CN214837751U - Waterproof cap for locking and fixing piece - Google Patents

Abstract

The utility model discloses a waterproof cap for a locking part, which comprises a first containing cavity and a second containing cavity which are integrally formed, wherein the first containing cavity and the second containing cavity are coaxially arranged, the caliber of the first containing cavity is smaller than that of the second containing cavity, and the bottom of the second containing cavity is an opening; the top end face of the first cavity is a sealing panel or the top end face of the first cavity is communicated with a third cavity, and the caliber of the third cavity is smaller than that of the first cavity; when the top end face of the first containing cavity is a sealing panel, the inner cavities of the first containing cavity and the second containing cavity are filled with waterproof glue or sealing elements are arranged on the bottom end faces of flanges, and a fastening structure is arranged on the inner wall of the first containing cavity; when the top end face of the first containing cavity is communicated with the third containing cavity, the inner cavities of the first containing cavity, the second containing cavity and the third containing cavity are filled with waterproof glue or the top inner wall of the first containing cavity and the bottom end face of the flange are both provided with sealing parts, and the inner walls of the first containing cavity and the third containing cavity are provided with fastening structures. The utility model discloses simple structure, convenient installation.

Description

Waterproof cap for locking and fixing piece

Technical Field

The utility model belongs to the technical field of high-voltage apparatus, specifically belong to a locking part is with waterproof cap.

Background

For the whole electric appliance industry, particularly the high-voltage electric appliance industry, the assembly of equipment parts mainly depends on screws, nuts, screws and gaskets for fastening, and the waterproof effect of screw parts after the assembly is solved by the industry; for example, waterproof of the high-voltage switch flange butt joint screw can only be achieved by coating waterproof glue or using a rainproof cap at present, and the waterproof glue coated on the screw has the defects of low efficiency and easy adhesion to sandy soil, so that the appearance of a product is influenced; the rainproof cap used for the screw has the defects of high cost and poor waterproof effect.

The polyethylene heat-shrinkable waterproof cap belongs to the field of heat-shrinkable products at present. The heat-shrinkable tube is sleeved on the locking piece and heated by the hot air blower, so that the heat-shrinkable tube shrinks to wrap the whole locking piece, and a waterproof sealing effect is achieved; but the locking piece is shrunk and wrapped by the heating principle of the air heater, and the waterproof sealing performance is poor; and secondly, the polyethylene heat-shrinkable waterproof cap is short in outdoor service life due to material limitation, and if other materials are selected, the heat-shrinkable performance is poor, and the sealing effect cannot be achieved.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem that exists among the prior art, the utility model provides a locking part is with waterproof cap solves the poor problem of locking part's waterproof sealing nature.

In order to achieve the above object, the utility model provides a following technical scheme: a waterproof cap for a locking part comprises a first containing cavity and a second containing cavity which are integrally formed, wherein the first containing cavity and the second containing cavity are coaxially arranged, the caliber of the first containing cavity is smaller than that of the second containing cavity, the first containing cavity and the second containing cavity are communicated, the bottom of the second containing cavity is an opening, and a flange is integrally arranged on the end surface of the bottom of the second containing cavity;

the top end face of the first cavity is a sealing panel or the top end face of the first cavity is communicated with a third cavity, and the caliber of the third cavity is smaller than that of the first cavity;

when the top end face of the first containing cavity is a sealing panel, the inner cavities of the first containing cavity and the second containing cavity are filled with waterproof glue or sealing elements are arranged on the bottom end faces of flanges, and a fastening structure is arranged on the inner wall of the first containing cavity;

when the top end face of the first containing cavity is communicated with the third containing cavity, the inner cavities of the first containing cavity, the second containing cavity and the third containing cavity are filled with waterproof glue or the top inner wall of the first containing cavity and the bottom end face of the flange are both provided with sealing parts, and the inner walls of the first containing cavity and the third containing cavity are provided with fastening structures.

Further, the flange extends outwards from the bottom end face of the second cavity along the axial direction or the flange extends outwards from the side wall of the second cavity along the radial direction.

Furthermore, the top end surface of the second containing cavity and/or the outer side wall of the second containing cavity are coated with waterproof glue.

Further, the sealing member includes first sealing washer or first sealed the pad, the seal groove has all been seted up on the bottom terminal surface that the second held the chamber and on the top inner wall that the first chamber was held, first sealing washer or first sealed pad are installed in the seal groove.

Furthermore, the top end face of the first accommodating cavity is a sealing panel, the fastening structure comprises an internal thread, and the inner wall of the first accommodating cavity is provided with the internal thread.

Furthermore, the top end face of the first accommodating cavity is a sealing panel, the fastening structure comprises a clamping block, a plurality of clamping blocks are arranged on the inner wall of the first accommodating cavity in an annular array mode, and the bulges of the clamping blocks point to the circle center of the second accommodating cavity.

Furthermore, the top end face of the first accommodating cavity is communicated with a third accommodating cavity, the fastening structure is an internal thread, and the inner wall of the first accommodating cavity and/or the inner wall of the third accommodating cavity are provided with internal threads.

Furthermore, the fastening structure further comprises a second sealing ring or a second sealing gasket, and the inner wall of the third cavity is provided with the second sealing ring or the second sealing gasket.

Furthermore, the top end face of the first accommodating cavity is communicated with a third accommodating cavity, the fastening structure of the first accommodating cavity is a clamping block, a plurality of clamping blocks are annularly arrayed on the inner wall of the first accommodating cavity, and the bulge of each clamping block points to the circle center of the first accommodating cavity;

the fastening structure of the third cavity is an internal thread.

Furthermore, the top end face of the first accommodating cavity is communicated with a third accommodating cavity, the fastening structure of the first accommodating cavity is an internal thread, the fastening structure of the third accommodating cavity is a clamping block, a plurality of clamping blocks are annularly arrayed on the inner wall of the third accommodating cavity, and the bulges of the clamping blocks point to the circle center of the third accommodating cavity.

Compared with the prior art, the utility model discloses following beneficial effect has at least:

the utility model provides a waterproof cap for locking part, which comprises a main body structure of the whole waterproof cap through a first containing cavity and a second containing cavity, and can be matched with a nut regular hexagonal structure or a round screw round structure according to different types and types of the locking part and different end surface structures through a step design; wrap up whole locking part, simultaneously, two kinds of structures of this device carry out waterproof sealing through the dual mode respectively, the first kind is the packing that directly passes through the waterproof glue, can be in waterproof glue dry back, make waterproof cap firmly bond on the fastener, whole structural design three-layer waterproof check keep off, first check keep off to the waterproof cap shell, the second is the waterproof gluey formation check of intercommunication cavity and keeps off, the third is for designing cavity 3 alone at waterproof cap terminal surface and forming check fender or the second kind of mode and set up the sealing member on the flange and the second holds the chamber, hold the firm connection on the fastener of chamber with first appearance chamber and third appearance chamber according to the fastener that first appearance chamber and third held the chamber after that follows, the interlock that relies on the fastener forms fastening force, form sealed passageway after the sealing member pressurized after the atress, carry out waterproof sealing to the locking part. The locking part and the waterproof cap of this device form a plurality of cavitys, form a plurality of waterproof barriers through injecting glue or a plurality of sealing members and fastening structure, in the effectual waterproof cap of infiltration such as preventing moisture impurity, further prevent moisture impurity to lock firmware corruption etc. play good waterproof and guard action to the locking part, this waterproof cap simple structure, convenient installation, dismantlement and maintenance, manufacturing cost is lower, life is longer, effectively prolongs locking part and assembly part life-span.

Furthermore, the design of the flange can increase the end surface area of the second containing cavity, the connection is convenient, the flange extends outwards along the axial direction by the bottom end surface of the second containing cavity to prolong the length of the second containing cavity, or the flange extends outwards along the radial direction from the side wall of the second containing cavity, so that the outer diameter of the flange is larger than the outer diameter of the second containing cavity, a sealing element is convenient to install, the contact area is increased, and the sealing effect is increased.

Furthermore, the top end face of the second cavity and/or the outer side wall of the second cavity are coated with waterproof glue, and the waterproof glue can be glued with an external structure; this structural design not only can improve sealed water-proof effects, still makes this waterproof cap and locking part's connection more firm.

Furthermore, the first cavity can be matched with the external thread of the locking part through the internal thread, and meanwhile through the matching of the sealing element, the waterproof rubber cap can be replaced, or the manual coating waterproof rubber can be replaced, so that the manufacturing cost is greatly reduced, and the efficiency of a waterproof process (manual coating waterproof rubber) is improved.

Furthermore, the first chamber adopts the joint piece, is firmly connected with the locking part in order to realize this waterproof cap under the effect of elasticity, and the dismouting is convenient with the maintenance.

Furthermore, the internal thread design of the first cavity and/or the third cavity adopts a multi-cavity waterproof design, so that the waterproof performance of the locking part is effectively improved.

Furthermore, the waterproof performance of the third cavity can be enhanced through the design of a second sealing ring or a second sealing gasket of the third cavity.

Furthermore, the third holds the internal thread and the joint piece design that chamber and first appearance chamber, can effectively the waterproof problem of locking part, especially the waterproof problem of screw class part, simple structure, it is convenient to use, the manufacturing of being convenient for, manufacturing and use cost are low, and sealed waterproof and protection are effectual, are favorable to prolonging the life of locking part, and still possess the effect of theftproof.

Drawings

Fig. 1 is a sectional view of an embodiment of the present invention;

fig. 2 is a cross-sectional view of an embodiment of the present invention;

fig. 3 is a cross-sectional view of an embodiment of the present invention;

FIG. 4 is an enlarged view of a portion B of FIGS. 1 and 3;

fig. 5 is a cross-sectional view of an embodiment of the present invention;

fig. 6 is a cross-sectional view of an embodiment of the present invention;

fig. 7 is a schematic structural view of the present invention connected to the locking member;

in the drawings: the sealing structure comprises a cap body 1, a sealing piece 2, a first containing cavity 3, a second containing cavity 4, a flange 5, a sealing groove 6, a sealing panel 7, an internal thread 8, a clamping block 9, a third containing cavity 10, a first containing cavity top inner wall 11, a screw 12, a first gasket 13, a first part 14, a second part 15, a second gasket 16 and a nut 17.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and the detailed description.

The utility model provides a waterproof cap for locking part, including integrated into one piece's first appearance chamber 3 and second appearance chamber 4, first appearance chamber 3 and second appearance chamber 4 are coaxial to be set up, the bore of first appearance chamber 3 is less than the bore of second appearance chamber 4, first appearance chamber 3 and second appearance chamber 4 link up, the bottom of second appearance chamber 4 is the opening, the bottom terminal surface integration of second appearance chamber 4 is equipped with flange 5; the waterproof cap comprises a cap top waterproof cap and a screw rod waterproof cap, the cap top waterproof cap comprises a first cavity 3 and a second cavity 4 which are integrally formed, and the first cavity 3 is a sealing panel 7; the screw rod waterproof cap comprises a first containing cavity 3 and a second containing cavity 4 which are integrally formed, and the top end surfaces of the third containing cavity 10 and the first containing cavity 3 are communicated; the waterproof cap is used for being sleeved on the locking part, wherein the locking part comprises a nut, a screw rod, a gasket, an elastic cushion and the like, as shown in fig. 7, after the screw penetrates through the first part 14 and the second part 15, the screw is fastened through the nut 17, the first gasket 13 is sleeved between the cap top of the screw 12 and the first part, and the second gasket 16 is sleeved between the nut 17 and the second part 15.

When will prevent that water cap suit carries out waterproof sealing to preventing that water cap carries out waterproof sealing treatment on the fastener, and it mainly divide into two kinds of waterproof construction:

the first structure relies on the assembly of a waterproof cap and a locking member to form a cavity, as shown in fig. 1-6, and waterproof glue is injected into the cavity to perform waterproof sealing. The structure of the waterproof cap comprises one or more step-shaped cavities, the cavities are communicated with one another, the end surface cavities of the waterproof cap are separated from other cavities, and waterproof barriers are further added; when waterproof cap pours into waterproof glue and locking part assembly together, whole structure department designs the waterproof check of three-layer and keeps off, and first check keep off for waterproof cap shell, and the second keeps off for the waterproof gluey formation check of intercommunication cavity keeps off, and the third is for designing cavity 3 formation check alone at waterproof cap terminal surface and keeping off.

The waterproof cap of second kind of structure contains the cap body and sealing member 2, mainly relies on the fastening structure interlock of waterproof cap to form fastening force, and waterproof cap end face sealing member pressurized forms sealed passageway behind the atress, carries out waterproof sealing to the locking part. Or through another kind of fastening structure of waterproof cap, with the locking part assembly pressurized formation chucking power, the end face sealing member pressurized forms sealed passageway, carries out waterproof sealing effect to the locking part. The structure does not need to be injected with sealant for waterproof sealing, but waterproof sealing is carried out through the sealing piece.

In practical application, the waterproof cap is sleeved on the main body of the locking part (such as a screw, a nut, a spring cushion and the like), the locking part and the waterproof cap form a plurality of cavities, a plurality of waterproof barriers are formed by injecting glue or a plurality of sealing rings, moisture impurities and the like are effectively prevented from permeating the waterproof cap, the moisture impurities are further prevented from corroding the locking part and the like, and the waterproof cap has good waterproof and protective effects on the locking part.

Specifically, the waterproof structure of the waterproof cap on the top of the cap is divided into two types, as shown in fig. 3 and 4, the first type is that waterproof glue is filled in the inner cavities of the first cavity 3 and the second cavity 4; in the second mode, a sealing element 2 is arranged on the bottom end face of the flange 5, and a fastening structure is arranged on the inner wall of the first accommodating cavity 3;

the waterproof structure of the screw waterproof cap is divided into two types, as shown in fig. 1, the first type is that waterproof glue is filled in the inner cavities of a first containing cavity 3, a second containing cavity 4 and a third containing cavity 10; the second is that the bottom terminal surface of first appearance chamber top inner wall 11 and flange 5 all is equipped with sealing member 2, and the sealing member includes first sealing washer or first sealed the pad, is equipped with fastening structure on the inner wall that first appearance chamber 3 and third held the chamber 10.

Example 1

As shown in fig. 5, the utility model provides a pair of waterproof cap of locking part of integral type structure, it includes the cap body 1 and sealing member 2, and sealing member 2 includes first sealing washer or first sealed the pad, and cap body 1 includes first appearance chamber 3 and holds chamber 4 with the second that first appearance chamber 3 communicates, and the bore that the second holds chamber 4 is greater than the bore that first appearance chamber 3, and first appearance chamber 3 holds the coaxial setting of chamber 4 with the second, and first sealing washer or first sealed pad set up in the open end that the second holds chamber 4.

In practical application, the waterproof cap is sleeved outside a top cap or a main body of a locking piece (such as a bolt, a nut, a gasket and the like), the top cap or the main body of the locking piece is accommodated in the first accommodating cavity 3, a first gasket 13 between the top cap or the main body of the locking piece and an external structure is accommodated in the second accommodating cavity 4, a gap between the external structure and the end part of the second accommodating cavity 4 is sealed through a first sealing ring or a first sealing gasket, so that the locking piece and the first gasket 13 are sealed, the sealing performance is good, impurities such as moisture and the like cannot permeate into the waterproof cap, the locking piece is prevented from being corroded by the impurities such as external moisture and the like, the locking piece is well sealed, waterproof and protected, the service life of the locking piece can be effectively prolonged, and the anti-theft effect is achieved. The utility model has the advantages of simple structure, it is convenient to use, the manufacturing of being convenient for, it is low with use cost to make, and is sealed waterproof and protect effectual, is favorable to prolonging the life of locking part, and still possesses the effect of theftproof.

In order to further improve the waterproof performance, the top end face or/and the outer side wall of the second cavity 4 is/are coated with waterproof glue, and the waterproof glue is adhered to an external structure; this structural design not only can improve sealed water-proof effects, still makes this waterproof cap and locking part's connection more firm.

In this embodiment, the opening end of the second accommodating cavity 4 is provided with a flange 5 in an outward protruding manner, the first sealing ring or the first sealing gasket is mounted on the flange 5, the flange 5 may extend outward from the end surface of the second accommodating cavity 4 along the axial direction, so as to prolong the length of the second accommodating cavity 4, or may extend outward from the sidewall of the second accommodating cavity 4 along the radial direction, so that the outer diameter of the flange 5 is greater than the outer diameter of the second accommodating cavity 4. Through setting up flange 5, the installation of the sealing washer/pad of being convenient for, and make the appearance of this waterproof cap pleasing to the eye.

In this embodiment, the free end of the flange 5 is recessed inward to form a sealing groove 6, and the first sealing ring or the first sealing gasket is accommodated in the sealing groove 6. This structural design, seal groove 6 fixes a position first sealing washer or first sealed pad, not only is convenient for the dismouting of first sealing washer or first sealed pad, has still guaranteed the position accuracy and the stability of first sealing washer or first sealed pad for first sealing washer or first sealed pad are difficult to drop or warp inefficacy.

In this embodiment, a sealing panel 7 is disposed at one end of the first cavity 3 away from the second cavity 4. This structural design can cover the hood or the main part of locking part completely, has further improved the effect of sealed waterproof and protection.

In this embodiment, the inner wall of the first cavity 3 is provided with an internal thread 8. When the main body or the top cap of the locking part is externally provided with an external thread (for example, the locking part is a screw), the internal thread 8 of the first containing cavity 3 is in threaded connection with the external thread of the main body or the top cap of the locking part, so that the waterproof cap is firmly connected with the locking part, and is convenient to disassemble, assemble and maintain.

Example 2

As shown in fig. 6, the present embodiment is different from the first embodiment in that: one or more clamping blocks 9 are arranged on the inner wall of the first accommodating cavity 3; when the number of the clamping blocks 9 is multiple, the clamping blocks 9 are arranged in an annular array around the central axis of the first cavity 3. After this waterproof cap suit is outside the locking part, through the lateral wall joint of one or more joint piece 9 and locking part to realize this waterproof cap and locking part's firm connection.

In this embodiment, one or more clamping blocks 9 are disposed on the inner wall of the first accommodating cavity 3, and the clamping blocks 9 are elastic clamping blocks, such as rubber blocks. Because joint piece 9 has elasticity, so when this waterproof cap suit was outside the locking part, elastic deformation can take place for joint piece 9, and is firmly connected with the locking part in order to realize this waterproof cap under the effect of elasticity, and the dismouting is convenient with the maintenance.

The remaining structure of this embodiment is the same as that of the first embodiment, and the same structure is analyzed by the first embodiment, which is not described in detail herein.

Example 3

The present embodiment is different from the first and second embodiments in that: one end, far away from the second containing cavity 4, of the first containing cavity 3 is communicated with a third containing cavity, the third containing cavity is arranged on the sealing panel 7, the first containing cavity 3, the second containing cavity 4 and the third containing cavity are coaxially arranged, and the caliber of the third containing cavity is smaller than that of the first containing cavity 3. When the locking piece is a nut locked on the screw rod, the nut is accommodated in the first accommodating cavity 3, the second gasket is accommodated in the second accommodating cavity 4, and the end part of the screw rod extends out of the waterproof cap through the third accommodating cavity; the third chamber provides the space that runs through for the screw rod, has guaranteed the locking part normal work, and has played the effect of fine waterproof seal and protection.

When the inner wall that holds the chamber as the third was provided with second sealing washer 11 or the sealed pad of second, through the sealed clearance that holds between the inner wall that holds the chamber and the lateral wall of locking part of second sealing washer 11 or the sealed pad of second, avoid impurity such as moisture to permeate this waterproof cap via this clearance in, further improve sealed waterproof effect.

As shown in fig. 2, in the present embodiment, an inner wall of the first cavity 3 or/and an inner wall of the third cavity is provided with an internal thread 8. Through the external screw thread threaded connection of internal thread 8 with the locking part for this waterproof cap and locking part's firm in connection, the dismouting is convenient with the maintenance, and water-proof effects is good.

The remaining structure of this embodiment is the same as that of the first embodiment and the second embodiment, and the same structure is analyzed by the first embodiment and the second embodiment, which is not described in detail herein.

Example 4

The present embodiment is different from the third embodiment in that: the inner wall of the third cavity is provided with internal threads 8, and the first cavity 3 is internally provided with one or more clamping blocks 9. When the lateral wall joint through joint piece 9 and locking part, the external screw thread threaded connection of internal thread 8 and locking part for this waterproof cap is more firm with locking part's being connected, and water-proof effects is better.

The remaining structure of this embodiment is the same as that of the third embodiment, and the same structure is analyzed by the third embodiment, which is not described in detail herein.

Example 5

The present embodiment is different from the fourth embodiment in that: the inner wall of the first accommodating cavity 3 is provided with an internal thread 8, and the inner wall of the third accommodating cavity 2 is provided with one or more clamping blocks 9. When the lateral wall joint through joint piece 9 and locking part, the external screw thread threaded connection of internal thread 8 and locking part for this waterproof cap is more firm with locking part's being connected, and water-proof effects is better.

The remaining structure of this embodiment is the same as that of the fourth embodiment, and the same structure is analyzed by the fourth embodiment, which is not described in detail herein.

All the technical features in the embodiment can be freely combined according to actual needs.

The utility model has different end surface structures according to different types and kinds of locking pieces, and can be a regular hexagonal structure matched with nuts or a circular structure of round screws; the step-type design of the upper drawing can reduce or increase steps according to whether the gasket is installed on the screw part; but not limited to the shape of the end face and the number of steps. The clavicle part mainly comprises a nut, a screw rod, a gasket, an elastic cushion and other parts, and the clavicle part is freely matched to form different assembly units, such as different combination modes of matching of the screw and the gasket, matching of the nut and the gasket, matching of the screw/the nut and the gasket and the like. In actual clavicle and product assembling process, there is the clearance between clavicle and the product, and moisture permeates to the product in through the clearance easily, corrodes even destruction to the interior core part of product, makes its life-span reduce, can not satisfy the waterproof requirement of scene, as for current waterproof construction, because of its structure is complicated, the installation, dismantle and maintain more complicacy, its manufacturing cost is higher, consequently, this structure is based on above-mentioned problem, designs a simple and easy waterproof cap structure, solves above-mentioned waterproof construction defect.

Finally, it should be noted that: the above-mentioned embodiments are only specific embodiments of the present invention, and are not intended to limit the technical solution of the present invention, and the protection scope of the present invention is not limited thereto, although the present invention is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: those skilled in the art can still modify or easily conceive of changes in the technical solutions described in the foregoing embodiments or make equivalent substitutions for some technical features within the technical scope of the present disclosure; such modifications, changes or substitutions do not substantially depart from the spirit and scope of the embodiments of the present invention, and are intended to be included within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (10)

1. A waterproof cap for a locking part is characterized by comprising a first containing cavity (3) and a second containing cavity (4) which are integrally formed, wherein the first containing cavity (3) and the second containing cavity (4) are coaxially arranged, the caliber of the first containing cavity (3) is smaller than that of the second containing cavity (4), the first containing cavity (3) is communicated with the second containing cavity (4), the bottom of the second containing cavity (4) is provided with an opening, and the end face of the bottom of the second containing cavity (4) is integrally provided with a flange (5);

the top end face of the first containing cavity (3) is a sealing panel (7) or the top end face of the first containing cavity (3) is in through connection with a third containing cavity (10), and the caliber of the third containing cavity (10) is smaller than that of the first containing cavity (3);

when the top end face of the first containing cavity (3) is a sealing panel (7), the bottom end faces of the inner cavities of the first containing cavity (3) and the second containing cavity (4) filled with waterproof glue or a flange (5) are provided with sealing elements (2), and the inner wall of the first containing cavity (3) is provided with a fastening structure;

when the top end face of first appearance chamber (3) intercommunication had third appearance chamber (10), first appearance chamber (3) and second appearance chamber (4) and the bottom terminal surface that is filled with waterproof glue or the top inner wall of first appearance chamber (3) and flange (5) in the inner chamber that holds chamber (10) with the third all are equipped with the sealing member, be equipped with fastening structure on the inner wall that first appearance chamber (3) and third held chamber (10).

2. A flashing cap for a fastener according to claim 1, wherein the flange (5) extends axially outwardly from a bottom end surface of the second cavity (4) or the flange (5) extends radially outwardly from a side wall of the second cavity (4).

3. A water-proof cap for a fastener according to claim 1, wherein the top end surface of the second cavity (4) and/or the outer side wall of the second cavity (4) is coated with a water-proof glue.

4. The waterproof cap for the locking part according to claim 1, wherein the sealing member comprises a first sealing ring or a first sealing gasket, a sealing groove (6) is formed in each of the bottom end surface of the second accommodating cavity (4) and the top inner wall of the first accommodating cavity (3), and the first sealing ring or the first sealing gasket is mounted in the sealing groove (6).

5. The waterproof cap for the locking part according to claim 1, wherein the top end face of the first cavity (3) is a sealing panel (7), the fastening structure comprises an internal thread, and the internal thread is arranged on the inner wall of the first cavity (3).

6. The waterproof cap for the locking part according to claim 1, wherein the top end face of the first accommodating cavity (3) is a sealing panel (7), the fastening structure comprises a clamping block (9), a plurality of clamping blocks (9) are arranged on the inner wall of the first accommodating cavity (3) in an annular array, and a protrusion of each clamping block (9) points to the center of the second accommodating cavity (4).

7. The waterproof cap for the locking part according to claim 1, wherein the top end face of the first cavity (3) is communicated with a third cavity (10), the fastening structure is an internal thread, and the inner wall of the first cavity (3) and/or the inner wall of the third cavity (10) are provided with internal threads.

8. The waterproof cap for the locking part according to claim 7, wherein the fastening structure further comprises a second sealing ring (11) or a second sealing gasket, and the second sealing ring or the second sealing gasket is arranged on the inner wall of the top of the third cavity (10).

9. The waterproof cap for the locking part according to claim 1, wherein the top end face of the first accommodating cavity (3) is communicated with a third accommodating cavity (10), the fastening structure of the first accommodating cavity (3) is a clamping block (9), a plurality of clamping blocks (9) are annularly arrayed on the inner wall of the first accommodating cavity (3), and the protrusion of the clamping block (9) points to the center of the first accommodating cavity (3);

the fastening structure of the third cavity (10) is an internal thread.

10. The waterproof cap for the locking part according to claim 1, wherein a third accommodating cavity (10) is communicated with an end face of the top of the first accommodating cavity (3), a fastening structure of the first accommodating cavity (3) is an internal thread, a fastening structure of the third accommodating cavity (10) is a clamping block (9), a plurality of clamping blocks (9) are annularly arrayed on the inner wall of the third accommodating cavity (10), and a protrusion of each clamping block (9) points to a circle center of the third accommodating cavity (10).

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