of the sleeve rod 100 is magnetized, so that the front end 110 of the sleeve rod 100 has a certain magnetic attraction capacity for the screw, and the screw is prevented from falling off, so as to avoid affecting the assembly progress of the screw.

By adopting the auxiliary device for fixing the screw, when the screw screwing tool drives the sleeve rod to synchronously rotate so as to screw the screw into the to-be-fixed part, the protective agent flows to the screw side from the hollow inner cavity via the flow channel and is distributed on the surface of the screw to form a new protective coating, so that the screw is effectively protected, and the corrosion resistance and the safety in the using process of the screw are improved.

Optionally, the front end 110 of the loop bar 100 is provided with a mounting groove 111 detachably connected with the screw head, and the flow channel 200 is provided on the bottom wall of the mounting groove 111 to communicate at least the inner cavity and the mounting groove 111.

Optionally, in order to further improve the protection effect on the screw head and improve the stable fit of the screw with the front end 110 of the sleeve rod 100, the front end 110 of the sleeve rod 100 is provided with a mounting groove 111, and the screw head can be placed in the mounting groove 111, so that the mounting groove 111 wraps the screw head. Thus, when the loop bar 100 rotates synchronously along with the screw screwing device, the screw head is transmitted by the uniform torque force of the mounting groove 111, and the protective layer on the surface of the screw can be effectively prevented from being damaged due to the uneven extrusion force on the surface of the screw.

Optionally, the flow channel 200 is opened on the bottom wall of the mounting groove 111 for communicating the inner cavity and the mounting groove 111. In this way, the protective agent filled in the hollow inner cavity can flow into the mounting groove 111 along the flow channel 200, and can be distributed on the surface of the screw head, and can also be distributed on the surface of other parts of the screw in an extending way, so that a protective coating is formed, and further protection effect on the screw is achieved.

Optionally, the end of the mounting groove 111 facing the opening of the screw head may be rounded to prevent scratching of the screw.

Fig. 4 is a partially enlarged schematic view of an auxiliary device for screw fixation provided by the embodiment of the disclosure. As shown in fig. 3 and 4, in some embodiments, the flow channel 200 includes a micro-groove flow channel 210, or includes a drainage channel 220, or includes a micro-groove flow channel 210 and a drainage channel 220. The micro channel flow path 210 is disposed on the bottom wall of the mounting groove 111. The drainage channel 220 is formed to extend along the sidewall of the mounting groove 111, and the drainage channel 220 is configured in a semicircular open type structure.

Alternatively, the cross-sectional shape of the micro-groove flow channel 210 may be triangular, circular, or polygonal. Preferably, the cross-sectional shape of the micro-groove flow channel 210 is circular, so that a dead flowing angle of the protective agent at the bending position of the micro-groove flow channel 210 can be avoided, the flowing resistance of the protective agent in the flowing process can be reduced, and the flowing smoothness of the protective agent is ensured.

Alternatively, the drainage channel 220 is formed to extend along the sidewall of the mounting groove 111, and the drainage channel 220 is configured in a semicircular open structure. Thus, under the condition that the screw head is placed in the mounting groove 111, the mounting groove 111 wraps the screw head, at the moment, the drainage channel 220 is formed on the side wall of the mounting groove 111, when the loop bar 100 rotates synchronously along with the screw screwing device, the protective agent flows along the drainage channel 220 and can be in direct contact with the screw head of the screw, so that protective layers can be formed on all sides of the screw head, the screw is effectively protected, in addition, the protective agent can also flow to the surface of the rod part of the screw along the surface of the screw head to form the protective layers, the screw is protected, and the corrosion resistance and the safety in the using process of the screw are improved.

In some embodiments, as shown in fig. 2 and 3, the auxiliary device for screw fixation further includes an absorption layer 300. The absorption layer 300 is disposed in the hollow inner cavity of the sleeve rod 100, covers the flow channel 200, and absorbs the protective agent, and is pressurized when the sleeve rod 100 rotates to transfer the protective agent to the flow channel 200.

In the using process, when the auxiliary device for screw fixation is in a static state, the adsorption layer 300 can absorb the protective agent in the hollow inner cavity of the loop bar 100 and can keep the protective agent stored in the hollow inner cavity of the loop bar 100, and when the auxiliary device for screw fixation is in a working state, namely, when the loop bar 100 rotates along with the screw screwing-in device synchronously, the adsorption layer 300 is acted by force and can transmit the protective agent to the flow channel 200, so that the protective agent can flow to one side of the screw head along the flow channel 200, and the protective agent can form a protective layer on the surface of the screw, so that the corrosion resistance of the screw and the safety of the screw in the using process are improved.

Fig. 5 is a schematic structural diagram of an adsorption layer provided in an embodiment of the present disclosure. As shown in connection with fig. 5, the absorbent layer 300 may optionally be a porous material layer.

Alternatively, the absorption layer 300 is made of a porous material, namely a foamed plastic polymer, has good water absorption, can absorb a liquid medium, and plays a role in permeation and transmission of the medium.

Alternatively, the thickness of the adsorption layer 300 ranges from 5mm to 8 mm. In this way, the permeability of the repellent can be ensured.

Optionally, the shape of the adsorbent layer is the same as the shape of the hollow lumen of the stem 100. Alternatively, the sectional shape of the hollow cavity of the sleeve 100 is hexagonal, then, the sectional shape of the adsorption layer 300 is also hexagonal, and the diameter of the inscribed circle of the hexagon of the sectional shape of the adsorption layer 300 is greater than or equal to the diameter of the inscribed circle of the hexagon of the sectional shape of the hollow cavity of the sleeve 100, preferably, the difference between the diameter of the inscribed circle of the hexagon of the sectional shape of the adsorption layer 300 and the diameter of the inscribed circle of the hexagon of the sectional shape of the hollow cavity of the sleeve 100 is 2 mm. In this way, in the case of mounting the adsorption layer 300 above the flow channel 200, the movement of the adsorption layer 300 at the design position can be restricted by the elasticity of the adsorption layer 300 to prevent the problem of misalignment.

In some embodiments, the auxiliary device for screw fixation further comprises an agitating member 400. And the stirring piece 400 is arranged in the hollow inner cavity of the sleeve rod 100 and is used for stirring the protective agent.

When the auxiliary means for screw fixation is in operation, that is, when the sleeve 100 is rotated in synchronization with the screw-in means, the stirring members 400 are moved in synchronization in the hollow inner cavity of the sleeve 100, and during the movement of the stirring members 400, the adsorption layer 300 may be struck. Under the condition that adsorbed layer 300 received the striking of stirring piece 400, adsorbed layer 300 received the effect of the striking power of stirring piece 400, has improved the transmissibility of adsorbed layer 300 to the protective agent.

In addition, when the auxiliary device for screw fixation is in operation, that is, when the sleeve 100 rotates along with the screw screwing device, the stirring member 400 moves in the hollow inner cavity of the sleeve 100, which can play a role of stirring the protective agent, and the protective agent is stirred during the action of the stirring member 400, so that the flowability of the protective agent is improved. When the stirring member 400 flexibly moves in the hollow inner cavity of the loop bar 100, the protective agent is transferred to the flow channel 200 along the adsorption layer 300 and finally transferred to the surface of the screw head, and the outer surface of the screw is covered, so that the screw head is effectively repaired or protected.

Alternatively, the stirring member 400 is a sphere structure, and a plurality of grooves (not shown) are spaced on the sphere surface to increase the roughness of the surface of the stirring member 400. Thus, under the condition that the auxiliary device for screw fixation is in operation, that is, under the condition that the loop bar 100 rotates synchronously along with the screw screwing-in device, the contact area of the stirring piece 400 and the protective agent is increased, and the action of the stirring force of the stirring piece 400 is increased, so that the action of the stirring piece 400 on the adsorption layer 300 is increased, the transferability of the protective agent is improved, and the screw head is guaranteed to be effectively repaired or protected.

In some embodiments, the auxiliary device for screw fixation further includes a filling hole 500 and a sealing member 600. And the injection hole 500 is formed from the outer wall of the sleeve rod 100 to the hollow inner cavity of the sleeve rod 100 and is used for supplementing the protective agent to the hollow inner cavity of the sleeve rod 100. The sealing member 600 is detachably disposed on the injection hole 500 to seal the injection hole 500.

Optionally, the hollow interior of the stem 100 may be supplemented with a protectant through the injection hole 500 to ensure that the stem 100 has sufficient protectant therein. Alternatively, the sealing member 600 may be detachably provided to the injection hole 500.

Under the condition that the protective agent needs to be supplemented into the hollow inner cavity of the sleeve rod 100, the sealing element 600 is disassembled, the protective agent is injected into the hollow inner cavity of the sleeve rod 100 by using a syringe or other injection tools, and after the injection of the protective agent is completed, the sealing element 600 is reassembled into the injection hole 500, so that the effect of plugging the injection hole 500 is realized, the sealing property of the hollow inner cavity of the sleeve rod 100 is ensured, and the leakage of the protective agent is prevented.

Optionally, the hole is filled with 500 threaded holes, and the sealing member 600 is a screw threadedly engaged with the threaded hole to facilitate detachability and sealing of the sealing member 600.

Optionally, the rear end 120 of the stem 100 is configured as a polygonal rod-like structure with which the rotating end of the screw-in tool mates.

Alternatively, the screw driving tool may be a torque gun. In this case, the rear end 120 of the sleeve rod 100 is constructed in a polygonal rod-shaped structure to be assembled and fixed with a telescopic clamping sleeve of the torque gun, so as to realize the transmission of the torque force of the torque gun.

Optionally, design parameters of the polygonal rod-shaped structure, such as the diameter of the circumscribed circle, the length, etc. of the polygonal rod-shaped structure, are designed with reference to national standards to ensure the versatility of the auxiliary device for screw fixation so that it can be matched with a pneumatic torque gun or can be matched with an electric torque gun.

Optionally, the stem 100 includes a front section 130 and a rear section 140, the front section 130 and the rear section 140 being threadably connected. To facilitate assembly of the components within the hollow interior of the stem 100, the stem 100 includes a front section 130 and a rear section 140 that are threadably connected.

In the actual use process, after the adsorption layer 300 and the stirring piece 400 are installed in the hollow inner cavity of the loop bar 100, the front section 130 and the rear section 140 of the loop bar 100 are assembled together, the protective agent is injected into the hollow inner cavity of the loop bar 100 through the injection hole 500, then the sealing piece 600 is installed on the injection hole, the assembly of the auxiliary device for fixing the screws can be completed, and the auxiliary device can be directly used after the assembly is completed. The auxiliary device for screw fixation can be directly connected and fixed with a screw screwing tool such as a pneumatic torque gun or an electric torque gun on the market by a rod-shaped structure configured in a polygon and arranged at the rear end 120 of the loop bar 100.

A mounting slot 111, provided at the forward end 110 of the shank 100, may be used to mount and receive the screw head to ensure a more uniform torque force transmission to the screw head. Under the condition that the screw screwing tool works, the loop bar 100 can be enabled to synchronously rotate along with the rotating end of the screw screwing tool, and the rotating acting force of the screw screwing tool can be transmitted to the screw, so that the screw can be fixed or detached.

In the process of fixing or disassembling the screw, the protective agent can permeate into the flow channel 200 along the adsorption layer 300 and is finally transmitted to the surface of the screw head, so that the protective agent can form a protective layer on the surface of the screw head, the screw is protected or repaired, the screw corrosion prevention effect is improved, and the problem that the screw is rusted due to extrusion damage generated in the prior screw fixing process is solved. In this process, the stirring member 400 moves in the hollow inner cavity of the stem 100 to perform the function of stirring the repellent to improve the flowing of the repellent.

In the process of using the auxiliary device for screw fixation, if the sealant is completely consumed, the sealing member 600 may be removed to open the injection hole 500, the sealant may be injected using an injection tool such as a syringe, and after the injection is completed, the sealing member 600 may be reassembled into the injection hole 500.

The above description and drawings sufficiently illustrate embodiments of the disclosure to enable those skilled in the art to practice them. Other embodiments may include structural and other changes. The examples merely typify possible variations. Individual components and functions are optional unless explicitly required, and the sequence of operations may vary. Portions and features of some embodiments may be included in or substituted for those of others. The embodiments of the present disclosure are not limited to the structures that have been described above and shown in the drawings, and various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims (10)

1. An auxiliary device for fixing a screw is characterized by comprising a loop bar, wherein the loop bar is provided with a hollow inner cavity and is filled with protective agent, the front end of the loop bar is used for installing a screw head and is provided with a flow passage communicated with the hollow inner cavity, and the rear end of the loop bar can be connected with a rotating end of a screw screwing tool and can enable the loop bar to synchronously rotate along with the rotating end;

wherein the protective agent flows to the screw side via the flow channel when the sleeve rod rotates.

2. The auxiliary device as claimed in claim 1, wherein the front end of the loop bar is provided with a mounting groove detachably connected with the screw head, and the flow channel is provided at the bottom wall of the mounting groove to communicate at least the inner cavity and the mounting groove.

3. The accessory device of claim 2, wherein the flow path comprises:

the micro-groove flow channel is arranged on the bottom wall of the mounting groove; and/or the presence of a gas in the gas,

and the drainage channel is formed by extending the side wall of the mounting groove and is constructed into a semicircular opening type structure.

4. The assistance device according to claim 1, further comprising:

the adsorption layer is arranged in the inner cavity, covers the flow channel, is used for absorbing the protective agent, and can transmit the protective agent to the flow channel under the action of pressure when the loop bar rotates.

5. Auxiliary device according to claim 4, characterized in that the adsorption layer is a layer of porous material.

6. The assist device according to any one of claims 1 to 5, characterized by further comprising:

and the stirring piece is arranged in the inner cavity and is used for stirring the protective agent.

7. The assist device of claim 6 wherein the agitating member is a spherical member having a plurality of spaced grooves.

8. The assist device according to any one of claims 1 to 5, characterized by further comprising:

the injection hole penetrates through the outer wall of the sleeve rod to the inner cavity for molding and is used for supplementing the protective agent to the inner cavity;

the sealing piece is detachably arranged on the injection hole and used for plugging the injection hole.

9. Auxiliary device according to any of claims 1-5, characterized in that the rear end of the shank is configured as a polygonal rod-like structure, with which the rotating end of the screw-in tool cooperates.

10. Auxiliary device according to any one of claims 1-5, wherein the shank comprises a front section and a rear section, which front section and rear section are threadedly connected.

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