Faucet positioning tool

Abstract

The utility model discloses a faucet positioning tool. The faucet positioning tool comprises a bottom plate; the fixing seats are used for fixing the bottom of a faucet workpiece, the multiple fixing seats are detachably installed on the bottom plate in a matrix arrangement of M transverse rows * N longitudinal columns, and M and N are positive integers larger than 1; the supporting seat is installed on the bottom plate in a lifting mode, a plurality of positioning openings used for positioning and supporting faucet workpieces are formed in the supporting seat, the projection of the positioning openings on the bottom plate is located between two adjacent transverse rows, and the positioning openings are in one-to-one alignment with the fixing seats on the longitudinal columns. The faucet fixing device is simple in structure, convenient to use, wide in applicability and capable of being matched with different faucet workpieces for fixing.

Description

Technical Field

[0001] This utility model relates to tooling and fixtures, and in particular to a faucet positioning tooling. Background Technology

[0002] In the production of faucets, the surface or specific areas of the faucet need to be polished. Before polishing, the faucet workpiece needs to be fixed in place. Existing fixtures can only hold one faucet workpiece at a time. After polishing each workpiece, it must be removed and replaced with another workpiece to be polished, which significantly impacts production efficiency. Some fixtures have multiple stations, but each station is only compatible with a fixed faucet model, making them unsuitable for producing a variety of faucet models and limiting their applicability. Utility Model Content

[0003] This utility model aims to at least partially solve one of the aforementioned technical problems in related technologies. To this end, this utility model proposes a faucet positioning fixture.

[0004] To achieve the above objectives, the technical solution of this utility model is as follows:

[0005] The faucet positioning fixture according to a first aspect embodiment of the present invention includes:

[0006] Base plate;

[0007] A fixing seat is used to fix the bottom of the faucet workpiece. Multiple fixing seats are detachably installed on the base plate in a matrix arrangement of M horizontal rows × N vertical columns, where M and N are positive integers greater than 1.

[0008] A support base is provided, which is elliptical and can be mounted on the base plate. The support base is provided with a plurality of positioning ports for positioning and supporting the faucet workpiece. The projection of the positioning port on the base plate is located between two adjacent horizontal rows. The positioning port is aligned one-to-one with the fixed seat on the vertical column.

[0009] The faucet positioning fixture according to the embodiments of this utility model has at least the following beneficial effects: simple structure, convenient use, wide applicability, and can be adapted to fix different faucet workpieces, thereby improving production efficiency.

[0010] According to some embodiments of the present invention, the positioning opening is formed by a V-shaped indentation from the upper side of the support base downwards.

[0011] According to some embodiments of the present invention, the positioning port includes a first positioning surface, a second positioning surface and a third positioning surface. The first positioning surface and the second positioning surface are both inclined and distributed in an inverted octagonal shape. The third positioning surface is connected between the bottom side of the first positioning surface and the bottom side of the second positioning surface.

[0012] According to some embodiments of the present invention, the third positioning surface is a plane or a downwardly concave arc surface.

[0013] According to some embodiments of the present invention, the base plate is provided with a plurality of first screw holes, which are arranged in a matrix of M horizontal rows × N vertical rows on the base plate. Each of the fixing seats is installed on the base plate by first screws cooperating with the first screw holes.

[0014] According to some embodiments of the present invention, the fixing base is provided with a first stepped through hole, the upper diameter of the first stepped through hole is larger than its lower diameter, and the first screw passes through the first stepped through hole and is locked onto the first screw hole.

[0015] According to some embodiments of the present invention, the two sides of the support base are respectively mounted on the base plate by screws, and the upper and lower sides of the same end of the support base are locked to the screws by nuts.

[0016] According to some embodiments of the present invention, a second screw hole and a pin blind hole are provided on the base plate. The screw is connected to the second screw hole. The pin blind hole extends from one side of the base plate into the second screw hole in a direction perpendicular to the second screw hole. The pin blind hole is used to insert a pin.

[0017] According to some embodiments of the present invention, the base plate is provided with a plurality of second stepped through holes, wherein the upper diameter of the second stepped through hole is larger than the lower diameter.

[0018] According to some embodiments of the present invention, the fixing base includes a base, on which at least one of a first fixing part and a second fixing part is provided. The first fixing part includes a first cylinder and a second cylinder arranged coaxially in a stepped manner. The outer diameter of the first cylinder is larger than the outer diameter of the second cylinder, and the outer diameter of the first cylinder is smaller than the minimum outer diameter of the base. The second fixing part includes a third cylinder and a frustum arranged coaxially. The larger outer diameter end of the frustum is coaxially connected to one end of the third cylinder and has the same outer diameter. The frustum gradually decreases in size away from the third cylinder. The outer diameter of the third cylinder is smaller than the minimum outer diameter of the base.

[0019] When only the first fixing part is provided on the base, the end of the first cylinder away from the second cylinder is connected to the base;

[0020] When only the second fixing part is provided on the base, the end of the third cylinder away from the frustum is connected to the base;

[0021] When the base is provided with both the first fixing part and the second fixing part, the end of the first cylinder away from the second cylinder is coaxially connected to the small diameter end of the frustum, and the end of the third cylinder away from the frustum is connected to the base. The outer diameter of the first cylinder is smaller than the outer diameter of the small diameter end of the frustum.

[0022] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0023] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0024] Figure 1 This is a structural diagram of the base plate;

[0025] Figure 2 yes Figure 1 A sectional view;

[0026] Figure 3 This is a schematic diagram illustrating one method of using the faucet positioning fixture;

[0027] Figure 4 yes Figure 3 A diagram illustrating the usage status;

[0028] Figure 5 This is a structural schematic diagram of the first faucet workpiece;

[0029] Figure 6 This is a schematic diagram of one embodiment of the fixed base;

[0030] Figure 7 This is a schematic diagram illustrating the second method of using the faucet positioning fixture;

[0031] Figure 8 yes Figure 7 Top view;

[0032] Figure 9 This is a structural schematic diagram of the support base;

[0033] Figure 10 This is a schematic diagram of one embodiment of the fixed base;

[0034] Figure 11 yes Figure 7 A diagram illustrating the usage status;

[0035] Figure 12 This is a structural schematic diagram of the second faucet workpiece;

[0036] Figure 13This is a schematic diagram combining the usage methods one and two of the faucet positioning tool;

[0037] Figure 14 This is a schematic diagram of one embodiment of the fixed base;

[0038] Figure 15 yes Figure 14 A sectional view.

[0039] Reference numerals: Base plate 100; First screw hole 110; Second screw hole 120; Blind pin hole 130; Second stepped through hole 140; Fixing seat 200; First stepped through hole 201; Base 210; First fixing part 220; First cylinder 221; Second cylinder 222; Second fixing part 230; Third cylinder 231; Frustum 232; Support seat 300; Positioning port 310; First positioning surface 311; Second positioning surface 312; Third positioning surface 313; Screw 410; Nut 420; First faucet workpiece 510; Second faucet workpiece 520; Extension arm 521; Mounting port 530. Detailed Implementation

[0040] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0041] This utility model relates to a faucet positioning fixture, including a base plate 100, a fixed seat 200 and a support seat 300.

[0042] like Figure 1 , Figure 3 , Figure 7 and Figure 8As shown, the base plate 100 is placed horizontally in a flat, plate-like shape. Multiple mounting brackets 200 are detachably mounted on the base plate 100. The mounting brackets 200 and the base plate 100 can be secured with screws, snap-fit ​​connections, or plug-in connections. Alternatively, threaded walls can be directly provided on the mounting brackets 200 to connect them to the base plate 100 via threads. The multiple mounting brackets 200 are arranged in a matrix on the base plate 100, consisting of M horizontal rows × N vertical columns. M and N are both positive integers greater than 1, such as M = 2, 3, 4, 5, etc., and N = 2, 3, 4, 5, etc. M and N can be the same positive integer or different positive integers. In the diagram, the left-right direction represents the orientation of each horizontal row, and the front-back direction represents the orientation of each vertical column. A support base 300 is vertically and flexibly mounted on the base plate 100. The support base 300 and the base plate 100 can be connected via guide rods or other components. The support base 300 slides up and down on the guide rods to adjust its height above the base plate 100. The support base 300 has multiple positioning ports 310, arranged sequentially along the left-right direction. In a top-view orientation, the projection of each positioning port 310 onto the base plate 100 lies in the space between two adjacent horizontal rows, and each positioning port 310 is aligned one-to-one with a fixed seat 200 located in the same vertical column. It can be understood that the number of positioning ports 310 on the support base 300 is the same as the number of fixed seats 200 in a horizontal row, and the aligned positioning ports 310 and fixed seats 200 are in the same vertical column. One or more support bases 300 can be installed on the base plate 100. In this embodiment, the fixing seats 200 are arranged in a 4×6 matrix on the base plate 100. Two support seats 300 are installed on the base plate 100, and both support seats 300 are parallel to the horizontal plates of the row and oriented left and right, with the two support seats 300 distributed front and back. The support seat 300 located on the front side is between the front two rows of fixing seats 200, and the support seat 300 located on the rear side is between the back two rows of fixing seats 200. Each support seat 300 is provided with 6 positioning holes 310.

[0043] In actual use, the faucet positioning fixture has at least two usage methods depending on the number of fixing seats 200 installed on the base plate 100. Usage method one is as follows: Figure 3 , Figure 4 and Figure 5 As shown, a first faucet workpiece 510 with two mounting ports 530 on its bottom is fixed. The two mounting ports 530 of the first faucet workpiece 510 are inserted downwards into two adjacent fixing seats 200 located in the same column for fixation. When the fixing seats 200 are arranged in a 4×6 matrix, up to 12 first faucet workpieces 510 with two mounting ports 530 on their bottoms can be fixed simultaneously. The second usage method is as follows: Figure 7 , Figure 8 and Figure 11As shown, the second faucet workpiece 520 adapted to have an installation port 530 at the bottom and an extension arm at the upper part is fixed. The installation port 530 of the second faucet workpiece 520 is inserted and fixed on a fixing base 200, and then its extension wall is lapped and fixed on the positioning port 310 at the opposite position, so as to support and position the upper and lower parts of the second faucet workpiece 520. When using the second usage method, one of the fixing bases 200 on one of the two adjacent horizontal rows can be disassembled, and only the fixing bases 200 on one horizontal row are retained to cooperate with the support base 300 for use. It can also be, as Figure 13 shown, applying the first usage method and the second usage method simultaneously. After the faucet workpiece is fixed to the faucet positioning tooling, it can cooperate with subsequent processes such as grinding to process the faucet workpiece. In addition, the height of the support base 300 can be adjusted to adapt to the fixing of faucet workpieces of various models. The faucet positioning tooling has a simple structure, is easy to use, has a wide applicability, can adapt to different faucet workpieces for fixing, and improves production efficiency.

[0044] In some embodiments of the present invention, as Figure 9 and Figure 11 shown, the positioning port 310 is formed as a V-shaped depression from the upper side to the lower side of the support base 300. The shape of the positioning port 310 is adapted to the shape of the lower side surface of the extension arm 521 of the second workpiece, and the left and right swaying of the extension arm 521 is restricted by the positioning port 310. Further, the positioning port 310 includes a first positioning surface 311, a second positioning surface 312 and a third positioning surface 313. Both the first positioning surface 311 and the second positioning surface 312 are inclined and distributed in an inverted eight-head shape between the two, where the inverted eight-head shape is the "丷" part of the Chinese character radical. That is, a spaced space that is larger at the top and smaller at the bottom is formed between the first positioning surface 311 and the second positioning surface 312, and the third positioning surface 313 is connected between the bottom sides of the first positioning surface 311 and the second positioning surface 312. The first positioning surface 311 and the second positioning surface 312 limit the left and right sides of the second faucet workpiece 520, and then the bottom side of the extension arm 521 is supported by the third positioning surface 313. Among them, the third positioning surface 313 is a flat surface or a downwardly concave arc surface.

[0045] In some embodiments of the present invention, as Figure 1 shown, a plurality of first screw holes 110 are provided on the bottom plate 100. The axial direction of the first screw holes 110 is the thickness direction of the bottom plate 100. The first screw holes 110 can penetrate through the bottom plate 100 or be blind holes. The first screw holes 110 are arranged in a matrix of M horizontal rows × N vertical columns on the bottom plate 100. Each fixing base 200 is locked and installed on the bottom plate 100 by cooperating with the first screw holes 110 through first screws. The fixing base 200 is quickly positioned and loaded and unloaded relative to the bottom plate 100 through the first screws.

[0046] Based on the above embodiments, as Figure 1and Figure 15 As shown, a first stepped through hole 201 is provided on the fixing base 200. The first stepped through hole 201 extends through the fixing base 200 from the middle in a vertical direction. The upper diameter of the first stepped through hole 201 is larger than its lower diameter. The countersunk head of the first screw abuts against the upper part of the first stepped hole, and the threaded section of the first screw passes through the lower part of the first stepped through hole 201 and is locked into the first screw hole 110.

[0047] In some embodiments of this utility model, such as Figure 1 and Figure 7 As shown, the support base 300 can be configured as a long rod, with screws 410 at both ends of the support base 300 mounted on the base plate 100. The upper and lower sides of the same end of the support base 300 are locked to the screws 410 by nuts 420. The position of the support base 300 on the screws 410 is adjusted and fixed by the nuts 420. Further, the base plate 100 has a second screw hole 120 and a blind hole 130. The axial direction of the second screw hole 120 is parallel to the axial direction of the first screw hole 110. The second screw hole 120 can be configured to penetrate the base plate 100 or be a blind hole. The lower end of the screw 410 is threaded into the second screw hole 120. The blind hole 130 penetrates from one side of the base plate 100 into the second screw hole 120 in a direction perpendicular to the second screw hole 120. The second screw hole 120 can be located close to the side of the base plate 100. The axial direction of the blind hole 130 is horizontal. After connecting the screw 410 to the second screw hole 120, insert the pin into the pin blind hole 130. One end of the pin abuts against the screw 410, thereby fixing the screw 410 and restricting the screw 410 from rotating relative to the second screw hole 120, thus further ensuring that the support base 300 is stably fixed at the current height.

[0048] In some embodiments of this utility model, such as Figure 1 and Figure 2 As shown, the base plate 100 is provided with multiple second-step through holes 140. The upper diameter of the second-step through hole 140 is larger than the lower diameter. When the faucet positioning fixture is in use, it is locked to the worktable by bolts passing through the second-step through holes 140. The bolts are hidden in the second-step through holes 140 and do not protrude from the upper surface of the base plate 100.

[0049] In some specific embodiments of this utility model, the fixing base 200 includes a base 210. The base 210 is provided with at least one of a first fixing part 220 and a second fixing part 230. The base 210 may be cylindrical. For example... Figure 3 , Figure 4 and Figure 6As shown, the first fixing part 220 includes a first cylinder 221 and a second cylinder 222 arranged coaxially in a stepped manner. The outer diameter of the first cylinder 221 is larger than the outer diameter of the second cylinder 222. The outer diameter of the first cylinder 221 is smaller than the minimum outer diameter of the base 210. The first cylinder 221 and the second cylinder 222 can be integrally formed. The upper end of the second cylinder 222 can be set as an arc surface. Figure 7 , Figure 10 and Figure 11 As shown, the second fixing part 230 includes a third cylinder 231 and a frustum 232 coaxially arranged. The top of the frustum 232 is a small outer diameter end, and the bottom is a large outer diameter end. The large outer diameter end of the frustum 232 is coaxially connected to one end of the third cylinder 231, and the outer diameter of the large outer diameter end of the frustum 232 is equal to the outer diameter of the third cylinder 231. The frustum 232 gradually tapers away from the third cylinder. The outer diameter of the third cylinder 231 is smaller than the minimum outer diameter of the base 210.

[0050] There are at least three possible combinations of the base 210 with the first fixing part 220 and the second fixing part 230. For example... Figure 3 , Figure 4 and Figure 6 As shown, when only the first fixing part 220 is provided on the base 210, the end of the first cylinder 221 away from the second cylinder 222 is connected to the base 210. The first cylinder 221, the second cylinder 222, and the base 210 can be integrally formed. The first fixing part 220 is used to cooperate with the mounting port 530 of the first faucet workpiece 510. The mounting port 530 of the first faucet workpiece 510 is fitted onto the first fixing part 220 for radial limiting and fixing, while the base 210 supports the bottom of the first faucet workpiece 510. When it is necessary to fix the first faucet workpiece 510, a fixing seat 200 with the first fixing part 220 is selected. Figure 7 , Figure 10 and Figure 11 As shown, when only the second fixing part 230 is provided on the base 210, the end of the third cylinder 231 away from the frustum 232 is connected to the base 210. The second fixing part 230 is used to mate with the mounting port 530 of the second faucet workpiece 520. The mounting port 530 of the second faucet workpiece 520 is fitted onto the second fixing part 230, and the second fixing part 230 radially limits and fixes the mounting port 530 of the second faucet workpiece 520. The base 210 supports the bottom of the second faucet workpiece 520. Figure 13 and Figure 14As shown, when the base 210 is simultaneously provided with a first fixing part 220 and a second fixing part 230, the end of the first cylinder 221 away from the second cylinder 222 is coaxially connected to the small-diameter end of the frustum 232, and the end of the third cylinder 231 away from the frustum 232 is connected to the base 210. The outer diameter of the first cylinder 221 is smaller than the outer diameter of the small-diameter end of the frustum 232. The first fixing part 220, the second fixing part 230, and the base 210 can be integrally formed. This fixing seat 200 can simultaneously adapt to the first faucet workpiece 510 and the second faucet workpiece 520. When fixing the first faucet workpiece 510, the mounting opening 530 of the first faucet workpiece 510 is fitted onto the first fixing part 220, and then the end face of the small-diameter end of the frustum 232 supports the bottom of the first faucet workpiece 510. When fixing the second faucet workpiece 520, the first fixing part 220 extends into the mounting port 530 of the second faucet workpiece 520 along with the second fixing part 230. The second fixing part 230 is used to radially position the second faucet workpiece 520, and the base part 210 is used to support the bottom of the second faucet workpiece 520.

[0051] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0052] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0053] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0054] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0055] In the description of this specification, references to terms such as "some specific embodiments" indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0056] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A faucet positioning fixture, characterized by, The utility model relates to a faucet workpiece positioning device, including: A bottom plate (100); A fixing seat (200) for fixing the bottom of faucet workpiece, a plurality of fixing seats (200) are arranged in M horizontal rows * N vertical columns matrix on the bottom plate (100), and M and N are positive integers greater than 1; A support seat (300) is liftablely installed on the bottom plate (100), and a plurality of positioning openings (310) for positioning and supporting faucet workpieces are arranged on the support seat (300), the projection of the positioning openings (310) on the bottom plate (100) is located between two adjacent horizontal rows, and the positioning openings (310) are one-to-one aligned with the fixing seats (200) in the vertical column.

2. The faucet positioning fixture of claim 1, wherein: The positioning openings (310) are V-shaped recesses downward from the upper side of the support seat (300).

3. The faucet positioning fixture of claim 2, wherein: The positioning openings (310) include first positioning faces (311), second positioning faces (312) and third positioning faces (313), the first positioning faces (311) and the second positioning faces (312) are both inclinedly arranged and are in inverted octopus distribution between them, and the third positioning faces (313) are connected between the bottom side of the first positioning face (311) and the bottom side of the second positioning face (312).

4. The faucet positioning fixture of claim 3, wherein: The third positioning faces (313) are planes or downwardly recessed arc surfaces.

5. The faucet positioning fixture of claim 1, wherein: A plurality of first screw holes (110) are arranged on the bottom plate (100) in M horizontal rows * N vertical columns matrix, and each fixing seat (200) is installed on the bottom plate (100) by cooperation of a first screw and the first screw hole (110).

6. The faucet positioning fixture of claim 5, wherein: A first stepped through hole (201) is arranged on the fixing seat (200), the upper hole diameter of the first stepped through hole (201) is greater than the lower hole diameter, and the first screw is locked to the first screw hole (110) through the first stepped through hole (201).

7. The faucet positioning fixture of claim 1, wherein: Both sides of the support seat (300) are installed on the bottom plate (100) by a screw rod (410), and the upper and lower sides of the same end of the support seat (300) are locked on the screw rod (410) by a nut (420).

8. The faucet positioning fixture of claim 7, wherein: A second screw hole (120) and a pin blind hole (130) are arranged on the bottom plate (100), the screw rod (410) is connected with the second screw hole (120), the pin blind hole (130) penetrates the second screw hole (120) from one side of the bottom plate (100) in a direction perpendicular to the second screw hole (120), and the pin blind hole (130) is used for inserting a pin.

9. The faucet positioning fixture of claim 1, wherein: A plurality of second stepped through holes (140) are arranged on the bottom plate (100), and the upper hole diameter of the second stepped through hole (140) is greater than the lower hole diameter.

10. The faucet positioning fixture of claim 1, wherein: The fixing seat (200) comprises a base (210) provided with at least one of a first fixing part (220) and a second fixing part (230), the first fixing part (220) comprises a first cylinder (221) and a second cylinder (222) arranged coaxially in steps, the outer diameter of the first cylinder (221) is larger than that of the second cylinder (222), the outer diameter of the first cylinder (221) is smaller than the minimum outer diameter of the base (210), the second fixing part (230) comprises a third cylinder (231) and a circular truncated cone (232) arranged coaxially, the large-diameter end of the circular truncated cone (232) is coaxially connected with one end of the third cylinder (231) and has the same outer diameter, the circular truncated cone (232) gradually reduces in the direction away from the third cylinder, and the outer diameter of the third cylinder (231) is smaller than the minimum outer diameter of the base (210); wherein, when only the first fixing part (220) is arranged on the base (210), the end of the first cylinder (221) away from the second cylinder (222) is connected with the base (210); when only the second fixing part (230) is arranged on the base (210), the end of the third cylinder (231) away from the circular truncated cone (232) is connected with the base (210); when the first fixing part (220) and the second fixing part (230) are arranged on the base (210) at the same time, the end of the first cylinder (221) away from the second cylinder (222) is coaxially connected with the small-diameter end of the circular truncated cone (232), the end of the third cylinder (231) away from the circular truncated cone (232) is connected with the base (210), and the outer diameter of the first cylinder (221) is smaller than that of the small-diameter end of the circular truncated cone (232).

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